Description
Calcium (24 hr urine)
Sample Type:Urine
Tests Included:
Measurement of calcium concentration in a 24-hour urine sample
Sample Required:
Collected urine over a 24-hour period
Test Time:
Results are typically available within a few days.
Test Range Values:
Normal values for 24-hour urinary calcium excretion can vary but usually range from 100 to 300 milligrams per 24 hours (mg/24h).
What is the test?
The Calcium (24-hour Urine) test measures the total amount of calcium excreted in the urine over a 24-hour period, providing insight into calcium metabolism.
Test Procedure:
A 24-hour urine sample is collected, and the concentration of calcium is measured in the laboratory.
When to take the test:
The test is recommended when assessing disorders related to calcium balance, kidney stones, or evaluating bone health.
Who should take the test:
Patients with suspected calcium imbalances, kidney stone formation, or bone disorders might require this test. It’s usually ordered by nephrologists, endocrinologists, or healthcare providers managing bone health.
Precautions for exceptional cases (pregnancy, etc.):
Pregnancy can affect calcium levels. Pregnant individuals should discuss testing procedures with their healthcare provider.
Frequently Asked Questions (FAQs) for Calcium (24-hour Urine) Test:
Q1: How is a 24-hour urine collection for calcium done?
A: It involves collecting all urine passed over 24 hours in a container provided by the lab, starting after the first morning void and including the first morning void on the second day.
Q2: What does high urinary calcium indicate?
A: High urinary calcium levels might suggest hypercalcemia, hyperparathyroidism, certain kidney disorders, or excessive calcium intake.
Q3: Can dietary changes influence 24-hour urinary calcium levels?
A: Yes, dietary changes, especially changes in calcium-rich foods or supplements, can affect urinary calcium excretion.
Q4: What are the implications of low urinary calcium levels?
A: Low urinary calcium levels might indicate hypocalcemia, certain hormonal imbalances, or conditions affecting calcium absorption.
Q5: Can medications impact urinary calcium levels?
A: Certain medications, including diuretics or medications affecting calcium metabolism, might influence urinary calcium levels. Always inform healthcare providers about medications.
*Please note that specific testing protocols and guidelines may vary based on the latest recommendations from health authorities and regulatory agencies. It is essential to consult healthcare professionals and follow local testing guidelines for accurate and appropriate testing.
