Why the study?
The ShuttlePump total artificial heart required a linear actuator providing about 45 N of axial force while minimizing volume and winding power losses that could cause excess heating or blood damage.
A novel tubular linear actuator for a total artificial heart was successfully designed and validated through FEM simulations and experimental measurements.
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Advances compact TAH actuator concepts; leaves open clinical translation pending preclinical validation.
TheShuttlePumpis a novel implantable total artificial heart (TAH) concept based on a linear-rotary actuator and currently under development at the Power Electronic Systems Laboratory, ETH Zurich, in close partnership with Charité Berlin and the Medical University of Vienna. This article presents the analysis, design, and realization of theShuttlePumplinear actuator (LA) part, which is necessary to provide about 45 N of axial actuation force. Design criteria are minimization of volume and generated power losses in the winding, which could result in excess heating and/or blood damage, i.e., protein denaturation and aggregation. The LA is implemented as a tubular LA (TLA) to maximize the active area for linear/axial force generation. After a preliminary analysis based on first principles, the TLA is optimized in detail with the aid of FEM simulations. The experimental measurements conducted on the realized TLA prototype verify the FEM simulation results and confirm the suitability for the realization of theShuttlePumpTAH.
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Giuffrida et al. (2023) studied this question.
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