Table of Contents
Advertisement
Aespire 7900
Pressure control mode
Pressure control
mode settings
SIMV mode
6-20
Figure 6-6 • Pressure control diagram
Pressure control supplies a constant set pressure during inspiration. The
ventilator calculates the inspiratory time from the frequency and I:E ratio
settings. A high initial flow pressurizes the circuit to the set inspiratory
pressure. The flow then decreases to maintain the set pressure (Pinspired).
Pressure sensors in the ventilator measure patient airway pressure. The
ventilator automatically adjusts the flow to maintain the set inspiratory
pressure.
• Pinspired (control pressure)
• Rate
• I:E
• Plimit (pressure limit)
• PEEP
P
aw
1
P
support
PEEP
T
I
1. 1. Mandatory SIMV breath
2. 2. Spontaneous pressure supported breath
Figure 6-7 • SIMV diagram
Synchronized Intermittent Mandatory Ventilation (SIMV) is a mode in which
periodic volume breaths are delivered to the patient at preset intervals (time-
triggered). Between the machine delivered breaths, the patient can breathe
spontaneously at the rate, tidal volume and timing that the patient desires.
2
Time
1009-0633-000
Advertisement
Table of Contents
