泪囊CT造影研究

目的:探讨鼻内窥镜下泪囊鼻内造口术前泪囊CT造影的意义。方法:10例(20侧)健康志愿者、12例(24侧)慢性泪囊炎患者术前均进行了泪囊CT轴位及冠状位造影检查。结果:根据筛窦气化程度不同,将泪囊与筛窦的解剖关系分三种类型:Ⅰ型为前组筛窦前界位于泪后嵴之后,Ⅱ型为前组筛窦气化达泪颌缝,Ⅲ型为前组筛窦前端超过泪颌缝达泪前嵴,在轴位层面观察结果为Ⅰ型12侧(27.3％)、Ⅱ型18侧(40.9％)、Ⅲ型14侧(31.8％);12例患者冠状层面观察泪道阻塞部位均为泪囊与鼻泪管的移行处,11例泪囊形态正常或扩大,1例双侧泪囊瘢痕挛缩。结论:术前泪囊CT造影检查对鼻内窥镜下泪囊鼻内造口术中选择适当造口位置具有重要指导意义。

Study of computed tomographic dacryocystography used in endoscopic intranasal dacryocystorhinostomy preoperatively

Objective;To study computed tomographic dacryocystography used in endoscopic intranasal dacryo-cystorhinostomy preoperatively. Method: Ten volunteers and twelve patients with dacryocystitis were undergone the coronary and axial computed tomographic dacryocystography. Result: According to the anatomic relationship between anterior ethmoid sinus and fossa of lacrimal sac, the cells of anterior ethmoid sinus were classified into three typies: the result was that typy I accounted for 12 sides(27. 3%) ,typyl 18 sides(40. 9%) ,typy for 14 sides (31. 8%) by analysing the data of axial dacryocystographies; the sites of obstruction were connection of the lacrimal sac with nasolacrimal duct,the form of lacrimal sac of 11 patients was normal or enlarged lacrimal sacs,bilateral cricatrized lacrimal sacs were found in one patient by analysing the data of coronary dacryocystographies. Conclusion: Computed tomographic dacryocystography preoperatively can provide significant clincial guidance for the endoscopic transnasal dacryocystorhinostomy in locating the site of bone-opening.