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Troubleshooting
PARAMETER ACCURACYPARAMETER ACCURACY
ProblemProblem Corrective ActionCorrective Action
Accuracy problems?
Does the lab
temperature match
the CDI OneView
System temperature?
The temperature mode of the CDI OneView System
recalled values must match what is used by the laboratory.
If the laboratory values are reported at 37°C, ensure the
comparison values at 37°C or changed to 37°C values
after being recalled. Likewise, if the lab values are being
reported at actual temperature, ensure the system values
are stored in the actual temperature mode or changed
to actual after being recalled. Verify the lab values are
reported at the same temperature the system was using
at the time the values were stored. Any differences will
cause variation in the comparison.
Note: The parameter values displayed in the recalibration
screen are switchable to 37°C corrected or actual
temperature values regardless of the temperature mode
used when stored.
pCO2 problems?
What kind of prime
are you using?
Certain primes, including Normosol-R, Plasma-Lyte A
and Isolyte-S, contain acetic acid ions (acetate) that may
adversely affect the CDI OneView System CO2 sensor.
To avoid this contamination, do the following before
putting the sensors in line:
• Blow off enough CO2 to raise the pH above 7.0
• Add HCO
3
−
to the prime solution to raise the pH
above 7.0
OR
• Add the sensors at the last possible moment before
going on bypass to limit exposure of the sensors to
the acetic acid ions.
K
+
problems? What
kind of prime are
you using?
Exposure of the Shunt Sensor to prime solutions with pH
less than 7.0 or greater than 7.8 pH units can interfere
in the accurate measurement of potassium. To avoid K
+
problems, do one of the following:
• Isolate the sensor by adding it just before the
initiation of CPB or keep shunt lines closed.
OR
• Monitor pH levels in the prime in order to ensure the
pH is within the 7.0 - 7.8 pH units range.
Exposure of the Shunt Sensor to prime solutions with a
sodium measurement less than 120 or greater than 160
mEq/L can interfere in the accurate measurement of
potassium.
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