What is the phosphate (24hrs) urine lab test?
A phosphate (24hrs) urine lab test measures the amount of phosphate excreted in urine over a period of 24 hours.
Why is the phosphate (24hrs) urine lab test done?
A phosphate (24hrs) urine lab test is done in order to:
- Diagnose kidney problems,
- Find the cause of a kidney stone,
- Diagnose endocrine disorders,
- Monitor calcium level when other tests show abnormal calcium level.
WHAT DOES THE TEST MEASURE?
A phosphate urine test can determine abnormally high or low phosphorus levels, but it cannot
completely help the doctor in diagnosing the cause. The doctor will need to perform more tests to
determine what’s causing abnormal phosphorus test results.
FREQUENTLY ASKED QUESTIONS:
How is this test performed?
This test is performed on a urine sample.
Is there any risk associated with this test?
There is no risk associated with the test.
What is hyperphosphatemia and what are the reasons?
If the phosphate levels are high in the blood, it may be a sign of:
- Hypoparathyroidism (low levels of parathyroid hormones)
- Heart disease
- Liver disease
- Kidney failure
- Osteoporosis
What is hypophosphatemia and what are the reasons?
If the phosphate levels are low in the blood, it may be a sign of:
- Alcoholism
- Diabetic ketoacidosis (increased acid in the blood)
- Severe burns
- Overuse of diuretics
- Vitamin D deficiency
- Malnutrition
- Hypercalcemia (increased calcium in the blood)
INTERPRETATION OF THE RESULT:
When the results are too high or too low, it's a sign that something's not right. Phosphate concentration
is characterized by a high physiologic variation, depending on age, gender, physiologic state (eg,
pregnancy), and even season (due to the seasonal variation of vitamin D, which is directly involved in the
regulation of phosphate concentration).
Adult: 3.0-4.5 mg/dL