Clinical significance of leg-length inequality after total hip arthroplasty.
Sixty-eight patients were interviewed and examined after total hip arthroplasty (THA) to determine the clinical consequences (patient satisfaction, shoe lift use, gait abnormalities, etc) of leg-length inequality. No patient met clinical or radiographic criteria for revision THA. Minimum follow-up was 2 years, and average follow-up was 6.6 years (range, 2 to 20.5 years). A questionnaire, with specific questions about leg-length inequality, was completed by each patient. Leg-length inequality was determined by orthoroentgenography and compared with clinical measurements of leg length. The average inequality in this series of patients was 9.7 mm. A significant number (32%) of patients were aware of this inequality; the average leg-length inequality in this group was 14.9 mm. More than half of these patients were disturbed by the inequality. The magnitude of leg-length inequality closely correlated with awareness of the inequality, abnormal gait, use of ambulatory assistive devices, the need for a shoe lift, prior leg-length inequality, and revision THA. Clinical measures of leg-length inequality correlated poorly with values determined orthoroentgenographically. The high rate of dissatisfaction among patients with a leg-length inequality and the untoward results associated with this inequality indicate that surgeons performing THA should familiarize themselves with a reliable method for equalizing leg lengths intraoperatively.
Edeen
J
J
Department of Orthopaedic Surgery, Naval Medical Center, Oakland, California, USA.
Sharkey
P F
PF
Alexander
A H
AH
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005684:Gait; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D007870:Leg Length Inequality / Q000209:etiology* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D012189:Retrospective Studies