筛骨迷路由多个小气房组成，变异较大，且位于各鼻窦的中心，与眼眶、颅前窝仅隔一薄骨板，紧密相邻，它体积不大而位置较深，故施行筛窦手术。
目的探讨筛动脉在筛窦手术中的意义。
Objective To explore the significance of ethmoidal artery in operation of ethmoidal sinus.
目的探讨眶下隐窝在筛窦手术中的意义。
Objective To explore the clinical significance of infraorbital recess in operation of ethmoidal sinus.
结论眶下隐窝变异较大，深浅不一，筛窦手术中应注意正确处理该隐窝。
Conclusion the variation of infraorbital recess was found frequently, the recess must be paid attention to in operation of ethmoidal sinus.
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