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Related Experiment Video
Updated: Jun 12, 2026

Use of Two Intracorporeal Ventricular Assist Devices As a Total Artificial Heart
Published on: May 11, 2018
A passively controlled biventricular support device.
Nicholas Richard Gaddum1, Daniel Lee Timms, Mark John Pearcy
1School of Engineering Systems and Medical Device Domain, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia. nickgaddum@gmail.com
This study introduces a passive controller for rotary biventricular support (BiVS) systems to address pump output balancing issues. The device successfully maintained arterial pressure during simulated hemodynamic instability, showing promise for stable cardiac support.
Area of Science:
- Biomedical Engineering
- Cardiovascular Devices
- Control Systems
Background:
- Balancing pump outputs is a critical challenge in rotary biventricular support (BiVS).
- The unreliability of long-term, blood-immersed pressure sensors necessitates novel control strategies.
- Existing systems face control issues impacting long-term viability.
Purpose of the Study:
- To develop and evaluate a novel passive control strategy for rotary BiVS systems.
- To improve the inherent stability and reliability of biventricular support devices.
- To emulate the native baroreceptor response using a mechanical passive controller.
Main Methods:
- A rotary BiVS device was designed and constructed incorporating a mechanical passive controller.
- In vitro testing was conducted using a dual-circuit hydraulic mock circulation loop.
- Hemodynamic destabilization was simulated to assess the device's autoregulation capabilities.
Main Results:
- The prototype successfully maintained arterial pressures during sudden induced hemodynamic destabilization.
- The passive controller demonstrated autoregulation of pump outputs.
- Inlet suction was observed under specific conditions of reduced venous return during simulated hypertension.
Conclusions:
- The developed passive controller shows potential for creating inherently stable, fully passive biventricular support.
- Further development is warranted based on promising in vitro performance.
- The device offers a viable alternative to complex active control systems for BiVS.
