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A linear motor and compact cylinder-piston driver for left ventricular bypass
1Department of Biomedical Engineering, Shanghai Second Medical University, China.
Journal of Biomedical Engineering
|January 1, 1990
Summary
A novel pneumatic driver was developed for medical applications. This portable, noise-free device effectively powered a diaphragm pump, supporting experimental animal circulation.
Area of Science:
- Biomedical Engineering
- Mechanical Engineering
Background:
- Developing efficient and portable drivers is crucial for medical devices.
- Existing pneumatic drivers often suffer from noise and bulkiness.
Purpose of the Study:
- To develop a simple, portable, reliable, and noise-free pneumatic driver.
- To evaluate the driver's performance in conjunction with a diaphragm pump for circulatory support.
Main Methods:
- A linear motor was integrated with a cylinder-piston unit, with the coil wound on the cylinder and a permanent magnet on the piston.
- A continuous voltage square wave was applied to the coil, inducing reciprocation and alternating air pressure/vacuum.
- The driver was tested in vitro and in vivo with a diaphragm pump.
Main Results:
- The driver successfully operated a diaphragm pump.
- Circulatory support was achieved in an experimental animal model.
- The device weighs 12 kg, consumes 30 W for 200 mmHg pressure/-80 mmHg vacuum, and operates at ~30 dB noise levels.
Conclusions:
- The developed pneumatic driver is a viable, low-noise, and portable solution for medical applications.
- Its performance supports its use in systems requiring precise air pressure and vacuum generation, such as circulatory support devices.