Quality Messages And Quality Grades; Quality Messages - NDD EasyOne Operator's Manual

EasyGuide

10 Quality Messages and Quality Grades

10.1 Quality Messages

The quality messages assist you in conducting the measurement. After each test, they provide informa-
tion as to whether the test is acceptable or what to do to improve the result.
Message
Don t hesitate
Blast out faster
Blow out longer
Good effort, do next
Blast out harder (only in
Frontline mode)
Wait until buzz before
blowing out
Cough detected.
Try again
Deeper breath
Test complete
* when using FEV6 instead of FVC, FEV6 is also used for the determination of the quality message
Criterion
Back-extrapolated volume greater than 150
ml or 5% of FVC whichever is greater (for
age <= 6: 80ml or 12.5% of FVC whichever
is greater)
Time until peak flow greater than 120 ms
Expiration time less than 2 seconds or vo-
lume during last 0.5 seconds >40 ml when
expiration time is <6 seconds
Test meets above criteria
Peak flow not reproducible. Difference with
respect to best test greater than 1.0 l/s
The time to peak flow (PEFT) is less than
25ms
A cough has been detected
FEV1 or FVC* not reproducible. Difference
with respect to best test greater than 150
ml or 100ml if FVC is < 1.0L. (for age <= 6:
100ml or 10% of FEV1 or FVC* whichever is
greater)
QC grade A or B reached. After 5 trials loo-
sened to include QC grade C. See QC grade
documentation.
Recommended action
The patient must exhale all air at once and not
exhale in short bursts.
The patient must exhale more explosively and as
firmly and quickly as possible.
The patient stopped exhaling too early. The pa-
tient must exhale still further and force as much
air as possible out of his or her lungs.
Good test. Only one to two more good tests and
the test is complete.
The test differs greatly from previous best test.
The patient can blow even more firmly and
achieve a higher peak flow.
Instruct the patient to wait until the baseline
setting is finished and the device signals that the
trial can start
Instruct the patient to avoid coughing during the
first second.
The test differs greatly from previous tests. The
patient can inhale even more deeply and exhale
even more air.
The test is complete. An adequate number of
good tests is available.
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