Oxygen consumption during ambulation: comparison of using a prosthesis fitted with and without a tele-torsion device.
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).


METHODS
Randomized, before-after trial.


METHODS
Gait laboratory.


METHODS
Six men, moderately active, with unilateral transtibial amputation (mean age, 39.5 +/- 9.9y).


METHODS
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.


METHODS
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.


CONCLUSIONS
Use of a TT Pylon can significantly reduce the energy expenditure of walking at speeds above normal.
Buckley
John G
JG
Biomechanics 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
Jones
Steven F
SF
Birch
Karen M
KM
D000328:Adult; D001186:Artificial Limbs; D004734:Energy Metabolism / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000502:physiology*; D011474:Prosthesis Design; D017755:Prosthesis Fitting; D016138:Walking / Q000502:physiology
D010100:Oxygen