Minimally-advancing luminal catheter

Patent metadata

Field	Value
Publication number	US-9402982-B2
Application number	US-201214241488-A
Country	US
Kind code	B2
Filing date	Sep 5, 2012
Priority date	Sep 5, 2011
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

The present invention relates to an implantable catheter ( 100 ) provided for insertion through a wall ( 50 ) of a dural venous sinus ( 70 ) in a subject, having a proximal ( 20 ) and distal end ( 30 ), comprising: —a tubular shaft ( 10 ) for insertion through the wall ( 50 ) of the venous sinus ( 70 ) into the sinus ( 52 ), provided with a shaft lumen ( 12 ) in fluid connection with a proximal port ( 14 ) at the proximal end and a distal port ( 16 ) at the distal end of the shaft ( 10 ), and —a stop element ( 40 ) disposed on an outer surface of the tubular shaft ( 10 ), configured to limit the depth of insertion of the tubular shaft ( 10 ) into the sinus.

First claim

The invention claimed is:

1. An implantable catheter provided for insertion through a wall of a dural venous sinus in a subject, having a proximal and distal end, comprising:
a tubular shaft for insertion through the wall of the venous sinus into the sinus, provided with a shaft lumen in fluid connection with a proximal port at the proximal end and a distal port at the distal end of the shaft;
a stop element disposed on an outer surface of the tubular shaft, configured to limit the depth of insertion of the tubular shaft into the sinus; and
wherein the drop length of tubular shaft distal to the stop element, that is the linear distance from an imaginary plane that contacts maximally the engaging surface of the stop element to the distal end of the tubular shaft, measured along an axis perpendicular to said imaginary plane, is equal to or less than 9 mm.

2. Catheter according to claim 1 , wherein the depth of insertion of the tubular shaft is limited to less than the span of said sinus in transverse cross-section.

3. Catheter according to claim 2 , wherein the depth of insertion of the tubular shaft is limited to essentially half of the span of said sinus.

4. Catheter according to claim 1 , wherein the stop element incorporates a fixation element, configured to fix the position of the tubular shaft relative to the point of insertion into the wall of said sinus.

5. Catheter according to claim 1 , wherein the stop element and/or fixation element is configured for epidural placement.

6. Catheter according to claim 4 , wherein the fixation element comprises one or more wings.

7. Catheter according to claim 6 , wherein the wings are expandable wings and comprise springs that maintain open wings in an uncompressed state.

8. Catheter according to claim 6 , wherein said wings are configured to expand in the space between the cranium and the dura mater.

9. Catheter according to claim 1 , wherein the insertion depth of the tubular shaft is limited to avoid contact of the tubular shaft with the inner wall of said sinus.

10. Catheter according to claim 1 , wherein the distal port is provided as a side port on the tubular shaft.

11. Catheter according to claim 1 , wherein the distal port is provided at the terminal end of the tubular shaft.

12. Catheter according to claim 11 , wherein the distal port is provided at the distal terminal end of the tubular shaft that contains at least one bend distal to the stop element.

13. Catheter according to claim 10 , wherein an imaginary line drawn through the central axis of the distal port touches the inner surface of the tubular shaft distal of the stop element.

14. Catheter according to claim 1 , configured such that the distal port is oriented to face the direction of blood flow in the sinus.

15. Catheter according to claim 1 , incorporated into the sinus end of a ventriculosinus CSF shunt.

16. Catheter according to claim 1 , wherein the sinus, is the superior sagittal sinus, transverse sinuses, or sigmoid sinus.

17. Catheter according to claim 1 , wherein the total length of tubular shaft distal to the stop element is equal to or less than 15 mm.

18. Catheter according to claim 1 , wherein the drop width of tubular shaft distal to the stop element, that is the length of the opposite side of right angled triangle, having hypotenuse (h), opposite (o) and adjacent (ad) sides, where the opposite side is opposite angle, a, where the hypotenuse (h) is the linear distance between the distal end of the tubular shaft and the point of contact with the stop element, and angle a is the corner of the triangle at said point of contact, is equal to or less than 6 mm.

19. A method for treatment of dysfunctional evacuation of cerebrospinal fluid in a subject, the method comprising inserting a catheter according to claim 1 through a wall of a dural venous sinus of the subject wherein insertion depth of the tubular shaft is limited to avoid contact of the tubular shaft with said sinus inner wall.

Assignees

• Baert Edward
• Dewaele Frank
• Steerable Instr Bvba
• Univ Gent

Inventors

• Baert Edward
• Dewaele Frank

Classifications

• A61M27/006 Primary

  Cerebrospinal drainage; Accessories therefor, e.g. valves · CPC title

• A61M25/04

  in the body, e.g. expansible {(A61M25/10, A61M16/0488 take precedence)} · CPC title