Task-specific assistive device (TAD): An accessible technological solution for upper limb disability

Veena Jayasree-Krishnan, Shramana Ghosh, Jack Spiegler, Preeti Raghavan, Vikram Kapila

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

Abstract

The task-specific assistive device (TAD) is a compact and portable assistive device, consisting of an actuated six-bar linkage, designed to facilitate the activity of drinking from a cup without using the hands. In this paper, we examine the effectiveness of the device in supporting patients with conditions of incomplete tetraplegia and hemiplegia by simulating disability in 17 healthy subjects. The average percentage reduction in bending angle of torso with the use of TAD was found to be 40.31% for subjects with simulated incomplete tetraplegia and 37.14% for subjects with simulated hemiplegia. Users also completed the system usability scale (SUS), indicating that the device was easy to use. The user workload, measured using the NASA task load index (NASA-TLX), was found to be minimal and the device was found to be robust through user response to a user experience questionnaire. The results of this work indicate that TAD is a promising solution for facilitating independence in a basic activity of daily living such as drinking from a cup without using the hands.

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

Keywords

  • Assistive device
  • Disability
  • Disability simulation
  • Hemiplegia
  • Incomplete tetraplegia
  • NASA-TLX
  • Six-bar linkage
  • System usability scale
  • Task-specific assistive device
  • User experience questionnaire
  • User study

ASJC Scopus subject areas

  • Biomedical Engineering

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  • Cite this

    Jayasree-Krishnan, V., Ghosh, S., Spiegler, J., Raghavan, P., & Kapila, V. (2020). Task-specific assistive device (TAD): An accessible technological solution for upper limb disability. In Frontiers in Biomedical Devices, BIOMED - 2020 Design of Medical Devices Conference, DMD 2020 (Frontiers in Biomedical Devices, BIOMED - 2020 Design of Medical Devices Conference, DMD 2020). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/DMD2020-9047