Special Section Technical Briefs

A Soft, Wearable, Quantitative Ankle Diagnostic Device1

[+] Author and Article Information
Jaehyun Bae, Joshua B. Gafford, Daniel Vogt, Yiğit Mengüç, Conor J. Walsh

Harvard School of Engineering and Applied Sciences,
Cambridge, MA 02138
Wyss Institute for Biologically Inspired Engineering,
Harvard University,
Boston, MA 02115

Jillian Lee, Melinda Malley, Dónal Holland

Harvard School of Engineering and Applied Sciences,
Cambridge, MA 02138

Jonathan Bean

New England GRECC,
Boston VAHS,
Jamaica Plain, MA, 02130
Spaulding Rehabilitation Hospital,
Harvard Medical School,
Boston, MA 02129

Accepted and presented at The Design of Medical Devices Conference (DMD2015), April 13–16, 2015, Minneapolis, MN, USA.

Manuscript received March 3, 2015; final manuscript received May 7, 2015; published online July 16, 2015. Editor: Arthur Erdman.

J. Med. Devices 9(3), 030905 (Sep 01, 2015) (3 pages) Paper No: MED-15-1060; doi: 10.1115/1.4030596 History: Received March 03, 2015; Revised May 07, 2015; Online July 16, 2015

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Renström, P., and Konradsen, L., 1997, “Ankle Ligament Injuries,” Br. J. Sports Med., 31(1), pp. 11–20. [CrossRef] [PubMed]
Bean, J., Kiely, D. K., Herman, S., Leveille, S. G., Mizer, K., Frontera, W. R., and Fielding, R. A., 2002, “The Relationship Between Leg Power and Physical Performance in Mobility—Limited Older People,” J. Am. Geriatr. Soc., 50(3), pp. 461–467. [CrossRef] [PubMed]
Bean, J. F., Leveille, S. G., Kiely, D. K., Bandinelli, S., Guralnik, J. M., and Ferrucci, L., 2003, “A Comparison of Leg Power and Leg Strength Within the InCHIANTI Study: Which Influences Mobility More?,” J. Gerontol., Ser. A, 58(8), pp. M728–M733. [CrossRef]
Bean, J. F., Kiely, D. K., LaRose, S., Goldstein, R., Frontera, W. R., and Leveille, S. G., 2010, “Are Changes in Leg Power Responsible for Clinically Meaningful Improvements in Mobility in Older Adults?,” J. Am. Geriatr. Soc., 58(12), pp. 2363–2368. [CrossRef] [PubMed]
Chossat, J., Park, Y., Wood, R., and Duchaine, V., 2013, “A Soft Strain Sensor Based on Ionic and Metal Liquids,” IEEE Sens. J., 13(9), pp. 3405–3414. [CrossRef]


Grahic Jump Location
Fig. 4

Range of motion results for three subjects

Grahic Jump Location
Fig. 3

(a) Device model in neutral position, (b) kinematics model in inverted position, and (c) kinetics model in inverted position

Grahic Jump Location
Fig. 2

Device modules: (a) knee brace, (b) sensor, (c) sensor components, (d) footplate, and (e) user interface



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