Lecture 3 Nose/Sinus Flashcards
Nasal Function
Warms and Humidifies air Immune Barrier Smell Drainage and aeration of middle ear Drainage of paranasal sinuses and lacrimal duct
Sinus function
Reservoir of warm humid air
Lightens skull allow voices to resonate better
Crumple zones
Immune barrier
Name the features of the external nasal anatomy
Glabella Nasion Dorsum Supratip Tip Collumnella
Name the bones of the external nasal anatomy
Nasal bones Nasal septum Middle crus Lateral crus Medial crus Frontal process of maxilla
Describe the internal nasal anatomy
Midline-septum Roof-skullbase/cribriform Walls-turbinates Floor- hard palate Eustachian tube
Name the bones of the septum
Septal cartilage- anterior
Perpendicular plate of ethmoid bone- superior
Vomer- Inferior
What can cause a septal haematoma and what does it lead to
Post trauma
Septum necroses
leading to perforation (drugs)
Needs to be drained
What is the function fo the turbinates
Increases surface area for humidification and warming
What are the turbinates covered in
Erectile tissue
Responds to temperature
What opens underneath turbinates
Sinuses and nasolacrimal duct
What is the function fo the nasolacrimal duct
Drainage pathway of lacrimal secretions (tears) from lacrimal sac
Where does the naslacrimal duct open into and what does that relate to
Inferior mates
Runny nose when crying
Name the paranasal sinuses
2 Frontal
2 maxillary
Sphenoid
Ethmoid air cells
Where do the anterior ethmoidal air cells drain
Middle nasal meatus via the ethmoidal infundibulum or the frontonasal duct
Where does the middle ethmoidal air cells drain into
Middle nasal meatus with an opening located on or superiorly to the ethmoid bulla
