US20070078398A1 - Multi-branched anti-reflux valve - Google Patents
Multi-branched anti-reflux valveDownload PDFInfo
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- US20070078398A1 US20070078398A1US11/212,412US21241205AUS2007078398A1US 20070078398 A1US20070078398 A1US 20070078398A1US 21241205 AUS21241205 AUS 21241205AUS 2007078398 A1US2007078398 A1US 2007078398A1
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- proximal end
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- way valve
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- 230000000151anti-reflux effectEffects0.000titledescription2
- 239000012530fluidSubstances0.000claimsabstractdescription92
- 238000004891communicationMethods0.000claimsabstractdescription45
- 210000001175cerebrospinal fluidAnatomy0.000claimsdescription16
- 210000004556brainAnatomy0.000claimsdescription10
- 238000000034methodMethods0.000claimsdescription7
- 230000000903blocking effectEffects0.000claims6
- 210000004055fourth ventricleAnatomy0.000description3
- 210000003140lateral ventricleAnatomy0.000description3
- 230000002861ventricularEffects0.000description3
- 206010011732CystDiseases0.000description2
- 208000031513cystDiseases0.000description2
- 210000004303peritoneumAnatomy0.000description2
- 238000006467substitution reactionMethods0.000description2
- 208000003906hydrocephalusDiseases0.000description1
- 238000012986modificationMethods0.000description1
- 230000004048modificationEffects0.000description1
- 238000011160researchMethods0.000description1
- 210000003625skullAnatomy0.000description1
- 238000012546transferMethods0.000description1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
- A61M27/002—Implant devices for drainage of body fluids from one part of the body to another
- A61M27/006—Cerebrospinal drainage; Accessories therefor, e.g. valves
Definitions
- the present inventionrelates to a multi-branched anti-reflux valve. More specifically, the present invention relates to a system and method for draining fluid from multiple drainage sites within the human brain.
- Hydrocephalusis most often treated by surgically inserting a shunt.
- the shuntdiverts the flow of cerebrospinal fluid (“CSF”) from the ventricles of the brain to another area of the body where the CSF can be absorbed as part of the circulatory system.
- a shunttypically includes a ventricular catheter that is introduced through a burr hole in the skull and implanted in the patient's ventricle.
- a drainage catheterdelivers the CSF to its ultimate drainage site (e.g., the peritoneum).
- a valvemay be used to regulate the one-way flow of CSF from the patient's ventricle to the drainage site.
- a surgeonhas used multiple shunts. That is, a first shunt, having its own ventricular catheter and drainage catheter, is used to drain CSF from a first site, and a second shunt, having its own ventricular catheter and drainage catheter, is used to drain CSF from a second site.
- a shunt systemthat includes a first catheter having a proximal end and a distal end.
- the first catheterhas at least one opening adjacent to its distal end.
- a second catheterhas a proximal end and a distal end.
- the second catheterhas at least one opening adjacent to its distal end.
- a drainage catheterhas a proximal end and a distal end. The proximal end of the drainage catheter is in fluid communication with the proximal end of the first catheter and the proximal end of the second catheter.
- a first one-way valveis disposed in fluid communication with the first catheter between its proximal end and its at least one opening.
- the first one-way valvepermits fluid flow from the at least one opening to the proximal end with approximately zero opening pressure.
- the first one-way valveeffectively blocks fluid flow from the proximal end to the at least one opening.
- a second one-way valveis disposed in fluid communication with the second catheter between its proximal end and its at least one opening.
- the second one-way valvepermits fluid flow from the at least one opening to the proximal end with approximately zero opening pressure.
- the second one-way valveeffectively blocks fluid flow from the proximal end to the at least one opening.
- the two one-way valvescould both open with approximately zero opening pressure, or the two one-way valves could both open with a predetermined opening pressure that is greater than zero.
- FIG. 1Ais a partial sectional view showing a first catheter draining fluid from the lateral ventricle of the human brain, and a second catheter draining fluid from the fourth ventricle of a human brain;
- FIG. 1Bis a partial sectional view showing a first catheter draining fluid from a fluid filled cyst, and a second catheter draining fluid from the lateral ventricle;
- FIG. 2Ashows a plan view of a branched drainage conduit, with each conduit having a one-way valve that opens with a predetermined opening pressure that is greater than zero;
- FIG. 2Bshows a plan view of a branched drainage conduit, with each conduit having a one-way valve that opens with approximately zero opening pressure;
- FIG. 2Cshows a plan view of a branched drainage conduit, with one conduit having a one-way valve that opens with a predetermined opening pressure that is greater than zero and the other conduit having a one-way valve that opens with approximately zero opening pressure.
- FIGS. 1A-2Ca shunt system 10 in accordance with the present invention is illustrated.
- a first catheter 12having a proximal end and a distal end.
- the first catheterhas at least one opening adjacent to its distal end, as is known in the art.
- a second catheter 14has a proximal end and a distal end.
- the second catheteralso has at least one opening adjacent to its distal end.
- a drainage catheter 16has a proximal end and a distal end. The proximal end of the drainage catheter 16 is in fluid communication with the proximal end of the first catheter and the proximal end of the second catheter.
- a first one-way valve 18is disposed in fluid communication with the first catheter 12 between its proximal end and its at least one opening.
- the first one-way valvepermits fluid flow within the first catheter 12 from the at least one opening to the proximal end with approximately zero opening pressure.
- the first one-way valvealso effectively blocks fluid flow within the first catheter 12 from the proximal end to the at least one opening.
- a second one-way valve 20is disposed in fluid communication with the second catheter 14 between the proximal end and the at least one opening.
- the second one-way valve 20permits fluid flow within the second catheter 14 from the at least one opening to the proximal end with a predetermined opening pressure that is greater than zero.
- the second one-way valvealso effectively blocks fluid flow within the second catheter 14 from the proximal end to the at least one opening.
- the first one-way valve 18 and the second one-way valve 20can be, for example, ball and cone valves or diaphragm valves.
- the second one-way valve 20is preferably an adjustable valve so that the threshold or opening pressure that allows fluid flow through a shunt system may vary.
- the predetermined opening pressure of the second one-way valve 20can be adjusted non-invasively with means such as a wireless communications (e.g., magnetically) or a wireless telemetric communication, which includes the transfer of data or other information.
- the predetermined opening pressure of the second one-way valve 20is preferably programmable in the range from approximately 10 mm H 2 O to approximately 400 mm H 2 O, and more preferably from approximately 10 mm H 2 O to approximately 200 mm H 2 O.
- Connector 22 , 22 ′, 22 ′′that may be used to facilitate fluid handling is illustrated.
- Connector 22 , 22 ′, 22 ′′has a first port 24 , 24 ′, 24 ′′, a second port 26 , 26 ′, 26 ′′ and a third port 28 , 28 ′, 28 ′′.
- the first portis in fluid communication with the proximal end of the first catheter.
- the second portis in fluid communication with the proximal end of the second catheter, and the third port is in fluid communication with the proximal end of the drainage catheter.
- the distal end of the drainage catheteris typically placed in the peritoneum. But the fluid could be drained elsewhere in the body, or the system could be used to drain fluid externally from the body.
- a first one-way valveis placed in fluid communication with the first catheter between its proximal end and the at least one opening such that the first one-way valve permits fluid flow from the at least one opening to the proximal end with a predetermined opening pressure that is greater than zero.
- the first one-way valveeffectively blocks fluid flow from the proximal end to the at least one opening.
- a second one-way valveis placed in fluid communication with the second catheter between the proximal end and the at least one opening such that the second one-way valve permits fluid flow from the at least one opening to the proximal end with approximately zero opening pressure.
- the second one-way valveeffectively blocks fluid flow from the proximal end to the at least one opening.
- the distal end of the first cathetercan be placed, for example, in the lateral ventricle, and the distal end of the second catheter can be placed in the fourth ventricle.
- the distal end of the first cathetercan be placed, for example, in fluid communication with a fluid filled cyst 30 , and the distal end of the second catheter can be placed in the fourth ventricle.
- the two one-way valvescould both open with approximately zero opening pressure as shown in FIG. 2B .
- the two one-way valvescould both open with a predetermined opening pressure that is greater than zero as shown in FIG. 2A .
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Abstract
Description
- Not applicable.
- Not Applicable.
- The present invention relates to a multi-branched anti-reflux valve. More specifically, the present invention relates to a system and method for draining fluid from multiple drainage sites within the human brain.
- Hydrocephalus is most often treated by surgically inserting a shunt. The shunt diverts the flow of cerebrospinal fluid (“CSF”) from the ventricles of the brain to another area of the body where the CSF can be absorbed as part of the circulatory system. A shunt typically includes a ventricular catheter that is introduced through a burr hole in the skull and implanted in the patient's ventricle. A drainage catheter delivers the CSF to its ultimate drainage site (e.g., the peritoneum). Optionally, a valve may be used to regulate the one-way flow of CSF from the patient's ventricle to the drainage site.
- To drain fluid from more than one site, a surgeon has used multiple shunts. That is, a first shunt, having its own ventricular catheter and drainage catheter, is used to drain CSF from a first site, and a second shunt, having its own ventricular catheter and drainage catheter, is used to drain CSF from a second site.
- Occasionally the surgeon may have the need to drain fluid from multiple sites within the brain. If the surgeon were to modify the valve construct to drain from multiple sites with a simple Y-connector, cross draining may occur between the two sites within the brain as the CSF will travel along the path of least resistance. Thus, there is the need to provide surgeons with a device that will permit fluid to drain from multiple sites without cross draining occurring.
- The present invention provides these and other needs with a shunt system that includes a first catheter having a proximal end and a distal end. The first catheter has at least one opening adjacent to its distal end. A second catheter has a proximal end and a distal end. The second catheter has at least one opening adjacent to its distal end. A drainage catheter has a proximal end and a distal end. The proximal end of the drainage catheter is in fluid communication with the proximal end of the first catheter and the proximal end of the second catheter. A first one-way valve is disposed in fluid communication with the first catheter between its proximal end and its at least one opening. The first one-way valve permits fluid flow from the at least one opening to the proximal end with approximately zero opening pressure. The first one-way valve effectively blocks fluid flow from the proximal end to the at least one opening. A second one-way valve is disposed in fluid communication with the second catheter between its proximal end and its at least one opening. The second one-way valve permits fluid flow from the at least one opening to the proximal end with approximately zero opening pressure. The second one-way valve effectively blocks fluid flow from the proximal end to the at least one opening. Depending upon the needs of the surgeon however, the two one-way valves could both open with approximately zero opening pressure, or the two one-way valves could both open with a predetermined opening pressure that is greater than zero.
- The invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1A is a partial sectional view showing a first catheter draining fluid from the lateral ventricle of the human brain, and a second catheter draining fluid from the fourth ventricle of a human brain;FIG. 1B is a partial sectional view showing a first catheter draining fluid from a fluid filled cyst, and a second catheter draining fluid from the lateral ventricle;FIG. 2A shows a plan view of a branched drainage conduit, with each conduit having a one-way valve that opens with a predetermined opening pressure that is greater than zero;FIG. 2B shows a plan view of a branched drainage conduit, with each conduit having a one-way valve that opens with approximately zero opening pressure; andFIG. 2C shows a plan view of a branched drainage conduit, with one conduit having a one-way valve that opens with a predetermined opening pressure that is greater than zero and the other conduit having a one-way valve that opens with approximately zero opening pressure.- Referring now to
FIGS. 1A-2C , ashunt system 10 in accordance with the present invention is illustrated. Referring now toFIG. 1A , afirst catheter 12 having a proximal end and a distal end. The first catheter has at least one opening adjacent to its distal end, as is known in the art. Asecond catheter 14 has a proximal end and a distal end. The second catheter also has at least one opening adjacent to its distal end. Adrainage catheter 16 has a proximal end and a distal end. The proximal end of thedrainage catheter 16 is in fluid communication with the proximal end of the first catheter and the proximal end of the second catheter. A first one-way valve 18 is disposed in fluid communication with thefirst catheter 12 between its proximal end and its at least one opening. The first one-way valve permits fluid flow within thefirst catheter 12 from the at least one opening to the proximal end with approximately zero opening pressure. The first one-way valve also effectively blocks fluid flow within thefirst catheter 12 from the proximal end to the at least one opening. - A second one-
way valve 20 is disposed in fluid communication with thesecond catheter 14 between the proximal end and the at least one opening. The second one-way valve 20 permits fluid flow within thesecond catheter 14 from the at least one opening to the proximal end with a predetermined opening pressure that is greater than zero. The second one-way valve also effectively blocks fluid flow within thesecond catheter 14 from the proximal end to the at least one opening. The first one-way valve 18 and the second one-way valve 20 can be, for example, ball and cone valves or diaphragm valves. The second one-way valve 20 is preferably an adjustable valve so that the threshold or opening pressure that allows fluid flow through a shunt system may vary. U.S. Pat. Nos. 4,595,390, 4,615,691, 4,772,257, and 5,928,182 are exemplary typed of adjustable shunt valves, and the disclosures of which are all hereby incorporated by reference in their entirety. The predetermined opening pressure of the second one-way valve 20 can be adjusted non-invasively with means such as a wireless communications (e.g., magnetically) or a wireless telemetric communication, which includes the transfer of data or other information. The predetermined opening pressure of the second one-way valve 20 is preferably programmable in the range from approximately 10 mm H2O to approximately 400 mm H2O, and more preferably from approximately 10 mm H2O to approximately 200 mm H2O. - Referring now to
FIGS. 2A-2C , aconnector Connector first port second port third port - To use the
shunt system 10 to drain cerebral spinal fluid (CSF) from multiple sites within the brain the surgeon will place the proximal end of the drainage catheter in fluid communication with the proximal end of the first catheter and the proximal end of the second catheter. A first one-way valve is placed in fluid communication with the first catheter between its proximal end and the at least one opening such that the first one-way valve permits fluid flow from the at least one opening to the proximal end with a predetermined opening pressure that is greater than zero. The first one-way valve effectively blocks fluid flow from the proximal end to the at least one opening. A second one-way valve is placed in fluid communication with the second catheter between the proximal end and the at least one opening such that the second one-way valve permits fluid flow from the at least one opening to the proximal end with approximately zero opening pressure. The second one-way valve effectively blocks fluid flow from the proximal end to the at least one opening. - As illustrated in
FIG. 1A , the distal end of the first catheter can be placed, for example, in the lateral ventricle, and the distal end of the second catheter can be placed in the fourth ventricle. Alternatively, as illustrated inFIG. 1B , the distal end of the first catheter can be placed, for example, in fluid communication with a fluid filledcyst 30, and the distal end of the second catheter can be placed in the fourth ventricle. - Of course, however, depending upon the needs of the surgeon, the two one-way valves could both open with approximately zero opening pressure as shown in
FIG. 2B . Likewise, the two one-way valves could both open with a predetermined opening pressure that is greater than zero as shown inFIG. 2A . - It will be understood that the foregoing is only illustrative of the principles of the invention, and that various modifications can be made by those skilled in the art without departing from the scope and spirit of the invention. All references cited herein are expressly incorporated by reference in their entirety.
- One skilled in the art will appreciate further features and advantages of the invention based on the above-described embodiments. While there have been shown, described, and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions, substitutions, and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit and scope of the invention. For example, it is expressly intended that all combinations of those elements and/or steps, which perform substantially the same function, in substantially the same way, to achieve the same results are within the scope of the invention. Substitutions of elements from one described embodiment to another are also fully intended and contemplated. It is also to be understood that the drawings are not necessarily drawn to scale, but that they are merely conceptual in nature. Accordingly, the invention is not to be limited by what has been particularly shown and described, except as indicated by the appended claims. All publications and references cited herein are expressly incorporated herein by reference in their entirety.
Claims (21)
1. A shunt system comprising:
a first catheter having a proximal end and a distal end, said first catheter having at least one opening adjacent to said distal end;
a second catheter having a proximal end and a distal end, said second catheter having at least one opening adjacent to said distal end;
a drainage catheter having a proximal end and a distal end; said proximal end of said drainage catheter being in fluid communication with said proximal end of said first catheter and said proximal end of said second catheter;
a first one-way valve being disposed in fluid communication with said first catheter between said proximal end and said at least one opening, said first one-way valve permitting fluid flow from said at least one opening to said proximal end with approximately zero opening pressure, said first one-way valve effectively blocking fluid flow from said proximal end to said at least one opening; and
a second one-way valve being disposed in fluid communication with said second catheter between said proximal end and said at least one opening, said second one-way valve permitting fluid flow from said at least one opening to said proximal end with approximately zero opening pressure, said second one-way valve effectively blocking fluid flow from said proximal end to said at least one opening.
2. The system ofclaim 1 , wherein the first one-way valve is a ball and cone valve.
3. The system ofclaim 2 , wherein the second one-way valve is a ball and cone valve.
4. The system ofclaim 1 , further comprising a connector having a first port, a second port and a third port, said first port being in fluid communication with said proximal end of said first catheter, said second port being in fluid communication with said proximal end of said second catheter, and said third port being in fluid communication with said proximal end of said drainage catheter.
5. A shunt system comprising:
a first catheter having a proximal end and a distal end, said first catheter having at least one opening adjacent to said distal end;
a second catheter having a proximal end and a distal end, said second catheter having at least one opening adjacent to said distal end;
a drainage catheter having a proximal end and a distal end; said proximal end of said drainage catheter being in fluid communication with said proximal end of said first catheter and said proximal end of said second catheter;
a first one-way valve being disposed in fluid communication with said first catheter between said proximal end and said at least one opening, said first one-way valve permitting fluid flow from said at least one opening to said proximal end with approximately zero opening pressure, said first one-way valve effectively blocking fluid flow from said proximal end to said at least one opening; and
a second one-way valve being disposed in fluid communication with said second catheter between said proximal end and said at least one opening, said second one-way valve permitting fluid flow from said at least one opening to said proximal end with a predetermined opening pressure greater than zero, said second one-way valve effectively blocking fluid flow from said proximal end to said at least one opening.
6. The system ofclaim 5 , wherein the first one-way valve is a ball and cone valve.
7. The system ofclaim 6 , wherein the second one-way valve is a ball and cone valve.
8. The system ofclaim 7 , wherein the predetermined opening pressure of said second one-way valve is programmable by a wireless communication.
9. The system ofclaim 8 , wherein the predetermined opening pressure of said second one-way valve is programmable in the range from approximately 10 mm H2O to approximately 400 mm H2O.
10. The system ofclaim 9 , wherein the predetermined opening pressure of said second one-way valve is programmable in the range from approximately 10 mm H2O to approximately 200 mm H2O.
11. The system ofclaim 5 , further comprising a connector having a first port, a second port and a third port, said first port being in fluid communication with said proximal end of said first catheter, said second port being in fluid communication with said proximal end of said second catheter, and said third port being in fluid communication with said proximal end of said drainage catheter.
12. A shunt system comprising:
a first catheter having a proximal end and a distal end, said first catheter having at least one opening adjacent to said distal end;
a second catheter having a proximal end and a distal end, said second catheter having at least one opening adjacent to said distal end;
a drainage catheter having a proximal end and a distal end; said proximal end of said drainage catheter being in fluid communication with said proximal end of said first catheter and said proximal end of said second catheter;
a first one-way valve being disposed in fluid communication with said first catheter between said proximal end and said at least one opening, said first one-way valve permitting fluid flow from said at least one opening to said proximal end with a predetermined opening pressure greater than zero, said first one-way valve effectively blocking fluid flow from said proximal end to said at least one opening; and a second one-way valve being disposed in fluid communication with said second catheter between said proximal end and said at least one opening, said second one-way valve permitting fluid flow from said at least one opening to said proximal end with a predetermined opening pressure greater than zero, said second one-way valve effectively blocking fluid flow from said proximal end to said at least one opening.
13. The system ofclaim 12 , wherein the first one-way valve is a ball and cone valve.
14. The system ofclaim 13 , wherein the second one-way valve is a ball and cone valve.
15. The system ofclaim 14 , wherein the predetermined opening pressure of said first one-way valve is programmable by a wireless communication.
16. The system ofclaim 15 , wherein the predetermined opening pressure of said second one-way valve is programmable by a wireless communication.
17. The system ofclaim 16 , wherein the predetermined opening pressure of said first and second one-way valve is programmable in the range from approximately 10 mm H2O to approximately 400 mm H2O.
18. The system ofclaim 17 , wherein the predetermined opening pressure of said first and second one-way valve is programmable in the range from approximately 10 mm H2O to approximately 200 mm H2O.
19. A method of draining cerebral spinal fluid (CSF) from multiple sites within the brain with a first catheter having a proximal end and a distal end, said first catheter having at least one opening adjacent to said distal end; a second catheter having a proximal end and a distal end, said second catheter having at least one opening adjacent to said distal end; and a drainage catheter having a proximal end and a distal end; said method comprising the steps of:
placing said proximal end of said drainage catheter in fluid communication with said proximal end of said first catheter and said proximal end of said second catheter;
placing a first one-way valve in fluid communication with said first catheter between said proximal end and said at least one opening such that said first one-way valve permits fluid flow from said at least one opening to said proximal end with approximately zero opening pressure, and said first one-way valve effectively blocks fluid flow from said proximal end to said at least one opening; and
placing a second one-way valve in fluid communication with said second catheter between said proximal end and said at least one opening such that said second one-way valve permits fluid flow from said at least one opening to said proximal end with approximately zero opening pressure, said second one-way valve effectively blocks fluid flow from said proximal end to said at least one opening.
20. A method of draining cerebral spinal fluid (CSF) from multiple sites within the brain with a first catheter having a proximal end and a distal end, said first catheter having at least one opening adjacent to said distal end; a second catheter having a proximal end and a distal end, said second catheter having at least one opening adjacent to said distal end; and a drainage catheter having a proximal end and a distal end; said method comprising the steps of:
placing said proximal end of said drainage catheter in fluid communication with said proximal end of said first catheter and said proximal end of said second catheter;
placing a first one-way valve in fluid communication with said first catheter between said proximal end and said at least one opening such that said first one-way valve permits fluid flow from said at least one opening to said proximal end with approximately zero opening pressure, and said first one-way valve effectively blocks fluid flow from said proximal end to said at least one opening; and
placing a second one-way valve in fluid communication with said second catheter between said proximal end and said at least one opening such that said second one-way valve permits fluid flow from said at least one opening to said proximal end with a predetermined opening pressure greater than zero, said second one-way valve effectively blocks fluid flow from said proximal end to said at least one opening.
21. A method of draining cerebral spinal fluid (CSF) from multiple sites within the brain with a first catheter having a proximal end and a distal end, said first catheter having at least one opening adjacent to said distal end; a second catheter having a proximal end and a distal end, said second catheter having at least one opening adjacent to said distal end; and a drainage catheter having a proximal end and a distal end; said method comprising the steps of:
placing said proximal end of said drainage catheter in fluid communication with said proximal end of said first catheter and said proximal end of said second catheter;
placing a first one-way valve in fluid communication with said first catheter between said proximal end and said at least one opening such that said first one-way valve permits fluid flow from said at least one opening to said proximal end with a predetermined opening pressure greater than zero, and said first one-way valve effectively blocks fluid flow from said proximal end to said at least one opening; and
placing a second one-way valve in fluid communication with said second catheter between said proximal end and said at least one opening such that said second one-way valve permits fluid flow from said at least one opening to said proximal end with a predetermined opening pressure greater than zero, said second one-way valve effectively blocks fluid flow from said proximal end to said at least one opening.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/212,412US20070078398A1 (en) | 2005-08-27 | 2005-08-27 | Multi-branched anti-reflux valve |
| US12/772,847US9220877B2 (en) | 2005-08-27 | 2010-05-03 | Multi-branched anti-reflux valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/212,412US20070078398A1 (en) | 2005-08-27 | 2005-08-27 | Multi-branched anti-reflux valve |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12/772,847DivisionUS9220877B2 (en) | 2005-08-27 | 2010-05-03 | Multi-branched anti-reflux valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20070078398A1true US20070078398A1 (en) | 2007-04-05 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/212,412AbandonedUS20070078398A1 (en) | 2005-08-27 | 2005-08-27 | Multi-branched anti-reflux valve |
| US12/772,847Active2028-04-04US9220877B2 (en) | 2005-08-27 | 2010-05-03 | Multi-branched anti-reflux valve |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12/772,847Active2028-04-04US9220877B2 (en) | 2005-08-27 | 2010-05-03 | Multi-branched anti-reflux valve |
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| US (2) | US20070078398A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010000461A1 (en)* | 2008-07-02 | 2010-01-07 | C.Miethke Gmbh & Co Kg | Cerebrospinal fluid drainage |
| US20120232462A1 (en)* | 2009-12-23 | 2012-09-13 | Christoph Miethke | Implantable hydrocephalus shunt system |
| US20140276347A1 (en)* | 2013-03-15 | 2014-09-18 | University Of Rochester | Intraosseous shunts |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496299A (en)* | 2019-08-14 | 2019-11-26 | 福建医科大学附属第一医院 | A double-lumen catheter for continuous purification of cerebrospinal fluid |
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| US20110166495A1 (en)* | 2008-07-02 | 2011-07-07 | Christoph Miethke | Cerebrospinal fluid drainage |
| US9295821B2 (en) | 2008-07-02 | 2016-03-29 | Christoph Miethke | Cerebrospinal fluid drainage |
| US20120232462A1 (en)* | 2009-12-23 | 2012-09-13 | Christoph Miethke | Implantable hydrocephalus shunt system |
| US8870809B2 (en)* | 2009-12-23 | 2014-10-28 | Christoph Miethke Gmbh & Co Kg | Implantable hydrocephalus shunt system |
| US20140276347A1 (en)* | 2013-03-15 | 2014-09-18 | University Of Rochester | Intraosseous shunts |
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| US9220877B2 (en) | 2015-12-29 |
| US20100210992A1 (en) | 2010-08-19 |
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