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Related Concept Videos

Blood Flow01:29

Blood Flow

75.3K
Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
75.3K

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Related Experiment Video

Updated: Dec 28, 2025

In Vitro Model of Physiological and Pathological Blood Flow with Application to Investigations of Vascular Cell Remodeling
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In Vitro Model of Physiological and Pathological Blood Flow with Application to Investigations of Vascular Cell Remodeling

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A novel roller pump for physiological flow.

Albert Chong1, Zhonghua Sun1, Lennart van de Velde2,3,4

  • 1Department of Medical Radiation Sciences, Curtin University, Perth, WA, Australia.

Artificial Organs
|February 18, 2020
PubMed
Summary
This summary is machine-generated.

A novel roller pump accurately replicates physiological blood flow waveforms, crucial for testing medical devices and perfusion systems. This study confirms its suitability for experimental flow phantoms and benchtop testing.

Keywords:
blood pumpcardiopulmonary bypassexperimental studyextracorporeal membrane oxygenationflow phantomin vivophysiological flowpulsatile flowroller pumptriphasic flow

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Medical Device Development

Background:

  • Accurate physiological blood flow waveforms are essential for evaluating medical devices like stents and mechanical heart valves.
  • Perfusion systems for cardiopulmonary bypass and extracorporeal membrane oxygenation also rely on precise flow characteristics.

Purpose of the Study:

  • To investigate the feasibility of a novel roller pump for generating physiological flow waveforms in experimental settings.
  • To assess the pump's performance in simulating various blood flow profiles, including carotid, suprarenal, and infrarenal flows.

Main Methods:

  • Utilized an ultrasonic flow meter to measure flow rates generated by the novel roller pump.
  • Employed video analysis of pump motion to derive flow rates.
  • Compared measured flow rates against programmed reference flow rates at key physiological time-points (PSV, ESV, PDV).

Main Results:

  • Flow rates measured by the ultrasonic flow meter closely matched programmed reference flow rates for the carotid profile (similarity index 0.97).
  • Video analysis of pump motion also demonstrated high agreement with reference flow rates across different profiles (similarity indices 0.96-0.99).
  • Specific flow rate comparisons at peak systolic velocity, end systolic velocity, and peak diastolic velocity showed good correlation between measured and programmed values.

Conclusions:

  • The novel roller pump is capable of producing physiological blood flow waveforms suitable for experimental studies.
  • This pump is a viable tool for benchtop testing of medical devices and perfusion systems requiring accurate hemodynamic simulation.