The patient is receiving bumetanide (Bumex) and asks the nurse, "What is all this about 'loops' in my medicine?" What is the best response by the nurse?
1. "This medication reabsorbs potassium in the loop of Henle in your kidney. It is safer than other diuretics."
2. "This is a loop diuretic, which means it works in the proximal loop of your kidney. Not all diuretics work the same way."
3. "This is a loop diuretic, which refers to where it acts in your kidney. Not all diuretics work the same way."
4. "This medication blocks sodium reabsorption in what is known as Bowman's capsule. Not all diuretics work the same way."
Correct Answer: 3
Rationale: Bumetanide (Bumex) is called a loop diuretic because it acts by preventing the reabsorption of sodium in the loop of Henle. Bumetanide (Bumex) blocks reabsorption of sodium in the loop of Henle, not in Bowman's capsule. Bumetanide (Bumex) is a potassium-excreting drug; it does not reabsorb potassium. Bumetanide (Bumex) works in the loop of Henle, not the proximal loop.
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