ANEURYSM COIL DELIVERY SYSTEM

Abstract

Devices and methods for treating an aneurysm include a single unit having an access element and an occlusion element, the access element providing access to the aneurysm for introducing treatment objects such as coils therethrough while the occlusion element blocks the treatment objects from protruding into the vessel. The access element is an elongated element having an access lumen for direct introduction of coils or for introduction of coils via a microcatheter. The occlusion element is a balloon or an elongated element for introduction of blocking objects such as coils therethrough. In embodiments of the present invention, a distal end of the access element is preshaped at an angle to a longitudinal axis of the device, wherein upon introduction of the device into the vessel, the access element is aligned with the longitudinal axis and at placement of the device adjacent the aneurysm, the access element assumes its pre-shaped configuration.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above and further advantages of the present invention may be better understood by referring to the following description in conjunction with the accompanying drawings in which:

FIGS. 1A and 1B are schematic illustrations of a device in accordance with embodiments of the present invention, shown in a deployed state and a pre-deployed state, respectively;

FIGS. 1C, 1D and 1E are cross-sectional illustrations of the device of FIGS. 1A and 1B, showing an access lumen, an inflation lumen and a core wire, in accordance with several configurations;

FIGS. 1F and 1G are illustrations of a distal portion of the device of FIGS. 1A and 1B in accordance with additional embodiments of the present invention;

FIGS. 2A and 2B are schematic illustrations of a device in accordance with further embodiments of the present invention, shown in a deployed state and a pre-deployed state, respectively;

FIG. 2C is a cross-section illustration of the device of FIGS. 2A and 2B, showing an access lumen, an inflation lumen coaxial to the access lumen, and a core wire;

FIGS. 3A and 3B are schematic illustrations of a device in accordance with further embodiments of the present invention, shown in a deployed state and a pre-deployed state, respectively;

FIG. 3C is a cross-section illustration of the device of FIGS. 3A and 3B, showing an access lumen, a shaft and a core wire;

FIGS. 4A and 4B are schematic illustrations of a device in accordance with further embodiments of the present invention, shown in a pre-deployed state and in a deployed state, respectively;

FIGS. 5A-5D are schematic illustrations of a device in accordance with yet further embodiments of the present invention, shown in deployed states in FIGS. 5A and 5C and in pre-deployed states in FIGS. 5B and 5D;

FIGS. 6A-6D are schematic illustrations of the steps of a method of using the devices of FIGS. 1A-1G or FIGS. 2A-2C, in accordance with embodiments of the present invention;

FIGS. 7A-7D are schematic illustrations of the steps of a method of using the devices of FIGS. 3A-3C, in accordance with embodiments of the present invention;

FIGS. 8A-8D are schematic illustrations of the steps of a method of using the devices of FIGS. 5A-5D, in accordance with embodiments of the present invention;

FIGS. 9A-9C are schematic illustrations of the steps of a method of using the devices of the present application to treat an aneurysm at a Y-bifurcation;

FIGS. 10A-10C are schematic illustrations of the steps of a method of using the device of FIGS. 4A and 4B to treat an aneurysm at a Y-bifurcation; and

FIGS. 11A-11C are schematic illustrations of views of marker positions in accordance with several different positions of the devices of the present invention.

Claims

1. A device for providing a coil to an aneurysm, the device comprising: an access element having an access lumen and a distal end which is pre-shaped at an angle to a longitudinal axis of the device and which may be forcibly aligned with said longitudinal axis; andan occlusion element for occluding an ostium of the aneurysm during delivery of the coil, said occlusion element at least partially attached to said distal end of said access element.

2. The device of claim 1, wherein said distal end of said access element is comprised of a soft material.

3. The device of claim 1, wherein said distal end of said access element includes a spring-element that provides pre-shaping.

4. The device of claim 1, further comprising a radiopaque marker on said distal end of said access element.

5. The device of claim 1, wherein said occlusion element is an elongated element positioned alongside said access element.

6. The device of claim 1, wherein said occlusion element includes a balloon at a distal end thereof, said balloon having a proximal end and a distal end.

7. The device of claim 6, wherein said distal end of said access element extends past a proximal end of said balloon.

8. The device of claim 1, further comprising a distal connecting element positioned at a distal end of the device, said distal connecting element aligned along the longitudinal axis of the device such that a guidewire placed through said access lumen may further be placed through said distal connecting element.

9. The device of claim 8, wherein said distal connecting element is attached to said occlusion element.

10. The device of claim 8, wherein said distal connecting element is attached to the device distal to said occlusion element.

11. The device of claim 1, further comprising a core wire positioned through the device along the longitudinal axis, said core wire providing added stiffness to the device.

12. The device of claim 1, wherein said occlusion element is an elongated element positioned coaxial to said access element.

13. The device of claim 12, wherein said distal end of said access element protrudes through a portion of said occlusion element.

14. The device of claim 1, wherein said occlusion element comprises a balloon having a balloon proximal end and a balloon distal end, said balloon positioned at a distal end of the device.

15. The device of claim 14, wherein said access element and said balloon are in fluid communication with a single lumen, wherein said fluid communication may be selectively blocked to said access element upon introduction of an object through said access lumen.

16. The device of claim 1, wherein said occlusion element is a balloon having a distal portion and a proximal portion, said distal portion having a different compliance than said proximal portion.

17. The device of claim 1, further comprising a fixed wire at a distal end of the device.

18. The device of claim 1, wherein said access element is an elongated element extending from a proximal end of the device to a distal end of the device, and wherein said occlusion element is an elongated element extending from a proximal end of the device to a distal end of the device, said occlusion element comprising an occlusion lumen for introduction of occluding material therethrough.

19. The device of claim 18, wherein said occlusion element is positioned alongside said access element.

20. The device of claim 18, wherein both said access element and said occlusion element are pre-shaped.

21. The device of claim 18, wherein said occlusion element and said access element may be aligned via placement of a wire through said occlusion lumen or through said access lumen.

22. A method for treating an aneurysm, the method comprising: providing a device having an access element and an occlusion element, said access element having a distal end which includes a pre-shaped configuration which is at an angle to a longitudinal axis of said device;providing a guidewire through said access element and a distal connecting element positioned at a distal end of said occlusion element so as to straighten said pre-shaped distal end;introducing said device into a vessel adjacent to the aneurysm;releasing said guidewire from said distal connecting element so as to cause said access element to assume its pre-shaped configuration;occluding an ostium of the aneurysm using said occlusion element; anddelivering a coil through said access element and into the aneurysm.

23. The method of claim 22, wherein said occlusion element is a balloon and wherein said occluding comprises inflating said balloon.

24. The method of claim 22, wherein said introducing comprises aligning markers on said access element with the aneurysm.

25. The method of claim 22, wherein said access element and said occlusion element are in fluid communication with a single lumen, the method further comprising prior to said occluding introducing an object through said access lumen so as to block said access lumen from said single lumen.

26. The method of claim 22, wherein said occlusion element is an elongated element having an occlusion lumen and wherein said occluding comprises introducing a coil through said occlusion lumen.

27. The method of claim 22, wherein said aneurysm is positioned opposite a Y-bifurcation, and wherein said occlusion element is a balloon having a balloon distal portion and a balloon proximal portion, and wherein said balloon distal portion has a different compliance than said balloon proximal portion, and wherein said occluding comprises inflating said balloon such that said balloon proximal portion is inflated over a wide area causing an area surrounding the Y-bifurcation to be substantially blocked.