ERCP with sphincterotomy

Why are we operating?

Endoscopic drainage of the obstructed bile duct: cannulate the papilla, cut the sphincter, clear the stones, and in cholangitis, drainage beats everything else on the list.

Indication: Choledocholithiasis, ascending cholangitis, malignant obstruction for stenting; therapeutic, not diagnostic.

The operation in 4 steps

1. 01Reaching the papilla

   A side-viewing duodenoscope is passed to the second part of the duodenum and the major papilla brought face-on.

   Why: The papilla opens sideways into the duodenum, which is why this is the one endoscope that looks sideways; position and view decide the success of everything after.

2. 02Selective biliary cannulation

   A sphincterotome and guidewire are steered into the bile duct rather than the pancreatic duct, confirmed by wire course and contrast.

   Why: The bile duct runs at eleven o'clock, the pancreatic duct at one; every unintended pancreatic entry raises the risk of the procedure's defining complication, post-ERCP pancreatitis.

3. 03Sphincterotomy and clearance

   The biliary sphincter is divided with the sphincterotome along the eleven o'clock axis, then stones are swept with balloon or basket.

   Why: The cut converts a valve into a door: stones can be pulled out and future stones can pass. The axis matters because the retroduodenal artery waits for cuts that stray.

4. 04Ensuring drainage

   Clearance is confirmed on the cholangiogram; if the duct cannot be cleared or a stricture obstructs, a stent secures drainage.

   Why: In cholangitis the goal is drainage, not perfection: an infected obstructed duct is the emergency, and a stent that buys a septic patient time is a complete operation for today.

Danger zones

• Common bile duct

  The structure every biliary operation is designed not to injure; misidentification is the field's defining catastrophe.

• Right hepatic artery

  Crosses the triangle aberrantly in about one in seven patients, hugging the cystic duct.

• Duct of Luschka

  A small subvesical duct in the liver bed; missed, it declares itself as a postoperative bile leak.

Anatomy you need

The scope's route: stomach, duodenum, then the ampulla where the biliary and pancreatic ducts share a door.

What can go wrong

• Postoperative bleeding

  Tachycardia first, hypotension late; falling urine output; a distending abdomen or rising drain output.

• Bile leak

  Right upper quadrant pain, fever, and bilious drain output, or a patient who is simply failing to thrive after cholecystectomy.