title: Transtibial prosthetic suspension: less pistoning versus easy donning and doffing.
abstract: Poor suspension increases slippage of the residual limb inside the socket during ambulation. The main purpose of this article is to evaluate the pistoning at the prosthetic liner-socket interface during gait and assess patients' satisfaction with two different liners. Two prostheses with seal-in and locking liners were fabricated for each of the 10 subjects with transtibial amputation. The Vicon motion system was used to measure the pistoning during gait. The subjects were also asked to complete a Prosthesis Evaluation Questionnaire. The results revealed higher pistoning inside the socket during gait with the locking liner than with the seal-in liner (p < 0.05). The overall satisfaction with the locking liner was higher (p < 0.05) because of the relative ease with which the patients could don and doff the device. As such, pistoning may not be the main factor that determines patients' overall satisfaction with the prosthesis and other factors may also contribute to comfort and satisfaction with prostheses. The article also verifies the feasibility of the Vicon motion system for measuring pistoning during gait.
authors: Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia. gholizadeh@um.edu.my
authors: Hossein
authors: H
authors: Gholizadeh
authors: Noor Azuan
authors: NA
authors: Abu Osman
authors: Arezoo
authors: A
authors: Eshraghi
authors: Sadeeq
authors: S
authors: Ali
authors: Stefan Karl
authors: SK
authors: Sævarsson
authors: Wan Abu Bakar
authors: WA
authors: Wan Abas
authors: Gholam Hossein
authors: GH
authors: Pirouzi
mesh_terms: D000328:Adult; D000368:Aged; D000672:Amputation Stumps; D001186:Artificial Limbs; D005684:Gait; D006801:Humans; D007866:Leg; D008875:Middle Aged; D017060:Patient Satisfaction; D011474:Prosthesis Design; D013314:Stress, Mechanical; D011795:Surveys and Questionnaires; D013977:Tibia; D016138:Walking; D055815:Young Adult