Cat Blocked Tear Duct - Using a lacrimal cannula (e.g., 24-26 gauge), sterile saline is gently flushed through the superior punctum. Patency is confirmed if fluid flows freely from the nostril. Resistance or reflux from the same punctum indicates obstruction. Feline nasolacrimal duct obstruction is a manageable yet often chronic condition that requires a systematic diagnostic approach. The fluorescein dye transit test and ductal flushing remain essential diagnostic and therapeutic tools. Clinicians should differentiate congenital (breed-associated) from acquired (inflammatory, neoplastic, traumatic) causes to guide prognosis and treatment. While medical management suffices for mild cases, surgical bypass is available for severe, refractory obstructions. Further research into the role of viral rhinitis in chronic feline NLDO would improve long-term management strategies. cat blocked tear duct [Generated for educational purposes] Publication Date: [Current Date] Using a lacrimal cannula (e Epiphora is a common presenting complaint in feline veterinary practice. While differential diagnoses include excessive tear production (e.g., reflex tearing due to corneal ulcers or uveitis) or poor eyelid conformation (e.g., entropion), a significant proportion of cases are attributed to obstruction of the nasolacrimal drainage system. The condition can be congenital, often seen in brachycephalic breeds, or acquired secondary to trauma, inflammation, or neoplasia. Chronic obstruction can lead to mucoid discharge, bacterial dacryocystitis (inflammation of the lacrimal sac), and discomfort. This paper aims to provide a comprehensive overview of NLDO in cats, equipping clinicians with the knowledge to diagnose and manage this condition effectively. Feline nasolacrimal duct obstruction is a manageable yet The feline nasolacrimal system begins at the superior and inferior puncta, small openings located on the upper and lower eyelids at the medial canthus (inner corner of the eye). These puncta lead into the canaliculi, which converge to form the lacrimal sac. From the lacrimal sac, the nasolacrimal duct descends through the bony lacrimal canal and empties into the nasal vestibule. Unlike in dogs, the feline duct typically has a narrower lumen and a more tortuous course, making it potentially more susceptible to complete obstruction. The distal opening (nasal punctum) is located approximately 2–5 mm inside the nostril on the floor of the nasal vestibule. A 4-year-old Persian cat presented with chronic left-sided brownish ocular discharge. Schirmer tear test and corneal staining were normal. Fluorescein dye failed to reach the left nostril after 15 minutes. Nasolacrimal flushing with saline encountered mild resistance, followed by reflux of mucoid debris. No foreign body or mass was seen on skull CT. The cat was diagnosed with chronic idiopathic partial obstruction. Treatment consisted of weekly ductal flushing under sedation and topical antibiotic-steroid ointment for 4 weeks, resulting in decreased discharge. The owner was advised of possible recurrence. Feline Nasolacrimal Duct Obstruction: Etiology, Clinical Presentation, Diagnosis, and Management
Using a lacrimal cannula (e.g., 24-26 gauge), sterile saline is gently flushed through the superior punctum. Patency is confirmed if fluid flows freely from the nostril. Resistance or reflux from the same punctum indicates obstruction. Feline nasolacrimal duct obstruction is a manageable yet often chronic condition that requires a systematic diagnostic approach. The fluorescein dye transit test and ductal flushing remain essential diagnostic and therapeutic tools. Clinicians should differentiate congenital (breed-associated) from acquired (inflammatory, neoplastic, traumatic) causes to guide prognosis and treatment. While medical management suffices for mild cases, surgical bypass is available for severe, refractory obstructions. Further research into the role of viral rhinitis in chronic feline NLDO would improve long-term management strategies. [Generated for educational purposes] Publication Date: [Current Date] Epiphora is a common presenting complaint in feline veterinary practice. While differential diagnoses include excessive tear production (e.g., reflex tearing due to corneal ulcers or uveitis) or poor eyelid conformation (e.g., entropion), a significant proportion of cases are attributed to obstruction of the nasolacrimal drainage system. The condition can be congenital, often seen in brachycephalic breeds, or acquired secondary to trauma, inflammation, or neoplasia. Chronic obstruction can lead to mucoid discharge, bacterial dacryocystitis (inflammation of the lacrimal sac), and discomfort. This paper aims to provide a comprehensive overview of NLDO in cats, equipping clinicians with the knowledge to diagnose and manage this condition effectively. The feline nasolacrimal system begins at the superior and inferior puncta, small openings located on the upper and lower eyelids at the medial canthus (inner corner of the eye). These puncta lead into the canaliculi, which converge to form the lacrimal sac. From the lacrimal sac, the nasolacrimal duct descends through the bony lacrimal canal and empties into the nasal vestibule. Unlike in dogs, the feline duct typically has a narrower lumen and a more tortuous course, making it potentially more susceptible to complete obstruction. The distal opening (nasal punctum) is located approximately 2–5 mm inside the nostril on the floor of the nasal vestibule. A 4-year-old Persian cat presented with chronic left-sided brownish ocular discharge. Schirmer tear test and corneal staining were normal. Fluorescein dye failed to reach the left nostril after 15 minutes. Nasolacrimal flushing with saline encountered mild resistance, followed by reflux of mucoid debris. No foreign body or mass was seen on skull CT. The cat was diagnosed with chronic idiopathic partial obstruction. Treatment consisted of weekly ductal flushing under sedation and topical antibiotic-steroid ointment for 4 weeks, resulting in decreased discharge. The owner was advised of possible recurrence. Feline Nasolacrimal Duct Obstruction: Etiology, Clinical Presentation, Diagnosis, and Management