Product Manual
Glossary
adult.
Generally, 18 or older. Age limits vary with each norm.
ATS.
American Thoracic Society. An organization that provides standards for spirometry common
practice and equipment.
ATS acceptability
criteria.
Applicable to FVC testing only. (1) Criteria ensuring that an individual effort started and ended
satisfactorily (no leaks or coughs). (2) Criteria ensuring that the patient has made at least two
efforts of the same kind (two FVC-pre or two FVC-post), and that these efforts are reproducible.
For details, see document Standardisation of Spirometry, 2005 Update, ATS/ERS task force:
This document describes the methods of acquiring the output parameters and the required
accuracy. For details on ATS/ERS acceptability criteria, see these sections in the standard:
• “Start of Test Criteria,” page 324
• “Manoeuvre repeatability,“ page 325
ATS interpretive
results.
The software generates interpretive results as described in Lung Function Testing: Selection of
Reference Values and Interpretive Results, American Thoracic Society, March 1991.
This document describes the methods of selecting the reference values and the algorithm for
interpretative results.
baseline.
See pre-test.
best effort.
A measurement calculated from a set of efforts. The formula for calculating best effort is
userselectable: (1) the single best effort or (2) a composite of best parameter values.
BF.
Breathing frequency. See also MV and tidal breathing.
bronchospasm
evaluation.
See post-test.
BTPS.
Body conditions, normal body temperature (37° C), ambient pressure, saturated with water vapor.
The BTPS correction factor converts ambient conditions — temperature, humidity, and pressure
— to BTPS.
CardioPerfect
workstation.
A PC using Welch Allyn CardioPerfect software. Stores ECG and spirometry test data. Can
communicate with other electronic patient-information systems, such as billing and medical
records.
composite norm
value.
A value that is filled in from another norm — a “composite norm source” — when the primary
(selected) norm does not support a given parameter. Applicable only when composite norm values
are enabled.
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