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The effect of different knee angles on knee volume measured with the Perometer (R) device in uninjured subjects

Research output: Contribution to journalArticle

I O W Man, S M Elsabagh, M C Morrissey

Original languageEnglish
Pages (from-to)114 - 119
Number of pages6
Issue number2

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  • King's College London


The Perometer(R) is an optoelectronic device used to calculate limb volume. However, knee angle effect on knee volume during a Perometer measurement has not been reported. This could be a potential confounding factor in assessing knee volume in subjects with impaired knee mobility and where volume measurements are taken over time. To address this issue, bilateral knee volume measurements were recorded from 20 uninjured subjects in seven different knee angles from 0-60degrees flexion. All 40 knees were not measured in all seven angles because of obstruction of the measurement frame when some knees were in 50degrees and 60degrees flexion. Thus, the volume data was separated into three subgroups for analysis: 40 knees at knee flexion angles 0, 10, 2 0, 3 0 and 40degrees; 3 6 knees at 50degrees; and 16 knees at 60degrees. Repeated measures analysis of variance showed a statistically significant difference between the volume measurements in the three subgroups: 0-40degrees knee flexion [F-(4,F-156) = 35(.)146, P

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