目的评估左听诊三角切口（ATT）与后外侧切口（PLT）下动脉导管未闭（PDA）缝扎术的疗效。

Objective To compare the curative effect of PDA surgical ligation between left Ausculatry triangle thoracotomy(ATT) and Posterolateral incision(PLT).

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方法采用肘前小切口法，于肱二头肌腱外侧达骨折断端，复位后交叉克氏针固定。

Method Approaching the fractured ends along the incision and outside tendon of muscles of biceps brachii, the fracture was fixed with intersect Kirschner pins after replacement.

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