Development of a compact portable driver for a pneumatic ventricular assist device

Area of Science:

• Biomedical Engineering
• Cardiovascular Devices
• Medical Technology

Background:

• Current pneumatic ventricular assist device (VAD) drivers, like the Toyobo-National Cardiovascular Center (NCVC) model, are bulky, heavy, and power-intensive.
• These limitations hinder patient mobility and reduce overall quality of life.

Purpose of the Study:

• To develop a compact, low-noise, portable VAD driver to enhance patient safety and quality of life.
• To address the mobility and power consumption issues associated with existing VAD technology.

Main Methods:

• Development of an electrohydraulic actuator using a brushless DC motor and regenerative pump.
• Integration of rechargeable batteries for portable power and external AC power capability.
• Design for a compact (33 x 25 x 43 cm) and lightweight (13 kg) unit mounted on a mobile cart.

Main Results:

• The new driver demonstrated a pumping capacity of up to 8 l/min during in vitro testing with a Toyobo-NCVC VAD.
• The unit operates for up to 2 hours on two lightweight rechargeable batteries.
• The portable design significantly reduces size and weight compared to conventional drivers.

Conclusions:

• The newly developed compact portable VAD driver offers a significant improvement for patients requiring long-term VAD support.
• This innovation enhances patient quality of life and safety through improved mobility and reduced power consumption.