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Abstract #0084

Evaluation of operation pressure of a soft robotic extra-aortic cardiac assist device using MRI

Seraina Anne Dual1,2, Mattia Arduini1, Brigitte Schmittlein 3, Judith Zimmermann1,4, Ellen Roche5, and Daniel Ennis2,6,7
1Department of Radiology, Stanford University, Palo Alto, CA, United States, 2Cardiovascular Institute, Stanford University, Palo Alto, CA, United States, 3Department of Mechanical Engineering, Stanford University, Palo Alto, CA, United States, 4Department of Computer Science, Technical University of Munich, Garching, Germany, 5Institute for Medical Engineering & Science, Massachusetts Institute of Technology, Cambridge, MA, United States, 6Department of Radiology, Stanfor University, Palo Alto, CA, United States, 7Division of Radiology, Veterans Affairs Health Care System, Palo Alto, CA, United States


MRI can be used to evaluate the interaction of soft robotic devices with biological tissues. The aim of this study was to use MRI to optimize the actuation pressure of an extra-aortic soft robotic cardiac assist device. We evaluated wall deformations, displaced fluid volumes and qualitative flows induced by the actuator on a fluid filled elastic vessel. Our results show that the displaced volume increases with the actuator pressure and decreases with increasing the vessel pressure. The maximum actuator pressures do not lead to buckling of the vessel wall given the current three-bladder design.

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