Patent US3680553A successfully refreshed from Google Patents.
Patent EP0622059A1 successfully refreshed from Google Patents.
EP0622059A1
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Prostatic stent
Assignee: AMS Medinvent SA
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Filing: 1994-04-26
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Granted: —
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Expires: 2014-04-26
Abstract
Abstract A prostatic stent having an elongate body (13) defining a passage therethrough and comprising a distal section (17), a mid-section (19) and a proximal section (21), said elongate body (13) having a length sufficient to extend distally from a bladder neck (3) to a position somewhat short of the external sphincter (9), and said proximal section (21) having a shape conforming to the neck (3) of the urinary bladder (1); and processes for the manufacture of such prostatic stent of a metallic braided type.
Inventors
- 👤 Michael Mikulich
- 👤 Claude Clerc
- 👤 Michael Jedwab
- 👤 Adrian Furrer
- 👤 Alain Mariller
- 👤 John Burton
- 👤 Claude Tihon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/02; A61F2/04; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
69 words
A prostatic stent having an elongate body (13) defining a passage therethrough and comprising a distal section (17), a mid-section (19) and a proximal section (21), said elongate body (13) having a length sufficient to extend distally from a bladder neck (3) to a position.somewhat short of the external sphincter (9), and said proximal section (21) having a shape conforming to the neck (3) of the urinary bladder (1).
Claim 2
Dependent Claim
44 words
A prostatic stent according to claim 1, wherein the proximal end (23) of said proximal section (21) extends in a plane (P) sloping at an angle (α) to a normal (N) to a center line (L) of said body (13) not exceeding about 50°.
Claim 3
Dependent Claim
21 words
A prostatic stent according to claim 2, wherein said angle (α) lies within a range of about 5 to about 40°.
Claim 4
Dependent Claim
21 words
A prostatic stent according to claim 3, wherein said angle (α) lies within a range of about 10 to about 30°.
Claim 5
Dependent Claim
19 words
A prostatic stent according to any preceding claim, wherein said mid-section has a substantially constant cross-section along said mid-section.
Claim 6
Dependent Claim
30 words
A prostatic stent according to any preceding claim, wherein said proximal section (21) of the body (13) has a flare conforming to the tapered neck (3) of the bladder (1).
Claim 7
Dependent Claim
38 words
A prostatic stent according to any preceding claim, wherein said distal section (17) of the body (13) has a distally directed flare to prevent proximal migration of the stent (13) and to conform to the surrounding urethral wall.
Claim 8
Dependent Claim
34 words
A prostatic stent according to any of claims 1 to 6, wherein said distal section (17) of the body (13) has a distally directed taper so as not to interfere with the sphincter function.
Claim 9
Dependent Claim
18 words
A prostatic stent according to any preceding claim, wherein said body (13) has an approximately circular radial cross-section.
Claim 10
Dependent Claim
28 words
A prostatic stent according to any of claims 1 to 8, wherein said body (13) has a non-circular radial cross-section for improved conformation to the surrounding urethral wall.
Claim 11
Dependent Claim
18 words
A prostatic stent according to claim 10, wherein said non-circular radial cross-section has a flattened or oval shape.
Claim 12
Dependent Claim
14 words
A prostatic stent according to any preceding claim, which is of a self-expandable type.
Claim 13
Dependent Claim
105 words
A prostatic stent according to claim 12, which is of the braided type comprising a flexible tubular body which has a diameter that is variable by axial movement of the ends of the body relative to each other and which is composed of several individual rigid but flexible thread elements each of which extends in helix configuration with the center line of the body as a common axis, a number of elements having the same direction of winding but being axially displaced relative to each other crossing a number of elements also axially displaced relative to each other but having the opposite direction of winding.
Claim 14
Dependent Claim
32 words
A prostatic stent according to claim 13, wherein said proximal end (23) of said body (13) extends in a plane that is substantially parallel to the oppositely extending filaments in the stent.
Claim 15
Dependent Claim
84 words
A prostatic stent having an elongate body (13) defining a passage therethrough, and comprising a proximal section (21) having a flaring and oblique proximal end (23) conforming both radially and axially to the walls of the surrounding bladder neck (3), further comprising a mid-section (19) having a substantially constant cross-section along said mid-section, and a distal section (17), said elongate body (13) having a length sufficient to extend distally from a bladder neck (3) to a position somewhat short of the external sphincter (9).
Claim 16
Dependent Claim
13 words
A prostatic stent according to claim 15, which is of a self-expandable type.
Claim 17
Dependent Claim
105 words
A prostatic stent according to claim 16, which is of the braided type comprising a flexible tubular body which has a diameter that is variable by axial movement of the ends of the body relative to each other and which is composed of several individual rigid but flexible thread elements each of which extends in helix configuration with the center line of the body as a common axis, a number of elements having the same direction of winding but being axially displaced relative to each other crossing a number of elements also axially displaced relative to each other but having the opposite direction of winding.
Claim 18
Dependent Claim
153 words
A process for the manufacture of a metallic braided prostatic stent having an elongate body (13) defining a passage therethrough, and comprising a proximal section (21) having a flaring and oblique proximal end (23) conforming both radially and axially to the walls of the surrounding bladder neck (3), further comprising a mid-section (19) having a substantially constant cross-section along said mid-section, and a distal section (17), said process comprising the steps: a) preparing a braided hollow, deformable body having substantially straight cylindrical walls; b) mounting the body resulting from step a) onto a mandrel with a shape corresponding to the desired shape of the finished stent; c) applying energy or external pressure or both onto said body positioned on said mandrel to cause said body to conform to the shape of the mandrel; d) removing the thus shaped body from the mandrel; and e) cutting the proximal end (23) to the desired obliqueness.
Claim 19
Dependent Claim
136 words
A process for the manufacture of a metallic braided prostatic stent having an elongate body (13) defining a passage therethrough, and comprising a proximal section (21) having a flaring and oblique proximal end (23) conforming both radially and axially to the walls of the surrounding bladder neck (3), further comprising a mid-section (19) having a substantially constant diameter, and a distal section (17), said process comprising the steps: a) providing a braiding bar with a shape corresponding to the shape of the finished stent; b) preparing a braided body by performing the braiding of the filaments on said braiding bar; c) removing said braided body from said braiding bar, optionally after the application of energy and/or pressure of said body while placed on said bar; and d) cutting the proximal end (23) to the desired obliqueness.
Claim 20
Dependent Claim
182 words
A process for the manufacture of a metallic braided prostatic stent having an elongate body (13) defining a passage therethrough, and comprising a proximal section (21) having a flaring and oblique proximal end (23) conforming both radially and axially to the walls of the surrounding bladder neck (3), further comprising a mid-section (19) having a substantially constant diameter, and a distal section (17), said process comprising the steps: a) providing a braiding bar, the radial cross-section of which is substantially constant along its entire length; b) preparing a braided body by performing the braiding at varying axial speed of said braiding bar to obtain a varying angle between the crossing filaments along said bar; c) mounting the body resulting from step b) onto a mandrel with a shape corresponding to the desired shape of the finished stent; d) applying energy and/or pressure to said body when placed on said mandrel to cause said body to conform to the shape of the mandrel and removing the thus shaped body from the mandrel; and e) cutting the proximal end (23) to the desired obliqueness.
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