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Pulsatile driving of the helical flow pump.
Summary
The new helical flow pump (HFP) for total artificial hearts offers excellent pulsatility and control. This blood pump achieves desired flow rates and pressure with lower speeds, demonstrating its potential for advanced cardiac support.
Area of Science:
- Biomedical Engineering
- Cardiovascular Technology
Background:
- The development of effective blood pumps is crucial for total artificial heart (TAH) technology.
- Existing axial and centrifugal pumps have limitations in achieving optimal pulsatile flow characteristics.
Purpose of the Study:
- To evaluate the pulsatility and flow control capabilities of a newly developed helical flow pump (HFP).
- To assess the HFP's performance in generating pulsatile flow for potential TAH applications.
Main Methods:
- Utilized a mock circulation loop to simulate physiological conditions.
- Modulated the rotational speed of the HFP in terms of amplitude and heart rate to generate pulsatile flow.
- Measured and analyzed pump flow, pump head, rotational speed, and power consumption.
Main Results:
- Achieved complete pulsatile flow with a mean flow rate of 5 L/min and a mean pressure head of 100 mmHg.
- Optimal pulsatile flow was obtained at ± 500 rpm with a mean rotational speed of 1378-1398 rpm and heart rates from 60-120 bpm.
- Demonstrated arbitrary adjustment of flow profiles, including non-pulsatile, quasi-pulsatile, and complete pulsatile flow.
Conclusions:
- The helical flow pump (HFP) exhibits excellent pulsatility, making it a promising candidate for total artificial hearts.
- The HFP offers significant control flexibility over flow profiles, adapting to various physiological needs.
- The pump's ability to operate at lower rotational speeds compared to traditional pumps is a key advantage.
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