Low C K, Vartany A, Diao E
Department of Orthopaedic Surgery, University of California, San Francisco, USA.
J Hand Surg Am. 1997 Sep;22(5):897-900. doi: 10.1016/S0363-5023(97)80087-1.
A controlled, randomized single-blinded study was performed on the thumbs and little fingers of 20 cadaver hands. The digits were randomly divided into 2 groups. In the transthecal group, 2 mL of 0.5% methylene blue was injected into the tendon sheath at the A1 pulley. In the subcutaneous group, the same amount of dye was injected into the subcutaneous tissue superficial to the A1 pulley. The injections were performed by 2 investigators. They exchanged specimens and performed dissections on the injected digits without knowledge of which technique had been used. The distributions of dye along the digit and the color intensity of the dye on the digital nerves were studied. There was no significant difference (p > .05) between results for the 2 techniques. It was expected that both techniques would result in similar anesthetic distribution in the clinical setting. In the transthecal group, intra-articular staining of the metacarpophalangeal joint was noted in 3 little fingers and 1 thumb. This complication did not occur in the subcutaneous group. This difference was significant (p < .05).
对20具尸体手部的拇指和小指进行了一项对照、随机单盲研究。这些手指被随机分为两组。在经腱鞘组中，将2毫升0.5%的亚甲蓝注入A1滑车处的腱鞘内。在皮下组中，将等量的染料注入A1滑车表面的皮下组织。注射由两名研究者进行。他们交换标本并对注射的手指进行解剖，而不知道使用的是哪种技术。研究了染料沿手指的分布以及染料在指神经上的颜色强度。两种技术的结果之间没有显著差异（p>.05）。预计在临床环境中两种技术都会导致相似的麻醉分布。在经腱鞘组中，3根小指和1根拇指出现了掌指关节的关节内染色。皮下组未出现这种并发症。这种差异具有显著性（p<.05）。
