A convenient and efficient method is developed for the trapping of water in exhaled air. A bent-V-shaped glass sampling tube was immersed in iced water and exhaled air was introduced into the tube through a plastic straw. The trapping efficiency of exhaled water was equivalent to those with more complex and troublesome methods. Using anywhere available ice, the water in exhaled air can be readily collected with this method and the tritium level in the body will be quickly obtained.
Accumulation of67Gain gut was evaluated in67Gascintigraphy retrospectively in 30 patients (32 examinations) . TIBC and UIBC were examined in all patients on the day when their scintigraphies were performed. Blood transfusion or Fe administration 2 months before67Gascintigraphies were not carried out in any patients. Fifty percents (6/12) of male, and 40% (8/20) of female patients showed67Gaaccumulation in gut. There was significant correlation between67Gaaccumulation in gut and low ion-saturation ratio for transferrin. Excretion of67Gabound with transferrin from liver was thought to be an important factor of67Gaaccumulation in gut.