What is the function of the semilunar hiatus?

The hiatus semilunaris is a semicircular shaped opening located on the lateral wall of the nasal cavity. It is a component of the ostiomeatal complex and serves as the opening for the frontal and maxillary sinuses and the anterior ethmoid air cells.

Where does the maxillary sinus drain into?

middle meatus
The maxillary sinus drains into the middle meatus, with the ostium of the sinus opening into the nose on the superior aspect of the medial wall of the sinus, which may explain the high incidence of maxillary sinusitis.

What is the function of maxillary sinus?

The maxillary sinuses might simply serve to improve the respiratory function of the nose. A flow of inspiratory air does not occur. The maxillary sinuses are decisively involved in the production of nitrogen monoxide (NO) and thus in supporting the immune defense of the nasal cavity.

What is Ethmoidal Bulla?

The ethmoid bulla is the largest anterior ethmoid air cell. It is also one of the most consistent air cells in the middle meatus and is therefore a reliable anatomic landmark (Fig. 2.13). It often lacks a posterior wall, which is why it is not called a cell but rather a bony lamella with a large airspace behind it.

Where is Agger Nasi?

Agger nasi air cells are the most anterior ethmoidal air cells lying anterolateral and inferior to the frontal recess and anterior and above the attachment of the middle turbinate. They are located within the lacrimal bone and therefore have as lateral relations the orbit, the lacrimal sac and the nasolacrimal duct.

How do you unclog a maxillary sinus?

Maxillary Sinus Massage

  1. Place each of your index and middle fingers on either side of your nose, just between your cheekbones and upper jaw. Try using your thumbs instead of your index fingers for stronger pressure.
  2. Gently massage this area using a circular motion.
  3. Repeat for around 30 seconds to a minute.

Can maxillary sinus be cured?

Their study showed that more patients were cured or improved more quickly with antibiotic therapy compared to placebo, but also that two thirds of patients receiving placebo recovered spontaneously. In addition, serious complications of bacterial sinusitis were rare.

What drains into ethmoidal bulla?

The middle ethmoid air cells drain into the ethmoidal bulla. The maxillary sinus also drains into the semilunar hiatus here, posteriorly. In the inferior nasal meatus, the pin is in the opening of the nasolacrimal duct, draining the lacrimal sac near the eye into the nasal cavity.

What are ethmoidal cells?

The ethmoid sinuses or ethmoid air cells of the ethmoid bone are one of the four paired paranasal sinuses. The cells are variable in both size and number in the lateral mass of each of the ethmoid bones and cannot be palpated during an extraoral examination. They are divided into anterior and posterior groups.

What is the agger nasi?

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