Uric Acid in Blood
There is very little chance of a problem from
having a blood sample taken from a vein.
- You may get a small bruise at the site. You can lower the chance
of bruising by keeping pressure on the site for several minutes.
rare case, the vein may become swollen after the blood sample is taken. This
problem is called phlebitis. A warm compress can be used several times a day to
- Ongoing bleeding can be a problem for people with
bleeding disorders. Aspirin, warfarin (Coumadin), and other blood-thinning
medicines can make bleeding more likely. If you have bleeding or clotting
problems, or if you take blood-thinning medicine, tell your doctor before your
blood sample is taken.
The blood uric acid test measures the
amount of uric acid in a blood sample.
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.
Results are usually ready in 1 to 2 days.
Uric acid crystals sometimes form in
joints even at levels less than 7 mg/dL, especially in men. This can lead to a
gout attack, even though the uric acid levels are
within the normal range.
Many conditions can change uric acid
levels. Your doctor will talk with you about any abnormal results that may be
related to your symptoms and past health.
What Affects the Test
High uric acid values may be caused
- Individual differences in the way your body
produces or gets rid of uric acid.
- Conditions, such as:
- Kidney disease or kidney
- The increased breakdown of body cells that occurs with some
types of cancer (including
multiple myeloma) or cancer treatments,
sickle cell anemia, or
- Other disorders, such as
preeclampsia, liver disease (cirrhosis),
hypothyroidism, and low blood levels of
- A rare inherited gene disorder called Lesch-Nyhan
- Medicines, such as some
diuretics, vitamin C (ascorbic acid), lower doses of
aspirin (75 to 100 mg daily), niacin, warfarin (such as Coumadin),
cyclosporine, levodopa, tacrolimus, and some medicines used to treat
- Eating foods that are very high in
purines, such as organ meats (liver, brains), red
meats (beef, lamb), game meat (deer, elk), some seafood (sardines, herring,
scallops), and beer.
Low uric acid values may be caused
- Severe liver disease,
Wilson's disease, or some types of
- The syndrome of inappropriate antidiuretic hormone (SIADH),
a condition that causes large amounts of fluid to build up in the
- Not eating enough protein.
- Sulfinpyrazone, large
amounts of aspirin (1,500 mg or more daily), probenecid (such as Probalan), and
allopurinol (such as Zyloprim).