Operation in Measurement Mode
21
Operating Ins
tructions V
amos, 1
. US ed.
SpO2 Measurement
SpO
2
Measurement
Tips for avoiding artifacts
●
Do not reuse adhesive strips – correct adhesion is no
longer guaranteed.
●
Do not fit the adhesive strip too tightly.
●
Never use two adhesive strips – this can lead to pulsation.
The pulse signal may fail.
High intrathoracic pressure, blood pressure tests, or other
rhythmically occurring adverse effects on venous circulation
can cause venous pulsation. The pulse signal may fail.
In the event of shock, low blood pressure, severe
vasoconstriction, severe anemia, hypothermia, arterial
blockage proximal to the sensor, or asystolia, the pulse signal
may fail.
NOTE:
Protect the sensor from exposure to bright light sources
(e.g. surgical lamps and direct sunlight). Otherwise the
pulse signal may fail, or measurements may be inaccurate.
NOTE:
Do not position the sensor at extremities with arterial
catheters, sphygmomanometer sleeve or intravascular
venous infusion – otherwise the pulse signal may fail and
measurements may be inaccurate.
Significant concentrations of dyshemoglobins,
e.g. carboxyhaemoglobin or methemoglobin can lead to
inaccurate measurements.
Intravascular dyes, such as methylene blue, can lead to
inaccurate measurements.
Electrosurgery can affect measurement precision.
●
Position the cables of the gas monitor and sensor as far as
possible from the electrosurgery equipment and its neutral
electrode.
The performance of the sensor can be impaired in the event of
significant movement by the patient, leading to inaccurate
measurement.
●
In such cases, change sensor location in order to reduce
movement artifacts.
WARNING !
Only use specified SpO
2
sensors, and position them as
instructed – otherwise there is the possibility of incorrect
measurements and tissue damage.
WARNING !
Damaged SpO
2
sensors with bare electric wires or
contacts must be removed from service immediately –
danger of electric shock.
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