scholarly journals Particle Image Velocimetry Tests on Pediatric 45-cc and 30-cc Ventricle Assist Devices: Effects of Heart Rate on VAD Operation

2017 ◽  
Vol 40 (10) ◽  
pp. 558-562 ◽  
Author(s):  
Dariusz Witkowski ◽  
Damian Obidowski ◽  
Piotr Reorowicz ◽  
Daniel Jodko ◽  
Krzysztof Jozwik
Keyword(s):  
Heart Rate ◽  
Particle Image Velocimetry ◽  
Heart Valves ◽  
Particle Image ◽  
Flow Analysis ◽  
Measuring System ◽  
Heart Rates ◽  
Assist Devices ◽  
Operation Conditions ◽  
Image Velocimetry

Background This study investigated flow analysis inside pediatric ventricle assist devices (VADs) designed and manufactured at the Foundation for Cardiac Surgery Development (FRK), Zabrze, Poland. The main goal of the experiment was to define the minimal heart rate admissible in clinical practice. Methods The flow was directed by mechanical, single-disc valves developed at the Lodz University of Technology, Institute of Turbomachinery in Lodz, Poland. VAD operation conditions under different heart rates were analyzed. Measurements were performed on Religa PED pediatric VADs (45 cm3 and 30 cm3) with a particle image velocimetry (PIV) system. Results Due to the PIV method used, the measurements were made without interference of the measuring system onto the flow structure in the investigated channel, as the measurement procedure is noninvasive. During the investigations conducted in different measurement planes, the majority of the flow volume in the chamber was observable. Conclusions The measurements at different heart rates demonstrated a significant influence of this parameter on the flow nature in the heart ventricle. Additionally, it was found that the heart rate affected the operation of heart valves in the VAD.

scholarly journals AN ATHEROSCLEROTIC CORONARY ARTERY PHANTOM FOR PARTICLE IMAGE VELOCIMETRY

2011 ◽  
Author(s):  
Jean Brunette ◽  
Rosaire Mongrain ◽  
Rosaire Mongrain ◽  
Adrian Ranga ◽  
Adrian Ranga ◽  
...  
Keyword(s):  
Experimental Data ◽  
Particle Image Velocimetry ◽  
Heart Attack ◽  
Computational Models ◽  
Particle Image ◽  
Flow Analysis ◽  
Novel Technique ◽  
Image Velocimetry ◽  
Inflammatory Processes ◽  
Injection Molded

Myocardial infarction, also known as a heart attack, is the single leading cause of death in North America. It results from the rupture of an atherosclerotic plaque, which occurs in response to both mechanical stress and inflammatory processes. In order to validate computational models of atherosclerotic coronary arteries, a novel technique for molding realistic compliant phantom featuring injection-molded inclusions and multiple layers has been developed. This transparent phantom allows for particle image velocimetry (PIV) flow analysis and can supply experimental data to validate computational fluid dynamics algorithms and hypothesis.

Flow analysis of two-dimensional pulsed jets by particle image velocimetry

2001 ◽  
Vol 31 (5) ◽  
pp. 519-532 ◽  
Author(s):  
J. C. Béra ◽  
M. Michard ◽  
N. Grosjean ◽  
G. Comte-Bellot
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Flow Analysis ◽  
Two Dimensional ◽  
Pulsed Jets ◽  
Image Velocimetry

scholarly journals Fluid Dynamic Assessment of Three Polymeric Heart Valves Using Particle Image Velocimetry

2006 ◽  
Vol 34 (6) ◽  
pp. 936-952 ◽  
Author(s):  
Hwa Liang Leo ◽  
Lakshmi Prasad Dasi ◽  
Josie Carberry ◽  
Hélène A. Simon ◽  
Ajit P. Yoganathan
Keyword(s):  
Particle Image Velocimetry ◽  
Heart Valves ◽  
Particle Image ◽  
Fluid Dynamic ◽  
Dynamic Assessment ◽  
Image Velocimetry

Development of 3-D Printed Optically Clear Rigid Anatomical Vessels for Particle Image Velocimetry Analysis in Cardiovascular Flow

2019 ◽  
Author(s):  
Nicholas Stanley ◽  
Ashley Ciero ◽  
William Timms ◽  
Rodward L. Hewlin
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Flow Analysis ◽  
Index Of Refraction ◽  
Working Fluid ◽  
Post Processing ◽  
Anatomical Models ◽  
Tracer Particles ◽  
Image Velocimetry ◽  
Flow Tracer

Abstract In recent years, blood flow analysis of diseased arterial mock vessels using particle image velocimetry (PIV) has been hampered by the inability to fabricate optically clear anatomical vessel models that realistically replicate the complex morphology of arterial vessels and provide highly resolved flow images of flow tracer particles. The aim of the present work is to introduce an approach for producing optically clear rigid anatomical models that are suitable for PIV analysis using a common 3-D SLA inkjet printing process (using a Formlabs Form 2 3-D printer) and stock clear resin (RS-F2-GPCL-04). By matching the index of refraction (IOR) of the working fluid to the stock clear resin material, and by printing the part in a 45-degree print orientation, a clear anatomical model that allows clear visualization of flow tracer particles can be produced which yields highly resolved flow images for PIV analyses. However, a 45-degree print orientation increases the need for post processing due to an increased amount of printed support material. During post processing, the part must be wet sanded in several steps and surface finished with Novus Plastic Polish 3 Step System to achieve the final surface finish needed to yield high quality flow images. The fabrication methodology of the clear anatomical models is described in detail.

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