Health Questions and Answers

Archive for the 'Calcium, Phosphate, and Magnesium Metabolism' Category

Question: What are Trousseau’s and Chvostek’s signs?

Monday, December 17th, 2007

Answer: Both are indications of the latent tetany caused by hypocalcemia. Of the two signs, Trousseau’s is more specific and reliable. Trousseau’s sign: A sphygmomanometer is placed on the arm and inflated to greater than systolic blood pressure and left in place for at least 2 minutes. A positive response is carpal spasm of the […]

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Question: What factors affect renal calcium excretion?

Saturday, December 15th, 2007

Answer: With some exceptions, renal calcium handling varies directly with renal Na+ handling. Therefore, renal calcium excretion is increased by saline diuresis, loop diuretics, and volume expansion. In contrast, renal calcium excretion is decreased in volume depletion and other states associated with renal salt retention. One notable exception to this general rule is that the […]

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