6-18
Troubleshooting
PARAMETER ACCURACYPARAMETER ACCURACY
ProblemProblem Corrective ActionCorrective Action
pH problems? Freeze
indicator problem?
The buffer in the sensors can freeze if exposed to below
freezing temperatures. This will result in a positive pH
offset while on bypass. Check the freeze indicator on the
sensor box to see if the sensors have been exposed to
freezing temperatures. If the freeze indicator is positive,
contact Terumo Cardiovascular Customer Administration
or your local Terumo Cardiovascular Sales representative.
Are your pO2 values
much higher than
the lab?
• Check to make sure halothane is not being used
as an anesthetic agent. Halothane presence in the
blood will be measured as O
2
presence.
• At very high pO2 levels, some laboratory electrode
signals can taper off and show lower than actual pO2
values. Check to see if the lab can be tested at high
pO2 calibration values.
Does your lab
sample have air
bubbles in it?
Air bubbles in the syringe can cause the pO2 and the pCO2
to go towards room air values (towards 150 mmHg for
pO2 and towards 0 mmHg for pCO2). The longer it takes
for the lab sample to be analyzed, the more pronounced
the room air contamination will be.
DO2 or VO2
calculation is off?
• Ensure you have the correct patient BSA entered.
• If using only venous side measurement probes,
ensure your arterial side saturation is correctly set.
• Verify the saturation, hematocrit and ow values
used are correct. If you are using arterial and venous
BPMs but no H/S, the hematocrit value must be
supplied manually, and the saturation values are
calculated.
pO2 and pCO2 values
have decimal points?
Check case prole conguration and make sure your
data units are correct (mmHg or kPa).
Saturation/Hgb
values are off?
• Check data options and make sure the saturation,
hematocrit and hemoglobin offsets are being used
correctly for your institution.
• Check the optical interface material on the CDI H/S
Cuvette to make sure it is undamaged, fully attached
and not contaminated by any debris.
• Check the optical surface of the CDI H/S Probe
to make sure it is not scratched, damaged or
contaminated by any debris.
To Next Page
Loading...