Median for the Tidal Volume Actual (MPOG concept id: 3190) for a case, among valid tidal volumes.
A tidal volume is noted to be valid, if the following conditions are true:
1) ETCO2 >= 5 mmHg
2) Peak Inspiratory Pressure >= 5 cm H2O
3) Tidal Volume Actual >= 100 mL and <=2000
4) The above conditions are true for 3 consecutive minutes, following the time of measurement.