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Kidney Stones

Update in Diagnosis and Management

Laboratory Evaluation

Slide 6

February 2010

The laboratory workup of patients with stones includes a baseline assessment of blood electrolytes and renal function. Low serum bicarbonate can indicate renal tubular acidosis or diarrhea, which can each contribute to stones. Baseline creatinine and potassium are important for drug choice and to monitor after initiation of therapy, especially if thiazides or potassium citrate are under consideration. Looking for hypercalcemia is an important screen for hyperparathyroidism, while hyperuricemia if present might make allopurinol a good treatment choice, especially if the patient also has gout.

Laboratory Evaluation


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