US5019102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-refluxive internal ureteral stent with a dynamic hood-valve at the vesical end for prevention of urinary reflux into the upper urinary tract upon increase of vesical pressure
Assignee: Individual
•
Filing: 1988-12-07
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Granted: 1991-05-28
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Expires: 2008-12-07
Abstract
Abstract An anti-refluxive internal ureteral stent includes a ureteral catheter which is closed at its renal end and is provided with lateral perforations only in the upper and middle portions thereof. The stent includes a hood-valve at it vesical end to prevent urinary reflux. The hood-valve comprises a hood-shaped plastic foil that partially surrounds the external circumferential surface of the catheter at the oblique vesical end opening. The hood-valve is open in its resting state so as to allow the urine to flow out through the vesical outlet, unimpeded by the hood-valve, and folds over to close the vesical outlet in response to a reflux pressure generated due to a pressure differential between the catheter and the bladder. The valve remains closed until the pressure differential subsides. The urine flows into the catheter via multiple lateral openings in the upper and middle portions thereof. A gelatin cap generally enclosing the valve may be slipped over the vesical end of the catheter to serve as a stop for the guide-wire during insertion of the stent in a patient. The gelatin cap is pushed off by the guide-wire into the bladder where is it dissolved in the urine. This arrangement permits insertion of the catheter from above without damaging hood-valve during surgical procedures.
Inventors
- 👤 Eberhard Hoene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/0069; A61M25/0074; A61M25/0075; A61M27/00; A61M27/002; A61M27/008; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2002/048; A61M2210/00; A61M2210/10; A61M2210/1078
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
118 words
An anti-refluxive internal ureteral stent, comprising: a) a catheter having an open end; b) hood valve means secured to said catheter adjacent said one end and having open and closed positions for opening and closing the opening thereof; c) said hood valve means being actuated by a reflux pressure to assume said closed position; d) said hood valve means including a flap member having a first free end portion; and e) said flap member extending a distance beyond the open end so that when said hood valve means assumes said closed position, said flap member folds over thereby completely covering the open end and said first free end portion thereof extends beyond the perimeter of the open end.
Claim 2
Dependent Claim
118 words
An anti-refluxive internal ureteral stent, comprising: a) a catheter having an open end; b) hood valve means secured to said catheter adjacent said one end and having open and closed positions for opening and closing the opening thereof; c) said hood valve means being actuated by a reflux pressure to assume said closed position; d) said hood valve means including a flap member having a first free end portion; and e) said flap member extending a distance beyond the open end so that when said hood valve means assumes said closed position, said flap member folds over thereby completely covering the open end and said first free end portion thereof extends beyond the perimeter of the open end.
Claim 3
Dependent Claim
20 words
The ureteral stent of claim 1, wherein: a) said flap member assumes said open position when said reflux pressure subsides.
Claim 4
Dependent Claim
16 words
The ureteral stent of claim 1, wherein: a) said flap member is generally C-shaped in cross-section.
Claim 5
Dependent Claim
28 words
The internal stent of claim 1, wherein: a) said flap member includes a second end portion affixed to said catheter a distance away from the open end thereof.
Claim 6
Dependent Claim
32 words
The ureteral stent of claim 4, wherein: a) said second end portion of said flap member is affixed to an external circumferential surface of said catheter in a partial surrounding relationship thereto.
Claim 7
Dependent Claim
27 words
The ureteral stent of claim 5, wherein: a) said second end portion of said flap member surrounds about two-thirds of the external circumferential surface of said catheter.
Claim 8
Dependent Claim
17 words
The ureteral stent of claim 4, wherein: a) said distance is about the diameter of said catheter.
Claim 9
Dependent Claim
17 words
The ureteral stent of claim 1, wherein: a) said flap member is made of an elastic material.
Claim 10
Dependent Claim
23 words
The ureteral stent of claim 1, wherein: a) the open end of said catheter is inclined so that it faces said flap member.
Claim 11
Dependent Claim
25 words
The ureteral stent of claim 1, further including: a) straightening means removably insertable in said catheter for proper positioning of the stent in a patient.
Claim 12
Dependent Claim
24 words
The ureteral stent of claim 10, further including: a) stop means for preventing withdrawal of said catheter when said straightening means is removed therefrom.
Claim 13
Dependent Claim
27 words
The ureteral stent of claim 11, wherein: a) said stop means includes a tubular member having an inside diameter larger than the outside diameter of said catheter.
Claim 14
Dependent Claim
19 words
The ureteral stent of claim 12, wherein: a) said catheter includes abutment means for positioning said tubular member thereon.
Claim 15
Dependent Claim
57 words
The ureteral stent of claim 13, wherein: a) said abutment means includes a ring-shaped member with a notch; and b) said tubular member includes a projection member to be received in said notch for securing said stop means on said catheter; c) wherein a rotation of said stop means is transmitted into simultaneous rotation of said catheter.
Claim 16
Dependent Claim
22 words
The ureteral stent of claim 1, further including: a) means for protecting said hood-valve means while implanting the stent in a patient.
Claim 17
Dependent Claim
26 words
The ureteral stent of claim 15, wherein: a) said valve protecting means includes a cap to be removably secured over said open end of said catheter.
Claim 18
Dependent Claim
16 words
The ureteral stent of claim 16, wherein: a) said cap is made of a water-soluble material.
References Cited (Backward Citations)
DE1250704B
Cited
FR2133083A5
Cited
US3965900A
Cited
US3999551A
Cited
FR2409747A1
Cited
WO1980001507A1
Cited
US4334327A
Cited
US4512770A
Cited
DE3339179A1
Cited
US4574806A
Cited
US4643732A
Cited
US4671795A
Cited
US4759758A
Cited
EP0208841A2
Cited
US4685905A
Cited
DE8614013U1
Cited
FR2611486A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |