Characteristic waist at mid-portion of the stent (8mm of waist/10mm of both ends). Allows the radial force of the metallic stent to be directed maximally to the centre hence inhibiting stent migration.
Fully covered short stent with long platinum radio-opaque marked retrieval string. Using a short stent across the stricture prevents to impart pressure over a large area of normal duct by reducing the potential risk of necrosis and fibrosis. The long string with vivid visualised by platinum markers of short stent will help to be easily removed from the high up location of the CBD.