Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31949
Title: Pressure distribution at the stump/socket interface in transtibial amputees during walking on stairs, slope and non-flat road
Authors: Dou, P
Jia, X
Suo, S
Wang, R
Zhang, M 
Keywords: Below-knee amputee
Non-flat road
Pressure
Prosthetic socket interface
Slope
Stairs
Issue Date: 2006
Publisher: Elsevier Sci Ltd
Source: Clinical biomechanics, 2006, v. 21, no. 10, p. 1067-1073 How to cite?
Journal: Clinical Biomechanics 
Abstract: Background: Studies examining the stump/socket interface stresses have been restricted to unsupported stance and natural gait, i.e. walking at a comfortable speed on flat and straight walkway. However, the pressure behaviour as to the interface in unilateral transtibial amputees during walking on stairs, slope and non-flat road is unclear. Methods: Pressure distribution changes at multiple points, expressed as mean peak stump/socket interface pressure, mean pressure level over 90% of peak pressure, time in which pressure exceeded 90% of peak pressure and time-pressure integral at the period of sustained sub-maximal load, were measured during natural ambulating and walking on stairs, slope and non-flat road. Findings: Compared with natural gait, the mean peak pressure and sustained sub-maximal load increase notably over the patellar tendon during walking on stairs and non-flat road, and however decrease or change insignificantly at the patellar tendon on slope and over other measured areas in all conditions; moreover the time period of sustained sub-maximal load changes remarkably, except over the patellar tendon during walking up slope and over the popliteal area on non-flat road; finally, the time-pressure integral in the time period of sustained sub-maximal load changes considerably, except at the patellar tendon during walking up slope. Interpretation: The pressure characteristics during natural ambulating seem not to be highly predictive of what occurs in the conditions of walking on stairs, slope and non-flat road, which leads to significant increase in amplitude domain of tissue loading only at the patellar tendon, and however to remarkable changes in temporal sequences of tissue (un-)loading almost in all measured regions.
URI: http://hdl.handle.net/10397/31949
ISSN: 0268-0033
DOI: 10.1016/j.clinbiomech.2006.06.004
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