2. When the phase is over, the vent valve closes and the pressure (monitored in the right column) oscillates following the
patient’s breaths. If the value drifts towards higher or lower values, the thermal equilibrium was not reached, and it is
necessary to open the vent valve, by pressing the icon VENT VALVE.
3. When the vent valve closes (after a time specified in the Body Box settings), observe the pressure column, and, if
necessary, repeat the previous step until the pressure no longer drifts.
4. At this point, the system is ready for the test. Ask the patient to breathe quietly, with the nose clips, supporting their
cheeks with their hands.