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# Intermittent Mandatory Ventilation (IMV) Intermittent mandatory ventilation (IMV) allows the patient to breathe spontaneously between time-triggered ventilator breaths. The patient can breathe gas at the same FO2 and baseline pressure, without needing to trigger a mandatory breath. Spontaneous b...

# Intermittent Mandatory Ventilation (IMV) Intermittent mandatory ventilation (IMV) allows the patient to breathe spontaneously between time-triggered ventilator breaths. The patient can breathe gas at the same FO2 and baseline pressure, without needing to trigger a mandatory breath. Spontaneous breaths can be augmented using pressure support to increase the patient's tidal volume and reduce inspiratory work associated with the endotracheal tube's resistance. # Pressure Support Pressure support is a variation of the spontaneous mode of ventilation. It augments spontaneous effort with positive pressure. The patient triggers each breath, and a preset pressure is delivered until the flow rate reaches between 10% to 40% of the peak inspiratory flow. Expiration then begins and flow is variable, increasing to maintain desired pressure support. **Figure 3-14:** Shows a pressure-time scalar graph in pressure-controlled mode. It includes labels for inspiration, end-expiration/inspiration, pressure plateau, end-inspiration/expiration, end-expiration, inspiratory time, expiratory time, and total cycle time. **Figure 3-15:** Represents a scalar presentation of intermittent mandatory ventilation (IMV). The graph shows mechanical and spontaneous breaths. **Notes:** * Patient: Pneumonia, Low lobe, and Hypoxia * Position: Not specified

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