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Chapter 14: GAS Monitoring (Sidestream)
Don't use the device in the environment which contains flammable anesthetic gas.
Warning
Before any interpretations are made of EtCo2 reading and waveform, assure that the
capnography system is functioning correctly. Monitor contamination by secretions and
Partial obstruction of sampling line with water can result in distorted CO2 waveforms. A
leak in the sampling line may result in low EtCo2 measurements. Check the monitor to see
if it is functioning properly.
Warning
Returning sampled gas to the patient breathing system may cause infection.
Warning
Do not expose the monitor with sidestream capnography module to vibration and impact.
NOTE:
Do not apply tension to the ISA sensor cable.
Warning
Verify ISA sensor detection before starting GAS or CO2 monitoring. Unplug the ISA
sensor from its connector to verify that the error message " CO2 NO SENSOR "is
displayed.
Warning
Positioning the monitor lower than the patient may facilitate condensed water and
secretions move towards the system thereby resulting in blockage of filters. Keep the
system preferably above the patient level. This prevents secretions and water dribbling
down the tube towards the monitor end and extends the lifetime of the filters.
14.7 Zeroing procedure
The gas analyzer needs from time to time to establish a zero reference level for the gas
measurements and the flow. The zero calibration is here referred to as "zeroing".
ISA performs zeroing by switching the gas sampling from the respiratory circuit to ambient air.
The automatic zeroing is performed 1 to 3 times per day, and takes less than 3 seconds for ISA
CO
gas analyzers and less than 10 seconds for ISA Multigas analyzers.
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User Manual
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