Pathology Handbook

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24 hour Urine Calcium

Alternative Names:

Timed Urine Calcium

Laboratory:

Clinical Biochemistry

Test Code:

DCA

Medicare rebatable:

Yes

Registration Instructions:

If the request is for both 24-hour urinary creatinine and urinary phosphate (and/or urinary calcium), only one 24-hour acidified bottle is required.

Specimen Types:

Urine 24 hour

Container Types:

Urine Bottle ACID

Adults Volume or Mass:

50 mL

Minimum/Paediatric Volume or Mass:

50 mL

Collection & Request Instructions:

Add 20 mL 6 M HCl to urine bottle (24 hour)

If the request is for both 24-hour urinary creatinine and urinary phosphate (and/or urinary calcium), only one 24-hour acidified bottle is required.

Record start and end date/time of collection on bottle/request form.

Transport Instructions:

Room Temperature

Processing Instructions:

Non-acidified urine collections should be mixed thoroughly by inversion 5 times immediately prior to acidification (prior to analysis). Acidify to pH < 2.

Weight, aliquot and record volume on bottle/request form.

Assay Frequency:

Daily

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