ventilator dyssynchrony
Mismatch between patient respiratory effort and ventilator-delivered breaths, resulting in ineffective or uncomfortable breathing patterns.
Full Definition
Ventilator dyssynchrony occurs when there is poor coordination between the patient's spontaneous breathing efforts and the mechanical ventilator's cycling patterns. This can manifest as trigger dyssynchrony (failure to trigger or auto-triggering), flow dyssynchrony (inadequate or excessive flow delivery), cycling dyssynchrony (premature or delayed breath termination), or double triggering. Dyssynchrony increases work of breathing, causes patient discomfort, prolongs mechanical ventilation, and may lead to ventilator-induced lung injury. Recognition and correction of dyssynchrony through appropriate ventilator adjustments, sedation management, or mode changes is essential for optimal patient care.
Usage
Usage note: Often hyphenated; avoid the colloquial 'fighting the vent' in formal documentation.
In Context
- "Severe ventilator dyssynchrony was noted, prompting adjustment of the flow trigger sensitivity." — Respiratory therapy progress note
- "The patient exhibited double triggering, a form of ventilator dyssynchrony requiring immediate attention." — Ventilator alarm assessment