Endovascular cerebrospinal fluid shunt
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 helical tip disposed at the second end, and a hollow passageway extending between the helical tip and one-way valve. The helical tip is constructed to penetrate a patient's sinus wall. Cerebrospinal fluid drains through the helical tip and out through the valve.
1. A method for draining cerebrospinal fluid from a patient's subarachnoid space, the method comprising the steps of:
providing an 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 (CSF) to be drained through the tip and out through the valve;
endovascularly delivering the shunt to the sinus wall;
penetrating the sinus wall and implanting the second end of the shunt in a CSF space of the patient; and
draining cerebrospinal fluid from the patient.
2. The method of claim 1 , further comprising providing a plurality of apertures to the tip, the plurality of apertures configured to allow cerebrospinal fluid to enter the tip.
3. The method of claim 1 , further comprising providing an antithrombic coating on the shunt.
4. The method of claim 1 , wherein endovascularly delivering the shunt to the sinus wall includes delivering percutaneously and implanting the shunt into the sinus wall via a delivery catheter.
5. The method of claim 4 , wherein endovascularly delivering the shunt to the sinus wall includes delivering percutaneously and implanting the shunt into the sinus wall via a jugular vein.
6. The method of claim 4 , wherein endovascularly delivering the shunt to the sinus wall includes delivering percutaneously and implanting the shunt into the sinus wall via a femoral vein.
7. The method of claim 4 , wherein endovascularly delivering the shunt to the sinus wall includes delivering the shunt via a sigmoid sinus lumen.
8. The method of claim 4 , further comprising
positioning the shunt at an end of an internal catheter; and
manipulating the internal catheter through the delivery catheter to deliver the shunt to the sinus wall.
9. The method of claim 8 , further comprising providing a hollow lumen to the internal catheter.
10. The method of claim 8 , further comprising confirming flow of cerebrospinal fluid through the shunt including, after manipulating the internal catheter through the delivery catheter to deliver the shunt to the sinus wall, aspirating the cerebrospinal fluid through the hollow lumen of the internal catheter via the shunt.
11. The method of claim 1 , further comprising providing a closed sharpened end to the tip.
12. The method of claim 1 , further comprising providing the tip with a formed helix.
13. The method of claim 12 , wherein the formed helix has a constant radius.
14. The method of claim 1 further comprising providing a taper to the first end of the shunt.
15. The method of claim 1 , further comprising providing a projection between said first and second end of the shunt, wherein said projection extends along a plane perpendicular to a line extending between said first and second ends of said shunt.
16. The method of claim 1 , wherein configuring the one-way valve to block liquid from flowing from said first end toward said second end and to permit liquid from flowing from said second end toward said first end.