Mindray PM-9000, Operation Manual

Page: 285 / 378

CO
2
Monitoring
17-9
NOTE
z
Set the N
2
O COMPEN, O
2
COMPEN and Des COMPEN according to the
practical situation. Incorrect setting might incur errors from the actual
value and cause misdiagnosis.
When BTPS is turned ON, the system performs BTPS compensation automatically;
when BTPS is turned OFF, the BTPS compensation is disabled.
When measuring the CO
2
content inside the patient’s lung, turn ON BTPS. Normally,
the lung temperature of the patient is 37
℃
and the water vapor is sufficient or
regarded as saturated. But the temperature and water vapor content of the sampling
line are different from the patient’s exhalation. Thus, when the patient’s exhalation
passes the sampling line, the accuracy of the CO
2
concentration measured by the
sensor will be adversely affected. To ensure an accurate measurement, you should
turn ON the BTPS. In this mode, the system adjusts the calculation coefficient
automatically, so that the measured value is just the actual CO
2
content in the
patient’s lung.
When measuring the CO
2
content of the environment or a certain vessel, turn OFF
BTPS. In the standard ambient pressure and dry gas, the accuracy of the sensor
measurement is not affected.
NOTE
z
When measuring a moist gas of saturated water vapor at the body
temperature and the ambient pressure, turn ON BTPS; when measuring
a dry gas at the ambient temperature and pressure, turn OFF BTPS.
„ ZERO CAL This option allows you to zero manually so as to eliminate
the adverse affect of baseline drift in the process of
measurement.
„ DEFAULT >> Select DEFAULT >> to access the CO2 DEFAULT
CONFIG menu. You can select either FACTORY
DEFAULT CONF or USER DEFAULT CONF. After
finishing the selection and exiting the menu, a dialog pops
up asking for confirmation of your selection.