바닥의 온도가 심부온도, 피부온도, 혈류량에 미치는 영향

Abstract

A total of 24 S-D (Sprague-Dawley) rats were purchased, and they were cultured in thermo-neutral environment of 23℃ air temperature and 50% relative humidity. Six (6) types of under floor heating systems were constructed to maintain the floor temperature (t_f) of 12°, 18°, 23°, 28°, 33° and 40℃. In an experimental day, eight (8) rats were chosen sequentially and their body condition was controlled in the 23℃ floor for 20 minutes to get a similar body status, and in the main experiments two floors were selected among six floor systems, and four (4) rats were investigated in each floor. The changes of core body temperature in the rectum and skin temperature in the dorsal part were measured for 60 minutes. After the measurement of body temperature, the blood flow rates were measured in the same dorsal part for 10 minutes by using the Laser Doppler Flow Meter. As the results of the experiments, the rectal temperature was decreased by −2.12℃ in the t_f 12℃, and it was increased by +1.63℃ in the t_f 40℃. From t_f 18℃ to t_f 35℃, the difference of rectal temperature was not statistically significant. The difference between the initial and final skin temperature was not statistically significant in the t_f 23℃ floor, and the skin temperature was decreased at the t_f 12℃ and t_f 18℃ floor, and it was increased from t_f 28℃ to t_f 40℃ statistically. The blood flow rate was not increased proportionally according to the floor surface temperature, In the cooled floors such as t_f 12℃ and t_f 18℃ floor, the blood flow was higher than that of t_f 23℃ to t_f 40℃ floors (p<0.05). The difference of blood flow rate ranged from t_f 23℃ to t_f 40℃ floor was not statistically significant.