Methemoglobinemia

Etiology

  • Hemoglobin changed to met-hgb form, which cant bind O2

Risk Factors

  • Often from meds like dapsone, benzocaine spray

Symptoms

  • Progressive sob
  • Confusion
  • Acidosis and target organ dysfxn→ more severe w/higher levels met-hgb

Physical Exam Findings

  • Tachypnea
  • Tachycardia
  • O2 sat 85%
  • Clear lungs
  • Cyanosis