Vyaire SpiroUSB Manuel D'utilisation page 66

Forced expiratory flow at 50% of volume as a percentage of FIF50
(FEF50/FIF50)
The time taken between 25% and 75% of the forced expired
volume (FEF2575)
Forced Expiratory Time (FET)
Tidal Volume (TV)
Expiratory reserve volume (ERV)
Inspiratory reserve volume (IRV)
Inspiratory capacity (IC)
Expiratory Relaxed vital capacity (EVC)
Inspiratory vital capacity (IVC)
Breathing frequency rate (FR)
Inspiratory time (TI)
Expiratory time (TE)
TI as a % of total breath time (TI/Ttot)
Tidal volume as a % of TI (TV/TI)
Breath Rate
Breathing Time
Volume Tidal
Expiratory Time - average time of expiration
per breath in seconds
Inspiratory Time - average time of inspiration
per breath in seconds
Total Tidal Breath Time in Seconds
Ratio of Average Expiratory and Inspiratory
Breaths
Average Time of Expiration per Breath as a
ratio to the Total Tidal Breath Time
Tests per subject:
Predicted Values:
Transducer:
5 VC manoeuvre
8 FVC manoeuvres
Various – depends upon national
preference
Bi-Directional Digital Volume.
Vyaire
66
BR
BT
VT
TE
TI
Ttot = TI + TE
TI/TE
TI/Ttot