The Effect of Elevated Vacuum Suspension on Axial Bone-Socket Displacement in Persons with a Traumatic Transtibial Amputation
Abstract
Following transtibial amputation prosthetic sockets must transfer forces from the distal prosthetic components to the residual limb in a way that will not damage the soft tissue. During walking the residual limb is cyclically loaded and unloaded producing axial bone-socket motion and undesirable shear forces on the skin of the residual limb. Commonly referred to as pistoning, in active individuals the axial motion can quickly lead to breakdown of the skin in areas along bony prominences and adjacent to skin grafts . Elevated vacuum suspension systems, which use mechanical or electric pumps to draw air from the socket, may maintain bone-socket position better than passive suction sockets. However, limitations in the study designs and radiographic techniques make interpreting the results difficult. Digital Video Fluoroscopy (DVF) offers potential advantages over previous techniques and has been shown to be reliable for assessing motion. The objective of this study was to determine the effect of elevated vacuum on axial bone-socket motion in persons with a traumatic transtibial amputation (TTA) using DVF.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2011
- Accession Number
- ADA547971
Entities
People
- Benjamin J Darter
- Jason M. Wilken
- Kiril Sinitski