Mr. Ramu is on diuretics and Digoxin. His recent Serum Potassium value is 2.9 mEq/l. Which of the undermentioned food items is essentially required for the patient?

Appeared in: SCTIMST Staff Nurse - 2015 (Set-B)

Explanation

The patient's serum potassium is 2.9 mEq/L, which is below the normal range of 3.5-5.0 mEq/L, indicating hypokalemia.
Diuretics are a common cause of potassium loss, leading to hypokalemia.
Hypokalemia potentiates the effect of digoxin, increasing the risk of digoxin toxicity, which can cause serious cardiac arrhythmias.
Oranges are a well-known, excellent dietary source of potassium, making them the most appropriate choice to help correct the patient's low potassium level and mitigate the risk of digoxin toxicity.

Option A: Milk contains some potassium, but it is not considered a high-potassium food. It would not be sufficient to correct a clinically significant low potassium level of 2.9 mEq/L.
Option B: While some green leafy vegetables (like spinach) are good sources of potassium, 'green leafy vegetables' is a broad category. Oranges provide a more reliable and concentrated source of potassium that is commonly recommended for this purpose.
Option D: Whole grain cereals are an excellent source of dietary fiber but are not a significant source of potassium. They would not be effective in raising the patient's serum potassium level.

Clinical Relevance

Nursing practice connection: Knowing Dietary management of drug-induced hypokalemia helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A key nursing responsibility is monitoring for electrolyte imbalances, especially in patients on diuretics and digoxin. Recognizing the signs of hypokalemia and its link to digoxin toxicity is critical for patient safety.
Nurses must educate patients on potassium-wasting diuretics about the importance of including potassium-rich foods in their diet to prevent complications.
What if the patient's potassium level was 5.8 mEq/L (hyperkalemia)? The nurse's action would be the opposite: advise the patient to AVOID potassium-rich foods like oranges and immediately notify the provider, as hyperkalemia also carries significant cardiac risks.

How to Approach the Question

First, identify the key clinical data in the question: the patient's medications (diuretics, Digoxin) and the lab value (Serum K+ 2.9 mEq/l).
Recognize that 2.9 mEq/L is below the normal potassium range (3.5-5.0 mEq/L), indicating hypokalemia.
Recall the major side effects and interactions of the medications. Diuretics often cause potassium loss, and hypokalemia increases the risk of digoxin toxicity.
The goal is to correct the hypokalemia. Evaluate the options based on their potassium content.
Compare the potassium content of the food items. Oranges are widely known as a high-potassium food.
Select the food item that is the best source of potassium to address the patient's immediate need.

Concept Tested & Keywords

Concept Tested: Dietary management of drug-induced hypokalemia.
Stem keywords: diuretics, Digoxin, Serum Potassium, 2.9 mEq/l
Lead-in keywords: essentially required
Clinical cues: Serum Potassium value of 2.9 mEq/l indicates moderate hypokalemia.
Clinical cues: Concurrent use of diuretics and Digoxin signals a high risk for digoxin toxicity if potassium is low.

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E6 Pharmacology Nursing Lilley 11e Part 2 pp. 156-158, 73-75, 74-76

Practise the full SCTIMST Staff Nurse - 2015 (Set-B)

Attempt every question from this paper in a timed mock, then review the full solution for each one.