抄録
We investigated the possibility of neurovascular compression in the costoclavicular space during provocative positions for thoracic outlet syndrome by measuring the pressure applied to the brachial plexus and subclavian artery. 16 shoulders from 8 fresh-frozen thorax-upper extremity human cadavers without any obvious anatomical abnormalities were used. The pressure on brachial plexus and subclavian artery between the clavicle and 1st rib were measured using a thin pressure sensor in each of 4 provocative positions; shoulder depression, alternate Eden, throwing, and the Wright. Nerve compression (2.87±3.13 N/cm 2) was seen in 4 out of 8 specimens in the Wright position. The occurrence rate was significantly higher when compared to the other 3 provocative positions (p < 0.05). The occurrence rate of artery compression also tended to be higher for the Wright position, but no significant difference was seen. Compression of brachial plexus in the costoclavicular space is possible to occur in the Wright position.
