Philips MX400 - Changing the Lab Value Required for Entry; Further Information for Both Modules; Checking Suspicious Values; Calculating Oxygen Extraction

17 Monitoring Intravascular Oxygen Saturation
277
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 277 below.
8 If you need to enter a new correction factor, select Catheter Factor.
9 Enter the correction factor.
10 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.
Changing the Lab Value Required for Entry
You can change the lab value required to be entered: Hb [g/dl], Hb [mmol/l] or Hct [%].
1 In the Setup <SO₂ Label> menu, select Hb/Hct Entry.
2 Select your preferred lab value and unit.
Further Information for Both Modules
Checking Suspicious Values
If you have any doubts about the correctness of the measurement value, take a blood sample and have
it analyzed using standard laboratory procedures.
Calculating Oxygen Extraction
Oxygen extraction is the difference between the measured SpO
2
and SvO
2
values. If you are
monitoring SpO
2
and SvO
2
, the monitor can calculate this value and display it as a numeric.
• To switch oxygen extraction calculation on or off, in the
Setup Sp-vO₂ menu, select Sp-vO₂ and
toggle between
On and Off.
•If more than one SpO
2
value is available, you must choose which value is used in the calculation.
In the
Setup Sp-vO₂ menu, select SpO₂ Source and select the required source.
If one of the calculation sources becomes unavailable, the monitor displays the INOP
Sp-vO₂ Chk
Sources
for one minute. After this time, the calculation automatically switches off. If the missing
source becomes available again, the calculation automatically switches on again.