Epistemis

Biot's Breath

Specialty: Respiratory.

  • ataxic breathing
  • breathing in bursts of apnea and irregular hypernea

Why it occurs

  • Destructive or ischemic lesions of the pons or medulla oblongata (direct damage to the pneumotaxic center that coordinates respiratory rhythmicity)
  • Decompensated intracranial hypertension with impending tonsillar herniation (mechanical compression of the brainstem nuclei)
  • Severe bacterial meningitis or meningoencephalitis (inflammation of the basal subarachnoid space with vascular or trunk parenchyma involvement)
  • Massive and potentially lethal intoxication by central nervous system depressants (barbiturates, benzodiazepines or industrial alcohol)
  • Brain trauma with skull base fracture and diffuse axonal damage in the brainstem

Initial workup

Urgent computed tomography (CT) or magnetic resonance imaging (MRI) of the brain; Lumbar puncture (after ruling out massive intracranial hypertension by CT) for cerebrospinal fluid analysis; Continuous intracranial pressure (ICP) monitoring; Arterial blood gases and urgent metabolic panel.

red flags

Completely irregular breathing with imprecise periods of apnea followed by few breaths of variable depth, deep stupor or coma, non-reactive pupils or anisocoria, severe hemodynamic instability, or imminent respiratory arrest.

Standard management

  • Mannitol 20% — intravenous infusion of 0.5-1 g/kg over 20-30 minutes if massive cerebral edema and intracranial hypertension are suspected
  • 3% hypertonic saline solution — alternative to mannitol for ICP control, administered centrally
  • Ceftriaxone — 2 g intravenously every 12 hours empirically if a meningeal infectious origin is suspected
  • Dexamethasone (10 mg intravenous initially followed by 4 mg every 6 hours if there is peritumoral edema).

Educational guidance for study. It is NOT a prescription recommendation. The actual choice depends on the cause, the patient, and current guidelines.

Area
Respiratory
Listed causes
5
Treatment options
4
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