慢性泪囊炎的治疗，常规手术为泪囊鼻腔吻合术。采用凿骨开窗，泪囊粘膜与鼻粘膜做“I”形切口，分别吻合泪囊粘膜与易粘膜的上下唇。在开骨窗的过程中，由于病人的年龄及性别不同，因此骨质疏密不同，力量不易掌握，用力过大，可使鼻骨塌陷，重者损伤鼻粘膜；用力过小，骨窗打 Chronic dacryocystitis treatment, conventional surgery for dacryocystorhinostomy. Using chisel open the window, dacryocyst mucosa and nasal mucosa to do “I” shaped incision, respectively, consistent with the upper and lower lip of the lacrimal sac and mucosa. In the process of open bone window, due to the patient’s age and gender, so different osteoporosis, strength is not easy to grasp, too much force, can collapse nasal bone, severe damage to the nasal mucosa; force too small, bone window hit