Results 31 to 40 of about 24,406 (238)

Methods and systems for extracting venous pulsation and respiratory information from photoplethysmographs [PDF]

open access: yes, 2019
A system and method for separating a venous component and an arterial component from a red signal and an infrared signal of a PPG sensor is provided.
Nourani, Mehrdad, Yousefi, Rasoul
core   +1 more source

Cuffless Single-Site Photoplethysmography for Blood Pressure Monitoring [PDF]

open access: yes, 2020
One in three adults worldwide has hypertension, which is associated with significant morbidity and mortality. Consequently, there is a global demand for continuous and non-invasive blood pressure (BP) measurements that are convenient, easy to use, and ...
Abbott, D.   +15 more
core   +3 more sources

ASSESSMENT OF CUTANEOUS BLOOD FLOW IN LOWER EXTREMITIES BY IMAGING PHOTOPLETHYSMOGRAPHY METHOD [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2019
Subject of Research. The paper presents effective application of the novel imaging photoplethysmography method for receiving data on reaction of peripheral blood flow in lower extremities on venous occlusion. Method.
Valeriy V. Zaytsev   +2 more
doaj   +1 more source

Sex features of cutaneous microvasculature in healthy working-age people

open access: yesКардиоваскулярная терапия и профилактика, 2022
Aim. To study sex characteristics of cutaneous microvascular structure and function in a cohort of healthy working-age people without cardiovascular diseases.Material and methods. The study included 35 healthy men (42±4 years) and 34 women (41 ±5 years).
K. V. Omelyanenko   +6 more
doaj   +1 more source

A review of machine learning techniques in photoplethysmography for the non-invasive cuff-less measurement of blood pressure [PDF]

open access: yes, 2020
Hypertension or high blood pressure is a leading cause of death throughout the world and a critical factor for increasing the risk of serious diseases, including cardiovascular diseases such as stroke and heart failure.
El-Hajj, C., Kyriacou, P. A.
core   +1 more source

Alterations in electrodermal activity and cardiac parasympathetic tone during hypnosis [PDF]

open access: yes, 2015
Exploring autonomic nervous system (ANS) changes during hypnosis is critical for understanding the nature and extent of the hypnotic phenomenon and for identifying the mechanisms underlying the effects of hypnosis in different medical conditions.
Kekecs, Z, Szekely, A, Varga, K
core   +1 more source

Photoplethysmography Detection of Overreaching

open access: yesMedicine & Science in Sports & Exercise, 2019
ABSTRACT Introduction Detecting the onset of functional overreaching (FOR) or nonfunctional overreaching in endurance athletes is of prior importance to ensure reactive amendment of the scheduled training program. The objective of this study was to assess photoplethysmography (PPG) in overloaded athletes and test ...
Nicolas, Bourdillon   +2 more
openaire   +3 more sources

Design of an oximeter based on LED-LED configuration and FPGA technology [PDF]

open access: yes, 2013
sensor
Allen   +11 more
core   +3 more sources

A Multilayer Monte Carlo Model for the Investigation of Optical Path and Penetration Depth at Different Perfusion States of the Colon [PDF]

open access: yes, 2019
There is a great interest in monitoring the oxygen supply delivered to the colon. Insufficient oxygen delivery may lead to hypoxia, sepsis, multiorgan dysfunction and death.
Chatterjee, S.   +3 more
core   +1 more source

The 2023 wearable photoplethysmography roadmap

open access: yesPhysiological Measurement, 2023
Abstract Photoplethysmography is a key sensing technology which is used in wearable devices such as smartwatches and fitness trackers. Currently, photoplethysmography sensors are used to monitor physiological parameters including heart rate and heart rhythm, and to track activities like sleep and exercise.
Charlton, Peter H   +50 more
openaire   +6 more sources

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