Results 81 to 90 of about 24,406 (238)

Power spectral density-based nearinfrared sub-band detection for noninvasive blood glucose prediction in both in-vitro and in-vivo studies [PDF]

Journal of Innovative Optical Health Sciences, 2018
Diabetes is a widespread and serious disease and noninvasive measurement has been in high demand. To address this problem, a power spectral density-based method was offered for determining glucose sensitive sub-bands in the nearinfrared (NIR) spectrum ...
Ibrahim Akkaya, Erman Selim, Mert Altintas, Mehmet Engin   +3 more
doaj   +1 more source

An Interpretable Machine Vision Approach to Human Activity Recognition using Photoplethysmograph Sensor Data [PDF]

, 2018
The current gold standard for human activity recognition (HAR) is based on the use of cameras. However, the poor scalability of camera systems renders them impractical in pursuit of the goal of wider adoption of HAR in mobile computing contexts ...
Brophy, Eoin, Smeaton, Alan F., Veiga, José Juan Dominguez, Wang, Zhengwei, Ward, Tomas E.   +4 more
core   +1 more source

Comparison of methods for determining pulse arrival time from Doppler and photoplethysmography signals [PDF]

, 2014
The aim of this study was to compare three foot-finding methods applied to ultrasound Doppler and photoplethysmographic (PPG) signals: maximum 1st derivative, maximum 2nd derivative and an 'intersecting tangents' method.
Kyriacou, P. A., Phillips, J. P.
core   +1 more source

Intestinal perfusion monitoring using photoplethysmography [PDF]

Journal of Biomedical Optics, 2013
In abdominal trauma patients, monitoring intestinal perfusion and oxygen consumption is essential during the resuscitation period. Photoplethysmography is an optical technique potentially capable of monitoring these changes in real time to provide the medical staff with a timely and quantitative measure of the adequacy of resuscitation.
Tony J, Akl, Mark A, Wilson, M Nance, Ericson, Gerard L, Coté   +3 more
openaire   +2 more sources

Detection of focal impaired awareness seizures using a biometric shirt

Epilepsia Open, EarlyView.
Abstract Objective In recent years, seizure detection using wearable technology has gained significant attention in research. Most studies, however, have focused on detecting generalized or focal to bilateral tonic–clonic seizures. This study evaluates the feasibility of using a biometric shirt to detect focal impaired awareness seizures (FIAS) by ...
Jérôme St‐Jean, Oumayma Gharbi, Dènahin Hinnoutondji Toffa, Thi Phuoc Yen Tran, Manon Robert, Dang Khoa Nguyen, Elie Bou Assi   +6 more
wiley   +1 more source

A Comparative Study Between ECG- and PPG-Based Heart Rate Sensors for Heart Rate Variability Measurements: Influence of Body Position, Duration, Sex, and Age

Sensors
This study evaluated the validity of a photoplethysmography (PPG)-based sensor (Polar OH1) for measuring heart rate variability (HRV), compared to an electrocardiography (ECG)-based reference device (Polar H10), considering body position (supine vs ...
Alexandre Coste, Geoffrey Millour, Christophe Hausswirth   +2 more
doaj   +1 more source

Baroreflex Sensitivity Measured by Pulse Photoplethysmography

Frontiers in Neuroscience, 2019
Novel methods for assessing baroreflex sensitivity (BRS) using only pulse photoplethysmography (PPG) signals are presented. Proposed methods were evaluated with a data set containing electrocardiogram (ECG), blood pressure (BP), and PPG signals from 17 ...
Jesús Lázaro, Jesús Lázaro, Jesús Lázaro, Eduardo Gil, Eduardo Gil, Michele Orini, Pablo Laguna, Pablo Laguna, Raquel Bailón, Raquel Bailón   +9 more
doaj   +1 more source

Perfusion Changes at the Forehead Measured by Photoplethysmography during a Head-Down Tilt Protocol [PDF]

, 2019
Photoplethysmography (PPG) signals from the forehead can be used in pulse oximetry as they are less affected by vasoconstriction compared to fingers.
Abay, T., Kyriacou, P. A., Shafqat, K.
core   +1 more source

Vascular dysfunction in women with recurrent pregnancy loss: Possible association with antiphospholipid antibodies

International Journal of Gynecology &Obstetrics, Volume 169, Issue 1, Page 206-214, April 2025.
Abstract Objective Antiphospholipid antibodies (aPL) are recognized to have a pivotal role in recurrent pregnancy loss (RPL) and cardiovascular disease. Therefore, we assessed the vascular function of women with RPL and examined the association with each type of aPL.
Titi Yang, Emi Okada, Maho Todoroki, Siyu Liu, Rukmali Athurupana, Kumie Kataoka, Chiaki Kashino, Takashi Mitsui, Toru Hasegawa, Yasuhiko Kamada, Hisashi Masuyama, Mikiya Nakatsuka   +11 more
wiley   +1 more source

Sympatho‐Excitation in Pulmonary Hypertension: The Potential Role of Pulmonary Arterial Baroreceptors: An Acute Physiologic Intervention Study

Respirology, EarlyView.
Pulmonary arterial baroreceptors reflexively stimulate sympathetic nerve activity (SNA) in response to elevated pulmonary artery pressure and distension. In pulmonary hypertension patients, changes in muscle SNA were proportional to changes in pulmonary haemodynamics following nebulised iloprost.
Michael J. Plunkett, Ana L. C. Sayegh, Robert A. Lewis, Tanya J. McWilliams, Sasiharan Sithamparanathan, Julian F. R. Paton, James P. Fisher   +6 more
wiley   +1 more source