问题 单项选择题 A1/A2型题

腹外疝发病原因中最重要的是()

A.腹壁强度降低

B.慢性便秘

C.慢性咳嗽

D.排尿困难

E.腹水

答案

参考答案:A

解析:造成疝的原因可以分为两方面,一方面是腹压升高:是主要诱因,如啼哭、重体力劳动、妊娠、便秘、排尿困难、腹腔肿瘤等;另一方面是腹壁抵抗力下降:可因先天性或后天性的腹壁薄弱,是发病的基础。腹壁有先天性或后天性薄弱或缺损是腹外疝的发病基础,腹腔内压力增高是重要的诱因。故答案应选A。

阅读理解

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单项选择题