Objective:To investigate the clinical effect of endonasal endoscopic dacryocystorhinostomy(EES-DCR) combined with lacrimal duct drainage tube implantation in treating the patients with lacrimal duct obstruction. Methods: 32 patients (37 eyes) with lacrimal duct obstruction were included into this study, including 1 patient (2 eyes) of functional nasal lacrimal duct obstruction,2 patients (2 eyes) of recurrence after EES-DCR,17 patients (19 eyes) of nasal lacrimal duct obstruction,6 patients (8 eyes) of small lacrimal sac, and 6 patients (6 eyes) of lacrimal duct obstruction. Intraoperative EES-DCR was performed, and lacrimal drainage tubes were implanted from the upper and lower lacrimal points. Septoplasty was performed in 3 patients with nasal septum deviation, and endoscopic sinus surgery was performed in 1 patient with chronic sinusitis.After operation, nasal hormone spraying was performed. During follow-up, the operation effect was evaluated according to the degree of symptom improvement, the patency of lacrimal passage irrigation and the opening state of dacryocystorhinostomy under nasal endoscope. Results:After 3-30 months of follow-up, 29 cases(34 eyes) were cured, 2 cases(2 eyes) were improved, and 1 case(1 eye) was ineffective. The total effective rate was 97.3%(36/37). No intraorbital, intracranial or nasal complications occurred in all patients. Conclusion:EES-DCR combined with lacrimal duct drainage tube implantation is safe and effective in treating lacrimal duct obstruction. Implantation of lacrimal duct drainage tube can effectively avoid stoma blockage, prevent the adhesion of lacrimal duct, and significantly improve the success rate of surgery.

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