Flexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device

Home-based hand rehabilitation has excellent potential as it may reduce patient dropouts due to travel, transportation, and insurance constraints. Being able to perform exercises precisely, accurately, and in a repetitive manner, robot-aided portable devices have gained much traction these days in h...

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Autores principales:	Tanvir Ahmed, Md Assad-Uz-Zaman, Md Rasedul Islam, Drew Gottheardt, Erin McGonigle, Brahim Brahmi, Mohammad Habibur Rahman
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hand rehabilitation isolated joints isolated digits fingers thumb compliant mechanism Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/6b954a4c50524083b7116bae51493812
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id	oai:doaj.org-article:6b954a4c50524083b7116bae51493812
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spelling	oai:doaj.org-article:6b954a4c50524083b7116bae514938122021-11-25T18:22:41ZFlexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device10.3390/mi121112742072-666Xhttps://doaj.org/article/6b954a4c50524083b7116bae514938122021-10-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1274https://doaj.org/toc/2072-666XHome-based hand rehabilitation has excellent potential as it may reduce patient dropouts due to travel, transportation, and insurance constraints. Being able to perform exercises precisely, accurately, and in a repetitive manner, robot-aided portable devices have gained much traction these days in hand rehabilitation. However, existing devices fall short in allowing some key natural movements, which are crucial to achieving full potential motion in performing activities of daily living. Firstly, existing exoskeleton type devices often restrict or suffer from uncontrolled wrist and forearm movement during finger exercises due to their setup of actuation and transmission mechanism. Secondly, they restrict passive metacarpophalangeal (MCP) abduction–adduction during MCP flexion–extension motion. Lastly, though a few of them can provide isolated finger ROM, none of them can offer isolated joint motion as per therapeutic need. All these natural movements are crucial for effective robot-aided finger rehabilitation. To bridge these gaps, in this research, a novel lightweight robotic device, namely “Flexohand”, has been developed for hand rehabilitation. A novel compliant mechanism has been developed and included in Flexohand to compensate for the passive movement of MCP abduction–adduction. The isolated and composite digit joint flexion–extension has been achieved by integrating a combination of sliding locks for IP joints and a wire locking system for finger MCP joints. Besides, the intuitive design of Flexohand inherently allows wrist joint movement during hand digit exercises. Experiments of passive exercises involving isolated joint motion, composite joint motions of individual fingers, and isolated joint motion of multiple fingers have been conducted to validate the functionality of the developed device. The experimental results show that Flexohand addresses the limitations of existing robot-aided hand rehabilitation devices.Tanvir AhmedMd Assad-Uz-ZamanMd Rasedul IslamDrew GottheardtErin McGonigleBrahim BrahmiMohammad Habibur RahmanMDPI AGarticlehand rehabilitationisolated jointsisolated digitsfingersthumbcompliant mechanismMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1274, p 1274 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hand rehabilitation isolated joints isolated digits fingers thumb compliant mechanism Mechanical engineering and machinery TJ1-1570
spellingShingle	hand rehabilitation isolated joints isolated digits fingers thumb compliant mechanism Mechanical engineering and machinery TJ1-1570 Tanvir Ahmed Md Assad-Uz-Zaman Md Rasedul Islam Drew Gottheardt Erin McGonigle Brahim Brahmi Mohammad Habibur Rahman Flexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device
description	Home-based hand rehabilitation has excellent potential as it may reduce patient dropouts due to travel, transportation, and insurance constraints. Being able to perform exercises precisely, accurately, and in a repetitive manner, robot-aided portable devices have gained much traction these days in hand rehabilitation. However, existing devices fall short in allowing some key natural movements, which are crucial to achieving full potential motion in performing activities of daily living. Firstly, existing exoskeleton type devices often restrict or suffer from uncontrolled wrist and forearm movement during finger exercises due to their setup of actuation and transmission mechanism. Secondly, they restrict passive metacarpophalangeal (MCP) abduction–adduction during MCP flexion–extension motion. Lastly, though a few of them can provide isolated finger ROM, none of them can offer isolated joint motion as per therapeutic need. All these natural movements are crucial for effective robot-aided finger rehabilitation. To bridge these gaps, in this research, a novel lightweight robotic device, namely “Flexohand”, has been developed for hand rehabilitation. A novel compliant mechanism has been developed and included in Flexohand to compensate for the passive movement of MCP abduction–adduction. The isolated and composite digit joint flexion–extension has been achieved by integrating a combination of sliding locks for IP joints and a wire locking system for finger MCP joints. Besides, the intuitive design of Flexohand inherently allows wrist joint movement during hand digit exercises. Experiments of passive exercises involving isolated joint motion, composite joint motions of individual fingers, and isolated joint motion of multiple fingers have been conducted to validate the functionality of the developed device. The experimental results show that Flexohand addresses the limitations of existing robot-aided hand rehabilitation devices.
format	article
author	Tanvir Ahmed Md Assad-Uz-Zaman Md Rasedul Islam Drew Gottheardt Erin McGonigle Brahim Brahmi Mohammad Habibur Rahman
author_facet	Tanvir Ahmed Md Assad-Uz-Zaman Md Rasedul Islam Drew Gottheardt Erin McGonigle Brahim Brahmi Mohammad Habibur Rahman
author_sort	Tanvir Ahmed
title	Flexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device
title_short	Flexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device
title_full	Flexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device
title_fullStr	Flexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device
title_full_unstemmed	Flexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device
title_sort	flexohand: a hybrid exoskeleton-based novel hand rehabilitation device
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6b954a4c50524083b7116bae51493812
work_keys_str_mv	AT tanvirahmed flexohandahybridexoskeletonbasednovelhandrehabilitationdevice AT mdassaduzzaman flexohandahybridexoskeletonbasednovelhandrehabilitationdevice AT mdrasedulislam flexohandahybridexoskeletonbasednovelhandrehabilitationdevice AT drewgottheardt flexohandahybridexoskeletonbasednovelhandrehabilitationdevice AT erinmcgonigle flexohandahybridexoskeletonbasednovelhandrehabilitationdevice AT brahimbrahmi flexohandahybridexoskeletonbasednovelhandrehabilitationdevice AT mohammadhabiburrahman flexohandahybridexoskeletonbasednovelhandrehabilitationdevice
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Flexohand: A Hybrid Exoskeleton-Based Novel Hand Rehabilitation Device

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