SDI Astra 300, User Manual, Page: 43 / 106

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43
Chapter 2: Astra 300 Functional Operation
The Spirometry Source
FVC > LLN
Bronchodilation
Test
Possibly Restrictive
Further Testing
Required
Severity according to
% Pred FEV
1
Obstructive
Normal
Significant Response
FEV
1
and/or FVC
>
12% of baseline
and
>
200 mL
No Interpretation
Yes
Yes
No
No
FEV1/FVC > LLN
Yes
No
“
Mild” % Pred FEV
1
>
70
“Moderate” % Pred FEV
1
< 70 and
>
60
“Moderately Severe” % Pred FEV
1
< 60 and
>
50
“Severe” % Pred FEV
1
< 50 and
>
34
“Very Severe” % Pred FEV
1
< 34
LLN: Lower Limit of Normal
T T
T
T
T
T
T
T
T