Welch Allyn CP 150 spirometry option - User Manual - Manual (Page 65)

FEV1%. FEV1 as % of FVC. Same as FEV1/FVC. A parameter for a single FVC effort.
FEV1% formula. A user-selectable formula that determines the calculation method for a test’s (not an effort’s)
overall FEV1% value, which affects the automatic interpretation.
FEV2%. FEV2 as % of FVC.
FEV3%. FEV3 as % of FVC.
FEV5%. FEV5 as % of FVC.
FEV6%. FEV6 as % of FVC.
FEVt. Timed forced expiratory volume (in liters). Volume of air exhaled in the specified time during an
FVC effort.
FIF50. Forced inspiratory flow (in L/s) at 50% of FIVC.
FIV1. FIV1 as % of FIVC.
FIVC. Forced inspiratory vital capacity (in liters). The maximum volume of air that can be inspired during
forced inspiration starting from full expiration.
FIVt. Timed forced inspiratory volume (in liters). Volume of air inhaled in the specified time (t).
flow. The speed at which air is inhaled or exhaled (in L/s).
flow = f(v). See flow/volume.
flow/volume. Same as flow over volume or flow = f(V). A type of data curve available during FVC testing. The y
axis represents flow (L/s); the x axis represents volume (liters).
flow loop. A flow/volume curve that includes inspiratory data (negative values on the y axis).
FRC. Functional residual capacity (in liters). Volume of air remaining in the lungs and airway at the
average end-expiratory level.
FVC. Forced vital capacity. (1) A type of test in which patients inhale fully and exhale forcefully for as
long as they can. The goal: to measure the volume and flow of air. May or may not include forced
inhaling. When forced inhaling is included, it may be done either before or after exhaling. See
also flow loop. (2) An important parameter (in liters): the maximum volume of air that can be
delivered during forced expiration starting from full inspiration.
IC. Inspiratory capacity (in liters). The maximum volume of air that can be inhaled after a normal —
unforced — exhalation. See also tidal breathing.
incentive screen. An animated screen that gives patients — usually children — a goal to achieve while exhaling.
This screen is listed as a type of “curve” (data display) available during FVC testing.
IRV. Inspiratory reserve volume (in liters). The maximum volume that can be inspired from the average
end-inspiratory level. See also tidal breathing.
LLN. Lower limits of normal. The lowest expected value for a spirometric parameter. The method of
determining this value varies from norm to norm.
loop. See flow loop.
Directions for use Glossary 61