A client is admitted with urolithiasis and reports severe flank pain rated 9/10 with nausea and vomiting.
The client has not voided in 6 hours. Which nursing action is the priority?

Identifying life-threatening complications in immunocompromised oncology patients requires synthesizing laboratory data with clinical symptoms. Knowledge of systemic inflammatory response syndrome, cellular metabolism under stress, and neutropenia thresholds is essential to differentiate between expected chemotherapy side effects and the onset of acute septic shock.

Choice A rationale: An ANC of 400/mm³ signifies severe neutropenia (normal ≥ 1500/mm³), increasing vulnerability to infection. Combined with chills and a lactate of 5.6 mmol/L (normal ≤ 2.0 mmol/L), which indicates tissue hypoperfusion and anaerobic metabolism, the client meets criteria for septic shock.

Choice B rationale: Tumor lysis syndrome involves metabolic disturbances including hyperkalemia, hyperuricemia, and hyperphosphatemia resulting from rapid cancer cell death. While common in leukemia treatment, it does not typically present with severe lactic acidosis and sepsis symptoms like chills and extreme neutrophil depletion.

Choice C rationale: While chemotherapy-related fatigue is a standard expectation, it is a diagnosis of exclusion. Attributing a high lactate level and clinical instability to mere fatigue is a dangerous misinterpretation that ignores the objective evidence of physiological distress and cellular hypoxia.

Choice D rationale: Superior vena cava syndrome is an obstructive emergency characterized by facial edema, distended neck veins, and upper body redness due to blood flow blockage. It does not correlate with the metabolic lactic acidosis or the hematologic findings of neutropenia seen here.

Full thickness burns trigger massive systemic inflammatory responses and capillary leak syndrome. The clinical priority is addressing hypovolemic shock through aggressive fluid resuscitation to maintain organ perfusion, particularly when large surface areas like both legs are involved.

Choice A rationale

Sterile environments prevent secondary infections and sepsis in denuded skin areas. While infection control is vital in burn management, it is a secondary goal compared to the immediate physiological threat of hypovolemic shock and cardiovascular collapse.

Choice B rationale

Pain assessment is standard nursing practice, yet full thickness burns often destroy nerve endings, potentially resulting in less pain than partial thickness burns. Regardless, physiological stabilization and fluid replacement take precedence over subjective pain scaling in emergencies.

Choice C rationale

Prophylactic antibiotics are not typically the initial priority in acute burn care. Fluid resuscitation and airway management are paramount. Systemic antibiotics are usually reserved for documented infections rather than immediate emergency department stabilization of fluid status.

Choice D rationale

Burn injuries cause significant fluid shifts from the intravascular to the interstitial space. Administering Lactated Ringer solution is the gold standard for restoring volume and preventing acute tubular necrosis or organ failure during the first 24 hours.