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Establishment of the experimental conditions for inducing saccular cerebral aneurysms in primates with special reference to hypertension

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Summary

To find out the optimum experimental conditions for the induction of saccular cerebral aneurysms in primates, various procedures for inducing renal hypertension were used in cynomolgous monkeys treated with ligation of unilateral carotid artery and betaamino-propionitrile feeding.

Animals were divided into four groups. In the first group, both kidneys were simultaneously compressed with a figure-eight ligation. In the second group, the kidneys were ligated at an interval of one week. In the third and fourth groups, posterior branches of both renal arteries were ligated at the same time, or at an interval of one week, respectively. Hypertension about 200 mmHg was produced only in the last group and aneurysms were noted in more than half of these hypertensive animals.

The best procedure for renal hypertension to induce cerebral aneurysms was proved to be ligation of the posterior branches of both renal arteries at an interval of one week. We can conclude that lasting severe hypertension is essential for inducing cerebral aneurysms in monkeys.

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Kim, C., Kikuchi, H., Hashimoto, N. et al. Establishment of the experimental conditions for inducing saccular cerebral aneurysms in primates with special reference to hypertension. Acta neurochir 96, 132–136 (1989). https://doi.org/10.1007/BF01456172

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