title: Pars plana vitrectomy for the repair of primary, inferior rhegmatogenous retinal detachment associated to inferior breaks. A comparison of a 25-gauge versus a 20-gauge system.
abstract: BACKGROUND
  To compare anatomical, functional outcomes and complications of high-speed 25-gauge (G) pars plana vitrectomy (PPV) versus 20-G PPV for the management of primary inferior rhegmatogenous retinal detachment (RRD) associated to inferior breaks/holes.
  
  
  METHODS
  Eighty-five eyes from 85 patients with a minimum follow-up of 3 months were retrospectively evaluated. Forty-one patients underwent 25-G and 44 patients underwent 20-G PPV. All patients underwent PPV with fluid-air exchange, sulfur hexafluoride (SF6) 20 % gas tamponade and laser or cryo retinopexy.
  
  
  RESULTS
  The mean follow-up interval was 6.51(± 2.32) and 6.63 (± 2.58) months in the 25-G and 20-G groups respectively. Single-operation success rate was 92.7 % for the 25-G group and 81.8 % for the 20-G group (P = 0.24). Post-operative hypotony was observed in no case. Redetachment occurred in 3 eyes operated on with 25-G and in 8 eyes operated on with 20-G system. All retinas were attached at final follow-up. Logarithm of the minimum angle of resolution visual acuity significantly improved from 0.69 ± 0.76 to 0.33 ± 0.37 in the 25-G and from 0.47 ± 0.59 to 0.21 ± 0.28 in the 20-G group (P = 0.0007 and P < 0.0001 respectively).
  
  
  CONCLUSIONS
  High-speed PPV and SF6 gas tamponade using either 25-G or 20-G PPV system, yields similar single operation anatomical success rates for the repair of uncomplicated, primary inferior RRDs associated to inferior breaks.
authors.affiliation: Department of Ophthalmology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
authors.forename: Roberto
authors.initials: R
authors.lastname: Dell'Omo
authors.forename: Francesco
authors.initials: F
authors.lastname: Barca
authors.forename: H Stevie
authors.initials: HS
authors.lastname: Tan
authors.forename: Heico M
authors.initials: HM
authors.lastname: Bijl
authors.forename: Sarit Y Lesnik
authors.initials: SY
authors.lastname: Oberstein
authors.forename: Marco
authors.initials: M
authors.lastname: Mura
mesh_terms: D003452:Cryosurgery; D058450:Endotamponade; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008866:Microsurgery / Q000379:methods*; D008875:Middle Aged; D019591:Pseudophakia / Q000150:complications; D012163:Retinal Detachment / Q000503:physiopathology / Q000601:surgery*; D012167:Retinal Perforations / Q000503:physiopathology / Q000601:surgery*; D012189:Retrospective Studies; D013459:Sulfur Hexafluoride / Q000008:administration & dosage; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology; D014821:Vitrectomy / Q000379:methods*
chemical_list: D013459:Sulfur Hexafluoride