Recanalization device

Patent metadata

Field	Value
Publication number	US-10105159-B2
Application number	US-201414198962-A
Country	US
Kind code	B2
Filing date	Mar 6, 2014
Priority date	Mar 15, 2013
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

Catheters for the removal of occlusions in a patient's vasculature. Exemplary catheters use a flexible distal end tube which is capable of coiling irregularly within the occlusion and securing it for removal.

First claim

We claim:

1. A catheter comprising:
a tip;
a monolithic distal end tube is polymeric and flexible and which comprises a substantially linear state and an irregularly coiled state, the monolithic distal end tube having an inner lumen extending within the monolithic distal end tube, the monolithic distal end tube including an outer surface and an inner surface defining the inner lumen of the monolithic distal end tube, the inner surface being eccentric to the outer surface at a plurality of locations along the longitudinal length of the monolithic distal end tube such that an arrangement of the inner surface and the outer surface of the monolithic distal end tube varies along the monolithic distal end tube and a cross-section of the monolithic distal end tube taken at a first of the plurality of locations comprises an arrangement of the inner surface and the outer surface that is different from a cross-section taken at a second of the plurality of locations; and
an inner mandrel removably received in the inner lumen of the monolithic distal end tube, the inner mandrel providing column strength to the monolithic distal end tube to support the monolithic distal end tube in a substantially linear configuration.

2. The catheter of claim 1 , further comprising:
a line;
wherein the monolithic distal end tube is transitionable between the substantially linear state and the irregularly coiled state, wherein an application of tension to the line causes the monolithic distal end tube to adopt the irregularly coiled state, and wherein a release of tension to the line causes the monolithic distal end tube to adopt the substantially linear state.

3. The catheter of claim 2 , wherein the monolithic distal end tube comprises a plurality of segments of different flexibility.

4. The catheter of claim 2 , wherein the line is attached to at least a portion of the monolithic distal end tube.

5. The catheter of claim 4 , wherein the line is a wire.

6. The catheter of claim 4 , wherein the line is a filament.

7. The catheter of claim 1 , wherein the monolithic distal end tube comprises a corrugated polymer.

8. The catheter of claim 7 , wherein the monolithic distal end tube is corrugated in an irregular manner.

9. The catheter of claim 8 , wherein the corrugation is asymmetrical across a diametric axis of the monolithic distal end tube.

10. The catheter of claim 7 , wherein less than 100% of the outer surface of the monolithic distal end tube is corrugated.

11. The catheter of claim 7 , wherein the monolithic distal end tube comprises one from the group of ePTFE, nylon, polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polyurethane, and polysiloxane.

12. The catheter of claim 11 , wherein the polymer is semi-porous.

13. The catheter of claim 1 , wherein the position of the inner surface in relation to the outer surface varies axially along the length of the monolithic distal end tube.

14. The catheter of claim 1 , wherein a portion of the monolithic distal end tube is outside of the inner mandrel.

15. The catheter of claim 1 , further comprising a radiopaque material.

16. The catheter of claim 1 , wherein the tip comprises a radiopaque material.

17. The catheter of claim 1 , wherein the tip comprises a densified end segment of the monolithic distal end tube.

18. The catheter of claim 1 , further comprising an actuating mechanism configured to apply vacuum to the monolithic distal end tube.

19. The catheter of claim 1 , wherein the tip is a thrombus piercing tip; and wherein the monolithic distal end tube is formed entirely of semi-porous ePTFE including a plurality of semi-densified wrinkles defining a series of irregular corrugations in the semi-porous ePTFE of the monolithic distal end tube.

Assignees

• Gore & Ass
• W L Gore Ass Inc

Inventors

• Bates Mark C
• Cully Edward H
• Williams David M

Classifications

• A61B17/221

  Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)} · CPC title

• A61B2017/306

  holding by means of suction · CPC title

• A61B17/32075 Primary

  Pullback cutting; combined forward and pullback cutting, e.g. with cutters at both sides of the plaque · CPC title

• A61B2017/2217

  single wire changing shape to a gripping configuration · CPC title

• A61B2017/22094

  for crossing total occlusions, i.e. piercing · CPC title