The topic today is APRV ventilation, or also known as by vent.

It is a mode of ventilation that has recently gained more and more attention and popularity.

It is by no means a new mode of ventilation. It's been around for some period of time.

Before we go into some of the mechanics and reasons the popular use of APRB, it's again important to review the concepts of PEP and CPAP.

We have previously talked on two separate episodes of the physiology of PEP as well as some of the negative implications of PEP.

For the point of review, PEP is end expitory pressure and supply during continuous

mechanical ventilation.

However, if one is providing pressure on a spontaneously breathing patient without partial

voluntary support, this is known as CPAP.

So simply put, peep is the pressure where we end exhalation on a mechanically

ventilated patient, hence peak respiratory, excuse positive end-exemptory pressure, and CPAP, or continuous

positive air pressure, is the pressure we apply to a circuit for a spontaneously breathing patient.

EPRV is a very unique mode of ventilation and often novices to mechanical ventilation are often confused

and intimidated by this mode of ventilation

because of the unique inspiratory

expatory phases that are associated with APRV.

The key to APRV ventilation is to imagine that you're not actually mechanically ventilating the patient.

It is a mode where you're trying to keep the patient as spontaneous as possible.

Now keep in mind the difference between PEEP and CPAP.

We said CPAP was continuous positive airway pressure

applied to a circuit to a patient who's spontaneously breathing.

Now if we took a patient, if we took someone who's awake,

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