Test Code UCA24 Calcium, 24 Hour, Urine
Additional Codes
Epic: LAB814
Specimen Required
Specimen Type: Preserved Urine
Collection Container/Type
Preferred: 24-hour urine container
Submission Container/Tube: Clear top (no additive)
Specimen Volume: 3 mL
Collection Instructions:
- Add 6N HCL at the start of collection.
- Collect urine for 24 hours.
- 24-hour volume is required.
- Start and completion date and time is required.
Specimen Minimum Volume
0.5 mL
Specimen Stability
Room temperature: 2 days
Refrigerated: 4 days
Frozen: 3 weeks
Reference Range
100 - 300 mg/24 hours
Rejection Due To
Unlabeled, mislabeled, wrong tube type, QNS, exceeds specimen stability requirements.
Report Available
Same day
Clinical Significance
Calcium ions in serum decrease neuromuscular excitability, participate in blood coagulation, and activate enzymes. As part of the BMP and CMP, abnormal calcium levels lead to other underlying causes. Hypercalcemia may be seen in cancer-especially bone cancer, kidney transplant, tuberculosis, and in hyperthyroid states. Long-term lithium therapy may cause hyperparathyroidism with resulting hypercalcemia. Hypocalcemia can be seen in malabsorption, alcoholism, hypoproteinemia, hypoparathyroidism, and acute pancreatitis. Low dietary intake of calcium, vitamin D deficiency may be other causes.
Method Name
Arsenazo III Dye
Day(s) Performed
Daily