Treaton MV200, Руководство пользователя

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5.1 Mainstream CO2 sensor (capnometer)
5-3
Do not use CO
2
measurement results as the only basis for measuring venti-
lation parameters without taking into account clinical data and independent
indicators, such as blood gases. CO
2
measurements may be inaccurate if
there is a leak in the circuit or the sensor is fault.
Place the CO
2
sensor and cable in a such way to avoid entanglement, suffo-
cation, or accidental rupture of the cable
Mainstream capnometer functioning
During operation mainstream capnometer displays the measured EtCO
2
value and capnogram
(if selected in the graph window).
The CO
2
concentration can be displayed on the screen as partial pressure (mmHg) and (or) as
the percentage concentration (%) depending on the settings of monitored parameter and graph-
ics in the menu.
During operation capnometer continuously analyzes the state of its technical parameters and
units. Together with capnometer device also has protocol converter.
In case of situations that prevent normal operation, capnometer is disabled with the failure mes-
sage: "Capnometer error" or "Protocol Converter error".
There is no influence on measuring accuracy of the mainstream capnometer in case of high
respiration rate and I:E ration.
The cyclic pressure below 10 kPa does not significantly influence on measuring accuracy of the
mainstream capnometer.
There is no drift in CO
2
concentration measuring accuracy: within 6 hours the measuring accu-
racy complies with stated one.
Measurement accuracy:
- CO2 concentration: ±(0,2+0,06K
meas
) %
- CO2 partial pressure ±(0,2+0,06P
meas
) mmHg
Total system response time and rise time: not more than 180 ms
Zero calibration of the mainstream capnometer
Zero calibration of the mainstream capnometer allows to compensate for the optical differences
between the various types of ventilation 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 adapter window.
Calibration should be carried out with the replacement of the airway adapter, as well as after its
disinfection / sterilization.
The zero calibration procedure of the module is available only upon comple-
tion of the warm interval of capnometer, which is about 2 minutes. At the
warm-up the appropriate message is displayed.
During the calibration procedure, the airway adapter shall be installed in the
mainstream CO
2
sensor and disconnected from the breathing circuit.
When the ventilation adapter is changed with the adapter of the same type, generally calibration
is not required.
To calibrate:
•
Wait for completion of warm-up interval of the capnometer (message of the warming up on
the display will disappear).
•
Enter
[
Menu]
→
[Service menu]
→
[Calibration]
→
[CAPNO].