Canaliculorhinostomy as a treatment for nasolacrimal duct obstruction in dogs and cats.

Abstract

OBJECTIVES: To create a replacement nasolacrimal system, using the puncta and canaliculi, with prolonged implant retention and minimal use of Elizabethan collars or other restraint devices. MATERIALS AND METHODS: The method was used in 11 dogs and two cats. Silicone tubing was placed through both canaliculi and, via a drill hole, into the nasal cavity. Distally, the tubing ends were tied in a subcutaneous pocket lateral to the premaxilla. Tubing retention time was 4 to 7 months. Elizabethan collars were used only until skin suture removal at 2 weeks. RESULTS: In all animals, a functional nasolacrimal system was re-created and remained patent over prolonged follow-up periods. Adverse effects and complications were mild. CLINICAL SIGNIFICANCE: The described method is relatively straightforward, thereby making relief of tear outflow problems widely accessible.