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【单选题】
病人,男性,50岁。因食管癌进行了根治手术。检查胸腔引流管是否通畅最简单的方法是A.
检查病人的呼吸音是否正常
B.
检查引流管是否扭曲
C.
观察水封瓶中长水柱的波动
D.
看引流管内有无液体
E.
观察水封瓶内有无血液
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