Results 101 to 110 of about 24,406 (238)

Classification of morphologic changes in photoplethysmographic waveforms

Current Directions in Biomedical Engineering, 2016
An ever increasing number of research is examining the question to what extent physiological information beyond the blood oxygen saturation could be drawn from the photoplethysmogram.
Tigges Timo, Music Zenit, Pielmus Alexandru, Klum Michael, Feldheiser Aarne, Hunsicker Oliver, Orglmeister Reinhold   +6 more
doaj   +1 more source

Estimation of respiratory rate from motion contaminated photoplethysmography signals incorporating accelerometry

Healthcare Technology Letters, 2018
Estimation of respiratory rate (RR) from photoplethysmography (PPG) signals has important applications in the healthcare sector, from assisting doctors onwards to monitoring patients in their own homes. The problem is still very challenging, particularly
Delaram Jarchi, Peter Charlton, Peter Charlton, Marco Pimentel, Alex Casson, Lionel Tarassenko, David A. Clifton   +6 more
doaj   +1 more source

Investigation of Lower-limb Tissue Perfusion during Loading [PDF]

, 2002
An extant tissue indentor used for amputee residual limb tissue indentation studies was modified to include laser Doppler flowmetry (LDF) to enable measurement of tissue perfusion during indentation.
Silver-Thorn, Barbara
core   +1 more source

Predict Daily Life Stress based on Heart Rate Variability [PDF]

, 2020
Department of Human Factors EngineeringThe purpose of this study is to investigate the feasibility of predicting a daily mental stress level from analyzing Heart Rate Variability (HRV) by using a Photoplethysmography (PPG) sensor which is integrated in ...
Park, Jongwoo
core  

Profiling the sleep architecture of ageing adults using a seven‐state continuous‐time Markov model

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Sleep is a complex biological process regulated by networks of neurons and environmental factors. As one falls asleep, neurotransmitters from sleep–wake regulating neurones work in synergy to control the switching of different sleep states throughout the night. As sleep disorders or underlying neuropathology can manifest as irregular switching,
Jonathon Jacobs, Caitlin E. Martin, Bernard Fuemmeler, Shanshan Chen   +3 more
wiley   +1 more source

MULTIWAVELENGTH PHOTOPLETHYSMOGRAPHY SYSTEM

Bulletin of Kyiv Polytechnic Institute. Series Instrument Making
Photoplethysmography (PPG) is a promising technology for assessing the cardiovascular system's condition due to its ability to analyze changes in blood volume within the microvascular bed. Beyond standard parameters such as heart rate and blood oxygen saturation, the pulse wave shape in PPG signals contains additional valuable information that can be ...
Dmytro Velyhotskyi, Serhii Duha, Serhii Mamilov   +2 more
openaire   +3 more sources

Evaluating the Effect of a Sleep Prehabilitation Intervention in Patients Awaiting Elective Surgery: Protocol for a Single‐Blind Randomised Trial

Journal of Sleep Research, EarlyView.
ABSTRACT Adequate sleep health is critical for surgical recovery. Disrupted sleep can impede wound healing and cognitive performance and contribute to poor surgical outcomes. Preoperative intervention aimed at improving surgical outcomes is often referred to as prehabilitation and commonly uses exercise, nutrition or psychological intervention.
Daniel Sibley, Ian Randall, S. Nicole Culos‐Reed, P. Maxwell Slepian, Mandeep Singh, Daniel Santa Mina   +5 more
wiley   +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

Butterworth Filtering at 500 Hz Optimizes PPG-Based Heart Rate Variability Analysis for Wearable Devices: A Comparative Study

Sensors
Photoplethysmography (PPG)-based heart rate variability (HRV) offers a cost-effective alternative to electrocardiography (ECG) for autonomic monitoring in wearable devices. We optimized signal processing on a 16-bit microcontroller by comparing 4th-order
Nagima Abdrasulova, Milana Aleksanyan, Min Ju Kim, Jae Mok Ahn   +3 more
doaj   +1 more source

Comparison between Electrocardiographic and Earlobe Pulse Photoplethysmographic Detection for Evaluating Heart Rate Variability in Healthy Subjects in Short- and Long-Term Recordings

Sensors, 2018
Heart rate variability (HRV) is commonly used to assess autonomic functions and responses to environmental stimuli. It is usually derived from electrocardiographic signals; however, in the last few years, photoplethysmography has been successfully used ...
Basilio Vescio, Maria Salsone, Antonio Gambardella, Aldo Quattrone   +3 more
doaj   +1 more source