Results 91 to 100 of about 7,351 (197)

Photoplethysmography Revisited: From Contact to Noncontact, From Point to Imaging [PDF]

IEEE Transactions on Biomedical Engineering, 2016
Photoplethysmography (PPG) is a noninvasive optical technique for detecting microvascular blood volume changes in tissues. Its ease of use, low cost and convenience make it an attractive area of research in the biomedical and clinical communities. Nevertheless, its single spot monitoring and the need to apply a PPG sensor directly to the skin limit its
Yu, Sun, Nitish, Thakor
openaire   +2 more sources

Portable Radar for Noncontact Heart Rate Monitoring and Estrus Detection in Dairy Cows

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
This study introduces a portable radar system for real‐time monitoring of respiratory and heart rates in dairy cows. It uses millimeter‐wave Frequency Modulated Continuous Wave (FMCW) radar to perform noncontact physiological sensing, reducing behavioral disturbance. The radar system's design prioritizes portability, cost‐effectiveness, and robustness,
Yingxiu Li, Ranran Wang, Fuyang Tian, Yudao Li, Zhuolin Wang, Yuxin Yu, Liping Ma, Xin Lu   +7 more
wiley   +1 more source

Conduit Artery Photoplethysmography and its Applications in the Assessment of Hemodynamic Condition [PDF]

, 2015
Elektroniskā versija nesatur pielikumusPromocijas darbā ir izstrādāta maģistrālo artēriju fotopletizmogrāfijas (APPG) metode hemodinamisko parametru novērtējumam.
Grabovskis, Andris
core  

Technologies for equine welfare and performance monitoring under field conditions – Where do we stand?

Equine Veterinary Journal, EarlyView.
Abstract The need for comprehensive equine welfare assessments has become particularly evident amid ongoing debates about the social licence to operate in equestrian sports. During exercise, multiple physiological systems, principally the cardiovascular, respiratory, muscular, thermoregulatory, endocrine, and locomotory systems, undergo complex ...
Rhana Mackie Aarts, Esther W. Siegers, Filipe M. Serra Braganca, P. René van Weeren   +3 more
wiley   +1 more source

Peripheral arterial disease: diagnostic challenges and how photoplethysmography may help [PDF]

, 2015
Peripheral arterial disease (PAD) affects approximately 20% of patients aged ≥60 years.1 A GP with an average list size of 1800 patients can expect to have 50–60 patients with PAD.
Allen, John, Haining, Shona, Sims, Andrew, Stansby, Gerard, Wilkes, Scott   +4 more
core   +1 more source

Cerebral and Peripheral Hemodynamics Across Wakefulness and NREM Sleep

Journal of Sleep Research, EarlyView.
ABSTRACT Wake/sleep‐related changes in cerebral hemodynamic oscillations are well established, but similar changes in peripheral hemodynamics remain largely understudied. Moreover, how the relationship between cerebral and peripheral hemodynamics varies across sleep–wake states is not well understood, despite evidence that these oscillations in the low‐
Vidhya V. Nair, Brianna R. Kish, Hideyuki Oshima, Qiuting Wen, Yunjie Tong, A. J. Schwichtenberg   +5 more
wiley   +1 more source

Nurses’ and patients’ experiences and preferences of the Ankle-Brachial Pressure Index and Multi-site Photoplethysmography for the diagnosis of peripheral arterial disease: A qualitative study [PDF]

, 2019
Peripheral arterial disease is a global health problem, affecting around 20% of people aged over 60 years. Whilst ankle-brachial pressure index (ABPI) is regularly used for diagnosis, it has a number of limitations, which have presented a need for ...
Allen, John, Lecouturier, Jan, Rousseau, Nikki, Scott, Jason, Sims, Andrew, Stansby, Gerard, Wilson, Lesley   +6 more
core   +2 more sources

Cerebral haemodynamic responses to inspiratory muscle work

Experimental Physiology, EarlyView.
Abstract Fatiguing inspiratory work has been shown to evoke a sympathetically mediated reflex that has systemic cardiovascular consequences, including increases in heart rate and blood pressure and a decrease in resting limb vascular conductance. Moreover, the response to this reflex appears to be attenuated in females compared with males.
Andrew H. Ramsook, Morgan A. Hughes, Wyatt W. Pruter, Kevin L. Webb, Ali Ataie, Chad C. Wiggins, Gabrielle A. Dillon, Sarah E. Baker, Michael J. Joyner   +8 more
wiley   +1 more source

Automated Signal Quality Assessment for rPPG: A Pulse-by-Pulse Scoring Method Designed Using Human Labelling

Applied Sciences
Reliable analysis of remote photoplethysmography (rPPG) signals depends on identifying physiologically plausible pulses. Traditional approaches rely on clustering self-similar pulses, which can discard valid variability.
Lieke Dorine van Putten, Aristide Jun Wen Mathieu, Simon Wegerif   +2 more
doaj   +1 more source

Estimating Carotid Pulse and Breathing Rate from Near-infrared Video of the Neck

, 2018
Objective: Non-contact physiological measurement is a growing research area that allows capturing vital signs such as heart rate (HR) and breathing rate (BR) comfortably and unobtrusively with remote devices.
Chen, Weixuan, Hernandez, Javier, Picard, Rosalind W.   +2 more
core   +1 more source