A5/A3™ Operating Instructions 046-003777-00 4 - 29
Preoperative Tests Inspect the Active/Passive Anesthetic Gas Scavenging System
4.16 Inspect the Active/Passive Anesthetic Gas
Scavenging System
4.16.1 Inspect the AGSS
1. Connect the vacuum hose to the EVAC port or vacuum port of the healthcare facility and
turn on the waste gas disposal system. Adjust the position of the float to be between the
MIN and MAX lines by turning its flow adjustment knob (counterclockwise increases flow,
clockwise decreases flow).
2. Check if the float can rise and exceed the “MIN” mark. If any blockage, tackiness, or damage
occurs to the float, disassemble, clean the filter, and assemble the float again or replace the
float.
3. Drain any moisture from the waste gas hose. Reconnect the waste gas hose to the active
AGSS waste gas port.
NOTE: Do not block the active AGSS pressure compensation openings during
the inspection. If the float cannot rise, the possible reasons are:
1. The float surface is tacky. Turn over the active AGSS and check if the
float moves up and down freely.
2. The float is rising slowly. The filter may be blocked. Check if the filter
is blocked.
3. The waste gas disposal system is not working or the pump rate is less
than 50 L/min at which the active AGSS works normally. Check the
waste gas disposal system.
NOTE: The knob on the top of the scavenger is meant to adjust the flow from
the EVAC. When the knob is fully closed it does not need to completely
shut off flow.
4.16.2 Inspect the DGSS
1. Ensure that all waste anesthetic connections are secure, unused inlets are capped, and that
the DGSS® power cord is NOT connected.
2. Set the Auto/Manual ventilation switch to Manual.
3. Set fresh gas flow to 0 and fully open the APL.
4. Occlude the patient end of the circuit and observe the circuit pressure gauge. A value of less
than -2 cm H
2
O indicates a malfunction.
5. While keeping the patient end of the circuit occluded, press the oxygen flush button on the
anesthesia machine for approximately 3 seconds while observing the circuit pressure gauge.
6. Circuit pressures should not exceed 15cm H
2
O during this test.
7. Apply power to the DGSS® and repeat steps 2 through 6.
8. Frequent clicking sounds from the DGSS® may be heard during normal operation as the
reservoir bag fills and empties.
4.16.3 Inspect the Passive AGSS
1. Set the Auto/Manual ventilation switch to Auto.
2. Close the breathing system at the patient connection by connecting the Y-piece on the
breathing circuit to the leak test port.
3. Connect the passive AGSS assembly.
4. Set the O
2
flow to 10 L/min.
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