Question: A 49-year-old woman came to the emergency room due to shivering, fever of 39ºC, pain in the right hypochondrium, jaundice and vomiting. The scan reveals TA 100/50 mmHg. FC 110 lpm. Prostration and pain on palpation in the right quadrant, with positive Murphy. The analytical sample shows leukocytosis with left deviation and abdominal ultrasound, cholelithiasis, choledocholithiasis and dilation of the extrahepatic bile duct. Empirical treatment is started with antibiotic and fluid therapy. What is the most effective procedure to perform next? 
 Options:  <1> Maintain antibiotic treatment and support measures with posterior regulated cholecystectomy. <2> Laparoscopic cholecystectomy. <3> Placement of an external biliary drainage. <4> Urgent cholecystectomy with cannulation of the common bile duct. <5> Endoscopic retrograde cholangiopancreatography with sphincterotomy.
5