Pentobarbital Induced Hypokalemia: A Worrying Sequela

Area of Science:

• Neuroscience
• Critical Care Medicine
• Pharmacology

Background:

• Intracranial hypertension unresponsive to other therapies may necessitate barbiturate-induced coma.
• This treatment, while effective, carries risks including refractory hypokalemia and rebound hyperkalemia.

Observation:

• A case report details a patient experiencing hypokalemia during pentobarbital-induced coma for elevated intracranial pressure.
• The patient was managed conservatively to prevent rebound hyperkalemia.

Findings:

• Conservative management, termed permissive hypokalemia, was successfully employed.
• This involved a lower potassium replacement target threshold, avoiding dangerous hyperkalemia.

Implications:

• Clinicians must understand barbiturate coma's adverse effects, particularly potassium fluctuations.
• Permissive hypokalemia offers a viable strategy to balance hypokalemia and prevent rebound hyperkalemia.