A miniature intraventricular axial flow blood pump that is introduced through the left ventricular apex

Area of Science:

• Biomedical Engineering
• Cardiovascular Devices
• Medical Technology

Background:

• Heart failure remains a significant health challenge requiring advanced therapeutic solutions.
• Left ventricular assist devices (LVADs) are crucial for managing end-stage heart failure.
• Existing LVADs often involve complex implantation and may have limitations.

Purpose of the Study:

• To design and develop a novel intraventricular axial flow blood pump for use as a left ventricular assist device (LVAD).
• To evaluate the performance of this new LVAD in a mock circulatory system and an acute animal model.
• To assess the potential for less invasive surgical procedures with this device.

Main Methods:

• Development of a compact intraventricular axial flow blood pump with a three-vane impeller and guide vane.
• Introduction of the pump into the left ventricular (LV) cavity via the LV apex.
• Testing in a mock circulatory system to measure flow against differential pressure.
• Evaluation in an acute dog model to determine pump output.

Main Results:

• The pump achieved a flow rate of > 8 L/min against a 90 mmHg differential pressure in the mock circulatory system.
• In an acute dog model, the pump demonstrated a sufficient output of 200 ml/kg/min.
• The pump flow exhibited a pulsatile pattern despite fixed rotation speed, correlating with cardiac cycle dynamics.

Conclusions:

• The designed intraventricular axial flow blood pump is a simple, compact, and effective potential left ventricular assist device (LVAD).
• The device shows promise for prompt accessibility and requires less invasive surgical procedures.
• Further research and clinical trials are warranted to establish its efficacy in patients.