Welch Allyn CP 200 Spirometry Option - User Manual User Manual
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Chapter 2 Reviewing the Spirometry Settings
Welch Allyn CP 200 Spirometry Option
Select FVC
Reversibility Formula
Reversibility is the percentage difference between pre-test and post-test data for FVC
testing. This measurement indicates the effect of medication on lung function. Reversibility
applies to each parameter separately.
To determine the way in which reversibility is calculated, choose from these options:
•
((Post-Pre)/Pre)*100
•
(Post/Pre)*100
•
((Post-Pre)/Predictive)*100
Select FEV1%
Formula
The FEV1% formula determines the calculation method for a test’s (not an effort’s) overall
FEV1% value, which affects the automatic interpretation. The variable part of this formula
is the denominator. Both the numerator and the denominator represent best effort values.
To determine the way in which FEV1% is calculated, choose from these options:
•
FVC
(FEV1% = FEV1/FVC)
•
FIVC
(FEV1% = FEV1/FIVC)
•
FEV6
(FEV1% = FEV1/FEV6)
•
Max (FVC, FIVC, SVC)
(FEV1% = FEV1/FVC or FIVC or SVC, whichever is largest)
Enable Predictive
Points
Yes or no. If yes, predictive points display and print. Predictive points may be enabled with
or without the predictive curve. For details, see
Enable Predictive
Curve
Yes or no. If yes, a curve displays and prints along the predictive points. When the curve is
enabled, the points are automatically also enabled.
Enable ATS Interp.
Results
Yes or no. If yes, ATS interpretative results are included in the test record. For details, see
Enable Composite
Norm Values
Yes or no. If yes, any parameters that are not supported in the primary (selected) norm are
given predictive values from alternative (composite) norm sources.
If set to no, only the primary norm’s values are used, no composite values. On the screen
and in reports, any unsupported parameters appear without predictive values.
For details, see
Setting
Description (continued)