Medical device removal system

• US 20060247572A1
• Filed: 04/28/2005
• Published: 11/02/2006
• Est. Priority Date: 04/28/2005
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: McCartney, Charles M.
• Granted Patent: US 8,025,668 B2
• Time in Patent Office: Days
• US Class Current: 604/19
• 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 2017/00022 Sensing or detecting at the treatment site
• CPC Class Codes: A61B 2017/00115 with audible or visual output with imaging means A61B90/37, A61B34/20
• CPC Class Codes: A61B 2017/22035 for retrieving or repositioning foreign objects
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: A61B 5/06 Devices, other than using radiation, for detecting or locating foreign bodies for removing same A61B17/50 ; determining position of probes within or on the body of the patient
• CPC Class Codes: A61B 8/0841 for locating instruments
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal

Abstract

A medical device removal system includes a vessel filter repositioning or removal device to remove and/or reposition a medical device, such as a vessel filter. The system includes a gripper to grip a medical device that is located within a body vessel, and a detector, linked to the gripper, to detect the proximity of the medical device to the gripper. The system may also include an output to indicate a signal from the detector.

Claims

1. A vessel filter repositioning or removal device comprising:

a gripper to secure to a vessel filter within a body vessel; and

a detector linked to the gripper, the detector to detect the proximity of a vessel filter to the gripper.

2. The device according to claim 1, further comprising an output to indicate a signal from the detector.

3. The device according to claim 2, wherein the output comprises an LED.

4. The device according to claim 2, wherein the output comprises a buzzer.

5. The device according to claim 1, further comprising a battery to power the detector.

6. The device according to claim 1, wherein the detector comprises an electrical detector.

7. The device according to claim 6, wherein the electrical detector comprises a positive electrode and a negative electrode, wherein the positive electrode and the negative electrode are configured so that contact with a vessel filter completes an electrical circuit between the positive electrode and the negative electrode.

8. The device according to claim 1, wherein the detector comprises a mechanical detector to signal contact with a vessel filter.

9. The device according to claim 1, wherein the detector comprises a magnetic detector.

10. The device according to claim 1, wherein the detector comprises an optical sensor.

11. The device according to claim 1, wherein the detector comprises a sensor sensing a signal from the vessel filter.

12. The device according to claim 1, wherein the detector comprises a thermocouple detector.

13. The device according to claim 1, wherein the gripper comprises a collapsible cone.

14. The device according to claim 1, wherein the gripper comprises:

an elongate support body having a central longitudinal axis;

a plurality of gripping members at the distal end of the elongate support body extending therefrom, wherein the gripping members are convertible between an expanded configuration, in which the gripper members extend from the central longitudinal axis, and a collapsed configuration, in which the gripping members are positioned closer to the longitudinal axis of the support body; and

a flexible liner connected to the gripping members forming an inner surface.

15. The device according to claim 1, wherein the gripper comprises a snare.

16. A vessel filter removal or repositioning device, comprising:

an elongate support body having a central longitudinal axis;

a collapsible cone gripper attached to the distal end of the support body, wherein the cone is configured to translate between an expanded configuration and a retracted configuration;

a detector, linked to the gripper, to detect the proximity of a vessel filter to the gripper; and

an output to indicate a signal from the detector.

17. The device according to claim 16, wherein the output comprises an LED.

18. The device according to claim 16, wherein the detector comprises a positive electrode and a negative electrode, wherein the positive electrode and the negative electrode are configured so that contact with a vessel filter completes an electrical circuit between the positive electrode and the negative electrode.

19. The device according to claim 16, wherein the detector comprises a pressure detector to signal contact with a vessel filter.

20. The device according to claim 16, wherein the detector comprises a magnetic detector to detect metal from the vessel filter.

21. The device according to claim 16, wherein the detector comprises an optical sensor to detect a vessel filter entering the collapsible cone gripper.

22. The device according to claim 16, wherein the detector comprises a signal sensor to sense a signal from the vessel filter.

31. A kit for repositioning or removing a vessel filter, comprising:

the vessel filter removal or repositioning device of claim 22;

and

instructions for using the vessel filter removal or repositioning device to remove or to reposition a vessel filter.

23. A vessel filter removal or repositioning device, the device comprising:

an elongate support body having a central longitudinal axis;

a plurality of gripping members at the distal end of the elongate support body extending therefrom, the gripping members being convertible between an expanded funnel-shaped configuration, in which the gripping members extend from the central longitudinal axis, and a retracted configuration, in which the gripping members are positioned closer to the longitudinal axis;

a flexible liner connected to the gripping members forming an inner surface; and

a positive electrode and a negative electrode, each in electrical connection to an output, the output being configured to indicate when a vessel filter contacts the positive and negative electrodes, completing an electrical circuit between the positive and negative electrodes.

24. The device according to claim 23, wherein the output comprises an LED.

25. The device according to claim 23, wherein at least one of the gripping members comprises a hook member formed from an elongate metallic material.

26. The device according to claim 23, wherein at least one of the gripping members comprises the positive or negative electrode.

27. The device according to claim 23, wherein either the positive or negative electrode comprises a wire surrounded by the gripping members.

28. The device according to claim 23, wherein the positive electrode comprises a loop of electrically conductive material encircling the central longitudinal axis.

29. The device according to claim 23, wherein the negative electrode comprises a cup region surrounded by the gripping members.

30. The device according to claim 23, further comprising a battery in electrical contact with the positive and negative electrodes.

32. A method of repositioning or removing a vessel filter, comprising:

inserting a vessel filter removal or repositioning device into a body vessel containing a vessel filter, said vessel filter removal or repositioning device comprising;

a gripper to remove or reposition a vessel filter from a body vessel;

a detector linked to the gripper to detect the proximity of a vessel filter to the gripper; and

an output to indicate a signal from the detector;

approaching the vessel filter within the body vessel with the vessel filter removal or repositioning device;

detecting the vessel filter with the vessel filter removal or repositioning device; and

gripping the vessel filter with the vessel filter removal or repositioning device.