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Dissertations / Theses on the topic 'Photoplethysmograph'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Jiang, Honghui 1979. "Motion-aircraft resistant design of photoplethysmograph ring sensor for driver monitoring." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27040.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.<br>"Feb. 2004."<br>Includes bibliographical references (leaves 61-62).<br>Through extensive literature search, it has been found that there exists strong correlation between the Mental Workload of an automobile driver with his or her physiological measurements, especially the Heart Rate Variability (HRV) measurements. In order to make a driver's HRV monitoring on the road possible, a new photoplethysmograph (PPG) Ring Sensor prototype has been devised specifically for countering the problem of motion a

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2

Marinković, Aleksandar S. M. Massachusetts Institute of Technology. "Reconstructing the blood pressure waveform using a wearable photoplethysmograph sensor and hydrostatic pressure variations measured by accelerometers." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38705.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.<br>Includes bibliographical references (leaves 51-54).<br>An important part of a routine clinical examination is the assessment of the arterial blood pressure waveform. The variations in shape of the waveform indicate the presence of disease. In this work, a method is developed for the reconstruction of arterial blood pressure waveform using the signals obtained from a noninvasive wearable photoplethysmographic Ring Sensor and hydrostatic pressure variations measured by an Arm Accelerometer Sensor. A d

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3

Chang, Serene Hsi-Lin. "Clinical evaluation of a new optical fibre method of measuring oxygen saturation using photoplethysmograph signals reflected from internal tissues." Thesis, Queen Mary, University of London, 2013. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8719.

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Traditional methods of measuring oxygen saturation, e.g. pulse oximetry, depend on an adequate peripheral circulation and have a 20–30 second lag time before readings are obtained. This was a series of evaluations of novel optical probes, designed to measure oxygen saturation using fibreoptic technology directly from internal organs including the brain, oesophagus and organs with splanchnic circulations. A series of pilot studies were proposed and research ethics approval obtained to carry out studies in humans, under general anaesthesia, using these probes. Innovative reflectance probes were

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4

Mueller, Jonathon W. "The effect of differentiation technique utilized in continuous noninvasive blood pressure measurement." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1145295553.

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5

Smithers, Breana Gray. "Evaluating the Pulse Sensor as a Low-Cost and Portable Measurement of Blood Pulse Waveform." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849682/.

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This study was aimed at determining whether the digital volume pulse waveform using the Pulse Sensor can be used to extract features related to arterial compliance. The Pulse Sensor, a low-cost photoplethysmograph, measures green light reflection in the finger and generates output, which is indicative of blood flow and can be read by the low-cost Arduino UNO™. The Pulse Sensor code was modified to increase the sampling frequency and to capture the data in a file, which is subsequently used for waveform analysis using programs written in the R system. Waveforms were obtained using the Pulse Sen

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6

Hayes, Matthew J. "Artefact reduction in photoplethysmography." Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/7094.

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The use of optical techniques in biomedical monitoring and diagnosis is becoming increasingly widespread, primarily because of the non-invasive nature of optically derived measurements. Physiological analysis is usually achieved by characterisation of the spectral or temporal properties of the interaction between light and the anatomy. Although some optical measurements require complex instrumentation and protocols, recent technological advances have resulted in robust and compact equipment that is now used routinely in a multitude of clinical contexts. Unfortunately, these measurements are in

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7

Shi, Ping. "Photoplethysmography in noninvasive cardiovascular assessment." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/5399.

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The electro-optic technique of measuring the cardiovascular pulse wave known as photoplethysmography (PPG) is clinically utilised for noninvasive characterisation of physiological components by dynamic monitoring of tissue optical absorption. There has been a resurgence of interest in this technique in recent years, driven by the demand for a low cost, compact, simple and portable technology for primary care and community-based clinical settings, and the advancement of computer-based pulse wave analysis techniques. PPG signal provides a means of determining cardiovascular properties during the

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8

Cheang, Peck-Yeng (Sharon). "Feasibility of non-contact photoplethysmography." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/34255.

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This thesis explores and investigates the feasibility of a non-contact photoplethysmography system operating in both transmission and reflection modes. Several issues are addressed in the implementation of the non-contact system, including the dynamic range of PPG signals, ambient artefacts and effects of direct coupling, which is light that is detected without any interaction with the measured tissue area. Plethysmography has been used in a range of biomedical applications to study blood volume changes. All current applications employ contact probes, where the transducers are positioned direc

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9

Zaunseder, Sebastian, Alexander Trumpp, Hannes Ernst, Michael Förster, and Hagen Malberg. "Spatio-temporal analysis of blood perfusion by imaging photoplethysmography." SPIE, 2018. https://tud.qucosa.de/id/qucosa%3A35157.

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Imaging photoplethysmography (iPPG) has attracted much attention over the last years. The vast majority of works focuses on methods to reliably extract the heart rate from videos. Only a few works addressed iPPGs ability to exploit spatio-temporal perfusion pattern to derive further diagnostic statements. This work directs at the spatio-temporal analysis of blood perfusion from videos. We present a novel algorithm that bases on the two-dimensional representation of the blood pulsation (perfusion map). The basic idea behind the proposed algorithm consists of a pairwise estimation of time delay

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10

Zheng, Jia. "Opto-Physiological Modelling of Imaging Photoplethysmography." Thesis, Loughborough University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.519660.

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11

Sun, Yu. "Imaging photoplethysmography : towards effective physiological measurements." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/9143.

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Since its conception decades ago, Photoplethysmography (PPG) the non-invasive opto-electronic technique that measures arterial pulsations in-vivo has proven its worth by achieving and maintaining its rank as a compulsory standard of patient monitoring. However successful, conventional contact monitoring mode is not suitable in certain clinical and biomedical situations, e.g., in the case of skin damage, or when unconstrained movement is required. With the advance of computer and photonics technologies, there has been a resurgence of interest in PPG and one potential route to overcome the above

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12

Crabtree, Vincent P. "Non-invasive vascular assessment using photoplethysmography." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/7752.

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Photoplethysmography (PPG) has become widely accepted as a valuable clinical tool for performing non-invasive biomedical monitoring. The dominant clinical application of PPG has been pulse oximetry, which uses spectral analysis of the peripheral blood supply to establish haemoglobin saturation. PPG has also found success in screening for venous dysfunction, though to a limited degree. Arterial Disease (AD) is a condition where blood flow in the arteries of the body is reduced,a condition known as ischaernia. Ischaernia can result in pain in the affected areas, such as chest pain for an ischear

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13

Allen, John. "Measurement and analysis of multi-site photoplethysmographic pulse waveforms in health and arterial disease." Thesis, University of Newcastle Upon Tyne, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247830.

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14

John, Gareth W. "Measurement of venous blood flow using photoplethysmography." Thesis, Cardiff University, 2005. http://orca.cf.ac.uk/54076/.

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This simple, non-invasive test will reduce the patient numbers requiring the more time-consuming ultrasound examination, by screening out a high proportion of individuals who definitely do not have lower limb DVT. However, further signal processing methods should be investigated to improve the specificity of the test.

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15

MacConachie, Middleton Paul. "Physiological and clinical implications of photoplethysmography waveforms." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525237.

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16

Trumpp, Alexander, Johannes Lohr, Daniel Wedekind, et al. "Camera-based photoplethysmography in an intraoperative setting." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-234950.

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Background Camera-based photoplethysmography (cbPPG) is a measurement technique which enables remote vital sign monitoring by using cameras. To obtain valid plethysmograms, proper regions of interest (ROIs) have to be selected in the video data. Most automated selection methods rely on specific spatial or temporal features limiting a broader application. In this work, we present a new method which overcomes those drawbacks and, therefore, allows cbPPG to be applied in an intraoperative environment. Methods We recorded 41 patients during surgery using an RGB and a near-infrared (NIR) camera. A

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17

Butler, Matthew J. "Motion artefact reduction for reflection-mode photoplethysmography." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52390/.

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Photoplethysmography (PPG) is a technique that uses light to measure the local changes in blood-volume in subjects (predominantly humans). Multiple useful statistics can be gained from such a measurement; heart-rate and it's variability, blood-oxygen saturation and even an estimation of blood pressure, to name but a few. Compared to other measurement techniques, photoplethysmography is favourable as it is both non-invasive, since nothing physical penetrates the subjects skin, and safe, as the subject is galvanically isolated from the test equipment (additional benefits also exist). Motion arte

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18

Aniagyei-Mensah, Gideon. "Noninvasive Detection of Central Venous Waveform Using Photoplethysmography." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30711.

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Information about the central venous pressure is important in evaluating several clinical conditions including cardiac failure and volume overload. The jugular veins serve as a primary route for the indirect estimation of the central venous pressure or waveform. The conventional methods for acquiring the central venous pressure in these veins have been through neck visualization and the insertion of catheters. Even though these procedures are effective if done properly, they have various downsides such as being invasive, inaccurate and time consuming. In this research, a sensor is proposed fo

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19

Ravindranathan, Devi. "Photoplethysmography for the evaluation of diabetic autonomic neuropathy." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54981/.

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The aim of this study was to determine if photoplethysmography (PPG) could be used to analyse the foot microvascular changes caused by diabetic autonomic neuropathy. The digital PPG signals were collected from 37 healthy volunteers (Group I), 35 diabetic patients (Group II), and 38 diabetic patients with sensory neuropathy (Group III) and analysed using MAT LAB. Prominent spectral peaks with sidebands were obtained at both the high frequency (HF) and the low frequency (LF) end of the Fourier spectrum of these PPG signals. Previous studies of microcirculation have shown that both are sympatheti

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20

Soleimani, Vahid. "Remote depth-based photoplethysmography in pulmonary function testing." Thesis, University of Bristol, 2018. http://hdl.handle.net/1983/f6a6f7b6-943f-43f7-b684-1612161aee1a.

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This thesis introduces several novel, noninvasive lung function assessment approaches in which we incorporate computer vision techniques to remotely compute standard clinical Pulmonary Function Testing (PFT) measures. Using a single depth sensor, a dynamic 3-D model of a subject's chest is reconstructed and used to generate chest volume-time data by estimating the chest volume variation throughout a sequence. Following computation of multiple keypoints and calibration of volume-time data to present real volume of exchanged air, 7 Forced Vital Capacity (FVC) measures and 4 Slow Vital Capacity (

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21

Patterson, James. "A photoplethysmography system optimised for pervasive cardiac monitoring." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/11110.

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Photoplethysmography is a non-invasive sensing technique which infers instantaneous cardiac function from an optical measurement of blood vessels. This thesis presents a photoplethysmography based sensor system that has been developed speci fically for the requirements of a pervasive healthcare monitoring system. Continuous monitoring of patients requires both the size and power consumption of the chosen sensor solution to be minimised to ensure the patients will be willing to use the device. Pervasive sensing also requires that the device be scalable for manufacturing in high volume at a buil

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22

Kuboyama, Yuta. "Motion artifact cancellation for wearable photoplethysmographic sensor." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61168.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 65-66).<br>Photoplethysmography (PPG) is a non-invasive and unobtrusive technique to measure heart rate from the surface of the skin, by exposing a section of the skin to an LED light and measuring the changes in reflected light due to the blood pulsing through under the skin. However, PPG signals are highly susceptible to motion artifacts, and in order for this technique to be useful for heart r

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23

AUDEBERT, SYLVIE. "La photoplethysmographie : principe, fonctionnement, interets en medecine." Toulouse 3, 1989. http://www.theses.fr/1989TOU31143.

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24

Chatterjee, Subhasri. "Monte Carlo investigation of light-tissue interaction in photoplethysmography." Thesis, City, University of London, 2018. http://openaccess.city.ac.uk/21266/.

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Photoplethysmography (PPG) is a non-invasive photometric technique which measures changes in the volume of blood in the biological tissue. PPG is well-known for its application in pulse oximetry used for the continuous monitoring of arterial blood oxygen saturation (SpO2). Over the past decade, there has been a plethora of research in the field of PPG, with potential applications beyond pulse oximetry and heart rate monitoring. Such applications explore the utilisation of PPG for the assessment of various bio-markers relating to vascular mechanics, haemodynamics and many others. With the growi

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Abay, Tomas. "Reflectance photoplethysmography for non-invasive monitoring of tissue perfusion." Thesis, City, University of London, 2016. http://openaccess.city.ac.uk/16923/.

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Monitoring blood perfusion and oxygenation changes is of vital importance and for this reason many different techniques have been developed over the decades. Photoplethysmography (PPG) is an optical technique that measures blood volume variations in vascular tissue and it is well known for its utilisation in pulse oximetry for the estimation of arterial blood oxygen saturation (SpO2). In pulse oximetry, mainly the pulsatile component of the signal (AC PPG) is used while the continuous DC component is mostly excluded. Near Infrared Spectroscopy (NIRS) is another optical technique that measures

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26

Almond, Nicholas Edward. "A fibre-optic laser Doppler flowmeter system and its application to the study of the skin microcirculation in humans." Thesis, Queen Mary, University of London, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389908.

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27

Nilsson, Lena. "Respiratory monitoring using reflection mode photoplethysmography : clinical and physiological aspects /." Linköping : Dept. of Medicine and Care, Univ, 2005. http://www.bibl.liu.se/liupubl/disp/disp2005/med898s.pdf.

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28

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. E

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Qin, Dong. "HAND-ARM VIBRATION EXPOSURE MONITORING WITH SKIN TEMPERATURE AND PHOTOPLETHYSMOGRAPHY." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1492098556166678.

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Botina, Monsalve Deivid. "Remote photoplethysmography measurement and filtering using deep learning based methods." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2022. http://www.theses.fr/2022UBFCK061.

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RPPG est une technique développée pour mesurer le signal du pouls et ensuite estimer les données physiologiques telles que la fréquence cardiaque, la fréquence respiratoire et la variabilité du pouls.En raison des multiples sources de bruit qui détériorent la qualité du signal RPPG, les filtres conventionnels sont couramment utilisés. Cependant, certaines altérations demeurent, alors qu'un œil expérimenté peut facilement les identifier. Dans la première partie de cette thèse, nous proposons le réseau LSTMDF (Long Short-Term Memory Deep-Filter) pour réaliser le filtrage du signal RPPG. Nous uti

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Поврозник, Наталія Іванівна, та Natalia Povroznyk. "Імітаційна модель пульсового сигналу для тестування алгоритмів опрацювання фотоплетизмографічних систем". Thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2017. http://elartu.tntu.edu.ua/handle/123456789/18874.

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У дипломній роботі розроблено комп’ютерну імітаційну модель пульсового сигналу у вигляді періодично подовжених сум двох функцій нормального розподілу із урахуванням випадковості, періодичності та зміни фази коливання. Імітаційна модель дає можливість за відомими медичними параметрами моделювати сигнали патологій і норм для задачі для задачі верифікації методів опрацювання сигналів в фотоплетизмографічних системах. Розроблено програмне забезпечення в середовищі Matlab з метою автоматизації процесу імітування пульсових сигналів.<br>In the thesis work developed a computer simulation model of pul

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Li, Kejia. "Wireless reflectance pulse oximeter design and photoplethysmographic signal processing." Thesis, Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/4143.

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Deshmane, Anagha Vishwas. "False arrhythmia alarm suppression using ECG, ABP, and photoplethysmogram." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54209.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2009.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (p. 91-93).<br>A signal quality assessment scheme for the photoplethysmogram waveform recorded by a pulse oximeter has been created. The signal quality algorithm uses statistical methods on time-series and spectral analysis to locate h

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Uyanik, Civek Ceren. "Signal Quality Assessment of Photoplethysmogram for Heart Rate Estimation." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1593651500804312.

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Wenngren, Wilhelm Sven Ingemar. "Local pulse wave velocity detection over an arterial segment using photoplethysmography." University of British Columbia, 2017. http://hdl.handle.net/2429/63867.

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The goal of this thesis is to determine the validity of using photoplethysmography (the detection of changes of blood volume using light) to measure pulse wave velocity as part of a continuous and non-disruptive blood pressure monitor. There has been a limited advancement over the years in technologies to monitor personal blood pressure, which have rendered at-home monitoring still relatively intrusive. The main method for at-home blood pressure monitoring is the use of an inflating cuff that obstructs the artery to detect pressure. This system suffers from inherit drawbacks, such as limitatio

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Shaltis, Phillip Andrew. "A wearable blood pressure sensor using oscillometric photoplethysmography and micro accelerometers." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40363.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.<br>Includes bibliographical references (leaves 119-124).<br>Monitoring arterial blood pressure (ABP) with a sensor virtually imperceptible to the wearer, for continuous periods of weeks, months, or years, could prove revolutionary in the diagnosis and treatment of chronic hypertension and heart failure, as well as a monitoring tool for convalescing individuals, and individuals in hazardous duty (such as firefighters or soldiers). To this end, a miniaturizable, non-invasive blood pressure sensor is de

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Chan, Gregory Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Early detection of blood loss using a noninvasive finger photoplethysmographic pulse oximetry waveform." Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/42593.

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Delayed control of haemorrhage or blood loss has been recognised as a major contributor to preventable trauma deaths, but early detection of internal bleeding is difficult due to unreliability of heart rate (HR) and blood pressure (BP) as markers of volume status. This thesis explores a novel method of early blood loss detection using a noninvasive finger photoplethysmographic (PPG) pulse oximetry waveform that is normally utilised in pulse oximeters for estimating arterial oxygen saturation. Graded head-up tilt (n = 13) and blood donation (n = 43) in human volunteers were selected as experim

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Njoum, H. "Investigations of photoplethysmography in the assessment of haemodynamics, vascular mechanics and haemorheology." Thesis, City, University of London, 2017. http://openaccess.city.ac.uk/17837/.

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Real‐time cardiovascular assessment is vital for monitoring patients at an early stage of cardiovascular diseases (CVDs), at risk of reoccurrence of heart attacks and strokes and during pharmacological and non‐pharmacological treatments. Blood Pressure (BP), Arterial Stiffness (AS) and Blood Viscosity (BV) are three essential parameters that can provide a reliable assessment of hypertension, atherosclerosis, and hyperviscosity associated with the development and progression of cardiovascular pathologies to complex stages. The currently available methods designed for evaluation of such paramete

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Cherif, Safa. "Effective signal processing methods for robust respiratory rate estimation from photoplethysmography signal." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0094/document.

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Le photopléthysmogramme (PPG) est un signal optique acquis à partir de l’oxymètre de pouls, dont l’usage principal consiste à mesurer la saturation en oxygène. Avec le développement des technologies portables, il est devenu la technique de base pour la surveillance de l’activité cardio-respiratoire des patients et la détection des anomalies. En dépit de sa simplicité d'utilisation, le déploiement de cette technique reste encore limité pour deux principales raisons : 1. L’extrême sensibilité du signal aux distorsions. 2. La non-reproductibilité entre les sujets et pour les mêmes sujets, en rais

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George, Kuriakose Joshi. "A histological functional and photoplethysmographic study of compressive spinal cord injury." Thesis, Queen Mary, University of London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515518.

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Hümbs, Sophie [Verfasser]. "Anwendung der Photoplethysmographie und der Elektrokardiographie zur Diagnostik schlafbezogener Atmungsstörungen / Sophie Hümbs." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2014. http://d-nb.info/1047097559/34.

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Odinsdottir, Gudny Björk, and Jesper Larsson. "Deep Learning Approach for Extracting Heart Rate Variability from a Photoplethysmographic Signal." Thesis, Högskolan Kristianstad, Fakulteten för naturvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-21368.

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Photoplethysmography (PPG) is a method to detect blood volume changes in every heartbeat. The peaks in the PPG signal corresponds to the electrical impulses sent by the heart. The duration between each heartbeat varies, and these variances are better known as heart rate variability (HRV). Thus, finding peaks correctly from PPG signals provides the opportunity to measure an accurate HRV. Additional research indicates that deep learning approaches can extract HRV from a PPG signal with significantly greater accuracy compared to other traditional methods. In this study, deep learning classifiers

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Wu, Mengjiao. "Equivalence testing for identity authentication using pulse waves from photoplethysmograph." Diss., 2019. http://hdl.handle.net/2097/39461.

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Doctor of Philosophy<br>Department of Statistics<br>Suzanne Dubnicka<br>Christopher Vahl<br>Photoplethysmograph sensors use a light-based technology to sense the rate of blood flow as controlled by the heart’s pumping action. This allows for a graphical display of a patient’s pulse wave form and the description of its key features. A person’s pulse wave has been proposed as a tool in a wide variety of applications. For example, it could be used to diagnose the cause of coldness felt in the extremities or to measure stress levels while performing certain tasks. It could also be applied to quant

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Yang, Yuan-Chang, and 楊元彰. "The Study of a Photoplethysmograph Pulse to Sound Transform System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/42433410101627860887.

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碩士<br>義守大學<br>電子工程學系碩士班<br>94<br>In Tradition Chinese medicine. feel the pulse is a very important skill. Physicians can diagnostic the individual’s physical condition from the pulse change. The goal of this paper is to find a method to convert the pulse into audible sound. By using the blood circulation and pulse information as an index. convert them into sound and base on this sound signal to evaluate a humans physical state. Our system measure the blood flow by using an IR LED project infrared through capillary then receive the reflect light by an optical-transistor. A microprocessor is ado

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Hu, Shih-Fan, and 胡世凡. "The correlation between arterial blood pressure and photoplethysmograph waveforms with different forearm temperature." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/46786161885468134030.

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碩士<br>元智大學<br>電機工程學系<br>98<br>Microcirculation is an important part of in the human’s circulation system, many research prove that lots of disease related with circulation variation.Traditional Chinese medicine（TCM）can trace its history back to thousands of years ago. The "Touching" is an important step in TCM, and its principle is touching the "Pulse Felt" to evaluate the state of health for diagnostics. In recent years, many researches had proved that the "Pulse Felt" reflects the vascular sclerosis microcirculation had become to a diagnostic index in human system. In this study, we attempte

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Hong, Chia-Chun, and 洪嘉駿. "Development of a Pulse Oximeter Module to Estimate Continuous Blood Pressure Based on Photoplethysmograph." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/82443781257565730987.

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碩士<br>聖約翰科技大學<br>自動化及機電整合研究所<br>99<br>In this thesis we present the development of a pulse oximeter to estimate continuous blood pressure based on photoplethysmograph and consider its application in home care scenario. In order to accomplish our goal, we combined a sphygmomanometer and a photoplethysmograph module to design a non-invasive blood pressure module which can estimate the continuous blood pressure. First, the Oscillometric Method was used to obtain the diastolic pressure and the systolic pressure of a person. The two parameters are further applied to calibration of the voltage-to-pr

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Wu, Tsung-Lin, and 吳宗霖. "The correlation between blood pressure and photoplethysmograph waveforms when applying different skin contacting force." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/96709285325701640617.

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碩士<br>元智大學<br>電機工程學系<br>97<br>Traditional Chinese medicine（TCM）can trace its history back to thousands of years ago. The "Touching" is an important step in TCM, and its principle is touching the "Pulse Felt" to evaluate the state of health for diagnostics. In recent years, many researches had proved that the "Pulse Felt" reflects the vascular sclerosis; therefore, microcirculation had become to a diagnostic index in human system. In this study, we attempted to find out whether there was any relative transfer functions and conditions between the blood pressure（BP）and photoplethysmograph（PPG）sig

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KUO, CHUN-HUNG, and 郭俊宏. "Blood Pressure Estimation Using Photoplethysmography." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/3qt8p6.

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碩士<br>國立中正大學<br>電機工程研究所<br>104<br>In this study, we proposed a blood pressure estimation system. We estimated systolic and diastolic blood pressure by using Photoplethysmography (PPG). The database collected by the projects supported by the grants from Ministry of Science and Technology (NSC 102-2410-H-194-022) to Chia-Ying Weng. The system contained five parts, namely data classification, physiological signal acquisition, feature points detection, feature extraction, and blood pressure estimation. In the data classification part, data were divided into four categories including healthy stude

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Schäck, Tim. "Photoplethysmography-Based Biomedical Signal Processing." Phd thesis, 2019. https://tuprints.ulb.tu-darmstadt.de/8411/1/2019-01-24_Sch%C3%A4ck_Tim.pdf.

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In this dissertation, photoplethysmography-based biomedical signal processing methods are developed and analyzed. The developed methods solve problems concerning the estimation of the heart rate during physical activity and the monitoring of cardiovascular health. For the estimation of heart rate during physical activity, two methods are presented that are very accurate in estimating the instantaneous heart rate at the wrist and, at the same time, are computationally efficient so that they can easily be integrated into wearables. In the context of cardiovascular health monitoring, a method for

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Huang, Fu-Hsuan, and 黃福塤. "Analysis of Reflectance Photoplethysmography Sensor." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/18410700934549786797.

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碩士<br>中原大學<br>醫學工程研究所<br>97<br>Photoplethysmography is an easy method for measuring blood volume change in tissue. It's detect signals include: the vasoconstriction low frequency signal and the pulse's high frequency signal.Since the transmission type of measurement is limited to only a few specific positions that have a short pathlength.The reflectance type can be more convenient to apply on most part of body surface.This study is to analyze the factors that determine the quality of light reflectance signal. These factors include: the emitter-detector distance, wavelength, light intensity, an

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