Concepts of Pressure in an Ischial Containment Socket: Measurement

Document Type

Article

Publication Date

2005

Publication Title

Journal of Prosthetics and Orthotics

Volume

17

Issue

1

First page number:

2

Last page number:

11

Abstract

The goal of this study was to develop a methodology for obtaining and mapping the pressures occurring inside a "comfortable" ischial containment socket during gait for later use in studies of the perception of pressure magnitude. F-Socket (Tekscan, Inc., South Boston, MA) was used to obtain the pressure measurements for a single subject, and pressure maps displaying the dynamics of socket pressure during gait in the muscle compartments and high pressure regions of the socket were developed by windowing regions of the sensor and taking average pressures over five steps during gait. Data for the muscle compartments were plotted as splines using polar coordinates for loading response, midstance, terminal stance, and midswing. Data for regions of higher pressure concentration were plotted as points using polar coordinates. The maps revealed patterns that were in general agreement with those hypothesized by Radcliffe (Radcliffe CW. Prosthetics. In: Rose J, Gamble JG, eds. Human Walking . Baltimore: Williams & Wilkins, 1994:168–173.) to maintain anterior-posterior stability of the knee and medial-lateral stability of the pelvis, but some differences were found. Pressures in the distal compartments are hypothesized to have been influenced by downward movement of the femur and proximal tissues during gait and the morphology of the residual limb, which had fairly mobile adipose tissues distally. Data suggest a "quasi-hydrostatic" form of loading may have occurred distally, which would occur only in a snug-fitting socket. The mappings provided valuable insight into the dynamics of the socket.

Keywords

Hydrostatic pressure--Measurement; Pressure—Measurement; Prosthesis

Disciplines

Biomedical Devices and Instrumentation | Civil and Environmental Engineering | Orthotics and Prosthetics

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

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