Calcium, 24Hr, Ur w/Creatinine

Test ID: 

702809

CPT code:

82340, 82570

Clinical Use:

A random urine calcium:creatinine ratio is used to screen for hypercalciuria, as it is found to have a good correlation with 24-hour urine calcium excretion.1 Increased urinary excretion of calcium accompanies hyperparathyroidism, vitamin D intoxication, diseases that destroy bone (such as multiple myeloma), metastasis from prostatic cancer, and following calcium supplementation. Urine calcium is increased with immobilization, with steroid therapy, with Paget disease, and in primary (idiopathic) hypercalciuria.

Specimen Type:

Urine (random)

Container Type: 

Use random transport tube or urine Monovette® with pH stabilizer. Monovette® instructions accompany units.

Collection:

Collect urine and transfer to a random urine transport tube or urine Monovette® with pH stabilizer. Final pH must be <2.

Storage Instructions:

After collection, pH is adjusted to 1.5−2.0 with 6N HCl. Refrigerate.
Stability Requirements
Temperature Period
Room temperature 7 days
Refrigerated 14 days
Frozen 7 days
Freeze/thaw cycles Stable x3

Rejection Criteria

Improperly labeled specimen

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