Ventilator Modes Ventilator Breath Types Common Alarms
Ventilator Modes

Assist/Control (A/C)

  • Breaths delivered by the ventilator control either volume or pressure
  • Ventilator delivers the same measured breath every time
  • Breath can be initiated by the patient or the ventilator

Spontaneous (SPONT)

  • Patient-initiated and sustained breathing
  • Ventilator controls oxygen amount, and pressure
  • Delivers flow and volume as needed to help the patient breathe
  • Patient can breathe at a continuous positive airway pressure

Synchronized Intermittent Mandatory Ventilation (SIMV)

  • Combination of set patient or ventilator-initiated breaths delivered by the ventilator that control volume or pressure, and the patient’s own spontaneous breaths.

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