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Quality Messages and Quality Grades
84 EasyOne Pro™ / EasyOne Pro™ LAB
5 Quality Messages and Quality Grades
5.1 FVC/FVL Quality Messages and Quality Grades
Some Basic Facts
End-of-Test criteria, quality criteria and quality grading are based upon the
published standards [1], [4], [11], [15] (
"Literature" on page 182).
Quality grading is based on [4], [11], [15] ( "Literature" on page 182).
Additional remarks

The main articles [2] and [3] do not numerically define the minimum
expiratory peak flow time (PEFT) that is required for an acceptable test. In
this case, 160 ms is used.

The end-of-test criteria for FVC tests are as follows: A test ends when the
volume change during the last 2 seconds is <45 ml, or an inspiratory
volume >150 ml is detected. This end-of-test criterion slightly differs from
the published criterion in [3] which is 25 ml in the last second. Reason:
When the 25 ml in 1 second criterion is applied to the 24 waveforms also
defined in [1] and [2], several curves will end too early, and these tests
might fail. We therefore decided to slightly change the criterion to 45 ml
in 2 seconds.

In the following tables the quality messages and the quality criteria are
detailed.
The end-of-test criterion for an FVC test is as follows: A test ends when the
volume change during the last 2 seconds is <45 ml, or an inspiratory volume
>150 ml is detected. When this end-of-test criterion is met, the following
quality messages are checked: