16 Monitoring Intravascular Oxygen Saturation
243
Making the In-Vivo Calibration
1 Be prepared to draw a blood sample from the patient.
2 In the Setup <SO₂ Label> menu, select Start In-VivoCal.
3 To clear the distal lumen, draw off and discard at least 2 ml of blood before taking the sample.
4 Draw a blood sample from the distal port of the catheter and flush the line according to standard
hospital practice.
5 Obtain laboratory analysis of the sample using direct measurements.
6 Select CalibrationValue and select from the list the value received from the lab.
7 Complete the calibration by selecting Store In-VivoCal (even if the stored calibration value did not
change) and select
Confirm. This updates the data stored in the optical module.
Selecting
Recall Last Cal recalls the previously stored calibration value.
If the calibration fails, check that the light intensity indicator is indicating a stable medium to high level.
Repeat the calibration.
Setting Up the In-Vivo Calibration
Check for:
• proper positioning of the probe/catheter in the patient.
• relatively stable oxygen saturation in patient.
• that the light intensity indicator is indicating a stable medium to high level.
Depending on the probe/catheter in use you may need to enter a catheter correction factor. This will
be indicated in the table in the Accessories chapter or in the catheter documentation.
1 In the Setup <SO₂ Label> menu, select Catheter Factor.
2 Enter the correction factor.
Making the In-Vivo Calibration
1 Be prepared to draw a blood sample from the patient.
2 In the Setup <SO₂ Label> menu, select Start In-VivoCal.
3 To clear the distal lumen, draw off and discard at least 2 ml of blood before taking the sample.
4 Draw a blood sample from the distal port of the catheter and flush the line according to standard
hospital practice.
5 Obtain laboratory analysis of the sample using direct measurements.
6 Select CalibrationValue and select from the list the value received from the lab.
7 Select Hct [%] (or Hb [mmol/l] or Hb [g/dl] depending on the set up) and enter the corresponding
value from the laboratory analysis.
To change the setup for entering the Hb/Hct, see “Changing the Lab Value Required for Entry”
on page 244 below.
8 Complete the calibration by selecting Store In-VivoCal (even if the stored calibration value did not
change) and select
Confirm. This updates the data stored in the optical module.
Selecting
Recall Last Cal recalls the previously stored calibration value.
If the calibration fails, check that the light intensity indicator is indicating a stable medium to high level.
Repeat the calibration.
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