Spirometry Quality Assurance: Common Errors and Their ...

2012 NIOSH Spirometry Quality Assurance: Common Errors and Their Impact on Test Results 8 2012 NIOSH Spirometry Quality Assurance: Common Errors and Their Impact on Test Results 9 A valid test has at least 3 acceptable trials and both the FVC and FEV 1 are repeatable [i.e., the two highest values from acceptable maneuvers are within 0.15 L (150 ...

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