Phosphate in Blood
There is very little risk of complications from having blood
drawn from a vein. You may develop a small bruise at the puncture site. You can
reduce the risk of bruising by keeping pressure on the site for several minutes
after the needle is withdrawn.
In rare cases, the vein may become inflamed after the blood
sample is taken. This condition is called phlebitis and is usually treated by
applying a warm compress several times daily.
Continued bleeding can be a problem for people
with bleeding disorders. Aspirin, warfarin (Coumadin), and other blood-thinning
medicines can also make bleeding more likely. If you have bleeding or clotting
problems, or if you take blood-thinning medicine, tell the health professional
before your blood is drawn.
There is very little risk of a serious problem developing from a
heel stick. A small bruise may develop at the puncture site.
Continued bleeding can be a problem for babies with bleeding
disorders. There is a possibility that a bleeding problem may be discovered
while collecting the blood for this test.
A phosphate test measures the amount of
phosphate in a blood sample. Phosphate is a charged
particle (ion) that contains the
mineral phosphorus. Phosphate levels are usually
higher in children than in adults because of the active bone growth occurring
Results are usually available in 1 to 2 hours.
The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.
High phosphate levels may be caused by:
Low phosphate levels may be caused by:
Hyperparathyroidism, certain bone diseases (such as
osteomalacia), lack of vitamin D, or
some kidney or liver diseases.
- Severe malnutrition or
- A condition such as
sprue that prevents the intestines from absorbing
- High calcium
- Some types of tumors.
What Affects the Test
Results from a blood phosphate test may be affected by:
- Using some medicines that can decrease phosphate
levels, such as acetazolamide and epinephrine. A large
infusion of sugar (glucose) that causes insulin levels to increase can also
decrease phosphate levels.