IV. OPERATING PRINCIPLE
All objects, solid, liquid or gas, emit energy by radiation. The
intensity of this energy depends on the temperature of the object.
The RC008 infrared thermometer is therefore able to measure the
temperature of a person by the energy the person emits. This
measurement can be taken thanks to an external temperature probe
on the device which permanently analyses and registers the ambient
temperature. Therefore, as soon as the operator holds the
thermometer near the body and activates the radiation sensor, the
measurement is taken instantly by detection of the infrared heat
generated by the arterial blood flow. Body heat can therefore be
measured without any interference from the heat of the surrounding
environment.
THE DIFFERENT METHODS OF TEMPERATURE MEASUREMENT
Core temperature
Core temperature is the most precise measurement and involves
measuring the temperature in the pulmonary artery by means of a
catheter equipped with a thermal probe which can read the
temperature in situ. The same method is employed for probes
measuring the oesophageal temperature. However, such invasive
temperature measurement methods require specific equipment and
expertise.
Rectal thermometry
Rectal temperature adjusts slowly in comparison to the evolution of
the body’s internal temperature. It has been demonstrated that
rectal temperature remains raised long after the internal temperature
of the patient has started to drop and vice versa.Furthermore, rectal
perforations have been known to occur as a result of this method
and without appropriate sterilisation techniques, rectal thermometry
can spread germs often found in faeces.
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