DEVICE AND METHOD FOR REMOVING MATERIAL FROM A HOLLOW ANATOMICAL STRUCTURE

• US 20120059356A1
• Filed: 10/14/2011
• Published: 03/08/2012
• Est. Priority Date: 09/07/2010
• Status: Active Grant

• Current Assignee: AngioDynamics, Inc.
• Original Assignee: AngioDynamics, Inc.
• Inventors: di Palma, Giorgio, Cartier, William A., Appling, William, Hamilton, William C. Jr.
• Granted Patent: US 8,858,497 B2
• Time in Patent Office: Days
• US Class Current: 604/509
• CPC Class Codes: A61B 17/12031 complete occlusion
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12136 Balloons
• CPC Class Codes: A61B 17/12186 liquid materials adapted to be injected
• 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 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/22082 after introduction of a substance
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61M 25/0069 Tip not integral with tube
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0071 Multiple separate lumens multiple separate lumens throughout the catheter A61M25/0026

Abstract

A medical device for removing a material from a hollow anatomical structure is provided. The device includes a radially expandable capture member. The device includes a treatment segment that is positioned distally of the capture member in use and having at least one exit port adapted for delivering a fluid agent to the material. The device includes an embolic capture device that is positioned distally of the treatment segment in use and including a radially expandable filter for capturing a part of the material which travels downstream of the treatment segment. Additionally, a method is provided herein for infusing, injecting, distributing, or releasing an intended fluid into a hollow anatomical structure.

Claims

1. A medical device for removing material from a hollow anatomical structure, comprising:

a radially expandable capture member;

a treatment segment positioned distally of the capture member in use and having at least one exit port adapted for delivering a fluid agent to the material;

an embolic capture device positioned distally of the treatment segment in use and including a radially expandable filter for capturing a part of the material which travels downstream of the treatment segment.

2. A medical device of claim 1, wherein the material is a thrombus.

3. A medical device of claim 1, wherein the treatment segment includes at least one radially expandable arm.

4. A medical device of claim 1, wherein the treatment segment is adapted to be used over a guidewire.

5. A medical device of claim 3, wherein the at least one radially expandable arm is adapted to rotate to mechanically disrupt the material.

6. A medical device of claim 1, wherein the treatment segment includes a plurality of expandable arms.

7. A medical device of claim 6, wherein each expandable arm includes the at least one exit port.

8. A medical device of claim 6, further comprising a tension wire for controlling the amount of radial expansion of the plurality of expandable arms.

9. A medical device of claim 1, wherein the radially expandable capture member includes a plurality of wire members containing a memory-shape material.

10. A medical device of claim 1, wherein the radially expandable capture member is independently movable in a longitudinal direction in relation to the treatment segment.

11. A medical device of claim 1, wherein the radially expandable capture member is independently movable in a rotational direction in relation to the treatment segment.

12. A medical device of claim 1, wherein the treatment segment includes an elongate shaft and the at least one exit port is located on the elongate shaft.

13. A medical device of claim 1, further comprising a vacuum source connected to the radially expandable capture member for capturing the material for removal.

14. A medical device of claim 1, wherein the at least one exit port includes at least two pressure responsive slits that are designed to open at the same injection pressure.

15. A medical device of claim 14, wherein the injection pressure required to open the pressure responsive slits is about 5 PSI.

16. A medical device of claim 1, wherein the radially expandable filter includes a plurality of intermeshed wires.

17. A method for removing material from a hollow anatomical structure, comprising:

inserting a removal device including a radially expandable capture member, a treatment segment having at least one exit port and an embolic capture device having a radially expandable filter;

positioning the treatment segment near the material such that the expanded filter is positioned distally of the treatment segment and the expanded capture member is positioned proximally of the treatment segment, the expanded filter capable of capturing a part of the material which travels downstream of the treatment segment;

injecting a fluid agent to the material through the exit port;

receiving the treatment segment in the expanded capture member; and

receiving the embolic capture device in the expanded capture member.

18. A method of claim 17, wherein the treatment segment includes at least one radially expandable arm, and further comprising:

rotating the treatment segment to mechanically disrupt the material prior to removal.

19. A method of claim 17, wherein the step of injecting includes:

delivering a lytic agent through the exit port to chemically disrupt the material prior to removal.

20. A method of claim 17, further comprising:

applying suction to draw the material into the radially expandable capture member prior to removal of the material.