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BERNACCHIA, NATASCIA. "Measurement techniques based on image processing for the assessment of biomedical parameters." Doctoral thesis, Università Politecnica delle Marche, 2014. http://hdl.handle.net/11566/242751.
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L’imaging biomedicale rappresenta un tema importante nel settore della diagno-si e della ricerca clinica. I software per l’analisi delle immagini permettono di individuare automaticamente informazioni non visibili all’occhio umano. Lo sviluppo tecnologico e l'u-so di diverse modalità di imaging aprono una sfida circa la necessità di analizzare un volu-me significativo di immagini per garantire informazioni di alta qualità per diagnosi, tratta-mento e monitoraggio, in strutture cliniche così come a casa.
I sistemi di misura comunemente impiegati in ambiente clinico richiedono il contatto con il soggetto, provocando discomfort e risultando non adatti per tempi di osservazione lunghi. D'altra parte, il contatto può alterare la forma, la composizione dei campioni, e tecniche al-lo stato dell'arte potrebbero richiedere molto tempo e fornire bassa risoluzione.
Questa tesi di dottorato presenta una serie di applicazioni sperimentali originali dell’analisi di immagini in campo biomedicale. L'obiettivo è quello di sviluppare e validare nuove me-todologie, basate sull’analisi di immagini, per la misura senza contatto di grandezze di di-versa natura.
Lo studio tratta come prima applicazione l'estrazione di caratteristiche morfologiche di ag-gregati cellulari per studiare i processi di rigenerazione in cuori infartuati, poi lo sviluppo di una metodologia senza contatto per la misura delle proprietà meccaniche dei tendini rotulei di coniglio sottoposti a prove di trazione, e di metodi innovativi per il monitoraggio dei pa-rametri fisiologici (frequenza cardiaca e respiratoria, variazioni di volume del torace) usan-do sistemi quali il dispositivo Kinect ™ e una camera digitale.
I banchi sperimentali, progettati in questo lavoro, sono stati validati, ottenendo un'elevata correlazione rispetto ai metodi di riferimento. I sistemi, seppur diversi per molti aspetti, hanno dimostrato di essere adatti ai rispettivi compiti, confermando la fattibilità dell’approccio basato sull’imaging biomedicale.Biomedical imaging represents an important topic in the field of diagnosis and clinical research. Image analysis and processing software also helps to automatically identify what might not be apparent to the human eye. The technological development and the use of different imaging modalities create more challenges, as the need to analyse a significant volume of images so that high quality information can be produced for disease diagnosis, treatment and monitoring, in clinical structures as well as at home. All the measurement systems routinely used in clinical environment require to be put in di-rect contact with the subject, which in some cases can be uncomfortable or even non-suited for long monitoring. On the other hand, in some cases contact could alter shape or composition of the samples under study, and state-of-the-art techniques could require a lot of time and provide very low resolution. This doctoral thesis presents a series of new experimental applications of the image analysis and processing in the biomedical field. The aim was to develop and validate new method-ologies, based on image analysis, for non contact measurement of quantities of different nature. The study is focused on the extraction of morphological characteristics of cell ag-gregates to assess of the regeneration processes in infarcted hearts, the design of a non con-tact methodology to measure mechanical properties of rabbit patellar tendons subjected to tensile tests, the development of new methods for the monitoring of physiological parame-ters (heart and respiration rate, chest volume variations) through the use of image acquisi-tion systems, as Kinect™ device and a digital camera. The experimental setups, designed in this work, were validated, showing high correlation respect to the reference methods. Imaging systems, although so different in many aspects, have demonstrated to be suitable for the respective tasks, confirming the feasibility of the imaging approach in the biomedical field.
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Walcon, Erin Colleen. "Vital spaces/vital signs : young people, performance, identity and dialogue." Thesis, University of Exeter, 2012. http://hdl.handle.net/10871/9785.
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This thesis advocates that young people’s participatory theatre in Britain is an important site for dialogue - both internally between young people and externally with those in positions of power and authority who have decision-making responsibilities in young people’s lives. Contextualising the work within the field of critical pedagogy, the thesis asks questions about how devised theatre with young participants can be an effective method to start conversations about young people’s identity and role in society. The research was conducted within a Participatory Action Research methodology, and involved about 600 young people from across Devon in a variety of pilot projects which became increasingly dialogic in form over the three years of study. Looking first at the complex issue of ‘youth’ identity within sociology, cultural studies, ethnography and geography, the thesis posits that the fields of theatre and performance studies have important contributions to make to an understanding of how identity is a performed and constructed concept. Building upon this premise, the second chapter overviews the existing field of young people’s participatory theatre in the UK, stipulating that a pedagogical framework built on an historicized understanding of educational theatre is essential to mapping the existing state of practice. This pedagogical framing allows for navigation through the increasingly impact-driven criteria which can profoundly shape the aesthetics and authorship of such work when conducted in the field. These (often silent) shaping forces are analysed through a set of case study examples. Chapter III defines and defends the framing of this work as a form of critical pedagogy, specifically exploring the definitions of dialogue and literac(ies) through case study examples of dialogic practice with young participants. Chapters IV and V examine the PAR research conducted over three years under the heading Vital Spaces/Vital Signs, which moved from small-scale pilot projects in youth centres to larger-scale ‘devised dialogues’ within more traditional theatre spaces. The praxis and findings encountered within the action research are detailed, and recommendations for future extended dialogic work are made.
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Chandrasekaran, Vikram. "Measuring Vital Signs Using Smart Phones." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc33139/.
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Smart phones today have become increasingly popular with the general public for its diverse abilities like navigation, social networking, and multimedia facilities to name a few. These phones are equipped with high end processors, high resolution cameras, built-in sensors like accelerometer, orientation-sensor, light-sensor, and much more. According to comScore survey, 25.3% of US adults use smart phones in their daily lives. Motivated by the capability of smart phones and their extensive usage, I focused on utilizing them for bio-medical applications. In this thesis, I present a new application for a smart phone to quantify the vital signs such as heart rate, respiratory rate and blood pressure with the help of its built-in sensors. Using the camera and a microphone, I have shown how the blood pressure and heart rate can be determined for a subject. People sometimes encounter minor situations like fainting or fatal accidents like car crash at unexpected times and places. It would be useful to have a device which can measure all vital signs in such an event. The second part of this thesis demonstrates a new mode of communication for next generation 9-1-1 calls. In this new architecture, the call-taker will be able to control the multimedia elements in the phone from a remote location. This would help the call-taker or first responder to have a better control over the situation. Transmission of the vital signs measured using the smart phone can be a life saver in critical situations. In today's voice oriented 9-1-1 calls, the dispatcher first collects critical information (e.g., location, call-back number) from caller, and assesses the situation. Meanwhile, the dispatchers constantly face a "60-second dilemma"; i.e., within 60 seconds, they need to make a complicated but important decision, whether to dispatch and, if so, what to dispatch. The dispatchers often feel that they lack sufficient information to make a confident dispatch decision. This remote-media-control described in this system will be able to facilitate information acquisition and decision-making in emergency situations within the 60-second response window in 9-1-1 calls using new multimedia technologies.
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Yang, Fan. "Object Detection for Contactless Vital Signs Estimation." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42297.
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This thesis explores the contactless estimation of people’s vital signs. We designed two camera-based systems and applied object detection algorithms to locate the regions of interest where vital signs are estimated. With the development of Deep Learning, Convolutional Neural Network (CNN) model has many applications in the real world nowadays. We applied the CNN based frameworks to the different types of camera based systems and improve the efficiency of the contactless vital signs estimation. In the field of medical healthcare, contactless monitoring draws a lot attention in the recent years because the wide use of different sensors. However most of the methods are still in the experimental phase and have never been used in real applications. We were interested in monitoring vital signs of patients lying in bed or sitting around the bed at a hospital. This required using sensors that have range of 2 to 5 meters. We developed a system based on the depth camera for detecting people’s chest area and the radar for estimating the respiration signal. We applied a CNN based object detection method to locate the position of the subject lying in the bed covered with blanket. And the respiratory-like signal is estimated from the radar device based on the detected subject’s location. We also create a manually annotated dataset containing 1,320 depth images. In each of the depth image the silhouette of the subject’s upper body is annotated, as well as the class. In addition, a small subset of the depth images also labeled four keypoints for the positioning of people’s chest
area. This dataset is built on the data collected from the anonymous patients at the hospital which is substantial. Another problem in the field of human vital signs monitoring is that systems seldom contain the functions of monitoring multiple vital signs at the same time. Though there are few attempting to work on this problem recently, they are still all prototypes and have a lot limitations like shorter operation distance. In this application, we focused on contactless estimating subjects’ temperature, breathing rate and heart rate at different distances with or without wearing the mask. We developed a system based on thermal and RGB camera and also explore the feasibility of CNN based object detection algorithms to detect the vital signs from human faces with specifically defined RoIs based on our thermal camera system. We proposed the methods to estimate respiratory rate and heart rate from the thermal videos and RGB videos. The mean absolute difference (MAE) between the
estimated HR using the proposed method and the baseline HR for all subjects at different distances is 4.24 ± 2.47 beats per minute, the MAE between the estimated RR and the reference RR for all subjects at different distances is 1.55 ± 0.78 breaths per minute.
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Johnson, Kimberly D. "Patients’ Vital Signs and the Length of Time between the Monitoring of Vital Signs during Times of Emergency Department Crowding." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1301014586.
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Berelowitz, Jonathan. "The development of a neonatal vital signs database." Master's thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/26607.
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Modern intelligent monitoring systems use digital computer technology to analyze and evaluate physiological vital signs. This analytical and evaluative process is performed by algorithms developed for this purpose. The degree of 'intelligence' of the monitoring system is dependent on the 'sensitivity' and 'specificity' of these algorithms. In order to develop robust and clinically valid algorithms, a database of representative waveforms is required. The aim of this thesis was to create a neonatal vital signs database to be used for this purpose, by means of a computer-based central station. The computer was interfaced to a number of neonatal monitors (Neonatal ICU, Groote Schuur Hospital). The monitors were interrogated to obtain patient condition, ECG waveforms and respiration waveforms using the impedance technique. When possible, percentage oxygen saturation was also captured. The database contains 509 documented clinical records obtained from 35 patients and 20 records containing examples of technical alarm conditions and high frequency noise. Additional patient record data is included. Clinical events recorded include apnoea, bradycardia, periodic breathing tachycardia, tachypnoea and normal traces. These events were recorded against a variety of signal quality conditions that have been characterized in Appendix C. A prototype rate detection algorithm was checked using samples from the database.
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Roald, Nikolai Grov. "Estimation of Vital Signs from Ambient-Light Non-Contact Photoplethysmography." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20869.
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Abstract In this thesis we have investigated different aspects of non-contact photoplethysmography (PPG) using only ambient lighting. We have investigated how to develop a functional, automatic system based on this to detect heart rate. We have also investigated how to use the concept of non-contact PPG to acquire further relevant medical information from a human subject. Abstract We have investigated different color spaces and found that the Hue and Saturation channels from HSL and HSV color spaces are far superior to the Green channel of the RGB color space, which has previously been used. Especially under circumstances with much noise, are these channels superior and more robust against noise. Abstract The concept of independent component analysis (ICA) has been investigated as a method of improving results. It is found to improve some channels and color spaces, but the best ICA channel does not have better performance than the best non-ICA channel. Abstract The phase of, and difference between, PPG signals has been investigated as a means of acquiring medical information. The phase measurements are highly vulnerable to noise, but there are indications that occlusion can induce a phase difference between different limbs. This difference can be used to calculate change in blood pressure. Abstract We have synchronized ECG and PPG data, and found that there is a high correlation between the two. Pulse transit time (PTT) from the heart to the measurement site can be calculated using this synchronized information. Abstract Further have different motion compensation algorithms and signal processing techniques been investigated with the goal of improving the PPG signal and a programs ability to automatically detect heart rate.
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Tariq, Abubakar. "Vital signs monitoring using Doppler radar and on-body antennas." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4332/.
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The chest of a person moves due to the heart beating and the lungs expanding and contracting. So the chest movement contains information about the heart and breathing rates. This property is used to detect vital signs using Doppler radar and On-Body antennas. These methods can be accurate, cost-effective, portable, comfortable and low profile alternatives to present commercial heart and breathing rate monitoring devices. The 1st method employing Doppler Effect is non-contact. It detects both the heart and breathing rates using the modulated reflected signals from the chest of a person. A parametric study is conducted considering frequency, power and distance to determine the best parameters for maximum accuracy. A small population study is conducted considering 5 people to validate the accuracy and working of Doppler radar as a vital signs monitor. The 2nd method monitors the heart and breathing rates by sensing motion in the near field proximity of an antenna using the antenna’s reflection coefficient. Simulation studies are conducted using CST chest models to verify the principle. An extensive parametric investigation considering frequency, antenna type, power, antenna location on body, body Position, and distances (between chest and antenna) is conducted to find parameters for maximum detection accuracy. A human population study considering 13 people is conducted to establish heart rate and heart rate variability (HRV) measurement feasibility. A signal processing study is also performed and the best algorithms are identified for accurate detection of vital signs. Besides this novel frequency and pattern reconfigurable antennas are proposed and designed for communications and/or vital signs monitoring purposes.
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Collin, Frida. "Recognising deterioration: nurses’documentation of vital signs–a systematic literature review." Thesis, Örebro universitet, Institutionen för medicinska vetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-90274.
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Introduction: Research show that patients frequently display abnormal vital signs as much as 48h before a serious adverse event occur, such as cardiac arrest or unplanned intensive care unit admission. Therefore, early recognition of these changes trough vital sign examination is essential in the prevention of deterioration. However, deterioration is often missed.Aim: The aim was to investigate to what extent nurses in the general ward are documenting vital signs prior to patient deterioration. Methods: A systematic literature review was done usingthe databases PubMed and CINAHL. Inclusion criteria: general ward and publication 2010-2020, exclusion criteria:emergency department, acute admission ward, paediatric ward, psychiatric ward, interventions and continuousmonitoring. Critical appraisalusingtools from Joanna Briggs Institute. PRISMA statement for reporting of systematic reviews.Results: Nine studies were included. It was seen that the fraction of cases who had vital signs documented prior to deterioration was diverse, although never complete. Some studies showed an acceptable fraction of patients who weremonitoredin the hours prior to deterioration, but it was seen that the monitoring did not always escalate as the patient got worse. The vital signs most frequently documentedwereheart rate and pulse, thoughstill missing in a large fraction of charts. Respiratory rate was documented less than the other vital signs.Conclusions: This study suggests that documentation of vital signs prior to deterioration is diverse but often incomplete. Further research is needed to understand what can be done to improve vital sign documentation on general wards.
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Gasser, William W. "Using five vital signs of spiritual health to evaluate churches." Theological Research Exchange Network (TREN), 1999. http://www.tren.com.
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Russon, Ryan K. "Computerized Measurement of Psychological Vital Signs in a Clinical Setting." [Tampa, Fla. : s.n.], 2003. http://purl.fcla.edu/fcla/etd/SFE0000097.
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Sekak, Fatima. "Microwave radar techniques and dedicated signal processing for Vital Signs measurement." Thesis, Université de Lille (2018-2021), 2021. https://pepite-depot.univ-lille.fr/LIBRE/EDENGSYS/2021/2021LILUN033.pdf.
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Dans le contexte de la sécurisation des systèmes de transport, la surveillance à courte distance de l’activité des personnes, en particulier du conducteur dans un véhicule, constitue un enjeu majeur dans l’amélioration du système d’aide à la conduite. L’application visée dans ce travail concerne principalement le domaine du ferroviaire.Les fréquences respiratoire et cardiaque du conducteur sont des indicateurs clés pour l’évaluation de l’état physiologique. Les méthodes de mesure conventionnelles de ces signes vitaux reposent sur des capteurs opérant en contact direct avec la peau. Par conséquent, le caractère intrusif de ces solutions ne s’avère pas adapté au domaine du transport, en particulier du fait de la gêne induite. Dans le cadre de ces travaux, une solution radar hyperfréquence opérant à faible puissance est proposée pour la mesure en continue des signaux d’activités respiratoire et cardiaque. En particulier, les signaux physiologiques (battements du cœur, mouvement mécanique de la cage thoracique) sont des indicateurs de l’activité humaine qui peuvent être détectés à distance (jusqu’à une dizaine de mètres) au moyen d’ondes électromagnétiques hyperfréquences rayonnées.Bien que la littérature montre un engouement grandissant pour le développement de techniques radars dédiés à la surveillance des personnes, il n’existe pas, à ce jour, de dispositif commercial robuste, sensible et précis. Une analyse fine des paramètres électriques et géométriques de la technique radar est proposée dans ce travail afin d’identifier les sources d’incertitudes, de définir les paramètres optimaux, de valider expérimentalement la solution proposée. Un traitement de signal original, basé sur l’approche cyclostationnaire, est mis en œuvre afin d’extraire les paramètres d’intérêt dans des environnements de mesure de référence ou perturbés. Les solutions matérielles proposées associées à un traitement de signal optimal permettent d’entrevoir des architectures de radar adaptées aux contingences hors laboratoireIn the context of securing transportation systems, short-range monitoring of people's activity, in particular the driver's activity in a vehicle, is a major issue in the improvement of the driver assistance system. The application targeted in this work concerns mainly the railway domain.Respiratory and heart rates of the driver are key indicators for the evaluation of the physiological state. Conventional methods of measuring these vital signs rely on sensors operating in direct contact with the skin. Therefore, the intrusive character of these solutions is not suited for the transportation domain, especially because of the induced discomfort. In this work, a microwave radar solution operating at low power is proposed for the continuous measurement of respiratory and cardiac activity signals. In particular, physiological signals (heartbeat, mechanical movement of the rib cage) are indicators of human activity that can be detected at a distance (up to ten meters) using radiated microwave electromagnetic waves.Although the literature shows a growing interest in the development of radar techniques dedicated to the surveillance of people, there is no robust, sensitive and accurate commercial device available to date. A detailed analysis of the electrical and geometrical parameters of the radar technique is proposed in this work in order to identify the sources of uncertainties, to define the optimal parameters, to validate experimentally the proposed solution. An original signal processing, based on the cyclostationary approach, is implemented in order to extract the parameters of interest in reference or disturbed measurement environments. The proposed hardware solutions associated with an optimal signal processing allow to foresee radar architectures adapted to non-laboratory contingencies
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Babar, Ayesha, and Carine Kanani. "Monitoring of Vital Signs Parameters with ICTs : A Participatory Design Approach." Thesis, Linnéuniversitetet, Institutionen för informatik (IK), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-97030.
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The development of internet-based technologies, the design and adoption of wireless wearable and smart devices have been a growing study spot in all domains. The healthcare sector as many others is making technological progress to improve healthcare services and patients wellbeing and avoid or minimize the use of manual and traditional practices such as the use of paper notes to record the vital signs parameters data. The vital signs parameters are the most monitored physiology features, they produce a big amount of data and request a close follow up to define the health condition of a patient. Continuous vital signs monitoring involves the usage of different devices and systems, which if appropriate positively impact the activities involved, by enabling the continuous generation of data and information about the overall health status of patients and contribute to the wellbeing of individuals, in terms of preventing and reducing fatal risks. To investigate this situation, this research’s focus was in three parts; first, investigate recent research about patient’s health predictions based on vital signs parameters and the impacts of continuous monitoring on the care given. Second, explore the availability in terms of i.e. sensors used in devices that can continuously track vital signs parameters. Last, to provide a possible design recommendation to improve and/or replace the existing devices for vital signs parameters measuring and monitoring in emergency and post-operative care. A qualitative approach and participatory design approach were used to collect data. The qualitative part was achieved through interviews and the participatory design part was accomplished by the future workshop and two prototyping techniques, paper and digital prototypes. The findings of this research were analysed using conceptual analysis, and also discussed using those concepts. Together with the participants, this research resulted in three design suggestions which if implemented shall improve the vital signs continuous monitoring activities, by facilitating the healthcare professionals in their clinical responsibilities and improving the patients wellbeing while admitted in Emergency and Post-operative wards.
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Myrsten, Erik. "Datoriserad screening av barns neurokognitiva funktion: Validering av testbatteriet CNS Vital Signs." Thesis, Stockholm University, Stockholm University, Department of Psychology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-36852.
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Yien, Chris Tak Ming. "Vital signs monitoring for a patient data management system in an ICU." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69721.
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This thesis presents the design and implementation of a Vital Signs Monitoring System for a Patient Data Management System in an intensive care unit. The Vital Signs Monitoring System provides graphical display of patient data to assist medical decision making. It performs real-time patient data acquisition, and supports data management. Visual coding of information has been investigated to ensure effective graphical representation of patient data, to reduce screen clutter, and to enhance interpretability of graphical displays. A survey of existing patient monitoring systems, and patient data management systems is presented to give an overview of the recent advancements in these medical systems. Emphasis is placed on the design of the user interface. Important interface design considerations are discussed, and a survey of interactive hardware, interaction tasks, and dialog style is presented.The Vital Signs Monitoring System was developed in C language under the Presentation Manager window environment, and the operating system environment is OS/2 version 2.0.
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Orrie, Orika. "Smartphone application architecture and security for patient vital signs sensors and indicators." Diss., University of Pretoria, 2005. http://hdl.handle.net/2263/66235.
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South Africa is a developing country with great potential to be leaders in technology and research, especially in the medical field. Rural areas in many countries do not have access to basic healthcare services due to the distance and inaccessibility of these services. Currently people living in the rural areas in South Africa are required to rely on the people within the area, who may not be trained; on doctors who make house calls, who may not be able to access the patient in time or on finding transport to the nearest hospital, which may be hundreds of kilometres away. This leads to many rural residents not seeking aid for aliments thereby often lowering life expectancy. South Africa has many world-renowned medical practitioners who would be able to assist the residents in these areas if there were methods for observation and recording of health statuses without the need for either party to travel. This dissertation studied and developed a method to assist not only the residents in rural areas, but also urban residents to record their vital signs without the assistance of a licenced medical practitioner, to upload the data to a database and to then allow the data to be viewable by the medical practitioner who may be situated elsewhere in South Africa or the world. This system allows for the elimination of human error when recording vital sign data as recording is not done through human intervention. Through the use of communications technologies such as Bluetooth, NFC and Wi-Fi a system was designed which ensures that a patient can record medical data without the presence of a medical practitioner, the patient can access previous health records and readings and the patient can give a new medical practitioner a full medical history. The patient's data has been secured using AES and RSA encryption as well as verification through hash values at all points of transfer and access is granted to the patients' medical data only through the patient or a licenced medical practitioner. The data recording and transfer has been completed taking into consideration all the medical legislation and laws in South Africa. This system allows the South African medical health sector to service all South Africa residents, including the residents in rural areas.Dissertation (MEng)--University of Pretoria, 2016.
Electrical, Electronic and Computer Engineering
MEng
Unrestricted
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Stevenson, Jean E. "Documentation of vital signs in electronic health records : a patient safety issue." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12704/.
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Background and aim: Hospitals in the developed world are increasingly adopting digital systems such as electronic health records (EHRs) for all kinds of documentation. This move means that traditional paper case notes and nursing records are often documented in EHRs. Documentation of vital signs is important for monitoring a patient's physiological condition and how vital signs are presented in a clinical record can have a profound impact on the ability of clinicians to recognise changes, such as deterioration in a patient's condition. Vital signs have received minimal attention with regard to how they are documented in EHRs which suggests that there is an urgent need for this to be examined. Design, methodology and approach: A mixed methods study was conducted in a 372-bed county hospital in two phases. Phase one was a quantitative study, and was followed by a qualitative study in phase two. The aim of the quantitative study was to examine the vital signs documented in the electronic health records of patients who had previously suffered a cardiac arrest. The aim of the qualitative study was to investigate how medical and nursing staff measured, reported and retrieved information on vital signs. Observations were made and interviews were conducted in four clinical areas. Findings: The quantitative study found that documentation of vital signs was incomplete in relation to current universal standards for monitoring vital signs, and that vital signs were dispersed inconsistently throughout the EHR. The qualitative study provided a detailed understanding of the routines and practices for monitoring vital signs and demonstrated variation in routines and in methods of documentation in the four clinical areas. Documenting and retrieving vital signs in the EHR was problematic because of usability issues and led to workflow problems. Workflow problems were solved at ward level by the creation of paper workarounds. Contribution to knowledge: This thesis has shown that poor facilities for the documentation of vital signs in EHRs could have a negative impact on patient safety because it reduces the possibility of good record keeping. This leads to limited availability of easily accessible, up-to-date information, essential for identifying clinical deterioration and, thus, is a challenge to patient safety. Related to this, the thesis has identified possible solutions to usability problems in the EHR. Inconsistent routines and practices were also identified and suggestions were made for how this problem might be approached.
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Pullon, Rebecca. "Monitoring and analysis of antenatal and postnatal changes in maternal vital signs." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:c0992a87-29f1-40cc-8ff0-368cd1944bc9.
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Pregnancy-related complications affect approximately 15% of pregnancies and, if severe, can have long-term consequences. Timely recognition of physiological deterioration is known to reduce the prevalence and severity of complications. However pregnancy-associated changes in vital signs (blood pressure, heart rate, temperature, oxygen saturation, and respiratory rate) complicate the detection of abnormal physiology, and these changes are not well documented. This thesis describes the development of algorithms to ensure the collection of good-quality vital-sign data during the antenatal and postnatal stages of pregnancy, and the design of an evidence-based obstetric early warning score. Vital-sign information from 1,000 pregnant women during pregnancy, labour, and after delivery was collected during the 4P study using pulse oximetry, oscillometry for blood pressure measurement and a tympanic thermometer. Dynamic time warping was used to assess beat-by-beat quality in the photoplethysmograph (PPG) waveform obtained from the pulse oximeter. The resulting signal quality index enabled the exclusion of poor-quality sections and their associated measurements of heart rate and peripheral oxygen saturation. A robust measurement of respiratory rate was obtained by combining information from the PPG waveform, and accelerometer and gyroscope waveforms from a smartphone. After processing, frequency-based techniques, such as Fourier analysis and auto-regressive modelling, and time-domain peak detection were fused to estimate respiratory rate. When compared with the reference respiratory rate obtained from midwife measurement, the lowest mean absolute error of 1.16 breaths per minute was obtained from respiratory rate estimates from the y-axis of the gyroscope. Antenatal and postnatal reference ranges for each vital sign were developed with a standard polynomial multilevel (hierarchical) model using 10,000 vital sign measurements from 620 healthy women in the 4P study. Vital-sign trajectories confirmed known trends of blood pressure and heart rate changes during pregnancy, and provided new information about other vital-sign trends. Additional covariates were included to investigate the effect of parity and body mass index (BMI) on vital-sign trends. The outer centiles of the vital sign reference ranges were used to design an obstetric early warning score (C-ObsEWS) that took into account gestational age or time after delivery. The investigations in this thesis contribute additional knowledge of pregnancy-associated vital-sign changes, and lead to an initial proposal for an evidence-based obstetric early warning score specific to the stage of pregnancy.
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Quinn, Colin Patrick. "Vital signs : costly signaling and personal adornment in the near eastern early neolithic." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Fall2006/c_quinn_121106.pdf.
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Novak, Timothy S. "Vital Signs of U.S. Osteopathic Medical Residency Programs Pivoting to Single Accreditation Standards." Thesis, University of South Florida, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10690580.
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Osteopathic physician (D.O.) residency programs that do not achieve accreditation under the new Single Accreditation System (SAS) standards by June 30, 2020 will lose access to their share of more than $9,000,000,000 of public tax dollars. This U.S. Centers for Medicare & Medicaid Services (CMS) funding helps sponsoring institutions cover direct and indirect resident physician training expenses. A significant financial burden would then be shifted to marginal costs of the residency program’s sponsoring institution in the absence of CMS funding. The sponsoring institution’s ability or willingness to bare these costs occurs during a time when hospital operating margins are at historic lows (Advisory.com /Daily Briefing /May 18, 2017 | The Daily Briefing / Hospital profit margins declined from 2015 to 2016, Moody's finds). Loss of access to CMS funding may result in potentially cataclysmic reductions in the production and availability of primary care physicians for rural and urban underserved populations. Which osteopathic residency programs will be able to survive the new accreditation requirement changes by the 2020 deadline? What are some of the defining attributes of those programs that already have achieved “initial accreditation” under the new SAS requirements? How can the osteopathic programs in the process of seeking the new accreditation more effectively “pivot” by learning from those programs that have succeeded? What are the potential implications of SAS to both access and quality of health care to millions of Americans? This report is based upon a study that examined and measured how osteopathic physician residency programs in the U.S. are accommodating the substantive structural, financial, political and clinical requirements approximately half way through a five-year adaptation period. In 2014, US Graduate Medical Education (GME) physician program accreditation systems formally agreed to operate under a single accreditation system for all osteopathic (D.O) and allopathic (M.D.) programs in the U.S. Since July 1, 2015, the American Osteopathic Association (AOA) accredited training programs have been eligible to apply for Accreditation Council for Graduate Medical Education (ACGME) accreditation. This agreement to create a Single Accreditation System (SAS) was consummated among the AOA, the American Association of Colleges of Osteopathic Medicine (AACOM) and ACGME with a memorandum of understanding. As this research is published, the ACGME is transitioning to be the single accreditor for all US GME programs by June 30, 2020. At that time, the AOA would fully relinquish all its GME program accreditation responsibilities. The new SAS operates under published ACGME guidelines and governance. Business policy and health care resource allocation question motivated this research. Failure of osteopathic programs to “pivot” to the new standards could result in fewer licensed physicians being produced in the high demand primary care field. Potential workforce shortage areas include urban and especially rural populations (CRS Report 7-5700 R44376 Feb 12, 2016). Large physician shortages already have been projected to care for a rapidly aging US population without considering the impact of the GME accreditation changes currently underway (Association of American Medical Colleges 2017 Key Findings report www.aamc.org/2017projections). The goal of this research is to provide osteopathic GME programs practical insights into characteristics of a sample of osteopathic GME programs that have successfully made the “pivot” into SAS requirements and been accredited by ACGME and those that have not. The study seeks to better understand the experiences, decisions, challenges and expectations directly from osteopathic programs directors as they strive to meet the realities of the new SAS requirements. Do programs that are already accredited differ significantly from those that have not? How do characteristics such as program size, geographic locations, clinical program components, program sponsor structure, number and experience of faculty and administration, cost planning and perceived benefits of the movement to SAS factor into successfully meeting the new requirements before the 2020 closing date? A cross-sectional research survey was designed, tested and deployed to a national sample of currently serving osteopathic GME program directors. The survey elicited data about each program’s “pivot” from AOA GME accreditation practices and guidelines to the new Single Accreditation System (SAS). The survey instrument was designed to obtain information about patterns in osteopathic GME program curricula, administrative support functions, faculty training, compliance requirements and program director characteristics shared by those programs that have been granted “initial accreditation” by the Accreditation Council for Graduate Medical Education (ACGME) who administer SAS. Thirty five (35) osteopathic GME program directors responded to the 26 question survey in June 2017. Descriptive statistics were applied and central tendency measures determined. The majority of survey respondents were Doctors of Osteopathic Medicine (D.O.s) from specialty residency programs sponsoring an average of 16 residents. (Abstract shortened by ProQuest.)
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Pitts, David Geoffrey. "The design and evaluation of discrete wearable medical devices for vital signs monitoring." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/10298.
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The observation, recording and appraisal of an individual’s vital signs, namely temperature, heart rate, blood pressure, respiratory rate and blood oxygen saturation (SpO2), are key components in the assessment of their health and wellbeing. Measurements provide valuable diagnostic data, facilitating clinical diagnosis, management and monitoring. Respiratory rate sensing is perhaps the most under-utilised of all the vital signs, being routinely assessed by observation or estimated algorithmically from respiratory-induced beat-to-beat variation in heart rate. Moreover there is an unmet need for wearable devices that can measure all or most of the vital signs. This project therefore aims to a) develop a device that can measure respiratory rate and b) develop a wearable device that can measure all or most of the vital signs. An accelerometer-based clavicular respiratory motion sensor was developed and compared with a similar thoracic motion sensor and reference using exhalatory flow. Pilot study results established that the clavicle sensor accurately tracked the reference in monitoring respiratory rate and outperformed the thoracic device. An Ear-worn Patient Monitoring System (EPMS) was also developed, providing a discrete telemonitoring device capable of rapidly measuring tympanic temperature, heart rate, SpO2 and activity level. The results of a comparative pilot study against reference instruments revealed that heart rate matched the reference for accuracy, while temperature under read (< 1°C) and SpO2 was inconsistent with poor correlation. In conclusion, both of the prototype devices require further development. The respiratory sensor would benefit from product engineering and larger scale testing to fully exploit the technology, but could find use in both hospital and community-based The design and evaluation of discrete wearable medical devices for vital signs monitoring DG Pitts ii Cranfield University monitoring. The EPMS has potential for clinical and community use, having demonstrated its capability of rapidly capturing and wirelessly transmitting vital signs readings. Further development is nevertheless required to improve the thermometer probe and resolve outstanding issues with SpO2 readings.
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Knutsson, Fröjd Lisa, and Marika René. "Mobile documentation of vital signs : A Participatory Design project at a Swedish hospital." Thesis, Linnéuniversitetet, Institutionen för informatik (IK), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-48997.
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We have received a mission from a surgical ward at a hospital in northern Sweden; they want a solution that can be used on portable devices. On these devices the healthcare professionals should be able to document the measured vital signs and the results should automatically be documented in the patient record. In the context of a Participatory Design project we conducted design sessions which focused on the user interface of the solution but also deliberated possible functionalities that were not mentioned in the original mission description. The purpose of this study is to describe the situation surrounding the measurement of vital signs of patients. It is currently done manually on a paper form and then registered in the digital patient record. Our aim was to find a design and formulate the functional requirement of a tablet application together with the staff at a hospital in Sweden.
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Kalvér, Henrik. "Quai-Passive 5.8 GHz Front-End Design and Implementation for Vital Signs Detection." Thesis, Linköpings universitet, Fysik och elektroteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-146270.
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This thesis investigates the possibility to measure vital signs, such as heartbeat and respiratory rate, by developing a RF-front end for wireless detection. The RF-front has been developed and manufactured as a continuous wave Doppler radar receiver, which utilizes quadrature demodulation by means of a multi-port correlator together with power detectors for down conversion. This thesis has been part of an ongoing research project at Link¨opings University, to develop a sensor platform for wireless vital signs detection. This sensor platform has been broken down into two major parts, a radar RF front-end system and a back-end digital signal processing system. The back-end system consist of data acquisition- and a processing-part. It was shown that very low-frequency signals emulating vital signs can be detected, when direct frequency conversion and demodulation are performed with the multi-port detector. Due to the limitations of the instruments, 10-Hz signals were demonstrated.
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Holzhausen, Rudolf. "A clinical patient vital signs parameter measurement, processing and predictive algorithm using ECG." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/6466.
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In the modern clinical and healthcare setting, the electronic collection and analysis of patient related vital signs and parameters are a fundamental part of the relevant treatment plan and positive patient response. Modern analytical techniques combined with readily available computer software today allow for the near real time analysis of digitally acquired measurements. In the clinical context, this can directly relate to patient survival rates and treatment success. The processing of clinical parameters, especially the Electrocardiogram (ECG) in the critical care setting has changed little in recent years and the analytical processes have mostly been managed by highly trained and experienced cardiac specialists. Warning, detection and measurement techniques are focused on the post processing of events relying heavily on averaging and analogue filtering to accurately capture waveform morphologies and deviations. This Ph. D. research investigates an alternative and the possibility to analyse, in the digital domain, bio signals with a focus on the ECG to determine if the feasibility of bit by bit or near real time analysis is indeed possible but more so if the data captured has any significance in the analysis and presentation of the wave patterns in a patient monitoring environment. The research and experiments have shown the potential for the development of logical models that address both the detection and short term predication of possible follow-on events with a focus on Myocardial Ischemic (MI) and Infraction based deviations. The research has shown that real time waveform processing compared to traditional graph based analysis, is both accurate and has the potential to be of benefit to the clinician by detecting deviations and morphologies in a real time domain. This is a significant step forward and has the potential to embed years of clinical experience into the measurement processes of clinical devices, in real terms. Also, providing expert analytical and identification input electronically at the patient bedside. The global human population is testing the healthcare systems and care capabilities with the shortage of clinical and healthcare providers in ever decreasing coverage of treatment that can be provided. The research is a moderate step in further realizing this and aiding the caregiver by providing true and relevant information and data, which assists in the clinical decision process and ultimately improving the required standard of patient care.
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Zeitz, Kathryn. "Post-operative observations, ritualised or vital in the detection of post-operative complications." Title page, contents and abstract only, 2003. http://web4.library.adelaide.edu.au/theses/09PH/09phz483.pdf.
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Copy of author's previously published work inserted. Includes bibliographical references (leaves 273-283). Aims to identify if the current practice of post-operative vital sign collection detects complications in the first 24 hours after the patient has returned to the general ward setting using a combination of methods within a triangulated approach to data collection.
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Lee, Y. D. (Young-Dong). "Wireless vital signs monitoring system for ubiquitous healthcare with practical tests and reliability analysis." Doctoral thesis, Oulun yliopisto, 2010. http://urn.fi/urn:isbn:9789514263880.
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Abstract
The main objective of this thesis project is to implement a wireless vital signs monitoring system for measuring the ECG of a patient in the home environment. The research focuses on two specific research objectives: 1) the development of a distributed healthcare system for vital signs monitoring using wireless sensor network devices and 2) a practical test and performance evaluation for the reliability for such low-rate wireless technology in ubiquitous health monitoring applications.
The first section of the thesis describes the design and implementation of a ubiquitous healthcare system constructed from tiny components for the home healthcare of elderly persons. The system comprises a smart shirt with ECG electrodes and acceleration sensors, a wireless sensor network node, a base station and a server computer for the continuous monitoring of ECG signals. ECG data is a commonly used vital sign in clinical and trauma care. The ECG data is displayed on a graphical user interface (GUI) by transferring it to a PDA or a terminal PC. The smart shirt is a wearable T-shirt designed to collect ECG and acceleration signals from the human body in the course of daily life.
In the second section, a performance evaluation of the reliability of IEEE 802.15.4 low-rate wireless ubiquitous health monitoring is presented. Three scenarios of performance studies are applied through practical tests: 1) the effects of the distance between sensor nodes and base-station, 2) the deployment of the number of sensor nodes in a network and 3) data transmission using different time intervals. These factors were measured to analyse the reliability of the developed technology in low-rate wireless ubiquitous health monitoring applications.
The results showed how the relationship between the bit-error-rate (BER) and signal-to-noise ratio (SNR) was affected when varying the distance between sensor node and base-station, through the deployment of the number of sensor nodes in a network and through data transmission using different time intervals.
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Oesch, Martha Elizabeth. "Bedpans, vital signs, and meds : hospital restructuring and the skill polarization of nursing work." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/69267.
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Vasini, Fabio. "Integration of Internet of Things and Cloud computing. A case study on vital signs monitoring." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10204/.
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Il progresso scientifico e le innovazioni tecnologiche nei campi dell'elettronica, informatica e telecomunicazioni, stanno aprendo la strada a nuove visioni e concetti.
L'obiettivo della tesi è quello d'introdurre il modello del Cloud computing per rendere possibile l'attuale visione di Internet of Thing.
Nel primo capitolo si introduce Ubiquitous computing come un nuovo modo di vedere i computer, cercando di fare chiarezza sulla sua definizione, la sua nascita e fornendo un breve quadro storico.
Nel secondo capitolo viene presentata la visione di Internet of Thing (Internet delle “cose”) che si avvale di concetti e di problematiche in parte già considerate con Ubiquitous computing.
Internet of Thing è una visione in cui la rete Internet viene estesa agli oggetti di tutti i giorni. Tracciare la posizione degli oggetti, monitorare pazienti da remoto, rilevare dati ambientali sono solo alcuni esempi. Per realizzare questo tipo di applicazioni le tecnologie wireless sono da considerare necessarie, sebbene questa visione non assuma nessuna specifica tecnologia di comunicazione. Inoltre, anche schede di sviluppo possono agevolare la prototipazione di tali applicazioni.
Nel terzo capitolo si presenta Cloud computing come modello di business per utilizzare su richiesta risorse computazionali. Nel capitolo, vengono inizialmente descritte le caratteristiche principali e i vari tipi di modelli di servizio, poi viene argomentato il ruolo che i servizi di Cloud hanno per Internet of Thing. Questo modello permette di accelerare lo sviluppo e la distribuzione di applicazioni di Internet of Thing, mettendo a disposizione capacità di storage e di calcolo per l'elaborazione distribuita dell'enorme quantità di dati prodotta da sensori e dispositivi vari.
Infine, nell'ultimo capitolo viene considerato, come esempio pratico, l'integrazione di tecnologie di Cloud computing in una applicazione IoT. Il caso di studio riguarda il monitoraggio remoto dei parametri vitali, considerando Raspberry Pi e la piattaforma e-Health sviluppata da Cooking Hacks per lo sviluppo di un sistema embedded, e utilizzando PubNub come servizio di Cloud per distribuire i dati ottenuti dai sensori. Il caso di studio metterà in evidenza sia i vantaggi sia le eventuali problematiche che possono scaturire utilizzando servizi di Cloud in applicazioni IoT.
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Fleming, Susannah. "Measurement and fusion of non-invasive vital signs for routine triage of acute paediatric illness." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:840d94b0-041f-4b15-8b37-c2e37c999f3e.
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Serious illness in childhood is a rare occurrence, but accounts for 20% of childhood deaths. Early recognition and treatment of serious illness is vital if the child is to recover without long-term disability. It is known that vital signs such as heart rate, respiratory rate, temperature, and oxygen saturation can be used to identify children who are at high risk of serious illness. This thesis presents research into the development of a vital signs monitor, designed for use in the initial assessment of unwell children at their first point of contact with a medical practitioner. Child-friendly monitoring techniques are used to obtain vital signs, which can then be combined using data fusion techniques to assist clinicians in identifying children with serious illness. Existing normal ranges for heart rate and respiratory rate in childhood vary considerably, and do not appear to be based on clinical evidence. This thesis presents a systematic meta-analysis of heart rate and respiratory rate from birth to 18 years of age, providing evidence-based curves which can be used to assess the degree of abnormality in these important vital signs. Respiratory rate is particularly difficult to measure in children, but is known to be predictive of serious illness. Current methods of automated measurement can be distressing, or are time-consuming to apply. This thesis therefore presents a novel method for estimating the respiratory rate from an optical finger sensor, the pulse oximeter, which is routinely used in clinical practice. Information from multiple vital signs can be used to identify children at risk of serious illness. A number of data fusion techniques were tested on data collected from children attending primary and emergency care, and shown to outperform equivalent existing scoring systems when used to identify those with more serious illness.
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Mikhelson, Ilya V. "Real-Time Detection and Tracking of Vital Signs with an Ambulatory Subject Using Millimeter-Wave Interferometry." Thesis, Northwestern University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3595683.
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Finding a subject's heart rate from a distance without any contact is a difficult and very practical problem. This kind of technology would allow more comfortable patient monitoring in hospitals or in home settings. It would also allow another level of security screening, as a person's heart rate increases in stressful situations, such as when lying or hiding malicious intent. In addition, the fact that the heart rate is obtained remotely means that the subject would not have to know he/she is being monitored at all, adding to the efficacy of the measurement.
Using millimeter-wave interferometry, a signal can be obtained that contains composite chest wall motion made up of component motions due to cardiac activity, respiration, and interference. To be of use, these components have to be separated from each other by signal processing. To do this, the quadrature and in-phase components of the received signal are analyzed to get a displacement waveform. After that, processing can be done on that waveform in either the time or frequency domains to find the individual heartbeats. The first method is to find the power spectrum of the displacement waveform and to look for peaks corresponding to heartbeats and respiration. Another approach is to examine the signal in the time domain using wavelets for multiresolution analysis. One more method involves studying the statistics of the wavelet-processed signal. The final method uses a heartbeat model along with probabilistic processing to find heartbeats.
For any of the above methods to work, the millimeter-wave sensor has to be accurately pointed at the subject's chest. However, even small subject motions can render the rest of the gathered data useless as the antenna may have lost its aim. To combat this, a color and a depth camera are used with a servo-pan/tilt base. My program finds a face in the image and subsequently tracks that face through upcoming frames. The pan/tilt base adjusts the aim of the antenna depending on the subject's position. This makes the entire system self-aiming and also allows the subject to move to a new location and to have data acquisition continue.
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Bruijns, Stevan Raynier. "From anxiety to haemorrhage : describing the physiological effects that confound the prognostic inferences of vital signs in injury." Doctoral thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/2855.
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de, Mander Jessica, and Jonathan Danielson. "Modified Early Warning Score bland onkologiska patienter innan dödsfall." Thesis, Uppsala universitet, Institutionen för folkhälso- och vårdvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-215577.
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Bakgrund: Modified Early Warning Score (MEWS) är ett bedömningsinstrument för utvärdering av patienters vitalparametrar. Verktygets funktion är att genom strukturerade observationer identifiera patienter med sviktande vitala funktioner, och således kunna vidta åtgärder innan patienten avlider eller kräver intensivvård. Nyttan av MEWS inom onkologisk heldygnsvård är än så länge dokumenterat i mycket liten utsträckning. En studie från 2012 indikerar att MEWS inte är ett effektivt verktyg för att förutse försämringar hos onkologiska patienter. Syfte: Att undersöka om patienter inom onkologisk vård uppvisar MEWS 0-17 poäng veckan innan dödsfall. Vidare ämnar författarna vilka specifika parametrar inom MEWS som orsakade förhöjda totalpoäng, samt om några skillnader föreligger mellan män och kvinnor. Metod: Retrospektiv journalgranskningsstudie där dokumentation av MEWS-bedömningar granskades i 70 patientjournaler. Resultat: Undersökningsgruppen hade ett genomsnittligt MEWS på 2,99 under den sista levnadsveckan. Av de enskilda variablerna inom MEWS var andningsfrekvens den som oftast gav poäng ≥1. Det genomsnittliga värdet av MEWS steg från 3,13 poäng det sjunde sista till 8 poäng det sista levnadsdygnet, men på grund av den låga frekvensen av mätningar under det sista levnadsdygnet kan inga slutsatser dras från resultatet. Inga signifikanta skillnader mellan män och kvinnor har identifierats. Låg förekomst av registrerade MEWS hos avlidna onkologpatienter orsakade ett stort initialt bortfall. Slutsats: Studien indikerar att MEWS används i liten utsträckning på onkologiska patienter innan dödsfall. Det är dock inte möjligt att med detta underlag uttala sig om huruvida MEWS är ett relevant verktyg inom den onkologiska vården, och vidare forskning måste därför göras.Background: Modified Early Warning Score, MEWS, is a scoring system (0-17 points) for assessment of patients’ vital signs. The function of MEWS is to detect deteriating patients at an early stage, and being able to put in adequate treatment before their physical condition worsens. The benefits from using MEWS on oncology patients have so far been researched to small extent. A study from 2012 indicates that MEWS is not an effective tool for detecting deteriation in oncology patients. Objective: To research if oncology patients have scores 0-17 on MEWS measurements the week before they are deceased. The writers also intend to research which certain parameters within MEWS caused higher overall scores, and lastly whether there are any differences in scores between men and women. Methods: A retrospective review of medical records was performed on a total of 104 MEWS measurements belonging to 70 deceased patients. Results: The main results show an average MEWS of 2,99 points during the last week of the patients’ lives. Respiratory rate was the variable within MEWS to cause elevated scores (≥1) most often. The average MEWS increased from 3,13 points the seventh day before death to 8 points the last day before death, but due to the low frequency of measurements from the last day of the patients’ lives, it is not possible to make any assumptions based on these results. Furthermore, the initial loss of patients meeting the inclusion criteria was substantial due to low prevalence of registered MEWS. Conclusion: The results indicate that MEWS is not used on oncology patients to a great extent. It is not, however, possible to determine whether MEWS is a relevant assessment tool in care of oncology patients, and further research is therefore needed.
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Shah, Syed Ahmar. "Vital sign monitoring and data fusion for paediatric triage." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:80ae66e3-849b-4df1-b064-f9eb7530200d.
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Accurate assessment of a child’s health is critical for appropriate allocation of medical resources and timely delivery of healthcare in both primary care (GP consultations) and secondary care (ED consultations). Serious illnesses such as meningitis and pneumonia account for 20% of deaths in childhood and require early recognition and treatment in order to maximize the chances of survival of affected children. Due to time constraints, poorly defined normal ranges, difficulty in achieving accurate readings and the difficulties faced by clinicians in interpreting combinations of vital signs, vital signs are rarely measured in primary care and their utility is limited in emergency departments. This thesis aims to develop a monitoring and data fusion system, to be used in both primary care and emergency department settings during the initial assessment of children suspected of having a serious infection. The proposed system relies on the photoplethysmogram (PPG) which is routinely recorded in different clinical settings with a pulse oximeter using a small finger probe. The most difficult vital sign to measure accurately is respiratory rate which has been found to be predictive of serious infection. An automated method is developed to estimate the respiratory rate from the PPG waveform using both the amplitude modulation caused by changes in thoracic pressure during the respiratory cycle and the phenomenon of respiratory sinus arrhythmia, the heart rate variability associated with respiration. The performance of such automated methods deteriorates when monitoring children as a result of frequent motion artefact. A method is developed that automatically identifies high-quality PPG segments mitigating the effects of motion on the estimation of respiratory rate. In the final part of the thesis, the four vital signs (heart rate, temperature, oxygen saturation and respiratory rate) are combined using a probabilistic framework to provide a novelty score for ranking various diagnostic groups, and predicting the severity of infection in two independent data sets from two different clinical settings.
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Leonard, Martha Maria. "A description of final year nursing students' ability to recognize abnormal vital signs recordings and clinical decision-making process." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/6663.
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Includes abstract.Includes bibliographical references.
The aim of this study was to determine whether final year nursing students can recognize and respond to abnormal vital sign recordings, and to analyse their clinical decision-making processes.
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Lewandowski, J. "Mobile application of artificial intelligence to vital signs monitoring : multi parametric, user adaptable model for ubiquitous well-being monitoring." Thesis, Coventry University, 2014. http://curve.coventry.ac.uk/open/items/fc80e93c-1a7e-419d-84c7-eaed12d4a953/1.
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Over the next decade, current reactive medicine, is expected to be replaced by a medicine increasingly focused on wellness so called personalised, predictive, preventive, and participatory (P4) will be less expensive, yet more accurate and effective.
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Dall'Ora, Chiara. "The association of nurses' shift characteristics, missed vital signs observations and sickness absence : retrospective observational study using routinely collected data." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/417870/.
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When organising shift work, healthcare managers are required to cover the service across 24 hours in a way that maximises job performance – which includes minimising sickness absence related to work, and creating conditions that allow nursing staff to perform their scheduled tasks. This study aimed to investigate the association between characteristics of shift work in acute hospital wards and nursing staff job performance, in terms of sickness absence and compliance with vital signs observations. This was a retrospective longitudinal observational study using routinely collected data on nursing staff shifts, missed vital signs observations and sickness absence. The study took place in all acute inpatient general wards at a large teaching hospital in the South of England over a three years period. Shift and sickness data were extracted from the electronic shift system and overtime shifts datasets, which are both linked to the hospital payroll. These contain individual records of shifts worked, dates, start and end time, ward and grade for all nurses employed by the hospital. Vital signs observations data were extracted from a database of records made using the VitalPAC™ system. Generalised linear mixed models were used to model the association between shift work characteristics, sickness absence episodes and compliance with vital signs observations. This doctoral research provides new knowledge regarding the association of shift characteristics and job performance outcomes. It found that working high proportions of 12 hours or more shifts is associated with higher sickness absence, regardless of how many days nursing staff had worked in the previous seven days. An association between working 12 hours or more shifts and delaying vital signs observations was found for health care assistants. Drawing on a large and diverse sample size and using objective data, this study is the first in nursing to demonstrate that there is an association between long shifts and job performance.
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Kyriacos, Una. "The development, validation and testing of a vital signs monitoring tool for early identification of deterioration in adult surgical patients." Doctoral thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11688.
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Patients often exhibit premonitory abnormalities in vital signs before an adverse clinical outcome. Patient survival may depend on the decisions of nurses to call for assistance. There is a paucity of published early warning scores (EWS) literature for general ward use from South Africa. In a public hospital in South Africa, the study aimed to develop, validate and test the impact of implementation of a modified early warning scoring (MEWS) system vital signs chart and training programme designed to improve hospital nurses’ performance in early identification of postoperative clinical and physiological deterioration in adult patients.
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Tang, Fohai. "A Mobile System for Vital Sign’s Data Collection and Data Presentation." Thesis, Högskolan Kristianstad, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-9369.
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The purpose of this project work is to make research on vital sign’s data collection and datapresentation on handheld devices. With the development of smart phones and tablets, more andmore people prefer accomplishing their daily tasks on mobile devices. Additionally, theawareness of personal health care increases at the same time. This report consists of three mainparts: analysis, design and implementation and system evaluation. By studying literature andsearching related works on the internet, general design guidelines are documented. The result isthat a prototype is implemented with the functionalities of data collection and data presentation.The system test and evaluation are also completed.
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Bobbia, Serge. "Vers le développement d'un capteur photoplétysmographique sans contact." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK003/document.
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La mesure cardiaque sans contact réalisée grâce aux méthodes de photopléthysmographie sans contact est un domaine de recherche très actif. Depuis l'introduction en 2010 d'une nouvelle méthode de mesure avec des capteurs optiques d'entrée de gamme (webcam PC), les travaux de recherche se sont multipliés. Ainsi, on observe une plus grande diversité des méthodes proposées afin de réaliser la mesure. Egalement, la précision de la mesure a grandement progressé et les scénarios et possibilités d'usage de la technologie sont aujourd'hui très nombreux. Au cœur de ce processus de mesure, la segmentation dans l'image de la ou les zones d'intérêt est une étape clé. Nous proposons dans cette thèse une méthode innovante afin de réaliser la mesure photoplethysmographique sans contact en identifiant implicitement les zones de peau vivante dans la vidéo. Nous avons montré que notre approche permet d'améliorer la qualité de la mesure en favorisant les zones dans l'image où le signal est de plus grande qualité. Afin de rendre possible l'intégration de notre solution, nous avons proposé une nouvelle méthode de segmentation en superpixels, nommée IBIS, qui permet de réduire la complexité algorithmique de cette étape du traitement. Ce faisant, nous avons démontré la faisabilité de l'intégration de notre solution au sein d'une plateforme embarquée. Les différentes méthodes ont été évaluées au travers de plusieurs expérimentations afin de valider leurs performances. Notre méthode de segmentation en superpixels est comparée aux méthodes de l'état de l'art tandis que nous avons implémenté plusieurs des méthodes de mesure du signal photoplethysmographique afin de discuter de l'impact de notre approche sur la qualité de la mesure photoplethysmographique. Que ce soit pour la segmentation en superpixels ou pour l'estimation du rythme cardiaque sans contact, nous avons montré une importante plus-value de nos méthodes comparées à celles disponibles dans la littérature. Les différents travaux présentés dans ce document ont été valorisés au travers de publications en conférences et revueHeart-rate estimation performed with remote photoplethysmography is a very active research field. Since pioneer works in 2010, which demonstrated the feasibility of the measure with low-grade consumers’ camera (webcam), the number of scientific publications have increased significantly in the domain. Hence, we observe a multiplication of the methods in order to retrieve the photoplethysmographic signal which has led to an increased precision and quality of the heart-rate estimation. Region of interest segmentation is a key step of the processing pipeline in order to maximize the quality of the measured signal. We propose a new method to perform remote photoplethysmographic measurement using an implicit living skin identification method. Hence, we have shown that our approach lead to an improvement in both quality of the signal measured and precision of the heart-rate estimation by favoring more contributive area. As we are working with hardware integration constraint, we propose a new superpixels segmentation method which requires significantly less computation power than state of the art methods by reducing the algorithmic complexity of this step. Moreover, we have demonstrated the integration and real time capabilities by implementing our solution to an embedded device. All of our proposed method have been evaluated through different experimentations. Our new segmentation method, called IBIS, have been compared to state of the art methods to quantify the quality of the produced segmentation. To quantify the impact of our approach on the quality of the photoplethysmographic measure, we have implemented and compared state of the art methods with our proposed method. For both the superpixels segmentation and remote heart-rate estimation, our methods have shown great results and advantages compared to state of the art ones. Our works have been reviewed by the scientific community through several conference presentations and journal publications
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Rabbani, Muhammad Saqib. "Microstrip antenna design with improved fabrication tolerance for remote vital signs monitoring and WLAN/WPAN applications at mm-wave and THz frequencies." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8091/.
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A novel approach is introduced to design microstrip patch antennas (MPAs) with improved fabrication tolerance for highly demanded Millimetre-wave (mm-wave) (30-300GHz) and Terahertz (THz) (0.3-3THz) frequency applications. The presented MP A designing method overcomes the challenges which exist with the fabrication and implementation of the conventional MP A designs at mm-wave and THz frequencies. The following research contributions have been added to the state-ofthe- art work: (i) designing of improved size MPAs at 60GHz, 1 OOGHz, 635GHz and 835GHz to prove the designing concept, (ii) detail measurements and analysis of Remote Vital Signs Monitoring (RVSM) with various sizes of the proposed MPA arrays at 60GHz for high detection accuracy and sensitivity, (iii) designing and tes~ing of MP As for 60GHz wireless local and personal area networks (WLAN/WP AN) in point-to-pint, point-to-multipoint and dual-band applications, (iv) implementation and testing of particular Partially Reflective Surface, Dielectric Lens and Defected Ground Structures on the proposed MP A designs with novel configurations at 60GHz for bandwidth and gain enhancement, and (v~ a comprehensive experimental study on the performance of large array designs with the proposed MP A elements for mm-wave applications. The mentioned research work is explained in the coming chapters in details. Moreover, all mentioned work has already been published.
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Barnett, Jared Joshua Anucha. "Weighing the Importance of Vital Signs in the Evaluation of Alcohol Withdrawal in Multiple Ethnicities When Employing the Clinical Institute Withdrawal Assessment." Thesis, The University of Arizona, 2012. http://hdl.handle.net/10150/271614.
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This study was performed at an acute alcohol and drug rehabilitation center in Southern Arizona mainly serving three ethnicities; Caucasian, Hispanic, and Native-American. The CIWA-Ar assessment is used to evaluate the severity of withdrawal and a score of 10 or higher to the subjective questions results in admission to the in-patient unit. It has been observed that the Native-American patients suffering from withdrawal generally score lower on the CIWA-Ar scale compared to the other ethnicities, thus resulting in a lack of admission or reduced treatment. The purpose of this study was to analyze whether blood pressure and pulse should be used in conjunction with the CIWA-Ar assessment to aid in the evaluation of withdrawal among the ethnicities. The three ethnicities were not equally represented at the clinic. It was found that there is statistical evidence that blood pressure and pulse are significantly increased in withdrawal patients of all ethnicities and that the pulse measurements for Native-American patients do not differ from those observed for admitted Caucasian and Hispanic patients. Native-American patients seem to demonstrate similar vital signs to the withdrawing patients of the other two ethnicities, yet only 3 total patients were admitted.
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Gozzi, Svensson Viktoria, and Sofia Sundbom. "Kartläggning av Modified Early Warning Score (MEWS) hos patienter med kirurgiska åkommor." Thesis, Uppsala universitet, Institutionen för folkhälso- och vårdvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202741.
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SAMMANFATTNING Bakgrund: Patienter på kirurgavdelningar är komplexa såtillvida att de förutom den kirurgiska åkomman kan ha olika medicinska diagnoser vilket ofta komplicerar både vården, behandlingen samt medför svårigheter i att upptäcka ett försämrat tillstånd. För att kunna bedöma patientens tillstånd och få en uppfattning om hur denne mår måste objektiva och lätt mätbara parametrar användas. Modified Early Warning Score (MEWS) är ett poängsystem som mäter några av patientens vitala funktioner och baseras på sex mätbara/bedömningsbara funktioner: andningsfrekvens, puls, systoliskt blodtryck, kroppstemperatur, vakenhet och urinmängd. Poängsumman varierar mellan 0 och 17, där 0 är normalt. Syfte: Att kartlägga fördelningen av poäng enligt MEWS hos akuta patienter med kirurgiska åkommor på två kirurgavdelningar på ett universitetssjukhus i Sverige samt undersöka vilka åtgärder som vidtagits vid respektive poäng enligt MEWS. Metod: Retrospektiv journalgranskningsstudie där dokumentation av mätningar med MEWS för 94 patienter granskades. Resultat: Totalt återfanns 229 poäng enligt MEWS varav 76 var från mätningar vid ankomst till avdelning och resterande 153 från mätningar under fortsatt vårdtid. Antalet MEWS-mätningar per patient varierade mellan 1 och 31. Nitton åtgärder som ingår i sjuksköterskans profession kopplade till en poäng enligt MEWS återfanns. De mest förekommande åtgärderna var att ge smärtstillande läkemedel på generell ordination samt att utföra upprepade kontroller av patientens vitala funktioner. Tjugotvå medicinska åtgärder kopplade till en poäng enligt MEWS återfanns. De mest förekommande medicinska åtgärderna var att ordinera provtagning eller odling samt att ordinera extra dropp. Inte i något fall ledde en poäng enligt MEWS till att någon patient flyttade till en högre vårdnivå. Slutsats: Det fanns mätningar enligt MEWS för 85 % av patienterna där medianpoängen var 1 av maximala 17. Medianpoängen när åtgärd som ingår i sjuksköterskans profession eller medicinska åtgärder vidtogs var 4. De vanligaste åtgärderna var att ge smärtstillande läkemedel på generell ordination, göra upprepade kontroller, ordinera provtagning, odling eller extra dropp.ABSTRACT Background: Patients with surgical conditions are complex, since many patients have various medical diagnoses besides their surgical condition. Apart from complicating care and treatment, this makes it difficult to detect deterioration in the patient's condition. In order to assess the patient's condition, objective and easily measurable parameters are preferably used. A scoring system, the Modified Ear ly Waming Score, MEWS, was developed in the early 1990s and based on some ofthe patient's vital functions: respiratory rate, heart rate, systolic blood pressure, body temperature, alertness/awareness and urine output. The result varies between 0 and 17, with 0 demonstrating normal vital functions. Objective: To describe the distribution of MEWS scores for emergency patients with surgical condi tions in two surgical wards at a university hospital in Sweden, and to examine what actions had been taken based on the MEWS scores. Methods: A retrospective review was performed on MEWS measurements and medical records for 94 patients. Results: In total, 229 MEWS measurements had been performed, ofwhich 76 were taken on arrival at the ward, and the remaining 153 <luring the continued hospitalization. The number ofMEWS measurements per patient ranged from 1 to 31. Nineteen actions, based on MEWS scores, related the nursing professions were found, with the administration of painkillers and repeated checks ofthe pa tient's vital functions, being the two most common. Twenty-two medical procedures, based on MEWS scores, were identified, where sampling for bacterial cultures or prescribing extra intravenous fluid were the most frequent. No patient was transferred toa higher level of care because of their MEWS score. Conclusion: MEWS measurements were performed in 85% of the patients and the median result was 1 of maximum 17. Different actions, related the nursing or medical profession, were taken at a me dian result of 4. No patient was transferred toa higher level of care. The most common actions were administration of painkillers, repeated checks ofthe patient's vital functions, sampling for bacterial cultures and prescribing extra intravenous fluid
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Tram, Susan, and Sara Sundvik. "Musikens påverkan på postoperativ smärta." Thesis, Uppsala universitet, Institutionen för folkhälso- och vårdvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-397030.
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Bakgrund: Årligen genomförs cirka 740 000 kirurgiska ingrepp inom slutenvården i Sverige som resulterar i postoperativ smärta. Postoperativ smärta är en typ av akut vävnadsskadesmärta som upplevs till följd av kirurgiskt ingrepp. Om obehandlad kan postoperativ smärta resultera sig i kronisk smärta, försämrad livskvalitet och ökad mortalitet. Musikterapi är en biverkningsfri och icke farmakologisk metod som kan implementeras i vården som ett komplement till traditionell behandling för att lindra postoperativ smärta samt öka patienternas välbefinnande. Syfte: Att undersöka vilken påverkan musik har på postoperativ smärta och de fysiologiska reaktioner som uppstår vid postoperativ smärta. Metod: Denna studie är en beskrivande allmän litteraturstudie med kvantativ ansats. Artikelsökningarna genomfördes i PubMeds– och CINAHLs databas med hjälp av MeSH genererade söktermer, där elva originalartiklar valdes att inkluderas i studien. Utav dessa var det en artikel som efter kvalitetsgranskning exkluderades, då dess kvalité inte var av medel eller högre kvalité. Resultat: Sju av tio studier visade att musik sänkte smärtintensiteten hos patienter som genomgått thorax- eller abdominal kirurgi. Ingen tydlig påverkan på fysiologiska reaktioner postoperativt kunde ses hos samtliga studier. Slutsats: Musik kan användas som en komplementär behandling till sedvanlig vård för att sänka smärtintensiteten hos postoperativa patienter och öka delaktigheten och självbestämmandet hos patienten. Musikterapi är varken kostsamt eller innehåller biverkningar och kan därför implementeras ute i samhället såväl som inom vården. Mer forskning behövs däremot för att se om musik har en påverkan på de fysiologiska reaktionerna som uppstår vid smärta.Background: Approximately 740,000 surgical procedures are performed every year in Sweden, resulting in postoperative pain. Postoperative pain is a type of acute tissue injury that is experienced as a result of a surgical procedure. If not treated properly, postoperative pain can result in chronic pain, worsened quality of life and increased mortality. Music therapy is a cheap non-pharmacological method without side-effects that could be implemented in healthcare as a complement to traditional treatment, to alleviate postoperative pain and increase the well-being of patients. Purpose: To investigate the impact music has on post-operative pain and the physiological reactions that arise from postoperative pain. Method: A descriptive literature study using quantitative methods. The search for articles was done in the database of PubMed and CINAHL with the help of MeSH generated terms. Eleven original articles were included in this study, whereas one of them were excluded later on by not passing the criteria of the quality control. Results: Seven out of ten studies showed that music reduced the pain intensity in patients that had undergone either thoracic- or abdominal surgery. No clear influence on physiological reactions could be seen postoperatively. Conclusion: Music can be used as a complementary treatment to conventional care, to reduce the pain intensity of postoperative patients, and to have patients partake more in their treatment. Since music is cheap och does not involve any side-effect, it can be involved as a analgesic complementary method in society as well as in hospitals. Though more research is needed to see if music has an impact on the physiological responses resulting from pain.
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Hammarqvist, Pia. "Att bedöma vitalparametrar inom akutsjukvård : en kvantitativ enkätstudie om sjuksköterskans bedömning." Thesis, Sophiahemmet Högskola, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:shh:diva-1938.
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Li, Changzhi. "Doppler phase modulation effect for non-contact accurate measruement [sic] of vital signs and other periodic movements from theory to CMOS system on chip integrations /." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024294.
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Eriksson, Sofia, and Michael Metcalfe. "Följsamhet till Early Warning Scores samt faktorer som påverkar följsamheten – en litteraturöversikt." Thesis, Högskolan Dalarna, Omvårdnad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:du-24201.
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Bakgrund: Att tidigt upptäcka symtom på allvarlig klinisk försämring hos en patient är av stor vikt för att minska lidande och förhindra allvarliga komplikationer. För detta har flera skattningsinstrument utvecklats, däribland olika early warning score-system. Dessa har implementerats på flera håll i världen men det finns indikationer på att det brister i följsamheten till dessa. Syfte: Studiens syfte var att undersöka följsamheten till Early Warning Scores samt de faktorer som påverkar följsamheten. Metod: Studien genomfördes som en litteraturöversikt där 14 vetenskapliga artiklar inkluderades. Studierna hade kvantitativa, kvalitativa och blandade ansatser. Artiklarna söktes i databaserna PubMed, CINAHL och Web of Science. En innehållsanalys av studiernas resultat genomfördes och resultatet sammanställdes i ett antal kategorier. Resultat: Följsamheten visade sig vara högre till observationer av patientens vitalparametrar än till de åtgärdsriktlinjer som finns. Faktorer som påverkar följsamheten var sjuksköterskans kliniska erfarenhet, samarbete mellan professioner, bemanning, felkalkylering, dokumentation och rapportering. Konklusion: Följsamhet till EWS brister på många sätt och flera faktorer påverkar följsamheten. Faktorerna som påverkade följsamheten är sjuksköterskans kliniska erfarenhet, samarbete mellan professioner, felkalkylering, bemanning, dokumentation och rapportering.Background: Early recognition of serious clinical deterioration is of great importance for minimizing suffering and serious adverse events. For early recognition, several physiological track and trigger systems have been developed, among them the early warning scores. These have been implemented in many places across the world but there is uncertainty about adherence to these systems. Aim: The aim of this study was to investigate adherence to Early warning score-systems and to evaluate what factors affect this adherence. Method: The study was conducted as a literature review including 14 articles with quantitative, qualitative and mixed-methods approaches. Searches were made in the PubMed, CINAHL and Web of Science databases. Content-analysis was used to identify themes. Results: Adherence seems higher to observations than to clinical responses. The main factors affecting adherence are the clinical experience of nurses, collaboration between professions, staffing, miscalculation, documentation and reporting. Conclusion: Adherence to EWS is lacking in many ways and several causes for this have been accounted for. Factors affecting adherence was the clinical experience of nurses, cooperation between professions, staffing, miscalculation, documentation and reporting.
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Simões, Rafael. "Remote vital signs monitoring: user's guide." Master's thesis, 2008. http://hdl.handle.net/10316/12317.
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O sistema Sinais Vitais permite monitorizar, em tempo real e remotamente, os sinais vitais de uma determinada pessoa de um modo não invasivo e portátil. Esta característica, associada com a funcionalidade de elaborar relatórios com a informação dos sinais medidos, permite afirmar que este sistema e a sua arquitectura podem contribuir para aproximar de um modo proactivo a saúde dos pacientes.
Este tipo de sistemas têm-se afirmado de uma importância fundamental em sociedades com altas taxas de envelhecimento porque permitem recolher grandes quantidades de dados médicos com a utilização de poucos recursos aumentando dessa maneira a eficácia da relação saúde - custo.
Este documento tem como objectivo enquadrar o sistema e as diferentes fases percorridas para a sua implementação.
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Lin, Li-Min, and 林立民. "A PDA-Based Vital Signs measurement System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/58687323628714070368.
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碩士國立中央大學
電機工程研究所
98
Human life gets longer as time goes by that leads to aging of population structure. Taking good care of aged persons and reducing health care costs become very important issues. Home care is a solution to deal with these issues. The purpose of this study is to develop vital signs measurement platform by using a personal digital assistant (PDA) whose operation system is Windows Mobile 5.0. This system lets user measure vital signs and save data conveniently, and therefore reduces health care costs. The vital signs that were measured in this study are: electrocardiography, pulse, blood pressure and body temperature signals. These analog vital signs were converted into digital signals with a microprocessor; the digitized data were then transmitted to a PDA by a Bluetooth module; finally a user interface on PDA was developed with Microsoft Visual Studio C# 2005. Users can read each vital sign on the screen of PDA at the same time and the system save these signals automatically. A cuff-less blood pressure estimation method was applied to our system to make the system easy to use in home care application.
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Marçal, Tiago Alexandre da Silva. "Portable system for vital signs measurment - Firmware." Master's thesis, 2007. http://hdl.handle.net/10316/12229.
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O projecto Sistema Portátil para Medição de Sinais Vitais foi o resultado de uma
parceria entre o Departamento de Física da Unversidade de Coimbra e a empresa ISA. O
projecto teve a partição dos alunos Emeline Gonçalves, Ricardo Martins e Tiago Marçal e
foram orientados, principalmente, pelo professor Carlos Correia, pelo professor José Basílio
Simões e o enginheiro Paulo Santos.
Ao longo deste documento é descrita a estratégia seguida para o desenvolvimento do
projecto. Inicialmente, o aluno tomou contacto com novos conceitos e novas tecnologias úteis
para um posterior desenvolvimento das tarefas solicitadas. A aprendizagem recaiu na
aprendizagem de programação em C, o que são microcontroladores e a construcção de
projectos de programação para microcontroladores baseados em exemplos. Já depois de
finalizada esta apredizagem entendeu-se que também seria útil aprender conceitos sobre a
tecnologia de comunicação wireless Zigbee.
Após o período inicial de assimilação de conceitos, procedeu-se à formulação de toda a
documentação necessária, Visão e Objectivos, Análise de Requisitos e Arquitectura do
Sistema, para melhor enquadrar o nosso projecto à realidade actual. Esta documentação, para
além da ideia anterior, teve também como objectivo antever todos os processos e passos a
seguir, de forma a que não existissem falhas no momento da execução do código.
Por fim, e de forma a testar a montagem das placas dos módulos de aquisição e de
transmissão, elaborou-se um código de teste
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NGUYEN, THI PHUONG NHAN. "Vital Signs Estimation using Doppler Radar Techniques." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/h23krr.
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碩士國立中正大學
電機工程研究所
106
Contactless detection of human body vital signs (respiration rate, heartbeat rate, and blood pressure) using a radar system has been a promising area for future research and clinical practice. In this paper, a continuous-wave 2.45 GHz Doppler radar is used for wirelessly measuring a) respiration rate and respiration inter-interval variation, b) heartbeat rate and heartbeat inter-interval variation, and c) the pulse wave transit time for blood pressure estimation. Both the autocorrelation and conventional Fast Fourier Transform (FFT) estimation algorithms are applied to the received radar signals for computing these vital signs in the time domain and frequency domain, respectively. The autocorrelation algorithm achieves the same accurate estimation of vital-sign inter-interval variation, compared with the MIT's segmentation method. The estimated pulse transit time, using traditional two-radars on heart and elbow simultaneously, indicates a relatively feasibility of blood pressure assessment based on 2.45 GHz radar. It is further shown in this thesis that our proposed single-radar on the elbow can detect the blood pressure assessment as accuracy as the two-radar technique.