Special Section Technical Briefs

Torsional Ventricular-Assist Device: Design Considerations and Prototype Development1

[+] Author and Article Information
Elaine Soohoo, Hsuan Ma, Anne Alcasid

Department of Biomedical Engineering,
Carnegie Mellon University,
Pittsburgh, PA 15213

Dennis R. Trumble

Department of Biomedical Engineering,
Carnegie Mellon University,
Pittsburgh, PA 15213;
Left Field Cardiac, Inc.,
Pittsburgh, PA 15213

DOI: 10.1115/1.4033117Manuscript received March 1, 2016; final manuscript received March 16, 2016; published online May 12, 2016. Editor: William Durfee.

J. Med. Devices 10(2), 020906 (May 12, 2016) (2 pages) Paper No: MED-16-1057; doi: 10.1115/1.4033117 History: Received March 01, 2016; Revised March 16, 2016

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Soohoo, E. , Waldman, L. K. , and Trumble, D. R. , 2015, “ Effects of Apical Torsion Angle on Global Hemodynamics During Heart Failure,” ASAIO 61st Annual Conference, Chicago, IL, June 24-27, Abstract No. 139, p. 62.
Trumble, D. , McGregor, W. , Kerckhoffs, R. , and Waldman, L. , 2011, “ Cardiac Assist With a Twist: Apical Torsion as a Means to Improve Heart Function,” ASME J. Biomech. Eng., 133(10), p. 101003. [CrossRef]


Grahic Jump Location
Fig. 1

Exploded view of the proposed tVAD prototype components featuring (from left to right): the deployment handle, claw actuator, and cup interface

Grahic Jump Location
Fig. 2

Glovelike flexible cup interface that features an inner pocket (a) with webbing for claw segments to fit between smooth epicardial (b) and pericardial (c) surface interfaces to minimalize tissue trauma

Grahic Jump Location
Fig. 3

Collapsible claw like mechanical actuator (a) that features a threaded deployment system (b) and flexible fingerlike truss segments that allow for a snug fit onto the epicardial surface



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