Where do the sinuses drain meatus?
Where do the sinuses drain meatus?
The posterior ethmoid and sphenoid sinuses drain into the superior meatus below the superior turbinate. The ostia of the maxillary, anterior ethmoid, and frontal sinuses share a common site of drainage within the middle meatus.
Where does middle ethmoid sinus drain?
middle meatus
The ethmoid sinus is composed of many thin-walled air cells, some of which may extend anteriorly between the lacrimal sac and the nasal mucosa. You commonly encounter a few of these cells during a DCR. As we said above, the anterior and middle air cells of the sinus drain into the middle meatus of the nose.
Which sinuses drain into the middle meatus of the Osteomeatal complex?
maxillary sinus
The ostiomeatal complex (OMC) or ostiomeatal unit (OMU), sometimes less correctly spelled as osteomeatal complex, is a common channel that links the frontal sinus, anterior ethmoid air cells and the maxillary sinus to the middle meatus, allowing airflow and mucociliary drainage.
Where do each paranasal sinuses drain?
The paranasal sinuses are divided per their drainage systems into anterior sinuses group (maxillary, anterior ethmoid, and frontal sinuses) which drains into the middle meatus through the anterior ostiomeatal unit.
What does the inferior meatus drain?
The inferior meatus is the space between the floor of the nasal cavity and the inferior turbinate. The nasolacrimal duct (tear duct) empties any drainage from the eyes, starting at the external eye and emptying into the inferior meatus.
Where are the ethmoid sinuses located within the ethmoid bone?
A type of paranasal sinus (a hollow space in the bones around the nose). Ethmoid sinuses are found in the spongy ethmoid bone in the upper part of the nose between the eyes. They are lined with cells that make mucus to keep the nose from drying out.
Where is the middle meatus in the nose?
The superior meatus occupies the middle third of the nasal cavity’s lateral wall. The middle meatus is the middle-sized and located nasal opening, lying underneath the middle concha and above the inferior concha where the meatus extends along its length.
What drains into inferior meatus?
The inferior meatus (plural: meatus) is an air passage of the lateral nasal cavity located between the inferior nasal concha and lateral nasal wall. The nasolacrimal duct drains into the inferior meatus, and Woodruff plexus is located posteriorly.
What is the function of paranasal sinuses?
They are centered on the nasal cavity and have various functions, including lightening the weight of the head, humidifying and heating inhaled air, increasing the resonance of speech, and serving as a crumple zone to protect vital structures in the event of facial trauma.
What is middle meatus?
The middle meatus is an air passage of the lateral nasal cavity located between the middle nasal concha and lateral nasal wall. The anterior ethmoid air cells, maxillary and frontal sinuses all drain into the middle meatus.
What is middle meatus of nose?
The middle meatus is the middle-sized and located nasal opening, lying underneath the middle concha and above the inferior concha where the meatus extends along its length. It lies below the inferior concha and above the nasal cavity. It extends most of the length of the nasal cavity’s lateral wall.
How do I drain my ethmoid sinus?
3. Sphenoid/ethmoid sinus massage
- Place your index fingers on the bridge of your nose.
- Find the area between your nasal bone and the corner of the eyes.
- Hold a firm pressure in that spot with your fingers for about 15 seconds.
- Then, using your index fingers, stroke downward along the side of the bridge of your nose.
Which sinuses drain into the superior meatus?
The posterior ethmoid and sphenoid sinuses drain into the superior meatus below the superior turbinate. The ostia of the maxillary, anterior ethmoid, and frontal sinuses share a common site of drainage within the middle meatus. This region is called the ostiomeatal complex and can be visualized by coronal CT scan.
What is the function of the superior and middle meatus?
The superior meatus is the drainage area for the posterior ethmoid cells and the sphenoid sinus. The middle meatus provides drainage of anterior ethmoid and the maxillary and frontal sinuses.
What is the function of the inferior meatus in the nose?
The inferior meatus provides drainage of the nasolacrimal duct. The internal nasal valve involves the area bounded by upper lateral cartilage, septum, nasal floor, and anterior head of the inferior turbinate. This makes up the narrowest portion of the nasal airway in the leptorrhine nose.
How does the uncinate process communicate with the middle meatus?
This then communicates with the middle meatus via the hiatus semilunaris; however, when the anterior portion of the uncinate process attaches to the lamina papyracea instead of the skull base, the inferior compartment of the FSDP is then the middle meatus itself ( Fig 5 ).
