Operating Principles; Different Methods Of Temperature Measurement - Kaufman KM-25 User Manual

IV. O P
PERATING RINCIPLE
All objects, solid, liquid or gas, radiate energy whose intensity varies in relation to its temperature. The
Kaufman KM-25 thermometer measures the temperature of a person based on the energy that they radiate.
A temperature measurement is taken by the external probe on the device which constantly analyses and
registers the ambient temperature. When the operator holds the thermometer near to the body and
activates the radiation sensor, the temperature is taken instantly by measuring the infrared heat radiated by
the arterial blood flow. The temperature of the person is therefore measured without interference from the
ambient temperature.

DIFFERENT METHODS OF TEMPERATURE MEASUREMENT

Core temperature
Measuring core temperature is the most accurate way to measure body temperature, and involves
measuring the temperature of the pulmonary artery by means of a catheter which is fitted with a
in situ
temperature sensor to measure the temperature . Oesophageal temperature sensors work on the
same principle. However these invasive measurement methods require specialist equipment and skills.
Rectal thermometry
Rectal temperature adjusts slowly in relation to changes in the body's core temperature. It has been shown
that the rectal temperature remains raised well after the core temperature of the patient has started to fall,
and vice-versa.
In addition to this, rectal perforations have been known to occur when using this method, and without
suitable sterilisation rectal thermometry can propagate contaminants often found in faeces.
Visiomed - Kaufman KM-25 - V.2.3 -201012 5/21