手冷水浸漬が指尖皮膚温ならびに寒冷痛におよぼす影響の季節変動に関する研究
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概要
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Cold water immersion tests on the patients suffering from the vibration disease have been carried out without paying any attention to seasons. In studying cold water immersion test, a method is generally used of measuring the finger tip skin temperature (Ts) by immersing one hand up to the wrist in the cold water at 5℃, 10℃ and 15℃ for ten minutes. It is well-known that there is a seasonal variation in Ts by immersing the middle finger in the ice water at 0℃. It is not yet defined, however, whether there is a seasonal variation of Ts when the immersion tests on the patients suffering from the vibration disease have been carried out by the method mentioned above. Therefore, the seasonal variation of Ts immersed in the cold water was studied by exactly the same method stated above. In order to study the seasonal variation four months were chosen, i.e. August (summer), October (fall), February (winter) and May (spring). Six male persons were the subjects of the investigation. The results obtained might be summarized as follows: A. Ts before immersion 1) Ts before immersion was at the highest in summer and at the lowest in winter, and was closely related to the outdoor temperature. 2) Ts in fall and in spring showed some difference between them in spite of the outdoor temperatures which were almost the same. 3) Namely, Ts in fall which was lower than Ts in spring was rather similar to Ts in winter, where as Ts in spring was similar to Ts in summer. B. Ts during immersion and recovery The same tendency described above was recognized in Ts during and after the immersion. That is to say, the difference in Ts between fall or winter and summer or spring is as follows: 1) The degree of the drop in Ts immediately after the start of the immersion was greater in summer and spring than that in fall and winter. 2) The mean of the finger tip skin temperatures of the immersed finger was higher in summer and spring than that in fall and winter. 3) The lowest Ts during immersion was higher in summer and spring than that in fall and winter and the time taken to show the lowest Ts was shorter, compared with that in fall and winter. 4) The frequency of the appearance of cold-induced vasodilation (CIVD) was higher in summer and spring than that in fall and winter. 5) Recovery of Ts after immersion in summer and spring was more speedy than that in fall and winter. 6) The higher the water temperature, the lower was the frequency of appearance of CIVD and the slower was the recovery of Ts after immersion. Furthermore, the seasonal variations were clearly showen. In addition, cold pains during immersion were felt more strongly in summer and spring than in fall and winter. When the variation in the water temperature is considered, cold pains were felt more strongly the lower the water temperature. Therefore, enough consideration should be given to the variation of seasons and the water temperature in studying the function of the peripheral circulation through the one hand immersion method in the cold water.
- 社団法人日本産業衛生学会の論文
- 1980-01-20