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Related Experiment Videos

Nimodipine-induced acute hypoxemia: case report.

J W Devlin1, W M Coplin, K R Murry

  • 1Department of Pharmacy, Wayne State University, Detroit Receiving Hospital, Michigan 48201, USA. jdevlin@dmc.org

Neurosurgery
|November 4, 2000
PubMed
Summary
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Nimodipine, used for subarachnoid hemorrhage, can cause severe hypoxemia in patients with adult respiratory distress syndrome. This case highlights the need for careful oxygenation monitoring during nimodipine treatment.

Area of Science:

  • Neurology
  • Critical Care Medicine
  • Pharmacology

Background:

  • Nimodipine is a calcium channel blocker frequently used to improve neurological outcomes following subarachnoid hemorrhage.
  • While known for cerebral specificity, nimodipine can cause systemic adverse effects, including hypotension.
  • This report details a novel, severe adverse reaction to nimodipine.

Observation:

  • A patient with traumatic subarachnoid hemorrhage experienced two episodes of life-threatening hypoxemia.
  • These episodes were temporally linked to single doses of nimodipine administration.
  • No other causes could explain the severe drops in oxygen levels.

Findings:

  • Acute hypoxemia occurred with partial pressures of oxygen as low as 32.9 mm Hg.
  • Supportive oxygen therapy (100% inspired oxygen and positive end-expiratory pressure) resolved hypoxemia within 40 minutes.

Related Experiment Videos

  • Nimodipine discontinuation preceded resolution of hypoxemia.

    • Implications:

    • Nimodipine may exacerbate ventilation/perfusion mismatch in patients with adult respiratory distress syndrome via pulmonary artery vasodilation.
    • The drug might interfere with hypoxic pulmonary vasoconstriction, impairing oxygenation.
    • Close monitoring of oxygenation is crucial when initiating nimodipine therapy, especially in critically ill patients.