title: Short-term intraocular pressure changes after intravitreal injection of bevacizumab.
abstract: BACKGROUND
  This study examines the changes in short-term intraocular pressure (IOP) in patients receiving intravitreally administered bevacizumab. A prospective series of consecutive patients undergoing injection of intravitreal bevacizumab was investigated.
  
  
  METHODS
  All patients received bevacizumab (0.05 cc) injected intravitreally in a standard fashion. IOP was measured at baseline, 2, 5, and 30 minutes after injection by 1 of 2 observers using Goldman applanation tonometry. An intraobserver study was done to assess agreement in IOP measurements.
  
  
  RESULTS
  We accrued 104 patients with a mean age of 76 years: 58% were female, and 42% were male. Most patients (85%) were being treated for neovascular age-related macular degeneration. The mean IOP values at baseline, 2, 5, and 30 minutes after injection were 14.0 (95% confidence interval [CI] 13.4-14.7) mm Hg, 36.1 (95% CI 33.5-38.6) mm Hg, 25.7 (95% CI 23.8-27.5) mm Hg, and 15.5 (95% CI 12.4-16.51) mm Hg, respectively. Three patients (2.9%) had an IOP of 25 mm Hg or higher at 30 minutes. IOP normalized within 2 hours without medical therapy in 2 of these patients, and 1 patient required a 1-week course of glaucoma medication. Regression analysis showed a trend towards phakic patients having higher IOP at 30 minutes (odds ratio = 3.2; p = 0.089).
  
  
  CONCLUSIONS
  Intravitreal injection of bevacizumab is safe with respect to short-term IOP changes, as almost all patients' IOP returned to a safe range (<25 mm Hg) within 30 minutes. Elevated IOP at 30 minutes after injection does occur, rarely, thus clinicians should consider checking IOP after injection as a precaution. Transient extreme IOP elevations occur in a significant percentage of patients, but the consequences of these events are unknown.
authors.affiliation: Department of Ophthalmology, Queen's University, Hotel Dieu Hospital, Kingston, ON K7L 5S9. 8hh1@qlink.queensu.ca
authors.forename: Hussein
authors.initials: H
authors.lastname: Hollands
authors.forename: Jonathan
authors.initials: J
authors.lastname: Wong
authors.forename: Robin
authors.initials: R
authors.lastname: Bruen
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Campbell
authors.forename: Sanjay
authors.initials: S
authors.lastname: Sharma
authors.forename: Jeffery
authors.initials: J
authors.lastname: Gale
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D020533:Angiogenesis Inhibitors / Q000008:administration & dosage*; D000911:Antibodies, Monoclonal / Q000008:administration & dosage*; D061067:Antibodies, Monoclonal, Humanized; D000068258:Bevacizumab; D020256:Choroidal Neovascularization / Q000188:drug therapy / Q000209:etiology; D003930:Diabetic Retinopathy / Q000150:complications / Q000188:drug therapy; D005260:Female; D006801:Humans; D007267:Injections; D007429:Intraocular Pressure / Q000187:drug effects*; D008268:Macular Degeneration / Q000150:complications / Q000188:drug therapy; D008269:Macular Edema / Q000150:complications / Q000188:drug therapy; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013997:Time Factors; D014065:Tonometry, Ocular; D042461:Vascular Endothelial Growth Factor A / Q000037:antagonists & inhibitors; D014822:Vitreous Body
chemical_list: D020533:Angiogenesis Inhibitors; D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; C467484:VEGFA protein, human; D042461:Vascular Endothelial Growth Factor A; D000068258:Bevacizumab