title: 23-Gauge versus 20-gauge system for pars plana vitrectomy: a prospective randomised clinical trial.
abstract: OBJECTIVE
  To compare the sutureless 23-gauge system with a standard 20-gauge system in pars plana vitrectomy.
  
  
  METHODS
  60 patients in two randomised groups were included in this prospective clinical trial. Pars plana vitrectomy with either 23- or 20-gauge instruments was performed. The main outcome measures were postoperative conjunctival injection and pain. Secondary outcome parameters were time of surgery, intraocular pressure, visual acuity and complications.
  
  
  RESULTS
  Conjunctival injection (p = 0.0003) and postoperative pain (p = 0.01) were significantly reduced following 23-gauge vitrectomy compared with the 20-gauge procedure. Opening (p = 0.006) and closure times (p<0.00001) were significantly shorter, and vitrectomy time (p = 0.001) significantly longer in the 23-gauge system compared with 20-gauge vitrectomy. However, retinal manipulation and overall surgery times did not differ significantly between both groups. The same applies for eye pressure, distance and reading acuity. Regarding complications, two choroidal haemorrhages and one flat serous choroidal detachment occurred in the 23-gauge group.
  
  
  CONCLUSIONS
  The 23-gauge system for pars plana vitrectomy offers significantly higher patient comfort during the early postoperative period. Time of surgery is almost equal--a shorter time for wound closure is neutralised by a longer vitrectomy time in the 23-gauge group.
authors.affiliation: Department of Ophthalmology, Rudolph Foundation Clinic, Vienna, Austria.
authors.forename: B
authors.initials: B
authors.lastname: Wimpissinger
authors.forename: L
authors.initials: L
authors.lastname: Kellner
authors.forename: W
authors.initials: W
authors.lastname: Brannath
authors.forename: K
authors.initials: K
authors.lastname: Krepler
authors.forename: U
authors.initials: U
authors.lastname: Stolba
authors.forename: C
authors.initials: C
authors.lastname: Mihalics
authors.forename: S
authors.initials: S
authors.lastname: Binder
mesh_terms: D000293:Adolescent; D000328:Adult; D019773:Epiretinal Membrane / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D008297:Male; D010149:Postoperative Pain / Q000209:etiology; D015868:Pars Planitis / Q000503:physiopathology / Q000601:surgery*; D011446:Prospective Studies; D012167:Retinal Perforations / Q000150:complications / Q000601:surgery*; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology*; D014821:Vitrectomy / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods