Treatment of Otitis Media in the OPD Setting

1. Diagnosis - Confirm Before Treating

• Acute onset of symptoms (otalgia, fever, irritability)
• Middle ear effusion (MEE) - bulging TM, air-fluid level, restricted TM mobility on pneumatic otoscopy, flat tympanogram
• Signs of inflammation - moderate-to-severe TM bulging, new-onset otorrhoea (not due to otitis externa), or intense TM erythema

Note: TM erythema alone without MEE = myringitis, NOT AOM. A flaccid, normal TM with ear pain = refer to other causes (dental, TMJ, etc.).

2. Acute Otitis Media (AOM)

Step 1 - Decide: Treat Now vs. Watchful Waiting

Step 2 - Antibiotic Selection

• Amoxicillin
  • Low-risk patients (>6 yrs, no recent antibiotics, no otorrhoea, not in daycare, T <38°C): 40-50 mg/kg/day in divided doses for 5 days
  • High-risk patients (<2 yrs, daycare, antibiotics in past 3 months, otorrhoea, T >38°C): 80-90 mg/kg/day in divided doses for 10 days
  • Adults: 500 mg TID or 875 mg BID for 5-10 days

• Amoxicillin-clavulanate (Augmentin): 80-90 mg/kg/day for 7-10 days
• Cefuroxime axetil: 20-30 mg/kg/day BID for 7-10 days
• Ceftriaxone IM: 50 mg/kg (max 1g) for 1-3 days

• Non-anaphylactic allergy: Cefuroxime axetil or Cefpodoxime
• Anaphylactic (Type I) allergy: Azithromycin or Clarithromycin (though higher resistance rates)
• Ceftriaxone IM is also an option for non-anaphylactic cases

Resistance note: S. pneumoniae resistance to penicillin is 15-50% (varies by region), mediated by altered penicillin-binding proteins - not beta-lactamase. Higher-dose amoxicillin (80-90 mg/kg/day) overcomes most intermediate resistance. H. influenzae and M. catarrhalis resistance is beta-lactamase-mediated, requiring amoxicillin-clavulanate.

Step 3 - Pain Management

• Ibuprofen or Acetaminophen (Paracetamol) - first-line OTC analgesics
• Topical benzocaine ear drops may provide short-term local relief (avoid if TM perforation suspected)

Step 4 - AOM with Perforation / Otorrhoea

• Treat the same as AOM without perforation
• Small perforations from AOM typically heal spontaneously
• If tympanostomy tubes are present with otorrhoea: Treat with ototopical fluoroquinolone drops (e.g., ciprofloxacin-dexamethasone otic drops) - do NOT use aminoglycoside drops (ototoxic with non-intact TM)

3. Otitis Media with Effusion (OME / "Glue Ear")

• Fluid in middle ear WITHOUT signs of acute infection
• Most resolve spontaneously within 3 months - watchful waiting is first-line
• Antibiotics are NOT routinely recommended
• Decongestants and antihistamines are NOT effective (no evidence of benefit)
• If persists >3 months with hearing loss: refer for audiometry and consider myringotomy + grommet (tympanostomy tube) insertion
• Adults with unilateral OME: always exclude nasopharyngeal pathology (carcinoma)

4. Chronic Suppurative Otitis Media (CSOM)

• Persistent otorrhoea through a TM perforation for >2-6 weeks
• Two types: Tubotympanic (safe, mucosal, central perforation) vs. Atticoantral (unsafe, associated with cholesteatoma)

OPD Management:

• Aural toilet - thorough dry mopping or suction clearance of the ear discharge (most important step)
• Topical antibiotic drops:
  • Ciprofloxacin otic drops - preferred (effective, not ototoxic, safe with open TM)
  • Combination antibiotic-steroid drops (e.g., ciprofloxacin + dexamethasone)
  • Avoid aminoglycoside drops (gentamicin, neomycin) if TM is perforated - ototoxic risk
• Systemic antibiotics if cellulitis or systemic signs present

• Atticoantral disease or suspected cholesteatoma (unsafe CSOM)
• No response to 4-6 weeks of medical treatment
• Hearing aid assessment required
• Surgical options: myringoplasty, tympanoplasty, mastoidectomy

5. Recurrent AOM

• Defined as ≥3 episodes in 6 months or ≥4 episodes in 12 months
• Refer for ENT evaluation
• Consider tympanostomy tubes (grommets) - reduces recurrence frequency
• Address modifiable risk factors: eliminate passive smoke exposure, stop supine bottle feeding, limit daycare exposure, treat allergies

6. Prevention

• Pneumococcal conjugate vaccine (PCV13/15/20) - significantly reduces AOM incidence
• Influenza vaccine - annual vaccination reduces virus-triggered AOM
• Breastfeeding (protective)
• Avoiding supine bottle feeding
• Limiting pacifier use after 6 months

7. Red Flags - Admit / Urgent Referral

• Mastoiditis: Post-auricular erythema, tenderness, auricular protrusion - get CT, urgent ENT referral
• Meningitis/intracranial extension: Severe headache, neck stiffness, altered consciousness
• Facial nerve palsy
• Labyrinthitis: Vertigo, sensorineural hearing loss
• Necrotizing (malignant) otitis media: In diabetic/immunocompromised patients with OE not responding to treatment - systemic ciprofloxacin + urgent ENT + CT

• Textbook of Family Medicine 9e (Rakel), Chapter 18 - Otitis Media
• Rosen's Emergency Medicine: Concepts and Clinical Practice
• Cummings Otolaryngology: Head and Neck Surgery
• Scott-Brown's Otorhinolaryngology Head & Neck Surgery