How long does an intestinal stent last after ERCP?

The duration an intestinal stent lasts after ERCP depends on the type of stent, location, and underlying condition (malignant vs. benign). Here's a breakdown:

1. Plastic Stents

• Typical Duration: 3 to 4 months

• Use Case: Often used for benign strictures, bile leaks, or as a temporary solution in malignancies.

• Needs Replacement: Frequently clog due to biofilm, debris, or sludge, so regular monitoring and scheduled replacement are needed.

2. SEMS (Self-Expanding Metal Stents)

• Uncovered SEMS:

• Duration: 6 to 12 months or more

• Use Case: Primarily for malignant obstructions (not intended for removal)

• Limitation: Tumor ingrowth can eventually block the stent.

• Covered SEMS:

• Duration: Similar to uncovered (6–12 months)

• Use Case: Allow for removal or repositioning; used in both benign and malignant conditions.

• Limitation: Higher risk of migration, especially in duodenal or non-fixed sites.

3. Biodegradable Stents (Experimental or Limited Use)

• Duration: Designed to degrade over weeks to months

• Use Case: Select benign cases, pediatric use, or where long-term foreign body is undesirable

• Status: Still under investigation and not standard

Summary Table

For malignant cases, metal stents (SEMS) are preferred due to their longer patency and fewer interventions. Regular follow-up imaging and symptom assessment are essential to ensure continued function.

Would you like guidance on monitoring or signs of stent blockage?