Hypercalcemia: causes, symptoms and treatment
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Questions and Answers

A patient with hypercalcemia is prescribed calcitonin. What is the expected outcome of this medication?

  • Promotion of bone breakdown to release more calcium into the bloodstream.
  • Inhibition of calcium excretion through the kidneys.
  • Increased calcium absorption in the GI tract.
  • Decreased calcium levels in the blood by promoting calcium reabsorption into the bones. (correct)

A patient with bone cancer develops hypercalcemia. Which mechanism primarily contributes to elevated calcium levels in this scenario?

  • Increased calcium absorption in the GI tract due to the cancer.
  • Decreased calcium excretion by the kidneys caused by the cancer.
  • Increased production of calcitonin by the tumor cells.
  • Enhanced bone resorption releasing calcium into the bloodstream. (correct)

Why does hypercalcemia lead to polyuria and polydipsia?

  • Elevated calcium reduces the kidney's ability to concentrate urine, resulting in fluid loss and increased thirst.
  • Increased serum calcium causes the kidneys to retain more water, leading to increased thirst and urination.
  • Hypercalcemia directly stimulates the thirst center in the brain, causing increased fluid intake and urination.
  • High calcium levels act as a diuretic, pulling water into the intravascular space and increasing kidney filtration. (correct)

A patient with hyperparathyroidism is likely to experience which of the following electrolyte imbalances?

<p>Hypercalcemia due to excessive parathyroid hormone secretion (C)</p> Signup and view all the answers

A patient's serum calcium level is 13.0 mg/dL. Which of the following clinical manifestations would the nurse expect to observe?

<p>Muscle weakness and constipation (A)</p> Signup and view all the answers

Why is 0.9% sodium chloride IV administered to patients with hypercalcemia?

<p>To dilute the serum calcium levels. (A)</p> Signup and view all the answers

Which medication should be discontinued in a patient experiencing hypercalcemia?

<p>Thiazide diuretics (C)</p> Signup and view all the answers

A dehydrated patient is found to have hypercalcemia. What is the relationship between dehydration and hypercalcemia?

<p>Dehydration leads to hemoconcentration, artificially elevating calcium levels. (B)</p> Signup and view all the answers

Flashcards

Hypercalcemia

High calcium levels in the blood (above 10.5 mg/dL).

Increased Calcium Absorption

Excessive oral intake of calcium and vitamin D.

Decreased Calcium Excretion

Some diuretics help reabsorb calcium in the kidneys, preventing excretion.

Bone Resorption

Process of bone breaking down, releasing calcium into the blood.

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Parathyroid Hormone (PTH)

Hormone that increases serum calcium by breaking down bone.

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Hormone Imbalance in Hypercalcemia

High parathyroid hormone and low calcitonin both contribute to high serum calcium levels.

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Polyuria in Hypercalcemia

Excessive calcium pulls water into the blood, leading to increased urination.

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IV Saline for Hypercalcemia

Administering IV saline helps dilute the high serum calcium levels.

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