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SP-2 User Guide
Art. No. 71022-0000 Welch Allyn Schiller ©2000
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Explanation of Measured Values
ERV
Expiratory Reserve Volume.
Possible further expiration starting from the normal expiration level.
IRV
Inspiratory Reserve Volume.
Possible further inspiration starting from the normal inspiration level.
TV
Tidal Volume.
Expirational and inspirational volumes during normal respiration.
SVC
Slow Vital Capacity.
Lung volume measured from a complete expiration following a deep inspiration.
MV
Expired or Minute Ventilation.
Volume of expired air in liters per minute measured over a minimum of one
minute.
MVV
Maximum Voluntary Ventilation.
Maximum volume of air which can be moved on expiration while breathing
as deeply and as rapidly as possible.
RR
Respiration Rate.
FMFT
Forced Mid-expiratory Flow Time.
Time difference between the 25% and 75% points of the FVC.
FIVC
Forced Inspiratory Vital Capacity.
Inspiration volume achieved between a maximal expiration and a
maximal inspiration.
FIV
1.0
forced inspiratory air volume in liters measured in the first second.
FIV
1.0
/ FIVC
forced inspiratory air volume measured in the first second as a percentage of forced inspiratory vital
capacity.
FIV
1.0
/ FVC
forced inspiratory air volume measured in the first second as a percentage of forced expiratory vital
capacity.
PIF
Peak Inspiratory Flow.
Maximum inspiratory flow speed in liters / second.
FIF
(=MIF)
Forced (Maximum) Inspiratory Flow.
Maximum inspiratory flow in liters.
FIF
50%
(=MIF
50%
)
flow speed by 50 % of the forced inspiratory vital capacity.
