A 76-year-old man is brought to the emergency department from a skilled nursing facility due to severe, intractable vomiting and diffuse abdominal pain for the past 48 hours. He has a history of an open appendectomy 40 years ago and atrial fibrillation, for which he takes warfarin. Over the last 4 hours, the nursing staff noted he became progressively lethargic and confused. On arrival, his temperature is 38.8°C (101.8°F), pulse is 138/min, blood pressure is 78/45 mmHg, and respirations are 28/min. Physical examination reveals an altered, diaphoretic man. The abdomen is markedly distended, rigidly board-like, and exquisitely tender with diffuse rebound tenderness and involuntary guarding. Bowel sounds are absent. Laboratory studies show a leukocyte count of 24,000/mm³, a serum lactate of 7.8 mmol/L, and an INR of 3.6. Arrange the following management steps in the most appropriate chronological sequence for this patient.
- 1Perform endotracheal intubation for airway protection and ventilatory support.
- 2Establish large-bore intravenous access and initiate aggressive isotonic crystalloid resuscitation.
- 3Administer intravenous broad-spectrum antibiotics and 4-factor prothrombin complex concentrate.
- 4Transfer to the operating room for an emergent exploratory laparotomy and bowel resection without primary anastomosis.
- 5Admit to the surgical intensive care unit for physiological optimization prior to a planned second-look laparotomy.