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Wound leakage rates of ex vivo uniplanar versus biplanar phacoemulsification clear corneal incisions in dogs
Author(s) -
Snyder Kevin,
Terhaar Hannah,
Bentley Ellison,
Miller Paul E.
Publication year - 2020
Publication title -
veterinary ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.594
H-Index - 50
eISSN - 1463-5224
pISSN - 1463-5216
DOI - 10.1111/vop.12729
Subject(s) - phacoemulsification , ex vivo , leakage (economics) , medicine , in vivo , ophthalmology , cornea , surgery , biology , visual acuity , macroeconomics , economics , microbiology and biotechnology
Objective The purpose of this study was to compare the leakage rates of perilimbal uniplanar and biplanar clear corneal incisions in dogs when subjected to increased intraocular pressure (IOP) both from within the eye and via external pressure. Procedure Uniplanar clear corneal incisions were created in eight freshly enucleated canine eyes using a 3.2 mm straight slit knife while 8 fellow eyes received a biplanar clear corneal incision consisting of an approximately 300 μm deep groove followed by a 3.2 mm straight slit knife entry into the anterior chamber. Both wounds were reapposed using three simple interrupted 8‐0 polyglactin 910 sutures. Eyes were cannulated with two 25 g needles: One connected to a pressure transducer, and the other connected to a reservoir of isotonic saline. The IOP at which the wound leaked was recorded when the intraocular pressure was increased internally by raising the height of the fluid bag, and again when the cornea was externally compressed. Kaplan‐Meier survival curves compared incision types for each method of increasing IOP and were evaluated using Mantel‐Cox log‐rank analysis. Results Both wound types resisted leakage at IOP in the physiologically achievable range and no significant differences were observed between clear corneal incisions when pressure was applied externally ( P = .353) or was increased from within the globe ( P = .615). Conclusion Ex vivo uniplanar and biplanar clear corneal incisions in dogs are equally strong, with no significant differences in leakage rates when IOP is increased internally or externally.