Patient-ventilator dyssynchronies

Jessica
4 min readNov 1, 2020

Dyssynchronies between inspiratory attempts of the patient and the inspiration by the ventilator could cause ventilator-induced lung injury (VILI). It is therefore important to recognize these dyssynchronies and act accordingly. On this page, you’ll find a quick overview of common dyssynchronies and how to treat them.

Normal patient ventilator interaction
  1. Patient wants to inhale: neural signal travels to inspiratory muscles, inhalation begins
  2. Ventilator is immediately triggered as a result of the patient’s respiratory effort (triggering) and the ventilator immediately provides the inspiration
  3. Patient wants to exhale → ventilator opens the expiratory valve immediately (cycling)
  4. Exhalation is finished for both the patient and the ventilator; a new inhalation is possible

Patient ventilator dyssynchronies

There are 6 patient-ventilator dyssynchronies you should be able to recognize and treat. These are Delayed triggering, Ineffective triggering, Auto-triggering, Reverse triggering, Premature cycling and Delayed cycling. Read on below!

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Jessica

I'm an intensivist and clinical pharmacologist, spreading the love for and knowledge of acute and critical care medicine on YouTube https://crit-ic.com/