title: Clinical study of endoscopic endonasal conjunctivodacryocystorhinostomy with Jones tube placement.
abstract: OBJECTIVE
  To evaluate the efficacy of endoscopic endonasal primary conjunctivodacryocystorhinostomy (CDCR) and revision CDCR after primary CDCR.
  
  
  METHODS
  Twenty-four patients who had undergone endoscopic endonasal CDCR with a Jones tube and who were followed up for over 6 months at our hospital were reviewed retrospectively. Our analysis included success rate, operation times, and causes of failure.
  
  
  RESULTS
  The indications for revision CDCR were Jones tube prolapse and inadequate tube length. The initial success rate in the primary and revision groups were 78.6% (11/14) and 100% (10/10), respectively, and their mean operation times were 24 min (+/- 6.3) and 21 min (+/- 6.1), respectively. Main causes of failure included inaccurate tube length and abnormal tube position.
  
  
  CONCLUSIONS
  Endoscopic endonasal CDCR appears to be a reasonable revision and primary approach, because it allows Jones tube length to be measured accurately during surgery, and an 18- to 20-mm Jones tube length was used in most cases.
authors.affiliation: Kong Eye Medical Center, Gachon University Gil Medical Center, Incheon, Republic of Korea.
authors.forename: Min Soo
authors.initials: MS
authors.lastname: Park
authors.forename: Mi Jung
authors.initials: MJ
authors.lastname: Chi
authors.forename: Se Hyun
authors.initials: SH
authors.lastname: Baek
mesh_terms: D000328:Adult; D003228:Conjunctiva / Q000601:surgery*; D003608:Dacryocystorhinostomy / Q000379:methods*; D004724:Endoscopy; D005260:Female; D006801:Humans; D007440:Intubation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009301:Nasolacrimal Duct / Q000601:surgery*; D012086:Reoperation; D012189:Retrospective Studies