US4731083A
Expired / Lapsed
US
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Manually actuated hydraulic sphincter
Assignee: Johns Hopkins University
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Filing: 1985-08-29
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Granted: 1988-03-15
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Expires: 2005-08-29
Abstract
Abstract An implantable hydraulic urinary sphincter system is disclosed for maintaining continence in those patients unable to control or stop inadvertent urrinary flow. The invented apparatus generally consists of an artificial urinary sphincter and a control means for obtaining continence while causing the artificial sphincter to apply mininmal pressure to the urethra for all conditions of the bladder. The invented apparatus: (1) automatically causes sphincter fluid pressure to increase or decrease with sensed bladder and/or abdominal pressure, and (2) is manually actuated by the patient when he or she desires to urinate. The invented apparatus can be filled with fluid, or the fluid pressure can be reset, after implantation without necessitating a surgical procedure.
Inventors
- 👤 Robert E. Fischell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/0004; A61F2/0031; A61F2/0036; A61F2/004; Y; Y10; Y10S; Y10S128/00; Y10S128/25
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
276 words
An implantable hydraulic urinary sphincter system comprising: a control unit contained in a casing and implanted in a subcutaneous position, comprising: an actuation chamber filled with an incompressible actuation fluid, said actuation chamber mounted inside said casing, a first wall of said actuation chamber containing a flexible actuation diaphragm positioned on said casing, at least part of said first wall of said actuation chamber containing an outer septum, a second wall of said actuation chamber containing at least one extensible portion, pressing on said flexible actuation diaphragm causes said at least one extensible portion to elongate, at least part of said second wall including an inner septum, said inner septum located below said outer septum; a sphincter fluid chamber filled with an incompressible sphincter fluid, said sphincter fluid chamber mounted inside said casing, the second wall of said actuation chamber also forming at least part of one wall of said sphincter fluid chamber, an additional wall of said sphincter fluid chamber containing an elastic diaphragm, said elastic diaphragm maintaining said sphincter fluid at a minimum pressure, said sphincter fluid chamber positioned adjacent to said actuation chamber such that said at least one extensible portion when elongated presses against said elastic diaphragm increasing the volume of said sphincter fluid chamber and decreasing the pressure on said sphincter fluid thereby allowing said patient to urinate; and, an artificial sphincter directly coupled hydraulically to said sphincter fluid chamber, said artificial sphincter chamber being pressurized at a fluid pressure essentially equal to said sphincter fluid; and, an access means for selectively accessing fluid in said actuation fluid chamber and said sphincter fluid chamber after said control unit has been implanted.
Claim 2
Dependent Claim
276 words
An implantable hydraulic urinary sphincter system comprising: a control unit contained in a casing and implanted in a subcutaneous position, comprising: an actuation chamber filled with an incompressible actuation fluid, said actuation chamber mounted inside said casing, a first wall of said actuation chamber containing a flexible actuation diaphragm positioned on said casing, at least part of said first wall of said actuation chamber containing an outer septum, a second wall of said actuation chamber containing at least one extensible portion, pressing on said flexible actuation diaphragm causes said at least one extensible portion to elongate, at least part of said second wall including an inner septum, said inner septum located below said outer septum; a sphincter fluid chamber filled with an incompressible sphincter fluid, said sphincter fluid chamber mounted inside said casing, the second wall of said actuation chamber also forming at least part of one wall of said sphincter fluid chamber, an additional wall of said sphincter fluid chamber containing an elastic diaphragm, said elastic diaphragm maintaining said sphincter fluid at a minimum pressure, said sphincter fluid chamber positioned adjacent to said actuation chamber such that said at least one extensible portion when elongated presses against said elastic diaphragm increasing the volume of said sphincter fluid chamber and decreasing the pressure on said sphincter fluid thereby allowing said patient to urinate; and, an artificial sphincter directly coupled hydraulically to said sphincter fluid chamber, said artificial sphincter chamber being pressurized at a fluid pressure essentially equal to said sphincter fluid; and, an access means for selectively accessing fluid in said actuation fluid chamber and said sphincter fluid chamber after said control unit has been implanted.
Claim 3
Dependent Claim
29 words
The apparatus of claim 1, wherein said access means comprises: a needle for simultaneously penetrating said outer, and said inner septums and for accessing fluid in said control unit.
Claim 4
Dependent Claim
18 words
The apparatus of claim 2, wherein said needle means is a non-coring hypodermic needle having a side hole.
Claim 5
Dependent Claim
52 words
The apparatus of claim 2, wherein said side hole is positioned a first distance from the tip of said needle means, said first distance allowing said needle means selective access to fluid in said actuation chamber when said tip of said needle means is positioned abutting the bottom of said inside casing.
Claim 6
Dependent Claim
62 words
The apparatus of claim 2, wherein said side hole is positioned a second distance from the tip of said needle means, said second distance allowing said needle means selective access to fluid in said sphincter fluid chamber when said tip of said needle means is positioned abutting the bottom of said inside casing thereby allowing physician to set said minimum sphincter pressure.
Claim 7
Dependent Claim
18 words
The apparatus of claim 1, wherein said outer, and said inner septums are made from a self-sealing material.
Claim 8
Dependent Claim
19 words
The apparatus of claim 4 futher including a pressure gauge connected to said needle means for measuring fluid pressure.
Claim 9
Dependent Claim
17 words
The apparatus of claim 4 further including a syringe connected to said needle means for removing fluid.
Claim 10
Dependent Claim
81 words
The apparatus of claim 2, wherein said needle means includes a first and a second non-coring hypodermic needle, each having a side hole, each of said two hypodermic needles connected to a pressure gauge, and the side hole of said first hypodermic needle is adapted to be inserted in fluid communication with said actuation chamber and said second hypodermic needle in fluid connected with said sphincter fluid chamber, so that fluid pressure in each fluid chamber chamber can be simultaneously monitored.
Claim 11
Dependent Claim
80 words
The apparatus of claim 2, wherein said needle means includes a first and a second non-coring hypodermic needles each having a side hole, each of said at least two hypodermic needles connected to a syringe and the side hole of said first hypodermic needle is adapted to be inserted in fluid connected said actuation chamber and said second hypodermic needle in fluid communication with said sphincter fluid chamber, so that the fluid volume in each chamber can be simultaneously adjusted.
Claim 12
Dependent Claim
172 words
An implantable hydraulic urinary sphincter system comprising: a control unit contained in a casing and implanted in a subcutaneous position, comprising: a first chamber filled with an incompressible fluid, said first chamber mounted inside said causing, a second chamber filled with an incompressible fluid, said second chamber mounted inside said casing and below said first chamber, one wall of said first chamber also forming at least part of a wall of said second chamber, an outer septum mounted on said casing and forming part of said first chamber, an inner septum forming part of said wall formed between said first and second chambers and located below said outer septum; and, a needle means including at least two non-coring hypodermic needles, each having a side hole, each of said at least two hypodermic needles connected to a pressure gauge, and each of said at least two hypodermic needles is adapted to be inserted in fluid communication with a different fluid chamber, so that fluid pressure in each fluid chamber can be simultaneously monitored.
Claim 13
Dependent Claim
172 words
An implantable hydraulic urinary sphincter system comprising: a control unit contained in a casing and implanted in a subcutaneous position, comprising: a first chamber filled with an incompressible fluid, said first chamber mounted inside said causing, a second chamber filled with an incompressible fluid, said second chamber mounted inside said casing and below said first chamber, one wall of said first chamber also forming at least part of a wall of said second chamber, an outer septum mounted on said casing and forming part of said first chamber, an inner septum forming part of said wall formed between said first and second chambers and located below said outer septum; and, a needle means including at least two non-coring hypodermic needles, each having a side hole, each of said at least two hypodermic needles connected to a pressure gauge, and each of said at least two hypodermic needles is adapted to be inserted in fluid communication with a different fluid chamber, so that fluid pressure in each fluid chamber can be simultaneously monitored.
Claim 14
Dependent Claim
171 words
An implantable hydraulic urinary sphincter system comprising: a control unit contained in a casing and implanted in a subcutaneous position, comprising: a first chamber filled with an incompressible fluid, said first chamber mounted inside said casing, a second chamber filled with an incompressible fluid, said second chamber mounted inside said casing, and below said first chamber, one wall of said first chamber also forming at least part of a wall of said second chamber, an outer septum mounted on said casing and forming part of said first chamber, an inner septum forming part of said wall formed between said first and second chambers and located below said outer septum; and, a needle means including at least two non-coring hypodermic needles, each having a side hole, each of said at least two hypodermic needles connected to a syringe, and each of said at least two hypodermic needles is adapted to be inserted in fluid communication with a different fluid chamber, so that the fluid volume in each chamber can be simultaneously adjusted.
Claim 15
Dependent Claim
171 words
An implantable hydraulic urinary sphincter system comprising: a control unit contained in a casing and implanted in a subcutaneous position, comprising: a first chamber filled with an incompressible fluid, said first chamber mounted inside said casing, a second chamber filled with an incompressible fluid, said second chamber mounted inside said casing, and below said first chamber, one wall of said first chamber also forming at least part of a wall of said second chamber, an outer septum mounted on said casing and forming part of said first chamber, an inner septum forming part of said wall formed between said first and second chambers and located below said outer septum; and, a needle means including at least two non-coring hypodermic needles, each having a side hole, each of said at least two hypodermic needles connected to a syringe, and each of said at least two hypodermic needles is adapted to be inserted in fluid communication with a different fluid chamber, so that the fluid volume in each chamber can be simultaneously adjusted.
References Cited (Backward Citations)
US4433440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |