2009 Design of Medical Devices Conference Abstracts

The Design of a Cell-Phone Based Balance-Training Device PUBLIC ACCESS

[+] Author and Article Information
J. H. Kim, K. H. Sienko

 University of Michigan, Ann Arbor, USA

J. Med. Devices 3(2), 027510 (Jul 01, 2009) (1 page) doi:10.1115/1.3135151 History: Published July 01, 2009


Postural imbalance can result from various vestibular (central and peripheral), neurological, orthopedic, and vascular disorders, as well as sensory conflicts, head injuries, infections, medications, and aging. Balance rehabilitation has been shown to improve the quality of life of individuals with balance disorders by facilitating the development of compensatory strategies which mitigate dizziness, improve balance, and increase the ability to perform activities of daily living. The goal of this work is to design a cell phone based balance training device that can be used in the home to assist a patient with therapist-assigned balance exercises or in an environment where access to balance therapy is limited (i.e., rural regions in the developing world). The prototype comprises an iPhone (iPhone SDK, Apple), an auxiliary pager motor (Samsung GH31-00154C), and an audio amplifier (Analog Devices SSM2301). Body motion is detected by on-board tri-axial accelerometers, and a tilt estimate is computed using a low-pass filter. The phone's native pager motor and an auxiliary pager motor are used to provide real-time vibrotactile cues of body tilt along a single axis. The phone is worn on the small of the back to provide anterior-posterior vibrotactile trunk tilt feedback during stance, and worn near the right hip to provide medial-lateral vibrotactile trunk tilt feedback during gait. Auditory files direct the user through a series of standard balance rehabilitation exercises. A summary of the user's performance is displayed on the phone's screen following completion of the exercise.

Copyright © 2009 by American Society of Mechanical Engineers
This article is only available in the PDF format.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In