The following ventilator waveform shown below (Figure 3) is from a patient who is sedated and ventilated in the pressure regulated volume control mode (a pressure control mode with a target tidal volume). The patient has an arterial oxygen saturation of 94%.
That's obviously not the original college image.
The ventilator settings from the college image were as follows:
- PRVC mode
- 30% FiO2
- 7 PEEP
- 24 resp rate (actual patient rate was 25, but there were no spontaneous breaths)
- VT 450ml
- MVe is 10.7 L/min
- I:E ratio of 1:2
- Ppeak of 24
- Pmean of 7
Give the likely lung pathology. (10% marks)
Give two features shown in the flow waveform that support your answer. (20% marks)