title: Management of branch retinal vein occlusion with vitrectomy and arteriovenous adventitial sheathotomy, the possible role of surgical posterior vitreous detachment.
abstract: BACKGROUND
  To analyze the results of vitrectomy and adventitial sheathotomy in the management of branch retinal vein occlusion (BRVO). This is a nonrandomized interventional case series.
  
  
  METHODS
  Patients with BRVO with progressive decrease in visual acuity underwent surgery and were prospectively evaluated in two centers. Surgical procedure included a 3-port pars plana vitrectomy, removal of the internal limiting membrane and arteriovenous crossing sheathotomy. Clinical evaluation consisted of best-corrected visual acuity, fluorescein angiography and optical coherence tomography.
  
  
  RESULTS
  Thirteen eyes were analyzed consecutively. An improvement in visual acuity of two ETDRS lines or more was observed in nine eyes (69%). The mean gain was 1.9 ETDRS lines. The absence of previous posterior vitreous detachment (PVD), poor initial visual acuity and the presence of retinal ischemia were correlated to the improvement in vision (P=0.014, P=0.002 and P=0.052, respectively). Eyes with initial PVD had a mean loss postoperatively of -5.7 lines, but eyes without PVD experienced a gain of 4.2 lines (P<0.001). Macular edema decreased significantly (preoperative thickness: 714 micro m, postoperative thickness: 353 micro m, P=0.04), whereas the aspect of the vein at the crossing and the non-perfused area remained unchanged.
  
  
  CONCLUSIONS
  Vitrectomy with sheathotomy seems to be of benefit in the management of BRVO, particularly in eyes with no previous PVD, and the main postoperative feature was the decrease in macular edema. The surgical detachment of posterior hyaloid could be as important (or more) as the sheathotomy itself. Further studies are needed to define the most efficient surgical management of BRVO.
authors.affiliation: Clinique Ophtalmologique Universitaire de Créteil, Hôpital Intercommunal et Hôpital Henri Mondor Assistance Publique des Hôpitaux de Paris, Université Paris XII, 40 avenue de Verdun, 94 000 Creteil, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Charbonnel
authors.forename: Agnès
authors.initials: A
authors.lastname: Glacet-Bernard
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Korobelnik
authors.forename: Emilienne
authors.initials: E
authors.lastname: Nyouma-Moune
authors.forename: Constantin J
authors.initials: CJ
authors.lastname: Pournaras
authors.forename: Joseph
authors.initials: J
authors.lastname: Colin
authors.forename: Gabriel
authors.initials: G
authors.lastname: Coscas
authors.forename: Gisèle
authors.initials: G
authors.lastname: Soubrane
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003238:Connective Tissue / Q000473:pathology / Q000601:surgery*; D005260:Female; D005451:Fluorescein Angiography; D006801:Humans; D008269:Macular Edema / Q000517:prevention & control; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012161:Retinal Artery; D012169:Retinal Vein; D012170:Retinal Vein Occlusion / Q000175:diagnosis / Q000601:surgery*; D041623:Tomography, Optical Coherence; D014792:Visual Acuity; D014821:Vitrectomy / Q000379:methods*; D020255:Vitreous Detachment / Q000175:diagnosis / Q000601:surgery*