[2][3] SIMV, with and without pressure support has not been shown to have any advantages over continuous mandatory ventilation (CMV) in terms of mortality[4] or weaning success,[5] and has been shown to result in longer weaning times when compared to t-piece trials or gradual reductions in pressure support.
[12] Allows spontaneous breathing with automatic adjustments of mandatory ventilation to the meet the patient’s preset minimum minute volume requirement.
If the patient maintains the minute volume settings for VT x f, no mandatory breaths are delivered.
MMV is the most optimal mode for weaning in neonatal and pediatric populations and has been shown to reduce long term complications related to mechanical ventilation.
[13] The ventilator varies the tidal volume and pressure based on the patients work of breathing, the amount it delivers is proportional to the percentage of assistance it is set to give.
Since the first implementation, ASV has undergone a number of refinements and is available on different ventilator brands under different names.