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Volume control mode
11-18
Volume control supplies a set tidal volume. The ventilator calculates a
flow based on the set tidal volume and the length of the inspiratory
time (TI) to deliver that tidal volume. It then adjusts that output by
measuring delivered volumes at the flow sensors. Since the ventilator
adjusts output, it can compensate for breathing system compliance,
fresh gas flow, and moderate breathing system leaks.
A typical volume-controlled pressure waveform increases throughout
the entire inspiratory period, and rapidly decreases at the start of
expiration. An optional inspiratory pause is available to improve gas
distribution.
Volume control mode settings:
•
TV
•
RR
•
I:E
•
Tpause
•
PEEP
•
Pmax
1. Paw waveform
2. Tinsp
3. Insp Pause
4. Texp
5. PEEP
6. Flow waveform
7. TV
Figure 11-1 • Volume control diagram
M1145956
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