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Total artificial heart using neural and fuzzy controller

M Lee1, J M Ahn, B G Min

  • 1Department of Electrical Engineering, Korea Maritime University, Pusan.

Artificial Organs
|November 1, 1996
PubMed
Summary
This summary is machine-generated.

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A novel neural controller for total artificial hearts (TAH) effectively regulates aortic and pulmonary artery pressures without sensors. This advanced system ensures patient survival by maintaining optimal blood flow and preventing atrial suction.

Area of Science:

  • Biomedical Engineering
  • Artificial Organs
  • Control Systems

Background:

  • Aortic pressure (AoP) and pulmonary artery pressure (PAP) are critical for patient survival after total artificial heart (TAH) implantation.
  • Effective afterload regulation is essential for TAH performance and long-term outcomes.

Purpose of the Study:

  • To develop and evaluate a novel afterload regulation method for a moving actuator type TAH.
  • To implement a sensorless neural controller for AoP regulation and a fuzzy controller for PAP management.

Main Methods:

  • A neural controller adjusts actuator velocity based on motor current to regulate AoP.
  • A fuzzy controller utilizes expert knowledge to prevent excessive PAP.
  • In vitro testing was conducted to validate the controller's efficacy.

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Main Results:

  • The proposed neural and fuzzy controllers effectively regulated both AoP and PAP.
  • The system successfully prevented abnormal elevations in PAP.
  • Right heart suction was effectively controlled, maintaining normal pump output.

Conclusions:

  • The developed neural and fuzzy control strategy offers a promising solution for TAH afterload regulation.
  • This sensorless approach enhances TAH functionality, improving patient survival prospects.
  • The system demonstrates robust performance in maintaining physiological pressures and preventing adverse events.