A portable pneumatic driving unit for a left ventricular assist device

Area of Science:

• Biomedical Engineering
• Mechanical Engineering

Background:

• Development of portable energy sources for artificial hearts is crucial for patient mobility.
• Existing artificial heart driver systems often face challenges with size, weight, and complexity.

Purpose of the Study:

• To develop a compact and lightweight portable air driving unit for artificial hearts.
• To create an efficient pneumatic system that minimizes component count for enhanced reliability.

Main Methods:

• Utilized a commercially available Nickel-Cadmium (Ni-Cd) battery as the portable energy source.
• Employed a linear compressor for portable air compression.
• Implemented a novel pneumatic system regulating pressure via compressor output flow, eliminating the need for traditional pressure regulators and large air reservoirs.
• Integrated a one-board microcomputer and pressure sensors for precise pressure level control.

Main Results:

• The developed portable unit weighs 9.5 Kg.
• The system successfully drove a blood pump continuously for over 2 hours.
• Achieved stable operation at an output flow rate of 5 L/min and an output pressure of 100 mmHg.

Conclusions:

• The developed portable air driving unit is a viable energy source for artificial hearts.
• The novel pneumatic system design offers a simplified and potentially more reliable solution for artificial heart drivers.
• The unit's portability and sustained performance indicate potential for improved patient mobility and quality of life.