Results 111 to 120 of about 24,406 (238)

Hypoxic Burden in Children With Sleep‐Disordered Breathing: Determinants and Correlates

Journal of Sleep Research, EarlyView.
ABSTRACT Hypoxic burden (HB) is an emerging metric for quantifying intermittent hypoxia associated with sleep apnea, offering potential advantages over traditional measures such as the apnea‐hypopnea index (AHI). This study evaluated the distribution and clinical significance of non‐respiratory event‐specific HB in children and adolescents with ...
Plamen Bokov, Benjamin Dudoignon, Christophe Delclaux   +2 more
wiley   +1 more source

Photoplethysmogram (PPG)-Based Biometric Identification Using 2D Signal Transformation and Multi-Scale Feature Fusion

Sensors
Using Photoplethysmogram (PPG) signals for identity recognition has been proven effective in biometric authentication. However, in real-world applications, PPG signals are prone to interference from noise, physical activity, diseases, and other factors ...
Yuanyuan Xu, Zhi Wang, Xiaochang Liu
doaj   +1 more source

Optical Fibre-Based Pulse Oximetry Sensor with Contact Force Detection

Sensors, 2018
A novel optical sensor probe combining monitoring of blood oxygen saturation (SpO2) with contact pressure is presented. This is beneficial as contact pressure is known to affect SpO2 measurement.
Chong Liu, Ricardo Correia, Hattan Khaled Ballaji, Serhiy Korposh, Barrie R. Hayes-Gill, Stephen P. Morgan   +5 more
doaj   +1 more source

Analysis of Noncontact Heartbeat Detection [PDF]

, 2015
IEEE國際20150606~20150608電子版Y台灣/台北 ...
Lee, Yang-Han, Tseng,Hsien-Wei
core  

Screens, Teens, and Sleep: Is the Impact of Nighttime Screen Use on Sleep Driven by Physiological Arousal?

Journal of Sleep Research, EarlyView.
ABSTRACT Few studies have objectively measured both screens and sleep in real‐world settings. This study uses repeated measures to assess heart rate during evening screen use, providing new insights into how these behaviours relate to adolescent sleep. Screen use was recorded using wearable cameras over four nights in 70 youth (37% indigenous Māori, 42%
Kim A. Meredith‐Jones, Jillian J. Haszard, Barbara C. Galland, Shay‐Ruby Wickham, Bradley J. Brosnan, Takiwai Russell‐Camp, Rachael W. Taylor   +6 more
wiley   +1 more source

Filter and Sampling Rate Optimization for PPG-Based Detection of Autonomic Dysfunction: An ECG-guided Approach

Measurement Science Review
Photoplethysmography (PPG) is well suited for wearable health applications, but has a lower frequency spectrum than electrocardiography (ECG) and is more affected by motion artifacts.
Kao Yi-Hui, Shahmirzadi Danyal, Hsieh Sung-Tsang, Wang Wen-Fong   +3 more
doaj   +1 more source

Effects of the angle of head‐down tilt on dynamic cerebral autoregulation during combined exposure to cephalad fluid shift and mild hypercapnia

Experimental Physiology, EarlyView.
Abstract Astronauts experience combined exposure to a cephalad fluid shift and mild hypercapnia during space missions, potentially contributing to health problems. Such combined exposure may weaken dynamic cerebral autoregulation. The magnitude of cephalad fluid shift varies between individuals, and dynamic cerebral autoregulation may be affected more ...
Tomokazu Kato, Yojiro Ogawa, Ken‐ichi Iwasaki   +2 more
wiley   +1 more source

Use of zero-frequency resonator for automatically detecting systolic peaks of photoplethysmogram signal

Healthcare Technology Letters, 2019
This work investigates the application of zero-frequency resonator (ZFR) for detecting systolic peaks of photoplethysmogram (PPG) signals. Based on the authors’ studies, they propose an automated noise-robust method, which consists of the central ...
Simhadri Vadrevu, M. Sabarimalai Manikandan   +1 more
doaj   +1 more source

Blood flow restriction: The acute effects of body tilting and reduced gravity analogues on limb occlusion pressure

Experimental Physiology, EarlyView.
Abstract Blood flow restriction (BFR) has been identified as a potential countermeasure to mitigate physiological deconditioning during spaceflight. Guidelines recommend that tourniquet pressure be prescribed relative to limb occlusion pressure (LOP); however, it is unclear whether body tilting or reduced gravity analogues influence LOP.
Patrick Swain, Nick Caplan, Luke Hughes
wiley   +1 more source

Effects of Wrist Sensor Placement on PPG Signal Quality

Current Directions in Biomedical Engineering
Photoplethysmography (PPG) is a key sensing modality in wearable devices for monitoring cardiovascular parameters. Despite widespread use, wrist-based PPG measurements often suffer from signal degradation due to anatomical variability and suboptimal ...
Meier Dominik, Bandel Torsten, Baili Asrar, Dömer Benno   +3 more
doaj   +1 more source