Postoperative “fibrin web” formation after canine cataract surgery
A 10-y-old female spayed Miniature Schnauzer 2.5wk post-phacoemulsification. Fibrin from within the capsular bag and IOL is coalescing into a “web” in the anterior chamber

Postoperative “fibrin web” formation after canine cataract surgery

Purpose: To describe the occurrence and associated factors for “fibrin web” (FW)
formation following phacoemulsification in dogs.
Methods: A retrospective review of medical records of all dogs undergoing phacoemulsification (MU-Veterinary Health Center, 2014-2018) was conducted to associate FW formation with signalment, systemic co-morbidities, cataract stage, surgeon
(resident vs faculty), phacoemulsification time, IOL, and intracameral injections including viscoelastic type. Both univariate and multivariate statistical analyses were
performed to evaluate associations among variables with FW formation.
Results: Data from 398 eyes on 201 dogs were included; 4 left eyes (4 dogs) developed
presumptive endophthalmitis and were excluded from further analysis. Forty-eight eyes
did not have cataract surgery. Hence, 350 eyes on 201 dogs were included in the analyses. Among these, 84 eyes (59 dogs) developed a FW. Univariate analyses showed that
the odds of FW increased with age and phacoemulsification time. Additionally, FW
web was associated lens type, lens brand, and viscoelastic type. Multivariate analyses
showed that when comparing lens types in combination with a particular viscoelastic,
viscoelastic impacted the estimated prevalence of FW formation the most. In contrast,
when the data were analyzed by lens brand, lens brand impacted prevalence more than
viscoelastic type. Diabetes mellitus was not associated with FW formation.
Conclusions: Based on the available data, intraocular lens implantation, viscoelastic type,
dog age, and phacoemulsification time were associated with FW formation. Diabetes
mellitus, gender, cataract stage, surgeon, intracameral injections other than viscoeleastic,
and intra- and postoperative complications were not associated with FW formation.