14 Monitoring Carbon Dioxide
211
Setting up CO2 Corrections
Temperature, water vapor in the patient's breath, barometric pressure, and the proportions of O
2,
N
2
O
and Helium in the mixture all influence CO
2
absorption. If values seem inaccurately high or low, check
that the monitor is using the appropriate corrections.
Suppressing Sampling (not Mainstream CO2)
To temporarily stop sampling, in the Setup CO₂ menu, select Pump 15min Off or use the CO₂ Pump Off
SmartKey if available.
Selecting
Pump 15min Off again before fifteen minutes have passed resets the timer to fifteen minutes.
To re-start the pump, in the
Setup CO₂ menu, select Pump On.
Changing CO2 Alarms
This refers to CO
2
specific alarms. See the Alarms section for general alarm information.
To change the etCO
2
alarm limits, in the Setup CO₂ menu:
1 Touch the high limit on the alarm limits menu key.
2 Choose the high alarm limit from the pop-up list that opens.
3 Touch the low limit on the alarm limits menu key.
4 Choose the low alarm limit from the pop-up list that opens.
Correction
Altitude
(M3014A only)
Altitude is set during installation. The monitor automatically applies an
appropriate correction.
O
2
(M3014A only)
In the
Setup CO₂ menu, select Oxy. Corr and select a value between 20% and
100%, the default value is 20%.
Humidity At installation, the monitor is configured to automatically apply either Body
Temperature Pressure Saturated (BTPS) or Ambient Temperature Pressure
Dry (ATPD). To see which, go to the
Setup CO₂ menu, and scroll down to
look at
Hum. Corr or Humidity Corr..
N
2
O
(M3015A/B
microstream only)
In the
Setup CO₂ menu, select N₂O Corr. and turn on or off. If N
2
O is present
in the ventilation gas mixture, you must turn this on.
If the N
2
O correction is not available in the Setup CO₂ menu, the CO
2
measurement in your MMS Extension does not require N
2
O correction or it
is setup with
Gas Corr. (see below).
Gas
(M3014A only)
In the
Setup CO₂ menu, select Gas Corr. and select Helium, N₂O or turn off. If
Helium or N
2
O is present in the ventilation gas mixture, you must make the
appropriate selection.
If the Gas correction is not available in the
Setup CO₂ menu, the CO
2
measurement in your MMS Extension does not require N
2
O or Helium
correction or the N
2
O correction is setup with N₂O Corr. (see above).
Agent
(M3014A only)
In the
Setup CO₂ menu, select Agt. Corr and select the concentration of the
anesthetic agent (between 0.0% and 20.0%). If an anesthetic agent is present
in the ventilation gas mixture, you must select the appropriate concentration.