Test Detail

Urinary Total Phosphate

Urinary total phosphate (or urine phosphorus) measures the amount of phosphorus-containing phosphate excreted in a urine sample, typically over a 24-hour period, to assess the body's phosphate homeostasis. This test is important for monitoring kidney function, as kidneys regulate phosphate levels by filtering excess amounts into the urine. Levels can indicate issues like renal phosphate wasting, decreased absorption, or conditions such as hyperparathyroidism, and are used alongside other tests to evaluate bone health, nerve function, and muscle contraction.