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Updated: Jul 17, 2026
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Utilizing Percutaneous Ventricular Assist Devices in Acute Myocardial Infarction Complicated by Cardiogenic Shock
Published on: June 12, 2021
Detection and avoiding ventricular suction of ventricular assist devices
A Tanaka1, M Yoshizawa, P Olegario
1Member, IEEE, Faculty of Symbiotic System Science, Fukushima University, Fukushima, 960-1296 Japan (e-mail: a-tanaka@ieee.org).
Summary
This study presents a novel control algorithm for continuous flow blood pumps to prevent left ventricle suction. By adjusting the right pump
Area of Science:
- Biomedical Engineering
- Cardiovascular Devices
- Artificial Organs
Background:
- Continuous flow blood pumps (axial, centrifugal) are favored for total artificial hearts (TAHs) and biventricular assist devices (BVADs) due to their compact design.
- These pumps, unlike pulsatile ones, face a higher risk of left ventricle suction, especially during rapid flow rate adjustments to meet physiological demands.
Purpose of the Study:
- To develop and evaluate a control algorithm to prevent left ventricle suction in continuous flow circulatory support systems.
- To investigate an alternative control strategy that modifies right pump speed instead of reducing left pump output.
Main Methods:
- Development of a novel control algorithm focused on modulating the right pump's rotational speed.
- Testing the algorithm in acute animal experiments using calves to assess its efficacy in preventing ventricle suction.
Main Results:
- The proposed control algorithm effectively prevented left ventricle suction in animal models.
- The system demonstrated the capability to maintain circulatory control while preventing suction events.
- Maximized flow rates were achievable even in unstable circulatory conditions, such as early post-operation.
Conclusions:
- A new control strategy using right pump speed adjustment can successfully prevent left ventricle suction in continuous flow devices.
- This method offers a significant advantage by allowing maximized cardiac output during critical, unstable circulatory periods.
- The findings support the potential of this algorithm for enhancing the safety and performance of TAHs and BVADs.
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