07.1 Nose and Paranasal Sinuses Flashcards
What are the functions of the nose?
Olfaction
Respiration
Filter and humidify air
Drain paranasal sinus and nasolacrimal secretions
What is the commonest cause of a fracture to the nasal bone?
Force to the face
What can a nose fracture lead to?
Septal haematoma which can undergo necrosis
What bones make up the nasal cavity?
Frontal Nasal Ethmoid Vomer Maxilla Sphenoid
What are the passages between the turbinates called?
Sphenoethmoidal recess
Superior, middle and inferior meatuses
What do the olfactory bulbs pass through?
Cribriform plate
How do the frontal sinuses drain through the ethmoid bone?
Via the infundibulum
What are the 3 main arterial branches that supply the nose?
Facial artery (ECA) Maxillary artery (ECA) Opthalmic artery (ICA)
Where do the 5 named arteries of the nose anastamose?
Kiesselbach’s area
What is the innervation to the nose?
Special - CNI
General - CNV1, CNV2
What are the functions of the paranasal sinsues?
Conditioning of inspired air
Reduces the weight of the skull
Where do the frontal and maxillary sinuses drain into?
Middle meatus
Where does the sphenoid sinus drain into?
Sphenoethmoidal recess
Where does the ethmoid sinus drain into?
Anterior + Middle = Middle meatus
Posterior = Superior meatus
What can occur if the ethmoid bone breaks?
CSF rhinorrhoea
