Stenting of a partially obstructed nasolacrimal duct using a steerable <scp>angle‐tipped</scp> hydrophilic guidewire in a cat

Park, Shin Ae; Oetelaar, Garrett S.; Kim, Sun Young

doi:10.1111/vop.13012

Veterinary Ophthalmology

2022

DOI: 10.1111/vop.13012

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Stenting of a partially obstructed nasolacrimal duct using a steerable angle‐tipped hydrophilic guidewire in a cat

Shin Ae Park

Garrett S. Oetelaar

Sun Young Kim

Abstract: The nasolacrimal (NL) duct is a drainage system that drains conducts tears from the ocular surface to the nasal cavity. The nasolacrimal drainage system consists of the superior and inferior puncta, superior and inferior canaliculi, lacrimal sac, NL duct, and nasal puncta. 1 Various congenital and acquired diseases of the nasolacrimal duct system have been described in dogs, 2,3 rabbits, 4 cats, 5 horses, 6,7 and cattle. 8 The most common consequence of

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Contrast computed tomography dacryocystorhinography identifies nasolacrimal duct obstruction secondary to chronic dental disease in two chinchilla langeria

Hisey,

Rodriguez,

Tarbert

et al. 2024

Veterinary Ophthalmology

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ObjectiveTo determine the impact of chronic dental disease on the nasolacrimal duct of chinchillas using contrast CT dacryocystorhinography.Animals StudiedTwo 12‐year‐old female chinchillas with uni‐ or bilateral ocular discharge and a history of chronic, moderate (Chinchilla 1, one‐year) or severe (Chinchilla 2, three‐years) dental disease.ProceduresContrast CT dacryocystorhinography was performed to identify abnormalities in the nasolacrimal duct and dentition, and to correlate those changes.ResultsChinchilla 1 had a focal soft tissue attenuating expansion of the maxillary bone rostral to the first left premolar interpreted as possible abscessation causing deviation of the nasolacrimal duct over its dorsomedial margin. The right nasolacrimal duct appeared normal. Chinchilla 2 had periapical abscessation of a retained subgingival left maxillary incisor fragment which extended into the nasal cavity causing focal narrowing and distal dilation of the left nasolacrimal duct. Complete contrast infusion of the right nasolacrimal duct could not be completed on Chinchilla 2. A focal area of superficial corneal fibrosis ipsilateral to the obstructed nasolacrimal duct was also identified in Chinchilla 2. Treatment consisted of occlusal adjustments to correct the coronal elongation, systemic antibiotics (metronidazole and either marbofloxacin or azithromycin), and topical tear replacement therapy and diclofenac as needed. Ocular discharge decreased in both chinchillas but did not resolve long‐term in either animal.ConclusionsChronic dental disease including periapical abscessation in chinchillas can obstruct the nasolacrimal duct, leading to impaired tear drainage. Management of dental disease is crucial to maintain patency of the nasolacrimal duct.

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Contrast computed tomography dacryocystorhinography identifies nasolacrimal duct obstruction secondary to chronic dental disease in two chinchilla langeria

Hisey,

Rodriguez,

Tarbert

et al. 2024

Veterinary Ophthalmology

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The novel use of a sub‐palpebral lavage line as an indwelling stent to manage unilateral nasolacrimal duct obstruction in a cat

Bowden,

Allbaugh

2024

Veterinary Ophthalmology

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ObjectiveTo describe a novel surgical approach to conjunctivorhinostomy for feline nasolacrimal duct obstruction.Animal StudiedA client‐owned 4‐year‐old female spayed domestic shorthair cat presented with chronic unilateral nasolacrimal duct obstruction of the right eye.MethodsFollowing obstruction confirmation via complete ophthalmic examination and dacryocystorhinography, conjunctivorhinostomy was performed under general anesthesia, and an indwelling sub‐palpebral lavage (SPL) line was placed to facilitate the formation of a new pathway for tear drainage. Specifically, the SPL footplate was sutured to the ventral conjunctival fornix with 5‐0 nylon and 6‐0 vicryl while the tubing was passed through the new pathway and the distal end of the tubing trimmed and tucked into a perinasal subcutaneous pocket. Two skin sutures closed the perinasal pocket and were removed 2 weeks postoperatively.ResultsNo immediate postoperative complications occurred. At 6 weeks and 6 months postoperatively, the distal SPL tubing was dislodged and visible out of the right nostril. This was uneventfully trimmed shorter, and no further complications occurred. The SPL component was easily removed 11 months postoperatively without complication. The patient's clinical signs dramatically improved; she was comfortable over 2 years after surgery.ConclusionTo the authors' knowledge, this is the first report of using an SPL as an indwelling catheter for nasolacrimal duct surgery via conjunctivorhinostomy in a cat. This technique eliminated external stent sites for the patient, which was associated with a short use of an e‐collar, and utilized materials readily available in a specialty hospital.

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Stenting of a partially obstructed nasolacrimal duct using a steerable angle‐tipped hydrophilic guidewire in a cat

Cited by 2 publications

References 13 publications

Contrast computed tomography dacryocystorhinography identifies nasolacrimal duct obstruction secondary to chronic dental disease in two chinchilla langeria

Contrast computed tomography dacryocystorhinography identifies nasolacrimal duct obstruction secondary to chronic dental disease in two chinchilla langeria

The novel use of a sub‐palpebral lavage line as an indwelling stent to manage unilateral nasolacrimal duct obstruction in a cat

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