In a patient with acute renal failure, hypertonic glucose, insulin infusion and sodium bicarbonate can be use… - AIIMS Bhatinda NO - 2019

AIIMS Bhatinda NO - 2019

Medical Surgical Nursing

Medium

Appeared in: AIIMS Bhatinda NO - 2019

Explanation

Acute renal failure impairs the kidneys' ability to excrete potassium, leading to its accumulation in the blood (hyperkalemia).
Hyperkalemia is a medical emergency due to its risk of causing life-threatening cardiac arrhythmias.
The combination of insulin and glucose works by activating the Na-K pump, which drives potassium from the blood into the cells, thus lowering serum levels.
Sodium bicarbonate creates a temporary metabolic alkalosis, which also promotes an intracellular shift of potassium.
These interventions are rapid, temporary measures to stabilize the patient until definitive treatment like dialysis can be initiated.

Option A: Hypernatremia is a high serum sodium level. Its treatment involves correcting the underlying cause and administering hypotonic fluids to dilute the sodium, not insulin and glucose.
Option B: Hypokalemia is a low serum potassium level. The treatments listed (insulin, glucose, bicarbonate) would lower potassium levels further, which would be extremely dangerous and is contraindicated.
Option D: Hypercalcemia is a high serum calcium level. It is managed with hydration, loop diuretics (to enhance calcium excretion), bisphosphonates, and calcitonin, not the interventions listed in the question.

Clinical Relevance

Nursing practice connection: Knowing Management of electrolyte emergencies in acute renal failure helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Hyperkalemia is a critical complication of acute renal failure. Nurses must be able to recognize its signs, especially ECG changes like peaked T waves, widened QRS complexes, and arrhythmias.
The nurse's role includes continuous cardiac monitoring, frequent checking of serum potassium levels, and prompt administration of emergency medications as ordered.
Patient safety is paramount. When administering insulin for hyperkalemia, the nurse must also administer glucose to prevent iatrogenic hypoglycemia and monitor blood glucose levels closely.

How to Approach the Question

First, identify the core clinical condition presented in the question stem, which is 'acute renal failure'.
Next, recall the most common and life-threatening complications associated with this condition. Impaired kidney function leads to the retention of waste products and electrolytes, most notably potassium.
Analyze the interventions provided: hypertonic glucose, insulin infusion, and sodium bicarbonate.
Connect the mechanism of action of these interventions to the potential complications. Insulin is known to drive potassium into cells, and sodium bicarbonate also facilitates this shift.
Evaluate the options based on this connection. The interventions all serve to lower serum potassium, making 'Hyperkalemia' the only logical condition being treated.
Eliminate the other options by recalling their definitions and standard treatments, which do not match the interventions given.

Concept Tested & Keywords

Concept Tested: Management of electrolyte emergencies in acute renal failure.
Stem keywords: acute renal failure, hypertonic glucose, insulin infusion, sodium bicarbonate
Lead-in keywords: treat
Clinical cues: The patient's diagnosis of acute renal failure is a key cue, as it predisposes them to hyperkalemia due to impaired potassium excretion.

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