Newly developed ventricular assist device with linear oscillatory actuator

Area of Science:

• Biomedical Engineering
• Mechanical Engineering
• Cardiovascular Devices

Background:

• Heart failure necessitates advanced mechanical circulatory support.
• Existing left ventricular assist devices (LVADs) can be complex and bulky.
• There is a need for more reliable and compact LVAD designs.

Purpose of the Study:

• To develop and evaluate a new direct electromagnetic left ventricular assist device (DEM-LVAD).
• To utilize a linear oscillatory actuator (LOA) for a simpler, more reliable pump mechanism.
• To assess the performance and feasibility of the novel DEM-LVAD design.

Main Methods:

• Designed a DEM-LVAD featuring a linear oscillatory actuator (LOA) with a pusher plate, eliminating complex movement converters.
• Fabricated pump housings using 3D CAD/CAM technology and incorporated Monostrut valves.
• Conducted in vitro testing to evaluate the device's output, efficiency, and stroke volume.

Main Results:

• The DEM-LVAD achieved a maximum output exceeding 6 L/minute and a maximum efficiency of 15% under tested conditions.
• Demonstrated a dynamic stroke volume ranging from 40 to 60 ml at 130 beats per minute.
• The device's compact dimensions (96 mm diameter, 50 mm thick, 0.62 kg mass) highlight its potential for reduced size.

Conclusions:

• The developed DEM-LVAD with a linear oscillatory actuator is feasible for clinical application.
• The simplified LOA design contributes to high reliability and a smaller device profile.
• This novel device shows potential as an effective treatment option for heart failure.