Variable form stent and deployment arrangement for use therewith

• US 20020165599A1
• Filed: 05/23/2001
• Published: 11/07/2002
• Est. Priority Date: 05/01/2001
• Status: Abandoned Application

• Current Assignee: Max Nasralla
• Original Assignee: Max Nasralla
• Inventors: Nasralla, Max
• Application Number:
  US09/864,028
• Publication Number:
  US 20020165599A1
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0036 differing in thickness
• CPC Class Codes: A61F 2250/0037 differing in height or in length
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61M 2025/1059 having different inflatable sections mainly depending on the response to the inflation pressure, e.g. due to different material properties
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence

Abstract

A stent implantation arrangement comprises a stent (18) mounted upon a balloon (10), the stent (18) extending over regions (12, 14) of the balloon (10) of different diameters, when the balloon occupies an inflated condition. A stent (18) particularly suitable for use in the implantation and deployment arrangement includes regions of different radial resistance to expansion.

Claims

1. A stent implantation arrangement comprising an inflatable balloon (10) and a stent (18) mounted upon the balloon (10) by being crimped over the balloon, the balloon (10) being of the type which, when inflated to a given pressure, has a useful length which adopts a non-cylindrical shape, and characterised in that the stent is crimped over the useful length of the balloon which, when inflated, adopts the non-cylindrical shape.

2. An arrangement as claimed in claim 1, characterised in that the balloon (10), when inflated, includes a pair of relatively large diameter regions (12, 16) separated by a relatively small diameter region (14), the stent (18) overlying the parts of the balloon (10) which, when inflated, form both of the relatively large diameter regions (12, 16).

3. An arrangement as claimed in claim 2, characterised in that the balloon (10) includes at least one further region of a different diameter.

4. An arrangement as claimed in any one of claims 1 to 3, characterised in that the balloon (10) is of continuously varying diameter along its length.

5. An arrangement as claimed in any one of the preceding claims, characterised in that the balloon, when inflated, includes a relatively large diameter region (12) and a relatively small diameter region (14) the stent (18) having a relatively low radial resistance to expansion in a first part (24) thereof which overlays the part (12) of the balloon which, when inflated, is of relatively large diameter, and a higher radial resistance to expansion in a second part (26) thereof which overlays the part (14) of the balloon (10) which, when inflated, is of relatively small diameter.

6. An arrangement as claimed in claim 5, characterised in that the stent comprises a plurality of radially expandable rings made up of interconnected struts, and wherein the first region (24) of the stent (18) has a different strut thickness to the second region (26) thereof.

7. An arrangement as claimed in claim 5 or claim 6, characterised in that the stent (18) comprises a plurality of corrugated rings (20) interconnected by ‘

S’

shaped linkages (22).

8. A stent comprising a tubular body defined by a plurality of corrugated rings (20) interconnected by ‘

S’

shaped linkages (22), each corrugated ring (20) comprising a plurality of struts interconnected with one another, and characterised in that the struts of at least one of the rings (20) are of a different thickness to the struts of at least one other of the rings (20).