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Medical condition
Nasolacrimal duct obstruction
Other names
Dacryocystitis
Tear system consists of lacrimal gland (a), punctums (b,e), canalicules (c,f), lacrimal sac (d). Tear is then drained through nasolacrimal duct (g) into nasal cavity
Specialty
Ophthalmology
Differential diagnosis
Tears arising from lacrimal sac fistula.[1]
See also: Dacryocystitis
Nasolacrimal duct obstruction is the obstruction of the nasolacrimal duct and may be either congenital or acquired. Obstruction of the nasolacrimal duct leads to the excess overflow of tears called epiphora.[2]
^Nerad, Jeffrey A.; Carter, Keith D.; Alford, Mark (2008). "Disorders of the Lacrimal System: Congenital Obstruction". Oculoplastic and Reconstructive Surgery. Elsevier. pp. 131–137. doi:10.1016/b978-0-323-05386-0.50010-7. ISBN 978-0-323-05386-0. This tearing is different (from Dacryocystitis), as it originates from the fistula located below the eyelid on the cheek (may be associated with nasolacrimal duct obstruction).
^Cite error: The named reference yanoff was invoked but never defined (see the help page).
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Nasolacrimalductobstruction is the obstruction of the nasolacrimalduct and may be either congenital or acquired. Obstruction of the nasolacrimal duct...
Dacryocystitis is an infection of the lacrimal sac, secondary to obstruction of the nasolacrimalduct at the junction of lacrimal sac. The term derives from the...
they are not visually significant. Strabismus, nystagmus and nasolacrimalductobstruction occur more frequently in children with Down syndrome. Screening...
consequence of narrowing or obstruction of the nasolacrimalduct, usually during prenatal development. Nasolacrimalductobstruction disrupts the lacrimal drainage...
tubing, wound dressings, silos for abdominal wall defects, and nasolacrimalductobstruction. These medical-grade elastomers are also used in the manufacture...
restore the flow of tears into the nose from the lacrimal sac when the nasolacrimalduct does not function. A small incision is made on the side of the nose...
connected to the nasal mucosa above the level of the mechanical obstruction at the nasolacrimalduct.[citation needed] When, due to an error of diagnosis, the...
external dacryocystorhinostomy, a procedure for the management of nasolacrimalductobstruction, is being researched. Intraoperative antimetabolite application...
sac during excessive lacrimation. The fluid then flows through the nasolacrimalduct and into the nasopharynx. This drainage results in what is commonly...
tears (Alacrima) during emotional crying. Obstruction of the punctum, nasolacrimal canal, or nasolacrimalduct can cause even normal levels of the basal...
A mutation in this gene has been associated with bilateral nasolacrimalductobstruction (LCDD). [provided by RefSeq, Jun 2016]. GRCh38: Ensembl release...
apparatus. It is used to identify obstructions, for example in the lacrimal duct, nasal cavity or nasolacrimalduct. The typical procedure involves use...
may lead to dyspnoea. Epiphora may occur due to malformation of the nasolacrimalducts which causes staining and secondary dermatitis. Their shallow eye...
sac when the nasolacrimalduct does not function. Canaliculodacryocystostomy is a surgical correction for a congenitally blocked tear duct in which the...
congenital disorder of dogs involving the lack of an opening to the nasolacrimalduct (tear duct) in the conjunctiva. Dogs normally have two lacrimal puncta,...
the hairs lining the inner nostril. The nasal cavity contains the nasolacrimalduct, which drains tears from the eyes and out the nose. The nasal passages...
pressure occurs. Blood may also be forced to flow up and through the nasolacrimalduct and out of the eye, producing bloody tears. Risk factors include trauma...
congenital disorder of dogs involving the lack of an opening to the nasolacrimalduct (tear duct) in the conjunctiva. Exophthalmos is a normal condition in brachycephalic...
Excessive moisture as tears collected in the lacrimal sac travel down the nasolacrimalducts where they drain into the inferior meatus in the nasal cavity. Most...
"cuter", they result in many health issues including ill-functioning nasolacrimal systems where tears build and flow down the face, a soft and long palate...
frontal sinuses; and the inferior meatus provides drainage for the nasolacrimalduct. The internal nasal valve comprises the area bounded by the upper...
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