GE Aestiva 5 Service Manual

							2 Cleaning and Sterilization
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Disassemble the patient path
Step 1
Open the access panel.
Step 2
Push up on the latch located under the 
flow sensor module. 
Step 3
Remove the flow sensor module. You 
will feel some resistance. Continue to 
pull.
Step 4
Disconnect the cable and remove the 
O
2 sensor.
AA.96p.009
AA.96p.010
AA.96p.011
AA.96p013, 014 
						

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Step 5
Completely loosen the thumbscrew on 
the breathing circuit module. 
Step 6
Remove the module. You will feel some 
resistance. Continue to pull. 
Step 7
Push the metal button to the first stop. 
Pull out the bag arm.
Step 8
Push the metal button to the 
second stop and open the top panel.
AA.96p016
AA.96p017
AA.96p018
AA.96p020 
						

							2 Cleaning and Sterilization
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Autoclave assemblies marked 134°C. Refer to the Section “Clean and 
sterilize” for complete instructions. To assemble the circuit refer to the Setup 
section.
Step 9
Push the release button and remove 
the bellows assembly (pull up).
Step 10
Remove the main manifold.
AA.96p021, 23
AA.96p024 
						

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Canister disassembly
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To prevent damage, pull the release handle forward. Then turn the handle 
Step 1
Pull the release forward.
Step 2
Turn the release clockwise.
Step 3
Pull down and out on the canisters.
wZ
AA.96p026
AA.96p028
AA.96p029 
						

							2 Cleaning and Sterilization
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Continue with the next section or go to "Clean and sterilize". To assemble, 
refer to the Setup section.
Step 4
Push in the buttons on each side of the 
top dish.
Step 5
Lift up the drain dish.
Remove the top dish and drain dish.
AA.96p053
AA.96p054 
						

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Disassemble the scavenging path
These parts send exhaled gas to the disposal system, not the patient. 
Exhalation valve
Complete the basic disassembly 
procedure.
Push in the latches and pull out the 
exhalation valve.
Scavenging reservoir
Loosen the knob and remove the rear 
cover.
Pull the reservoir up and to the rear.
Twist and pull down to remove the tube.
AB.23.089
AB.23.090 
						

							2 Cleaning and Sterilization
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How to clean and disinfect the flow sensors
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Do not autoclave plastic flow sensors. 
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Do not use high-pressure gas, or brushes to clean the flow sensors.
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Do not use cleaning solvents that are not approved for use with 
Polycarbonates (e.g. CIDEX Plus).
 
CIDEX sterilizationBoth Datex-Ohmeda and the manufacturer of CIDEX (Johnson & Johnson) 
have tested this procedure.
•CIDEX must be 14 day mixture, with activator vial REF REORDER # 2245
•One liter of this solution cleans four (4) flow sensors
Procedure (Figure 2-3)1. Remove the flow sensor module from the absorber. Refer to “Disassemble 
the patient path” in this section.
2. Remove the flow sensors from the module.
•Push in the latch.
•Pull off the cover.
•Remove the flow sensors.
3. Submerge the flow sensor and tubes in activated CIDEX solution. Keep the 
connector dry.
4. Keep the solution in the tubes for the sterilization period.
5. Submerge the flow sensor and tubes in distilled water. Again, do not get the 
connector wet.
6. Rinse as indicated in CIDEX instructions. 
7. Do steps 5 and 6 again to remove all CIDEX. 
8. COMPLETELY dry the flow sensor and the tubes before you use the sensor. 
Use a dry syringe, or connect vacuum or pressure to remove all liquid from the 
sensor (sensor, tubes, and connector):
•Minimum time: 1 min
•Maximum vacuum: 30 in Hg
•Maximum flow: 10 L/min flow
•Maximum pressure: 345 kPa (50 psi). 
						

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Figure 2-3 • Steps 2-8
Step 2
Steps 3 and 4
Steps 5, 6 and 7
Step 8 
Dry for > 1 min with these precautions:
• Maximum vacuum 30 in Hg
• Maximum flow 10 L/min
• Maximum pressure 345 kPa (50 psi) 
						

							2 Cleaning and Sterilization
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These instructions assume that the system has the optional CO2 bypass 
feature installed.
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11 1 1
Remove the absorber canisters. (Also described in “Canister disassembly” in this section.)
a. Pull the canister release handle forward.
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To prevent damage, pull the canister release handle forward before turning the 
handle.
b. Turn the release handle clockwise.
c. Lift out the canisters.
Note: The canisters should drop under their own weight when released. If they do not, clean and lubricate the pins in 
the drain dish and sockets in the base.
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Release the CO2 bypass assembly by 
pushing both buttons (one on each side 
of the assembly).
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33 3 3
Pull down on the CO2 bypass assembly 
(a) to remove it and lift the drain dish 
(b) up.
a
b 
						

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44 4 4
Clean and sterilize the bypass 
assembly:
a. Immerse the assembly into a 
solution of mild detergent and 
water.
b. Agitate the assembly in the 
solution while repeatedly 
actuating and releasing the 
plate.
c. Rinse the assembly by 
immersing it in clean water and 
agitating it again with the plate 
actuated and released.
d. Autoclave the assembly at 
134°C.
e. Cool about 40 minutes at room 
temperature.
Note: Optionally, the bypass assembly can be divided into two smaller sections for easier cleaning by releasing the 
top clamp (a) and pulling the hose from the assembly. When reassembling, reattach the hose to the bottom part of the 
assembly. Secure the hose with the clamp and pinch the clamp one notch past finger-tight with pliers.
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55 5 5
Reinstall the bypass assembly:
a. Reinstall the drain dish.
b. Insert the bypass assembly.
c. Push back and adjust to locate 
the access holes for the top 
ports.
d. Push the buttons on each side of 
the assembly and push the 
assembly up; both buttons 
should snap into place.
e. Pull down on the assembly to 
make sure it is locked into place.
a
ab
d
c