The effect of using different regions of interest on local and mean skin temperature

Abstract

The dynamic nature of tissue temperature and the subcutaneous properties, such as blood flow, fatness, and metabolic rate, leads to variation in local skin temperature. Therefore, we investigated the effects of using multiple regions of interest when calculating weighted mean skin temperature from four local sites. Twenty-six healthy males completed a single trial in a thermonetural laboratory (mean ± SD): 24.0 (1.2)°C; 56 (8%) relative humidity; <0.1 m/s air speed). Mean skin temperature was calculated from four local sites (neck, scapula, hand and shin) in accordance with International Standards using digital infrared thermography. A 50 mm × 50 mm, defined by strips of aluminium tape, created six unique regions of interest, top left quadrant, top right quadrant, bottom left quadrant, bottom right quadrant, centre quadrant and the entire region of interest, at each of the local sites. The largest potential error in weighted mean skin temperature was calculated using a combination of a) the coolest and b) the warmest regions of interest at each of the local sites. Significant differences between the six regions interest were observed at the neck (P<0.01), scapula (P<0.001) and shin (P<0.05); but not at the hand (P = 0.482). The largest difference (± SEM) at each site was as follows: neck 0.2 (0.1)°C; scapula 0.2 (0.0)°C; shin 0.1 (0.0)°C and hand 0.1 (0.1)°C. The largest potential error (mean ± SD) in weighted mean skin temperature was 0.4 (0.1)°C (P<0.001) and the associated 95% limits of agreement for these differences was 0.2-0.5 °C. Although we observed differences in local and mean skin temperature based on the region of interest employed, these differences were minimal and are not considered physiologically meaningful.

Mathematical Model for Localised and Surface Heat Flux of the Human Body Obtained from Measurements Performed with a Calorimetry Minisensor

“…To focus mainly on the sensor’s operation, two series of representative measurements are presented. These measurements were performed on the hand because it is one of the regions of interest for the thermal measurement of the body surface [ 23 ] and also for ease of measurement.…”

pH-Dependent Expression, Stability, and Activity ofMalassezia restrictaMrLip5 Lipase

“…3B). In addition to pH, we also investigated the effect of temperature on MrLip5 expression, as this parameter is considered to be a critical environmental factor influencing skin physiology 45 . M. restricta KCTC 27527 cells were grown at 34 o C and 37 o C in media with different pH levels, and expression of MrLip5 was evaluated by western blot analysis.…”

Use of optical skin phantoms for preclinical evaluation of laser efficiency for skin lesion therapy

“…Optical skin phantoms were treated by pulsed laser radiation. Subsequent thermographic imaging [29][30][31][32][33][34] of the irradiated area was used to measure the temporal profiles during and after the irradiation. The laser-pulse parameters were varied to determine the optimal values for tissue irradiation which would provide best results of therapy.…”