Frontal Sinus Flashcards
1
Q
frontal sinus outflow tract
A
drains via small outflow tract into the ethmoid sinus/ nasal cavity. Hour glass shaped with true ostium 3-4 mm narrowest portion.
frontal ostium superiorly to the ethmoid infundibulum or middle meatus inferiorly
the inferior compartment is narrow passageway formed by either the ethmoid infundibulum or the middle meatus – then communicates with the middle meatus via the hiatus semilunaris
2
Q
frontal ostium
A
extends between anterior and posterior walls of the frontal sinus
3
Q
A
