To complete the surgery, the hole in the dura must be completely sealed to prevent leaking of cerebrospinal fluid. 為了完成整個(gè)手術(shù)，硬脊膜上的小孔必須完全密封防止腦脊液漏出。
Cerebral spinal fluid fistulas of the anterior skull base lend themselves to an endoscopic approach.Dissection begins with a meticulous anterior and posterior ethmoidectomy. 前顱底的腦脊液漏可以在鼻內窺鏡下進(jìn)行處理，先小心翼翼的進(jìn)行前后篩竇組切除術(shù)，以暴露篩頂全長(cháng)。
