Alexander Thomas, Azar Frederick M, Mauck Benjamin, Smith Richard, Throckmorton Thomas W
Department of Orthopaedic Surgery and Biomedical Engineering, University of Tennessee-Campbell Clinic, Memphis, TN.
Am J Orthop (Belle Mead NJ). 2015 Feb;44(2):73-6.
In 84 patients (85 elbows), a standard goniometer was used to measure elbow flexion and extension with the forearm in 2 positions: full supination (humeral condyles parallel to floor) and neutral forearm rotation (ulnohumeral joint in relative internal rotation). All measurements were made by the same surgeon with a standardized technique. Mean absolute difference in elbow extension measurements was 8°. There was no difference in flexion between measurement positions. Mean difference between neutral and supinated measurements was 6° in extension. There was no difference in flexion for patients with contractures between 0° and 29°. In patients with flexion contractures of more than 30°, mean difference between neutral and supinated measurements was 12° in extension; there was no difference in flexion. Elbow goniometer extension measurements taken in neutral humeral rotation underestimated the degree of elbow hyperextension and elbow flexion contracture. We recommend taking elbow flexion arc measurements in the true plane of motion, with the humerus externally rotated by fully supinating the forearm, such that the distal humeral condyles are parallel to the floor.
在84例患者（85个肘关节）中，使用标准测角器在前臂处于2种位置时测量肘关节的屈伸：前臂完全旋后（肱骨髁与地面平行）和前臂中立位旋转（尺肱关节处于相对内旋位）。所有测量均由同一位外科医生采用标准化技术进行。肘关节伸展测量的平均绝对差值为8°。测量位置之间的屈曲度无差异。中立位和旋后位测量在伸展时的平均差值为6°。挛缩在0°至29°之间的患者，其屈曲度无差异。在屈曲挛缩超过30°的患者中，中立位和旋后位测量在伸展时的平均差值为12°；屈曲度无差异。肱骨中立位旋转时进行的肘关节测角器伸展测量低估了肘关节过伸和屈曲挛缩的程度。我们建议在前臂完全旋后使肱骨远端髁与地面平行，即在真正的运动平面内测量肘关节屈曲弧。
