The device is used to debride polyps intranasally until normal structures can be identified . uncinectomy and maxillary meatotomy are then performed in the usual fashion , using conventional instruments . the ethmoid is entered with the tip of the blade and dissection performed posteriorly , remaining low in the ethmoid until the basal lamella is penetrated and the posterior ethmoid is entered 通常用旋切刀来清除鼻内息肉直达正常的组织，然后用传统器械进行钩突切除和上颌窦窦口扩大，再用刀尖进入筛窦，向后低位切除，至穿透中鼻甲基板而进入后组筛窦。
