Hohenberger Gloria Maria, Schwarz Angelika Maria, Grechenig Peter, Maier Marco Johannes, Schwarz Ulrike, Kuchling Sabine, Gänsslen Axel, Weiglein Andreas Heinrich
Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria.
AUVA Trauma Hospital Styria I Graz, Göstinger Straße 24, 8020 Graz, Austria.
Indian J Orthop. 2020 Mar 14;54(Suppl 1):188-192. doi: 10.1007/s43465-020-00084-9. eCollection 2020 Sep.
Posterior interosseous nerve (PIN) entrapment syndrome is a rare condition and is predisposed by anatomical factors such as narrow passages through fibrous arcades; whereas, the Arcade of Frohse (AF) is the most common entrapment point. The aim of this study was to evaluate the entrance and exit points of the PIN into the supinator in detail.
One hundred unpaired upper extremities underwent dissection. The PIN's entrance and exit points from the supinator were depicted. The distances between the tip of the radial head (RH) and the AF and the exit point of the PIN from the supinator were measured. Further, it was checked if the borders of the AF and the exit point were muscular, tendinous or a combination of these.
The interval between the PIN's entry into the supinator and the tip of the RH was at a mean of 28.9 mm. Concerning the border of the AF, in 54 cases a muscular and in 46 specimens a tendinous version could be observed. The interval between the exit point of the PIN and the tip of the RH proved to be at a mean of 64.2 mm. Further, the exit's border was muscular in 65 specimens and tendinous in 35 cases.
During surgical treatment of the PIN syndrome, it needs to be kept in mind that approximately one-third of all patients might also suffer from entrapment at the exit point of the PIN.
骨间后神经（PIN）卡压综合征是一种罕见疾病，易受诸如通过纤维弓的狭窄通道等解剖因素影响；而弗罗瑟弓（AF）是最常见的卡压点。本研究的目的是详细评估PIN进入旋后肌的入口和出口点。
对100例未配对的上肢进行解剖。描绘PIN从旋后肌的入口和出口点。测量桡骨头（RH）尖端与AF以及PIN从旋后肌出口点之间的距离。此外，检查AF的边界和出口点是肌肉性、腱性还是两者的组合。
PIN进入旋后肌与RH尖端之间的间距平均为28.9毫米。关于AF的边界，在54例中可观察到肌肉性版本，在46个标本中可观察到腱性版本。PIN出口点与RH尖端之间的间距平均为64.2毫米。此外，在65个标本中出口边界为肌肉性，在35例中为腱性。
在PIN综合征的手术治疗过程中，需要记住，所有患者中约有三分之一可能在PIN出口点也存在卡压情况。
