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