AIM: To observe the reliability and short-term and mid-term efficacy of a new designed multi-functional lacrimal sac nasal drainage stent on the treatment of nasolacrimal duct obstruction after endonasal endoscopic dacryocystorhinostomy(EES-DCR), and to evaluate its clinical application value.

METHODS: A retrospective case series study was carried out. Seventy-six patients(79 eyes)with nasolacrimal duct obstruction underwent EES-DCR and a new type of multi-functional lacrimal sac nasal drainage stent was implanted. The nasal lacrimal drainage stent was pulled out 2～3mo later after surgery and the patients received 3～6mo follow-up afterwards.

RESULTS: In 79 eyes, stents were successfully implanted in 77 eyes(97.5%). All stents of 77 eyes could be pulled out successfully 2～3mo after the operation. Sixty eyes were cured with unobstructed lacrimal irrigation and symptom of epiphora disappeared; 15 eyes were improved of epiphora and mild reflux during lacrimal irrigation were found, overall effective rate was 97.4%, 2 eyes failed in stent implantation. In 6mo follow-up, nocomplications such as stent displacement or slip was occurred, the epithelization of anastomotic stoma was good.

CONCLUSION: Surgical technique of using the multi-function nasolacrimal stent is simple and fast, and implantation of the new designed stents has a rapid recovery with fewer complications. The usage of the new stents not only improves the success rate but also broadens surgical indications of EES-DCR, it is a safe and effective method for the treatment of nasolacrimal duct obstruction.