Medical device and methods for use

• US 20030195537A1
• Filed: 05/22/2003
• Published: 10/16/2003
• Est. Priority Date: 02/10/1998
• Status: Active Grant

• Current Assignee: Vascular Development Corporation LLC
• Original Assignee: Artemis Medical, Inc. (Johnson & Johnson)
• Inventors: Fulton, Richard E., Dubrul, William Richard
• Granted Patent: US 7,491,210 B2
• Time in Patent Office: Days
• US Class Current: 606/159
• 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 2017/2212 having a closed distal end, e.g. a loop

Abstract

Medical devices that have a novel mechanical trap(s) on the distal end of a shaft that is used for the removal of material from the body. Further an expandable channel is included to entrap the material that aid with removal or obliteration of tissue or foreign bodies is disclosed.

Claims

1. A device for removal of material from the body, comprising:

an elongate shaft for insertion into a body, said shaft having a distal end,

an expandable channel mechanism on the distal end of said shaft, said expandable channel mechanism having a radially compressed state for insertion into the body and a radially expanded state extending near to the diameter of the material to be removed near the distal end of said shaft where the expandable channel mechanism entraps said material to be removed.

2. The removal device of claim 1, further comprising:

a support wire that fits through said shaft, said wire having a distal end,

a material trap element supported on said distal end of said wire, said trap element having a radially compressed state for insertion of said wire into the body and through or around whatever material is to be engaged and a radially expanded state to engage the material,

expansion of said trapping element when positioned distally of the material and subsequent proximal movement of said trapping element forcing the material into said expandable shaft.

3. The removal device of claim 1, further comprising:

a support wire that fits through said shaft said wire having a distal end,

a material trap element supported on said distal end of said wire, said trap element having a radially compressed state for insertion of said wire into the body and through or around whatever material is to be engaged and a radially expanded state to engage the material,

expansion of said trapping element when positioned distally of the material to be removed and subsequent distal movement of said expandable shaft element forcing the material into said expandable shaft.

4. The removal device of claim 3, wherein:

said expandable channel mechanism is an annular braided segment, and

said engaging element is a multi-wing malecot style mechanism.

5. The removal device of claim 4, wherein:

said multi-wing malecot has a roughened surface.

6. The removal device of claim 4, wherein:

said multi-wing malecot has a membrane between wings to increase surface area.

7. The removal device of claim 3, wherein:

said expandable channel mechanism is an annular braided segment, and

said trapping element is an annular braided segment.

8. The removal device of claim 3, wherein:

said expandable channel mechanism is an annular braided segment, and

said trapping element is an inflatable balloon segment.

9. The removal device of claim 8 wherein:

said balloon has a roughened surface.

10. The removal device of claim 3 wherein said trapping element in said expanded state contacts the wall of a passageway in which it is inserted.

11. The removal device of claim 2 wherein said trapping element in said expanded state contacts the wall of a passageway in which it is inserted.

12. The removal device of claim 2, wherein:

said expandable channel mechanism is an annular braided segment, and

said engaging element is an annular braided segment.

13. The removal device of claim 2, wherein:

said expandable channel mechanism is an annular braided segment, and

said engaging element is an inflatable balloon segment.

14. The removal device of claim 13 wherein:

said balloon has a roughened surface.

15. The removal device of claim 2, wherein:

said expandable channel mechanism is an annular braided segment, and

said engaging element is a multi-wing malecot style mechanism.

16. The removal device of claim 12 wherein said trapping engaging element is a braided element having individual yarns sufficiently flexible to be moved between said states and sufficiently stiff to substantially hold said expanded state when removing the targeted material.

17. The removal device of claim 7 wherein said trapping element is a braided element having individual yarns sufficiently flexible to be moved between said states and sufficiently stiff to substantially hold said expanded state when removing the targeted material.

18. A device for removing material from the body, comprising

a support wire having a distal end,

an trapping element having a retracted insertion state and an expanded material removal state, said support wire including user operable means for moving said trapping element from said retracted state to said expanded state,

expansion of said trapping element when positioned distally of material to be removed.

19. The removal device of claim 18, wherein said trapping element is a multi-wing malecot style trapping element.

20. A catheter for use in receiving material from the body into which the catheter is placed, the improvement comprising:

a expandable channel mechanism on the distal end of said catheter,

said trapping mechanism having a radially retracted insertion state and a radially expanded trapping state,

an actuator associated with said trapping element to move said trap from said retracted state to said expanded trapping state,

expansion of said expandable channel mechanism when said catheter is inserted into a body passageway assuring that material being removed in a proximal direction from a position in said passageway that is distal of said catheter will enter the lumen of said expandable catheter and will be blocked from the body passageway external of said catheter or to act as a seal for aspiration.

21. A method of removing material from the body, comprising the steps of:

inserting a support wire into the body, said wire having a distal end and having an material trapping engaging element supported on said distal end of said wire, said trapping element having a radially compressed state for insertion of said wire into the body,

said trapping element in the radially compressed state to pass through or around whatever material is to be engaged,

radially expanding said trapping elements to a radially expanded state when said engaging element is positioned distally of said material to be removed and

inserting a shaft into the body over said support wire wherein,

said shaft is an expandable channel that accepts material to be removed.

22. The method of claim 21, further comprising the step of proximally moving said trapping element to force the material into said expandable channel.

23. The method of claim 21, wherein said expandable channel and trapping elements are made of tubular braid and said elements are braided elements having individual yarns sufficiently flexible to be moved between said states and sufficiently stiff to substantially hold said expanded state when removing the targeted material.

24. The method of claim 21, wherein said trapping element is an inflatable balloon.

25. The method of claim 21, wherein said trapping element is a multi-winged malecot.

26. A method of removing material from the body, comprising the steps of:

inserting a shaft into the body toward targeted material to be removed wherein,

said shaft is an expandable channel that accepts material to be removed.

27. A method of claim 26, wherein said expandable channel mechanism is expanded with the help of a substructure mechanism.

28. A method of claim 26, wherein said expandable channel mechanism is expanded with the help of a superstructure mechanism.

29. A method of claim 26, wherein removal of material by said expandable channel mechanism is aided by using extraneous energy sources other than the pushing forward of the expandable channel mechanism.

30. A method of claim 29, wherein the extraneous energy sources include one of the following sources:

lytic therapy, thermal energy, electrical energy, motor driven rotation, laser energy, sonic energy, mechanical morcellation and radio frequency energy.