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HemoSphere Advanced Monitor 13 Troubleshooting
13.6.2 CO Faults/Alerts
Table 13-14 HemoSphere pressure cable CO faults/alerts
Message Possible causes Suggested actions
Fault: CO – Check Arterial
Waveform
Arterial waveform is inadequate to
measure CO accurately
Poor pressure waveform over extended
period of time
Integrity of pressure monitoring line is
compromised
Systolic pressure too high or diastolic
pressure too low
Assess Edwards continuous CO system starting from
patient leading to pressure bag
Check the arterial waveform for severe hypotension,
severe hypertension, and motion artifact
Make sure the arterial catheter is not kinked or clotted
Make sure all arterial pressure lines are patent and
stopcocks are properly positioned
Make sure Edwards CO sensor is aligned with the
patient’s phlebostatic axis
Zero the Edwards CO sensor on HemoSphere advanced
monitor to zero transducer and confirm pressure cable
connection
Make sure the pressure bag is inflated and flush bag is at
least ¼ full
Perform Square Wave Test to assess the Edwards
continuous CO system frequency response
Fault: CO – Arterial Waveform
Compromised
Edwards pressure cable or sensor
malfunction
Internal system malfunction
Patient condition results in a low pulse
pressure
Integrity of pressure monitoring line is
compromised
CO sensor not aligned with the patient's
phlebostatic axis
Assess Edwards CO system starting from patient leading
to pressure bag
Check the arterial waveform for severe hypotension,
severe hypertension, and motion artifact
Make sure the arterial catheter is not kinked or clotted
Make sure all arterial pressure lines are patent and
stopcocks are properly positioned
Make sure Edwards CO sensor is aligned with the
patient’s phlebostatic axis
Zero the Edwards CO sensor on HemoSphere advanced
monitor to zero transducer and confirm pressure cable
connection
Make sure the pressure bag is inflated and flush bag is at
least ¼ full
Perform Square Wave Test to assess Edwards CO
system frequency response
Verify Edwards pressure cable and sensor and check for
missing pins
Change Edwards pressure cable
Change Edwards CO sensor
If problem persists, contact Edwards Technical Support
Fault: CO – Signal Processing
Malfunction
Pressure cable malfunction
Data processing error
Disconnect and reconnect pressure cable
Power monitor off and on to restore system
If problem persists, contact Edwards Technical Support
Fault: CO – Arterial Pressure
Disconnected
Arterial pressure low and non-pulsatile
Arterial catheter disconnected
Cable connections not detected
Edwards pressure cable or CO sensor
malfunction
Internal system malfunction
Verify arterial catheter connection
Verify Edwards pressure cable and CO sensor and check
for missing pins
Change Edwards pressure cable
Change Edwards CO sensor
If problem persists, contact Edwards Technical Support
Status = Released Printed Date: 2018-01-16 Released Date: 2017-09-14
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