Real-World Testing of the Self Grasping Hand, a Novel Adjustable Passive Prosthesis: A Single Group Pilot Study

O’Brien, Lisa; Montesano, Elena; Chadwell, AEA; Kenney, Laurence; Smit, Gerwin

Abstract

(1) Background: This study investigated the feasibility of conducting a two-week “real-world” trial of the Self Grasping Hand (SGH), a novel 3D printed passive adjustable prosthesis for hand absence; (2) Methods: Single-group pilot study of nine adults with trans-radial limb absence; five used body-powered split-hooks, and four had passive cosmetic hands as their usual prosthesis. Data from activity monitors were used to measure wear time and bilateral activity. At the end of the two-week trial, function and satisfaction were measured using the Orthotics and Prosthetics Users’ Survey Function Scale (OPUS) and the prosthesis satisfaction sub-scales of the Trinity Amputations and Prosthesis Experience Scale (TAPES). Semi-structured interviews captured consumer feedback and suggestions for improvement; (3) Results: Average SGH wear time over 2 weeks was 17.5 h (10% of total prosthesis wear time) for split-hook users and 83.5 h (63% of total prosthesis wear time) for cosmetic hand users. Mean satisfaction was 5.2/10, and mean function score was 47.9/100; (4) Two-week real-world consumer testing of the SGH is feasible using the methods described. Future SGH designs need to be more robust with easier grasp lock/unlock.

• Journal Article Type: Article
• Acceptance Date: Jan 2, 2022
• Online Publication Date: Feb 8, 2022
• Publication Date: Feb 8, 2022
• Deposit Date: Feb 3, 2022
• Publicly Available Date: Feb 10, 2022
• Journal: Prosthesis
• Print ISSN: 2673-1592
• Electronic ISSN: 2673-1592
• Publisher: MDPI
• Volume: 4
• Issue: 1
• Pages: 48-59
• DOI: https://doi.org/10.3390/prosthesis4010006
• Publisher URL: https://doi.org/10.3390/prosthesis4010006
• Related Public URLs: https://www.mdpi.com/journal/prosthesis
• Additional Information: Funders : Promobilia Foundation, Sweden; Grant Number: 18156