Soft robotic in the construction of prosthetic heart valve: a novel approach

Abstract

In this study, we describe the design, fabrication and computational testing of a new prosthetic device for aortic valve replacement. The device is an active stent composed of a silicone rubber during initial prototyping, with adaptation towards a hydrogel, poly-vinyl alcohol reinforced with bacterial cellulose nanofibres underway. The nature of the stent is soft robotic (SR), where an increase in internal pressure of the pneumatic network causes an increase in the internal diameter of the device. When working in tandem with the SR heart valve, described briefly, pulsations of the blood and the energy gained from ventricular pressure actuates the valve-and-stent combination. This increases the effective orifice area of the entire device and addresses an issue with small sized heart valves facing prosthesis–patient mismatch.

Keywords:

• Soft robotic
• polymer valve
• aortic valve prostheses
• thrombogenicity
• RBC lysis

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors would like to thank the University of British Columbia and the Natural Sciences and Engineering Research Council of Canada – Discovery Grant Program for financially supporting this study.