nasolacrimal duct

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Related to nasolacrimal: nasolacrimal canal, iridoplegia

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 ?
Congenital dacryocystocele is an uncommon variant of nasolacrimal duct obstruction.
The fact that these lesions are located subjacent to the wing of the nose suggests that they might arise from remnants of the nasolacrimal ducts.
The histologic features of nasolabial cysts show striking similarity to the physiologically encountered epithelia in the lacrimal drainage system, specifically the lacrimal canaliculi and sac and the nasolacrimal duct that drain tear fluid from the eye to the inferior meatus of the nose (Figure 1).
Reported lacrimal apparatus malformations have included nasolacrimal duct obstruction and hypoplasia or aplasia of the lacrimal puncta.
Other measures include devices to deliver smaller drops, occlusion of the nasolacrimal punctum and blotting away excess drops after drug administration.
In addition, OculusGen(R) can be used in other selected ophthalmic surgeries, such as pterygium excision, eye plastic surgery, strabismus correction surgery, conjunctiva scar removal surgery, and nasolacrimal duct surgery, etc to prevent scar formation and speed up wound healing.
THE most common cause is nasolacrimal duct obstruction.
A IN babies, watering is often due to under-development of the nasolacrimal system which tends to correct itself by the age of six months.
INDICATIONS AND USAGE: Sodium Pertechnetate Tc 99m Injection is used IN ADULTS as an agent for: Brain Imaging (including cerebral radionuclide angiography), Thyroid Imaging, Salivary Gland Imaging, Placenta Localization, Blood Pool Imaging (including radionuclide angiography), Urinary Bladder Imaging (direct isotopic cystography) for the detection of vesico-ureteral reflux, Nasolacrimal Drainage System Imaging.
10) The tear secretions are drained from the orbit by 2 lacrimal caniculi, situated close to the nasal commissure of the eyelids, which then open via the nasolacrimal duct into the lower portion of the nasal cavity, such that secretions eventually drain into the mouth.
Here, one drop of 1% or 2% fluorescein is applied to the ocular surface, and a sterile cotton bud is placed in the inferior meatus of the nose, close to the valve of Hasner, at the base of the nasolacrimal duct.
To the best of our knowledge, no case of verrucous carcinoma occurring alone or in association with another neoplasm has been described in the nasolacrimal system.