title: Early postoperative hypotony after 25-gauge sutureless vitrectomy with straight incisions.
abstract: OBJECTIVE
  To evaluate the rate, duration, and associated complications of postoperative hypotony after 25-gauge sutureless vitrectomy.
  
  
  METHODS
  In a retrospective, interventional, institutional case series, 25-gauge sutureless vitrectomy with straight incisions was performed on 111 eyes. Postoperative intraocular pressure (IOP) was measured routinely at 2 hours, 1 day, 1 week, and 1 month. Postoperative IOP, hypotony (IOP, <8 mmHg) rates, and complications associated with low IOP were assessed to determine outcome.
  
  
  RESULTS
  Mean follow-up +/- SD was 5.45 +/- 3.44 months. Mean IOP decreased significantly by 2 hours and on postoperative day 1 (P < 0.001) and increased to preoperative levels at week 1 (P = 0.48). Postoperative hypotony rates were 26.12%, 17.11%, and 8.10% at 2 hours, 1 day, and 1 week, respectively. The ratio of postoperative vitreous hemorrhage in eyes with and without hypotony on day 1 was 2:6 (P = 0.412). Two eyes with macular holes (MHs) filled inadequately with gas endotamponade that remained hypotonic for the first postoperative week underwent reoperation due to unsealed MHs.
  
  
  CONCLUSIONS
  Twenty-five-gauge sutureless vitrectomy with straight incisions resulted in a hypotony rate of 26.12% at 2 hours that decreased to 17.11% on day 1 and to 8.10% at week 1 but did not increase the incidence of postoperative complications.
authors.affiliation: Beyoglu Eye Research and Training Hospital, Istanbul, Turkey. nur.nuracar@gmail.com
authors.forename: Nur
authors.initials: N
authors.lastname: Acar
authors.forename: Ziya
authors.initials: Z
authors.lastname: Kapran
authors.forename: Yaprak Banu
authors.initials: YB
authors.lastname: Unver
authors.forename: Tugrul
authors.initials: T
authors.lastname: Altan
authors.forename: Sezin
authors.initials: S
authors.lastname: Ozdogan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005466:Fluorocarbons / Q000008:administration & dosage; D005500:Follow-Up Studies; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008866:Microsurgery; D008875:Middle Aged; D015814:Ocular Hypotension / Q000209:etiology*; D011183:Postoperative Complications; D012164:Retinal Diseases / Q000601:surgery; D012189:Retrospective Studies; D013459:Sulfur Hexafluoride / Q000008:administration & dosage; D013536:Suture Techniques; D014821:Vitrectomy / Q000379:methods*; D014823:Vitreous Hemorrhage / Q000601:surgery
chemical_list: D005466:Fluorocarbons; C042852:perflutren; D013459:Sulfur Hexafluoride