A nurse is caring for a patient with portal hypertension who suddenly develops signs of respiratory distress, dizziness, and increasing restlessness after coughing up blood tinged sputum. Which nursing action should be prioritized to address the most likely complication?

Portal hypertension is characterized by increased resistance to portal blood flow leading to formation of esophageal varices, risk of massive upper gastrointestinal bleeding, varices, hypovolemia, and life-threatening hemodynamic instability state present Rationale: A. Administer diuretics immediately is inappropriate because acute presentation suggests active upper gastrointestinal bleeding rather than fluid overload management. Diuretics do not control variceal hemorrhage. Priority is stabilization and bleeding control management protocol. This delays definitive endoscopic and resuscitative interventions required. B. Prepare to administer intravenous vasopressors is not first-line for suspected variceal bleeding. Initial priority is airway and volume resuscitation management required urgently. Vasopressors worsen perfusion in acute hemorrhage hypovolemia. Endoscopic intervention is definitive treatment for bleeding control of source required. C. Initiate oxygen therapy and monitor arterial blood gases is inappropriate first response in suspected variceal bleeding. Primary concern is hemorrhage control rather than ascites related hypoxia. Oxygen does not treat ongoing gastrointestinal bleeding. Endoscopic intervention and resuscitation are urgently required. D. Assess for signs of esophageal variceal bleeding and prepare for emergency endoscopic intervention is priority. Findings suggest acute upper gastrointestinal hemorrhage with hemodynamic instability. Early recognition and preparation for endoscopy reduces mortality. This addresses underlying bleeding source causing respiratory compromise.