Results 211 to 220 of about 15,545,791 (242)
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2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011
We compared pulse arrival time (PAT) and pulse transit time (PTT) in terms of their ability to track diastolic pressure (DP). We performed the comparison using high fidelity, invasive arterial waveforms recorded from six dogs during multiple interventions. On average, DP ranged from 40 to 106 mmHg and therefore varied widely.
Guanqun Zhang +3 more
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We compared pulse arrival time (PAT) and pulse transit time (PTT) in terms of their ability to track diastolic pressure (DP). We performed the comparison using high fidelity, invasive arterial waveforms recorded from six dogs during multiple interventions. On average, DP ranged from 40 to 106 mmHg and therefore varied widely.
Guanqun Zhang +3 more
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Estimation of pulse transit time using time delay estimation techniques
2011 4th International Conference on Biomedical Engineering and Informatics (BMEI), 2011The pulse wave propagation is the important electromechanical characteristics of biomedical signals. Conventionally the pulse propagation features are extracted by estimating the propagation time delay between two points called pulse transit time(PTT). The PTT estimation is based on the phase analysis of the cross power spectrum and bispectrum between ...
S. T. Veerabhadrappa +2 more
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Videoplethysmographic Measurements of Pulse Wave Velocity and Pulse Transit Time
2020Oxygen-rich blood has different absorption properties than de-oxygenated one. For that reason during the heartbeat there are slight changes in colour of human skin which are invisible to an eye but detectable for the colour video camera after applying motion picture processing algorithms.
Anna Pająk, Piotr Augustyniak
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Pulse transit time extraction from Seismocardiogram and its relationship with pulse pressure
2015 Computing in Cardiology Conference (CinC), 2015In this research Seismocardiogram (SCG) signal was used for timing the proximal pulse while pulse-plethysmogram (PPG) was used for timing the dorsal pulse for computing pulse transit time (PTT). Lower body negative pressure (LBNP) was applied for gradually reducing the pulse pressure in 9 subjects.
Ajay K. Verma +3 more
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Pulse transit time in paediatric respiratory sleep studies
Medical Engineering & Physics, 2006Pulse transit time (PTT) has emerged over the recent decades as a simple and non-invasive measure to quantify inspiratory effort changes in adults with sleep disordered breathing (SDB). Hence, this shows promise to be an effective screening tool for the paediatrics.
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Transit-time considerations in short-pulse photoconductivity
Journal of Applied Physics, 1980Little attention has been paid so far on the transit-time effects in the short-pulse photoconductivity. This paper discusses the effect of transit time on the time evolution of carriers in short-pulse photoconductivity. This is likely to effect the rise time of a fast-switching device.
V. K. Mathur, Chi H. Lee
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Pulse transit time and heart rate variability in sleep staging
2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2016This paper presents a new and robust algorithm for detection of sleep stages by using the lead I of the Electrocardiography (ECG) and a fingertip Photoplethysmography (PPG) sensor, validated using multiple overnight PSG recordings consisting of 20 human subjects (9 insomniac and 11 healthy).
Sobhan Salari Shahrbabaki +3 more
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Pulse Transit Time Measurement Using Bioimpedance
2019Cardiovascular disease is a factor that leads to mortality in the populations of industrialized countries, being the large arteries pathology the main cause of morbidity and death from such disease. A functional characteristic of arteries that is changed under pathological conditions is their wall stiffness. Early diagnosis of such arterial alterations
Andrei L. A. Pires, Marcio N. Souza
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An investigation on pulse transit time in respiratory sleep studies for infants
Journal of Medical Engineering & Technology, 2008The main objective of this study was to assess the capability of pulse transit time (PTT) to identify obstructive and/or central apnoeas from normal breathing patterns in sleeping infants. Clinical trials were conducted with PTT being monitored as an adjunct measure in routine overnight polysomnography (PSG) studies.
J Y A, Foo, C S, Lim
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[Blood pressure measurement using pulse transit time].
Nederlands tijdschrift voor geneeskunde, 2019Blood pressure has been measured with a cuff for over a 100 years. Recently, various devices and smart phone applications that measure blood pressure without a cuff using pulse transit time (PTT) have become available. These measurements are based on the inverse relationship between blood pressure and PTT. PTT constitutes the time delay between the QRS
Hahnen, C., Helmond, N. van
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