What does the posterior ethmoid sinus open into?
The posterior group the posterior ethmoidal sinus drains into the superior meatus above the middle nasal concha; sometimes one or more opens into the sphenoidal sinus. The anterior group the anterior ethmoidal sinus drains into the middle meatus of the nose by way of the infundibulum.
What separates anterior and posterior ethmoid sinus?
They are separated into anterior and posterior groups by the basal lamella, the lateral attachment of the middle turbinate to the lamina papyracea. Historically the ethmoid sinuses were subdivided into 3 groups of air cells: the anterior, middle and posterior ethmoidal air cells.
Which sinus opens into ethmoidal Bulla?
Ethmoid Sinus The first ethmoid cell encountered is the ethmoid bulla, which is located posterior to the semilunar hiatus and anterior to the basal lamella.
What does the ethmoid sinus do?
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.
Why does my ethmoid sinus hurt?
Sinusitis occurs when mucus backs up in your sinuses and your sinuses become infected. This is usually due to swelling of the nasal passages and your sinus openings. Upper respiratory infections or allergies can ultimately lead to ethmoid sinusitis. Other names for sinusitis include rhinosinusitis.
What is removal of ethmoid sinus?
An ethmoidectomy removes infected tissue and bone in the ethmoid sinuses that blocks natural drainage. The surgeon views your ethmoid sinuses with an endoscope, a thin flexible tube with a very small camera and light at the end of it.
What drains into ethmoid 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 forms ethmoid bulla?
It is formed by pneumatization of the bulla lamella and its degree of pneumatization is variable. In its most extreme form (giant ethmoid bulla), it may fill the entire middle meatus. Failure of pneumatization of the ethmoid bulla is termed torus ethmoidalis 3. It usually opens in the retrobullar recess.
Will ethmoid sinusitis go away on its own?
Most people should find that ethmoid sinusitis resolves on its own with some basic self-care and home remedies. If a doctor thinks that ethmoid sinusitis is due to a bacterial infection, they may prescribe antibiotics, which are usually very effective.