Quality Messages and Quality Grades
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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
following published standards:
[1]
Standardization of Spirometry. 1994 Update, Am J Respir Crit Care
Med, Vol 152.
[2]
Office Spirometry for Lung Health Assessment in Adults: A
Consensus Statement from the National Lung Health Education
Program. Respir Care, 2000, Vol 45, No 5.
[3]
ATS/ERS Task Force: Standardization of Lung Function Testing. Eur
Respir J 2005; 26.
[4]
An Official American Thoracic Society/European Respiratory Society
Statement: Pulmonary Function Testing in Preschool Children. Am J
Respir Crit Care Med, 2007, Vol 175.
The quality grading is based on [2], [3] and [4].
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:
