CALCIUM,URINE 24 HOUR

Code
500.1550
Name
CALCIUM,URINE 24 HOUR
Category
None
Department
Chemistry
Start Date
Expiration Date
Synonyms
24 Hr Urine CA; 24 Hr Urine Calcium
CPT Codes
82340, 81050
Site
Main Lab
Reference Test
ATLAS Test Code

CA24

Specimen Information

Type

24 HR Urine Container Acidify with 6N HCL (will be done by laboratory)

Volume

Entire 24 hour specimen or 10 ml aliquot (Indicate total volume on aliquot container)

Transport Info

Room Temperature 2 day stability Refrigerated 4 day stability Frozen 3 week stability

Fasting Required?
False
Patient Instructions

Reference Range

Female <250 mg/24hr Male <300 mg/24hr

Methodology

Ion-selective Electrode (ISE)

Clinical Significance

Used in the diagnosis and treatment of parathyroid disease, a variety of bone diseases, chronic renal disease, and tetany (intermittent muscular contractions or spasms). The main significance in determining urinary calcium lies in the differentiation between hypercalciuria and hypocalciuria and the differential diagnosis of nephrolithiasis.

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