Results 211 to 220 of about 24,907 (232)

Fingertip photoplethysmography and migraine

Journal of the Neurological Sciences, 2003
Whether migraine is accompanied by generalized disturbance of arteries throughout the body remains unclear. The second derivative of the fingertip photoplethysmography waveform (SDPTG) is now considered a useful tool for evaluating peripheral circulation.
Kan-ichiro, Komatsu, Toshio, Fukutake, Takamichi, Hattori   +2 more
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Vaginal photoplethysmography: Methodological considerations

Archives of Sexual Behavior, 1979
Methodological considerations related to the use of vaginal photoplethysmography in the experimental investigation of physiological sexual arousal in women are discussed. Specific topics covered include the operation and use of the device, methods of data reduction and analysis, and the role of vaginal photoplethysmography in the study of female sexual
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Multi-Channel Facial Photoplethysmography Sensing

2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2020
Motivated by the need for continuous cardiovascular monitoring, we present a system for performing photoplethysmography sensing at multiple facial locations. As a proof-of-concept, our system incorporates an optical sensor array into a wearable face mask form factor for application in a surgical hemodynamic monitoring use case. Here we demonstrate that
Parker S, Ruth, Jerry, Cao, Millicent, Li, Jacob E, Sunshine, Edward J, Wang, Shwetak N, Patel   +5 more
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Noninvasive Monitoring by Photoplethysmography

Clinics in Perinatology, 2012
The photoplethysmogram (PPG) is a noninvasive circulatory signal related to the pulsatile volume in tissue and is displayed by many pulse oximeters. The PPG is similar in appearance to the invasive arterial waveform, but is noninvasive and ubiquitous in hospitals.
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Respiration Signals from Photoplethysmography

Anesthesia & Analgesia, 2013
Pulse oximetry is based on the technique of photoplethysmography (PPG) wherein light transmitted through tissues is modulated by the pulse. In addition to variations in light modulation by the cardiac cycle, the PPG signal contains a respiratory modulation and variations associated with changing tissue blood volume of other origins.
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Signal recovery in imaging photoplethysmography

Physiological Measurement, 2013
Imaging photoplethysmography is an emerging technique for the extraction of biometric information from people using video recordings. The focus is on extracting the cardiac heart rate of the subject by analysing the luminance of the colour video signal and identifying periodic components.
Benjamin D, Holton, Kavan, Mannapperuma, Peter J, Lesniewski, John C, Thomas   +3 more
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Cardiac arrhythmia detection using photoplethysmography

2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2017
Cardiovascular Diseases (CVDs) cause a very large number of casualties around the world every year and cardiac arrhythmias contribute to significant proportion of CVD related deaths. Bedside cardiac activity monitors in hospitals are based on electrocardiogram (ECG) processing and are known to produce too many false alarms.
Neeraj, Paradkar, Shubhajit Roy, Chowdhury   +1 more
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Hemodynamic sensing using subcutaneous photoplethysmography

American Journal of Physiology-Heart and Circulatory Physiology, 2008
Pacemakers and implantable defibrillators presently operate without access to hemodynamic information. If available, such data would allow tailoring of delivered therapy according to perfusion status, optimization of device function, and enhancement of disease monitoring and management.
Robert G, Turcott, Todd J, Pavek
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Photoplethysmography detection by smartphone's videocamera

Proceedings of the 6th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems, 2011
Smartphone's video cameras become more and more powerful while the devices itself become used by many people. That allows utilizing them for many every-day tasks. One of such suitable application of the widely used smartphones is monitoring the state of the health.
Grimaldi D, Kurylyak Y, Lamonaca F, Nastro A   +3 more
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Novel photoplethysmography system

AIP Conference Proceedings, 2001
Optical technologies are new technical tool which are being implemented for medical diagnosis and prescription in various processes related to detection within human blood. They have the virtue of be noninvasive method and nondestructive methods, in addition to being a remote detection technique, sensibility enough as to study the properties of the ...
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