13 Monitoring Cardiac Output
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2
Attach the injectate temperature probe housing to the PA line.
3 Plug the C.O. interface cable into the C.O. module or measurement extension module and connect
the following devices into the C.O. interface cable:
– injectate temperature probe
– remote start switch (if used).
Follow your hospital standards to avoid unintentional extraction of the C.O. catheter. Secure the
cable using the mounting clip shipped with each C.O. interface cable. You may also find it helpful
to loop the C.O. interface cable, tape the loop, and attach it to the undersheet of the patient's bed
using a safety pin.
4 Plug the thermistor connection cable of the PA catheter into the thermistor connector.
5 Connect the injectate temperature probe to the injectate temperature probe housing.
6 Check that the correct measurement method is selected.
If a catheter is already connected to the Cardiac Output Interface Cable, the monitor automatically
recognizes the method used. If not, in the
Setup C.O. menu, select Method and then select Right
Heart
.
Ice-Bath Setup for RH Thermodilution C.O. Measurements
If you are using the flow-through method illustrated above, the injectate temperature is measured at
the time of injection by the temperature probe in the injectate temperature probe housing.
If you are using the ice-bath setup, the injectate temperature probe and the injectate are both placed in
an ice-bath and the probe measures the temperature of the contents of the ice bucket.
Setting the Computation Constant
Check that the correct Computation Constant is entered in the procedure window. This can be found
in the documentation supplied with the catheter and is based on the injectate volume, injectate
temperature and catheter type. To change the value, in the procedure window, select
Computation
Constant
and use the pop-up keypad to enter the correct value.
Performing RH C.O. Measurements
1 Enter the procedure window.
2 When you see the message Ready for new measurement, select the pop-up key Start C.O.. If the
measuring mode is set to
Auto the Start C.O. key will also enable the automatic start of
consecutive measurements.
3 When you hear a ready tone and see the message Inject now!, inject the solution into the right
atrial port of the Swan-Ganz catheter. The optimal injection rate is 2.5 ml/second.
At the end of the measurement the thermodilution curve, cardiac output, index values and curve
alerts (if necessary) are displayed and a message will appear
Wait before starting new
measurement
or in Auto mode Prepare for next injection or press Stop.
4 When you see the Inject now! message, repeat the procedure until you have completed the
measurements you want to perform. You can perform a maximum of six measurements before
editing. If you perform more than six measurements without rejecting any, the oldest will
automatically be deleted when a seventh curve is stored.
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