SIMV + ASB: Synchronized Intermittent Mandatory Ventilation + Assisted Spontaneous Breathing
The SIMV + ASB mode is used for volume control ventilation with a fixed mandatory minute volume (MV). The patient can breathe spontaneously between the mandatory mechanical breaths and thereby increase the minute volume.
During spontaneous respiration, the mandatory mechanical breath is synchronized with the patient’s breathing. The mandatory minute volume and the mandatory respiratory rate remain unchanged.
The set maximum pressure limit (pMax) ensures the safety of the patient. The SIMV + ASB ventilation mode is also used as a mode for apnea ventilation. The patient can trigger a mandatory, pressure-controlled mechanical breath during a predetermined trigger time slot. The trigger time slot is available in the final 20% of expiratory time Te. For the rest of the time, the patient can breathe spontaneously or spontaneously with the aid of pressure support.
The following ventilation parameters can be set:
Vt: Tidal volume (breathing volume) in ml
Freq.: Ventilation rate in 1/min
PEEP: Positive end-expiratory pressure in mbar
pMax: Maximum inspiratory pressure in mbar
Δ pASB: Pressure support (relative to the set PEEP)
InTr: Inspiratory trigger
ExTr: Expiratory trigger
I:E: Inspiratory-expiratory time ratio