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Residual rotation of forearm amputation: cadaveric study.
BMC Musculoskeletal Disorders ( IF 2.2 ) Pub Date : 2020-01-18 , DOI: 10.1186/s12891-020-3050-x
Geon Lee 1 , Sung-Jae Kim 2 , Joo Hyung Ha 3 , Chang-Hun Lee 4 , Young Jin Choi 1 , Kwang-Hyun Lee 4
Affiliation  

BACKGROUND The purpose of this study was to investigate residual rotation of patients with forearm amputation and the contribution of involved muscle to residual rotation. METHODS Testing was performed using five fresh-frozen cadaveric specimens prepared by isolating muscles involved in forearm rotation. Amputation was implemented at 25 cm (wrist disarticulation), 18 cm, or 10 cm from the tip of olecranon. Supination and pronation in the amputation stump were simulated with traction of involved muscle (supinator, biceps brachii, pronator teres, pronator quadratus) using an electric actuator. The degree of rotation was examined at 30°, 60°, 90°, and 120° in flexion of elbow. RESULTS Average rotation of 25 cm forearm stump was 148° (SD: 23.1). The rotation was decreased to 117.5° (SD: 26.6) at 18 cm forearm stump. It was further decreased to 63° (SD 31.5) at 10 cm forearm stump. Tendency of disorganized rotation was observed in close proximity of the amputation site to the elbow. Full residual pronation was achieved with traction of each pronator teres and pronator quadratus. Although traction of supinator could implement residual supination, the contribution of biceps brachii ranged from 4 to 88% according to the degree of flexion. CONCLUSIONS Close proximity of the amputation site to the elbow decreased the residual rotation significantly compared to residual rotation of wrist disarticulation. The preservation of pronosupination was 80% at 18 cm forearm stump. Although the pronator teres and the pronator quadratus could make a full residual pronation separately, the supinator was essential to a residual supination.

中文翻译:

前臂截肢的残余旋转:尸体研究。

背景技术本研究的目的是研究前臂截肢患者的残余旋转以及所累及的肌肉对残余旋转的影响。方法使用五个新鲜冷冻的尸体标本进行测试,这些标本是通过分离与前臂旋转有关的肌肉制备的。在距鹰嘴尖端25厘米(腕关节脱节),18厘米或10厘米处进行截肢。截肢残端的旋前和旋前用电动致动器的牵拉模拟了牵涉肌肉(旋肌,肱二头肌,旋肌,旋肌)。在30°,60°,90°和120°弯肘时检查旋转度。结果前臂残端25 cm的平均旋转角度为148°(SD:23.1)。在18 cm前臂残端处旋转降低至117.5°(SD:26.6)。前臂残端10 cm处进一步降低至63°(SD 31.5)。在截肢部位到肘部附近,观察到旋转混乱的趋势。通过牵引每个前叉畸形肌和前叉正交肌实现完全的前旋内旋。尽管旋后肌的牵引可以实现残余旋后,但根据屈曲程度,肱二头肌的贡献范围为4%至88%。结论与手腕关节的残余旋转相比,截肢部位与肘部的紧密靠近显着降低了残余旋转。前臂残端在18 cm处的前代异化保留率为80%。尽管pronator teres和pronator quadratus可以分别做出完整的残留旋前,但旋后肌对于残留旋后至关重要。在截肢部位到肘部附近,观察到旋转混乱的趋势。通过牵引每个前叉畸形肌和前叉正交肌实现完全的前旋内旋。尽管旋后肌的牵引可以实现残余旋后,但根据屈曲程度,肱二头肌的贡献范围为4%至88%。结论与手腕关节的残余旋转相比,截肢部位与肘部的紧密靠近显着降低了残余旋转。前臂残端在18 cm处的前代异化保留率为80%。尽管pronator teres和pronator quadratus可以分别做出完整的残留旋前,但旋后肌对于残留旋后至关重要。在截肢部位到肘部附近,观察到旋转混乱的趋势。通过牵引每个前叉畸形肌和前叉正交肌实现完全的前旋内旋。尽管旋后肌的牵引可以实现残余旋后,但根据屈曲程度,肱二头肌的贡献范围为4%至88%。结论与手腕关节的残余旋转相比,截肢部位与肘部的紧密靠近显着降低了残余旋转。前臂残端在18 cm处的前代异化保留率为80%。尽管pronator teres和pronator quadratus可以分别做出完整的残留旋前,但旋后肌对于残留旋后至关重要。通过牵引每个前叉畸形肌和前叉正交肌实现完全的前旋内旋。尽管旋后肌的牵引可以实现残余旋后,但根据屈曲程度,肱二头肌的贡献范围为4%至88%。结论与手腕关节的残余旋转相比,截肢部位与肘部的紧密靠近显着降低了残余旋转。前臂残端在18 cm处的前代异化保留率为80%。尽管pronator teres和pronator quadratus可以分别做出完整的残留旋前,但旋后肌对于残留旋后至关重要。通过牵引每个前叉畸形肌和前叉正交肌实现完全的前旋内旋。尽管旋后肌的牵引可以实现残余旋后,但根据屈曲程度,肱二头肌的贡献范围为4%至88%。结论与手腕关节的残余旋转相比,截肢部位与肘部的紧密靠近显着降低了残余旋转。前臂残端在18 cm处的前代异化保留率为80%。尽管pronator teres和pronator quadratus可以分别做出完整的残留旋前,但旋后肌对于残留旋后至关重要。根据屈曲程度,肱二头肌的贡献范围为4%至88%。结论与手腕关节的残余旋转相比,截肢部位与肘部的紧密靠近显着降低了残余旋转。前臂残端在18 cm处的前代异化保留率为80%。尽管pronator teres和pronator quadratus可以分别做出完整的残留旋前,但旋后肌对于残留旋后至关重要。根据屈曲程度,肱二头肌的贡献范围为4%至88%。结论与手腕关节的残余旋转相比,截肢部位与肘部的紧密靠近显着降低了残余旋转。前臂残端在18 cm处的前代异化保留率为80%。尽管pronator teres和pronator quadratus可以分别做出完整的残留旋前,但旋后肌对于残留旋后至关重要。
更新日期:2020-01-21
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