Calcium abnormalities in hospitalized patients

Area of Science:

• Clinical Biochemistry
• Internal Medicine
• Endocrinology

Background:

• Calcium derangements, including hypocalcemia (15%-88%) and hypercalcemia (15%), are prevalent in hospitalized patients.
• Total serum calcium measurements can be inaccurate in acutely ill patients due to variations in albumin levels.
• Ionized calcium measurement offers a more reliable assessment of calcium status in clinical settings.

Purpose of the Study:

• To highlight the importance of accurate calcium measurement in hospitalized patients.
• To outline appropriate management strategies for symptomatic hypocalcemia and hypercalcemia.
• To emphasize the necessity of addressing the root cause of calcium imbalances.

Main Methods:

• Comparison of total serum calcium versus ionized calcium measurements.
• Review of treatment protocols for symptomatic hypocalcemia and hypercalcemia.
• Discussion of common etiologies for hypercalcemia, such as hyperparathyroidism and malignancy.

Main Results:

• Ionized calcium measurement is recommended over total serum calcium to mitigate errors from hypoalbuminemia.
• Symptomatic hypocalcemia necessitates prompt intravenous calcium.
• Symptomatic hypercalcemia requires aggressive hydration and often additional therapies like diuretics, bisphosphonates, or calcitonin.

Conclusions:

• Accurate assessment of calcium levels, preferably via ionized calcium, is vital for hospitalized patients.
• Prompt and appropriate treatment of symptomatic calcium derangements is essential for patient stabilization.
• Long-term management must focus on identifying and treating the underlying cause of the electrolyte abnormality.