Werner Birgit S, Jacquot Adrien, Molé Daniel, Walch Gilles
Clinic for Shoulder and Elbow Surgery, Bad Neustadt a. d. Saale, Germany; Générale de Santé, Hôpital Jean Mermoz, Centre Orthopédique Santy, Lyon, France.
Orthopaedic and Traumatologic Surgery Department, Centre Chirurgical E. Gallé, Nancy, France.
J Shoulder Elbow Surg. 2016 Sep;25(9):e276-80. doi: 10.1016/j.jse.2016.02.017. Epub 2016 Apr 15.
Reverse shoulder arthroplasty leads to arm lengthening. Different techniques have been described to determine postoperative lengthening. The purpose of this study was to evaluate the reliability of the acromiohumeral distance (AHD) in determining arm lengthening after reverse shoulder arthroplasty.
At 2 centers, 44 patients who had received an onlay design reverse shoulder arthroplasty were observed for a minimum of 6 months. Examination followed a standardized protocol including preoperative and postoperative radiographs on anteroposterior view in neutral rotation. Two orthopedic surgeons independently performed the measurements in random order.
Mean arm lengthening averaged 2.5 cm (range, 0.3-3.9 cm) according to AHD measurement. Significant differences in interobserver and intraobserver variability for postoperative AHD measurements were found (P < .01). The mean intrapatient difference was 0.5 cm (range, 0.02-1.5 cm).
According to our study, the AHD is not a reliable measurement technique to determine arm lengthening after reverse shoulder arthroplasty.
反肩关节置换术会导致手臂延长。已经描述了不同的技术来确定术后延长情况。本研究的目的是评估肩峰肱骨距离（AHD）在确定反肩关节置换术后手臂延长方面的可靠性。
在2个中心，对44例行嵌体设计反肩关节置换术的患者进行了至少6个月的观察。检查遵循标准化方案，包括中立旋转位前后位的术前和术后X线片。两名骨科医生以随机顺序独立进行测量。
根据AHD测量，平均手臂延长为2.5厘米（范围为0.3 - 3.9厘米）。术后AHD测量的观察者间和观察者内变异性存在显著差异（P <.01）。患者内平均差异为0.5厘米（范围为0.02 - 1.5厘米）。
根据我们的研究，AHD不是确定反肩关节置换术后手臂延长的可靠测量技术。
