## Acute Suppurative Otitis Media with Spontaneous Perforation ### Microbiology of ASOM | Organism | Frequency | Clinical Context | Antibiotic Sensitivity | |----------|-----------|------------------|------------------------| | **Streptococcus pneumoniae** | 25–35% | Most common in children; post-viral URI | Amoxicillin, cephalosporin | | **Haemophilus influenzae (non-typeable)** | 25–30% | Common in children; post-viral URI | Amoxicillin-clavulanate, cephalosporin | | **Moraxella catarrhalis** | 10–15% | Less common; usually in younger children | Amoxicillin-clavulanate | | **Pseudomonas aeruginosa** | Rare in acute ASOM | Chronic suppurative OM, immunocompromised | Fluoroquinolones, antipseudomonal agents | | **Staphylococcus aureus** | Rare in acute ASOM | Post-traumatic, immunocompromised | Cloxacillin, vancomycin if MRSA | **Key Point:** In a child with acute suppurative otitis media following an upper respiratory tract infection, *Streptococcus pneumoniae* and *Haemophilus influenzae* are the most common pathogens. Pseudomonas and Staphylococcus aureus are rare in acute disease and suggest chronic or immunocompromised states. ### Management of ASOM with Spontaneous Perforation ```mermaid flowchart TD A[ASOM with Spontaneous Perforation]:::outcome --> B{Postauricular tenderness?}:::decision B -->|Yes| C[Assess for mastoiditis]:::action B -->|No| D[Continue antibiotics]:::action C -->|Signs of mastoiditis| E[Imaging + Mastoidectomy]:::urgent C -->|No mastoiditis| D D --> F{Perforation healing?}:::decision F -->|Yes, in 2-4 weeks| G[Observe, continue antibiotics]:::action F -->|No healing after 6-8 weeks| H[Myringoplasty consideration]:::action ``` ### Immediate Management **High-Yield:** When spontaneous perforation has already occurred: 1. **Continue broad-spectrum antibiotics** (amoxicillin-clavulanate or cephalosporin) for 7–10 days 2. **Analgesics** for pain relief 3. **Aural toilet** (gentle cleaning of discharge) 4. **Observation** for healing — most perforations heal spontaneously within 2–4 weeks 5. **Assess for complications** — check for postauricular tenderness, mastoid swelling, or neurological signs **Clinical Pearl:** Spontaneous perforation is actually a favorable prognostic sign in ASOM because it relieves pressure, drains pus, and reduces pain. Most perforations heal completely without intervention if infection is controlled with antibiotics. **Warning:** Do NOT perform myringoplasty immediately. Wait 6–8 weeks to allow spontaneous healing. Myringoplasty is only considered if perforation persists beyond 8 weeks despite appropriate antibiotic therapy. ### Why NOT Mastoidectomy or Myringoplasty Now? - **Mastoidectomy** is indicated only if there are signs of acute mastoiditis (postauricular tenderness, swelling, bony erosion on imaging). This child has no postauricular tenderness, so mastoiditis is not present. - **Myringoplasty** is elective surgery performed only after 6–8 weeks if perforation has not healed spontaneously. It is not indicated in the acute phase. **Mnemonic:** **STOP** for acute perforation management: - **S**pontaneous perforation is favorable (relieves pressure) - **T**reat with antibiotics (7–10 days) - **O**bserve for healing (2–4 weeks) - **P**ostauricular assessment (rule out mastoiditis) [cite: Scott-Brown's Otorhinolaryngology Ch 18; Park 26e Ch 3] 
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