Purpose/objectives: The goal of this project is to create a test center
to characterize existing and emerging interface liner materials
used in external prosthetics. Testing techniques we develop and
We gratefully acknowledge funding from the National Institutes of Health, R01HD-065766.
#1: Sanders JE, Cagle JC, Harrison DC, Karchin A. Amputee stump socks: How does sock ply
correlate with sock thickness? Prosthet Orthot Int. 2012; 36(1): 77-86. PMID: 22228614.
#2: Sanders JE, Nicholson BS, Zachariah SG, Cassisi DV, Karchin A, Fergason JR. Testing of
elastomeric liners used in limb prosthetics: classification of 15 products by mechanical
performance. J Rehabil Res Dev. 2004 Mar; 41(2): 175-86. PMID:15558371.
#3: Sanders JE, Cassisi DV. Mechanical performance of inflatable inserts used in limb
prosthetics. J Rehabil Res Dev. 2001 Jul-Aug; 38(4): 365-74. PMID:11563488.
#4: Sanders JE, Greve JM, Mitchell SB, Zachariah SG. Material properties of commonly-used
interface materials and their static coefficients of friction with skin and socks. J Rehabil Res
Dev. 1998 Jun; 35(2): 161-76. PMID:9651888.
Recent meetings presentations:
A: Amputee socks: How does sock ply relate to sock thickness? American Academy of
Orthotists and Prosthetists 38th Academy Annual Meeting and Scientific Symposium,
Atlanta, Georgia, 2012
collect are available on the web at site:
http://depts.washington.edu/plpa. The project is intended to
enhance the practitioner's toolchest by providing information
about how liners interact with residual limb soft tissues and
how liners mechanically differ from one other. This information
should help practitioners select appropriate liners for their
patients. The materials testing center should also be helpful to
companies by providing detailed engineering characterizations
of their existing and emerging products.
Findings to date: Practitioner feedback from our previous reports
testing elastomers, foams, and others materials [#1, #3] has
been key towards the current effort. We are creating tests to
characterize liner material: compressive cushioning, shear
cushioning, suspension, adherence, volume accommodation,
breathability, thermal conductivity, and durability. Results will
be presented in an easy to understand format (see above).