Contours of pressure and flow waves in arteries

2011 ◽  
pp. 239-268
Keyword(s):  
Pressure And Flow Waves

Mechanism of pulmonary venous pressure and flow waves

1999 ◽  
Vol 14 (2) ◽  
pp. 67-71 ◽  
Author(s):  
L. R. Hellevik ◽  
P. Segers ◽  
N. Stergiopulos ◽  
F. Irgens ◽  
P. Verdonck ◽  
...  
Keyword(s):  
Venous Pressure ◽  
Pressure And Flow Waves

scholarly journals Arterial pulse wave propagation across stenoses and aneurysms: assessment of one-dimensional simulations against three-dimensional simulations and in vitro measurements

2021 ◽  
Vol 18 (177) ◽  
Author(s):  
Weiwei Jin ◽  
Jordi Alastruey
Keyword(s):  
Abdominal Aorta ◽  
Three Dimensional ◽  
Experimental Models ◽  
Arterial Blood Flow ◽  
Future Research ◽  
One Dimensional ◽  
Arterial Blood ◽  
Mean Square Errors ◽  
Pressure And Flow Waves

One-dimensional (1-D) arterial blood flow modelling was tested in a series of idealized vascular geometries representing the abdominal aorta, common carotid and iliac arteries with different sizes of stenoses and/or aneurysms. Three-dimensional (3-D) modelling and in vitro measurements were used as ground truth to assess the accuracy of 1-D model pressure and flow waves. The 1-D and 3-D formulations shared identical boundary conditions and had equivalent vascular geometries and material properties. The parameters of an experimental set-up of the abdominal aorta for different aneurysm sizes were matched in corresponding 1-D models. Results show the ability of 1-D modelling to capture the main features of pressure and flow waves, pressure drop across the stenoses and energy dissipation across aneurysms observed in the 3-D and experimental models. Under physiological Reynolds numbers ( Re ), root mean square errors were smaller than 5.4% for pressure and 7.3% for the flow, for stenosis and aneurysm sizes of up to 85% and 400%, respectively. Relative errors increased with the increasing stenosis and aneurysm size, aneurysm length and Re , and decreasing stenosis length. All data generated in this study are freely available and provide a valuable resource for future research.

P11.6 TOWARDS AORTIC PRESSURE AND FLOW WAVES MODELLING IN THE CLINIC

2014 ◽  
Vol 8 (4) ◽  
pp. 162
Author(s):  
S. Epstein ◽  
J. Alastruey ◽  
P. Chowienczyk
Keyword(s):  
Aortic Pressure ◽  
Pressure And Flow Waves

Change in Pulsatile Cerebral Arterial Pressure and Flow Waves as a Therapeutic Strategy?

2016 ◽  
pp. 167-170 ◽  
Author(s):  
Mi Ok Kim ◽  
Audrey Adji ◽  
Michael F. O’Rourke ◽  
Alberto P. Avolio ◽  
Peter Smielewski ◽  
...  
Keyword(s):  
Arterial Pressure ◽  
Therapeutic Strategy ◽  
Pressure And Flow Waves

DISTRIBUTED FLOW LEAKAGE IN VISCOELASTIC TUBES: AN EXPERIMENTAL STUDY

2004 ◽  
Vol 04 (02) ◽  
pp. 187-195
Author(s):  
CRAIG J. HOFF ◽  
WEN JEI YANG
Keyword(s):  
Experimental Study ◽  
Wave Transmission ◽  
The Body ◽  
Negligible Effect ◽  
Arterial System ◽  
Series Of Experiments ◽  
Pressure And Flow Waves

Models of the arterial system often consider only the major arteries in the body; smaller arteries are neglected. Along the aorta are many small branches that create, what is in effect, a distributed flow leakage. Distributed flow leakage is known to significantly attenuate pressure and flow waves in rigid tubes. The purpose of this study was to determine the effects of distributed flow leakage on the transmission of pressure and flow waves in viscoelastic tubes. This was accomplished by conducting a series of experiments using latex tubes. The results of the study indicate that distributed flow leakage has a negligible effect on wave transmission in compliant tubes, hence it is reasonable to neglect distributed flow leakage in models of the arterial system.

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