20 mEq (mmol) of potassium chloride in 500 ml of 5% dextrose solution is given intravenously to treat?
**Core Concept:** Hypokalemia is a medical condition where the potassium levels in the blood are too low (hypokalemia), which can lead to muscle weakness, cardiac arrhythmias, and other complications. Potassium chloride is a medication used to increase potassium levels in the blood.
**Why the Correct Answer is Right:** Potassium chloride is used to treat hypokalemia (low potassium levels) by increasing potassium levels in the blood. In this multiple-choice question, we are asked to identify the condition treated with 20 mEq (millimoles) of potassium chloride in a 500 ml 5% dextrose solution given intravenously.
**Why Each Wrong Option is Incorrect:**
A. Hyperkalemia (high potassium levels): Potassium chloride is used to treat hypokalemia, not hyperkalemia, which is caused by high potassium levels in the blood.
B. Acidosis: Potassium chloride is used to treat hypokalemia, not acidosis which is a condition characterized by an excess of hydrogen ions in the blood, leading to a decrease in pH.
C. Hypovolemia (low blood volume): Potassium chloride is used to treat hypokalemia, not hypovolemia, which is a condition characterized by low blood volume.
D. Hypocalcemia (low calcium levels): Potassium chloride is used to treat hypokalemia, not hypocalcemia, which is a condition characterized by low calcium levels in the blood.
**Clinical Pearl:** It is essential for medical students and physicians to understand the correct indications for administering potassium chloride and to be aware of potential complications such as hypokalemia-induced hyperkalemia. This knowledge is vital in making appropriate treatment decisions and preventing adverse effects resulting from incorrect medication use.
**Correct Answer:** D. Hypokalemia (low potassium levels): Potassium chloride is used to treat hypokalemia, the condition where potassium levels in the blood are too low, resulting in muscle weakness and other complications. In this case, the 20 mEq potassium chloride in a 500 ml 5% dextrose solution is given intravenously to increase potassium levels in the blood and treat hypokalemia.