THE EFFECT OF DIFFERENT DOSE OF OXYGEN ON EXERCISE IN PATIENT WITH CHRONIC RESPIRATORY FAILURE

Abstract

We studied the effect of different doses of oxygen on walking in 14 patients with chronic respiratory failure. Setting up 4 stages for oxygen dose while subjects were walking, we compared each stage by measuring the SpO₂, the pulse rate and the ability to continue walking along the corridor. The standard, “the minimum dose of oxygen by which the SpO₂ maintains the stationary state for not less than 3 minutes and maintains not less than 90% SpO₂”, was considered adequate for the dose of oxygen on walking, because the rise in the pulse rate on walking was significantly lower than the previous stage and equal to the next stage. Increasing the dose of oxygen during walking was effective in raising the SpO₂ value, suppressing the rise in the pulse rate with walking, improving subjective symptoms and extending the walk.