To elucidate compositional changes of the rami of the internal iliac artery with aging, the authors investigated age-related changes of the calcium content in the uterine, internal pudendal, umbilical, and obturator arteries by inductively coupled plasma-atomic emission spectrometry. After an ordinary dissection was finished, the uterine, internal pudendal, umbilical, and obturator arteries were resected from 10 female subjects, and the internal pudendal, umbilical, and obturator arteries were resected from 10 male subjects. The female subjects ranged in age from 52 to 96 yr, and the male subjects ranged in age from 63 to 88 yr. The calcium content in the uterine artery began to increase in the seventies and increased markedly in the nineties. In the internal pudendal artery, the calcium content hardly increased up to the eighties and increased significantly in the nineties. In contrast, the calcium content did not change in both the umbilical and obturator arteries with advancing age. It was found that the average content of calcium was the highest in the uterine artery and decreased in the order internal pudendal, umbilical, and obturator arteries. The average content of calcium in the uterine arteries corresponded to 46-fold the amount of the women's obturator arteries, in which it was the lowest. In the cases of men, the average content of calcium was higher in the order of the internal pudendal, umbilical, and obturator arteries. Regarding the average content of calcium, the order internal pudendal, umbilical, and obturator arteries of the men was consistent with that of the women.
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