Mindray PM-9000

CO
2
Monitoring
17-17
Other Setup
Selecting the OTHER SETUP option opens the following menu.
Figure 17-9 CO
2
Other Setup Menu
You can perform the following settings in this menu.
 MAX HOLD
Maximum holding time
It determines the maximum holding time of the CO
2
parameters.
Options: OFF, 10S, 20S and 30S.
 BTPS
Body temperature and pressure, Saturated
Options: ON and OFF.
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.