Operator's Manual

Chapter 6 Taking medical readings
Tempus Pro User/Operator Manual - 41-2001EN-00 – Page 86
WARNING
Do not use the pulse oximeter for any other purpose than specified in this manual. It
should NOT be used as an apnoea monitor.
WARNING
Pulse rate measurement is based on the optical detection of a peripheral flow pulse
and therefore may not detect certain arrhythmias. The pulse oximeter should not be
used as a replacement or substitute for ECG based arrhythmia analysis.
WARNING
A pulse oximeter should be considered an early warning device. As a trend towards
patient deoxygenation is indicated, blood samples should be analysed by a
laboratory co-oximeter to completely understand the patient’s condition.
WARNING
Tissue damage can be caused by incorrect application or use of the sensor, for
example by wrapping the sensor too tightly. Inspect the sensor site as directed in the
sensor Directions for Use to ensure skin integrity and correct positioning and
adhesion of the sensor.
WARNING
Interfering Substances: Carboxyhaemoglobin may erroneously increase readings.
The level of increase is approximately equal to the amount of carboxyhaemoglobin
present.
WARNING
Reposition
the oximeter probe at least once every hour to allow the patient'
s skin to
respire. This time should be reduced in ambient temperatures over 41 C. No other
special actions are required for use in such ambient temperatures although users are
advised to check the sensor site frequently in high temperatures to avoid skin
damage.
WARNING
The SpO
2
sensor should snugly fit the finger without straining it and if not alternative
fingers should be tried. The probe is sized for patients who weigh 20 kg /44 lbs or
more. The probe can be used either on patient’s fingers, thumbs or largest toe.
WARNING
The plethysmogram may become unstable on patients who are experiencing
convulsions or tremors, who are moving or are in motion (transport) environments.
WARNING
Always read and
follow the instructions on the packaging
of SpO
2
sensors regarding
their storage, use and disposal. In particular take into account any information
regarding toxicity.
WARNING
For measurements of high or low SpHb readings, blood samples should be analysed
by laboratory instruments to completely understand the patient’s condition.
WARNING
A pulse oximeter cannot measure elevated levels of COHb or MetHb. Increases in
either COHb or MetHb will affect the accuracy of the SpO2 measurement.
For increased COHb: COHb levels above normal tend to increase the level of SpO2.
The level of increase is approximately equal to the amount of COHb that is present.
For increased MetHb: the SpO2 may be decreased by levels of MetHb of up to
approximately 10% to 15%. At higher levels of MetHb, the SpO2 may tend to read in
the low to mid 80s. When elevated levels of MetHb are suspected, laboratory analysis
(CO-Oximetry) of a blood sample should be performed.
WARNING
Haemoglobin synthesis disorders may cause erroneous SpHb readings.
WARNING
Elevated levels of Total Bilirubin may lead to inaccurate SpO2, SpMet, SpCO, SpHb,
and SpOC measurements.