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Calcium, 24-Hour Urine with Creatinine [1635X]
10 mL aliquot of a well-mixed, 24-hour collection
See Urine in Blood, Urine and Stool section of Specimen Collection and Handling
Urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Collect urine with 25 mL of 6N HCl to maintain a pH below 3. It is acceptable to add preservative after collection if urine is refrigerated during collection. Adjust ph to <3.0. Record total volume and collection time on specimen container and requisition.
Refrigerate during and after collection. Do not include first morning specimen; collect all subsequent voidings. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous morning's first voiding.
Plastic screw-cap container
Room temperature: 5 days
Refrigerated: 35 days
Frozen: 6 months
|Quest Diagnostics Nichols Institute|
|14225 Newbrook Drive|
|Chantilly, VA 20153|
Mon-Fri Morning, Evening, Night Sat Morning Sun Morning, Night; Report available: Next day
Oral contraceptive use may depress results. Requires accurate 24-hour urine collection.
Unrestricted Calcium Diet
|Male||55-300 mg/24 h|
|Female||35-250 mg/24 h|
|Male||55-200 mg/24 h|
|Female||35-200 mg/24 h|
|Male||30-210 mg/g creat|
|Female||30-275 mg/g creat|
Creatinine, 24-Hour Urine
|<36 Months||Not established|
|36 Months-8 Years||0.11-0.68 g/24 h|
|9-12 Years||0.17-1.41 g/24 h|
|13-17 Years||0.29-1.87 g/24 h|
|>17 Years||0.63-2.50 g/24 h|
Abnormal levels are found in hyperparathyroidism, hyperthyroidism and Paget's Disease.
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
(The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.)
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.