Pathology

Test & Collection Guide

Calcium - Urine

Ordering information:

Elevated 24 hour urine calcium may occur due to primary hyperparathyroidism. Low 24 hour urine calcium, where serum calcium is high may be due to familial hypocalciuric hypercalcaemia (FHH). Level is influenced by dietary calcium and supplements. Used in conjunction with the Hammersmith Urine calcium creatinine clearance ratio (not provided).

Laboratory:

Biochemistry

Test Code:

24UCA,CAU

Specimen types:

24 hour Urine

Container types:

24-hour urine - ACID bottle

Collection Instructions:

With restricted Calcium diet, collect specimens for Calcium measurement on days 5 & 6.

Patient Collection Instructions

Frequency:

Daily

Result Turnaround Time:

4 hours

Reference Interval:

Random diet - Male	0.1-7.5	mmol/d
Random diet - Female	0.1-6.2	mmol/d
400 mg calcium daily for 6 days	0.7 - 5.3	mmol/d