Purpose of the Test:

Measures the total amount of phosphate (contains the mineral phosphorus) excreted in urine over a full 24-hour period.

Helps evaluate the body's phosphate balance, which is tightly controlled by the kidneys, intestines, Parathyroid Hormone (PTH), and Vitamin D.

Used to investigate the cause of abnormal phosphate levels in the blood (hypophosphatemia or hyperphosphatemia).

Aids in the diagnosis of kidney disorders, parathyroid gland disorders (hyperparathyroidism, hypoparathyroidism), and kidney stone formation.

Often ordered along with serum phosphate, calcium, and creatinine tests.

Purpose of the Test

Measures the total amount of potassium excreted in the urine over a 24-hour period.

Essential for assessing the body's potassium balance and evaluating the ability of the kidneys to regulate potassium.

Used to distinguish between renal (kidney-related) and non-renal (e.g., gastrointestinal or dietary) causes of abnormal blood potassium levels (hypokalemia or hyperkalemia).

Helps in the diagnosis of adrenal gland disorders (e.g., primary aldosteronism) and to monitor patients on certain medications, particularly diuretics.

Purpose of the Test:
Measures the total amount of uric acid excreted in the urine over a full 24-hour period.1
Primary Use: To investigate and manage patients with gout and to determine the risk factors for uric acid kidney stones
Helps classify gout as an overproduction (high excretion) or under-excretion (low excretion) disorder.
The test result reflects the combination of dietary purine intake and the body's natural production and clearance of uric acid.