Welch Allyn CP 150 spirometry option - User Manual - Manual (Page 66)

lung age. A calculated value based on a patient’s demographics and spirometric performance that gives a
relative indication of the health of the subject's lungs. This value is used primarily to encourage
smoking cessation. Lung age is not available for patients under 20 years of age.
maneuver. See effort.
MV. Minute volume (in liters). MV = BF x VT. See also tidal breathing.
NIOSH. National Institute for Occupational Safety and Health (U.S.).
norm. A research-based spirometry data set with a specific profile for race, gender, age, and height. The
software compares each patient’s results with data in the primary (selected) norm, reporting the
results as percentages of the predicted (normal) values.
normal. Consistent with norm data.
OSHA. Occupational Safety & Health Administration (U.S.).
parameter. A commonly defined attribute of a spirometric waveform (FVC, FEV1, and so on).
pediatric.
Generally, under 18 years old. Age limits vary with each norm. Also, young children’s lung sizes
vary greatly. Norm values and interpretive results are not available for patients under 3 years of
age.
PEF. Peak expiratory flow (in L/s). The largest expiratory flow achieved with a forced effort.
PIF. Peak inspiratory flow (in L/s). The largest inspiratory flow achieved with a forced effort.
post-test. A test that provides data to compare with pre-test data. Sometimes called post-Rx or post-BD
(bronchodilator). A post-test must follow a pre-test within 24 hours. See also reversibility.
predictive curve. A curve that follows a set of predictive points.
predictive points. Key values from the selected norm and from composite norms (if enabled). Applicable for FVC
tests only. For flow/volume curves, predictive values are PEF, FEF25, FEF50, FEF75, and FVC (all
represented as points). For volume/time curves, predictive values are FEV1 (represented as a
point) and FVC (represented as a horizontal line). If predictive points are enabled, all available
predictive values appear on the screen and the printout.
pre-test.
A test that provides a baseline for comparison with a post-test taken by the same patient.
Sometimes called pre-Rx or pre-BD (bronchodilator). Pre-tests and post-tests are commonly used
to evaluate the effectiveness of medication. See also reversibility.
reversibility. The percentage difference between pre-test and post-test data. This measurement indicates the
effect of medication on lung function. Reversibility applies to each parameter separately. The
reversibility formula, which determines the way in which reversibility is calculated, is user-
selectable.
SVC.
Slow (relaxed) vital capacity. (1) A type of test in which patients breathe normally several times,
then inhale maximally and exhale maximally, or vice versa. Sometimes SVC testing is used when
forced breathing is impossible. The patient inhales and exhales as completely as possible, as in
FVC testing, but the breathing is not forced. The goal of an SVC effort is to measure the volume of
air inhaled and exhaled, not the air flow (speed). (2) An important parameter (in liters): the
maximum volume of air exhaled from the point of maximum inhalation, or maximum volume of air
inhaled from a point of maximum exhalation.
62 Glossary CP 150 spirometry option