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Biliary Self-Expanding Metal Stent (SEMS)

A biliary metal stent (biliary self-expanding metal stent, SEMS) is a self-expanding metal stent that relieves a malignant stricture of the bile duct during ERCP. The stent on this page is woven from a single Nitinol wire and placed through the scope. It has a 10 mm diameter and lengths from 40 to 100 mm, uncovered or partially covered.

This page is intended for healthcare professionals.

Biliary Self-Expanding Metal Stent (SEMS)

Single-wire-design self-expanding metal stents (SEMS) made of Nitinol for relieving malignant strictures in the biliary tree.

In which cases?

  • Malignant biliary obstruction palliated in a patient who will not be operated on.
  • A stricture that needs to stay open longer than a plastic stent stays patent.
  • A duct already stented with plastic, where the stent is upgraded at the exchange.
  • A stricture where a partially covered stent is wanted because tumour ingrowth is expected.

What makes it different?

  • Nitinol expands at body temperature and holds a steady radial force on the stricture.
  • Woven from one wire, so there is no cut end sitting against the duct wall.
  • Tantalum radiopaque markers, so both stent ends are placed under fluoroscopy.
  • 10 mm diameter in 40 to 100 mm lengths, uncovered or partially covered.

Frequently asked questions

What is a biliary metal stent (SEMS)?

A biliary metal stent is a self-expanding metal stent (SEMS) placed through the scope to open a malignant stricture of the bile duct. The stent on this page is woven from a single Nitinol wire and expands at body temperature, and tantalum radiopaque markers show both ends under fluoroscopy. It is used to palliate a malignant biliary obstruction in a patient who will not be operated on, and where a plastic stent will not hold the duct open.

What is the difference between a covered and an uncovered biliary metal stent?

In an uncovered stent the wire mesh is open; in a partially covered stent a part of the mesh is covered. The stent on this page has a 10 mm diameter and comes in 40 to 100 mm lengths, uncovered or partially covered. One use on this page is a stricture where tumour ingrowth is expected and a partially covered stent is wanted. The choice of version is the physician's, and the instructions for use of the product apply.

What sizes does a biliary metal stent come in?

The stent on this page has a 10 mm diameter and comes in lengths from 40 to 100 mm, uncovered or partially covered. This page does not list the delivery system size. We can share the product documentation; write to us with the button on this page.

When is a metal biliary stent used instead of a plastic one?

According to this page a metal stent is used in a stricture that has to stay open longer than a plastic stent stays patent, and in a malignant biliary obstruction that a plastic stent will not hold open. The ERCP case flow on this site is summarised from the ESGE guidelines and lists a metal stent for a malignant stricture and a nasobiliary catheter for temporary external drainage as options. The choice depends on the stricture and the patient and is the physician's.

Is a biliary metal stent MRI safe?

This page holds no MR information for the product. MR information, where there is any, is part of the instructions for use and the label of the product, and this page does not call the stent MR safe or MR unsafe. The decision on an MR scan for a patient with a stent belongs to the physician who follows the patient and to the radiology team. We can share the product documentation; write to us with the button on this page.

Can I order a biliary metal stent (SEMS) in Türkiye, and what is the price?

Not yet. The biliary metal stent is not available for order in Türkiye, so this page carries no list price either. We can share the product documentation; write to us with the button on this page.

Updated: 09.11.2026

This product is not yet available for order in Türkiye. We can share the product documentation and the published studies.