Errors in skin temperature measurements. Page: 29
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Fig. 2.29 Vector heat flux diagram for k= 0.06 W/m-C and (Ob = 0.003 (m3/s)/m3.
2.5 Concluding Remarks
In clinical practice, it is common to measure skin-surface temperature by making
use of a direct-contact device which is affixed to the skin by means of an adhesive film.
Physical intuition would argue that such a device should be constituted so that it does not
obstruct the heat flow between the skin surface and the surroundings. It is, therefore,
remarkable that common direct-contact, skin-surface temperature measurement devices
incorporate a foam pad in their construction. The assessment of the measurement errors
caused by the presence of such insulation pads has been the focus of this investigation.
The magnitude of the thermal conductivity of the pad was found to be the controlling
parameter with respect to the temperature measurement error. In the limiting case of a
conductivity of zero, the calculated measurement error is 1.5 C. For conductivities of
0.03 and 0.06 W/m-C, the calculated errors are 0.5 and 0.15 C, respectively. The
magnitude of the rate of blood perfusion was found to have an insignificant effect on the
measured temperatures.29
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Dugay, Murielle. Errors in skin temperature measurements., thesis, December 2008; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc9786/m1/45/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .