Pharmacology Nitrous oxide Is contraindicated In patients with pneu-mothorax, pneumopericardium or Intestinal obstruction because it: A Depresses an already compromised myocardium B Permits the Use of limited FIO2 only C Is less soluble than nitrogen D Causes the expansion of air filled body cavities 💡 Explanation Nitrous oxide Is contraindicated In patients with pneu-mothorax, pneumopericardium or Intestinal obstruction because it: ✓ Correct Answer: D. Causes the expansion of air filled body cavities