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STENT NITI-S
BILIARY STENT ( TAEWOONG STENT )

Indications for:
- Bile duct injury after of during surgery: 80% of benign stricture occur following injury during a cholecystectomy
- Secondary to Chronic pancreatitis
- Duct-to-duct anastomosis after liver transplantation: bile duct stricture usually occur 2-6 months after LT (5-20% of patients)
General features:
- Quick and easy for deploying by endoscopy, interventional radiology and percutaneous.
- Rounded edge at both head ends helps to reduce the tissue hyperplasia reaction.
- It has the diameter from 8-10mm and the length from 40-120mm loaded into 7-8Fr delivery system. Stents are available with delivery systems designed for deployment either percutaneous approach or endoscopic approach.
- It has 8 radiopaque markers for the better control of deploying stent.

1.1. Niti-S biliary uncovered stent
+ S-type

- Fixed cell with braided construction for flexible and resistant to fracture.
- Atraumatic ends; less hypherplasia at the edges
- Ideal combination of radial and axial force to maintain full luminal patencyshape.
- Radiopaque marker: 3 (three) at the both ends & 2 (two) at the middle

+ D-type – (exclusive design)
- Unfixed cell with weaving construction for flexible and resistant to fracture
- Ideal combination of radial and axial force to maintain full luminal patency in torturous anatomy.
- Low foreshortening for accurate positioning
- Radiopaque marker: 3 (three) at the both ends & 2 (two) at the middle


+ Y/T-type
- Effective solution for bilateral stenting for malignant hilar obstruction or T-junction
- To base on D-type but 2cm section at the central interstice portion wasimproved on inserting second stent easily.
- Low foreshortening for accurate positioning
- Radiopaque marker: 4 (four) at the both ends & special 2cm long markers at the central interstice portion

+ LCD-type
- Improve base on Y/T-type
- Make good Y/T-type’s shortcomings is just insert second stent at 2cm sectionat the central. The doctor can easily insert 2nd stent at any cell of 1st stent.
- After bilateral stent placement, the doctor can insert plastic stent inside toprevent the risk of migration.

                     

1.2. Niti-S biliary covered stent
+ S-type
- Stent with biocompatiblesilicone covered membrane
     + Smooth inner surface for hydrodynamic flow of bile and optimal resistance against to sludge
     + Silicone covering prevents the risk of tumor in-growth
     + Double coated silicone membrane prevents direct contact of metal with tissue but metal mesh still stick bile duct


- Specially, stent was designed with removal string at the proximal end facilitates safe and smooth removal and correct reposition
- Radiopaque marker: 3 (three) at the both ends & 2 (two) at the middle

+ Comvi-type
- It has 3layers: PTFE membrane tube is held between inside and outside D-type stent bodies being integrating into a single structure based on D-type.
- This construction keeps strong point of D-type to maintain full luminal patency in torturous anatomy and promotes the advantages of PTFE membrane – prevents risks of tissue invasion better than silicone membrane.
- Outer wire mesh prevents migration
- Minimum foreshortening for accurate positioning/ placement of stent
- Full covered type and both ends 5mm bare type
- Radiopaque marker: 4 (four) at the both covered part ends