Review of the risks of developing postoperative complications that might arise due to the treatment of various forms of glaucoma in dogs using transscleral cyclophotocoagulation

¹ Moscow State Academy of Veterinary Medicine and Biotechnology – MVA named after K. I. Skryabin, Moscow, Russia
² Veterinary Center of Emergency Veterinary Ophthalmology and Microsurgery, Moscow, Russia

^* Corresponding author: annatrukhan@mail.ru

Abstract

Transscleral cyclophotocoagulation is a promising method for treating various forms of glaucoma in dogs due to the possible adaptation of the total laser exposure protocol to each clinical case individually to achieve a hypotensive effect with a minimal probability of developing severe complications, so the issue of developing an optimal protocol is relevant. The research for the selection of such a protocol was carried out at the Department of Veterinary Surgery of the Federal State Budgetary Educational Institution of Higher Education MSAVM&B - MVA named after K. I. Scriabin and at the VC CEVO&M. To perform transscleral cyclophotocoagulation, a laser video endoscopic ophthalmological system Endo Optiks E2 was used, which contains a compact diode laser with a wavelength of 810 nm. In the process of selecting the protocol, based on the effectiveness of the exposure, the animals were divided into three groups: with insufficient (n=6), optimal (n=21) and excessive (n=3) total exposure. Changes in condition, including the development of complications, were assessed on the 1st, 7th and 30th days after surgery. In this study, a persistent hypotensive effect was achieved in dogs with primary open-angle glaucoma (POAG) in 90% of cases, in dogs with primary angle-closure glaucoma (PACG) in 66.7% of cases, in dogs with secondary angle-closure glaucoma (SCAG) in 58. 82% of cases. The study demonstrates the effectiveness of the proposed laser power protocol for the treatment of various forms of glaucoma in dogs. The best results were achieved in dogs in the group using the optimal protocol (n=21). The complications they developed were not severe and were amenable to therapeutic correction.