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【单选题】
患者张某,60岁,既往有肺心病史10年,昨日突然出现极度呼吸困难,口唇发紫,烦躁不安,今晨又出现昏迷、血压下降,心律失常。对张某保持气道通畅量好的方法是:A.
协助拍背
B.
雾化吸人
C.
建立人工气道
D.
控制感染
E.
导管吸痰
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D.
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