Task: Answer Verification
Input (English): Question: Do quantitative 15 steps exercise oximetry as a marker of disease severity in patients with chronic obstructive pulmonary disease?
Answer: In patients with severe COPD, arterial hypoxemia during exercise can be assessed by simple 15 steps oximetry. This method can serve both as a marker for disease severity and to determine the need for oxygen supplementation.
Output (English): yes