Interpret exertional SpO2 desaturation during 6MWT. Nadir SpO2 <88% indicates significant desaturation requiring supplemental oxygen prescription.
Significant desaturation during the six-minute walk is defined as a fall in SpO₂ of ≥4% from the resting baseline, or an absolute SpO₂ below 90% at any point. This threshold is used in the ATS 6MWT guidance and in COPD exercise-desaturation studies.
A significant drop suggests exercise-induced hypoxemia and may warrant assessment for ambulatory supplemental oxygen, pulmonary rehabilitation, or further workup for the cause of exertional desaturation. Interpret the result alongside symptoms, walk distance, and the full clinical picture — the 6MWT is a screening tool, not a diagnosis.
Enter the values for the scenario you are assessing. Interpret exertional SpO2 desaturation during 6MWT. Nadir SpO2 <88% indicates significant desaturation requiring supplemental oxygen prescription. Use the 6mwt desaturation result to inform your calculation.