Conjunctivorhinostomy for Alleviation of Nasolacrimal Duct Obstruction



Practice Tip to Facilitate Procedure

A magnification lens with built-in light source facilitates visualization of the distal NL duct opening. This procedure is greatly facilitated by sedation or general anesthesia.




POTENTIAL COMPLICATIONS


The principal complications are corneal ulceration and reobstruction of the duct. If corneal opacity, excessive tearing, or clinical signs of eye pain occur, the eye should immediately be evaluated for the presence of ulcers and the stents removed. Reobstruction occurs in approximately 10% of cases of membranous obstruction of the distal NL duct opening and 25% of cases of conjunctivorhinostomy.


PATIENT MONITORING/AFTERCARE


Once opened, an ophthalmic antibiotic ointment should be applied two to three times daily for 7 to 10 days or until healed.


REFERENCES


Gionfriddo JR, Friedman DS. 2009. Ophthalmology of South American Camelids: Llamas, Alpacas, Guanacoes, and Vicunas. Current Veterinary Therapy: Food Animal Practice 5th ed. Anderson DE, Rings DM eds. Saunders Elsevier, pp 430–434.


Rubin LF. 1984. Large Animal Ophthalmic Surgery. In The Practice of Large Animal Surgery. Vol. II. Philadelphia, Saunders, pp. 1151–1201.


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Nov 6, 2016 | Posted by in GENERAL | Comments Off on Conjunctivorhinostomy for Alleviation of Nasolacrimal Duct Obstruction

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