Phosphate, 24 Hour details
What Phosphate, 24 Hour shows
This test measures the total amount of phosphate passed in your urine over a full 24-hour collection. Phosphate is a mineral essential for bones, teeth and energy use, and your kidneys keep its blood level steady by adjusting how much they excrete. The test helps look at how your body handles phosphate, including in kidney stone workups and bone or parathyroid disorders. Higher amounts can reflect a high-phosphate diet, overactive parathyroid glands or kidney phosphate wasting, while lower amounts can reflect low intake or poor absorption. An incomplete collection affects the result, so it is interpreted with urine creatinine and blood phosphate.
Tests that include Phosphate, 24 Hour
Phosphorus is present in many foods, with a mean intake of approximately 1500 mg per day for adult males and about 1000 mg per day for adult females. Absorbed phosphate, under the influence of parathyroid hormone, is readily excreted in the kidney. Measurement of urinary phosphorus generally reflects dietary intake; hence, day-to-day excretion may show considerable variation.
- Creatinine, 24 Hour Measures the total creatinine passed in a 24-hour urine collection, used to check the collection is complete and to calculate kidney function and other urine results.
- Phosphate, 24 Hour Measures the total phosphate your kidneys excrete in urine over 24 hours, helping assess phosphate balance, kidney handling and kidney stone risk.
- Phosphate/Creatinine Ratio A ratio calculated from urine phosphate and urine creatinine, used to judge phosphate excretion while adjusting for how concentrated the urine is.
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