著者

北村 勇 柴田 俊郎

出版者

一般社団法人 日本温泉気候物理医学会

雑誌

日本温泉気候学会雑誌 (ISSN:03694240)

巻号頁・発行日

vol.22, no.2, pp.97-119, 1958-09-25 (Released:2010-08-06)

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The problem of water and electrolyte metabolism, an essential regulation in the living body of its internal environment, has been investigated by many researchers. In this paper, we have summarized our study concerned with the effects of thermal bath (plain water or hot spring) on the water and electrolyte metabolism. Also, some related changes in circulatory and endocrine systems were considered.Twelve young men were selected and series of comparative study before and after each bathing for 10 minutes duration at temperature of 40 to 43°C have been performed.I Water and electrolyte metabolism(1) Immediately after the bathing no change was observed in the total body water. The extracellular fluid and the plasma volume increased; hematocrit values were lowered, while the total blood water as well as the plasma water was both increased and the water content of blood corpuscles was decreased. This result was inferred to a replacement of body water from inside to outside of the cells.(2) The minute volume of urine voided immediately after the bathing showed a transient increase, whereas it was decreased after the period of bath and also less than the pre-bathing stage.(3) Plasma Na was lowered after the bathing, while K and Cl remained unchanged. Na content of blood corpuscles showed a rise and K was lowered. The same tendency has also been observed in the skeletal muscle.(4) Reabsorption of Na as well as excretion of K in the urine was slightly increased after the bathing.(5) There was a loss of electrolytes into sweat.(6) The permeability of Na24 across the capillary wall was increased during and immediately after the bathing.II Changes in circulatory and endocrine systems related with water and electrolyte metabolismAmong many changes induced by thermal bathing which may cause alteration in circulatory and endocrine systems, a rise of body temperature and an induced hyperfunction of adrenal glands were considered to play a major role in the whole processes.