Related Experiment Videos
Augmented destruction test with an electromechanical pulsatile total artificial heart.
Y Ohashi1, A Andrade, J Müller
1Department of Surgery, Baylor College of Medicine, Houston, Texas, USA.
Artificial Organs
|January 15, 2000
Summary
This study tested a total artificial heart (TAH) under extreme conditions for durability. Redesigning a stressed component improved its connection, ensuring TAH reliability for future preclinical studies.
Area of Science:
- Biomedical Engineering
- Cardiovascular Devices
Background:
- Preclinical studies require rigorous component reliability and durability testing for medical devices.
- Total artificial hearts (TAHs) are critical for end-stage heart failure treatment.
Purpose of the Study:
- To assess the long-term mechanical reliability and durability of a newly developed total artificial heart (TAH).
- To identify and address potential mechanical weaknesses in the TAH under severe operational stress.
Main Methods:
- A 4-month destruction test was performed on the TAH under simulated extreme conditions (dP/dt > 15,000 mm Hg/s, 37°C).
- The TAH was operated in a left master alternative (LMA) mode with specific flow and pressure parameters.
- Monitoring included outflow, internal pressures, and temperature; stress concentration areas were analyzed.
Main Results:
- Several stress concentration areas were identified, notably the roller nut and support plate connection.
- The identified connection was redesigned for improved durability.
- No actuator or controller malfunctions occurred; temperature increase remained below 1°C.
Conclusions:
- The redesigned TAH component demonstrated enhanced durability under extreme testing.
- The TAH system exhibits promising reliability for progression to further preclinical evaluation.