Tissue removal device and method

• US 6,699,260 B2
• Filed: 03/28/2001
• Issued: 03/02/2004
• Est. Priority Date: 11/12/1997
• Status: Expired due to Fees

• Current Assignee: Genesis Technologies LLC
• Original Assignee: Genesis Technologies LLC
• Inventors: Fulton, Richard Eustis III, Dubrul, William
• Primary Examiner(s): Jackson, Gary
• Application Number:
  US09/819,350
• Publication Number:
  US 20010011182A1
• Time in Patent Office: 1,070 Days
• Field of Search: 606/200, 604/907
• US Class Current: 606/200
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• 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 2017/00986 Malecots, e.g. slotted tubes, of which the distal end is pulled to deflect side struts
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

A device for the removal of a blockage in a passageway such as a dialysis graft or in a body passageway includes a catheter for reception and aspiration of the blockage and an occlusion engaging element distal of the distal end of the catheter which occlusion engaging element is supported on a wire that extends through the catheter. At the distal end of the catheter, there is a device such as a multi-wing malecot expansion device that is expanded after the catheter is placed in position so as to block the occlusion from passing around the outside of the catheter. The support wire can be a movable core guide wire which has a braided device on its distal end. When the core is as distal as possible of the distal end of the shell, the braid is in a collapsed minimum diameter state for insertion through the catheter and through the occlusion. Proximal movement of the core causes the braid to expand to the wall of the graft. Subsequent proximal movement of the entire support wire causes the braid to contact the occlusion forcing the occlusion into the catheter for aspiration and removal.

Claims

1. A medical instrument for use in a body comprising:

an elongate tubular member having a lumen and a distal end,

a multi-wing blood flow blocking element positioned near said distal end of said elongate member,

an annular membrane around said wings of said multi-wing blood flow blocking element,

said multi-wing blood flow blocking element having a radially compressed state and a radially expanded blocking state,

an actuator associated with said elongate member to move said blood flow blocking element from said compressed state and to said blocking state,

said multi-wing blood flow blocking element in said radially expanded blocking state having a generally funnel shape surface extending from said distal end of said elongate tubular member.

2. The medical instrument of claim 1 wherein said multi-wing blood flow blocking element is a malecot style device.

3. The medical instrument of claim 1 wherein said membrane is an elastomeric, impermeable membrane.

4. The medical instrument of claim 2 wherein said membrane is an elastomeric, impermeable membrane.

5. The medical instrument of claim 1 wherein said actuator extends, through said lumen, distal of said blood flow blocking element and when moved in a proximal direction, engages said blood flow blocking element to switch said blood flow blocking element from said retracted compressed state into said radially expanded state.

6. An occluder for use in a body passageway comprising:

a catheter having a distal end,

a multi-wing blood flow blocking element positioned near the distal end of the catheter, and

an annular membrane around said wings of said blood flow blocking element,

said multi-wing blood flow blocking element having a radially compressed insertion state and a radially expanded blocking state,

an actuator associated with said catheter to move said blood flow blocking element from said compressed state to said expanded state.

7. The occluder of claim 6 wherein said multi-wing blood flow blocking element is a malecot style device.

8. The occluder of claim 6 wherein said membrane is an elastomeric, impermeable membrane.

9. The occluder of claim 7 wherein said membrane is an elastomeric, impermeable membrane.

10. The occluder of claim 6 wherein said blood flow blocking element in said radially expanded blocking state has a generally funnel surface extending out from said distal end of said catheter.

11. The occluder of claim 10 wherein said multi-wing blood flow blocking element is a malecot style device.

12. The occluder of claim 11 wherein said membrane is an elastomeric, impermeable membrane.

13. The occluder of claim 6 wherein said actuator extends, through said lumen, distal of said blood flow blocking element and when moved in a proximal direction, engages said blood flow blocking element to switch said blood flow blocking element from said retracted insertion state into said radially expanded blocking state.

14. The occluder of claim 13 wherein said dilator extends, through said lumen, distal of said blood flow blocking element and when moved in a proximal direction, engages said blood flow blocking element to switch said blood flow blocking element from said retracted insertion state into said radially expanded blocking state.

15. The method of deploying an occluder in a body passageway comprising the steps of:

inserting a catheter into a body passageway, said catheter having a malecot-style blood flow blocking device covered with an annular elastomeric, impermeable membrane,

providing said blood flow blocking element in a radially compressed state during said step of inserting, and

radially expanding said blood flow blocking element into a radially expanded state extending to or near to the wall of the body passageway after said step of inserting, and

using said expanded state of said blood flow blocking element for blocking passage of material around the outside of said catheter.

16. The method of claim 15 wherein said steps of radially expanding includes providing said expanded state with a generally funnel surface extending out from said distal end of said catheter.