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Chapter 2: Astra 300 Functional Operation
The Spirometry Source
FVC < 35% Very Intense
If FEV1/FVC% < FEV1/FVC% Reference
and FVC > 80% of the FVC Reference
Mixed ventilatory disturbance is suspected
If FEV1/FVC% < FEV1/FVC% Reference
and FEV1 > 80% of the FEV1 Reference
Mixed ventilatory disturbance is suspected
If the POST bronchodilation test is carried out and the
FEV1 POST degree of reversibility exceeds the base FEV1
or PRE by 15%, this is considered a positive response
to the bronchodilator
QC GRADES
Quality Control grades will be assigned according to the
following guideline
A = At least 2 acceptable maneuvers with the largest
two FEV1 values matching within 100 mL and the largest
2 FEV6 values matching better than 100 mL
B = At least 2 acceptable maneuvers with FEV1 values
matching matching between 101 and 150 mL
C = At least 2 acceptable maneuvers with FEV1 values
matching between 151 and 200 mL
D = Only one acceptable maneuver, or more than one,
but the FEV1 values match >200mL (no interpretation)
F= No acceptable maneuvers (no interpretation)