C-22 624074/07
CASV
®
(Adaptive Support Ventilation)
The operator-set controls (manual):
• PEEP/CPAP
• Oxygen
• P-ramp
•ETS
• Trigger type and sensitivity
This list of controls is adjusted automatically by ASV, and
cannot be adjusted by the operator:
• SIMV rate: to change total respiratory rate
• Inspiratory pressure level: to change inspiratory volume
• Inspiratory time: to allow gas flow into the lungs
• Startup breath pattern
To safely start ASV, the operator inputs the Patient height set-
ting, which is used to calculate the IBW.
Three initial test breaths are delivered. The resulting rate and
tidal volume are measured and compared with the target val-
ues. ASV then responds to the differences between the actual
and target Vt as well as the actual and target rates.
C.3.4.2 Approaching the target
Figure C-10 shows a possible scenario after the three initial test
breaths. The actual breath pattern, which is plotted as the
patient symbol, shows clear deviation from the target. The task
of ASV is now to move the patient symbol as close to the circle
as possible.
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