Intravascular stent having a coaxial polymer member and end sleeves
AssigneeQuanam Medical Corporation
InventorsLinh Dinh, Beren Correa, Paul Cherkas, Angelica Alvarado, Irina D. Pomerantseva, Sudha Thakur, Robert Eury, Michael Froix
Life of this patent
Estimating the term…
Abstract
A radially-expandable stent for insertion into a lumen is described. The stent is composed of a radially-expandable support stent and a polymer tubular member co-axially disposed over the support stent. Tubular end sleeves are disposed around the first and second ends of the polymer-surrounded support stent to secure the tubular member and to provide other improvements.
Claims77
A radially-expandable stent for insertion into a lumen, comprising
- a radially expandable support stent of a selected axial length having first and second ends;
- a polymer tubular member co-axially disposed over the support stent and extending the length of the support stent, the polymer member being radially expandable with the support stent to an expanded diameter and having an internal surface and an external surface, and
- tubular end sleeves having an internal surface and an external surface, said end sleeves being disposed around said first and second ends of the polymer-surrounded support stent with the end sleeves' internal surfaces in contact with the polymer tubular member and the end sleeves' external surfaces exposed, said end sleeves (i) being radially expandable with the support stent to an expanded diameter, and (ii) covering 50% or less of the stent length.
An improvement in a stent of a selected axial length and having a polymer tubular member coaxially disposed about the stent, said improvement comprising
- tubular end sleeves, each end sleeve having an internal surface and an external surface, said end sleeves being disposed around each end of the stent such that the internal surface of each end sleeve is in contact with the polymer tubular member and the external surface of each end sleeve is exposed, said end sleeves being radially expandable with the stent to an expanded diameter and covering 50% or less of the stent length.
A method of preparing a stent for insertion into a lumen, comprising
- providing a radially expandable support stent of a selected axial length and having first and second ends;
- placing a polymer tubular member co-axially over the support stent and extending the length of the stent, the polymer member being radially expandable with the support stent to an expanded diameter, and
- securing tubular end sleeves around the first and second ends of the polymer-surrounded support stent, said end sleeves each having an internal surface in contact with the polymer tubular member and an external surface exposed, said end sleeves being radially expandable with the support stent to an expanded diameter and covering 50% or less of the stent length.
A method for achieving substantially uniform radial expansion in a stent of a selected axial length and having a polymer tubular member coaxially disposed about the stent, comprising,
- providing tubular end sleeves disposed around each end of the stent, said end sleeves each having an internal surface in contact with the polymer tubular member and an external surface exposed, said end sleeves being radially expandable with the stent to an expanded diameter and covering 50% or less of the stent length.
Dependencies are inferred from the claim text.