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Related Experiment Videos

Eccentric roller type total artificial heart creating interatrial shunt.

H Wada1, S Fukunaga, M Watari

  • 1First Department of Surgery, Hiroshima University School of Medicine, Hiroshima International University, Hiroshima, Japan. hwada@mcai.med.hiroshima-u.ac.jp

Artificial Organs
|September 6, 2000
PubMed
Summary
This summary is machine-generated.

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Researchers improved the eccentric roller type total artificial heart (ERTAH) by reducing blood chamber size and adding an interatrial shunt. This enhanced device efficiency, cardiac output, and durability.

Area of Science:

  • Biomedical Engineering
  • Cardiovascular Devices
  • Artificial Organs

Background:

  • Total artificial hearts (TAHs) are crucial for end-stage heart failure treatment.
  • Previous TAH designs faced limitations in energy efficiency and durability.
  • Optimizing internal hydrodynamics and component size is key to improving TAH performance.

Purpose of the Study:

  • To enhance the performance of an eccentric roller type total artificial heart (ERTAH).
  • To improve energy efficiency, cardiac output, and durability through design modifications.
  • To investigate the impact of reduced blood chamber volumes and an interatrial shunt.

Main Methods:

  • Modified the left and right blood chamber volumes from 60 ml to 40 ml and 53 ml to 35 ml, respectively.

Related Experiment Videos

  • Incorporated an interatrial shunt to balance left-right blood flow.
  • Redesigned inlet and outlet ports to prevent backflow.
  • Evaluated performance using a mock circulatory system and an animal experiment.

    • Main Results:

    • Achieved a 20% increase in energy efficiency in the mock circulatory system.
    • Observed approximately a two-fold increase in cardiac output.
    • Demonstrated improved durability compared to previous ERTAH models.
    • In animal experiments, the ERTAH maintained flow rates of 6.0 L/min (left) and 5.4 L/min (right) at 160 rpm, with interatrial shunt flow of 250-400 ml/min.

    Conclusions:

    • Reducing blood chamber size and incorporating an interatrial shunt significantly enhances ERTAH performance.
    • The modified ERTAH shows improved energy efficiency, cardiac output, and durability.
    • These advancements represent a significant step towards more effective TAH devices.