AIM: To observe the therapeutic effects of improved external dacryocystorhinostomy.

METHODS:Retrospective analysis on 94 patients with monocular chronic dacryocystitis in our hospital from October 2010 to December 2013 were taken the improved external dacryocystorhinostomy. The improved surgery which was based on the traditional surgery including: 1. Nasal packing after anesthesia to relieve the pain and bleeding; 2. Not cut the medial palpebral ligament; 3. Suture the upper membrane of the nasal mucosa only; 4. Pipe placement; 5. Skin layered hairdressing suture. The patients were follow-up 3mo-2a after operation.

RESULTS: Ninety-three cases of patients cured with completely asymptomatic, no epiphora or mucopurulent secretion flow out from the lacrimal punctum, unobstructed lacrimal irrigation, the efficiency is 99%, 1 case of patient was epiphora, obstructed lacrimal irrigation, 1% was invalid.

CONCLUSION: The improved external dacryocystorhinostomy is an effective surgical method which is easy to operate with high cure rate and its long term effect is precise.