Stent suitable for deployment in a blood vessel

US9149377B2 · kind B2 · utility

Assignee

• Veryan Medical Limited · GB

Inventors

• Kevin Heraty · Castlebar, IE
• Liam Mullins · Athlone, IE

Key dates

• Filing date: Oct 10, 2008
• Grant date: Oct 6, 2015
• Expiry date: Oct 16, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2250/0039
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A stent (1) comprises a central section (2), a first intermediate section (3), a first end section (4), a second intermediate section (5), and a second end section (6). The stent (1) is movable between a collapsed delivery configuration and an expanded deployment configuration. In the delivery configuration the central section (2), the first intermediate section (3), the first end section (4), the second intermediate section (5), and the second end section (6) are all cylindrically shaped. In the deployment configuration the central section (2) is helically shaped, while the first end section (4) and the second end section (6) remain cylindrically shaped. Each intermediate section (3, 5) acts as a blended region to provide a smooth transition from the helical shape of the central section (2) to the cylindrical shape of the unstented blood vessel. The radial stiffness of the stent (1) varies gradually along part of the length of the stent (1). The radial stiffness of the end region of the stent (1) is less than the radial stiffness of a first region located further in from the end of the stent (1). The variation in radial stiffness reduces the area of blood vessel wall which has low…