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Perception of imposed leg length inequality in normal subjects.
- Source :
-
Hip International . Oct-Dec2010, Vol. 20 Issue 4, p505-511. 7p. - Publication Year :
- 2010
-
Abstract
- Lower limb length differences of up to 10mm exist in 60% - 95% of the population. There are usually no symptoms or functional effects. Following Total Hip Arthroplasty (THA), satisfactory clinical results can be spoiled by dissatisfaction due to a change in leg length. Although the change in leg length may be modest in comparison to the normal variation, the patient may perceive this as a leg length discrepancy. To study the average threshold for perception, artificial leg length discrepancies of 5 mm to 25 mm were created in 30 young healthy adults using calibrated wooden blocks. Responses were recorded and analysed using a chi-squared test for independence and an independent measures t-test. Awareness of leg length discrepancy was related to the magnitude of the discrepancy (χ2 (15)= 156.6, p<0.05 on the right side, and χ2 (15)= 178.725 p<0.05 on the left side). It was shown that no subject reported a 5mm increase in leg length to be uncomfortable while all subjects were aware of leg length discrepancies of 20 mm and 25 mm. When there was a discrepancy of 10 mm in either lower limb, 29 out of 30 subjects (96.7%) thought there was a difference in leg length. Consequently it is suggested that during total hip arthroplasty the surgeon should aim for a leg length discrepancy of less than 10 mm. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11207000
- Volume :
- 20
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Hip International
- Publication Type :
- Academic Journal
- Accession number :
- 103808676