title: Clinical results of endoscopic dacryocystorhinostomy using a microdebrider.
abstract: OBJECTIVE
  The success rate of endoscopic dacryocystorhinostomy has been increasing with the development of better instruments and techniques. We conducted this study to evaluate the clinical results of endoscopic dacryocystorhinostomy using a Microdebrider, which has also been used for functional endoscopic sinus surgery.
  
  
  METHODS
  We selected 76 patients (with a total of 84 affected eyes) who had been diagnosed with a nasolacrimal duct obstruction. These patients underwent an endoscopic dacryocystorhinostomy using a Microdebrider, which removed both nasal mucosa and lacrimal sac mucosa and also trimmed the margins of the ostotomy site. We assessed patients' outcomes on an anatomical basis using a dye test and endoscopy, which were used to define the anatomical success. We also arbitrarily defined functional success as whether the subjective epiphora was absent. At a four to 18 month follow-up, we monitored the clinical course to examine any recurrent episodes.
  
  
  RESULTS
  The symptoms were alleviated in 72 eyes, with a primary success rate of 85.7%. On nasal endoscopy, a functional failure was seen in four eyes. In these four eyes, the orifice was narrowed by the presence of either granulation tissue or conjunctivochalasis. By contrast, surgical outcomes were the anatomical failure in eight eyes. In these eight eyes, the orifice was obstructed by the presence of granulation tissue as well as the adhesion of nasal mucosa.
  
  
  CONCLUSIONS
  Endoscopic dacryocystorhinostomy using a Microdebrider enabled us to make the large fistula while minimizing the damage of adjacent tissue. It might be the recommended surgery that reduces the complications and enhances the success rate.
authors.affiliation: Department of Ophthalmology, Dongkang General Hospital, Ulsan, Korea. lavie2k@korea.com
authors.forename: Sung Wook
authors.initials: SW
authors.lastname: Yoon
authors.forename: Young Sun
authors.initials: YS
authors.lastname: Yoon
authors.forename: Su Hyung
authors.initials: SH
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003608:Dacryocystorhinostomy / Q000379:methods*; D003646:Debridement / Q000295:instrumentation*; D004724:Endoscopy; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D008904:Miniaturization; D012189:Retrospective Studies; D016896:Treatment Outcome