Selective treatment of endocardial/myocardial boundary

• US 6,156,029 A
• Filed: 11/25/1997
• Issued: 12/05/2000
• Est. Priority Date: 11/25/1997
• Status: Expired due to Fees

• Current Assignee: Eclipse Surgical Technologies, Inc. (Cryolife Incorporated)
• Original Assignee: Eclipse Surgical Technologies, Inc. (Cryolife Incorporated)
• Inventors: Mueller, Richard L.
• Primary Examiner(s): Dvorak, Linda C. M.
• Assistant Examiner(s): GIBSON, ROY DEAN
• Application Number:
  US08/978,036
• Time in Patent Office: 1,106 Days
• Field of Search: 606/7, 606/15, 607/88, 607/89, 607/101, 607/122
• US Class Current: 606/7
• 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 17/3203 Fluid jet cutting instruments
• CPC Class Codes: A61B 17/32075 Pullback cutting; combined forward and pullback cutting, e.g. with cutters at both sides of the plaque
• CPC Class Codes: A61B 18/00 Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body eye surgery A61F9/007; ear surgery A61F11/00
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 2017/00247 Making holes in the wall of the heart, e.g. laser Myocardial revascularization
• CPC Class Codes: A61B 2017/2905 flexible
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/32007 with suction or vacuum means
• CPC Class Codes: A61B 2018/00392 Transmyocardial revascularisation
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension

Abstract

A method for treating myocardium using at least one mechanical or electromagnetic energy functional device for forming a network of branched, interconnecting passages in a boundary between endocardium and myocardium, thereby enhancing blood flow into the treated zone, and a device for selectively treating ischemic myocardium tissue comprising a tube having proximal end and distal end, and at least one hollow lumen and defining an axis, at least two mechanical or electromagnetic energy functional devices disposed within the tube, the at least two mechanical or electromagnetic energy functional devices each having a distal end disposed adjacent the distal end of the central tube, and a deflecting member adjacent the distal portion of the central tube for deflecting the distal end of each of the at least two mechanical or electromagnetic energy functional devices away from the axis, for enabling treatment of selective areas of ischemic or hibernating myocardium tissue.

Claims

1. An apparatus for selective treatment of body tissue comprising:

a guide tube defining a longitudinal axis and having proximal and distal ends and a first lumen;

a treatment device having proximal and distal ends slidably mounted within the first lumen and egressible from the-distal end of the guide tube; and

a deflection and depth stop member disposed at the distal end of the guide tube;

whereby the deflection and depth stop member determines both depth of the entry of the treatment device into tissue and an angle of the treatment device relative to the longitudinal axis.

2. The apparatus of claim 1 wherein the treatment device comprises a plurality of separate treatment tools at least at the distal end thereof.

3. The apparatus of claim 2 wherein the deflection and depth stop member is adjustable between a maximum extension point and a position at the distal end of the guide tube and the apparatus further comprises a deflection and depth stop adjustment mechanism whereby movement of the member by the mechanism adjusts the angle of the plurality of treatment tools and distances between each of the plurality of treatment tools.

4. The apparatus of claim 3 wherein the each treatment tool is separately extendable and retractable within the first lumen of the guide tube.

5. The apparatus of claim 4 wherein the proximal end of the guide tube is trifurcated for entrance of the plurality of treatment tools.

6. The apparatus of claim 3 wherein the plurality of treatment tools are simultaneously extendable and retractable within the first lumen of the guide tube.

7. The apparatus of claim 3 wherein the deflection and depth stop adjustment member is a tether.

8. The apparatus of claim 7 further comprising a second lumen within the lumen of the guide tube encasing the tether.

9. The apparatus of claim 7 wherein the deflection and depth stop member is a cone shaped body at a distal end of the tether.

10. The apparatus of claim 7 wherein the deflection and depth stop member is a spherical body at a distal end of the tether.

11. The apparatus of claim 7 further comprising a handle coupled to the proximal end of the guide tube and through which the tether extends.

12. The apparatus of claim 3 wherein the plurality of treatment tools comprises at least one energy delivery device.

13. The apparatus of claim 12 wherein the at least one energy delivery device is a radio frequency delivery device.

14. The apparatus of claim 13 wherein the plurality of treatment tools further comprises a drug delivery device.

15. The apparatus of claim 12 wherein the at least one energy delivery device is an ultrasound energy delivery device.

16. The apparatus of claim 15 wherein the plurality of treatment tools further comprises a drug delivery device.

17. The apparatus of claim 12 wherein the at least one energy delivery device is a fluid jet delivery device.

18. The apparatus of claim 17 wherein the plurality of treatment tools further comprises a drug delivery device.

19. The apparatus of claim 12 wherein the at least one energy delivery device is a plurality of optical fibers each with a diameter in the range of about 25 to 1000 microns.

20. The apparatus of claim 19 wherein the optical fibers having a diameter of not more than 100 microns are also piercing devices for creating a pilot entry into myocardial tissue.

21. The apparatus of claim 19 wherein the optical fibers are bundled into more than one bundle at least at a distal end.

22. The apparatus of claim 12 wherein the at least one energy delivery device is a laser energy delivery device.

23. The apparatus of claim 22 wherein the plurality of treatment tools further comprises a drug delivery device.

24. The apparatus of claim 2 wherein the deflection and depth stop member is in a fixed position with regard to the guide tube.

25. The apparatus of claim 1 further comprising an angulation member coupled to the guide tube thereby causing angulation of a distal end of the apparatus.

26. The apparatus of claim 25 wherein the angulation member is at least one notched portion in an outer wall of the guide tube proximal to the distal end.

27. The apparatus of claim 1 wherein the deflection and depth stop member is located adjacent the distal end of the guide tube.

28. The apparatus of claim 1 wherein the deflection and depth stop member is located distal to the distal end of the guide tube.

29. The apparatus of claim 1 further comprising a piercing device adjacent the distal end ofthe guide tube for creating a pilot entry for the treatment device into myocardial tissue.

30. The apparatus of claim 1 wherein the treatment device is a laser energy delivery device.

31. The apparatus of claim 1 wherein the treatment device is a radio frequency energy delivery device.

32. The apparatus of claim 1 wherein the treatment device is an ultrasound energy delivery device.

33. The apparatus of claim 1 wherein the treatment device is a fluid jet delivery device.

34. The apparatus of claim 1 wherein the treatment device is a mechanical device.

35. The apparatus of claim 1 wherein the treatment device is a drug delivery device.

36. The apparatus of claim 1 further comprising one or more sensors at the distal end of the guide tube.

37. The apparatus of claim 1 further comprising a piercing tip at the distal end of the guide tube.