1) Is this the best definition?
2) Is a drop in O2 from 90% to 86% a 4% desaturation or is it a 3.6% desaturation?
For a sleep lab it's 4%. We don't have equipment that sensitive. Really only arterial blood gas is accurate in getting SPo2 values, but a needle plunged into the arm would FOR SURE wake people up.
3) How is a 30% drop in flow rate identified?
Nadir to nadir for length of the event, and a 30% decrease in the airflow sin wave that is measured in microvolts. Sounds complicated maybe...but it's not.
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