The production of biliary stents makes use of three fundamentally different technologies:

“S”:
Fixed, braided stent structure consisting of one nitinol wire that is braided into a tube shape. This gives the stent its characteristic form through the memory effect, and it reassumes this shape every time it is deformed.

“D”:
In contrast to the “S” sent, in a “D” stent two nitinol wires are braided together. This allows the stent to maintain its form at a defined radial strength through the memory effect in the radial direction. It can be retracted in the axial direction to bend while the stent maintains its form. This provides an ideal balance of radial strength and flexibility, and is an advantage particularly if the stent needs to be placed in tortuous anatomies.

“ComVi”:
The “ComVi” stent produced by Taewoong consists of two nested “D” stents that are separated from each other by a PTFE foil. This design provides optimum radial strength and the PTFE membrane prevents tissue ingrowth. The outer stent structure also prevents migration.