A nurse is caring for a client who was admitted with bleeding esophageal varices and has an esophagogastric balloon tamponade with a Sengstaken-Blakemore tube to control the bleeding.
Which of the following actions should the nurse take?

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.

Electrical burns require understanding the path of current through the body. Because electricity follows the path of least resistance, it often travels through the heart. This necessitates applying knowledge of cardiac rhythm disturbances and immediate diagnostic prioritization.

Choice A rationale

Checking pulses is important to assess for compartment syndrome or vascular damage in the right hand and left foot. However, it is secondary to assessing the heart, as electrical current can cause immediate, fatal cardiac arrest.

Choice B rationale

Irrigating wounds is part of standard burn care but is not the priority for electrical injuries. The surface wounds often mask extensive internal tissue damage. Addressing potential cardiac conduction issues must occur before performing local wound cleansing.

Choice C rationale

Electrical current passing between hands and feet frequently crosses the heart. This can cause immediate dysrhythmias or delayed cardiac irritability. Continuous telemetry is vital to monitor for life-threatening changes in the heart's electrical activity and rhythm.

Choice D rationale

While the client may experience pain, the report of chest tightness and lightheadedness suggests a cardiac or hemodynamic event. Administering opioids before stabilizing the cardiac status could mask symptoms or further complicate the clinical assessment process..