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Related Experiment Videos

Development of a totally implantable total artificial heart controller.

S H Lee1, W W Choi, B G Min

  • 1Department of Biomedical Engineering, College of Medicine, Seoul National University, Korea.

ASAIO Transactions
|July 1, 1991
PubMed
Summary

A new implantable control system for artificial hearts was developed using advanced microcontrollers. This system offers improved stability and reduced power consumption compared to older designs.

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Control Systems

Background:

  • Artificial heart technology requires sophisticated control systems for effective function.
  • Previous control systems faced limitations in power consumption and stability.

Purpose of the Study:

  • To develop an advanced implantable control system for a pendulum-type electromechanical total artificial heart.
  • To enhance system stability and reduce power consumption.

Main Methods:

  • Utilized an 87C196 microcontroller (One Chip EPROM) and an erasable and programmable logic device (EPLD).
  • Implemented a four-part system: main management, motor driver, state monitoring, and communication.
  • Incorporated proportional-integral (PI) control and pulse width modulation (PWM) generation.

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  • Employed a dual power system with photocoupler arrays for stability.

    • Main Results:

    • The new system demonstrated good performance correspondence with the previous Z80 microprocessor-based system.
    • Achieved a one-third reduction in logic power consumption compared to the prior controller.
    • Overall system performance was validated through mock circulation tests.

    Conclusions:

    • The developed control system offers a viable and improved alternative for artificial heart applications.
    • The use of 87C196 and EPLD resulted in enhanced stability and significant power savings.