Objective: To explore the feasibility of TEA combined with GA with intubation in the ligation operation of children PDA.

目的：探讨胸段硬外阻滞（TEA）复合全麻（GA ）在小儿动脉导管未闭（PDA）结扎术中的可行性。

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Conclusions Base on the understanding of the severity of the disease, the safety and efficacy of LA depend on the skill of dissection, incision and ligation and the standardization of the operation.

结论在正确认识疾病严重程度的基础上，熟练的分离、切割、结扎等技术及操作程序的规范化是保证LA手术安全性和疗效的关键。

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Results: Pelvic inflammatory diseases, abortion, IUD, pelvic cavity operation, tubal ligation and pathological changes of reproductive system have evident effect on ectopic pregnancy.

结果：盆腔炎、流产史、放置宫内节育器、盆腔手术史、输卵管结扎术、生殖系统病理改变对异位妊娠的发生有明显影响作用。

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