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Review

Serum Potassium

In: Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition. Boston: Butterworths; 1990. Chapter 195.
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Review

Serum Potassium

Asghar Rastegar.
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Excerpt

Potassium, a metallic inorganic ion with atomic weight of 39, is the most abundant cation in the body. The vast majority of potassium is in the intracellular compartment with a small amount in the extracellular space. Normal serum potassium is 3.5 to 5.5 mEq/L; however, plasma potassium is 0.5 mEq/L lower. While total body potassium is lower in females and in older patients, serum potassium concentration is independent of sex and age.

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