624074/07 9-21
Procedure:
1. Run the tightness test and flow sensor calibration.
2. Open the P/V Tool window and make the following
settings:
3. You will see the query
Confirm PEEP change
. Select
Yes
.
4. Select
Start/Stop
to perform a maneuver.
5. Verify there is no gas leakage on the patient side and
confirm flow sensor performance at low ramp speed:
A.Move
Cursor 2
to the left to 35 cmH2O.
B.Examine the volume difference between the inflation and
deflation limbs, which is where the pause occurred (Fig-
ure 9-11). Verify this is less than 150 ml.
If the volume difference is greater than 150 ml, there is
a gas leak between the flow sensor and the demonstra-
tion lung. Minimize the leak (inspect the lung, tubes,
and connectors), and then repeat the maneuver until
the volume difference is less than 150 ml.
C.Examine the volume difference between the inflation and
deflation limbs at Ptop. An unacceptable leak on the
patient side appears as a volume difference > 150 ml
when the pause is applied at
Ptop
.
Pstart 0 cmH2O
Ptop 40 cmH2O
End PEEP 0 cmH2O
Ramp
speed
2 cmH2O
Tpause 15 s
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