Results 51 to 60 of about 12,927 (254)

Relationships Between Lateral Ventricle Size, Cerebrospinal Fluid Dynamics, and Aqueductal Resistance in Young Healthy Adults

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Ventricular enlargement and abnormal cerebrospinal fluid (CSF) circulation are closely associated in communicating hydrocephalus (NPH), yet their causal relationship remains unclear. Studying healthy populations may help clarify these mechanisms.
Pan Liu, Jiachen Xie, Kimi Owashi, Yann Attekeble, Jean‐Marc Constans, Cyrille Capel, Olivier Balédent   +6 more
wiley   +1 more source

Bayesian Model Search for Nonstationary Periodic Time Series [PDF]

, 2019
We propose a novel Bayesian methodology for analyzing nonstationary time series that exhibit oscillatory behaviour. We approximate the time series using a piecewise oscillatory model with unknown periodicities, where our goal is to estimate the change ...
Fiecas, Mark, Finkenstädt, Bärbel, Hadj-Amar, Beniamino, Huckstepp, Robert, Levi, Francis   +4 more
core   +2 more sources

Respiratory pattern, thoracoabdominal motion and ventilation in chronic airway obstruction

Monaldi Archives for Chest Disease, 2016
Background. Patients with chronic obstructive pulmonary disease (COPD) present abnormal respiratory mechanics, but its relation to ventilation variables at rest is not fully understood. Methods.
M. Fernandes, A. Cukier, N. Ambrosino, J.J. Leite, M.I. Zanetti Feltrim   +4 more
doaj   +1 more source

Effect of respiratory-induced intensity variations on finger SpO(2) measurements in volunteers [PDF]

, 2013
Photoplethysmographic (PPG) signals were recorded from the fingers of 16 healthy volunteers with periods of timed and forced respiration. The aim of this pilot study was to compare estimations of arterial oxygen saturation (SpO2) recorded using a ...
Belhaj, A., Kyriacou, P. A., Langford, R. M., Phillips, J. P.   +3 more
core   +1 more source

Ageing reveals the latent effects of early life stress on respiratory and metabolic function in female rats: Novel insights into the sex‐specific origins of sleep apnoea

Experimental Physiology, EarlyView.
Abstract Sleep apnoea (SA) is ∼2 times more prevalent in men than women. However, this changes at menopause as the occurrence of SA increases and matches that of men. Menopause is a natural process, but it remains unclear why SA emerges only in a subpopulation of ageing women.
Danuzia Ambrozio‐Marques, Loralie Mei Guay, Alicia A. Koogler, Tim D. Ostrowski, Richard Kinkead   +4 more
wiley   +1 more source

Comparison of activity and fatigue of the respiratory muscles and pulmonary characteristics between post-polio patients and controls: A pilot study. [PDF]

PLoS ONE, 2017
To compare pulmonary function measures, maximal respiratory pressure and fatigue of respiratory muscles between patients with Post-Polio Syndrome (PPS) and controls.Cross-sectional study.Patients with PPS (N = 12; age 62.1±11.6 years) able to walk for 6 ...
David Shoseyov, Tali Cohen-Kaufman, Isabella Schwartz, Sigal Portnoy   +3 more
doaj   +1 more source

Quantifying microvascular responses to local heating using optical coherence tomography: Comparison between skin sites and sex differences

Experimental Physiology, EarlyView.
Summary of the study design, metholodgy, results and conclusions. Abstract Due to a lack of technical capacity to directly visualise and quantify microvessels in the skin, little is known regarding regional and/or sex differences. We compared diameter, velocity, flow and density at four regional sites using a novel optical coherence tomography (OCT ...
Juliene G. Costa, Kristanti W. Wigati, Louise H. Naylor, Helen Jones, Robert A. McLaughlin, Daniel J. Green   +5 more
wiley   +1 more source

Speckle Plethysmograph-Based Blood Pressure Assessment

Technologies
Continuous non-invasive blood pressure (CNBP) monitoring is of the utmost importance in detecting and managing hypertension, a leading cause of death in the United States.
Floranne T. Ellington, Anh Nguyen, Mao-Hsiang Huang, Tai Le, Bernard Choi, Hung Cao   +5 more
doaj   +1 more source

New electrical plethysmograph monitors cardiac output [PDF]

, 1968
Four-electrode impedance plethysmograph measures ventricular stroke volume of cardiac output of humans.
Kubicek, W. B., Patterson, R. P., Witsoe, D. A.   +2 more
core   +1 more source

Evaluation of a combined reflectance photoplethysmography and laser Doppler flowmetry surface probe [PDF]

, 2013
Photoplethysmographic (PPG) signals were recorded from the fingers of 16 healthy volunteers with periods of timed and forced respiration. The aim of this pilot study was to compare estimations of arterial oxygen saturation (SpO2) recorded using a ...
Abdollahi, Z., Kyriacou, P. A., Phillips, J. P.   +2 more
core   +1 more source