SURGICAL CORING SYSTEM

• US 20080009891A1
• Filed: 06/28/2007
• Published: 01/10/2008
• Est. Priority Date: 07/06/2006
• Status: Active Grant

• Current Assignee: Texas Heart Institute
• Original Assignee: Semmt Incorporated
• Inventors: COHN, William E.
• Granted Patent: US 7,744,527 B2
• Time in Patent Office: Days
• US Class Current: 606/170
• CPC Class Codes: A61B 17/32 Surgical cutting instruments A61B18/042 takes precedence; suture cutters A61B17/0467; instruments for ligaturing or cutting A61B17/128; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133
• 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 17/34 Trocars; Puncturing needles pointed biopsy instruments A61B10/0233; devices for piercing the ear-lobes A44C7/001; seals or hemostasis valves A61M39/06
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2017/00278 Transorgan operations, e.g. transgastric
• CPC Class Codes: A61B 2017/0243 for immobilizing local areas of the heart, e.g. while it beats trocars attached to inner organs or inner body tissue A61B2017/3488
• CPC Class Codes: A61B 2017/1135 End-to-side connections, e.g. T- or Y-connections Y-shaped blood vessel prostheses A61F2002/065
• CPC Class Codes: A61B 2017/306 holding by means of suction
• CPC Class Codes: A61B 2017/3425 for internal organs, e.g. heart ports
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61B 2017/3488 Fixation to inner organ or inner body tissue
• CPC Class Codes: A61B 90/50 Supports for surgical instruments, e.g. articulated arms
• CPC Class Codes: A61M 1/3653 Interfaces between patient blood circulation and extra-corporal blood circuit
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/178 drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
• CPC Class Codes: A61M 60/216 including a rotating member acting on the blood, e.g. impeller
• CPC Class Codes: A61M 60/861 Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body
• CPC Class Codes: A61M 60/863 Apex rings

Abstract

Novel surgical tools and methods for off-pump surgery are described herein. A novel coring system is disclosed which employs a balloon catheter and a coring tool which is adapted to be threaded on to a guide wire. The guide wire serves as a track upon which the coring tool is guided. Embodiments of the coring tool ensure complete removal and excision of cored tissue. In addition, the described coring system prevents blood loss during off-pump surgery. In an embodiment, a surgical coring tool comprises a hollow body having an open distal end and a closed proximal end. The open distal end has a cutting edge. The hollow body comprises a vacuum connection to apply suction from said hollow body. The surgical coring tool also comprises a hollow elongate member disposed coaxially within said hollow body. The elongate member is adapted to be inserted on to a guide wire.

Claims

1. A surgical coring tool comprising:

a hollow body having an open distal end and a closed proximal end, said open distal end having a cutting edge, wherein said hollow body comprises a vacuum connection to apply suction from said hollow body; and

a hollow elongate member disposed coaxially within said hollow body, wherein said elongate member is adapted to be inserted on to a guide wire.

2. The surgical coring tool of claim 1 wherein said hollow body is transparent.

3. The surgical coring tool of claim 1 wherein said hollow body comprises a polymeric material.

4. The surgical coring tool of claim 1 wherein said hollow body comprises a metal.

5. The surgical coring tool of claim 1 wherein said vacuum connection is located at said closed proximal end of said hollow body.

6. The surgical coring tool of claim 1 wherein said elongate member is coupled to said proximal end of said hollow body.

7. The surgical coring tool of claim 1, where said cutting edge has a beveled outer surface.

8. The surgical coring tool of claim 1 wherein said elongate member comprises a polymeric material.

9. The surgical coring tool of claim 1 wherein said elongate member is telescopic.

10. The surgical coring tool of claim 1 wherein said elongate member is attached to said closed end of said vacuum chamber.

11. The surgical coring tool of claim 1 further comprising a handle attached to said elongate member.

12. The surgical coring tool of claim 1 wherein said vacuum connection comprises a valve for adjusting vacuum.

13. The surgical coring tool of claim 1 further comprising a handle attached to said hollow body.

14. The surgical coring tool of claim 1 wherein said hollow body is cylindrical.

15. The surgical coring tool of claim 1, wherein said hollow body comprises:

a coring portion comprising said open distal end of said hollow body and an open proximal end;

a vacuum chamber coupled to the open proximal end of said coring portion, said vacuum chamber comprising the closed proximal end of said hollow body, wherein said vacuum chamber comprises said vacuum connection.

16. The surgical coring tool of claim 15 wherein said vacuum chamber is releasably coupled to said hollow coring portion.

17. The surgical coring tool of claim 15 wherein said vacuum chamber is releasably coupled to said hollow coring portion by a friction fit connection, a threaded connection, a bayonet connection, or a snap fit connection.

18. The surgical coring tool of claim 15 wherein said hollow coring portion has a smaller diameter than said vacuum chamber.

19. The surgical coring tool of claim 15 wherein said hollow coring portion has a larger diameter than said vacuum chamber.

20. The surgical coring tool of claim 15 wherein said hollow coring portion comprises a metal.

21. The surgical coring tool of claim 15 wherein said vacuum chamber is transparent.

22. A surgical coring system comprising:

a guide wire;

a coring tool comprising an elongate member adapted to be inserted on to said guide wire; and

a balloon catheter adapted to be coaxially mounted on to said guide wire.

23. The surgical coring system of claim 22, wherein said coring tool comprises:

a hollow body having an open distal end and a closed proximal end, said open distal end having a cutting edge, wherein said hollow body comprises a vacuum connection to apply suction from said hollow body; and

wherein said hollow elongate member is disposed coaxially within said hollow body.

24. The surgical coring system of claim 22, wherein said hollow body of said coring tool comprises

a coring portion comprising said open distal end of said hollow body and an open proximal end;

a vacuum chamber coupled to the proximal end of said coring portion, said vacuum chamber comprising the closed proximal end of said hollow body, wherein said vacuum chamber comprises said vacuum connection.

25. The surgical coring system of claim 22 wherein said balloon catheter when inflated has a diameter greater than the diameter of said coring tool.

26. A method of coring an organ comprising:

a) inserting a guide wire into the organ;

b) providing a coring tool adapted to be inserted on to the guide wire;

c) threading the coring tool on to the guide wire to guide the coring tool; and

d) inserting the coring tool into the organ to core a portion of the organ.

27. The method of claim 26, further comprising applying suction to coring tool so that the cored portion of the organ is sucked into the coring tool.

28. The method of claim 26 wherein the organ is a heart.

29. The method of claim 26 wherein inserting a guide wire into the organ comprises inserting the guide wire through the heart, through the aorta and the femoral artery.

30. The method of claim 26 further comprising inserting a balloon catheter from the femoral artery over the guide wire into the heart and inflating the balloon catheter, wherein the balloon catheter obstructs the hole in the organ after (d).