Treatment of Otomastoiditis
Initial Assessment and Management
- The American Academy of Otolaryngology-Head and Neck Surgery recommends initial management of otomastoiditis with intravenous broad-spectrum antibiotics as first-line treatment, with consideration of myringotomy with or without tympanostomy tube insertion 1, 2
- Otomastoiditis is a serious complication of acute otitis media that requires prompt and aggressive treatment to prevent intracranial complications 3
- Pain management is a critical component of care for patients with otomastoiditis 4
Antibiotic Therapy
- The American Academy of Otolaryngology-Head and Neck Surgery recommends starting intravenous antibiotics immediately upon diagnosis of otomastoiditis 3, 2
Surgical Management Algorithm
- The American Academy of Otolaryngology-Head and Neck Surgery recommends an initial conservative approach with intravenous antibiotics with or without myringotomy for 0-48 hours, followed by reassessment and possible surgical intervention if there is no improvement or if complications develop 3, 1, 2
- Mastoidectomy is the standard surgical approach for complicated cases of otomastoiditis 3
Imaging
- The American Academy of Otolaryngology-Head and Neck Surgery recommends CT scanning if the patient fails to improve after 48 hours of IV antibiotics, or if there is clinical deterioration at any point, to identify complications such as intracranial complications 3
Complications and Special Considerations
- Brain abscess is the most common intracranial complication of otomastoiditis, and other complications include sigmoid sinus thrombosis 3
- No reliable clinical signs distinguish patients with coexistent intracranial complications, making imaging crucial in non-resolving cases 3
- Anticoagulation may be considered for sigmoid sinus thrombosis, though evidence is limited 3
Treatment Success Rates
- Treatment success rates for otomastoiditis vary, with antibiotics alone achieving success in 10% of cases, antibiotics plus myringotomy in 68% of cases, and antibiotics plus mastoidectomy in 22% of cases 3
Pitfalls and Caveats
- Prior antibiotic treatment does not prevent the development of mastoiditis, with 33-81% of patients diagnosed with acute mastoiditis having received antibiotics before admission 3
Management of Otomastoiditis
Antibiotic Therapy
- For patients who fail initial therapy, antibiotic choices should be guided by culture results when available, and consider Clindamycin with or without coverage for Haemophilus influenzae and Moraxella catarrhalis, according to the American Academy of Pediatrics 5
- Once clinical improvement is noted, transition to oral antibiotics may be considered, as recommended by the American Academy of Pediatrics 5
- Persistent middle ear effusion is common after resolution of acute symptoms and should be monitored, with guidance from the American Academy of Pediatrics 5
- Regular follow-up is important to ensure complete resolution and to monitor for potential complications or recurrence, as advised by the American Academy of Pediatrics 5
Treatment of Otomastoiditis
Follow-up Care
- Hearing assessment should be performed if effusion persists for ≥3 months, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 6, 7
Antibiotic Treatment for Complicated Mastoiditis
Special Considerations for Pathogen Coverage
- The Infectious Diseases Society of America recommends broader antibiotic coverage for complicated mastoiditis, including vancomycin plus one of the following options: piperacillin-tazobactam, a carbapenem, ceftriaxone plus metronidazole, or a fluoroquinolone plus metronidazole 8
- For cases with confirmed Streptococcus pyogenes, the Infectious Diseases Society of America suggests considering adding clindamycin to penicillin therapy 8
IV Augmentin Dosing for Acute Mastoiditis
Specific Dosing Calculation
- For a child with acute mastoiditis, the American Academy of Pediatrics recommends administering IV amoxicillin-clavulanate at 40-90 mg/kg/day of the amoxicillin component, divided into 2-3 doses, not exceeding 4000 mg/day total, with the higher end of dosing (around 80-90 mg/kg/day) preferred for serious infections like mastoiditis 9
- Weight-based dosing at 80-90 mg/kg/day for serious infection translates to approximately 4240-4770 mg/day of amoxicillin component, but the maximum daily dose should be capped at 4000 mg/day according to guidelines 9
- A practical regimen is to administer 1333 mg IV every 8 hours (total 4000 mg/day) or 2000 mg IV every 12 hours (total 4000 mg/day) 9
Imaging and Management of Mastoiditis
Diagnostic Imaging
- Obtain CT temporal bone with IV contrast if patient fails to improve or deteriorates, as this provides high spatial resolution for assessing bony erosion and intratemporal complications, as recommended by the American College of Radiology 10
- Consider MRI without and with IV contrast if intracranial complications are suspected, as MRI has higher sensitivity and specificity than CT for detecting brain abscess, subdural empyema, meningitis, or dural venous sinus thrombosis, according to the American College of Radiology 10
Monitoring for Complications
- Monitor for sigmoid sinus thrombosis, seizures, meningismus, neck rigidity, and neurological deficits, with vigilant monitoring required for complications, as suggested by the American College of Radiology 10
Oral Antibiotic Options for Mastoiditis
Recommended Oral Antibiotic Regimens
- The American Academy of Pediatrics recommends high-dose amoxicillin-clavulanate as the preferred oral agent for step-down therapy in children with mastoiditis, at a dose of 80-90 mg/kg/day of amoxicillin component, divided twice daily (maximum 4000 mg/day) 11
- The American Academy of Otolaryngology-Head and Neck Surgery recommends high-dose amoxicillin-clavulanate as the preferred oral agent for step-down therapy in adults with mastoiditis, at a dose of 2000 mg twice daily or equivalent high-dose formulation 12
- For patients with a non-immediate hypersensitivity to β-lactams, the American Academy of Pediatrics and the American Academy of Otolaryngology-Head and Neck Surgery recommend considering cefdinir, cefpodoxime proxetil, or cefuroxime axetil as alternative oral cephalosporins 11, 12
- For patients with an immediate Type I hypersensitivity to β-lactams, the American Academy of Pediatrics recommends clindamycin (for gram-positive coverage) plus an agent covering H. influenzae and M. catarrhalis such as cefixime or cefdinir 11
- Macrolides (azithromycin, clarithromycin) have high failure rates (20-25%) due to pneumococcal resistance and should be avoided, according to the American Academy of Otolaryngology-Head and Neck Surgery and the American Academy of Pediatrics 11, 12
Critical Monitoring After Transition
- The American Academy of Pediatrics recommends reassessing patients within 48-72 hours of switching to oral therapy to ensure continued improvement 11
Common Pitfalls to Avoid
- The American Academy of Otolaryngology-Head and Neck Surgery and the American Academy of Pediatrics recommend avoiding trimethoprim-sulfamethoxazole or macrolides as step-down therapy due to substantial pneumococcal resistance (20-25% failure rates) 11, 12
- Persistent middle ear effusion is expected, with 60-70% of children having middle ear effusion 2 weeks after treatment, decreasing to 10-25% at 3 months, and does not require antibiotic continuation unless symptomatic, according to the American Academy of Pediatrics 11
Management of Mastoid Effusion Post-Fall
Monitoring for Complications
- Children with mastoiditis are at particularly high risk for venous sinus thrombosis, and consideration of CTV or MRV is recommended if suspected, according to the American College of Radiology 13, 14
- Meningitis or subdural empyema are potential intracranial complications, and imaging is crucial in non-resolving cases, as suggested by the American College of Radiology 14