OVERVIEW:
A sodium blood test is a routine test that allows the doctor to see how much sodium is in the blood. It’s
also called a serum sodium test. Sodium is an essential mineral to the body.
Sodium is particularly important for nerve and muscle function. The body keeps sodium in balance
through a variety of mechanisms. Sodium gets into the blood through food and drink. It leaves the blood
through urine, stool, and sweat. Having the right amount of sodium is important for health.
FREQUENTLY ASKED QUESTIONS
How is this test performed?
This test is performed on a blood sample. The blood is obtained from the vein and this is performed by a
health care providers in the following way.
- clean the skin
- put an elastic band above the area
- insert a needle into a vein (usually in the arm inside of the elbow or on the back of the hand)
- pull the blood sample into a vial or syringe
- take off the elastic band and remove the needle from the vein
What are the risks associated with this test?
There is no significant risk associated with this test. A small bruise or mild soreness around the blood
test site is common and can last for a few days. Get medical care if the discomfort gets worse or lasts
longer.
Is there any preparation required before the test?
No preparation required before this test.
INTERPRETATION OF THE RESULT
Normally, the amount of sodium in the blood is 135 to 145 mEq/L (milliequivalents per liter)
Higher than normal levels may be due to the following reasons:
- Diet high in sodium
- Disorder of the adrenal glands
- Vomiting
- Use of water pills
- Hypothyroidism decreased activity of thyroid gland
Lower than normal levels may be due to the following reasons:
- Dehydration
- Diarrhea
- Kidney problems
WHY GET TESTED?
Sodium is a very important electrolyte and is responsible for acid-base balance, neuromuscular function,
etc. You may need a sodium urine test if you have one of the following:
- Sodium fluid test is a part of the metabolic panel
- Acute kidney failure
- Abnormally high sodium blood level
- High sodium diet
- Adrenal gland disorder
