Theory of Operation
154
Operating Instructions Caleo, Software 2.n
Skin Temperature Measurement
ThermoMonitoringTM
Caleo temperature control characteristics
The desired temperature increase is achieved rapidly due to
the high heating power of Caleo. Lowering air temperature
takes longer, due to the good thermal insulation of the
incubator.
Note on setting air temperature setpoint for Caleo:
Inside the incubator, the infant has limited
– convective heat loss, because air velocity above the
mattress is low.
– heat loss through the mattress, because the mattress is well
insulated.
– evaporative heat loss, provided that humidity
*
is set
relatively high (above 60 %).
– radiant heat loss, provided that the canopy double wall
**
is
installed.
Skin Temperature Measurement
Two skin temperature sensors can be connected to measure
central (tummy) skin temperature (yellow skin temperature
sensor) and peripheral temperature (white skin temperature
sensor). The measured value of the yellow skin temperature
sensor is used to regulate the incubator heater in
"skin temperature control mode".
ThermoMonitoring
®
The term ThermoMonitoring refers to the continuous
measurement and display of a central temperature and a
peripheral temperature. Instead of the true central (core)
temperature, a central (near-core) skin temperature can be
used, as it is measured for the incubator’s skin temperature
control.
The continuous display of the difference between these two
temperatures permits early detection of cold stress. However,
heat stress, thermoregulation problems, and, e.g., infections
can also be more rapidly detected by displaying the two
temperature values and evaluating their difference.
Consequently, Caleo provides the possibility of switching
between a standard screen with large numeric digits and a
trend screen showing trend graphs of a maximum of two
temperatures. In this way, the difference between central skin
temperature and peripheral skin temperature essential for
ThermoMonitoring can be displayed continuously.
In addition, trend analysis allows to call up values from the past
when looking to explain, in hindsight, the development of
disease symptoms or the development of hypothermal stress.
Values going back a maximum of seven days can be
accessed. In addition, the desired time window can be set
(between 3 hours and seven days).
* Available option
** See Caleo accessories
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