External Ear Infections - Blake Flashcards
How far distally and proximally can otitis media extend?
Distally to the pinna and proximally to the tympanic membrane
What is malignant necrotizing otitis externa?
rare complication where it invades the surrounding soft tissue and bone
What are the predisposing factors to chronic otitis media that lasts three months or longer?
allergies, chronic derm conditions, or badly treated acute otitis externa
What are the two most common bacterial causes of otitis externa?
S. aureus and Pseudomonas aeruginosa
What percent of cases are polymicrobial?
one third
(Viral/fungal) otitis externa happens in pts that were previously treated with abx
fungal
What is the mechanism that the common risk factors such as swimming and cleaning your ears uses to give you otitis externa?
loss of cerumin barrier and disruption of the epithelium leading to inoculation with bacteria and increase in canal pH
T/F: don’t use Q tips
DO YOU REALLY NEED THIS ONE COLT?
When do you use acetic acid drops for the ear?
after water exposure
What symptom best correlates with the severity of the ear infection?
pain
Fevers beyond 101F suggest what?
extension beyond the ear canal
T/F: acute otitis externa is a form of cellulitis
true
What are the two most common fungal causes of otitis externa?
Aspergillus and candida
T/F: you may give topical antimicrobials without having to give topical corticosteroids alongside them
true
which causes symptom relief faster: topical antimicrobials or oral antibiotics?
topical antimicrobials