Operator's Manual

6.3 Pulse oximetry
Tempus Pro User/Operator Manual - 41-2001EN-00 – Page 87
WARNING
Motion artefact may lead to inaccurate SpMet, SpCO, SpHb, and SpOC
measurements.
WARNING
Severe anaemia may cause erroneous SpO2 readings.
WARNING
Very low arterial Oxygen Saturation (SpO2) levels may cause inaccurate SpCO and
SpMet measurements.
WARNING
With very low perfusion at the monitored site, the readings may read lower than core
arterial oxygen saturation.
WARNING
Do not use tape to secure the sensor to the site; this can restrict blood flow and
cause inaccurate readings.
WARNING
Use of additional tape can cause skin damage or damage the sensor.
WARNING
If the sensor is wrapped to tightly or supplemental tape is used, venous
congestion/pulsations may occur causing erroneous readings.
WARNING
Venous congestion may cause under reading of actual arterial oxygen saturation.
Therefore, assure proper venous outflow from monitored site. Sensor should not be
below heart level (e.g. sensor on hand of a patient in a bed with arm dangling to the
floor).
WARNING
Venous pulsations may cause erroneous low readings (e.g. tricuspid valve
regurgitation).
WARNING
Loss of pulse signal can occur when:
 The sensor is too tight.
 The patient has hypotension, severe vasoconstriction, severe anaemia, or hypothermia.
 There is arterial occlusion proximal to the sensor.
 The patient is in cardiac arrest or is in shock.
WARNING
The pulsations from intra-aortic balloon support can be additive to the pulse rate on
the oximeter pulse rate display.
WARNING
Verify patient's pulse rate against the ECG heart rate.
WARNING
Misapplied sensors or sensors that become partially dislodged may cause either over
or under reading of actual arterial oxygen saturation.
WARNING
Avoid placing the sensor on any extremity with an arterial catheter or blood pressure
cuff.