Welch Allyn CP 200, Directions For Use Manual

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72 Appendix D Predictive Norms, etc. Welch Allyn CP 200 Spirometry Option
About Quality Feedback
The spirometer provides two kinds of quality feedback: effort-quality messages and test-
quality grades, as described in the following sections.
About Effort-Quality Messages
One of the following effort-quality messages appears on the screen after each effort is
completed. These messages indicate whether an effort was acceptable and reproducible,
and if not, what the patient needs to do differently.
For an example of the “effort complete” screen where these messages would appear,
see
Figure 29 on page 42.
The term “match” here means “variation” or “difference with respect to best test.”
Effort-Quality
Message Criteria
Don’t hesitate Back-extrapolated volume > 150 mL or 5%, whichever is greater.
Blast out faster PEF time > 120 ms.
Blow out longer FET < 6.0 seconds, and end-of-test volume > 100 mL (invalid FEV6).
Blast out harder PEF is not reproducible (match > 1.0 L/s).
Deeper breath FEV6 match > 150 mL FVC may be substituted for FEV6.
Good effort Effort meets above criteria.
Good test session Two acceptable efforts match.