5 Preoperative tests
M1204616 5-9
Circuit O2 cell The Circuit O2 Cell check measures the O2%.
1. Open the patient Y.
2. Set the Bag/Vent switch to Vent.
3. (ACGO option only.) Set the ACGO switch to Circle.
4. The display will show the O2%. Do not select Done when 21 is
first displayed. Allow the reading to stabilize, then select Done.
Calibrate the O2 cell if necessary.
5. Select another check or select Start Case to go to the Start Case
menu.
Low P leak The positive pressure Low P Leak check measures machine leaks
before the breathing system, between the common gas outlet and the
high pressure pneumatics and includes the gas mixer and vaporizer.
It measures low pressure pneumatic leaks with a pass or fail limit of
50 ml.
Note Make sure that the vaporizers to be used during the case are
mounted on the machine and turned off.
1. Occlude the inspiratory (right-hand) port.
2. Select Start.
3. The display shows the checks being run. The system beeps
when the check is done.
4. Repeat the check once for each vaporizer with one vaporizer
turned on at a time.
5. When the checks pass, turn the vaporizer off.
6. Open the inspiratory port and reconnect the breathing circuit.
7. Select another check or select Start Case to go to the Start Case
menu.
Low P leak
(machines with
ACGO)
The negative Low P Leak check measures machine leaks before the
breathing system, between the common gas outlet and the high
pressure pneumatics and includes the gas mixer and vaporizer. It
measures low pressure pneumatic leaks with a pass/fail limit of 50 ml.
Note Make sure that the vaporizers to be used during the case are
mounted on the machine and turned off.
1. Make sure the ACGO switch is set to ACGO.
2. Attach the squeeze bulb to the ACGO outlet.
3. Squeeze (collapse) the bulb.
4. If the bulb inflates in less than 30 seconds, select Fail.
5. If the bulb remains collapsed, repeat the check once for each
vaporizer with one vaporizer turned on at a time.
6. When the checks pass, turn the vaporizers off and remove the
squeeze bulb from the ACGO outlet.
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