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Table 1 Tidal breathing parameters

From: Breathing variability—implications for anaesthesiology and intensive care

RR Respiratory rate
TI Inspiratory time
TE Expiratory time
Ttot Total breath cycle time
Ti/Ttot Ratio inspiratory time: total respiratory time
VT Tidal volume
VT/Ti Mean inspiratory flow
MV Minute ventilation
VE CO2 Expired CO2 volume per breath
FE CO2 Mixed expired CO2 fraction per breath
Fet CO2 End-expiratory CO2 fraction