- Pressure Controlled
- Time-Triggered (but doesn’t have to be)
- Pressure-limited, Flow-limited (but doesn’t have to be flow-limited)
This mode is typically used in patients with reduced lung compliance.
Typically, this mode is flow-triggered- the patient will become tachypneic if the tidal volume is inadequate, and this will compensate somewhat for the low tidal volumes you would expect in someone with very stiff lungs.
You get little control over the minute volume. The patient may take as many pressure-supported breaths as he feels like, all you can do is guarantee a certain minute volume with volume-controlled IMV.
CMV, IMV, SIMV, ACV- all these modes can be pressure-controlled. In this instance, the concept is demonstrated in the context of a CMV mode. But yes, you can set pressure as the control variable on any mode.