Focused ultrasound ablation devices having malleable handle shafts and methods of using the same

• US 6,361,531 B1
• Filed: 01/21/2000
• Issued: 03/26/2002
• Est. Priority Date: 01/21/2000
• Status: Expired due to Term

• Current Assignee: Medtronic Xomed Surgical Products Inc (Medtronic Plc)
• Original Assignee: Medtronic Xomed Incorporated (Medtronic Plc)
• Inventors: Hissong, James B.
• Primary Examiner(s): Dvorak, Linda C. M.
• Assistant Examiner(s): FARAH, AHMED M
• Application Number:
  US09/488,844
• Time in Patent Office: 795 Days
• Field of Search: 600/437-446, 600/439, 606/32, 606/78, 606/14, 604/22
• US Class Current: 606/27
• CPC Class Codes: A61B 2018/00196 reciprocating lengthwise
• CPC Class Codes: A61B 2018/1861 with an instrument inserted into a body lumen or cavity, e.g. a catheter
• CPC Class Codes: A61N 2007/0078 with multiple treatment transducers
• CPC Class Codes: A61N 7/02 Localised ultrasound hyperthermia hyperthermia in general A61F7/00

Abstract

A focused ultrasound ablation device includes an ultrasound emitting member and a handle shaft having a distal end at which the ultrasound emitting member is disposed. The handle shaft is malleable to permit selective, manual shaping of the handle shaft to access a selected anatomical operative site from a remote location and/or to orient the ultrasound emitting member for contact with anatomical tissue at the selected operative site. A method of thermally ablating anatomical tissue includes the steps of manually shaping a malleable handle shaft to orient an active face of an ultrasound emitting member at a distal end of the shaft to contact anatomical tissue at a selected operative site, positioning the active face against the anatomical tissue at the operative site while a proximal end of the handle shaft is disposed at a remote location; emitting ultrasound energy from the ultrasound emitting member; focusing the ultrasound energy at one or more focusing zones within a target area in the tissue and located a predetermined distance in front of the active face and heating the tissue at the target area with the focused ultrasound energy to create a lesion.

Claims

1. A focused ultrasound ablation device for creating a lesion at a target area in anatomical tissue of a patient comprising

an ultrasound emitting member from which ultrasound energy is emitted and by which the emitted ultrasound energy is focused a predetermined distance from said ultrasound emitting member;

a handle shaft having a distal end at which said ultrasound emitting member is disposed and having a proximal end; and

a handle at said proximal end of said handle shaft, said handle having an operative position in which said handle is disposed in a predetermined orientation for optimal grasping by a hand of an operator, said handle shaft being sufficiently malleable to assume a selected configuration in order to selectively position said ultrasound emitting member horizontally, vertically and transversely in a selected orientation at an operative site of a patient'"'"'s body so that the ultrasound energy emitted by said ultrasound emitting member is focused at a selected target area in anatomical tissue of the patient to create a lesion at the target area while said handle remains in said predetermined orientation in said operative position.

2. The focused ultrasound ablation device as recited in claim 1 wherein said ultrasound emitting member focuses the ultrasound energy in front of said ultrasound emitting member.

3. The focused ultrasound ablation device as recited in claim 2 wherein said ultrasound emitting member includes an active face and the ultrasound energy is focused said predetermined distance from said active face.

4. The focused ultrasound ablation device as recited in claim 3 wherein said handle shaft, once shaped to assume a selected configuration, maintains said selected configuration until said handle shaft is shaped to assume another, different, selected configuration.

5. The focused ultrasound ablation device as recited in claim 4 wherein said handle shaft has a central longitudinal axis and is selectively, manually, torsionally adjustable by being rotated about said central longitudinal axis as permitted by the malleability of said handle shaft.

6. The focused ultrasound ablation device as recited in claim 4 wherein said handle shaft is selectively, manually, longitudinally adjustable to orient said active face to face a desired direction from said focused ultrasound ablation device.

7. The focused ultrasound ablation device as recited in claim 4 wherein said handle shaft is selectively, manually, longitudinally adjustable to orient said active face at various angles.

8. A focused ultrasound ablation device for creating a lesion at a target area in anatomical tissue of a patient comprising

an ultrasound emitting member from which ultrasound energy is emitted and by which the emitted ultrasound energy is focused a predetermined distance from said ultrasound emitting member;

and

a handle shaft having a distal end at which said ultrasound emitting member is disposed and having a proximal end connected to a handle, said handle shaft having a length extending from said handle to said ultrasound emitting member, said handle shaft being malleable over the entirety of said length for selective, manual, adjustment in vertical and horizontal directions whereby said handle shaft is shapeable to assume a selected configuration in order to position said ultrasound emitting member at an operative site of a patient'"'"'s body so that the ultrasound energy emitted by said ultrasound emitting member is focused at a selected target area in anatomical tissue of the patient to create a lesion at the target area while said handle is disposed at a location remote from the operative site.

9. A focused ultrasound ablation device for creating a lesion at a target area in anatomical tissue of a patient comprising

an ultrasound emitting member from which ultrasound energy is emitted and by which the emitted ultrasound energy is focused at one or more focusing zones disposed a predetermined distance from a planar active face of said ultrasound emitting member;

an elongate handle shaft having a central longitudinal axis, a distal end at which said ultrasound emitting member is disposed and having a proximal end; and

a handle at said proximal end of said handle shaft, said handle shaft being malleable for selective, manual adjustment whereby said active face of said ultrasound emitting member is oriented to contact anatomical tissue of a patient so that the ultrasound energy emitted by the ultrasound emitting member is focused within a selected target area in the anatomical tissue to create a lesion at the target area while said handle is disposed in an operative position, said handle shaft being sufficiently malleable to orient said planar active face horizontally, vertically and transversely to said central longitudinal axis.

10. The focused ultrasound ablation device as recited in claim 9 wherein said handle shaft is adjustable, as permitted by its malleability, to orient said active face to be disposed at a selected angle to said handle.

11. The focused ultrasound ablation device as recited in claim 10 wherein said handle shaft is adjustable to orient said active face to face upwardly when said handle is in said operative position.

12. The focused ultrasound ablation device as recited in claim 11 wherein said handle shaft is adjustable to orient said active face to face downwardly when said handle is in said operative position.

13. The focused ultrasound ablation device as recited in claim 12 wherein said handle shaft is adjustable to orient said active face to face laterally when said handle is in said operative position.

14. The focused ultrasound ablation device as recited in claim 13 wherein said handle shaft is adjustable to orient said active face to face forwardly when said handle is in said operative position.

15. A focused ultrasound ablation device for creating a lesion at a target area in anatomical tissue of a patient comprising

an ultrasound emitting member from which ultrasound energy is emitted and by which the emitted ultrasound energy is focused a predetermined distance in front of said ultrasound emitting member;

an elongate handle shaft having a distal end at which said ultrasound emitting member is disposed and having a proximal end; and

a handle at said proximal end of said handle shaft, said handle shaft being malleable for selective, manual adjustment in axial and torsional directions to selectively orient said ultrasound emitting member so that the ultrasound energy is emitted in a desired direction from said handle shaft whereby the ultrasound energy is focused at a selected target area in anatomical tissue adjacent said ultrasound emitting member while said handle is disposed at a location remote from the anatomical tissue.

16. The focused ultrasound ablation device as recited in claim 15 wherein said handle shaft is adjustable, as permitted by its malleability, to selectively orient said ultrasound emitting member so that the ultrasound energy is emitted in a direction laterally from said handle shaft.

17. The focused ultrasound ablation device as recited in claim 16 wherein said handle shaft is adjustable, as permitted by its malleability, to selectively orient said ultrasound emitting member so that the ultrasound energy is emitted in a direction laterally upwardly from said handle shaft.

18. The focused ultrasound ablation device as recited in claim 16 wherein said handle shaft is adjustable, as permitted by its malleability, so that the ultrasound energy is emitted in a direction laterally from a side of said handle shaft.

19. The focused ultrasound ablation device as recited in claim 16 wherein said handle shaft is adjustable, as permitted by its malleability, so that the ultrasound energy is emitted in a direction laterally downwardly from said handle shaft.

20. The focused ultrasound ablation device as recited in claim 18 wherein said handle shaft is adjustable, as permitted by its malleability, so that the ultrasound energy is emitted in a direction forwardly of said focused ultrasound ablation device.

21. A method of thermally ablating anatomical tissue of a patient comprising the steps of

providing a focused ultrasound ablation device comprising an ultrasound emitting member including an active face carried at a distal end of a malleable handle shaft having a proximal end connected to a handle having an operative position in which the handle is in a predetermined orientation for optimal grasping with a hand;

selecting one of a plurality of different orientations for the active face, said step of selecting including selecting an orientation in which the active face is oriented to contact anatomical tissue at an operative site of the patient'"'"'s body while the handle is disposed at a location remote from the operative site;

manually shaping the malleable handle shaft to orient the active face to assume the selected orientation;

grasping the handle with the hand with the handle in the operative position;

positioning the active face against the anatomical tissue at the operative site while the handle is disposed at the location remote from the operative site;

emitting ultrasound energy from the ultrasound emitting member;

focusing the ultrasound energy at one or more focusing zones within a target area in the anatomical tissue and located a predetermined distance in front of the active face; and

heating the tissue at the target area with the focused ultrasound energy to form a lesion.

22. The method of thermally ablating anatomical tissue as recited in claim 21 wherein said step of positioning includes introducing the handle shaft through an anatomical passageway of the patient to position the active face at the operative site while the proximal end of the handle shaft is disposed externally of the patient'"'"'s body.

23. The method of thermally ablating anatomical tissue as recited in claim 22 wherein said step of manually shaping includes manually shaping the handle shaft for accommodation in the anatomical passageway.

24. The method of thermally ablating anatomical tissue as recited in claim 23 wherein said step of manually shaping includes manually shaping the handle shaft to assume a longitudinal configuration conforming to the longitudinal configuration of the anatomical passageway.

25. The method of thermally ablating anatomical tissue as recited in claim 21 wherein said step of manually shaping includes manually shaping the handle shaft to orient the active face to be disposed at a selected angle relative to the handle shaft.

26. The method of thermally ablating anatomical tissue as recited in claim 25 wherein said step of manually shaping includes manually shaping the handle shaft to orient the active face to face upwardly from the handle shaft.

27. The method of thermally ablating anatomical tissue as recited in claim 25 wherein said step of manually shaping includes manually shaping the handle shaft to orient the active face to face downwardly from the handle shaft.

28. The method of thermally ablating anatomical tissue as recited in claim 25 wherein said step of manually shaping includes manually shaping the handle shaft to orient the active face to face laterally from the handle shaft.

29. The method of thermally ablating anatomical tissue as recited in claim 21 and further including the step of manually reshaping the handle shaft so that the active face assumes another one of the plurality of different orientations with the handle in the operative position.