目的    研究肘后正中心的手术入路，即尺骨鹰嘴矢状面薄片截骨入路的可显露范围以及缝线固定后的效果，探讨其用于肱骨髁间骨折手术的可行性。 方法    在18具新鲜成人尸体上肢标本上, 行肘后正中尺骨鹰嘴矢状面薄片截骨,观察测量此入路对肱骨远端的可显露范围，用PDS-Ⅱ缝线原位间断缝合所截两侧肌骨瓣，以MTS 试验机模拟持续被动运动进行屈伸疲劳试验,检测固定效果。 结果    ①所有标本均能完全显露向内至肱骨内髁及髁上的内侧面，向外至肱骨外髁及髁上外侧面，屈曲肘关节至　100°以上则可将髁间窝、滑车及肱骨小头的后、下关节面完全显露。②疲劳试验前后横向距离差值、纵向距离差值分别为：（0.025±0.009）mm、（0.030±0.009） mm，均不超过0.05 mm（P<0.001）。  结论    肘后正中尺骨鹰嘴矢状面薄片截骨的新入路显露肱骨髁间满意，缝线固定两侧肌骨瓣后完全能满足术后早期功能锻炼要求，此新的手术入路是治疗肱骨髁间骨折的理想入路。

        Objective    To investigate the exposure scope and fixation effects after sagittal osteotomy of olecranon at the median cubital position, and explore its feasibility for treating intercondylar fracture of humerus.  Methods    Sagittal osteotomy of olecranon was performed on 18 fresh adult upper limb specimens. The exposure scope of distal humerus after the osteotomy of olecranon was measured, and then PDS-Ⅱ suture was used to fix the muscle-bone flaps in situ. The fixture effects were detected using the fatigue test of flexion-extension motion which executed by the MTS to simulate the effects of CPM.  Results    ①The humeral medial and lateral condyles, medial and lateral surface of supracondylar can be completely exposed in all specimens, while intercondylar fossa, the inferior and posterior articular surface of humeral trochlea and capitellum can be completely presented when elbow joint was flexed to 1000. ②Transverse distance and longitudinal distance pre- and post-fatigue test were (0.025±0.009)mm and (0.030±0.009)mm respectively, lower than 0.05mm（P<0.001）. Conclusions   Exposure scope of humeral intercondylar after the sagittal osteotomy of olecranon is satisfied, meanwhile, the suture fixation of muscle-bone flaps is a comparatively stable fixture method, which is favorable for post-operational functional exercise.