Nose Flashcards
what makes up the external nose?
ala dorsum skin nares cartilage and bone
what are the functions of the nose?
respiration
olfaction
filter and humidify
drain secretions
what is a nasal fracture?
this is the most common fracture and can occur due to a blow to nose
causes a marked deformity
complications include septal haematoma
what bones contribute to the nose?
nasal frontal vomer palatine maxilla sphenoid ethmoid
what is the medial wall of the nasal cavity?
formed by: ethmoid vomer palatine and maxilla septal cartilage
what is on the lateral wall of the nasal cavity?
conchae which increase surface area and turbulence
what opens into the nasal cavity to drain?
nasolacrimal secretions
ear secretions
sinus secretions
what are the passages of the nasal cavity?
sphenoethmoidal recess
superior, middle and inferior meatus
explain the features of the ethmoid bone
crista gali ethmoid bulla perpendicular plate infundibulum ethmoidal labyrtinths
what are the openings into the ethmoid?
spenopalatine
foramen cecum
cribiform plate
incisive foramen
what is the blood supply to the nose?
sphenopalatine artery
superior labile
anterior and posterior ethmoidal
greater palatine
what is kiesselbachs area?
an area in the front of the nose where all blood supply meets and therefore there is high supply and is suseptable to damage.
90% of nosebleeds occur here
what is the venous drainage of the nose?
the cavernous sinus
pterygoid plexus
facial vein
define epitaxis
nose bleeds
name local causes of nosebleeds?
foriegn body
trauma/graze
