title: Comparison of clinical outcomes between 23-gauge and 20-gauge vitrectomy in patients with proliferative diabetic retinopathy.
abstract: OBJECTIVE
  The purpose of this study was to compare the clinical outcomes and complications between 23-gauge transconjunctival sutureless vitrectomy and 20-gauge vitrectomy in patients with proliferative diabetic retinopathy.
  
  
  METHODS
  This is a retrospective comparative study comprising 101 eyes from 90 consecutive patients who had diabetic vitrectomy due to nonclearing vitreous hemorrhage. Thirty-five eyes underwent 23-gauge transconjunctival sutureless vitrectomy, and 66 eyes underwent 20-gauge vitrectomy. Main outcome measures were best-corrected visual acuity, intraocular pressure, and incidence of intraoperative and postoperative complications with at least 6 months of follow-up.
  
  
  RESULTS
  Best-corrected visual acuity of both groups at postoperative months 1, 3, and 6 significantly improved from the preoperative best-corrected visual acuity (P < 0.0001, respectively). There was no difference for best-corrected visual acuity between the 2 groups at each follow-up period (P > 0.05, respectively). Intraocular pressure of the 23-gauge group at postoperative Day 1 and Week 1 was less than the preoperative intraocular pressure (P < 0.0001 and 0.017). Operating time of the 23-gauge group was shorter than the 20-gauge group (P < 0.0001). There was no difference in the incidence of intraoperative and postoperative complications except transient postoperative hypotony, which occurred in 8 eyes (22.9%) from the 23-gauge group (P < 0.0001).
  
  
  CONCLUSIONS
  Twenty three-gauge transconjunctival sutureless vitrectomy appears to be as effective for proliferative diabetic retinopathy as 20-gauge vitrectomy.
authors.affiliation: Department of Ophthalmology, School of Medicine, Kyungpook National University, Daegu, Korea.
authors.forename: Dong Ho
authors.initials: DH
authors.lastname: Park
authors.forename: Jae Pil
authors.initials: JP
authors.lastname: Shin
authors.forename: Si Yeol
authors.initials: SY
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D003930:Diabetic Retinopathy / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007429:Intraocular Pressure / Q000502:physiology; D007431:Intraoperative Complications; D008297:Male; D008866:Microsurgery / Q000379:methods*; D008875:Middle Aged; D011183:Postoperative Complications; D012189:Retrospective Studies; D012599:Sclerostomy / Q000379:methods; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology; D014821:Vitrectomy / Q000379:methods*