22 - 6 BeneVision N Series Patient Monitor Operator’s Manual
â—† If Auto Start is enabled, C.O. measurements can be performed consecutively after you start the first
measurement, without the need for pressing Start between measurements.
8. Set the Auto pCVP.
â—† Enable Auto pCVP if the monitor is performing pCVP measurement. In this case, the monitor obtains
the pCVP value automatically.
â—† Disable Auto pCVP if the monitor fails to obtain the pCVP value. In this case, the pCVP value should be
input manually at pCVP.
• Input a proper pCVP value if Auto pCVP is disabled. The system adopts 5mmHg by default if the pCVP
value is not input manually.
22.6.3 Performing C.O. Measurement
To perform the C.O. measurement, follow this procedure:
1. Select the CCO numeric area to enter the C.O. Measure (CCO) menu.
2. Select Start and inject the bolus rapidly (<7sec) and smoothly as soon as the message Inject xx ml! displays
and prompt tone sounds. As shown in the figure above, during the measurement, the currently measured
thermodilution curve is displayed. At the end of the measurement, the measured values are displayed in the
history window and the monitor prompts you to wait for a certain period of time before starting a new
measurement. The T value should be greater than 0.15°C to ensure high accuracy. A low T can be caused
by a very high ELWI or an extreme low CI. If T is too low, you can try to increase it by the following method:
â—† Inject more volume (remember to reenter the injectate volume in the Setup page of the CCO menu
before injecting).
â—† Inject colder bolus.
â—† Inject the bolus in a shorter time.
3. Perform three to five single measurements directly after each other within a maximum of 10 minutes as
described in Step 2. A new measurement is available when you see the blood temperature is steady in the
C.O. Measure (CCO) window.
â—† If Auto Start is disabled in the Setup page of the CCO menu, you should repeat step 2 manually.
â—† If Auto Start is enabled in the Setup page of the CCO menu, the C.O. measurements can be performed
consecutively, without the need for pressing Start between measurements. A new thermodilution
measurement is possible as soon as Inject xx ml is displayed on the screen. The patient monitor
automatically detects further thermodilution measurements.
(1) Average values (2) History window
(3) Current measurements (4) Thermodilution curve
(5) Variation of blood temperature (T)
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