Mindray WATO EX-65, Operator'S Manual

Page: 105 / 276

7-7
5. Position the patient O
2
sensor connector to the air.
6. Turn on ACGO.
7. Turn on the O
2
inlet and adjust the flow above 8 L/min. Turn off other gas supplies.
8. After two to three minutes, select [
Start
] from the menu to start to calibrate at 100% O
2
.
The screen prompts [
Calibrating
].
9. During the calibration, if you select [
Stop
], calibration is stopped. Then the message
[
Calibration Stopped! Calibration is unfinished.
] is displayed. This indicates invalid
calibration instead of calibration failure.
10. After a successful calibration, the screen shows [
Calibration Completed!
]. Otherwise,
the message [
Calibration Failure! Please try again.
] is displayed. In this case, you
need to do the calibration again.
11. Select to exit the current menu.
12. Turn off ACGO.
7.6 Water Build-up in the Flow Sensor
7.6.1 Prevent Water Build-up
Water comes from the condensation of exhaled gas and a chemical reaction between CO2 and
the sodalime in the sodalime canister. At lower fresh gas flows more water builds up because:
More CO2 stays in the sodalime canister to react and produce water.
More moist, exhaled gas stays in the breathing system and sodalime canister to produce
condensed water.
Check the inspiratory and expiratory flow sensors when abnormal flow waveform or unstable
tidal volume fluctuation is detected. Check the sensor for water. If there is water build-up,
clear it before use.
To prevent water build-up, solutions are:
1. Water condensation in the flow sensor can be eased using a filter between the flow
sensor and the patient.
2. Check the water collection cup for water before using the anesthesia machine. If there is
water build-up, clear it without delay.