Thakral Rishi, Johnson Aaron J, Specht Stacy C, Conway Janet D, Issa Kimona, Mont Michael A, Herzenberg John E
Orthopedics. 2014 Feb;37(2):101-6. doi: 10.3928/01477447-20140124-06.
Limb-length discrepancy after total hip arthroplasty (THA) leads to patient dissatisfaction and can be a cause of orthopedic surgery malpractice cases. Nonsurgical and surgical techniques exist to correct limb-length discrepancies. Two limb-lengthening methods were used to correct greater than 2-cm limb-length discrepancies after THA: lengthening over a femoral nail with an external fixator and lengthening with an intramedullary kinetic skeletal distractor. These techniques achieved equal length in less than 4 weeks, with both resulting in a healed distraction gap within 4 months. No patient had loss of proximal or distal joint motion, and mean Harris Hip Score was 90 points at final follow-up. No surgical complications were reported with the intramedullary skeletal kinetic distractor. Limb lengthening using an intramedullary skeletal kinetic distractor is a viable treatment option resulting in reliable lengthening, healing of the distraction gap, and progression to full weight bearing.
全髋关节置换术（THA）后肢体长度差异会导致患者不满，并且可能成为骨科手术医疗事故案件的一个原因。存在非手术和手术技术来纠正肢体长度差异。两种肢体延长方法被用于纠正THA后大于2厘米的肢体长度差异：使用外固定器在股骨钉上延长以及使用髓内动力性骨骼撑开器延长。这些技术在不到4周的时间内实现了等长，两者均在4个月内使撑开间隙愈合。没有患者出现近端或远端关节活动丧失，最终随访时平均Harris髋关节评分90分。使用髓内动力性骨骼撑开器未报告手术并发症。使用髓内动力性骨骼撑开器进行肢体延长是一种可行的治疗选择，可实现可靠的延长、撑开间隙的愈合以及进展至完全负重。
