Recently bathing with low concentration radon inhalations become popular in Japan.
However, a few experimental studies have been done on the effect of the radon inhalations. In this study, effect of sublethal dose inhalations of radon on rats were examined. Sprague-Dawley male young rats were exposed to the radon in arerage concentration of 1.43μCi/l daily 6-7hrs for the successive 6-7 days.
Immediately after the last inhalation the distribution of daughter nuclides of radon in various organs were determined. Specific activity of the lung, kidney, spleen liver, small intestine and testis were 41.4, 25.4, 3.47, 3.16, 9.30, and 1.36nCi/g tissue respectively.
20hrs. after the inhalation white blood cell count, red blood cell count, hemoglobin content, serum cholesterol, triglyceride total protein, albumin, total bilirubin, glucose contents and enzyme activities of ALP, GOT, GPT and LDH were determined. Cholesterol content of the inhalation group was higher than that of the control group significantly (P<0.02). In other parameters, there were no significant difference between the inhalation and the control groups.

The Radfango therapy is one of the thermotherapies combined paraffin and peloid therapy. Thermal characteristics of Radfango therapy were examined and compared with those of indirect moxibustion and moxibustion-on-needle therapy. Melted Radfango at 58°C can be applied safely on skin (acupuncture points) and can heat them more strongly than other two therapies. Radfango therapy was applied on several chronic painful diseases with consideration of oriental medicine. These result suggest that Radfango therapy will be available more effectively than other thermotherapies on these diseases.