nasolacrimal duct


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Related to nasolacrimal duct: nasolacrimal duct obstruction

nasolacrimal duct

[¦nā·zō′lak·rə·məl ′dəkt]
(anatomy)
The membranous duct lodged within the nasolacrimal canal; it gives passage to the tears from the lacrimal sac to the inferior meatus of the nose.
References in periodicals archive ?
Nasolacrimal duct patency test, using rose bengal dye was negative, suggestive of associated nasolacrimal duct obstruction.
Observing patency to nasolacrimal duct lavage through the unaffected canaliculus is important in the differential diagnosis.
None of the cysts were connected to the nasolacrimal duct, and all showed patency of the lacrimal system on syringing after cyst removal, with no evidence of any leakage to the surgical site.
Nasolacrimal duct obstruction--Also referred to as dacryostenosis.
In obstructive cases, dacryocystorhinostomy (endonasal or external) and Lester Jones tubes are the surgical options for nasolacrimal duct and canalicular obstruction, respectively.
Nasolacrimal duct obstruction most commonly presents with ephiphora,1,2 other symptoms are discharge from the eyes and swelling over the sac area.
The favoured aetiological theory, posited by Bruggeman in 1920, suggests an origin from the remnant of the embryonic nasolacrimal duct, and is is supported by the fact that both the nasolacrimal duct and nasolabial cysts are lined by the same pseudostratified columnar epithelium, and also by the fact that the cyst is located subjacent to the wing of the nose, in line with the naso-optic fissure.
All patients underwent standard ophthalmological examination including tonometry, perimetry, biomicroscopy and gonioscopy; washing-out of nasolacrimal duct being performed to assess its patency.
Neonatal respiratory distress: Sequela of bilateral nasolacrimal duct obstruction.
Materials and Methods: Retrospective case record analysis of all children coming to the hospital with congenital malformation of nasolacrimal duct along with other congenital malformations of the eyes were included in the study.
Background: The procedure of choice for the treatment of acquired nasolacrimal duct obstruction is dacryo-cystorhinostomy.