A pediatrician prescribes an intravenous (IV) solution of 5% dextrose and half-normal saline (0.45%) with 40 mEq of potassium chloride for a child with hypotonic dehydration. Which priority assessment must the nurse perform before administering this IV prescription?

1. A

   Obtain a weight

2. B

   Take the temperature

3. C

   Take the blood pressure

4. D

   Check the amount of urine output

Appeared in: NORCERT 8 Mains-2025

Explanation

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• The priority is to confirm adequate kidney function before administering potassium, an electrolyte primarily excreted by the kidneys.
• Dehydration can impair renal perfusion, leading to decreased urine output (oliguria) or no urine output (anuria).
• Administering potassium to a patient with poor renal function can cause a rapid, life-threatening buildup of potassium in the blood (hyperkalemia).
• Hyperkalemia can lead to fatal cardiac dysrhythmias.
• Checking for adequate urine output is the most direct bedside assessment of renal function, making it the priority. This follows the critical safety principle: "No Pee, No K.".

Why Other Options Were Wrong

• Option A: Obtaining a weight is essential for calculating the total fluid deficit and monitoring the effectiveness of rehydration over time, but it does not assess the immediate safety of administering potassium.
• Option B: Taking the temperature is a routine vital sign assessment to check for fever or hypothermia but has no direct bearing on the kidney's ability to excrete potassium.
• Option C: While important for assessing hemodynamic stability and the degree of shock from dehydration, blood pressure is not as direct an indicator of renal excretory function as urine output is.

Related Visual

• Visual 1: Flowchart: Decision-making process for administering IV potassium, highlighting the 'Check Urine Output' step as a critical gate.
• Visual 2: Infographic: Signs and symptoms of hyperkalemia, including ECG changes (peaked T waves), muscle weakness, and arrhythmias.
• Visual 3: Diagram: Illustrating the effect of dehydration on renal blood flow and glomerular filtration rate.

Clinical Relevance

• Nursing practice connection: Knowing Priority nursing assessment for IV potassium administration in pediatric dehydration helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
• The 'No Pee, No K' rule is a non-negotiable patient safety standard in nursing, especially in pediatrics, where fluid and electrolyte balance is delicate.
• Failure to verify renal function before giving potassium can have fatal consequences. This is a frequent topic of litigation and a core competency for safe nursing practice.
• What if the child had already voided an adequate amount of urine (e.g., greater than 1-2 mL/kg/hr)? In that case, the nurse could safely proceed with administering the prescribed IV solution, as adequate urine output confirms sufficient renal function to handle the potassium load.

How to Approach the Question

• First, identify the key components of the question: a child, dehydration, and an IV order containing potassium chloride.
• Recognize that the question asks for the 'priority assessment.' This means you must determine the most immediate and critical check required for patient safety.
• Focus on the drug being administered: potassium chloride. Recall the primary route of excretion for potassium (the kidneys) and its most dangerous side effect (hyperkalemia leading to cardiac arrest).
• Connect the drug's risk to the patient's condition. Dehydration can impair kidney function.
• Evaluate the options based on which one directly assesses the function of the organ responsible for safely clearing the drug. Urine output is the most direct clinical indicator of kidney function.
• Eliminate other options by recognizing they assess different, though still important, aspects of the patient's condition (fluid balance, infection, circulation) but are not the primary safety check for potassium itself.

Concept Tested & Keywords

• Concept Tested: Priority nursing assessment for IV potassium administration in pediatric dehydration.
• Stem keywords: intravenous (IV) solution, potassium chloride, child, hypotonic dehydration, priority assessment
• Lead-in keywords: priority assessment
• Clinical cues: A child with hypotonic dehydration receiving an IV prescription containing potassium chloride.

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