US5322501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continent urethral stent for treating and preventing urethral stricture after surgery
Assignee: Individual
•
Filing: 1992-10-02
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Granted: 1994-06-21
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Expires: 2012-10-02
Abstract
Abstract Disclosed is an apparatus and method for treating and preventing urethral stricture following surgery. The apparatus comprises a hollow cylindrical stent having a normally-expanded, contractible locating member attached at one end and a retrieving string attached at the other end. The contractible locating member is attached to the tube by two flexible strings. The contractible locating member is adjusted to its contracted condition by a cylindrical pusher prior to insertion into the bladder through the urethra. Once the contractible locating member is located in the bladder, the pusher is removed to permit the contractible locating member to return to its normally-expanded condition to provide an anchor in the bladder neck. The two strings connecting the stent and the contractible locating member are placed in the prostate and external sphincter, allowing the patient to remain continent. After healing is completed, the assembly can be retrieved by pulling the retrieving string.
Inventors
- 👤 Ayaz Mahmud-Durrani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:40
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/02; A61M25/04; A61M27/00; A61M27/002; A61M27/008; A61M2210/00; A61M2210/10; A61M2210/1078
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
94 words
A urethral stent assembly for insertion in a male urethra and bladder, comprising: a stent comprising a hollow cylindrical tube having an inner end and an outer end; locating means for placement in the bladder for fixing the position of said tube in the urethra, said locating means having a normally expanded condition and being selectively adjustable to a contracted condition; and flexible connecting means for placement in the prostatic urethra and connecting said inner end of said tube to said locating means, said flexible connecting means being separate from said hollow cylindrical tube.
Claim 2
Dependent Claim
94 words
A urethral stent assembly for insertion in a male urethra and bladder, comprising: a stent comprising a hollow cylindrical tube having an inner end and an outer end; locating means for placement in the bladder for fixing the position of said tube in the urethra, said locating means having a normally expanded condition and being selectively adjustable to a contracted condition; and flexible connecting means for placement in the prostatic urethra and connecting said inner end of said tube to said locating means, said flexible connecting means being separate from said hollow cylindrical tube.
Claim 3
Dependent Claim
20 words
The urethral stent assembly of claim 1, further comprising adjustment means for adjusting said locating means to said contracted condition.
Claim 4
Dependent Claim
41 words
The urethral stent assembly of claim 1, wherein said locating means comprises a leading tip, a trailing tip, and a normally-expanded, contractible connecting portion connecting said leading tip and said trailing tip, said connecting portion having a fluid flow path therethrough.
Claim 5
Dependent Claim
36 words
The urethral stent assembly of claim 3, wherein said connecting portion comprises multiple ribbons separated from each other along at least a portion of their length, said ribbons being formed of a flexible and resilient material.
Claim 6
Dependent Claim
17 words
The urethral stent assembly of claim 3, further comprising adjustment means for contracting said contractible connecting portion.
Claim 7
Dependent Claim
31 words
The urethral stent assembly of claim 5, wherein said adjustment means comprises a cylindrical body axially slidable within said cylindrical tube and engageable with said leading tip of said locating means.
Claim 8
Dependent Claim
28 words
The urethral stent assembly of claim 1, wherein said assembly further comprises guiding means for guiding said tube into the urethra and said locating means into the bladder.
Claim 9
Dependent Claim
17 words
The urethral stent assembly of claim 7, wherein said guiding means comprises an axially elongated guide wire.
Claim 10
Dependent Claim
30 words
The urethral stent assembly of claim 1, wherein said assembly further comprises retrieving means for retrieving said tube, said locating means, and said connecting means from the bladder and urethra.
Claim 11
Dependent Claim
19 words
The urethral stent assembly of claim 9, wherein said retrieving means comprises a flexible string attached to said tube.
Claim 12
Dependent Claim
138 words
The urethral stent assembly for insertion in a male urethra and bladder, comprising: a stent comprising a hollow cylindrical tube having an inner end and an outer end; locating means for placement in the bladder for fixing the position of said tube in the urethra, said locating means having a normally expanded condition and being selectively adjustable to a contracted condition; and flexible connecting means for placement in the prostatic urethra and connecting said inner end of said tube to said locating means, said flexible connecting means being separate from said hollow cylindrical tube; wherein said flexible connecting means comprises string means of sufficient length for permitting the inner end of said hollow cylindrical tube to be positioned in the urethra outwardly of the external sphincter while said locating means remains in its expanded condition inside the bladder.
Claim 13
Dependent Claim
138 words
The urethral stent assembly for insertion in a male urethra and bladder, comprising: a stent comprising a hollow cylindrical tube having an inner end and an outer end; locating means for placement in the bladder for fixing the position of said tube in the urethra, said locating means having a normally expanded condition and being selectively adjustable to a contracted condition; and flexible connecting means for placement in the prostatic urethra and connecting said inner end of said tube to said locating means, said flexible connecting means being separate from said hollow cylindrical tube; wherein said flexible connecting means comprises string means of sufficient length for permitting the inner end of said hollow cylindrical tube to be positioned in the urethra outwardly of the external sphincter while said locating means remains in its expanded condition inside the bladder.
Claim 14
Dependent Claim
20 words
The urethral stent assembly of claim 11, further comprising adjustment means for adjusting said locating means to said contracted condition.
Claim 15
Dependent Claim
41 words
The urethral stent assembly of claim 11, wherein said locating means comprises a leading tip, a trailing tip, and a normally-expanded, contractible connecting portion connecting said leading tip and said trailing tip, said connecting portion having a fluid flow path therethrough.
Claim 16
Dependent Claim
36 words
The urethral stent assembly of claim 13, wherein said connecting portion comprises multiple ribbons separated from each other along at least a portion of their length, said ribbons being formed of a flexible and resilient material.
Claim 17
Dependent Claim
17 words
The urethral stent assembly of claim 13, further comprising adjustment means for contracting said contractible connecting portion.
Claim 18
Dependent Claim
31 words
The urethral stent assembly of claim 15, wherein said adjustment means comprises a cylindrical body axially slidable within said cylindrical tube and engageable with said leading tip of said locating means.
Claim 19
Dependent Claim
28 words
The urethral stent assembly of claim 11, wherein said assembly further comprises guiding means for guiding said tube into the urethra and said locating means into the bladder.
Claim 20
Dependent Claim
17 words
The urethral stent assembly of claim 17, wherein said guiding means comprises an axially elongated guide wire.
Claim 21
Independent Claim
151 words
A method for treating conditions of the male urethra, comprising the steps of: a) providing a stent comprising a hollow cylindrical tube having an inner end and an outer end; b) providing normally-expanded, but contractible locating means for fixing the position of said tube in the urethra; c) providing flexible connecting means for connecting said inner end of said tube to said locating means; d) providing a guide wire means for insertion into the urethra and for use in inserting said tube and said locating means into the urethra; e) adjusting the locating means to its contracted condition; f) inserting the locating means in the bladder and the stent into the urethra while the locating means is in its contracted condition, with the connecting means being positioned in the prostatic urethra; and g) allowing the locating means to resume its normally expanded condition after it has been located in the bladder.
Claim 22
Independent Claim
151 words
A method for treating conditions of the male urethra, comprising the steps of: a) providing a stent comprising a hollow cylindrical tube having an inner end and an outer end; b) providing normally-expanded, but contractible locating means for fixing the position of said tube in the urethra; c) providing flexible connecting means for connecting said inner end of said tube to said locating means; d) providing a guide wire means for insertion into the urethra and for use in inserting said tube and said locating means into the urethra; e) adjusting the locating means to its contracted condition; f) inserting the locating means in the bladder and the stent into the urethra while the locating means is in its contracted condition, with the connecting means being positioned in the prostatic urethra; and g) allowing the locating means to resume its normally expanded condition after it has been located in the bladder.
Claim 23
Dependent Claim
40 words
The method of claim 19, including the additional step of: (h) extracting the stent to cause the locating means to assume its contracted position and then move outwardly along the urethra until it clears the outer end of the urethra.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-20 | 1997-12-20 | 1998-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-20 | 2001-12-20 | 2002-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-20 | 2005-12-20 | 2006-06-21 | $7700.00 | Window Closed / Lapsed |