Endovascular cerebrospinal fluid shunt

Patent metadata

Field	Value
Publication number	US-9737697-B2
Application number	US-201615294000-A
Country	US
Kind code	B2
Filing date	Oct 14, 2016
Priority date	Jan 29, 2009
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

An endovascular implantable shunt device for draining cerebrospinal fluid from a patient's subarachnoid space includes a shunt having opposed first and second ends, a one-way valve located at the first end of the shunt, a tip disposed at the second end, and a hollow passageway extending between the tip and one-way valve. The tip is constructed to penetrate a patient's sinus wall. Cerebrospinal fluid drains through the tip and out through the valve.

First claim

What is claimed is:

1. An endovascular implantable shunt device for draining cerebrospinal fluid from a patient's subarachnoid space to the venous system, the device comprising: a shunt having opposed first and second ends; a one-way valve located at the first end of the shunt; a tip disposed at the second end, said tip being constructed to penetrate a sinus wall of the patient; and a hollow passageway extending between the tip and one-way valve such that cerebrospinal fluid can be drained through the tip and out through the valve.

2. The shunt of claim 1 , wherein the tip includes a plurality of apertures into which the cerebrospinal fluid enters the tip.

3. The shunt of claim 1 , wherein the shunt includes an antithrombic coating.

4. The shunt of claim 1 , wherein said tip comprises a closed sharpened end.

5. The shunt of claim 1 , wherein said tip is a helical tip and defines a helix having a constant radius.

6. The shunt of claim 1 , wherein said first end is tapered.

7. The shunt of claim 1 , further comprising a projection between said first and second end, wherein said projection extends along a plane perpendicular to a line extending between said first and second ends of said shunt.

8. The shunt of claim 1 , wherein said one-way valve is oriented to block liquid from flowing from said first end toward said second end and to permit liquid to flow from said second end toward said first end.

9. The shunt of claim 1 , wherein said one-way valve is configured to be external to the patient's subarachnoid space.

10. A system for draining cerebrospinal fluid from a patient's subarachnoid space to the venous system, the system comprising:
an endovascular implantable shunt having opposed first and second ends, a one-way valve located at the first end of the shunt, and a tip disposed at the second end, said tip being constructed to penetrate a sinus wall of the patient, wherein the first and second ends are in fluid communication to enable the cerebrospinal fluid to be drained through the tip and out through the valve; and
a catheter for delivering percutaneously and implanting the shunt into the sinus wall.

11. A method for draining cerebrospinal fluid from a patient's subarachnoid space, the method comprising the steps of: providing a shunt having opposed first and second ends, a one-way valve located at the first end of the shunt, and a tip disposed at the second end, said tip being constructed to penetrate a sinus wall of the patient, wherein the first and second ends are in fluid communication to enable the cerebrospinal fluid to be drained through the tip and out through the valve; endovascularly delivering the shunt to the sinus wall; implanting the tip in the sinus wall of the patient; and draining cerebrospinal fluid from the patient.

12. An endovascular implantable shunt device for draining fluid from a patient's subarachnoid space to the venous system, the device comprising:
a shunt having opposed first and second ends capable of being deployed by an endovascular route through the venous system, said shunt being sized to pass through a sinus lumen;
a one-way valve located between the first end and the second end of the shunt; and
a tip disposed at the second end, said tip being constructed to penetrate tissue of the patient; and
a hollow passageway extending between the helical tip and one-way valve such that fluid can be drained through the helical tip and out through the valve.

13. The shunt of claim 12 , wherein said one-way valve is configured to be external to the patient's subarachnoid space.

14. The shunt of claim 12 , wherein said tip comprises a closed sharpened end.

15. The shunt of claim 12 , wherein said tip defines a helix having constant radius.

16. The shunt of claim 12 , wherein said first end is tapered.

17. The shunt of claim 12 , further comprising a projection between said first and second end, wherein said projection extends along a plane perpendicular to a line extending between said first and second ends of said shunt.

18. The shunt of claim 12 , wherein said one-way valve is oriented to block liquid from flowing from said first end toward said second end and to permit liquid to flow from said second end toward said first end.

19. The shunt of claim 12 , wherein said one-way valve is configured to be external to the patient's subarachnoid space.

20. The shunt of claim 12 , further wherein said shunt is sized to pass through a sinus lumen.

Assignees

• Tufts Medical Ct Inc

Inventors

• Heilman Carl
• Malek Adel M

Classifications

• A61M2210/0687

  Skull, cranium · CPC title

• A61M2202/0464

  Cerebrospinal fluid · CPC title

• A61M2025/0076

  Unidirectional valves · CPC title

• A61M27/002

  Implant devices for drainage of body fluids from one part of the body to another (intraocular A61F9/00781; middle ear A61F11/202) · CPC title

• A61M25/0075

  Valve means · CPC title