100% Oxygen at normal pressure is an alternative

doi:10.1136/bmj.309.6947.124a

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J F Nunn

Northwood, Middlesex HA6 2LJ.

EDITOR,—Two aspects of the management of patients who refuse blood transfusion deserve emphasis.1 The first point concerns the administration of 100% oxygen at normal pressure. When a patient is breathing air the concentration of oxygen in solution in arterial blood is only about 3 ml/l. This compares with a concentration …