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Chapter 2: Astra 300 Functional Operation
The Spirometry Source
•The new curve is superimposed to compare it with the
best (M1/ dotted line) of those saved.
•As many maneuvers as required can be carried out. The
ASTRA300 will always save the five best FVC and VC
values and the three best values for MVV, according to
ATS/ERS criteria
•Different regulations recommend at least three
satisfactory maneuvers in which the repeatability criterion
is satisfied, but no more than eight efforts performed.
•The last maneuver entered remains flashing and
corresponds to the continual line graph. When more than
five maneuvers have been entered and none are flashing,
this indicates that the last maneuver entered is worse
than the five saved and will be deleted.
•If three or more maneuvers have been completed and
the FVC and/or FEV1 signs are flashing, this indicates
that the repeatability criteria for one or both parameters
has been met, according to the ATS/ERS. This criterion
indicates that the best two observed values of FVC and
the best two of FEV1 differ by no more than 150 ml if the
FVC is greater than 1 liter or no more than 100 ml if the
FVC is below or equal to one liter.
NOTE: Remember that by using the back key
it
is possible to go backward in the menu without
losing the information available to date, unless you
enter a new patient by entering a new code or at
another time.
(*) ATS/ERS criteria:
The maneuver with least warnings is considered
the best (ET, EX). With the same number of
warnings, the maneuver with the highest sum of
FVC+FEV1 is considered the best.