The Concentration of Artificial CO2 Warm Water Bathing and the Skin Blood Flow
- Author:
Masaharu MAEDA
;
Hiroshi NAGASAWA
;
Shinobu SHIMIZU
;
Koji YORIZUMI
;
Katsura TANAKA
- Publication Type:Journal Article
- Keywords:
CO2 bathing;
Skin blood flow;
CO2 concentration
- From:The Journal of The Japanese Society of Balneology, Climatology and Physical Medicine
2003;66(3):180-184
- CountryJapan
- Language:English
-
Abstract:
A comparative study was made on bathing-induced changes in body temperature, blood pressure, pulse rate and tissue blood flow of 12 healthy adults using tap water and artificial CO2 water at 37°C to clarify the physiological effects of CO2 at various concentrations of 0, 100, 300, 600, 800 and 1000ppm. There was no change in body temperature during bathing in either water, whereas blood pressure and pulse rate were similarly decreased during bathing, but either of these decreases was not significantly different between tap water and CO2-water. Therefore, it seemed that the decrease in blood pressure due to vasodilation during bathing would be controlled through some regulatory system like autonomic nerve system not so as to result in too much decrease. But, tissue blood flow was more increased during bathing in CO2-water than tap water, suggesting that blood circulation in the tissue near skin surface would have been more enhanced by bathing in hot CO2-water, resulting in a decrease of blood pressure.
Since the increase in tissue blood flow during bathing was dependent on the concentration of CO2, it seemed that an improvement of tissue circulation and metabolism would have resulted from venous return increase associated to venous dilatation, one of dose-dependent CO2 effects.
