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Some Results of Parathyroidectomy of Calves^{1, 2,}

Department of Dairy Husbandry, University of Wisconsin, Madison

ABSTRACT

This was a study of reactions of calves to removal of the internal parathyroids along with the thyroid glands, removal of the external parathyroids, and thyroparathyroidectomy.

When only the internal parathyroids and the thyroid glands or the external parathyroids were removed, there was no tetany and little effect on the serum calcium and plasma inorganic phosphorus. Thyroparathyroidectomy resulted in an abrupt, marked lowering of the serum calcium, a less marked lowering of the inorganic plasma phosphorus, tetany, and death. An elevation of the inorganic plasma phosphorus occurred just prior to death.

¹ Published with the approval of the Director of the Wisconsin Agricultural Experiment Station.

² This study was supported in part by a grant of funds from Babson Bros. Co., Chicago, Illinois.