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Blood Sciences

Blood Test Information

Calcium Excretion Index
(a.k.a CEI, CaE)

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Special instructions
This test requires paired (i.e. taken on the same day) FASTING SERUM (yellow top tube) and URINE samples. Please collect the SECOND URINE of the day. The patient may drink water.
For any queries please telephone RUH ex 4711/4713/4715

Reference Range
CEI ≥22 : Probable hyperparathyroidism, familial hypercalcaemic hypocalciuria excluded.
CEI <22 : Results suggest benign familial hypercalcaemic hypocalciuria.
Please note this only applies if the patient is hypercalcaemic.

Units
Ámol/L glomerular filtrate

Turnaround Time
2 days

Department: Biochemistry

Clinical Application
This test may be ordered as an alternative to 24h urine calcium analysis to distinguish between hypercalcaemia caused by primary hyperparathyroidism and benign familial hypercalcaemic hypocalciuria.

 
 

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