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Related Experiment Videos

Flow visualization study on centrifugal blood pump using a high speed video camera

I Sakuma1, H Tadokoro, Y Fukui

  • 1Department of Applied Electronic Engineering, Faculty of Science and Engineering, Tokyo Denki University, Japan.

Artificial Organs
|July 1, 1995
PubMed
Summary

High-speed video flow visualization effectively revealed complex secondary flow patterns and washout effects in centrifugal blood pumps. This technique aids in optimizing pump design to reduce hemolysis and thrombus formation.

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Medical Device Design

Background:

  • Flow visualization is crucial for evaluating rotary blood pumps.
  • High impeller speeds in centrifugal blood pumps hinder detailed flow analysis near vanes.

Purpose of the Study:

  • To develop and apply an advanced flow visualization technique for centrifugal blood pumps.
  • To analyze complex secondary flow patterns and washout effects within the pump impeller.

Main Methods:

  • Utilized a tracer method with a high-speed video camera (>2,000 frames/s).
  • Employed computer-assisted image measurement for detailed analysis.
  • Visualized flow patterns near impeller vanes, including vortices and recirculation.

Main Results:

Related Experiment Videos

  • Successfully visualized complex secondary flow patterns near the impeller vanes.
  • Demonstrated the enhanced washout effect of secondary washout vanes.
  • Identified vortices and recirculation zones within the pump.

Conclusions:

  • The high-speed video tracer method is effective for analyzing centrifugal blood pump flow.
  • Provides critical insights for improving pump design to minimize hemolysis and thrombus formation.