Terumo CDI 550 Operator's Manual page 102

Issue
pH problems? What is
the temperature like
outside?
Are your PO values
2
much higher than the
Lab?
Does your lab sample
have air bubbles in it?
O calculation seems
2
to be off?
PCO and PO values
2 2
have decimal points?
Saturation/Hemoglobin
values are off?
Meaning and/or Corrective Action
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 Customer Administration or your local
Terumo Sales representative.
„ Check to make sure Halothane is not being used as
an anesthetic agent. Halothane presence in the blood
will be measured as oxygen presence.
„ At very high PO levels, some laboratory electrode
2
signals can taper off showing lower than actual PO
values. Check to see if the Lab can be tested at high
PO calibration values.
2
Air bubbles in the syringe can cause the PCO
PO to go towards room air values (towards 0 mmHg for
2
PCO and towards 150 mmHg for PO
2
takes for the lab sample to be analyzed, the more pro-
nounced the room air contamination will be.
Check screen 5 in the "setup" mode and make sure
„
you have the correct patient BSA entered.
If using only venous side measurement modules,
„
make sure your arterial side saturation is correctly set
in screen 5 in the "setup" mode.
„ Check to make sure the Saturation, Hematocrit and
flow ( ) values used are correct. If you are using
arterial and venous BPMs but no CDI H/S Module, the
Hematocrit value must be supplied manually and the
Saturation values used are calculated.
Check screen 4 in the "setup" mode and make sure your
measurement units are correct (mmHg or kPa).
Check screen 5 in the "setup" mode 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 contami-
nated by any debris.
2
and the
2
). The longer it
2
troubleshooting 9-17