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Use of a 350‐mm 2 Baerveldt glaucoma drainage device to maintain vision and control intraocular pressure in dogs with glaucoma: a retrospective study (2013–2016)
Author(s) -
Graham Kathleen L.,
Donaldson David,
Billson Francis A.,
Billson F. Mark
Publication year - 2017
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.12443
Subject(s) - medicine , glaucoma , intraocular pressure , ophthalmology , glaucoma surgery , surgery , retrospective cohort study , glaucoma medication , trabeculectomy
Objective To evaluate the 350‐mm 2 Baerveldt glaucoma drainage device ( GDD ) in dogs with refractory glaucoma when modifications to address postoperative hypotony (extraluminal ligature; intraluminal stent) and the fibroproliferative response (intraoperative Mitomycin‐C; postoperative oral colchicine and prednisolone) are implemented as reported in human ophthalmology. Design Retrospective case series. Animals Twenty‐eight client‐owned dogs (32 eyes) including seven dogs (nine eyes) with primary glaucoma and 21 dogs (23 eyes) with secondary glaucoma. Methods The medical records of all dogs undergoing placement of a 350‐mm 2 Baerveldt GDD at a veterinary ophthalmology referral service between 2013 and 2016 were reviewed. Signalment, diagnosis, duration and previous treatment of glaucoma, previous intraocular surgery, IOP , visual, and surgical outcomes were recorded. Results IOP was maintained <20mmHg in 24 of 32 (75.0%) eyes. Fourteen eyes (43.8%) required no adjunctive treatments to maintain this IOP control. Fewer doses of glaucoma medication were required following surgery. Vision was retained in 18 of 27 (66.7%) eyes with vision at the time of surgery. No eyes that were blind at the time of surgery ( n = 5) had restoration of functional vision. Complications following surgery included hypotony (26/32; 81.3%), intraocular hypertension (24/32; 75.0%), and fibrin formation within the anterior chamber (20/32; 62.5%). The average follow‐up after placement of the GDD was 361.1 days (median 395.6 days). Conclusion Efforts to minimize postoperative hypotony and address the fibroproliferative response following placement of a 350‐mm 2 Baerveldt GDD showed an increased success rate to other reports of this device in dogs and offers an alternative surgical treatment for controlling intraocular pressure in dogs with glaucoma.