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【单选题】
,28岁。胸部外伤致右侧第5肋骨骨折并发气胸,呼吸极度困难,发绀,出冷汗。检查:血压10.6/8kPa(80/60mmHg),气管向左侧移位,右胸廓饱满,叩诊呈,呼吸音消失,颈胸部有广泛皮下气 肿等。医生采用闭式胸膜腔引流治疗。造成病人极度呼吸困难、发绀的主要原因是A.
侧肺受压迫
B.
纵隔向侧移位
C.
静脉血液回流受阻
D.
伤侧胸腔压力不断升高
E.
广泛皮下气肿
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