Serial arterial P(O2) values were obtained following discontinuation of supplemental inspiratory oxygen by face mask, in 21 patients suffering from a variety of cardiac diseases. All patients were free of pulmonary disease. Arterial P(O2) values returned to baseline within 7 min after supplemental oxygen was withdrawn. Decay rate constants calculated from the arterial P(O2) measurements were unaffected by cardiac index or the level of pulmonary capillary wedge pressure. It is concluded that in patients free of overt pulmonary disease, arterial P(O2) measured 5 to 7 min after withdrawal of supplemental inspiratory oxygen accurately reflects an individual patient's baseline arterial P(O2) value.
ASJC Scopus subject areas
- Pulmonary and Respiratory Medicine
- Critical Care and Intensive Care Medicine
- Cardiology and Cardiovascular Medicine