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US7527644: Stent with geometry determinated functionality and method of making the same

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Filing Information

Inventor(s) Eric K. Mangiardi · Jason M Reynolds ·
Assignee(s) Alveolus Inc. ·
Attorney/Agent(s) Alston & Bird LLP ·
Primary Examiner Kevin T Truong ·
Application Number US10288615
Filing date 11/05/2002
Issue date 05/05/2009
Prior Publication Data
Predicted expiration date 11/06/2022
Patent term adjustment 1
U.S. Classifications 623/115  ·
International Classifications A61F206  ·
Kind CodeB2
38 Claims, 5 Drawings


Abstract

The present invention, in an exemplary embodiment, provides a stent, which combines many of the excellent characteristics of both silicone and metal stents while eliminating the undesirable ones. In particular, a principal objective in accordance with the present invention is to provide a family of stents where the relative hardness/softness of regions of the stent can differ from other regions of the stent to provide additional patient comfort and resistance to radial forces. An exemplary embodiment also provides a family of stents with novel interstice configurations that facilitate flexibility, durability and/or proper installation.

Independent Claims | See all claims (38)

  1. 1. A medical appliance for placement within a portion of the anatomy of a patient, the appliance comprising: a scaffolding, the scaffolding configured to define a substantially cylindrical member having a distal end and a proximal end and extending longitudinally there between, forming a lumen there through, such that when pressure is exerted along varying points of the longitudinal extension of the appliance, the appliance does not undesirably foreshorten or elongate said scaffolding including: a plurality of expandable circumferential bands, each of the circumferential bands having a plurality of angularly extending legs with interconnected ends defining a plurality of peaks and valleys, wherein the legs have approximately equal lengths within each of the circumferential bands, and a plurality of connectors coupled to respective peaks and/or valleys of each adjacent pair of the circumferential bands, each of the connectors including a flexible portion that is configured to be positioned between peaks and/or valleys of adjacent ones of the circumferential bands when the scaffolding is compressed, wherein each flexible portion includes a pair of connector leg members and a crossing member that connects the leg members at a predetermined angle, and wherein the peaks of at least two adjacent circumferential bands are connected by the connectors extending therebetween to define a plurality of arrow shaped regions.
  2. 32. A method of treating a patient suffering from luminal irregularities, comprising the steps of: providing a medical appliance comprising a scaffolding, the scaffolding configured to define a substantially cylindrical member having a distal end and a proximal end and extending longitudinally there between, forming a lumen there through, along the longitudinal extension of the appliance the scaffolding forms geometrical patterns formed by angles, wherein the angles determine the relative flexibility of the medical appliance such that the appliance conforms to the topography of a target lumen and when pressure is exerted along varying points of the longitudinal extension of the appliance, the appliance does not undesirably foreshorten or elongate, said scaffolding including: a plurality of expandable circumferential bands, each of the circumferential bands having a plurality of angularly extending legs with interconnected ends defining a plurality of peaks and valleys, wherein the legs have approximately equal lengths within each of the circumferential bands, and a plurality of connectors coupled to respective peaks and/or valleys of each adjacent pair of the circumferential bands, each of the connectors including a flexible portion that is configured to be positioned between peaks and/or valleys of adjacent ones of the circumferential bands when the scaffolding is compressed, wherein each flexible portion includes a pair of connector leg members and a crossing member that connects the leg members at a predetermined angle, and wherein the peaks of at least two adjacent circumferential bands are connected by the connectors extending therebetween to define a plurality of arrow shaped regions; installing the medical appliance in a preferred location of the anatomy of the patient; and activating the expansion of the medical appliance in the desired location.
  3. 38. A medical appliance comprising: a plurality of expandable circumferential bands, each of the circumferential bands having a plurality of angularly extending legs with interconnected ends defining a plurality of peaks and valleys, wherein the legs have approximately equal lengths within each of the circumferential bands; and a plurality of connectors coupled to respective peaks and/or valleys of each adjacent pair of the circumferential bands, each of the connectors including a flexible portion that is configured to be positioned between peaks and/or valleys of adjacent ones of the circumferential bands when the medical appliance is compressed, wherein said flexible portion is further configured to extend circumferentially to abut a circumferentially adjacent flexible portion when the medical appliance is compressed, and wherein each flexible portion includes a pair of connector leg members and a crossing member that connects the leg members at a predetermined angle, and wherein the peaks of at least two adjacent circumferential bands are connected by the connectors extending therebetween to define a plurality of arrow shaped regions.

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