Complications of Acute Otitis Media

Red flags 

Acute otitis media (AOM) in the presence of:

  • Sepsis with post auricular swelling
  • Cranial nerve palsy 
  • Symptoms of meningism 
  • Altered conscious state


Why is this important?

The complications of AOM are potentially life-threatening 


When to involve the ENT Registrar

When you suspect a complication of AOM, assess (and, if required, resuscitate) the patient and discuss promptly with the ENT Registrar. You will probably need to discuss imaging needs eg CT head with the Radiology Registrar. You may need to involve the Medical or Paediatric Registrar if a lumbar puncture (LP) is needed and a neurosurgeon if indicated by the results of the LP and imaging.

 

Who to admit

Admit anyone you suspect of having a complication of AOM

 

Assessment & recognition

Take a thorough history and perform a full ENT and neurological exam including cranial nerves and bedside hearing tests. All these patients will have signs and symptoms of AOM. The complications of AOM may have become rarer with the advent of antibiotics. A Cochrane review, however, found that antibiotic- and placebo-treated children had similar and very low rates of complications.  

Extracranial complications

  • Facial Palsy – AOM and a facial palsy without sparing of frontalis. Record the grade of palsy on the House-Brackmann scale, especially commenting on eye closure. This is usually due to a dehiscent facial nerve canal in the middle ear allowing the infection to affect the nerve itself. Patients usually recover well.
  • Bacterial labyrinthitis/vestibulitis – Vertigo (room spinning), nausea, vomiting and imbalance, increasing in intensity. There will be nystagmus and patients will be positive for both Romberg's and Unterberger's tests. Check for signs of meningitis.
  • Mastoiditis – Infection spreading from the middle ear to form an abscess in the mastoid air spaces of the temporal bone. There is sepsis with postauricular swelling that typically pushes the ear down and forwards. Mastoid tenderness is maximal when pushing backward at the top of the antihelix. Mastoid abscesses can spread superficially to form a subperiosteal abscess, inferiorly to the sternomastoid sheath (Bezold's abscess) and to the digastric fossa (Citelli's abscess), and superomedially to the petrous apex of the temporal bone (petrositis).
  • Petrositis – Infection spreading to the apex of the petrous temporal bone. There is sepsis and there are usually signs of mastoiditis. There is a triad of symptoms known as Gradenigo's Syndrome: otorrhoea, pain deep inside the ear and eye (cranial nerve V1 distribution) and ipsilateral lateral rectus palsy (cranial nerve VI).

Intracranial complications

  • Meningitis – Sepsis, headache, vomiting, neck rigidity, photophobia and positive Kernig’s sign (pain on meningeal stretch eg chin to chest or straight leg raise).
  • Sigmoid sinus thrombosis – Sepsis, swinging pyrexia and meningitis. If there is distal propagation of the clot then there is a palpable cord in the neck. If there is propagation of the clot to the cavernous sinus, then signs can include proptosis, ophthalmoplegia and chemosis. These patients frequently have another intracranial complication.
  • Brain abscess – Sepsis with neurological signs. Collections can occur extradurally, subdurally or intracerebrally. Prompt involvement of the neurosurgical team is important.

 

Immediate and overnight management

This depends on the presentation but the following would be appropriate in most cases.

 

Investigations

  • Microbiological swabs of any discharge and blood cultures before IV antibiotics
  • FBC, U&E, CRP, G&S
  • CT head/temporal bones may be required – timing of this depends on the presentation so discuss with the ENT and Radiology Registrars
  • LP if there are signs of meningitis – discuss this with the Medical or Paediatric Registrar

 

Treatment

  • Close neurological observation for meningitis and other signs eg eye signs 
  • 24 hour trial of broad spectrum IV antibiotics, according to local policy 
  • Combination antibiotic and steroid ear drops
  • Good analgesia
  • IV fluids if the patient is vomiting or dehydrated
  • Artificial tears and eye lubrication if there is facial palsy
  • Short term vestibular sedative eg prochlorperazine if there is dizziness/vertigo 
  • Keep nil by mouth if you are concerned the patient may need operative management: usually, operative management is reserved for patients who do not improve or worsen in the first 24 hours

 

Further management

  • Facial palsy – myringotomy +/- grommet insertion
  • Mastoiditis – cortical mastoidectomy, possible incision and drainage of spreading abscesses
  • Labyrinthitis – observe carefully for signs of meningitis
  • Meningitis – may need mastoidectomy at a later date
  • Sigmoid sinus thrombosis – neurosurgery to remove the infected clot, possibly anticoagulants
  • Brain abscess – neurosurgical management

 

Page last reviewed: 23 September 2016