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10 Specifications and Theory of Operation
M1132382
10-21
SIMV-PC
1. Mandatory pressure control breath
2. Spontaneous pressure supported breath
3. Paw
4. Psupport
5. PEEP
6. Time
Figure 10-7 • SIMV-PC diagram
Synchronized Intermittent Mandatory Ventilation with Pressure
Controlled Ventilation is a mode in which a relatively slow mandatory
breathing rate is set with pressure-controlled breathing. This mode
combines mandatory breaths with spontaneous breath support. If a
trigger event occurs within the synchronization window, a new
pressure-controlled breath is initiated. If a trigger event occurs
elsewhere during the expiratory phase, a support for a spontaneous
breath is provided with pressure support added as set by the clinician.
SIMV-PC settings include:
•
Pinsp - sets the target airway pressure.
• RR - sets the rate of mechanically driven breaths.
• Tinsp - sets the inspiration time for a mechanical breath.
• Psupport - sets the pressure support level.
• Pmax - sets the maximum airway pressure.
• PEEP - sets the positive end expiratory pressure.
• Rise Rate - sets the amount of time to attain Pinsp.
• End of Breath - the drop in inspiratory flow from the peak
inspiratory flow level where the ventilator stops pressure support
mechanical inspiration and begins exhalation.
• Trigger - sets the flow trigger level.
• Trig Window - sets the range in percent of the exhalation phase
where a patient may trigger a mechanical breath.
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