21 - 8 BeneVision N22/N19 Patient Monitor Operator’s Manual
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 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.
4. Select the thermodilution curves you desired in the history window, and select
Accept Average to obtain
the averaged value of parameters.
A maximum of six C.O. measurements can be stored. The monitor automatically performs calibration and
calculates the CCO and CCI values according to the C.O. measurements you select.
• If the monitor can not get a reliable pArt value during a C.O. measurement, the corresponding C.O.
value is invalid for CCO calibration.
• If the option of the auto pCVP measurement is not enabled, pCVP value should be manually updated
as soon as a new value is obtained to accurately calculate SVR and CCO.
• If the displayed continuous parameters are not plausible, they should be checked by a
thermodilution measurement. The PiCCO measurement will be recalibrated automatically.
• Faulty measurements can be caused by incorrectly placed catheters, interfering signal transmission
e.g. of arterial pressure, defective connections or sensors, or by electromagnetic interference.
• Aortic aneurysms may cause the displayed blood volume (GEDV/ITBV) derived by thermodiution
measurement to be erroneously high if the arterial thermodilution catheter is placed in the femoral
artery.
• The use of injectate solution with a temperature that is not at least 10°C lower than the blood
temperature may cause incorrect values for the thermodilution and CCO calibration.
• Three to five single thermodilution measurements within 10 minutes are recommended. For a stable
patient it is recommended to perform a thermodilution measurement every eight hours. For an
unstable patient it may be necessary to perform thermodilution measurements more frequently in
order to determine the patient’s volume status and to recalibrate the continuous determination of
C.O..
• As the pulse contour cardiac output of children has not been sufficiently validated thus far, the C.O.
should be checked by thermodilution before therapeutic interventions.
• A new measurement is recommended with significant changes in hemodynamic conditions, such as
volume shifts or changes to medication.
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