Wong YC, Cheong PM, Chung
OM, Wai YL
Department of Orthopaedics and Traumatology, Yan Chai Hopsital,Hong Kong.
Inequality in leg length following total hip arthroplasty is an increasing concern for patients. This retrospective study aimed to evaluate the method of measuring the head to lesser trochanter distance and neck cut during pre-operative radiographic planning to achieve leg-length equality. From 1994 to 1997, 39 patients underwent total hip arthroplasty at the Yan Chai hospital. Five were excluded due to surgical revision or lack of lesser trochanter, or because the patient was awaiting surgery for the opposite hip. Of the 34 patients included, 17 patients underwent surgery without suing the intraoperative measurement method (Group A), and 17 patients had surgery using the method (Group B). Postoperatively, 9(53.0%) of patients in Group A and 13(76.0%) of patients in Group B had equal leg length. Leg-length equality can thus be achieved following most primary total hip arthroplasties with careful preoperative planning using a template and without an increased risk of dislocation. (Hong Kong j. orthop. surg. 2001;5(1):18-23)
Key Words: Arthroplasty, replacement, hip/adverse effects; Intraoperative care; Leg-length inequality, radiography; Postoperative complications
全髖關節置換術後的腿長差異是一個備受關注的課題。本回顧研究評估利用術前Ｘ射線量度股骨頭至小粗隆距離及股骨頸切口以達至對等腿長的方法。自1994年至1997年，本院共進行了39例全髖關節置換手術，其中五例因為翻修、缺乏小粗隆及對側髖關節等候手術的原因而剔除。不採用上述方法共17例 (Ａ組) ，採用的有17例 (B組) 。手術後，Ａ組有53.0%及Ｂ組有76.0%達至對等腿長。作者總結透過術前樣版小心計劃，可在大部份首次全髖關節置換手術達至對等腿長而不會增加脫臼的風險。
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