It is critical to the proper functioning of nerve and muscles cells, particularly heart muscle cells. All rights reserved. © 1998-2020 Mayo Foundation for Medical Education and Research (MFMER). Royal Society of Chemistry: “Potassium.”. Your doctor will go over the results with you. Accessed April 5, 2017. The needle is attached to a tube, which collects the blood specimen. As a nutrient, potassium is found in a number of foods. © 2005 - 2019 WebMD LLC. COVID-19 Vaccines: Updates You Need to Know, Sign Up to Receive Our Free Coroanvirus Newsletter, Kidney disease (the most common cause of hyperkalemia). Potassium helps carry electrical signals to cells in your body. Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. 1. Mayo Clinic, Rochester, Minn. Oct. 11, 2017. Depending on the lab, you should get the results back within a few days. Usually, levels under 2.5 mmol/L are considered to be very serious. To make sure of the diagnosis, your doctor might ask you to take a second blood test.
All rights reserved. Philadelphia, Pa.: Saunders Elsevier; 2013. https://www.clinicalkey.com. Your blood potassium level is normally 3.6 to 5.2 millimoles per liter (mmol/L). Either high or low potassium levels can cause heart problems. https://labtestsonline.org/understanding/analytes/potassium/tab/test/. http://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/81390. Positive direct examination from sterile body fluid/site 1) Cerebrospinal fluid 2) Joint fluid 3) Pericardial fluid 4) Pleural fluid 5) Peritoneal fluid b. Normal levels of potassium range from 3.5 mmol/L to 5.1 mmol/L in adults. Advertising revenue supports our not-for-profit mission. Accessed Oct. 4, 2017. FREE book offer – Mayo Clinic Health Letter. Patients who have already been diagnosed with kidney disease or other ailments may take potassium blood tests regularly.

If your potassium level is high (a condition called hyperkalemia) you may have: If your potassium level is low (hypokalemia), you may have: Sometimes, a blood sample may be poorly taken or poorly tested, which can affect the test results. National Kidney Foundation. See how we're providing safe in-person care and virtual visits, Review the latest COVID-19 resources and research advancements, Mayo Clinic College of Medicine and Science, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic School of Continuous Professional Development, Mayo Clinic School of Graduate Medical Education, Leg pain after prolonged standing or sitting. http://www.merckmanuals.com/professional/endocrine_and_metabolic_disorders/electrolyte_disorders/hypokalemia.html. Mount DB, et al. To do a test, a lab tech sticks a needle in a vein and takes a blood sample.

Potassium is a chemical that is critical to the function of nerve and muscle cells, including those in your heart. Hyperkalemia. This site complies with the HONcode standard for trustworthy health information: verify here.

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