Sinus Drainage Anatomy

Normally these structures help humidify and filter air. They empty into the nasal cavity at different places.

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The inside of the nose has ridges called turbinates.

Sinus drainage anatomy. Anterior middle and posterior. The sphenoid sinuses drain out onto the roof of the nasal cavity. Normally the sinuses are empty except for a thin layer of mucus.

Please try again later. There are three ethmoidal sinuses. This feature is not available right now.

The relationships of this sinus are of clinical importance the pituitary gland can be surgically accessed via passing through the nasal roof into the sphenoid sinus and through the sphenoid bone. Most individuals have four paired cavities located in the cranial bone or skull. As long as your sinuses are draining properly the increase in mucus isnt a problem although it can be annoying.

The resulting pressure can be intolerable for many people. Sinus anatomy in common usage sinus usually refers to the paranasal sinuses which are air cavities in the cranial bones especially those near the nose and connecting to it. The real problems start when the passages become blocked or fail to let the sinuses drain effectively.

A thin wall called. According to their location the two pairs of anterior and middle ethmoid sinuses drain into the middle nasal meatus the semilunar hiatus and the ethmoid bulla respectively 2 while the posterior ethmoid sinus drains into the superior meatus 9. Sinus drainage can be worsened by a number of factors such as.

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