Biomechanical gait analysis for a hip disarticulation prosthesis: power source for the swing phase of a hip disarticulation prosthetic limb.
Tsukasa Kawaguchi, Takumi Yamada, Kodai Iwashita
PMID 37131355WHAT IT FOUND
In hip prosthesis walking, the measured lower back power was very small.
The unaffected hip showed extension moment and power during stance and swing, and the authors concluded that unaffected hip extension drove prosthetic swing.
Key findings
01The lumbar spine power was less than 0.003 W/kg for the entire gait cycle.
02The unaffected hip showed an extension moment of 1 Nm/kg in early stance and hip power of 0.8 W/kg in early swing.
03The prosthesis-side hip flexed to a maximum angle of 17° during the swing phase.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only six prosthesis users were studied, and they were all men. The prosthesis group had a mean age of 44.3 years, while the control group had a mean age of 20.8 years. The study did not standardize age, physical function, or prosthetic leg parts. Two participants walked with a T-cane, which may have changed their gait pattern. Participants were K2 or higher ambulators, so results may not apply to less mobile prosthesis users. The results are limited to the participants in this study.
Declared interests
The authors declared no conflicts of interest directly relevant to the article.
The easy way to misread this
Do not conclude that lumbar spine movement powers prosthetic swing. The measured lumbar power was less than 0.003 W/kg, while the unaffected hip showed an extension moment of 1 Nm/kg in early stance and power of 0.8 W/kg in early swing.