title: Effects of intracameral injection of viscoelastic solutions on intraocular pressure in dogs.
abstract: Intraocular pressure (IOP) was determined in right eyes of 20 healthy dogs after sodium hyaluronate (1%, n = 5), sodium chondroitin sulfate (4%) and sodium hyaluronate (3%, n = 5), hydroxypropyl methylcellulose (2%, n = 5), or balanced salt solution (control, n = 5) was injected into the anterior chamber. Applanation tonometry was used to measure IOP in both eyes of each dog for up to 168 hours. The 3 viscoelastic solutions resulted in an increased mean IOP by postinjection hours (PIH) 2; from PIH 12 until PIH 72, the IOP was significantly (P less than 0.001) lower than baseline. The control group did not have an increase in IOP at PIH 2; mean IOP decreased below baseline measurements within 2 hours and remained lower until PIH 72. Mean differences in IOP were not found among treated eyes (P = 0.50), and a significant interaction of any treated eyes in a group was not detected (P = 0.21). By PIH 168, the IOP approached baseline values in all groups.
authors.affiliation: Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana 61801.
authors.forename: P A
authors.initials: PA
authors.lastname: Gerding
authors.forename: S A
authors.initials: SA
authors.lastname: McLaughlin
authors.forename: A H
authors.initials: AH
authors.lastname: Brightman
authors.forename: D
authors.initials: D
authors.lastname: Essex-Sorlie
authors.forename: L C
authors.initials: LC
authors.lastname: Helper
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D000867:Anterior Chamber; D002807:Chondroitin / Q000031:analogs & derivatives*; D002809:Chondroitin Sulfates / Q000008:administration & dosage / Q000494:pharmacology*; D004285:Dogs / Q000502:physiology*; D005260:Female; D006820:Hyaluronic Acid / Q000008:administration & dosage / Q000494:pharmacology*; D065347:Hypromellose Derivatives; D007429:Intraocular Pressure / Q000187:drug effects*; D008297:Male; D008747:Methylcellulose / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D013997:Time Factors; D014783:Viscosity
chemical_list: D065347:Hypromellose Derivatives; D006820:Hyaluronic Acid; D008747:Methylcellulose; D002807:Chondroitin; D002809:Chondroitin Sulfates