EP0274846B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for treating hypertrophy of the prostate gland
Assignee: Boston Scientific Corp
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Filing: 1987-12-01
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Granted: 1994-02-09
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Expires: 2007-12-01
Abstract
No abstract record available.
Inventors
- 👤 Robert F. Rosenbluth
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 05:38
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61F2/95; A61F2/958; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30182; A61F2002/30187; A61F2002/9155; A61F2002/91558; A61F2002/9583; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0034; A61F2230/0054; A61F2230/0063; A61F2230/0071
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
An elongate, cylindrical, expandable stent (18), comprising: a first end; a second end; a plurality of elongate members having a rounded non-rectangular cross section extending from said first end to said second end; and a plurality of nodes interconnecting adjacent members; characterised in that said elongate members and said nodes are integrally formed from a single piece of material and said stent exhibits a generally smooth outer profile.
Claim 2
Dependent Claim
92 words
An elongate, cylindrical expandable stent according to Claim 1, wherein said nodes (84,86, Fig.19) are arranged along the length of said adjacent members (80) so that, progressing from said first end to said second end, each member is alternately connected to members on either side thereof, and wherein the cross-sectional area of each said member is non-uniform, such that, for at least one node along the length of each member, the cross-sectional area of said member is greater adjacent to said one node than at a point removed from said one node.
Claim 3
Dependent Claim
17 words
The stent of Claim 1 or 2, wherein said members (80) are generally parallel to each other.
Claim 4
Dependent Claim
92 words
The stent of Claim 1 or 2, wherein each member is connected to adjacent members at at least four nodes arranged along the length of each member, and wherein said nodes comprise terminal nodes located at said first end and at said second end, secondary nodes adjacent to said terminal nodes, and interior nodes between said secondary nodes, wherein the cross sectional area of said members where they connect to said secondary nodes is greater on the terminal side of said secondary nodes than on the interior side of said secondary nodes.
Claim 5
Dependent Claim
16 words
The stent of Claim 1, wherein the said members are nonrectangular and rounded in cross section.
Claim 6
Dependent Claim
189 words
A method for making a catheter (2) having an expandable balloon (8) positioned in a recess (15) at the distal end thereof, comprising the steps of: providing a catheter (2) comprising an interior shaft and a concentric exterior shaft over said interior shaft, said exterior shaft having an outer diameter that is greater than the outer diameter of said interior shaft, wherein said exterior shaft terminates proximally of the distal end of said catheter and the interior shaft extends distally of the distal end of said exterior shaft; attaching an inflatable balloon (8) to said catheter so that the balloon is over the extending portion of said interior shaft and the distal end of said balloon is bonded to said interior shaft, and so that a distal-most portion of said interior shaft extends distally of said balloon; placing an expandable tubular stent as defined in Claim 1 over said balloon; and attaching an end piece over said distal-most portion of said interior shaft to retain said stent over said balloon, wherein said end piece has an outer diameter at least as great as the outer diameter of said stent.
Claim 7
Dependent Claim
24 words
The method of Claim 6, wherein the outer diameter of said end piece is substantially the same as the diameter of said exterior shaft.
Claim 8
Dependent Claim
25 words
The method of Claim 7, further comprising the step of inflating said balloon to test said balloon prior to placing said stent over said balloon.
Claim 9
Independent Claim
211 words
An apparatus comprising: an axially elongate catheter shaft (2) comprising at least one lumen (5) therethrough; an expandable balloon (8) mounted on said shaft (2) and in communication with said lumen (5); and a removably mounted, radially outwardly deformable and expandable tubular stent (18) in accordance with any of Claims 1 to 8, coaxially disposed about said balloon (8) said stent having an opening at each axial end and a central lumen therethrough, wherein said stent is radially expandable by deformation to a preselected configuration in response to pressure from said balloon, characterised in that the apparatus is for relieving the symptoms of hypertrophy of the prostate gland within the urethra of a mammal, and in that the catheter shaft (2) has an annular recess (15) thereon receiving the stent (18), the recess being defined axially at its distal end by a distal annular shoulder (18) whose outer diameter is at least as great as the outside diameter of said stent (18) in its unexpanded state, so that said stent (18) does not extend radially beyond the outer circumference of said distal annular shoulder (18), thereby protecting the lining of the urethra from damage due to sliding contact with said stent when said apparatus is inserted into the urethra in use.
References Cited (Backward Citations)
No citation records indexed.
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