IP Library › Patent Application 19370330
Patent Application
App. No. 19/370,330

Cerebrospinal Fluid Shunt

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Quick Facts
Patent No.
US None
App. No.
19/370,330
Abstract

A method including: introducing a shunt into a vascular system, wherein the shunt includes an inlet aperture in an inlet region and an outlet aperture in an outlet region; positioning the inlet region into an epidural or intervertebral vein; with a stylet, puncturing a wall of the epidural or intervertebral vein, traversing an interstitial space, and puncturing a thecal sac, wherein the stylet includes a wire extending through the shunt; moving the shunt to cause the inlet region to extend through a wall of the epidural or intervertebral vein; moving the shunt to cause the inlet region to extend into an interstitial space; and moving the shunt to cause the inlet region to extend through the thecal sac, such that the inlet region is positioned in an intradural space, and such that the outlet region is positioned in a venous pathway.

Claims (37)

1 . (canceled)

2 . A cerebrospinal fluid shunt for placement in a patient, the cerebrospinal fluid shunt comprising:

an inlet region configured to pass through an aperture in an epidural vein wall or an intervertebral vein wall, to pass through an aperture in a thecal sac, and to pass through an interstitial space between one of the epidural vein wall or the intervertebral vein wall and the thecal sac;

an inlet aperture in the inlet region, wherein the inlet aperture is configured to receive cerebrospinal fluid from an intradural space;

an outlet region configured to be positioned in a venous pathway;

an outlet aperture in the outlet region, wherein the outlet aperture is in fluid communication with the inlet aperture, wherein the outlet aperture is configured to permit flow the cerebrospinal fluid received by the inlet aperture out of the cerebrospinal fluid shunt;

a transverse region between the inlet region and the outlet region, wherein the transverse region comprises a channel to enable fluid communication between the inlet aperture and the outlet aperture; and

a regulator configured to partially decrease a flow of the cerebrospinal fluid through the channel.

3 . The cerebrospinal fluid shunt of claim 2 , wherein the regulator is further configured to completely stop the flow of the cerebrospinal fluid through the channel.

4 . The cerebrospinal fluid shunt of claim 2 , wherein the regulator is included in the transverse region.

5 . The cerebrospinal fluid shunt of claim 4 , wherein the regulator comprises at least one collapsible region in a wall of the transverse region.

6 . The cerebrospinal fluid shunt of claim 2 , wherein the regulator is configured to partially decrease the flow of the cerebrospinal fluid through the channel when a pressure of the cerebrospinal fluid in the channel decreases.

7 . The cerebrospinal fluid shunt of claim 2 , wherein the regulator is not positioned within the channel.

8 . The cerebrospinal fluid shunt of claim 2 , further comprising an anchor configured to facilitate stabilization of the cerebrospinal fluid shunt when it is implanted.

9 . The cerebrospinal fluid shunt of claim 2 , wherein the cerebrospinal fluid shunt comprises at least one of a material that reduces coagulation of blood or a material that reduces aggregation of protein.

10 . A system, comprising:

a cerebrospinal fluid shunt for placement in a patient, the cerebrospinal fluid shunt including:

an inlet region configured to pass through an aperture in an epidural vein wall or an intervertebral vein wall, to pass through an aperture in a thecal sac, and to pass through an interstitial space between one of the epidural vein wall or the intervertebral vein wall and the thecal sac;

an inlet aperture in the inlet region, wherein the inlet aperture is configured to receive cerebrospinal fluid from an intradural space;

an outlet region configured to be positioned in a venous pathway;

an outlet aperture in the outlet region, wherein the outlet aperture is in fluid communication with the inlet aperture, wherein the outlet aperture is configured to permit flow the cerebrospinal fluid received by the inlet aperture out of the cerebrospinal fluid shunt; and

a transverse region between the inlet region and the outlet region, wherein the transverse region comprises a channel to enable fluid communication between the inlet aperture and the outlet aperture; and

a hollow tube including a region configured to engage the cerebrospinal fluid shunt, wherein the hollow tube is configured to be moved and to responsively move the cerebrospinal fluid shunt.

11 . The system of claim 10 , further comprising a retractable sheath, wherein the cerebrospinal fluid shunt and the hollow tube are configured to be positioned at least partially within the retractable sheath, wherein the retractable sheath is configured to extend across the thecal sac and into the intradural space during implantation of the cerebrospinal fluid shunt.

12 . The system of claim 11 , further comprising a guide catheter, wherein the retractable sheath, the cerebrospinal fluid shunt, and the hollow tube are configured to be advanced through the guide catheter.

13 . The system of claim 12 , wherein the retractable sheath is configured to be removed via a handle outside of a patient.

14 . The system of claim 10 , wherein the hollow tube is configured to be moved by a handle outside of a patient.

15 . The system of claim 10 , wherein the cerebrospinal fluid shunt further comprises an anchor configured to facilitate stabilization of the cerebrospinal fluid shunt when it is implanted.

16 . A system for puncturing tissue before implanting a cerebrospinal fluid shunt, the system comprising:

a hollow tube configured to be advanced through a vein; and

a stylet configured to be advanced out of the hollow tube to create openings in a vein wall, interstitial space, and a thecal sac.

17 . The system of claim 16 , wherein the hollow tube is configured to be advanced through the openings in the vein wall, the interstitial space, and the thecal sac, and into the intradural space.

18 . The system of claim 17 , wherein the hollow tube is not configured to provide a puncturing function.

19 . The system of claim 17 , wherein the hollow tube is configured to provide a puncturing function.

20 . The system of claim 16 , wherein the stylet comprises nitinol.

21 . The system of claim 16 , further comprising a guide catheter, wherein the hollow tube and the stylet are configured to be advanced through the guide catheter.

22 . The system of claim 16 , wherein the hollow tube is configured to deliver or extract liquid to or from an intradural space.