Exam (elaborations)
CMN 568 Exam 1 Questions and Answers 2024
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Exam of 14 pages for the course CMN 568 at CMN 568 (CMN 568 Exam 1)
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CMN 568 Exam 1proper otoscopic technique - answer Proper technique:
Note that he is bracing his finger against the child's cheek, if patient moves, so does
otoscope
OTITIS EXTERNA - answer Cellulitis of the soft tissues of the external auditory canal
-AKA swimmers ear
Otitis externa pathogens - answer Pseudomonas aeruginosa
Staphylococcus aureus
Aspergillus or other fungi (especially diabetics)
Risk Factors otitis externa - answer Moisture in the ear from swimming, showering, etc
Trauma to the external canal from Q-tips, ear plugs, hearing aids, or scratching
Keeping ears too clean removes protective cerumen and increases pH which promotes
bacterial growth
s/s of otitis externa - answer Edema and erythema of external canal, may be swollen
shut
Severe ear pain, made worse by movement of the pinna or tragus
Purulent discharge from the external canal, canal may be filled with debris, making
visualization of the TM difficult or impossible
May have periauricular or cervical lymphadenopathy
Differential Dx of otitis externa - answer Acute Otitis Media with TM rupture or patent PE
tubes
• Furunculosis of the ear canal, Mastoiditis
treatment of otitis externa - answer Careful exam to see if the TM is intact. If you can
not visualize the TM due to swelling or debris, you MUST assume perforation and
manage accordingly.
-Gentle removal of debris from canal if possible. If TM is intact, gently irrigate with NS
and a bulb syringe. Do NOT irrigate if TM not visualized.
Pain control: Tylenol or Ibuprofen for mild pain, may need narcotic analgesic for severe
pain.
Antibiotics for otitis externa - answer-Topical eardrums unless signs of system infection
-Fluoroquinolone drops are first line
-Neomycin/polymyxin b/hydrocortisone cream
-oral atnitibiotcs for systemic
, Fluoroquinolone drops - answer• Covers pseudomonas and Staph
• Safe to use if TM is perforated or PE tubes are in place
Ciprofloxacin/dexamethasone (Ciprodex) contain cipro and a
steroid for inflammation. (4g gtts BID x 7 days)
Ciprofloxacin otic alone (.25ml BID x 7days)
Ciprofloxicin otic liquid to gel (Otiprio): 0.2ml in ear x 1
Ciprofloxacin/dexamethasone (Ciprodex) - answercontain cipro and a
steroid for inflammation. (4g gtts BID x 7 days)
Ciprofloxacin otic alone - answer(.25ml BID x 7days)
Ciprofloxicin otic liquid to gel (Otiprio) - answer0.2ml in ear x 1
Neomycin/ Polymyxin B/ Hydrocortisone (Cortisporin otic) - answer• 3-4 gtts TID-QID for
7-10 days• Do NOT use if TM is perforated or PE tubes in place
Use of an ear wick - answer-If canal is swollen, insert a Pope ear wick to allow antibiotic
drops to get deep into canal.
-Insert dry wick, then moisten with ear drops to expand
-Wick will fall out when swelling decreases
Prevention of otitis externa - answer• Avoid vigorous ear cleaning which removes
protective cerumen and changes pH
• Avoid use of Q-tips which can damage ear canal
• Use drying agents after swimming:• 2-3 gtts of 1:1 solution of white vinegar/ 70% ethyl
alcohol • Commercial products such as Swim Ear drops• Acidify and dry canal to inhibit
bacterial growth
Acute otitis media (AOM) - answer• Acute infection of the middle ear space with
inflammation and effusion
• 2 things must be present to diagnose:
A bulging TM
Middle ear effusion (MEE) as demonstrated by pneumatic otoscopy or tympanometry
Pathogens of AOM - answer• Streptococcus pneumoniae (35-40%) • Haemophilus
influenzae (30-35%)• Moraxella catarrhalis (15-25%)• Streptococcus pyogene
Risk Factors for AOM - answerEustachian tube dysfunction: equalizes pressure and
allows drainage from middle ear. Tubes in infants are shorter, wider, floppier and more
horizontal that in adults, making them prone to dysfunction.
Bacterial colonization of the nasopharynx with AOM pathogens
Viral URI: inflammation of eustachian tubes impairs function leading to middle ear
effusion
Smoke exposure: inflames eustachian tubes, impeds drainage, and increases pathogen
colonization
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