A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Calcium, 24 Hour, Urine

Test Code
UCA24


Alias/See Also
Epic: LAB371


Preferred Specimen

Specimen Type: Urine
Collection Container: 24 hour collection kit
Specimen Volume: 3 mL




Minimum Volume

0.5 mL




Instructions
  1. Add 6N HCL at the start of collection.
  2. Collect urine for 24 hours.
  3. Refrigerated specimen with 4 hours of complettion of 24-hour collection
  4. Total volume, start and completion date are required
  5. Patient 24 Hour Collection Instructions


Processing 24-hour urine specimens

  1. Measure the total volume of the specimen.
  2. Mix the specimen well.
  3. Order 24URN in Soft and enter prompted information.
  4. Aliquot/transfer at least 3 mL specimen into plastic clear top (no additive) vacutainer tube.
  5. IL 24-hour Urine Pre-Analytical Processing Job Aid


Transport Container
Clear top (no additive) tube

Do not send the 24 hour collection kit/jug to the lab


Specimen Stability

Room temperature: 2 days
Refrigerated: 4 days
Frozen: 3 weeks




Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Unlabeled, mislabeled, wrong tube type, QNS, exceeds specimen stability requirements.




Methodology

Arsenazo III Dye



Setup Schedule

Daily




Report Available

Same day




Reference Range
100 - 300 mg/24 hours


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.


Performing Laboratory

Inova Laboratories

2832 Juniper Street

Fairfax, VA 22031




Last Updated: April 19, 2023
Last Review: N. Wolford, April 19, 2023


The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.