AUVA-Rehabilitation Clinic Tobelbad, Tobelbad, Austria.
Department of Trauma Surgery, State Hospital Feldbach-Fürstenfeld, Ottokar-Kernstock-Straße 18, 8330, Feldbach, Austria.
Eur J Trauma Emerg Surg. 2023 Feb;49(1):299-306. doi: 10.1007/s00068-022-02063-1. Epub 2022 Jul 24.
To project the distance between the tip of the greater tubercle (GT), respectively, the proximal border of the tip of the coracoid process (CP) and the entry point of the coracobrachialis by the musculocutaneous nerve (MCN) proportionally onto the humeral length.
Sixty-six upper extremities were included in the study. The distance between the tip of the GT and the distal tip of the lateral humeral epicondyle (LE) was evaluated as the humeral length (HL). The interval between the tip of the GT and the entry point of the coracobrachialis muscle by the MCN was measured. The distance between the proximal border of the tip of the CP and the distal portion of the medial humeral epicondyle (ME) and the entry point of the MCN into the coracobrachialis were evaluated. Proportions were used to project the entry point of the coracobrachialis by the MCN along the HL, respectively, the interval between the proximal border of the tip of the CP and the distal tip of the ME.
The entry point of the MCN into the coracobrachialis muscle can be expected at an interval between 14.9 and 33.9% of the HL (between the tip of the GT and the LE), starting from the tip of the GT. Regarding the reference line between the proximal border of the CP and the ME, the nerve's entry point was located between 14.2 and 34.4%, starting from the CP.
Results represent easily applicable intervals for intraoperative localisation of the MCN.
通过肌皮神经（MCN）将大结节尖端（GT）、喙突尖端近端边缘（CP）与喙肱肌入肌点之间的距离成比例地投射到肱骨长度上。
本研究纳入了 66 例上肢。评估 GT 尖端与肱骨外侧髁远端尖端之间的距离作为肱骨长度（HL）。测量 GT 尖端与 MCN 进入喙肱肌之间的间隔。评估 CP 尖端近端边缘与肱骨内侧髁远端部分和 MCN 进入喙肱肌的入肌点之间的距离。使用比例将 MCN 进入喙肱肌的入肌点沿 HL 分别投射到 CP 尖端近端边缘与 ME 远端尖端之间的间隔。
MCN 进入喙肱肌的入肌点可预期位于 HL 的 14.9%至 33.9%（GT 尖端与 LE 之间）处，从 GT 尖端开始。关于 CP 和 ME 之间的参考线，神经的入肌点位于 CP 开始的 14.2%至 34.4%处。
结果代表术中 MCN 定位的易于应用的间隔。
