rhinology Flashcards
Distance from anterior lacrimal crest to anterior ethmoid artery
24 mm
Distance from anterior ethmoid artery foramen to posterior ethmoid foramen
12mm
Distance from posterior ethmoid foramen to optic nerve
6 mm
What is the location of the anterior ethmoid artery endoscopically
between the second and third lamella
What is the distance from the posterior aspect of the frontal recess to the anterior ethmoid artery
Mean of 11mm
What is ohgren’s line?
Line from angle of mandible to medial canthus, delineates that any tumor above this line is more likely to have worse prognosis as it is more likely to invade skull base
What arteries make up woodruff’s plexus?
posterior nasal, sphenopalatine, and ascending pharyngeal veins
Name the landmarks for the sphenoid sinus
Landmarks: 30° angle relative to nasal floor, 1/3 distance superiorly from choana to
skull base, 7 cm from nasal sill, at the same latitude as the roof of the maxillary sinus
What is Foster Kennedy Syndrome?
unilateral anosmia, optic atrophy, and papilledema due to
frontal lobe masses
What percentage decrease in nasal resistance as measured by rhinomanometry indicates that congestion is caused by mucosal inflammation/edema?
> 35% (person is given decongestant and resistance is measured before and after)
what is Hollman-MIller sign
anterior bowing of posterior maxillary sinus wall indicating a juvenile nasal angiofibroma
whats the physiology behind pregnancy related nasal congestion
Estrogen inhibits ACh-esterase -> elevated ACh levels increased parasympathetic tone
Treatment of anosmia after URI
prednisone 60 mg then rapid taper
Stages of Rhinoscleroma
Catarrhal stage - foul rhinorrhea
Atrophic - plaques and crusts
Granulomatous stage - nodules in airway
Fibrosis and stenosis
Antibiotics for rhinoscleroma
streptomycin/tetracycline
