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Diseases » Nephrocalcinosis » Diagnosis

Diagnosis of Nephrocalcinosis

Nephrocalcinosis Diagnosis: Book Excerpts

Diagnostic Tests for Nephrocalcinosis: Online Medical Books

16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about diagnostis of Nephrocalcinosis.

Calcium imbalance: Diagnosis
(Professional Guide to Diseases (Eighth Edition))

Confirming diagnosis A serum calcium level less than 8.5 mg/dl confirms hypocalcemia; a level more than 10.5 mg/dl confirms hypercalcemia. (However, because approximately one-half of serum calcium is bound to albumin, changes in serum protein must be considered when interpreting serum calcium levels. A common conversion formula is calcium corrected = calcium actual + 0.8 x [4.0 – albumin level]. Ionized calcium levels are 4.65 to 5.28 mg/dl and are a measure of the fraction of serum calcium in ionized form.)

The Sulkowitch urine test shows increased calcium precipitation in hypercalcemia. In hypocalcemia, an electrocardiogram (ECG) reveals lengthened QT interval, prolonged ST segment, and arrhythmias; in hypercalcemia, shortened QT interval and heart block. (See Diagnosing hypercalcemia, pages 916 and 917.)

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Source: Professional Guide to Diseases (Eighth Edition), 2005

Calcium imbalance: Diagnosis
(Handbook of Diseases)

A serum calcium level below 4.5 mEq/L confirms hypocalcemia; a level above 5.5 mEq/L confirms hypercalcemia. (However, because about half of serum calcium is bound to albumin, changes in serum protein must be considered when interpreting serum calcium levels.)

In patients with hypercalcemia, urine test results show an increase in urine calcium precipitation. In those with hypocalcemia, an electrocardiogram (ECG) reveals a lengthened QT interval, a prolonged ST segment, and arrhythmias; in those with hypercalcemia, an ECG reveals a shortened QT interval and heart block.

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Source: Handbook of Diseases, 2003