Ventilator initiated breath with positive pressure of about 17-18 cm H2O (controlled breath but notice the flow #4 and the volume #6)
Pressure dropped from 18 cm H2O to -10 cm H2O as a result of patient's effort
Ventilator breath triggered by patient's efforts in #2 (assisted breath with slightly higher pressure than #1; pressure regulation)
Very minimal inspiratory flow associated with breath #1(positive pressure but no flow)
Very high flow (about 100 L/min) generated as the result of patient's effort in the second breath in association with the assisted breath.
Very minimal inspiratory flow associated with the first breath #1
Large tidal volume (about 1200 mL) associated with the second breath.
Hello, just yesterday, I had a patient with very high PIP, which did not exceed 40 cmH2O because the maximum pressure (Pmax) was set at this level. The flow vs. time scalar displayed no inspiratory and expiratory flow, and the etCO2 was about 120 mmHg. We found copious fluid secretion in the ETT. After ETT suctioning, everything normalized (PIP, inspiratory and expiratory flow started displaying on the ventilator monitor, and etCO2 normalized). Unfortunately, I had to attend to the situation, and I did not take a screenshot of the ventilator.