Biliary Stenting: Procedure, Benefits & Recovery
Biliary Stenting: Procedure, Benefits & Recovery
Biliary stenting is a medical procedure used to restore the flow of bile when a bile duct becomes narrowed or blocked. Bile is produced by the liver and helps digest fats while allowing the body to eliminate bilirubin. When normal bile drainage is disrupted, it can lead to jaundice, abdominal discomfort, itching and potentially serious infections.
A biliary stent is a small, hollow tube placed inside the bile duct to keep it open and allow bile to drain into the intestine. The procedure is commonly used for blockages caused by gallstones, bile duct strictures, inflammation or tumours affecting the biliary system.
Biliary Stent
A biliary stent is designed to maintain an open passage through an obstructed or narrowed bile duct. It allows bile to flow more freely and helps reduce the pressure that develops behind the blockage.
Stents are generally made from plastic or metal. The appropriate type depends on the underlying condition, expected duration of treatment and whether the obstruction is benign or malignant.
Conditions That May Require Biliary Stenting
Biliary stenting may be recommended for several conditions, including:
- Common bile duct obstruction caused by gallstones
- Benign bile duct strictures
- Bile duct injuries following surgery
- Pancreatic cancer causing biliary obstruction
- Cholangiocarcinoma, or bile duct cancer
- Gallbladder cancer affecting bile drainage
- Selected cases of acute cholangitis
- Postoperative narrowing of the biliary tract
The treatment plan depends on the location and severity of the obstruction and the patient’s overall condition.
Types of Biliary Stents
Two main types of stents are used to maintain bile duct drainage.
Plastic Stents
Plastic stents are commonly used for temporary drainage. They may be appropriate for benign strictures, selected bile duct stones and situations where the obstruction is expected to resolve or require reassessment.
Plastic stents can become blocked over time, so a planned removal or replacement procedure is important.
Metal Stents
Metal stents generally have a larger internal diameter than plastic stents.
They may be used for selected malignant obstructions and certain benign strictures. Some metal stents are covered to facilitate removal, while uncovered stents are generally difficult to remove once tissue grows through their mesh.
The choice depends on the diagnosis, treatment goals and expected duration of stenting.
How Biliary Stenting Is Performed
Biliary stenting is commonly performed using endoscopic retrograde cholangiopancreatography (ERCP).
During the procedure, an endoscope is passed through the mouth into the small intestine. The specialist accesses the opening of the bile duct and uses imaging guidance to identify the obstruction.
The procedure may involve:
- Injecting contrast material to visualise the bile ducts
- Identifying the location of the blockage
- Removing stones when appropriate
- Dilating a narrowed segment when necessary
- Inserting the stent across the obstruction
- Confirming that bile drainage has improved
In selected patients, a stent may instead be placed through the skin using percutaneous techniques or through an endoscopic ultrasound-guided approach.
Benefits of Biliary Stenting
Biliary stenting helps restore bile drainage without requiring major surgery in many cases.
Potential benefits include:
- Relief of obstructive jaundice
- Reduction in bilirubin levels
- Improvement in bile flow
- Relief of obstruction-related itching
- Treatment support for bile duct infections
- Management of obstruction caused by certain cancers
- Improved readiness for further treatment in selected patients
The benefits depend on whether the stent successfully bypasses the blockage and whether the underlying cause can also be treated.
Recovery After Biliary Stenting
Recovery depends on the reason for stenting, the technique used and the patient’s general health.
After ERCP, patients are monitored for pain, nausea and other early complications. Food and fluids are generally resumed according to the treating team’s instructions.
Follow-up may include:
- Liver-function tests
- Bilirubin monitoring
- Assessment of symptom improvement
- Review of stent position when indicated
- Scheduling stent removal or exchange
- Further treatment of the underlying disease
Patients with plastic stents usually require a clearly documented plan for removal or replacement. Some metal stents are intended to remain in place long term, depending on the indication.
Possible Complications
Although biliary stenting is commonly performed, complications can occur.
These include:
- Pancreatitis after ERCP
- Bleeding
- Infection or cholangitis
- Stent blockage
- Stent migration
- Bile leakage
- Injury to the bile duct
The risk varies according to the procedure, underlying disease and patient’s medical condition.
Signs of Stent Blockage
A stent can become blocked by sludge, bacterial deposits or other material. Tumour growth may also obstruct a stent in patients with malignant disease.
Warning signs include:
- Recurrence of jaundice
- Dark urine
- Pale stools
- Increasing itching
- Fever or chills
- Upper abdominal pain
Fever, chills or jaundice accompanied by worsening illness may indicate cholangitis and require urgent medical assessment.
Conclusion
Biliary stenting is an important treatment for restoring bile flow when the bile duct is narrowed or blocked. Plastic and metal stents provide different options depending on the cause and expected duration of obstruction. Although the procedure can relieve jaundice and support the treatment of biliary infection, regular follow-up is essential to identify blockage or other complications.
At Delta Hospitals, patients with suspected bile duct obstruction can undergo clinical assessment, liver-function testing and appropriate imaging to identify the cause and extent of the blockage.