Why the study?
The novel ShuttlePump total artificial heart requires a linear actuator designed to provide about 45 N of axial actuation force while minimizing volume and winding power losses that could cause excess heating or blood damage.
A novel tubular linear actuator for the ShuttlePump total artificial heart was successfully designed and experimentally validated to provide the necessary axial force while minimizing volume and power losses.
Answers are grounded in this paper and cite their sources.
Supports compact TAH actuator development; leaves open clinical translation pending in vivo validation.
The ShuttlePump is a novel implantable total artificial heart (TAH) concept based on a Linear-Rotary Actuator (LiRA) and currently under development at the Power Electronic Systems Laboratory, ETH Zurich in close partnership with Charit´e Berlin and the Medical University of Vienna. This paper presents the analysis, design and realization of the ShuttlePump Linear 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 the ShuttlePump TAH.
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Giuffrida et al. (2023) studied this question.
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