AT-2plus User Guide Spirometry Supplement Page 26
AT-2plus Spirometry Supplement Page 26
Diagnosis
The diagnostic interpretation is dependent upon the country. The factors used in the evaluation for diagnosis are automatically included
in the respective language software and described in the following chapters.
Diagnosis Setting `International`
Note: When ‚International‚ is set, diagnostic norms are predicted using the VC value (if taken). If VC values are not recorded, FVC is
used. That is:
%VC = 100 * VC/VC predicted (when VC measurement taken), otherwise 100 * FVC/FVC predicted
FEV% = 100 * FEV1/VC (when VC measurement taken), otherwise 100 * FEV1/FVC
Possible respiratory problems are diagnosed on evaluation of the following factors:
Diagnosis
%FVC
(%SVC)
FEV1%
Normal Condition >80% >70%
Restrictive <80% -
Obstructive - <70%
Combined <80% <70%
The measurement FEV1/FVC or FEV1/VC will adapted on the screen and on the printout .
Diagnosis
The diagnostic interpretation is dependent upon the country. The factors used in the evaluation for diagnosis are automatically included
in the respective language software and described in the following chapters.
Diagnosis Setting `International`
Note: When ‚International‚ is set, diagnostic norms are predicted using the VC value (if taken). If VC values are not recorded, FVC is
used. That is:
%VC = 100 * VC/VC predicted (when VC measurement taken), otherwise 100 * FVC/FVC predicted
FEV% = 100 * FEV1/VC (when VC measurement taken), otherwise 100 * FEV1/FVC
Possible respiratory problems are diagnosed on evaluation of the following factors:
Diagnosis
%FVC
(%SVC)
FEV1%
Normal Condition >80% >70%
Restrictive <80% -
Obstructive - <70%
Combined <80% <70%
The measurement FEV1/FVC or FEV1/VC will adapted on the screen and on the printout .
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