Terumo CDI 550, Operator'S Manual

Page: 78 / 173

monitoring a patient chapter 7 7-9
Note:
The user can enter flow data manually only if “manual” is specified for the
“ Source” option on the “calculations” setup screen (in setup mode).
Note: If oxygen consumption and oxygen delivery are desired when using 2 CDI BPMs
(only), the user must supply a hematocrit value. A set value for hematocrit will be displayed,
and is adjustable in the operate mode, by pressing the “adjust VO
2
” soft key. In this monitor/
module configuration, both arterial and venous oxygen saturations are calculated, and the
hematocrit is entered by the user. Blood flow data is obtained in the same way described
above.
Recalibrating during a procedure
Recalibrate the monitor periodically during in-line operation if it is necessary for the monitor
to correlate closer to the institution’s blood parameter laboratory measured values. (Each
institution shall determine their allowable variance between these two sets of measure-
ments.)
Note: The terms “recalibrating the monitor” and “in vivo recalibration” both refer to the same
process and are used interchangeably throughout this manual.
Note:
After changes of blood temperature of > 6°C, repeat an in vivo calibration of shunt
sensor values once temperature stability has been achieved. Optimal system accuracy will
be maintained by this practice.
Follow these steps to recalibrate the monitor:
1 When the blood parameter values have stabilized, press the “store” key before
drawing the sample(s).
This saves the currently displayed values in the monitor’s memory. The “store” key
changes to “recall” when the values are stored.
Caution
• For the best comparison with the laboratory values, press the “store” key only
after the circuit has been stabilized for approximately five minutes (when there
have been no changes in temperature, Fraction of Inspired Oxygen in a gas
mixture (FiO
2
), gas or blood flows, or other parameters that would cause changes
in displayed values). If the “store” key is pressed and/or the recalibration blood
sample is drawn during periods of significant temperature or gas change, the
system may not meet the system accuracy limits found in Appendix B.
• Draw the blood sample as close as possible to when the “store” key is pressed to
ensure the blood parameter values are calibrated as accurately as possible.
Note: If the stored values are outside of a parameter’s display range (showing dashes), the
user can change the adjusted value within the display range.
Note:
If the laboratory blood gas values are 37°C, the monitor must be in 37°C mode.
If the laboratory gas values are at patient temperature, the monitor must be in actual (@)
mode. The stored temperature mode can be switched in the recalibration screen, however
the temperature value used in the actual temperature mode cannot be adjusted.