Philips Efficia CM Series - Cardiac Output Problems

Troubleshooting Tables
Troubleshooting
3-14 Efficia CM Series Repair Guide
Cardiac Output Problems
Symptom Possible Cause Action
The C.O. measurements are not
reliable.
The blood temperature is
incorrect.
Verify the C.O. module is
calibrated. See “Cardiac Output
Test (C.O.)” on page 2-27.
Verify the cable connections.
Replace the cable.
Consider whether the catheter
should be replaced.
Replace the front end
assembly. See “Removing the
Front End Assembly” on
page 4-20.
The injectate temperature is
incorrect.
Verify the correct injectate
temperature is entered. See
the Efficia CM Series Patient
Monitors Instructions for Use.
Replace the injectate
temperature probe.
The difference between the
blood temperature and the
injectate temperature is not
wide enough.
Consider using iced injectate.
See the Efficia CM Series
Patient Monitors Instructions
for Use.
The wrong computation
constant is being used.
Verify that you are using the
correct computation constant
for the catheter that you are
using and the corresponding
injectate volume and
temperature. See the
instructions for use supplied
with the catheter.
The C.O. measurements cannot
be performed.
The patient cable is not
detected.
Replace C.O. cable.
Replace the front end board.
See “Removing the Front End
Assembly” on page 4-20.