Potassium (K) in Blood
What Affects the Test
Reasons you may not be able to
have the test or why the results may not be helpful include:
What To Think About
- Low blood potassium values are more common than
high blood potassium values.
electrocardiogram (EKG or ECG) may show signs of a
very high or very low blood potassium level because of the effect potassium has
on the heart. For more information, see the topic
- Other electrolyte tests, such as sodium, calcium, chloride,
magnesium, phosphate, blood urea nitrogen (BUN), and creatinine, are often done
at the same time as a test for potassium. For more information, see the topics
Sodium (Na) in Blood,
Calcium (Ca) in Blood,
Blood Urea Nitrogen, and
Creatinine and Creatinine Clearance.
Other Works Consulted
Chernecky CC, Berger BJ (2008). Laboratory Tests and Diagnostic Procedures, 5th ed. St. Louis:
Fischbach FT, Dunning MB III, eds. (2009).
Manual of Laboratory and Diagnostic Tests, 8th ed.
Philadelphia: Lippincott Williams and Wilkins.
Pagana KD, Pagana TJ (2010). Mosby’s Manual of Diagnostic and Laboratory Tests, 4th ed. St. Louis: Mosby Elsevier.
Primary Medical Reviewer
||E. Gregory Thompson, MD - Internal Medicine
Specialist Medical Reviewer
||Avery L. Seifert, MD - Urology
||September 1, 2010
WebMD Medical Reference from Healthwise
September 01, 2010
This information is not intended to replace the advice of a doctor.
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