Abstract #0084

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

Seraina Anne Dual^1,2, Mattia Arduini¹, Brigitte Schmittlein ³, Judith Zimmermann^1,4, Ellen Roche⁵, and Daniel Ennis^2,6,7

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

Synopsis

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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