DEVICE FOR OPENING OCCLUDED BLOOD VESSELS

• US 20110224707A1
• Filed: 08/19/2009
• Published: 09/15/2011
• Est. Priority Date: 08/19/2008
• Status: Active Grant

• Current Assignee: Phenox Gmbh
• Original Assignee: Phenox Gmbh
• Inventors: Miloslavski, Elina, Hannes, Ralf, Monstadt, Hermann
• Granted Patent: US 8,945,161 B2
• Time in Patent Office: Days
• US Class Current: 606/159
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/22042 Details of the tip of the guide wire
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

The invention relates to a device for opening occluded blood vessels, comprising a braided structure (2) on a guide wire (1), said braided structure (2) being securely and permanently attached to the guide wire and consisting of a plurality of filaments (4) arranged in a helical manner and at least at the proximal end combined into a bundle, with the braided structure (2) assuming an elongated form of smaller diameter when subjected to external force while when in unstressed state defining a tubular element of larger diameter closed at least at its proximal end, with the device being provided with restraining/bracing fiber elements (9).

Claims

1. Device for opening occluded blood vessels, comprising a braided structure (2) on a guide wire (1), said braided structure (2) being securely and permanently attached to the guide wire and consisting of a plurality of filaments (4) arranged in a helical manner and at least at the proximal end combined into a bundle, with the braided structure (2) assuming an elongated form of smaller diameter when subjected to external force while when in unstressed state defining a tubular element of larger diameter closed at least at its proximal end, characterized in that the device is provided with restraining/bracing fiber elements (9).

2. Device according to claim 1 comprising 6 to 16 filaments (4).

3. Device according to claim 1, characterized in that the filaments (4) consist of a shape-memory alloy, in particular of nitinol.

4. Device according to claim 1, characterized in that the filaments (4) at least at the proximal end converge centrically or eccentrically.

5. Device according to claim 4, characterized in that the filaments terminate in sleeves (3) which are also designed to serve as radiopaque markers.

6. Device according to claim 1, characterized in that the braiding structure (2) is of densified configuration distally, preferably through incorporated fibers (2).

7. Device according to claim 1, characterized in that the restraining fibers are arranged only in the distal area of the braided structure.

8. Device according to claim 1, characterized in that the fibers (9) within the braided structure (2) extend between the points of intersection (10) of filaments (4).

9. Device according to claim 1, characterized in that the fibers (9) within the braided structure (2) form a spatial structure.

10. Device according to claim 1, characterized in that the fibers (9) extend in zig-zag fashion between oppositely arranged points of intersection (10) of filaments (4) longitudinally through the braiding structure (2).

11. Device according to claim 1, characterized in that the fibers (9) extend between non-neighboring points of intersection (10) and filaments (4) in a plane perpendicular to the longitudinal direction of the braided structure (2).

12. Device according to claim 1, characterized in that the braided structure (2) is adjusted to a force exerted towards a vessel wall of maximum 0.3 N over an effective length of 20 mm.

13. Device according to claim 1, characterized in that the braided structure (2) has filaments (4) connected with each other at points of intersection (10).

14. Device according to claim 13, characterized in that it has been provided in the proximal and/or central area with filaments (4) connected with each other at points of intersection (10).

15. Device according to claim 13, characterized in that the filaments (4) at points of intersection (10) are welded with or bonded to each other or knotted together by means of additional fiber or wire material.