Nlhep Quality Checks - Vyaire Micro I Manual De Funcionamiento

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
Don't Back-extrapolated volume
hesitate (BEV) greater than
150 mL
Blast out Time until peak flow
faster (PEFT) greater than
120 msec
Blow out Expiration time less than 6
longer seconds or volume
accumulation has not
dropped below 100 mL per
0.5 seconds
Once an acceptable manoeuvre has been performed, the following
consistency checks will also be applied to subsequent manoeuvres
Blast out Peak flow not
harder reproducible. The best
previous manoeuvres do
not match within 1.0 L/sec
indicating that the patient
is giving an inconsistent
effort.
Deeper FEV1 or FEV6 not
breath reproducible. Difference
with respect to best test
greater than 150 mL
Criteria
69
Recommended action
The patient should blast
out the air more quickly
and evenly and without
hesitation at the beginning
of the manoeuvre
The patient must exhale
more explosively at
the beginning of the
manoeuvre
The patient stopped
exhaling too early. The
patient must exhale until
their lungs are completely
empty.
The patient must give their
maximum effort for each
manoeuvre
The patient must inhale
until their lungs are
completely full before each
manoeuvre