Welch Allyn CP 150 spirometry option - User Manual - Manual (Page 67)

test. A set of efforts — up to 6 efforts of each type (FVC and SVC) for a maximum of 12 efforts (6 FVC
and 6 SVC). The 6 efforts of a given type can be a mixture of pre-medication and post-medication
efforts.
Tex. Tidal breathing expiration time (in seconds). See also tidal breathing.
tidal breathing. Multiple breaths, normal breathing. May be used during FVC or SVC testing. After measuring tidal
breathing for several seconds, the following parameters can be extrapolated: MV, VE, BF, and
Tin/Tex. If you combine a VT measurement with a VC measurement, you can also calculate the
ERV, IC, and IRV. For example, COPD patients have a higher ERV and a lower IC and IRV.
tidal volume. See VT.
tidal volume curve. A flow loop that includes all data from all breaths, tidal and forced.
Tin. Tidal breathing inspiration time (in seconds). See also tidal breathing.
Tin/Tex. The ratio of Tin and Tex. See also Tin and Tex.
TV. See VT.
variance. The difference between the best and worst efforts for a parameter (FEV1, FVC, and so on).
Pre¬test and post-test variances are reported separately. See also best effort.
VC. Vital capacity. See FVC or SVC.
VE. Ventilation in L/min. See also tidal breathing.
vital capacity. See FVC or SVC.
volume = f(t). See volume/time.
volume/time. Same as volume over time or volume = f(t). A type of data curve available during both FVC and
SVC testing. The y axis represents liters; the x axis represents seconds.
VT. Tidal volume (in liters). Also called TV, although VT is the preferred abbreviation. The volume of
air that enters the lungs during inspiration and leaves the lungs during expiration in a normal
breathing cycle. One of the most important parameters in SVC testing. See also MV, tidal
breathing, and tidal volume curve.
workstation. See CardioPerfect workstation.
Directions for use Glossary 63