Journal of Rehabilitation Research & Development (JRRD)

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Volume 49 Number 2, 2012
   Pages 227 — 240

Abstract — Effect of prosthetic gel liner thickness on gait biomechanics and pressure distribution within the transtibial socket

Erin Boutwell, MS;1–2* Rebecca Stine, MS;1,3 Andrew Hansen, PhD;1,4 Kerice Tucker, BS;1 Steven Gard, PhD1–3

1Northwestern University Prosthetics-Orthotics Center for Education and Research, Department of Physical Medicine and Rehabilitation, Feinberg School of Medicine, Northwestern University, Chicago, IL; 2Department of Biomedical Engineering, McCormick School of Engineering and Applied Science, Northwestern University, Evanston, IL; 3Jesse Brown Department of Veterans Affairs (VA) Medical Center, Chicago, IL; 4Minneapolis VA Health Care System, ??Minneapolis, MN

Abstract–Prosthetic gel liners are often prescribed for persons with lower-limb amputations to make the prosthetic socket more comfortable. However, their effects on residual limb pressures and gait characteristics have not been thoroughly explored. This study investigated the effects of gel liner thickness on peak socket pressures and gait patterns of persons with unilateral transtibial amputations. Pressure and quantitative gait data were acquired while subjects walked on liners of two different uniform thicknesses. Fibular head peak pressures were reduced (p = 0.04) with the thicker liner by an average of 26 +/– 21%, while the vertical ground reaction force (GRF) loading peak increased 3 +/– 3% (p = 0.02). Most subjects perceived increased comfort within the prosthetic socket with the thicker liner, which may be associated with the reduced fibular head peak pressures. Additionally, while the thicker liner presumably increased comfort by providing a more compliant limb-socket interface, the higher compliance may have reduced force and vibration feedback to the residual limb and contributed to the larger vertical GRF loading peaks. We conclude that determining optimal gel liner thickness for a particular individual will require further investigations to better identify and understand the compromises that occur between user perception, residual-limb pressure distribution, and gait biomechanics.

Key words: artificial limbs, gait analysis, gel liner, interface pressure, pin suspension, pressure sensors, prosthesis, rehabilitation, residual limb, transtibial amputee.


View HTML  ¦  View PDF  ¦  Contents Vol. 49, No. 2
This article and any supplementary material should be cited as follows:
Boutwell E, Stine R, Hansen A, Tucker K, Gard S. Effect of prosthetic gel liner thickness on gait biomechanics and pressure distribution within the transtibial socket. J Rehabil Res Dev. 2012;49(2):227–40.
http://dx.doi.org/10.1682/JRRD.2010.06.0121
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Last Reviewed or Updated  Wednesday, April 4, 2012 12:33 PM

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