Results 1 to 10 of about 97,976 (134)

Measurement of pulse transit time using ultra-wideband radar. [PDF]

Technol Health Care, 2021
BACKGROUND: The pulse transit time is an important factor that can be used to estimate the blood pressure indirectly. In many studies, pressures in the artery near and far from the heart are measured or the electrocardiogram and photoplethysmography are used to calculate the pulse transit time.
Cho HS, Park YJ.
europepmc   +5 more sources

Comparison of noninvasive pulse transit time estimates as markers of blood pressure using invasive pulse transit time measurements as a reference. [PDF]

Physiol Rep, 2016
Pulse transit time (PTT) measured as the time delay between invasive proximal and distal blood pressure (BP) or flow waveforms (invasive PTT [I-PTT]) tightly correlates with BP PTT estimated as the time delay between noninvasive proximal and distal arterial waveforms could therefore permit cuff-less BP monitoring. A popular noninvasive PTT estimate for
Gao M, Olivier NB, Mukkamala R.
europepmc   +3 more sources

A review of machine learning techniques in photoplethysmography for the non-invasive cuff-less measurement of blood pressure [PDF]

, 2020
Hypertension or high blood pressure is a leading cause of death throughout the world and a critical factor for increasing the risk of serious diseases, including cardiovascular diseases such as stroke and heart failure.
El-Hajj, C., Kyriacou, P. A.
core   +1 more source

Pulse transit time: Relationship to blood pressure [PDF]

Behavior Research Methods & Instrumentation, 1978
The relationships between pulse transit time (PTT) and both systolic (SBP) and diastolic blood pressure (DBP) were evaluated in 114 human subjects during rest and stress. PTT was found to covary quite consistently with SBP, but not with DBP, when blood pressure was measured both noninvasively and invasively.
Paul A. Obrist, Kathleen C. Light, James A. McCubbin, J. Stanford Hutcheson, J. Lee Hoffer   +4 more
openaire   +1 more source

Development of tubular cardiovascular phantom system for pulse transit time simulation [PDF]

, 2019
This paper presents on the development of a tubular cardiovascular phantom system to simulate pulse transit time (PTT). The PTT defined as the delay time between two pulses in one cardiac cycle has been shown to be promising method for cuffless ...
Correia, Ricardo, Hayes-Gill, Barrie R., Korposh, Serhiy, P. Morgan, Stephen, Wan Zaki, Wan Suhaimizan   +4 more
core   +1 more source

An assessment of pulse transit time for detecting heavy blood loss during surgical operation [PDF]

, 2012
Copyright @ Wang et al.; Licensee Bentham Open. This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non ...
Anderson ID, Babchenko A, Cabazan-Carraze F, Chan GS, Cheng-Wei Lu, Chien-Hao Wang, Christov II, Dutch J, Gruen RL, Jiann-Shing Shieh, Maysam F Abbod, Middleton PM, Middleton PM, Nitzan M, Obrist PA, Payne RA, R.P Smith J, Sharwood-Smith G, Sigtermans M, Tzu-Yu Lin, Weiss T   +20 more
core   +1 more source

Pulse transit time differential measurement by fiber Bragg grating pulse recorder

Journal of Biomedical Optics, 2015
The present study reports a noninvasive technique for the measurement of the pulse transit time differential (PTTD) from the pulse pressure waveforms obtained at the carotid artery and radial artery using fiber Bragg grating pulse recorders (FBGPR). PTTD is defined as the time difference between the arrivals of a pulse pressure waveform at the carotid ...
Umesh, Sharath, Padma, Srivani, Ambastha, Shikha, Kalegowda, Anand, Asokan, Sundarrajan   +4 more
openaire   +3 more sources

Pulse transit time: an appraisal of potential clinical applications [PDF]

Thorax, 1999
Current techniques for investigating patients with suspected sleep disordered breathing are inadequate. Not only are many of the tests expensive, but they are also cumbersome and many centres require these investigations to be performed in the sleep laboratory. At the heart of the problem is the difficulty in identifying and quantifying the spectrum of
R P, Smith, J, Argod, J L, Pépin, P A, Lévy   +3 more
openaire   +2 more sources

Transient dynamics of molecular devices under step-like pulse bias [PDF]

, 2009
We report first principles investigation of time-dependent current of molecular devices under a step-like pulse.Our results show that although the switch-on time of the molecular device is comparable to the transit time, much longer time is needed to ...
Wang, Bin, Wang, Jian, Xing, Yanxia, Zhang, Lei   +3 more
core   +2 more sources

Effects of Enflurane on Pulse Transit Time

Korean Journal of Anesthesiology, 2004
Background: In Anesthetic state, many hemodynamic parameters including blood pressure, heart rate and arterial compliance are changed. Moreover pulse transit time (PTT) is influenced by heart rate, blood pressure changes, and the compliance of the arteries. Methods: In this study, we investigated PTT changes in patients under enflurane anesthesia.
Seong Wan Baik, Yeong Seo Park, Soo Young Yae, Gye Rock Jeon, Byeong Cheol Choi, Dong Keun Jung   +5 more
openaire   +1 more source