Triggering – neural (NAVA)

2015 nov - triggering - neural

Neural triggering (new triggering – mechanism of action) – very oversimplified explanation.

Brain receives a multitude of inputs (ex: pH, PaO2, carotid body sensors, stretch receptors, etc.)

Brain sends a composite signal (final summation signal) down the phrenic nerve.

NAVA catheter picks up final summation signal (Edi or EAdi – aka electrical activity of the diaphragm).

An Vt (tidal volume) proportional to the Edi is delivered.

Net result : improved patient control of breath and improved patient-ventilator synchrony.


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