It also helps blood clot normally. High levels may mean that you have muscle or kidney conditions, or preeclampsia , a dangerous condition that can happen during pregnancy.
This is a measure related to how your body manages fluids. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your doctor may use this test to check on a medical condition, such as high blood pressure, or to help diagnose a medical condition, such as diabetes. It may be done as part of a workup for a problem, in an emergency situation, before surgery, or as part of a regular checkup.
What are these tests used for? Low levels can mean that you have a kidney condition, poison in your blood, or too much acid in your body acidosis. Manual of Laboratory and Diagnostic Tests, 8th ed. It gives a snapshot of the health of your kidneys, your blood sugar levels, and the levels of key electrolytes, such as potassium and sodium. The test is done with a blood sample.
Does this test pose any risks? A red cell distribution width RDW blood test helps measure variation in red blood cell volume and size. This test may be chosen over the BMP if:.
What you eat and drink can affect the levels of many substances in your blood, and fasting ensures an accurate measurement not affected by food. Health Information.
Be sure your healthcare provider knows about all medicines, herbs, vitamins, and supplements you are taking. Healthwise Staff Medical Review: Test results may vary depending on your age, gender, health history, the method used for the test, and other things.
This information does not replace the advice of a doctor. Related Information Basic Metabolic Panel. This is a byproduct of your kidneys' normal functioning, and levels can tell how well your kidneys are working. What do my test results mean?