US5667486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prostatic stent
Assignee: AMS Medinvent SA
•
Filing: 1994-04-26
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Granted: 1997-09-16
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Expires: 2014-04-26
Abstract
Abstract A prostatic stent and method of manufacture. The stent has an elongate body defining a passage therethrough and includes a distal section, a mid-section and a proximal section. The elongate body has a length sufficient to extend distally from a bladder neck to a position somewhat short of the external sphincter. The proximal section has a shape conforming to the neck of the urinary bladder.
Inventors
- 👤 Michael A. Mikulich
- 👤 Claude O. Clerc
- 👤 Michael R. Jedwab
- 👤 Adrian Furrer
- 👤 Alain Mariller
- 👤 John H. Burton
- 👤 Claude Tihon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:23
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: 17
Claim 1
Independent Claim
181 words
A prostatic stent comprising an elongate body having a proximal end, a distal end and a passageway extending therebetween and including a distal section, a mid-section and a proximal section, with said elongate body being of a length sufficient to extend from a urinary bladder neck defining a shape to a position proximally of an external sphincter, said distal section having a distally directed flare adapted to conform to a surrounding urethral wall and to prevent proximal migration of the stent, said proximal section having a first terminus with said proximal end being the first terminus of said proximal section and extending in a plane sloping at an angle α of not more than about 50° to a normal to a central axis of said body, with the slope of said proximal end being such that the proximal end is configured to conform to said neck and adapted to be closely received within the entrance to the bladder and with said proximal section being elastic and being sized and configured and adapted to substantially conform to the shape of said neck.
Claim 2
Dependent Claim
181 words
A prostatic stent comprising an elongate body having a proximal end, a distal end and a passageway extending therebetween and including a distal section, a mid-section and a proximal section, with said elongate body being of a length sufficient to extend from a urinary bladder neck defining a shape to a position proximally of an external sphincter, said distal section having a distally directed flare adapted to conform to a surrounding urethral wall and to prevent proximal migration of the stent, said proximal section having a first terminus with said proximal end being the first terminus of said proximal section and extending in a plane sloping at an angle α of not more than about 50° to a normal to a central axis of said body, with the slope of said proximal end being such that the proximal end is configured to conform to said neck and adapted to be closely received within the entrance to the bladder and with said proximal section being elastic and being sized and configured and adapted to substantially conform to the shape of said neck.
Claim 3
Dependent Claim
21 words
The stent according to claim 1 wherein said angle α lies within a range of from about 5° to about 40°.
Claim 4
Dependent Claim
21 words
The stent according to claim 2 wherein said angle α lies within a range of from about 10° to about 30°.
Claim 5
Dependent Claim
31 words
The sent according to claim 1 wherein said mid-section has a substantially constant cross-section along the mid-section, the cross-section having a cross sectional area and shape substantially constant along the mid-section.
Claim 6
Dependent Claim
16 words
The stent according to claim 1 wherein said elongate body is substantially circular in cross section.
Claim 7
Dependent Claim
15 words
The stent according to claim 5 wherein said elongate body is non-circular in cross section.
Claim 8
Dependent Claim
15 words
The stent according to claim 6 wherein said non-circular cross section is an oval configuration.
Claim 9
Dependent Claim
11 words
The stent according to claim 1 wherein said body is self-expandable.
Claim 10
Dependent Claim
12 words
The stent according to claim 8 wherein said body comprises braided filaments.
Claim 11
Dependent Claim
142 words
A prostatic stent comprising an elongate body having a wall structure defining a passage therethrough, said body being formed of braided filaments and with said wall having openings between said braided filaments, said body further comprising a proximal section including a flared and oblique proximal end adapted to conform both radially and axially to an inner surface of a surrounding bladder neck, a mid-section having a substantially constant cross-section with a cross sectional area and shape being substantially constant along the mid-section, and a distal section having a distally directed flare adapted to conform to a surrounding urethral wall and to prevent proximal migration of the stent, said elongate body having a length sufficient to extend distally from said bladder neck to a position proximally of an external sphincter, said wall being adapted to enable growth of natural tissue into said stent.
Claim 12
Dependent Claim
142 words
A prostatic stent comprising an elongate body having a wall structure defining a passage therethrough, said body being formed of braided filaments and with said wall having openings between said braided filaments, said body further comprising a proximal section including a flared and oblique proximal end adapted to conform both radially and axially to an inner surface of a surrounding bladder neck, a mid-section having a substantially constant cross-section with a cross sectional area and shape being substantially constant along the mid-section, and a distal section having a distally directed flare adapted to conform to a surrounding urethral wall and to prevent proximal migration of the stent, said elongate body having a length sufficient to extend distally from said bladder neck to a position proximally of an external sphincter, said wall being adapted to enable growth of natural tissue into said stent.
Claim 13
Dependent Claim
11 words
The stent according to claim 10 wherein said body is self-expandable.
Claim 14
Dependent Claim
176 words
A prostatic stent comprising an elongate body having a proximal end, a distal end and a passageway extending therebetween and including a distal section, a mid-section and a proximal section, with said elongate body being of a length sufficient to extend from a urinary bladder neck defining a shape to a position proximally of an external sphincter, said distal section having a distally directed taper so that the stent does not interfere with said external sphincter, said proximal section having a first terminus with said proximal end being the first terminus of said proximal section and extending in a plane sloping at an angle α of not more than about 50° to a normal to a central axis of said body, with the slope of said proximal end being such that the proximal end is configured to conform to said neck and adapted to be closely received within the entrance to the bladder and with said proximal section being elastic and being sized and configured and adapted to substantially conform to the shape of said neck.
Claim 15
Dependent Claim
176 words
A prostatic stent comprising an elongate body having a proximal end, a distal end and a passageway extending therebetween and including a distal section, a mid-section and a proximal section, with said elongate body being of a length sufficient to extend from a urinary bladder neck defining a shape to a position proximally of an external sphincter, said distal section having a distally directed taper so that the stent does not interfere with said external sphincter, said proximal section having a first terminus with said proximal end being the first terminus of said proximal section and extending in a plane sloping at an angle α of not more than about 50° to a normal to a central axis of said body, with the slope of said proximal end being such that the proximal end is configured to conform to said neck and adapted to be closely received within the entrance to the bladder and with said proximal section being elastic and being sized and configured and adapted to substantially conform to the shape of said neck.
Claim 16
Dependent Claim
162 words
A prostatic stent comprising an elongate body defining a passage therethrough, a proximal section including a flared and oblique proximal end, with each said proximal section and said proximal end being configured and adapted to closely conform both radially and axially to fit snugly to an inner surface of a surrounding bladder neck, said proximal end extending in a plane sloping at an angle α to a normal to a central axis of said body, a not exceeding about 50° and being such that the proximal end is adapted to be received within the entrance to the bladder, a mid-section having a substantially constant cross section along a length and a distal section having a distally directed flare adapted to conform to a surrounding urethral wall and to prevent proximal migration of the stent, said body comprising braided filaments with said elongate body having a length sufficient to extend distally from said bladder neck to a position proximally of an external sphincter.
Claim 17
Dependent Claim
162 words
A prostatic stent comprising an elongate body defining a passage therethrough, a proximal section including a flared and oblique proximal end, with each said proximal section and said proximal end being configured and adapted to closely conform both radially and axially to fit snugly to an inner surface of a surrounding bladder neck, said proximal end extending in a plane sloping at an angle α to a normal to a central axis of said body, a not exceeding about 50° and being such that the proximal end is adapted to be received within the entrance to the bladder, a mid-section having a substantially constant cross section along a length and a distal section having a distally directed flare adapted to conform to a surrounding urethral wall and to prevent proximal migration of the stent, said body comprising braided filaments with said elongate body having a length sufficient to extend distally from said bladder neck to a position proximally of an external sphincter.
References Cited (Backward Citations)
US3818511A
Cited
US4655771A
Cited
US4655771B1
Cited
EP0183372A1
Cited
US4822333A
Cited
US5061275A
Cited
FR2611486A1
Cited
WO1989001798A1
Cited
EP0323818A1
Cited
US4994066A
Cited
GB2227175A
Cited
US4955859A
Cited
US5059169A
Cited
US4973301A
Cited
WO1991016005A1
Cited
US5269802A
Cited
DE4130431A1
Cited
US5354309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-15 | 2001-03-17 | 2001-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-15 | 2005-03-17 | 2005-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-15 | 2009-03-17 | 2009-09-16 | $7700.00 | Window Closed / Lapsed |