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Related Experiment Videos

Flow visualization in an artificial heart using diffuse and planar laser lighting.

T Mussivand1, R Navarro, J F Chen

  • 1Department of Artifical Organs, Cleveland Clinic Foundation, OH 44106.

ASAIO Transactions
|July 1, 1988
PubMed
Summary
This summary is machine-generated.

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This study analyzed blood flow in an artificial heart, identifying disturbed flow, recirculation, and stagnation zones. These findings are crucial for improving artificial heart design and function.

Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Cardiovascular Science

Background:

  • Artificial heart devices are critical for patients with end-stage heart failure.
  • Understanding internal flow dynamics is essential for optimizing artificial heart performance and biocompatibility.

Purpose of the Study:

  • To characterize the complex flow properties within a clinical pusher plate type artificial heart.
  • To identify regions of disturbed flow, recirculation, and stasis.
  • To quantify velocities, turbulence, and shear stresses within the device.

Main Methods:

  • Utilized dual camera video and synchronized still photography for flow pattern visualization.
  • Employed diffused light and a planar laser source with tracer particles (magnesium oxide, Amberlite).

Related Experiment Videos

  • Digitized flow trajectories to calculate velocities, turbulence, and shear stresses, synchronizing with pump motion.

    • Main Results:

    • Identified disturbed, recirculating, and stagnation zones throughout the pumping cycle.
    • Quantified global and local turbulence values.
    • Observed simultaneous laminar and turbulent flow patterns, with velocities ranging from 2 to 145 cm/sec and shear stresses from 12 to 897 dynes/cm².

    Conclusions:

    • The study revealed complex flow dynamics, including simultaneous turbulence, stasis, and recirculation, within the artificial heart.
    • These findings highlight areas for design improvement to minimize adverse flow conditions.
    • Understanding these flow characteristics is vital for enhancing the hemocompatibility and efficacy of artificial heart technology.