Thrombectomy catheter with aspiration and guidewire lumens defining an asymmetrical taper and cutting edge with offset tip

Patent metadata

Field	Value
Publication number	US-9554822-B2
Application number	US-201113224653-A
Country	US
Kind code	B2
Filing date	Sep 2, 2011
Priority date	Sep 2, 2011
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

The subject matter relates a catheter having a helical or spiral tip defining an aspiration port for removing obstructions from blood vessels.

First claim

What is claimed is:

1. A catheter for removing an obstruction from a blood vessel comprising:
an elongate tubular body comprising a proximal end and a distal end, wherein an aspiration lumen and a guidewire lumen extend through the elongate tubular body, the aspiration lumen and the guidewire lumen each having a central longitudinal axis, the aspiration lumen and the guidewire lumen aligned such that the central longitudinal axis of the guidewire lumen extends into the aspiration lumen with the central longitudinal axis of the guidewire lumen radially offset from the central longitudinal axis of the aspiration lumen, wherein the distal end of the elongate tubular body includes a leading edge and a trailing edge defining an asymmetrical taper and a cutting edge, the cutting edge configured to manipulate an obstruction from a vessel wall during aspiration; and
a tip radially offset from the central longitudinal axis of the aspiration lumen, the tip including at least a portion of a leading edge of the guidewire lumen, and wherein the leading edge of the guidewire lumen is distal to a leading edge of the aspiration lumen.

2. The catheter according to claim 1 , wherein a portion of the tip is about 5 mm to 20 mm in length.

3. The catheter according to claim 1 , wherein an external diameter of the elongate tubular body is about 3 French to 8 French.

4. The catheter according to claim 1 , wherein the tip includes a wall integral with the distal end of the elongate tubular body, the wall including a helical taper having a clockwise direction.

5. The catheter according to claim 1 , wherein the tip includes a wall integral with the distal end of the elongate tubular body, the wall including a helical taper having a counterclockwise direction.

6. The catheter according to claim 5 , wherein the helical taper defines a sinusoidal or curved configuration.

7. The catheter of claim 1 , wherein the aspiration lumen includes an aspiration port, and wherein the aspiration lumen is defined by at least a portion of a wall of the elongate tubular body.

8. The catheter of claim 7 , wherein the aspiration port is defined by at least a portion of the tip.

9. The catheter of claim 8 , wherein the guidewire lumen extends from the elongate tubular body to through the tip.

10. The catheter of claim 9 , wherein the guidewire lumen is disposed exterior to the elongate tubular body.

11. The catheter of claim 9 , wherein the guidewire lumen extends from an inner wall of the elongate tubular body.

12. The catheter of claim 9 , wherein the guidewire lumen extends less than 40 cm proximally from the distal end of the elongate tubular body.

13. The catheter of claim 12 , wherein a proximal end of the guidewire lumen is closer to the distal end of the elongate tubular body than to the proximal end of the elongate tubular body.

14. The catheter of claim 1 , wherein the tip is formed from a material that has a lower durometer than a material of the elongate tubular body.

15. The catheter of claim 1 , wherein the elongate tubular body includes a side aperture extending through inner and outer walls of the elongate tubular body.

16. The catheter of claim 1 , wherein the elongate tubular body comprises an inner polymeric layer, an outer polymeric layer, and a support layer therebetween.

17. The catheter of claim 16 , wherein a lubricious coating is disposed on a surface of the inner layer.

18. The catheter of claim 16 , wherein the support layer includes braided material.

19. The catheter of claim 1 , wherein the catheter is a rapid exchange catheter.

20. The catheter of claim 1 , wherein the catheter is an over-the-wire catheter.

Assignees

• Consigny Paul
• Abbott Cardiovascular Systems Inc

Inventors

• Consigny Paul

Classifications

• A61B17/320708

  Curettes, e.g. hollow scraping instruments · CPC title

• A61B17/3207 Primary

  Atherectomy devices {working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions (A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016)} · CPC title

• A61M1/84

  Drainage tubes; Aspiration tips (for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32) · CPC title

• A61B2017/22039

  eccentric · CPC title

• A61M25/0071

  Multiple separate lumens (multiple separate lumens throughout the catheter A61M25/0026) · CPC title