3.11 Mainstream CO
2
Sensor
173
4 - field for setting the top alarm threshold by FiCO
2
;
5 - field for setting concentration units of CO
2
;
6 - measured value of FiCO
2
;
7 - measured value of EtCO
2
.
Figure 3-24. Window of gas analysis parameters
Before monitoring make the following:
Set the required scale and sweep speed of the capnogram curve.
Decreasing the sweep speed compresses the curve, allowing viewing the
data over a longer period of time. Increasing the sweep speed stretches the
curve for a more detailed study of the curve.
If necessary, set the required alarm levels and units of concentration for inspiratory and ex-
piratory concentration.
Set the mode of EtCO
2
readings averaging (FiCO
2
readings averaging is fixed at an interval
of 20 s and cannot be adjusted).
Set the gas temperature (default 37
C).
Set the type of balance gas (by default - air). If nitrous oxide is used, set N
2
O.
Incorrect balance gas type setting results in inaccurate compensation and
incorrect EtCO
2
and FiCO
2
readings.
Set the type of breathing circuit used. If the circuit type is set to "Open", the measurements
are based on the assumption that there is no CO
2
in the breathing gas during the inhalation
phase. The EtCO
2
value is calculated taking into account that FiCO
2
concentration is zero.
Incorrect setting of the circuit type leads to incorrect readings of EtCO
2
and
FiCO
2
.
If the
message “Zero calibration required” appears in the channel window of
the capnogram during monitoring, it means that the calibration condition is
violated and it is necessary to repeat the calibration (it. 3.11.4). Before start-
ing the calibration, ventilate and clean the adapter, excluding the presence
of residual carbon dioxide and wetness, or use a previously prepared clean
adapter or a new adapter.
3.11.4. Zero Calibration of the Mainstream CO
2
Sensor
Zero calibration of mainstream CO
2
sensor compensates for optical differences between differ-
ent types of airway adapters. These differences are caused by differences in the material of the
window of disposable and reusable adapters and differences in the size of the window of adult
and neonatal adapters.
The calibration procedure of mainstream CO
2
sensor becomes available on-
ly after the end of the capnograph warm-up interval that takes about 2
minutes. In this case, the message "Warming" is displayed in the capno-
gram output field.
Calibration is also not performed if there are breathing cycles on the capno-
gram.
During the calibration procedure, the airway adapter must be inserted into
the mainstream CO2 sensor and disconnected from the breathing circuit.
Summary of Contents for MPR6-03
Page 1: ...Patient Monitor MPR6 03 User Manual RM 501 01 000 01 01 UM Version 7 05 2020 ...
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