ERCP - Applications, Procedure, Contraindications, and Complications

What Is ERCP?

Endoscopic retrograde cholangiopancreatography is a diagnostic procedure that is a combination of upper gastrointestinal endoscopy and X-rays to treat problems in the liver, pancreas, gallbladder, bile ducts, and pancreatic ducts. The bile ducts carry bile from the liver to the gallbladder and duodenum. The pancreatic ducts are tubes that carry pancreatic juice from the pancreas to the duodenum.

What Can Be Diagnosed With ERCP?

ERCP is used to find the cause of unexplained abdominal pain and yellowing of the skin and eyes (jaundice).

Other conditions found with ERCP include:

• Pancreatitis.

• Liver, pancreas, and bile duct tumors.

• Blockage or stone in the bile ducts.

• Bile or pancreatic duct fluid leakage.

• Blockage or narrowing of the pancreatic ducts.

• Infection in the bile ducts.

• Cholangitis, or inflammation, and potential infection.

• Biliary stricture (narrowing brought on by scar tissue).

How to Prepare for the ERCP procedure?

• Do not eat or drink liquids eight hours before the procedure.

• Inform the doctor about the medications and supplements one is taking.

• Inform the doctor about the previous allergies or reactions to medications or contrast dye and iodine.

• Inform if pregnant.

• Inform the doctor about the medical history of bleeding disorders or the current medications such as blood thinners like Aspirin, Clopidogrel, and Warfarin. These medicines should be stopped before the procedure.

• Inform about any heart conditions, and if there is heart valve disease, antibiotics will be administered before the procedure.

• A sedative is given before the procedure so the patient is in a sleep-like state and does not feel any pain.

What Is the Mechanism of ERCP?

Endoscopy and fluoroscopy, a kind of moving X-ray, are combined in ERCP. The fluid flow via the biliary ducts can be demonstrated with a fluoroscopy. The doctor can detect any fluid leaks in the biliary system and investigate the cause of the problem.

With the help of the endoscope, endoscopists can physically enter the site. The contrast agent that makes fluoroscopy possible is injected in this way. It also enables them to address problems as soon as they arise.

Who Is Responsible for Performing an ERCP?

A gastroenterologist normally performs an ERCP. They specialize in conditions of the gastrointestinal tract, including the biliary system. Additionally, they are experts in endoscopies. They receive training in endoscopic procedures, which can replace minor surgeries.

What Happens During the Procedure?

The patient needs to remove clothing, jewelry, or other objects that interfere with the procedure. The patient is given a hospital gown and lies on an examination table. The doctor will monitor the vital signs during the procedure. An intravenous line is put in the hand, and an oxygen tube is inserted into the nose. An anesthetic spray is sprayed into the back of the throat to prevent gagging when the endoscope is passed into the throat. A mouthguard is put into the mouth to protect the teeth, and saliva is suctioned using a saliva ejector.

The doctor inserts the endoscope down the esophagus into the stomach and through the duodenum until it reaches the bile ducts. Air and contrast dye is injected into the ducts through a small tube that is put inside the endoscope. This may give a feeling of fullness in the abdomen. Many X-rays are taken with changing positions. Once the X-rays of the biliary ducts are completed, the small tube in the endoscope is redirected to the pancreatic duct. Contrast dye is injected into the pancreatic duct, and X-rays are taken. The doctor also takes a tissue sample for examination. The doctor also passes tiny tools through the endoscope to perform some procedures.

Those include:

• Remove small tumors in the ducts.

• Sphincterotomy: This procedure involves cutting the muscle between the common bile and pancreatic ducts to enlarge the openings and remove stones.

• Insert stents, which are tiny plastic tubes that a doctor places in narrowed ducts to hold them open. After gallbladder surgery, a doctor may also insert temporary stents to stop bile leaks.

Once the X-rays and other procedures are over, the endoscope is slowly withdrawn. The procedure mostly takes about one to two hours.

What Happens After ERCP?

The patient is shifted to the recovery room. The patient should not eat or drink anything until the gag reflex is returned. The patient will have a sore throat and pain during swallowing for a few days, which is normal. The doctor discusses the results of the procedure with the patient, and if a biopsy is taken, the result will take a week.

What Is Spyglass ERCP?

ERCP with spyglass is an innovative system that directly visualizes all bile-duct quadrants. The ERCP, with a spyglass system, enables doctors to provide a definitive diagnosis and perform therapeutic interventions in one procedure. ERCP with spyglass is a miniature 6,000-pixel fiber-optic probe attached to a camera head. The probe is inserted through an access and delivery catheter. The catheter is single-use and can be moved in all directions. In addition, the ERCP, which has a spyglass system, provides four-way steer-ability and dedicated irrigation channels. This system has a 1.2 mm working channel, allowing diagnostic and therapeutic tools.

When Is ERCP Contraindicated?

• Existing bowel perforation.

• Unstable cardiopulmonary, neurologic, or cardiovascular status.

• Structural abnormalities of the esophagus, stomach, and small intestine.

• Previous pancreatoduodenectomy.

• Acute pancreatitis.

• Hypersensitivity to iodine contrast medium.

What Are the Complications Of ERCP?

Some possible complications include:

• Inflammation of the pancreas and gallbladder.

• Infection.

• Bleeding.

• A tear in the esophageal lining or stomach.

• Collection of bile outside the biliary system.

What Are the Other Diagnostic Methods Alternative to ERCP?

Several ERCP alternatives provide the same diagnostic results as the ERCP procedure. However, they cannot provide treatment. Therefore, the doctor should decide whether ERCP or an alternative is suitable for the patient depending on the symptoms and disease condition.

Some methods include:

• Ultrasound: This is an alternative to the ERCP procedure that uses sound waves. Similar to ERCP, an ultrasound can detect blockages or abnormalities in the biliary system.

• CT Cholangiography: This involves the injection of a contrast medium or dye into the body, and a scan is performed.

• Endoscopic Ultrasound: This is an alternative to the ERCP procedure in which ultrasound is combined with endoscopy.

• Magnetic Resonance Cholangiopancreatography (MRCP): MRCP is non-invasive and is done externally with a machine that generates a magnetic field around the patient, taking diagnostic images. Dye is not used in the MRCP procedure.

Conclusion:

ERCP is more commonly used since it is less invasive than surgery and has a high success rate. It is usually an outpatient procedure, and the patient is discharged on the same day. In addition, it can be used for diagnostic and therapeutic purposes. ERCP is a straightforward procedure, but it requires more skill to perform.