Sodium in Blood: About Your Child's Test

Skip Navigation

What is it?

A sodium test checks for how much sodium is in the blood. Sodium helps the body keep the right mix of water and minerals.

Why is this test done?

A sodium blood test is done to:

  • Check on the mix of water and certain minerals in the body.
  • Find the cause of symptoms from low or high levels of sodium.
  • Check on the progress of diseases of the kidneys or adrenal glands.

How do you prepare for the test?

In general, you don't need to do anything to prepare for your child's test. Your doctor may give you some specific instructions.

How is the test done?

A health professional uses a needle to take a blood sample, usually from the arm.

How long does the test take?

The test will take a few minutes.

Follow-up care is a key part of your child's treatment and safety. Be sure to make and go to all appointments, and call your doctor if your child is having problems. Ask your doctor when you can expect to have your child's test results.

Where can you learn more?

Go to https://www.healthwise.net/patientEd

Enter S465 in the search box to learn more about "Sodium in Blood: About Your Child's Test".

The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.