|
Table 6: Quality grades for FEV1 and FVC.1 |
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|
Grade |
Acceptable manoeuvres |
ΔFEV1 and ΔFVC, mL |
Commentary |
|
|
Over 6 years old |
Under 6 years of age |
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|
A |
3 |
< 150 |
< 100 |
Technically highly reliable |
|
B |
2 |
< 150 |
< 100 |
Technically reliable |
|
C |
2 |
< 200 |
< 150 |
Technically acceptable |
|
D |
2 |
< 250 |
< 200 |
Technically with reserve |
|
E |
2 o 1 |
> 250 |
> 200 |
Technically not recommended |
|
U |
0 acceptable and 1 useful |
N/A |
N/A |
Rating recommended only for expert assessor |
|
F |
0 or 1 |
N/A |
N/A |
Technically not recommended |
|
FEV1 = forced expiratory volume in the first second. FVC = forced vital capacity. N/A = not applicable. |
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