PCIRV--a mode of ventilation associated with problems.

Communications to the Editor tolmetric analysis) is elevated. Severe methemoglobinemia is rapidly reversed by intravenous administration (If the reducing agent methylene blue (1-2 mg/kg in a 1 percent solution administered over 5 min).23 Because of the urgency (If treating severe methemoglobinemia, particularly in patients who have underlying lung disease, bronchocopists are well advised to maintain a stock of methylene blue in the bronchoscopy suite.