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The Oximeter-Controlled Induced Anoxemia Test

1958; American Medical Association; Volume: 101; Issue: 4 Linguagem: Inglês

10.1001/archinte.1958.00260160071010

2375-6799

Raymond Penneys,

Cardiovascular and exercise physiology

Introduction The observation that the inhalation of a gas of low oxygen content may bring on angina pectoris, or specific electrocardiographic changes, has led to the induced anoxemia (hypoxemia) test for the study of coronary artery disease.* The type of anoxemia test most widely used is that of Levy and co-workers, in which a gas of fixed low oxygen concentration, 10%, is administered for a period up to 20 minutes. 2 In two previous papers, with Dr. Caroline Thomas, we described another type of test, the oximeter-controlled anoxemia test, 3,4 in which the content of oxygen in the respired gas is varied to produce the desired degree of anoxemia, measured continuously by the oximeter. 5 This overcomes the large variability in the oxygen saturation of the arterial blood known to result from the inhalation of 10% oxygen and other gas mixtures of fixed oxygen concentration. 3,4,6-8 In subsequent papers, with