Sign in →

Test Code LAB20262 Calcium/Creatinine Ratio - 24 Hour Urine

Department

CHEMISTRY

Collection Requirements

24 hour urine.

Calcium tube needs to be acidified after collection.

Primary Collection Container

24 HR Urine container

Transport

Urine refrigerated

Preferred Transport Temperature

Refrigerated

Processing

Keep specimen refrigerated until processing.

Measure total volume.

Seperate into 2 aliquots

Acidify 1 tube (calcium tube) of the urine, with 6N HCl, to a pH of 2-3.

Aliquot, centrifuge and refrigerate, note total volume on the label.

Stability

Ambient: 2 days

Refrigerated: 4 days

Minimum Testing Volume

0.5 mL

Reference Range

Age:

0-12 months

Male:30-810 mg/g

Female:30-810 mg/g

12-24 months

Male:30-560 mg/g

Female:30-560 mg/g

24 months-3 years

Male:20-500 mg/g

Female:20-500 mg/g

3-5 years

Male:20-410 mg/g

Female:20-410 mg/g

5-7 years

Male:10-300 mg/g

Female: 10-300 mg/g

7-10 years

Male: 6-431 mg/g

Female: 11-457 mg/g

10-13 years

Male: 8-300 mg/g

Female: 12-309 mg/g

16-18 years:

Male: 10-264 mg/g

Female: 20-271 mg/g

>18 years

Male: 20-240 mg/g

Female: 20-300 mg/g

Methodology

See the methodology for each component. Roche c503 and e801

Performed

Sunday – Saturday

Reported

As completed

CPT Codes

82340, 82570

Unacceptable Conditions

Calcium: Non-acidified Urine.