A 5-year-old child with hemolytic-uremic syndrome (HUS) is admitted to the pediatric intensive care unit. The child has oliguria, hypertension, and laboratory results showing hemoglobin 6.2 g/dL, platelet count 45,000/mm³, and elevated BUN and creatinine. Which nursing intervention should be the highest priority?

Neurological monitoring is the highest priority due to the risk of cerebral edema and seizures in HUS patients. Other interventions are less critical or contraindicated in this acute setting.

Core Nursing Explanation Key Concept Analysis: This question assesses the priority nursing intervention for a child with acute Hemolytic-Uremic Syndrome (HUS). HUS is characterized by the triad of microangiopathic hemolytic anemia, thrombocytopenia, and acute kidney injury (AKI). The pathophysiology involves endothelial damage, often from Shiga toxin-producing E. coli (STEC), leading to platelet aggregation and fibrin deposition in small blood vessels. This causes red blood cell (RBC) destruction, low platelets, and clogging of the glomeruli, resulting in renal failure. In the acute phase, the most life-threatening complication is Key Point! neurological involvement, such as cerebral edema, hypertensive encephalopathy, or seizures, which can rapidly deteriorate the patient's condition.

Answer Rationale: Option ④ is correct because it directly addresses the most immediate threat to life. The child's lab values show severe anemia (Hgb 6.2 g/dL), severe thrombocytopenia (Platelets 45,000/mm³), and signs of renal failure (oliguria, elevated BUN/Creatinine). Hypertension is already present, which significantly increases the risk for intracranial hypertension and seizures. Key Point! Neurological changes (lethargy, irritability, visual disturbances, seizures) are often the first sign of worsening cerebral edema or hypertensive crisis in HUS, making continuous neurological assessment the highest nursing priority to prevent catastrophic outcomes.

Distractor Analysis:
Watch out for confusion! Option ①: Encouraging increased fluid intake is generally contraindicated in the oliguric phase of HUS. The child has oliguria and hypertension, indicating fluid overload and the kidneys' inability to excrete it. Forcing fluids could worsen hypertension and precipitate pulmonary edema or cerebral edema.
Option ②: Administering aspirin is contraindicated. The child has severe thrombocytopenia, and aspirin is an antiplatelet agent that would increase the risk of bleeding. Furthermore, fever management in children typically uses acetaminophen or ibuprofen (with caution in renal impairment), not aspirin, due to the risk of Reye's syndrome.
Option ③: Providing a high-protein diet is inappropriate during acute kidney injury. A high protein load increases nitrogenous waste products (BUN), which the failing kidneys cannot excrete, potentially worsening uremia. The diet for acute renal failure is typically restricted in protein, potassium, sodium, and phosphorus.

Related Concepts: The nursing priorities in HUS follow the ABC (Airway, Breathing, Circulation) framework, with neurological status being a critical component of "C" (Circulation/Cerebral perfusion). Management focuses on supportive care: managing hypertension, correcting electrolyte imbalances (especially hyperkalemia), possibly administering packed RBCs for severe anemia, and preparing for dialysis if renal failure is severe.

Nursing Clinical Practice Guide Clinical Scenario: You are the nurse in the PICU (Pediatric Intensive Care Unit) caring for Liam, a 5-year-old who developed HUS after a diarrheal illness. He is irritable, has a blood pressure of 142/90 mmHg, and urine output has been 95th percentile for age/height/sex indicates hypertension requiring intervention.

A Word from Your Senior Nurse "In the whirlwind of a PICU admission with scary labs and a sick child, it's easy to get focused on the numbers. But your most powerful tool is your assessment. A child who becomes suddenly quiet or excessively irritable can be telling you their brain is under pressure long before a machine alarms. In HUS, the kidneys are the headline, but the brain is the breaking news. Your vigilant neuro checks are the early warning system that can trigger life-saving interventions. On the NCLEX, they test this priority-setting constantly: What kills first? In HUS, it's the brain. Remember that."