Spirometers should measure how many 8L
volume or more
Volume accuracy should be +/- 2.5% OR +/-0.05 L in 3L syringe
Flow mesurements should be accurate within +/- 5% of true value
How many efforts to test accuracy 3
acceptable pt maneuvers free fom artifact coughing, early termination, not max effort
test accuracy for at least 6 seconds
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