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[Pulsatile rotary pumps with low hemolysis].

K Qian1, P Zeng, W Ru

  • 1Institute of Biomedical Engineering, Jiangsu University of Science & Technology, Zhenjiang 212013.

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi = Journal of Biomedical Engineering = Shengwu Yixue Gongchengxue Zazhi
|October 19, 2001
PubMed
Summary

Developing pulsatile rotary pumps for assisted circulation is challenging due to hemolysis. This study presents a novel pulsatile radial pump design that minimizes turbulence, reducing red blood cell damage effectively.

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Devices
  • Hemodynamics

Context:

  • Pulsatile flow is crucial for effective assisted circulation.
  • Rotary pumps often induce hemolysis due to turbulent shear.
  • Existing designs struggle to balance pulsatility with minimal blood damage.

Purpose:

  • To develop a pulsatile rotary pump that minimizes hemolysis.
  • To investigate the relationship between pump design, turbulence, and red blood cell damage.
  • To evaluate the long-term efficacy and safety of a novel pulsatile radial pump.

Summary:

  • A pulsatile radial pump was designed with twisted vanes to minimize turbulence during speed variations.
  • Hemolysis tests showed a low Index of Hemolysis (IH = 0.020), comparable to non-pulsatile designs.

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  • Animal experiments demonstrated successful long-term circulatory support in calves without adverse effects.

    • Impact:

    • This research offers a promising solution for creating safer and more effective rotary pumps for cardiac assistance.
    • The findings contribute to understanding and mitigating hemolysis in blood-contacting medical devices.
    • The developed pulsatile radial pump shows potential for clinical application in treating heart failure.