Design of a handheld tissue grasping device to measure tissue mechanical properties in-vivo or in a laboratory setting

Bradley Drahos, Amer Safdari, Faizan Malik, Rebecca Smith, Matt Kubala, Jack Norfleet, Conner Parsey, Shikha Goodwin, Timothy M. Kowalewski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

With medical institutions increasing the use of medical simulators for educational purposes it is detrimental that the knowledge gap regarding tissue mechanical properties be researched further in depth. The grasper device discussed throughout this paper aims to provide researchers a handheld device capable of testing soft organs and tissue in-vivo and ex-situ in a laboratory setting. The device consists of two load cells on the inner jaws of the grasper to measure compressive force and an encoder to monitor the graspers angular position which yields tissue position and strain. Accompanying the grasper is a GUI written in Rust which is capable of data file management, and providing a 10 second live feed of load cell and encoder readings. The grasper device is currently being employed in a study testing the tissue mechanical response of porcine tissue at states ranging from in-vivo to ex-situ post freeze. The results from this test, and subsequent tests using the grasper have the capability of providing much needed knowledge regarding tissue mechanical properties to improve medical simulators and medical education as a whole.

Original languageEnglish (US)
Title of host publicationFrontiers in Biomedical Devices, BIOMED - 2020 Design of Medical Devices Conference, DMD 2020
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791883549
DOIs
StatePublished - 2020
Event2020 Design of Medical Devices Conference, DMD 2020 - Minneapolis, United States
Duration: Apr 6 2020Apr 9 2020

Publication series

NameFrontiers in Biomedical Devices, BIOMED - 2020 Design of Medical Devices Conference, DMD 2020

Conference

Conference2020 Design of Medical Devices Conference, DMD 2020
CountryUnited States
CityMinneapolis
Period4/6/204/9/20

Bibliographical note

Funding Information:
The authors would like to thank the U.S. Army Futures Command (Department of Defense) for sponsoring the design of the grasper and current porcine tissue grasping study. We would also like to thank Paul Iazzo, Tinen Isles, and all of the staff at the Visible Heart Lab (VHL) at the University of Minnesota for providing grasper design input and all animal tissue used to verify the graspers performance and for the current porcine tissue grasping study. Without the funding provided by the U.S. Army Research Laboratory and assistance provided by the Visible Heart Lab this device would not have been possible to design, construct, and implement.

Publisher Copyright:
Copyright © 2020 ASME

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