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Dissertations / Theses on the topic 'Blood flow monitoring'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

Dahnoun, Naim. "Continuous monitoring of blood flow." Thesis, University of Leicester, 1990. http://hdl.handle.net/2381/34319.

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An extensive review of the literature revealed that there are still significant weakness in the available technology for blood flow measurement. This dissertation describes two techniques for blood velocity measurement. The first is an invasive method which uses multimodal optical fibres for light transmission to and from a sensing tip, which attenuates the light depending upon the blood velocity. The design and construction of this flowmeter is presented and bench results shown. The modulated light is transmitted to the detection and processing circuit and provision is made for the transducer

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2

吳志萍 and Chi-ping Ng. "Cerebral blood flow monitoring of brain injured patients." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31214484.

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3

Ng, Chi-ping. "Cerebral blood flow monitoring of brain injured patients /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18777077.

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4

Von, Krüger Marco Antônio. "Doppler ultrasound tracking instrument for monitoring blood flow." Thesis, University of Leicester, 2000. http://hdl.handle.net/2381/29367.

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There are situations, during surgery, in the immediate post-operative period, and in neonatal and adult intensive care units, where monitoring the blood supply to a certain organ or region of the body could be of great value. Doppler ultrasound has great potential for monitoring blood flow velocity because it is a reliable, noninvasive method and produces results in real time. In addition, the development of Doppler technology associated with the recent progress of electronics and computerization has widened the range of information that can be extracted from the Doppler signal. Despite its gr

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5

Fellows, Lesley Kathleen. "In vivo monitoring of cerebral energy metabolism and blood flow." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314846.

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6

Andrew, Margaret L. "Automatic analysis of gated blood pool studies." Thesis, University of Brighton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334330.

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7

Valdés, Escobar Claudia Patricia. "New laser speckle methods for in vivo blood flow imaging and monitoring." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/285015.

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Blood flow and its regulation, as well as hemodynamics in general, are important for the health of tissues and hence the measurement of these quantities has many applications in research and clinical environments. Various optical techniques are attractive for the measurement of blood flow since they are often non- or minimally-invasive, continuous and are relatively inexpensive. During my PhD I have contributed to the monitoring of blood flow in experimental animal models with the construction of a multimodal device, based on laser speckle flowmetry and optical intrinsic signals, capable of m

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8

Valdés, Escobar Claudia Patricia. "New laser speckle methods for in vivo blood flow imaging and monitoring." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4367/document.

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Le débit sanguin et sa régulation sont des indicateurs importants de la santé des tissus. Leur mesure a de nombreuses applications en recherche fondamentale et clinique. Certaines techniques optiques constituent un moyen intéressant pour la mesure du débit sanguin, car en général elles sont peu invasives et relativement abordables car elles utilisent des systèmes d'illumination continus. Pendant ma thèse, j'ai contribué au développement de techniques de suivi de la circulation sanguine dans des modèles animaux avec la construction d'un dispositif multimodal basé sur la fluxmétrie laser et sur

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9

Thomas, Nicholas. "On the application of the Doppler effect in pulsed Doppler flowmeters and the effect of certain propagation and scattering artifacts." Thesis, King's College London (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297092.

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10

Germon, Timothy John. "The validation of cerebral near infrared spectroscopy in adults." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299334.

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11

Kumar, Hemant. "Software analytical tool for assessing cardiac blood flow parameters /." View thesis, 2001. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030724.122149/index.html.

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12

González, Pijuán Carmen. "Development of new algorithms for depth of anesthesia monitoring integrating cerebral blood flow estimations." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/671626.

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Cerebral blood flow (CBF) reflects the rate of delivery of arterial blood to the brain. Since no nutrients, oxygen or water can be stored in the cranial cavity due to space and pressure restrictions, a continuous perfusion of the brain is critical for survival. Anesthesia is known to affect cerebral hemodynamics , but CBF is only monitored in critical patients due to the lack of a continuous and affordable bedside monitor for this purpose. This Thesis propases a potential solution through bioelectrical impedance, also known as rheoencephalography (REG), that could fill the existing gap for a l

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13

Sweetman, Lorna. "The effects of non-uniform insonation on ultrasound monitoring of cerebral blood flow changes." Thesis, University of Leicester, 2006. http://hdl.handle.net/2381/29892.

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Transcranial Doppler is widely used to measure flow velocity in the middle cerebral artery. These measurements are sometimes combined with Doppler power for use as an indicator of cerebral blood flow changes. This is based on the assumption that the power of the Doppler signal depends on the number of scatters within the beam, which is proportional to the vessel area, so any changes in vessel area will be matched exactly by changes in Doppler signal power. A three-dimensional numerical model was developed to incorporate data from beam shape measurements with various vessel shapes and sizes in

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14

Donnelly, Joseph. "Intracranial monitoring after severe traumatic brain injury." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/271422.

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Intracranial monitoring after severe traumatic brain injury offers the possibility for early detection and amelioration of physiological insults. In this thesis, I explore cerebral insults due raised intracranial pressure, decreased cerebral perfusion pressure and impaired cerebral pressure reactivity after traumatic brain injury. In chapter 2, the importance of intracranial pressure, cerebral perfusion pressure and pressure reactivity in regulating the cerebral circulation is elucidated along with a summary of the existing evidence supporting intracranial monitoring in traumatic brain injury.

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15

Cardim, Danilo Augusto. "Non-invasive monitoring of intracranial pressure using transcranial Doppler ultrasonography." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267988.

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Intracranial pressure (ICP) is an important monitoring modality in the clinical management of several neurological diseases carrying the risk of fatal intracranial hypertension. However, this parameter is not always considered due to its invasive assessment. In this scenario, a non-invasive estimation of ICP (nICP) may be essential, and indeed it has become a Holy Grail in Clinical Neurosciences: extensively searched, albeit never found. This thesis is devoted to the assessment, applications and development of transcranial Doppler (TCD)-based non-invasive methods for ICP and cerebral perfusion

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16

Gurley, Katelyn. "USE OF HYBRID DIFFUSE OPTICAL SPECTROSCOPIES IN CONTINUOUS MONITORING OF BLOOD FLOW, BLOOD OXYGENATION, AND OXYGEN CONSUMPTION RATE IN EXERCISING SKELETAL MUSCLE." UKnowledge, 2012. http://uknowledge.uky.edu/cbme_etds/3.

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This study combines noninvasive hybrid diffuse optical spectroscopies [near-infrared spectroscopy (NIRS) and diffuse correlation spectroscopy (DCS)] with occlusive calibration for continuous measurement of absolute blood flow (BF), tissue blood oxygenation (StO2), and oxygen consumption rate (VO2) in exercising skeletal muscle. Subjects performed rhythmic dynamic handgrip exercise, while an optical probe connected to a hybrid NIRS/DCS flow-oximeter directly monitored oxy-, deoxy-, and total hemoglobin concentrations ([HbO2], [Hb], and [tHb]), StO2, relative BF (rBF), and relative VO2 (rVO2) in

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17

Kucukal, Erdem. "BIOMIMETIC MICROFLUIDIC PLATFORMS FOR MONITORING CELLULAR INTERACTIONS IN MICROSCALE FLOW." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1576231265150031.

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18

Li, Hua. "Point-of-care Blood Coagulation Monitoring Using Low-cost Paper-based No-reaction Lateral Flow Assay Device." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535382646333815.

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19

Sonenblum, Sharon Eve. "Biomechanical responses to seated full body tilt and their relationship to clinical application." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31815.

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Thesis (Ph.D)--Bioengineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Sprigle, Stephen; Committee Member: Brani Vidakovic; Committee Member: Charlie Lachenbruch; Committee Member: John L. Lin; Committee Member: Rudy Gleason. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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20

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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21

Wright, Andrew William. "Umbilical arterial flow analysis to determine an index of placental impedance." Master's thesis, University of Cape Town, 1994. http://hdl.handle.net/11427/27050.

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Umbilical flow velocity waveforms (FVW' s) can be measured non-invasively using Doppler ultrasound. Changes in the FVW's occur long before the warning signs from other conventional monitoring methods. Correct interpretation of the changes in the FVW has the potential of providing the clinician with an early warning of foetal distress. A number of indices have been described in the literature to characterise the FVW including the Pulsatility Index (PI), the Resistance Index (RI) and more recently, the High Resistance State Index (HRSI). Researchers have shown a dependence of the FVW, and thus t

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22

Ahmadi, Sirous. "Monitoring muscle oxygenation and myoelectric activity after damage-inducing exercise." University of Sydney, 2007. http://hdl.handle.net/2123/2240.

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Doctor of Philosophy<br>In this thesis, three experiments were conducted to monitor: (i) muscle oxygenation and electromyographic activity of the biceps brachii after exercise-induced muscle damage (ii) muscle oxygenation after downhill walking-induced muscle damage, and, (iii) muscle oxygenation following a bout of vigorous concentric exercise. Maximal eccentric exercise (EE) of biceps brachii resulted in significantly increased mean resting oxygen saturation and decreased deoxyhaemoglobin. During isometric contractions at 50% and 80% of subjects’ maximum voluntary torque (MVT), oxygen desatu

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23

Cheng, Ran. "NONINVASIVE NEAR-INFRARED DIFFUSE OPTICAL MONITORING OF CEREBRAL HEMODYNAMICS AND AUTOREGULATION." UKnowledge, 2013. http://uknowledge.uky.edu/cbme_etds/9.

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Many cerebral diseases are associated with abnormal cerebral hemodynamics and impaired cerebral autoregulation (CA). CA is a mechanism to maintain cerebral blood flow (CBF) stable when mean arterial pressure (MAP) fluctuates. Evaluating these abnormalities requires direct measurements of cerebral hemodynamics and MAP. Several near-infrared diffuse optical instruments have been developed in our laboratory for hemodynamic measurements including near-infrared spectroscopy (NIRS), diffuse correlation spectroscopy (DCS), hybrid NIRS/DCS, and dual-wavelength DCS flow-oximeter. We utilized these noni

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24

Minuzzi, Rosângela da Rosa. "Proteína S-100ß do bulbo da jugular interna : um marcador de dano neuronal isquêmico em endarterectomia de carótida com clampeamento temporário." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/17757.

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A endarterectomia de carótida tem um papel bem estabelecido na prevenção de AVC ipsilateral em pacientes com mais de 50% de estenose sintomática da artéria carótida interna. No entanto, o dano cerebral isquêmico contribui significativamente para a morbidade e mortalidade perioperatórias aumentadas na endarterectomia de carótida com clampeamento intra-operatório temporário. Portanto a relação entre a gravidade do dano isquêmico neuronal durante o procedimento e o sistema de auto-regulação do funcionamento da relação oferta/consumo de oxigênio cerebral precisa ser explorado. Esta avaliação poder

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25

Kircher, Michael [Verfasser], and O. [Akademischer Betreuer] Dössel. "Towards an Efficient Gas Exchange Monitoring with Electrical Impedance Tomography - Optimization and validation of methods to investigate and understand pulmonary blood flow with indicator dilution / Michael Kircher ; Betreuer: O. Dössel." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1225400996/34.

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26

Cathelyn, Jim, and L. Lee Glenn. "Effect of Ambient Temperature and Cardiac Stability on Two Methods of Cardiac Output Measurement." Digital Commons @ East Tennessee State University, 1999. https://dc.etsu.edu/etsu-works/7534.

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The dependence of cardiac output measurement precision on ambient temperature and cardiac output stability was assessed by concurrent continuous and bolus thermodilution methods in postoperative cardiac surgery patients. The degree of agreement between the two methods was depended on room temperature (0.1 L/min for each degree below 25 degrees C). The agreement was also closer in trials where cardiac output was stable (< 10% variation). The continuous thermodilution method shows sufficient agreement with the bolus method for use in critical care; however, improved precision of cardiac output t

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27

Leidel, Jason M. "In vitro partial-body dose assessment using a radiation responsive protein biomarker /." Download the thesis in PDF, 2005. http://www.lrc.usuhs.mil/dissertations/pdf/Leidel2005.pdf.

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28

Chiou, Ming-Chang, and 邱銘樟. "Wireless Blood Flow Parameters Monitoring System for Blood Circulation Observing in Type II Diabetic Rat." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/56899838722602864234.

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29

Hsieh, Chang-Jung, and 謝昌融. "A CMOS-MEMS Capacitive Tactile Sensor For Non-Invasive Blood Flow Monitoring." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/28865467265328434687.

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碩士<br>國立臺灣大學<br>電子工程學研究所<br>100<br>In this research, we try to develop a capacitive tactile sensor for non-invasive blood flow monitoring. The capacitance variation of the capacitive tactile sensor was measured with the membrane deflection by an external pressure. This capacitive sensor is realized by using the CMOS-MEMS fabrication process which is based on TSMC 0.35μm 2P4M (2 polycrystalline silicon and 4 metal) process and self-developed post process. Two metal sacrificial layers of M1 and M3 are etched so the sensing electrodes of other two metal layers of M2, M4, and one polycrystalline s

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30

Lin, Jia-Wei, and 林家瑋. "Preliminary study of using Blood-Flow Monitoring System in the evaluation of Metabolic Syndrome." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/14245987183417051769.

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碩士<br>國立臺灣科技大學<br>醫學工程研究所<br>101<br>The Department of Health announced that seven classes in ten leading cause of death was related with chronic disease in Taiwan. Because obesity increased of suffering from metabolic syndrome, which was high risk group caused by cardiovascular disease and type 2 diabetes. The group was usually accompanied by high blood pressure, high blood sugar, and high blood lipid. In the late stage, it not only easily damaged to vascular but also caused arterial lesions. The aim of this study was to establish blood-flow monitoring system in the evaluation of metabolic syn

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31

Chen, Hsing-Yu, and 陳星宇. "Exploiting piezoresistive sensor and pulse wave velocity measurements for developing a non-invasive real-time blood flow monitoring system." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/k947uy.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>106<br>In this thesis, we proposed a real-time blood-flow-monitoring system with the merits of being portable and easy-to-operate for medical emergency applications. This device was designed to measure the patients’ blood pressures and arterial blood flow velocities via a non-invasive measuring approach. In most circumstances of performing cardiopulmonary resuscitation (CPR) to cardiac arrest patients, rescuers are required to palpate the patients’ carotid arteries to detect the recovery status. However, this method is unreliable due to the lack of quantitative stan

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32

Mars, Maurice. "An evaluation of the use of transcutaneous oxygen pressure measurement in the non-invasive vascular laboratory : with special reference to selection of amputation level." Thesis, 2001. http://hdl.handle.net/10413/7444.

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Transcutaneous oxygen pressure measurement (TCp02) using a miniaturised Clarke electrode and a heating thermistor was developed independently by Huch et al and Eberhardt et al in 1972. After its initial use to non invasively monitor arterial partial pressure (Pa02) in neonates it was proposed as a useful test of skin blood flow and possibly amputation wound healing level selection in patients with peripheral vascular disease. Unfortunately a wide range of predictive values emerged with some authors reporting amputations healing when the TCp02 value was 0 mmHg. The investigation, while still co

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33

Chen, Chung-Kuang, and 陳重光. "Diagnosis and treatment combined with integrated pulse-type micro end of circulation of blood flow monitoring system developed to improve." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/11228950661658522927.

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碩士<br>元智大學<br>電機工程學系<br>98<br>In this thesis, based on the way to build embedded systems both measurement and treatment of functional non-invasive medical device system. and provide an easy user interface of the people。There are two main framework﹐one way to measure real-time through the system to capture signals of human peripheral vascular volume changes﹐to achieve the purpose of monitoring physiological signals。Second, for the use of low-frequency sound waves as a physical device to achieve the improvement of microcirculation in the treatment of functional﹐and look forward to combining home

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34

"Development of a canine flow probe model to investigate aspects of cardiac monitors and vasopressor therapies that can not be tested clinically." 2004. http://library.cuhk.edu.hk/record=b6073715.

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Peng Zhiyong.<br>"December 2004."<br>Thesis (Ph.D.)--Chinese University of Hong Kong, 2004.<br>Includes bibliographical references (p. 146-175)<br>Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Mode of access: World Wide Web.<br>Abstracts in English and Chinese.

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35

Sutin, Jason. "Development of a novel diffuse correlation spectroscopy platform for monitoring cerebral blood flow and oxygen metabolism: from novel concepts and devices to preclinical live animal studies." Thesis, 2017. https://hdl.handle.net/2144/20823.

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New optical technologies were developed to continuously measure cerebral blood flow (CBF) and oxygen metabolism (CMRO2) non-invasively through the skull. Methods and devices were created to improve the performance of near-infrared spectroscopy (NIRS) and diffuse correlation spectroscopy (DCS) for use in experimental animals and humans. These were employed to investigate cerebral metabolism and cerebrovascular reactivity under different states of anesthesia and during models of pathological states. Burst suppression is a brain state arising naturally in pathological conditions or under deep ge

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