Welch Allyn CardioPerfect Workstation SpiroPerfect Module - User Manual - Manual (Page 72)

CardioPerfect Workstation
SpiroPerfect Module
– User Manual
DIR 80012334 Ver. F 72 / 95
12.8 Acceptability of an effort
(See section 12.11 references 2, 5, and 8 for details of the ATS standards.)
An individual effort is deemed acceptable by the SpiroPerfect software when:
The effort has a good start:
 extrapolated volume <5% of FVC or 150 mL, whichever is greater.
If this criterion is not met, the effort-quality message "Don't hesitate" or "Blast out faster"
displays.
The effort exhibits satisfactory exhalation:
 duration ≥ 6 seconds (≥ 3 seconds for children under 10 years of age), OR
 a 1 second plateau in the volume-time curve occurs
If this criterion is not met, then the effort-quality message "Blow out longer, No plateau"
displays.
(See the "Effort-Quality Message" table below for further detail.)
Effort-Quality Message Criteria
Don’t hesitate Back Extrapolated Volume (BEV) is > 150 mL
Blast out faster PEF time > 120 ms.
Blow out longer, No plateau FET < 6 seconds (3 pediatrics) and no plateau
Good effort
FET < 6 seconds (3 pediatrics) and has plateau
OR
FET is > 6 seconds (3 seconds pediatrics)
In addition, the clinician administering the test should assess the effort for signs of:
 cough during the initial second
 glottis closure
 early termination
 effort that is not maximal throughout
 leak
 obstructed mouthpiece
Refer to the effort acceptability poster that shipped with your product for examples of efforts
that are acceptable. The poster also contains examples of inaccurate results. Delete any
efforts exhibiting signs of inaccurate results. (See section 8.4 Deleting an Effort on page 46.)
The poster is also accessible in the Help menu. Go to Help>Spirometry>Acceptability
Poster.
12.9 Reproducibility of a test stage
Within a test stage, (i.e. either Pre or Post medication), an assessment will be made of the
acceptability and reproducibility of the overall test stage. The test stage will be deemed by the
software to be acceptable if:
 there are at least 3 acceptable efforts
and reproducible if:
 within the 3 acceptable efforts, the best two FVC measurements and the best two
FEV1 measurements are within 150 mL