Results 21 to 30 of about 24,406 (238)

Past, Present, and Future of Multisensory Wearable Technology to Monitor Sleep and Circadian Rhythms

Frontiers in Digital Health, 2021
Movement-based sleep-wake detection devices (i.e., actigraphy devices) were first developed in the early 1970s and have repeatedly been validated against polysomnography, which is considered the “gold-standard” of sleep measurement.
Matthew R. Lujan, Ignacio Perez-Pozuelo, Ignacio Perez-Pozuelo, Michael A. Grandner   +3 more
doaj   +1 more source

Protocol of the SOMNIA project : an observational study to create a neurophysiological database for advanced clinical sleep monitoring [PDF]

, 2019
Introduction Polysomnography (PSG) is the primary tool for sleep monitoring and the diagnosis of sleep disorders. Recent advances in signal analysis make it possible to reveal more information from this rich data source.
Arsenali, Bruno, Bergmans, Jan W. M., Fonseca, Pedro, Haakma, Reinder, Hoondert, Bertram, Krijn, Roy, Lauwerijssen, Coen, Leufkens, Tim R., Maass, Henning, Overeem, Sebastiaan, Pevernagie, Dirk, Pillen, Sigrid, van den Heuvel, Leonie, van Dijk, Johannes P., van Gilst, Merel M., van Sloun, Ruud J. G., Vandenbussche, Nele   +16 more
core   +2 more sources

Improved U-Net Model to Estimate Cardiac Output Based on Photoplethysmography and Arterial Pressure Waveform

Sensors, 2023
We aimed to estimate cardiac output (CO) from photoplethysmography (PPG) and the arterial pressure waveform (ART) using a deep learning approach, which is minimally invasive, does not require patient demographic information, and is operator-independent ...
Xichen Xu, Qunfeng Tang, Zhencheng Chen
doaj   +1 more source

Photoplethysmography for Quantitative Assessment of Sympathetic Nerve Activity (SNA) During Cold Stress [PDF]

, 2019
The differences in the degree of sympathetic nerve activity (SNA) over cutaneous blood vessels, although known to be more prominent in the periphery than the core vasculature, has not been thoroughly investigated quantitatively.
Ainslie, Anderson, Appelhans, Billman, Budidha, Budidha, Budidha, Budidha, Burgess, Busija, Daanen, Deng, Eigsti, Esler, Flavahan, Folk, Gordon, Guild, Hart, Hernandez, Hodges, Kaciuba-Uscilko, Korhonen, Kyriacou, Nitzan, Nitzan, Nitzan, Pagani, Penzel, Ramchandra, Reed, Seravalle, Shelley, Silverthorn, Sinski, Smith, Stocks, Tansey, ter Laan, Thayer, Vallbo, Van Vliet, Venema, Wehrwein   +43 more
core   +2 more sources

Evaluating Visual Photoplethysmography Method

Cureus, 2021
ABSTRACTRegular monitoring of common physiological signs, including heart rate, blood pressure, and oxygen saturation, can be an effective way to either prevent or detect many kinds of chronic conditions. In particular, cardiovascular diseases (CVDs) are a worldwide concern.
Talukdar, Debjyoti, de Deus, Luis Felipe, Sehgal, Nikhil   +2 more
openaire   +2 more sources

Photoplethysmography-Based Pulse Rate Variability and Haemodynamic Changes in the Absence of Heart Rate Variability: An In-Vitro Study

Applied Sciences, 2022
Pulse rate variability (PRV), measured from pulsatile signals such as the photoplethysmogram (PPG), has been largely used in recent years as a surrogate of heart rate variability (HRV), which is measured from electrocardiograms (ECG).
Elisa Mejía-Mejía, Panicos A. Kyriacou
doaj   +1 more source

Green textile dyeing process by using natural dyes: a review [PDF]

, 2020
In the textile industry, up to 200,000 tons of dyes are lost to effluents every year during the dyeing and finishing operations, due to the inefficiency of the dyeing process. Today, the textile industry used average six hundred dyes and chemical for the
Mahmood, Salwa, Nasir, Siti Hana, Sazali, Nurul Aqilah, Wan Yusof, Wan Muhamad Alif   +3 more
core   +1 more source

Evaluation of Fluid Responsiveness: Is Photoplethysmography a Noninvasive Alternative?

Anesthesiology Research and Practice, 2012
Background. Goal-directed fluid therapy reduces morbidity and mortality in various clinical settings. Respiratory variations in photoplethysmography are proposed as a noninvasive alternative to predict fluid responsiveness during mechanical ventilation ...
Lars Prag Antonsen, Knut Arvid Kirkebøen   +1 more
doaj   +1 more source

Distal Pulse Measurement Provides Statistical, but not Dynamical, Features of the Central Pulse [PDF]

Известия Саратовского университета. Новая серия: Физика, 2020
Heart rate variability is recognized in medicine as an important prognostic factor. It is generally believed that the temporal characteristics of the pulse signal do not depend on the measurement point.
Choi, Marya Olegovna, Merkulova, Kseniya Olegovna, Postnov, Dmitry Engelevich   +2 more
doaj   +1 more source

Estimating Blood Pressure from Photoplethysmogram Signal and Demographic Features using Machine Learning Techniques

, 2020
Hypertension is a potentially unsafe health ailment, which can be indicated directly from the Blood pressure (BP). Hypertension always leads to other health complications. Continuous monitoring of BP is very important; however, cuff-based BP measurements
Chowdhury, Moajjem Hossain, Chowdhury, Muhammad E. H., Khandakar, Amith, Mahbub, Zaid B, Reaz, Mamun Bin Ibne, Shuzan, Md Nazmul Islam, Uddin, M. Monir   +6 more
core   +1 more source