The following ventiator waveform shown below (Figure 4) 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%.
Give the likely underlying lung pathology. (10% marks)
Give one feature shown in the flow waveform that supports your answer. (10% marks)
a) Any lung pathology associated with poor compliance such as severe restrictive pathologies
b) Inspiratory flow drops sharply very early in inspiration
The original college image also had 100% FiO2, but the other settings were:
- PRVC mode (not SIMV PRVC)
- PEEP 6
- RR 30
- VT 260
- Mve 7.6
- Ppeak 33
- Pmean 19
In every other respect, "any lung pathology associated with poor compliance" applies equally well to both images.