SURGICAL INSTRUMENT FOR REMOVING AN IMPLANTED OBJECT

• US 20160015963A1
• Filed: 03/13/2014
• Published: 01/21/2016
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Spectranetics Corporation (Koninklijke Philips N.V.)
• Original Assignee: Spectranetics Corporation (Koninklijke Philips N.V.)
• Inventors: GRACE, Kenneth P., HOO, Bruce A.
• Granted Patent: US 9,925,366 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• 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 2017/00455 Orientation indicators, e.g. recess on the handle
• 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: A61B 2017/32004 having a laterally movable cutting member at its most distal end which remains within the contours of said end
• CPC Class Codes: A61B 2090/08021 of the patient or his organs
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems

Abstract

Methods and devices for separating an implanted object, such as a pacemaker lead, from tissue surrounding such object in a patient'"'"'s vasculature system. Specifically, the tissue separating device includes a handle, an elongate sheath and a circular cutting blade that may extend from the distal end of the sheath upon actuating the handle. The elongate sheath, particularly its distal end, includes a non-uniform wall thickness having one or more thicker portions in the outer sheath, particularly the outer cam member, and/or one or more thicker portions in an inner member disposed radially inward of the blade.

Claims

1. A device for removing an implanted object from a body vessel, the device comprising:

a handle;

an elongated sheath extending from the handle, the elongated sheath comprising a proximal end, a distal end, and a lumen extending from the distal end toward the proximal end, wherein the lumen is configured to receive an implanted object, the elongated sheath further comprising a proximal portion and a distal portion;

a tubular outer member attached to the distal portion of the elongated sheath, wherein at least one portion of the tubular outer member has a non-uniform circumferential wall thickness;

a pin attached to the tubular outer member and extending inwardly thereof; and

a tubular inner member located within the outer member, the tubular inner member comprising a proximal end, a distal end and an exterior surface therebetween, the distal end comprising a cutting surface, the exterior surface of the inner member comprising a cam slot for receipt of and cooperation with the pin such that upon actuation of the handle, the inner member rotates and the distal end of the inner member extends beyond the distal end of the elongated sheath.

2. The device of claim 1, wherein the tubular non-uniform circumferential wall thickness comprises a first segment and a second segment, wherein the first segment has a thickness greater than the second segment.

3. The device of claim 2, wherein the first segment is disposed opposite the second segment along a cross section of a circumference of the tubular outer member.

4. The device of claim 2, wherein the tubular outer member comprises an outer surface, and wherein the first segment transitions to the second segment without interruption on the outer surface.

5. The device of claim 2, wherein at least one of the handle and the elongated sheath comprise an indicator indicative of a location of at least one of the first segment and the second segment.

6. The device of claim 1, wherein the non-uniform circumferential wall thickness comprises a first segment, a second segment and a third segment, wherein the first segment and the second segment have a thickness greater than a third segment.

7. The device of claim 6, wherein the first segment and the second segment have a substantially similar thickness profile.

8. The device of claim 1, wherein the tubular outer member has a proximal end portion and a distal end portion, wherein the at least one portion of the tubular outer member having a non-uniform circumferential wall thickness is located at least at the distal end portion.

9. The device of claim 8, wherein the at least one portion of the tubular outer member having a non-uniform circumferential wall thickness comprises a first segment having a thickness greater than a second segment.

10. The device of claim 8, wherein the at least one portion of the tubular outer member having a non-uniform circumferential wall thickness comprises a first segment and a second segment, wherein the first segment and the second segment have a thickness greater than a third segment.

11. The device of claim 1 tubular further comprising a third tubular member located within the inner member, wherein at least one portion of the third tubular member has a non-uniform circumferential wall thickness.

12. The device of claim 11, wherein the non-uniform circumferential wall thickness of the third tubular member comprises a first segment and a second segment, wherein the first segment has a thickness greater than the second segment.

13. A device for removing an implanted object from a body vessel, the device comprising:

a handle;

an elongated sheath extending from the handle, the elongated sheath comprising a proximal end, a distal end, and a lumen extending from the distal end toward the proximal end, wherein the lumen is configured to receive an implanted object, the elongated sheath further comprising a proximal portion and a distal portion;

a tubular outer member attached to the distal portion of the elongated sheath;

a pin attached to the tubular outer member and extending inwardly thereof;

a first tubular inner member located within the outer member, the first tubular inner member comprising a proximal end, a distal end and an exterior surface therebetween, the distal end comprising a cutting surface, the exterior surface of the first inner member comprising a cam slot for receipt of and cooperation with the pin such that upon actuation of the handle, the first inner member rotates and the distal end of the first inner member extends beyond the distal end of the elongated sheath; and

a second tubular inner member, wherein at least one portion of the second tubular inner member has a non-uniform circumferential wall thickness.

14. The device of claim 13, wherein the non-uniform circumferential wall thickness comprises a first segment and a second segment, wherein the first segment has a thickness greater than the second segment.

15. The device of claim 14, wherein the first second is disposed opposite the second segment along a cross section of a circumference of the second tubular inner member.

16. The device of claim 14, wherein the second tubular inner member comprises an interior surface, and wherein the first segment transitions to the second segment without interruption along the interior surface.

17. A device for removing an implanted object from a body vessel, the device comprising:

a handle comprising a trigger;

an elongated sheath extending from the handle, the elongated sheath comprising a proximal end, a distal end, and a lumen extending from the distal end toward the proximal end, wherein the lumen is configured to receive an implanted object, the elongated sheath further comprising a proximal portion and a distal portion;

a tubular outer member attached to the distal portion of the elongated sheath;

a pin attached to the tubular outer member and extending inwardly thereof;

a tubular inner member located within the outer member, the tubular inner member comprising a proximal end, a distal end and an exterior surface therebetween, the distal end comprising a cutting surface, the exterior surface of the inner member comprising a cam slot for receipt of and cooperation with the pin such that upon actuation of the handle, the inner member rotates and the distal end of the inner member extends beyond the distal end of the elongated sheath; and

a rotary actuator disposed within the housing, the rotary actuator comprising a linear slide coupled to the trigger, the linear slide comprising a shaft, wherein the shaft is coupled to the tubular inner member, such that upon linear actuation of the trigger, the tubular inner member rotates.

18. The device of claim 17, wherein the linear slide comprises a nut and leadscrew assembly, wherein the leadscrew comprises the shaft.

19. The device of claim 18, wherein the shaft comprises an exterior surface, wherein at least a portion of the exterior surface is threaded, and wherein the nut comprises a threaded portion and the threaded portion of the exterior of the shaft matingly engages with the threaded portion of the nut.

20. The device of claim 17, wherein the linear slide comprises a rolling ring bearing and an unthreaded shaft.