About effort, Quality messages, About quality feedback – Welch Allyn CP 200 Spirometry Option - User Manual User Manual
Page 76: About effort-quality messages

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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
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.