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The serum phosphorus test measures the amount of phosphate in the blood.
Alternative NamesPhosphorus - serum; HPO4-2, PO4-3; Inorganic phosphate; Phosphorus blood test
How the test is performedBlood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to a needle. The elastic band is removed from your arm. Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.
In infants or young children, a sharp tool called a lancet may be used to puncture the skin and make it bleed. The blood collects into a small glass tube called a pipette, or onto a slide or test strip. A bandage may be placed over the area if there is any bleeding.
How to prepare for the testThe health care provider may advise you to stop taking drugs that may affect the test.
How the test will feelWhen the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.
Why the test is performedThis test is performed to check the blood level of phosphorus, particularly if you have a disorder known to cause abnormal phosphorus levels.
Normal ValuesNormal values range from 2.4 - 4.1 milligrams per deciliter (mg/dL).
Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What abnormal results meanHigher than normal levels (hyperphosphatemia) may indicate:
- Bone metastasis
- Diabetic ketoacidosis
- Hypocalcemia
- Hypoparathyroidism
- Increased dietary or intravenous (IV) intake of phosphate
- Liver disease
- Renal failure
- Sarcoidosis
- Too much vitamin D
- Use of certain medications such as phosphate-containing laxatives
Lower than normal levels (hypophosphatemia) may indicate:
- Hypercalcemia
- Hyperinsulinism
- Hyperparathyroidism
- Malnutrition
- Too little dietary intake of phosphate or vitamin D, resulting in rickets(childhood) or osteomalacia (adult)
Other conditions under which the test may be performed:
- Multiple endocrine neoplasia (MEN) II
- Secondary hyperparathyroidism
- Tertiary hyperparathyroidism
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight but may include:
- Excessive bleeding
- Fainting or feeling lightheaded
- Hematoma (blood accumulating under the skin)
- Infection (a slight risk any time the skin is broken)
The following can affect phosphorous levels:
- Antacids
- Enemas containing sodium phosphate
- Excess vitamin D supplements
- Glucose through a vein (intravenous)
- Laxatives containing sodium phosphate
- Methicillin
Yu SLA. Disorders of magnesium and phosphorous. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, PA: Saunders Elsevier; 2007:chap 120.
What else can I help you with?
Is serum phosphorus the same as serum phosphate?
Yes, serum phosphorus and serum phosphate are often used interchangeably to refer to the level of inorganic phosphate in the blood. Phosphate is the ionized form of phosphorus.
What is the normal range of serum phosphorus in kids?
What is the normal values of inorganic phosphorus in prepubertal children
How is Phosphorus imbalance observed?
Disorders of phosphate metabolism are assessed by measuring serum or plasma levels of phosphate and calcium
What color tube is used for phosphorus?
Yellow tube (contains acid citrate dextrose solution) is typically used for phosphorus testing.
What is the highest serum phosphorus value recorded?
The highest serum phosphorus values recorded in clinical literature can vary, but extreme cases of hyperphosphatemia have been documented with levels exceeding 25 mg/dL (8.06 mmol/L). Such elevated levels are often associated with severe kidney dysfunction, certain metabolic disorders, or extensive tissue breakdown. It's essential to address the underlying causes to prevent complications related to high phosphorus levels.
17 things that can be found circulating in plasma?
water-calcium-sodium-potassium-phosphorus-bicarbonates-vitamin-hormones-enzymes-nutrients-glucose-fatty acid-amino acid-oxygen-carbon dioxide-serum albumin-serum globumin
What is phosphorus combining capacity?
Phosphorus combining capacity refers to the maximum amount of phosphorus that can be bound to proteins in a specific volume of serum or plasma. It is a measure of the ability of plasma proteins to bind and transport phosphorus in the bloodstream. A higher phosphorus combining capacity may indicate certain medical conditions such as kidney disease or metabolic disorders.
What is lacking antibodies of a specific type in serum?
Serum is serum
Plasma minus clotting proteins?
Plasma minus clotting proteins is called serum. Serum is the liquid portion of blood that remains after blood has clotted and the clotting factors have been removed. Serum is used in various medical tests to measure different components in the blood.
Does serum contain DNA?
Serum is generally free from blood cellular components but when collecting serum sometimes few cells will be pipetted with the serum & that is the only source of DNA in the serum.
How toxity of serum can be tested?
how can you test for any toxity in blood serum or serum tears.
Which tube will yield serum?
A serum separator tube (SST) typically yields serum after centrifugation. It contains a gel barrier that separates the serum from the clot during the centrifugation process, allowing for easy collection of the serum layer.
