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【单选题】
吸痰操作中，下列哪项错误( )。
A.
调节负压至40.0～53.3kPa
B.
患者头部转向操作者
C.
先插管后再启动吸引器
D.
吸痰管从深部向上提出，左右旋转吸痰
E.
痰液黏稠，采用扣拍胸背、超声雾化吸入，便于吸出
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