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• Zero: Press it to perform Zero Resetting, then the following figure pops up on the window. Please note that
the sample unit of the CO
2
sensor must be placed in a drafty place. Then press on “Start Zero” button to
perform zero-resetting, then screen shows the current calibration status.
Three effective calibration status: 1. Zeroing 2. Zero success 3. Zero fail
The information prompts during Zero calibration, but there is no audible and visual alarm.
When perform a zero calibration during the measurement, disconnect the transducer from the patient’s air-
way first.
Please do not rely on the readings during zeroing.
Chapter 14
MONITORING CARDIAC OUTPUT (C.O.)
14.1 Introduction
The Cardiac Output (C.O.) function invasively measures cardiac output and other hemodynamic parameters
by use of the right heart (atria) thermodilution method. A cold solution with known volume and temperature is
injected into the right atrium through the proximal port of a pulmonary artery (PA) catheter. The cold solution
mixes with the blood in the right ventricle and the change in blood temperature is measured with a thermistor
at the distal end of the catheter in the pulmonary artery. The temperature change is displayed as a curve in
the C.O. split screen, and the monitor calculates the C.O. value from this curve. The C.O. value is inversely
proportional to the area under the curve.
14.2 Safety Information
Use the C.O. accessories specified in this manual only. Make sure that the accessories never come into
contact with conductive parts.
As cardiac output varies continuously, a series of measurements must be carried out to achieve a reliable
C.O. average value, and always use the average of multiple thermodilution measurements for therapy de-
cisions.
14.3 Setting Up the C.O. Measurement
Use any accessories specified in this manual. Make sure that the accessories never come into contact with
conductive parts.
If your monitor is configured with Plugin C.O. Module, then you need to make sure that the C.O. Plug-
and-Play box is securely inserted. If the box is inserted successfully, then the C.O. icon appears on the
upper right side of the screen. Refer to the following description.
If your monitor is configured with internal C.O. Module, then the C.O. icon appears on the upper right
side of the screen.
14.3.1 Understanding C.O. Icon and C.O. Plugin Box (Optional)
Preparation --- C.O. Connection
C.O. Plug-and-Play box (Optional)
The optioned Plug-and-Play box can be only configured with C.O. Module, or configured with other modules,
please refer to the box in your hand. If the Plug-and-Play box is equipped with IBP function.
Plug-and-Play box with C.O. function
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