A 70-year-old man is brought to the emergency department from a skilled nursing facility due to a 2-day history of worsening fever, right upper quadrant abdominal pain, and new-onset confusion. His past medical history is significant for hypertension and osteoarthritis. His temperature is 39.2°C (102.6°F), blood pressure is 88/54 mm Hg, pulse is 118/min, and respiratory rate is 22/min. Physical examination reveals scleral icterus, dry mucous membranes, and significant tenderness to palpation in the right upper quadrant without rebound or guarding. Laboratory studies demonstrate a leukocyte count of 18,500/mm³, total bilirubin of 5.2 mg/dL, direct bilirubin of 4.1 mg/dL, and alkaline phosphatase of 450 U/L.
Arrange the following steps in the most appropriate chronological order for the optimal management of this patient's condition.
- 1Obtain blood cultures and initiate intravenous fluid resuscitation and broad-spectrum antibiotics.
- 2Perform a right upper quadrant abdominal ultrasound.
- 3Perform an endoscopic retrograde cholangiopancreatography (ERCP).
- 4Perform an elective laparoscopic cholecystectomy.