Nasolacrimal Duct

The Nasolacrimal Duct, also known as the lacrimal duct, is part of the lacrimal system responsible for draining tears from the eye into the nasal cavity. This duct runs inside a canal called the nasolacrimal canal, which begins in the lacrimal sac and ends in the inferior meatus.

The function of the Nasolacrimal duct is to drain excess tears from the eye that accumulate in the lacrimal sac. The lacrimal sac is a sac located in the corner of the eye socket that collects tears produced by the lacrimal glands. As tears accumulate in the sac, they begin to flow through the nasolacrimal duct into the inferior nasal passage, where they then typically evaporate.

When the nasolacrimal duct is blocked or becomes insufficiently clear, a condition known as lacrimation can occur. This occurs when tears cannot drain properly from the eye and begin to flow down the cheeks. Watery eyes can be caused by a variety of causes, including infection, inflammation, or abnormalities in the tear system.

In some cases, a blocked nasolacrimal duct can lead to an infection called dacryocystitis. This condition occurs when bacteria begin to multiply in difficult-to-drain tear glands, leading to inflammation and swelling.

Treatment for a blocked nasolacrimal duct may include massage of the lacrimal sac, use of anti-inflammatory medications and antibiotics, and surgical procedures to restore normal tear drainage.

In conclusion, prot.

The Nasolacrimal Duct is a duct passing in the canal of the same name (nasolacrimal canal). Through it, tears flow from the lacrimal sac into the lower nasal passage.

The Nasolacrimal duct starts from the lacrimal sac and passes through the bone canal of the same name on the lower wall of the orbit. The length of the duct is approximately 12-15 mm. The duct opens into the inferior meatus under the inferior turbinate.

The main function of the Nasolacrimal Duct is to drain tear fluid from the eye cavity into the nasopharynx. Through this duct, the tear fluid produced by the lacrimal gland flows into the nasopharynx. This helps keep the surface of the eye moist and clean.

Violation of the patency of the Nasolacrimal Duct can lead to the development of dacryocystitis - inflammation of the lacrimal sac. This is manifested by lacrimation and swelling in the area of ​​the lacrimal sac. To restore the outflow of tears in dacryocystitis, surgical treatment can be used.

Thus, the Nasolacrimal Duct plays an important role in ensuring the normal functioning and protection of the eye by draining tear fluid into the nasopharynx. Violation of its patency leads to the development of pathological conditions.

Title of the article: “Nasolacrimal Duct” or “Nasolacrimal Duct” Brief description:

Everyone knows that a person cries. Tears help wash the eyes and are removed from the cavity of the eyeball through a small channel, which has a certain length and is located very close to the inner surface of the upper eyelid of the eye - in the inner corner of the eyelid. This canal is the inferior nasal opening (also known as the nasolacrimal opening). Thus, the tear fluid is transferred into the nasal cavity, and it comes out through the nasal passages. In the area of ​​​​this connection between the eye and the nose, an excess amount of tear fluid is usually formed, and therefore a very unpleasant burning sensation occurs on the nasal mucosa. Infrequently opening sebaceous glands as a cause of tearing (miosis, epical lysis or conjunctivitis), as well as irritation of the outer layer of the eye (conjunctiva) or foreign body entering the eye can lead to excessive tear production in the eyes, but this article will talk about a different method. The purpose of this article is to talk about the Nasal mucous duct, its properties and pathological changes, and to touch upon methods of treatment and diagnosis of diseases. All these facts are about absolutely every norm of a healthy body. And also tell about the consequences of disruption of the nasolacrimal duct. Every person has at least once felt this unpleasant thing when tears begin to flow “just like that.” But this leads to a decrease in the quality of life. The main symptoms of the disease are loss of shine in the eyes and the appearance of dark circles. Often patients complain of burning and pain in the sinuses, as if they were touched from the inside. If you would like to learn more about the causes of these symptoms, please continue reading this article. Functions of the nasolacrimal ducts The nasolacrimal ducts have several important functions:

1. Outflow of fluid that is released from the eyes. 2. Normal functioning of the ciliary body of the eye. 3. Regulation of the production and release of fluid from the tear ducts. 4. Direct saliva into the mouth. 5. Connect the 1st ventricles with the nasal passages. **Nasal mucous ducts** refer to a peculiar type of gill openings, which in our body are responsible for the outflow of secreted fluid. The ducts have different lengths, individual for each person. In addition, due to their different parameters, pressure increases. In embryos, the superior and inferior blind slits of the duct sometimes have different directions of fluid outflow. Due to this, the child has a slightly different structure of the nasal cavity