IMV
Also written as: IMV — intermittent mandatory ventilation
A ventilation mode providing mandatory breaths at preset intervals while allowing spontaneous breathing between them.
Full Definition
Intermittent mandatory ventilation (IMV) is a mechanical ventilation mode that delivers a predetermined number of mandatory breaths per minute at preset tidal volumes, while allowing the patient to breathe spontaneously between these mandatory breaths. The spontaneous breaths can vary in tidal volume and timing based on the patient's respiratory effort. This mode differs from synchronized IMV (SIMV) in that mandatory breaths are not synchronized with the patient's inspiratory efforts, potentially causing patient-ventilator dyssynchrony. IMV provides partial ventilatory support and is sometimes used during weaning processes.
Usage
Usage note: Often replaced by SIMV in modern practice due to synchronization advantages.
In Context
- "The patient was switched from IMV to SIMV to improve synchronization with spontaneous breathing efforts." — Ventilator adjustment note
- "IMV allows assessment of spontaneous respiratory function while maintaining baseline ventilatory support." — Weaning protocol