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Test Code CA24 CALCIUM, 24 HR URINE

Methodology

Colorimetric

Useful for identification of abnormal physiologic states causing excess or suppressed excretion of calcium, such as hyperparathyroidism, vitamin D abnormality, diseases that destroy bone, prostate cancer, and drug treatment, such as thiazide therapy.

Specimen Requirements

Container/Tube: Plastic urine container

Specimen Volume: 10 mL from a well-mixed, 24-hour urine collection

Collection Instructions: No preservative. Refrigerate specimen during collection.

Note: 1. Starting and ending times of collection and total volume are required.

2. Follow instructions in “Urine Collection, 24-Hour” in Special Instructions.

Day(s) Test Set Up

Monday through Friday

Reference Values

100-300 mg/24 hours 

Note: Specimen collected for other than a 24-hour time period are reported in unit of mg/L, for which reference values are not established.

Performing Laboratory

Logan Health Medical Center-Chemistry

Test Classification and CPT Coding

82340

Specimen Transport Temperature

Refrigerate

Special Instructions