A provider orders potassium chloride, 20 mEq, orally, once daily.
The nurse knows that the abbreviation mEq stands for which of the following?
A.
Modified equivalents.
B.
Megaequivalents.
C.
Milliequivalents.
D.
Miniequivalents.
The Correct answer and Explanation is:
The correct answer is C. Milliequivalents.
Explanation:
In the context of medication and pharmacology, “mEq” stands for milliequivalents. This unit of measurement is used to express the concentration of electrolytes in a solution, specifically in the context of intravenous (IV) fluids and oral medications. To understand the term “milliequivalent,” it is helpful to first understand the concept of equivalents and milliequivalents in chemistry and medicine.
Equivalents (Eq) refer to the amount of a substance that reacts with or supplies one mole of hydrogen ions (H⁺) in a chemical reaction. In the case of electrolytes, an equivalent is a measure of the amount of an electrolyte that reacts or combines with another substance in a solution. For example, 1 equivalent of potassium (K⁺) is the amount that would react with 1 equivalent of chloride (Cl⁻).
Milliequivalents are simply one-thousandth (1/1000) of an equivalent. The use of milliequivalents (mEq) allows for more precise measurement in clinical settings, where electrolytes are often used in relatively small quantities. For instance, potassium chloride (KCl) might be ordered in milliequivalents to ensure accurate dosing, as electrolytes need to be administered in exact amounts to avoid complications such as electrolyte imbalances.
When a provider orders “20 mEq” of potassium chloride orally, it means they are prescribing a dose that contains 20 milliequivalents of potassium. This precise measurement helps in maintaining electrolyte balance and ensuring proper physiological function. In clinical practice, understanding and accurately using these units is crucial for safe medication administration and effective patient care.
In summary, the abbreviation “mEq” stands for milliequivalents, not modified equivalents, megaequivalents, or miniequivalents. This unit is essential for accurately measuring and administering electrolytes in medical treatments.