title: Arteriovenous sheathotomy for persistent macular edema in branch retinal vein occlusion.
abstract: OBJECTIVE
  To evaluate the efficacy of arteriovenous (AV) sheathotomy with internal limiting membrane peeling for persistent or recurrent macular edema after intravitreal triamcinolone injection and/or laser photocoagulation in branch retinal vein occlusion.
  
  
  METHODS
  Twenty-two eyes with branch retinal vein occlusion (BRVO) with recurrent macular edema underwent vitrectomy with AV sheathotomy and internal limiting membrane peeling. All eyes had previous intravitreal triamcinolone injection and/or laser photocoagulation for macular edema. The best corrected visual acuity (BCVA), fluorescein angiography and optical coherence tomography (OCT) before and after surgery were compared.
  
  
  RESULTS
  The mean preoperative BCVA (log MAR) were 0.79 +/- 0.29 and postoperative BCVA (log MAR) at 3 months was 0.57 +/- 0.33. And improvement of visual acuity > or = 2 lines was observed in 10 eyes (45%). The mean preoperative fovea thickness measured by OCT was 595.22 +/- 76.83 microm (510-737 microm) and postoperative fovea thickness was 217.60 +/- 47.33 microm (164-285 microm).
  
  
  CONCLUSIONS
  Vitrectomy with AV sheathotomy can be one treatment option for the patients with recurrent macular edema in BRVO.
authors.affiliation: Hangil Eye Hospital, Incheon, Korea.
authors.forename: Joon Hong
authors.initials: JH
authors.lastname: Sohn
authors.forename: Su Jeong
authors.initials: SJ
authors.lastname: Song
mesh_terms: D005260:Female; D005451:Fluorescein Angiography; D005500:Follow-Up Studies; D005654:Fundus Oculi; D006801:Humans; D008266:Macula Lutea / Q000601:surgery*; D008269:Macular Edema / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D013508:Ophthalmologic Surgical Procedures / Q000379:methods*; D012170:Retinal Vein Occlusion / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D012189:Retrospective Studies; D041623:Tomography, Optical Coherence; D016896:Treatment Outcome