Related Experiment Videos
Oxygen consumption during ambulation: comparison of using a prosthesis fitted with and without a tele-torsion device
John G Buckley1, Steven F Jones, Karen M Birch
1Biomechanics Research Group, Department of Exercise and Sport Science, Manchester Metropolitan University, Hassall Road, Alsager, Stoke-on-Trent ST2 2HL, UK. j.buckley@mmu.ac.uk
Objective:
To determine the energy expenditure and subjective comfort rating of walking in transtibial amputee patients using their prosthesis fitted either with or without a tele-torsion device (TT Pylon).
Design:
Randomized, before-after trial.
Setting:
Gait laboratory.
Participants:
Six men, moderately active, with unilateral transtibial amputation (mean age, 39.5 +/- 9.9y).
Intervention:
Subjects walked on a motorized treadmill using their prosthesis fitted either with (ProsWith) or without (ProsWithout) a TT Pylon. Trials were repeated with subjects walking at speeds 100%, 130%, and 160% of their "normal" pace.
Main Outcome Measures:
The energy expended (VO(2)) and subjective comfort rating during each walking trial.
Results:
VO(2) during walking with the prosthesis fitted with the TT Pylon was 5.4% and 9.1% lower than when using the prosthesis without the TT Pylon, at the speeds 130% and 160% of normal, respectively. Findings at the speed 160% greater than normal were significant (P <.05). Two of the subjects perceived no difference in prosthetic comfort between ProsWith and ProsWithout. The other 4 subjects preferred the TT Pylon at all speeds.
Conclusion:
Use of a TT Pylon can significantly reduce the energy expenditure of walking at speeds above normal.