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CMN 568 Exam 1 Questions And Correct Answers
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CMN 568 Exam 1 Questions And CorrectAnswers 2024-2025
proper otoscopic technique
Proper technique:
Note that he is bracing his finger against the child's cheek, if patient moves, so does
otoscope
OTITIS EXTERNA
Cellulitis of the soft tissues of the external auditory canal
-AKA swimmers ear
Otitis externa pathogens
Pseudomonas aeruginosa
Staphylococcus aureus
Aspergillus or other fungi (especially diabetics)
Risk Factors otitis externa
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
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
Acute Otitis Media wTM rupture or patent PE tubes
• Furunculosis of the ear canal, Mastoiditis
Rx of otitis externa
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.
Is specific 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
Topical eardrums unless signs of system infection
Fluoroquinolone drops are first line
Neomycin/polymyxin b/ hydrocortisone cream
-Oral atnitibiotcs for systemic
Fluoroquinolone drops
•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)
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
Neomycin/ Polymyxin B/ Hydrocortisone (Cortisporin otic)
• 3-4 gtts TID-QID for 7-10 days• Do NOT use if TM is perforated or PE tubes in place
Insertion of an ear wick
-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
Otitis externa prevention
• 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)
• 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
• Streptococcus pneumoniae (35-40%) • Haemophilus influenzae (30-35%)• Moraxella
catarrhalis (15-25%)• Streptococcus pyogene
Risk Factors for AOM
Eustachian 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
Clinical Manifestations of AOM • Symptoms:• Ear pain: pulling or tugging on ear in young
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