What is the nasolacrimal sac?
The lacrimal sac or lachrymal sac is the upper dilated end of the nasolacrimal duct, and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla.
What is lacrimal sac Mucocele?
Lacrimal sac mucocele (LSM) is characterized by obstruction of the nasolacrimal duct (NLD) with consequent dilatation and distension of the lacrimal sac (LS) by mucopurulent material.
What is the treatment of nasolacrimal duct obstruction?
The primary treatment of uncomplicated nasolacrimal duct obstruction (NLDO) is a regimen of nasolacrimal massage, usually 2 to 3 times per day, accompanied by a cleansing of the lids with warm water and topical antibiotics; this will resolve the infection in 76% to 89% of cases.
Where does the nasolacrimal sac drain?
Excess tears flow through the nasolacrimal duct which drains into the inferior nasal meatus.
What happens if nasolacrimal duct is blocked?
A blockage can occur at any point in the tear drainage system, from the puncta to your nose. When that happens, your tears don’t drain properly, giving you watery eyes and increasing your risk of eye infections and inflammation.
How is nasolacrimal duct obstruction diagnosed?
Tests used to diagnose a blocked tear duct include:
- Tear drainage test. This test measures how quickly your tears are draining.
- Irrigation and probing. Your doctor may flush a saline solution through your tear drainage system to check how well it’s draining.
- Eye imaging tests.
Where is the nasolacrimal duct?
Tear ducts are another name for the nasolacrimal ducts. They form at the corner of your eye nearest your nose. They run underneath the skin and connect to your facial bones and nose.
What causes nasolacrimal duct obstruction in adults?
Nasolacrimal Duct Obstruction Topics. Failure of the thin tissue at the end of the tear duct to open normally is the most common cause. In adults, a blocked tear duct may be due to an injury, infection or a tumor.
Is done to check the blockage or obstruction of lacrimal sac?
Eye imaging tests. For these procedures, a contrast dye is passed from the puncta in the corner of your lid through your tear drainage system. Then X-ray, computerized tomography (CT) or magnetic resonance imaging (MRI) is used to find the location and cause of the blockage.