TIP FOR LEAD EXTRACTION DEVICE

• US 20120323252A1
• Filed: 06/16/2011
• Published: 12/20/2012
• Est. Priority Date: 06/16/2011
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Booker, Robert
• Granted Patent: US 9,649,490 B2
• Time in Patent Office: Days
• US Class Current: 606/129
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/32053 Punch like cutting instruments, e.g. using a cylindrical or oval knife A61B17/326 takes precedence; trepans A61B17/1695; for use on the cornea A61F9/007
• CPC Class Codes: A61B 17/3468 for implanting or removing devices, e.g. prostheses, implants, seeds, wires devices for implanting seeds A61M37/0069
• CPC Class Codes: A61B 2017/2903 transferring rotary motion
• CPC Class Codes: A61B 2017/2924 Translation movement of handle without rotating movement
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 2001/0578 having means for removal or extraction
• CPC Class Codes: A61N 2001/0585 Coronary sinus electrodes

Abstract

A tip engageable with an elongated sheath member for extracting a cardiac lead from an obstruction in a body vessel of a patient. The tip includes a tip body having a proximal end, a distal end, and a passageway extending therethrough. The tip body proximal end is engageable with the distal end of the sheath member distal end. The passageway of the tip is aligned with the passageway of the sheath such that the cardiac lead is receivable therein. The tip body distal portion has a plurality of sides extending circumferentially therearound, wherein the sides have respective ends and an inwardly directed radiused portion between the ends.

Claims

1. A tip engageable with an elongated sheath for extracting an implanted structure from an obstruction in a body vessel of a patient, the elongated sheath having a distal end and a passageway extending at least substantially therethrough, the tip comprising:

a tip body having a proximal portion, a distal portion, a substantially flat leading face, and a passageway extending therethrough, said tip body proximal portion engageable with said sheath distal end, said respective passageways dimensioned and aligned such that the implanted structure is receivable therein, said tip body distal portion comprising a plurality of sides extending circumferentially therearound, said sides having respective ends and an inwardly directed radiused portion between said ends.

2. The tip of claim 1, wherein said tip body distal portion comprises between about 7 and 13 sides, each of said sides having substantially the same configuration.

3. The tip of claim 2, wherein said tip body distal portion comprises 10 sides.

4. The tip of claim 1, wherein said radiused portion extends radially inwardly a distance between about 0.006 and 0.012 inch from an axial midpoint between said respective ends.

5. The tip of claim 4, wherein said radially inward distance is between about 0.008 and 0.010 inch.

6. The tip of claim 1, wherein said tip body passageway has a radiused circumferential edge at said substantially flat leading face.

7. The tip of claim 1, whereby said ends define respective radially outwardly directed edges.

8. The tip of claim 7, wherein each said edge intersects with said substantially flat leading face to define a point configured to facilitate disruption of said implanted structure from said obstruction upon a rotation of said tip.

9. The tip of claim 1, wherein said tip body has a smaller diameter proximal portion and a larger diameter distal portion, said smaller diameter proximal portion sized and configured for engagement with an inner surface of said sheath distal end, and wherein said tip body distal portion has a maximum outer diameter substantially similar to an outer diameter of said sheath distal end.

10. The tip of claim 9, wherein said tip body smaller diameter proximal portion includes an attachment member configured for engaging said inner surface of said sheath distal end.

11. The tip of claim 9, wherein the tip body distal portion has an axial length of between about 0.03 and 0.07 inch.

12. The tip of claim 9, wherein said larger diameter distal portion has a curved trailing surface.

13. The tip of claim 1, wherein said tip ends are spaced along a circumference of said tip such that a constant length is provided between adjacent ends.

14. The tip of claim 13, wherein each inwardly directed radiused portion is of constant dimension along the circumference of the tip.

15. A device for extracting an elongated implanted structure from an obstruction within a vessel of a patient, comprising:

an elongated sheath, said sheath having an outer diameter, and comprising a distal end and having a passageway extending therethrough, the sheath being sufficiently flexible to track over the implanted structure within the vessel; and

a tip having a proximal portion, a distal portion, a substantially flat leading face, and a passageway extending therethrough, said tip proximal portion engageable with said sheath distal end such that said passageways are aligned to receive said implanted structure therein, said tip distal portion having an outer diameter substantially the same as the outer diameter of the elongated sheath, and having an axial length of between about 0.030 and 0.070 inch, said tip distal portion comprising between about 7 and 13 sides extending circumferentially therearound, each of said sides having respective ends and an inwardly directed radiused potion between adjacent ends, each said end aligned to intersect with said substantially flat leading face to define a point configured to facilitate disruption of said implanted structure from said obstruction upon a rotation of said device.

16. The device of claim 15, wherein said tip body distal portion comprises 10 sides having substantially identical configurations.

17. A tip engageable with an elongated sheath for providing access to an interior of a vessel through an opening in a wall of the vessel for removing an elongated indwelling structure therefrom, the elongated sheath having a distal end and a passageway extending at least substantially therethrough, the tip comprising:

a tip body having a proximal portion, a distal portion, and a passageway extending therethrough, said tip body proximal portion engageable with said sheath distal end, said respective passageways dimensioned and aligned such that the implanted structure is receivable therein, said tip body distal portion comprising a. plurality of sides extending circumferentially therearound, said sides having respective ends, and a first radiused portion inwardly directed between adjacent ends, said ends axially extending in a distal direction beyond a distal face of said tip body to respective distal points, and a second radiused portion inwardly directed between adjacent points.

18. The tip of claim 17, wherein said tip body distal portion comprises between about 7 and 13 sides, each of said sides having substantially the same configuration.

19. The tip of claim 18, wherein said first radiused portion extends radially inwardly a distance between about 0.006 and 0.012 inch from an axial midpoint between said adjacent ends, and said second radiused portion extends inwardly a distance between about 0.050 and 0.080 inch from an axial midpoint between said adjacent points.

20. The tip of claim 19, wherein said tip body portion comprises ten sides.