Which diet should be offered to a patient who is on furosemide diuretic therapy?

Appeared in: JIPMER Pondicherry NO - 2022

Explanation

Furosemide is a loop diuretic that acts on the loop of Henle in the kidneys.
It causes increased excretion (loss) of potassium, leading to a risk of hypokalemia (low blood potassium).
It also increases the urinary excretion of calcium, which can lead to hypocalcemia (low blood calcium) with long-term use.
Therefore, the diet must compensate for these losses by being high in both potassium and calcium.
Foods rich in potassium include bananas, oranges, spinach, and potatoes. Calcium-rich foods include dairy products, fortified cereals, and leafy greens.

Option A: A high sodium diet is contraindicated. Furosemide is used to remove excess fluid and lower blood pressure; high sodium intake causes fluid retention, counteracting the drug's effect.
Option B: A low potassium diet is dangerous. Furosemide is a potassium-wasting diuretic, and restricting dietary potassium would severely increase the risk of life-threatening hypokalemia.
Option C: A low potassium diet is the primary danger. While high calcium is beneficial, restricting potassium is unsafe for a patient taking furosemide due to the high risk of hypokalemia.

Clinical Relevance

Nursing practice connection: Use the key finding related to Dietary management for a patient on furosemide therapy to guide bedside assessment, documentation, and the next nursing action.
Nurses are responsible for educating patients on diuretic therapy about dietary modifications to prevent life-threatening electrolyte imbalances like hypokalemia, which can cause fatal cardiac arrhythmias.
Monitoring daily weights, intake/output, blood pressure, and electrolyte lab values (especially potassium) is a critical nursing function for patients on furosemide.
What if the patient also has chronic kidney disease (CKD)? In CKD, the ability to excrete potassium is impaired, leading to a risk of hyperkalemia. In this case, a high potassium diet would be dangerous, and the provider would need to carefully balance the diuretic dose with dietary potassium restrictions and possibly prescribe a potassium binder.

How to Approach the Question

First, identify the drug mentioned in the question: Furosemide.
Recall the class of the drug. Furosemide is a loop diuretic.
Remember the primary mechanism and side effects of loop diuretics on electrolytes. They cause the body to lose potassium and calcium.
Analyze the options based on this knowledge. The diet must replace the lost electrolytes.
Eliminate options that are contraindicated (high sodium) or dangerous (low potassium).
Select the option that directly addresses the electrolyte losses caused by the drug: a diet high in both potassium and calcium.

Concept Tested & Keywords

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 1 p. 144-146

E6 Pharmacology Nursing Lilley 11e Part 2 p. 156-158

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