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Full-Text Articles in Biomedical Engineering and Bioengineering

Interface Stress In Socket/Residual Limb With Transtibial Prosthetic Suspension Systems During Locomotion On Slopes And Stairs Jan 2015

Interface Stress In Socket/Residual Limb With Transtibial Prosthetic Suspension Systems During Locomotion On Slopes And Stairs

Faculty of Engineering University of Malaya

OBJECTIVE: This study aimed to compare the effects of different suspension methods on the interface stress inside the prosthetic sockets of transtibial amputees when negotiating ramps and stairs. DESIGN: Three transtibial prostheses, with a pin/lock system, a Seal-In system, and a magnetic suspension system, were created for the participants in a prospective study. Interface stress was measured as the peak pressure by using the F-socket transducers during stairs and ramp negotiation. RESULTS: Twelve individuals with transtibial amputation managed to complete the experiments. During the stair ascent and descent, the greatest peak pressure was observed in the prosthesis with the ...


Design And Validation Of A Bi-Axial Loading Bioreactor For Mechanical Stimulation Of Engineered Cartilage, Noor Azuan Jan 2011

Design And Validation Of A Bi-Axial Loading Bioreactor For Mechanical Stimulation Of Engineered Cartilage, Noor Azuan

Noor Azuan

A mechanical-conditioning bioreactor has been developed to provide bi-axial loading to three-dimensional (3D) tissue constructs within a highly controlled environment. The computer-controlled bioreactor is capable of applying axial compressive and shear deformations, individually or simultaneously at various regimes of strain and frequency. The reliability and reproducibility of the system were verified through validation of the spatial and temporal accuracy of platen movement, which was maintained over the operating length of the system. In the presence of actual specimens, the system was verified to be able to deliver precise bi-axial load to the specimens, in which the deformation of every specimen ...