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Troubleshooting
Laboratory Comparison Troubleshooting Table
The following table details information you can use to determine why your CDI OneView
System values appear to be inaccurate with respect to laboratory values:
PARAMETER ACCURACYPARAMETER ACCURACY
ProblemProblem Corrective ActionCorrective Action
Accuracy problems?
Has the circuit
stabilized before
drawing a laboratory
comparison sample?
• Wait approximately ve minutes after making
a change to blood ow rate, gas ow rate, FiO2,
temperature, etc. Watching the CDI OneView
System parameter values for roughly one minute will
indicate whether or not the circuit has stabilized. The
graphics display is also helpful for checking blood
parameter stability.
• Check to see if the values measured 1-2 minutes after
storing have moved closer to the corresponding
lab values. If so, this suggests that dynamic blood
parameter changes and the system’s time response
are responsible for the comparison difference.
Performing an in vivo recalibration under these
conditions is not recommended.
• A blood ow rate of less than 35 mL/min in the CDI
Shunt Sensor line may result in slower measurement
response times. Restoration of the ow rate back
above 35 mL/min will return the sensor readings to
normal.
• A minimum blood ow rate through the
CDI H/S Cuvette may result in inaccurate
saturation/hematocrit readings. Restoration of the
ow rate back above minimum requirement will
return the CDI H/S Cuvette readings to normal.
• Air bubbles or uid other than blood (such as
medication given in the shunt line and passing the
Shunt Sensor) will affect the Shunt Sensor readings
intermittently. As soon as the air or uid clears the
Shunt Sensor, values will return to normal.
• After changes of blood temperature of > 6°C, repeat
an in vivo recalibration of Shunt Sensor values once
temperature stability has been achieved. Optimal
system accuracy will be maintained with this practice.
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