CareFusion Micro I Manual de Instruções Página 28

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NLHEP Quality Checks
In order for the interpretation to be displayed a manoeuvre must
pass a set of enhanced quality checks. After the patient has
performed a poor quality manoeuvre, one of the three following
messages will appear:
Message
Criteria Recommended action
Don’t
hesitate
Back-extrapolated volume
(BEV) greater than 150 ml
The patient should blast
out the air more quickly
and evenly and without
hesitation at the beginning
of the manoeuvre
Blast out
faster
Time until peak flow (PEFT)
greater than 120 msec
The patient must exhale
more explosively at the
beginning of the
manoeuvre
Blow out
longer
Expiration time less than 6
seconds or volume
accumulation has not
dropped below 100 ml per
0.5 seconds
The patient stopped
exhaling too early. The
patient must exhale until
their lungs are completely
empty.
Once an acceptable manoeuvre has been performed, the following
consistency checks will also be applied to subsequent manoeuvres
Blast out
harder
Peak flow not reproducible.
The best previous
manoeuvres do not match
within 1.0 L/sec indicating
that the patient is giving
an inconsistent effort.
The patient must give
their maximum effort for
each manoeuvre
Deeper
breath
FEV1 or FEV6 not
reproducible. Difference
with respect to best test
greater than 150 ml
The patient must inhale
until their lungs are
completely full before
each manoeuvre
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