NORCET -4 , 2023
Medical & Surgical Nursing
Medium
All of the following given in a patient with potassium toxicity, EXCEPT?
Appeared in: NORCET -4 , 2023
Explanation
- Ipratropium is an anticholinergic bronchodilator primarily used for respiratory conditions like COPD.
- It works by blocking muscarinic receptors and has no known mechanism for lowering serum potassium levels.
- The class of nebulized medications used to treat hyperkalemia are beta-2 agonists (e.g., salbutamol/albuterol), which stimulate the Na-K pump to shift potassium into cells. Ipratropium does not have this effect.
Why Other Options Were Wrong
- Option A: Calcium gluconate is a primary emergency treatment for hyperkalemia.
- Option C: Insulin with dextrose is a key treatment for rapidly lowering serum potassium.
- Option D: Sodium bicarbonate (soda bicarbonate) is a recognized therapy for hyperkalemia, particularly in specific situations.
Related Visual
- Visual 1: Flowchart: Step-wise emergency management of hyperkalemia, showing the roles of cardiac stabilization, intracellular shift, and potassium elimination.
- Visual 2: ECG Strip: Comparison of a normal ECG with one showing classic hyperkalemic changes (peaked T waves, widened QRS, sine wave pattern).
Clinical Relevance
- Nursing practice connection: Knowing Emergency management of hyperkalemia (potassium toxicity) helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
- Hyperkalemia is a medical emergency due to the risk of fatal cardiac arrhythmias. Nurses must be able to recognize ECG changes (e.g., peaked T-waves) and act swiftly.
- The nurse's role includes continuous cardiac monitoring, administering emergency medications as ordered, and monitoring blood glucose closely after insulin administration to prevent hypoglycemia.
- It is crucial to stop all sources of potassium, including IV fluids and dietary intake, once hyperkalemia is identified.
How to Approach the Question
- This is a negatively framed question using the keyword 'EXCEPT'. Your goal is to find the option that does NOT fit.
- Identify the core concept: treatments for potassium toxicity (hyperkalemia).
- Evaluate each option against the known management strategies for hyperkalemia: cardiac membrane stabilization, intracellular potassium shift, and potassium removal.
- Calcium gluconate stabilizes the heart. This is a valid treatment.
- Insulin/dextrose and sodium bicarbonate shift potassium into cells. These are valid treatments.
- Consider Ipratropium. Recall its primary use is as a bronchodilator. It does not fit the mechanisms for treating hyperkalemia. This makes it the outlier.
Concept Tested & Keywords
- Concept Tested: Emergency management of hyperkalemia (potassium toxicity)
- Stem keywords: potassium toxicity, hyperkalemia
- Lead-in keywords: EXCEPT
- Negative lead-in flag: Question is negatively framed and asks for the exception.
Question ID
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Practise the full NORCET -4 , 2023
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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