Test/Investigation
Calcium & Phosphate (Urine)
Site(s) or Laboratory offering Test/Investigation
NNUH, QEH, JPUH
Units
mmol/24h
Comments/Precautions
Acid container required
Sample type
24-Hour urine collection bottle (acid preservative)
Turnaround times (TAT) Urgent/Routine/GP or OPD
24-hr urine calcium: Within 4 hours/8 hours 24-hr urine phosphate: At least once weekly
Reference intervals (adult unless stated)
Urine calcium excretion: 2.5 – 7.5 mmol/24h
Urine phosphate excretion: 15 – 50 mmol/24h
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