13 Monitoring Cardiac Output
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If you have followed all of these guidelines, your measurement values should be valid, even if you still
see a curve alert message. Ensure that at least three subsequent measurements within the current series
do not differ by more than 15%. If the difference exceeds 15%, use your clinical judgment to
determine the appropriate intervention.
C.O./CCO Prompt Messages
Prompt messages appear in the procedure window if a C.O. measurement trial must be terminated.
C.O./CCO Warning Messages
Warning messages contain important information about the C.O. measurement.
Very long curve The decay time of the curve is longer than 15 seconds.
Very short curve Decay time of the curve is less than 0.5 seconds. If there is a noisy
baseline, part of the baseline may have been mistaken for a
thermodilution curve. Calculated value for C.O. may not be
accurate.
Irregular curve Any combination of curve alert messages.
Delayed injection Injection is given more than 15 seconds after Start C.O. is selected.
Calculated value for C.O. may not be accurate.
C.O./CCO Curve Alert
Messages
Possible Causes
C.O./CCO Prompt Messages Possible Causes
Curve below baseline,
measurement terminated
May be caused by thermal baseline drift. No C.O. value
calculated.
Excessive curve height,
measurement terminated
The curve exceeds the upper limit. This may be caused by an
injectate that was too cold. No C.O. value calculated.
Unstable baseline, injection not
recommended!
The baseline is unstable. Wait until the baseline is stable before
injecting. If this does not occur within a reasonable time,
injection is possible but the accuracy of the measured values
may be reduced.
Excessive baseline drift, don't
inject now!
No measurement is possible. Measured values are incorrect.
C.O./CCO Warning Messages Possible Causes
Next measurement erases older
curve
Six curves are stored, this is the maximum possible. If another
measurement is stored, the oldest thermodilution curve will be
erased.
Previous C.O. setup data replaced A C.O. module or measurement extension module has been
plugged in with different C.O. setup data from the previous
data. The new C.O. setup data is read from the new C.O. device,
and replaces the current data. The message disappears when the
Start C.O. pop-up key is pressed.
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