Welch Allyn CP 200 Spirometry Option - User Manual - Manual (Page 61)

Directions for Use Appendix B Spirometry Protocols 57
Post results are compared (%c column) to the pre results only if the test-quality grades for
both pre- and post-test sessions are A, B, or C.
An ATS interpretation is displayed and printed only if the test session pre and post quality
grades are A, B, or C.
If the pre or post quality grades are D or F, interpretation states “results should be
interpreted with caution.”
If the pre or post quality grade is D and the results are within normal limits, the
interpretation states, “normal, but the reported FEV1 and FVC should not be used for
comparisons with previous or subsequent tests.”
Interpretation states “airway obstruction” when the FEV1/FEV6 is below the LLN.
Interpretation states “low vital capacity, perhaps due to restriction of lung volumes” if
FEV1/ FEV6 is above the LLN, but the FEV6 is below the LLN.
Note When PCP protocol is selected, no inspiration is recorded.