对乳突气房发育情况与乙状窦关系的描述，不正确的是（）。 -题库考试答案搜索网

对乳突气房发育情况与乙状窦关系的描述，不正确的是（）。

单选题

2021-09-18 01:27

A、乳突气房发育好者，乙状窦位置偏后，与外耳道后壁之间的距离较大
B、乳突气房发育较差者，乙状窦骨板坚实，位置前移
C、乳突气房发育好者，乙状窦骨板较薄
D、乳突气房发育较差者，乙状窦与外耳道后壁的距离较小
E、乳突气房发育好者，乳突手术时易损伤乙状窦而造成出血，妨碍手术进行或可发生气栓，导致生命危险

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正确答案

试题解析

乳突内侧面颅后窝的前下方，有一弯曲的深沟称为乙状沟，乙状窦位于其中。乙状沟的深浅、宽窄及其骨壁的厚薄因乳突气房发育程度不同而各异。乳突气房发育好者，乙状窦骨板较薄且位置偏后，其与外耳道后壁之间的距离较大；乳突气房发育较差者，则乙状窦骨板坚实，位置前移，与外耳道后壁的距离较小，或接近。后者在乳突手术时易损伤乙状窦造成出血，妨碍手术进行或可发生气栓，导致生命危险。

标签：耳的应用解剖学及生理学耳鼻咽喉科主治医师耳科学广东住院医师耳鼻咽喉科学北京住院医师耳鼻咽喉科Ⅰ阶段

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