synchronized intermittent mandatory ventilation
Ventilator mode that delivers mandatory breaths synchronized with patient's inspiratory efforts while allowing spontaneous breathing.
Full Definition
Synchronized intermittent mandatory ventilation (SIMV) is a mechanical ventilation mode that combines mandatory machine-delivered breaths with the patient's spontaneous breathing efforts. The ventilator synchronizes mandatory breaths with the patient's inspiratory efforts when detected, and delivers time-triggered breaths if no effort is sensed within the set interval. Between mandatory breaths, patients can breathe spontaneously at their own rate and tidal volume, often with pressure support. This mode facilitates weaning from mechanical ventilation by gradually reducing the number of mandatory breaths while maintaining ventilatory support. SIMV helps maintain respiratory muscle function and provides psychological comfort by preserving some degree of breathing control.
Usage
Usage note: Often abbreviated as SIMV in clinical practice; hyphenate compound adjectives when needed.
In Context
- "The patient was transitioned to synchronized intermittent mandatory ventilation as part of the weaning protocol." — Ventilator management note
- "Synchronized intermittent mandatory ventilation allows gradual reduction of ventilatory support." — Clinical procedure manual