Welch Allyn PneumoCheck Operating Instructions Manual page 20

Match Criteria
FVC
The previously stored best maneuver and the new maneuver are
compared:
MATCH will be displayed if both FVC values are within 5% of
l
each other and both FEVl values are within 5% of each other.
If both FVC values and both FEVl values are not within 5% of
each other:
NO MATCH will be displayed if the new maneuver is
l
5% less than the previously stored BEST.
NEW BEST will be displayed if the new maneuver is 5%
l
greater than the previously stored BEST.
MVV
MATCH will be displayed if the MVV values of the two tests
l
being compared are within 15% of each other.
NO MATCH will be displayed if the MVV values compared are
l
not within 15% of each other.
Remember that results displayed at the completion of the
maneuver are for the maneuver just completed. See p.14 for
instructions on accessing BEST and LAST tests.
NOTE:
Turn the ON/OFF switch to OFF and back to ON before
beginning a test on a new patient, so that the previous patient data
memory is cleared.
16