INTERPRETATION OF RESULTS
The PneumoCheck Printer/Charger will place a star beside values
which are abnormal,
If the FEVl/FVC ratio is abnormally low, an
obstructive disorder is indicated. Use the FEVl to grade the severity
of the obstruction:
l
An FEVI above 80% of predicted indicates a
Borderline Obstruction.
l
An FEV1 between 60% and 80% of predicted indicates a
Mild Obstruction.
l
An FEVl between 40% and 60% of predicted indicates a
Moderate Obstruction.
l
An FEVl below 40% of predicted indicates a
Severe Obstruction.
l
If the FEVl is below 80% of predicted and the FVC is also
below 80% of predicted, the possibility of a superimposed
Restriction in addition to the Obstruction exists.
If
the FEVl/FVC ratio is normal, but the FVC is abnormal, a re-
strictive disorder is indicated, and the FVC is used to grade the
severity of the restriction:
l
An FVC between 60% of predicted and the lower limit of
normal indicates a
Mild Restriction.
l
An FVC between 50% and 60% of predicted indicates a
Moderate Restriction.
l
An FVC below 50% of predicted indicates a
Severe Restriction.
Any patient who has a normal FVC, FEVl/FVC, and FEF 2575% is
considered to be within normal limits, and clinically significant
obstructive lung disease can be ruled out. An exception to this is the
asymptomatic asthmatic who is in remission.
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