Apparatus and method for an ultrasonic medical device to treat peripheral artery disease

• US 20050043753A1
• Filed: 10/07/2004
• Published: 02/24/2005
• Est. Priority Date: 10/05/1999
• Status: Abandoned Application

• Current Assignee: Cybersonics, Inc
• Original Assignee: OmniSonics Medical Technologies, Inc.
• Inventors: Kelley, Craig T., Rabiner, Robert A., Hare, Bradley A.
• Application Number:
  US10/960,865
• Publication Number:
  US 20050043753A1
• Time in Patent Office: Days
• US Class Current: 606/159
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 2017/00137 Details of operation mode
• CPC Class Codes: A61B 2017/00274 Prostate operation, e.g. prostatectomy, turp, bhp treatment
• CPC Class Codes: A61B 2017/22007 Cavitation or pseudocavitation, i.e. creation of gas bubbles generating a secondary shock wave when collapsing
• CPC Class Codes: A61B 2017/22008 used or promoted
• CPC Class Codes: A61B 2017/22015 with details of the transmission member
• CPC Class Codes: A61B 2017/22018 segmented along its length
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61B 2017/320069 for ablating tissue
• CPC Class Codes: A61B 2017/320084 Irrigation sleeves
• CPC Class Codes: A61B 2017/320089 node location
• CPC Class Codes: A61B 2018/00547 Prostate
• CPC Class Codes: A61B 2018/00982 combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: A61N 7/022 intracavitary

Abstract

An apparatus and method for an ultrasonic medical device to treat peripheral artery disease. The ultrasonic medical device comprises an ultrasonic probe having a proximal end, a distal end and a longitudinal axis therebetween. The ultrasonic probe is inserted into an insertion point in a leg opposite the leg having an occlusional deposit and is moved adjacent to the occlusional deposit. An ultrasonic energy source is activated to generate a transverse ultrasonic vibration along at least a portion of the longitudinal axis of the ultrasonic probe. The transverse ultrasonic vibration creates a plurality of transverse nodes and a plurality of transverse anti-nodes along the longitudinal axis of the ultrasonic probe, generating cavitation in a medium surrounding the ultrasonic probe to ablate the occlusional deposit causing peripheral artery disease.

Claims

1. An ultrasonic medical device for treating peripheral artery disease comprising:

an ultrasonic probe having a proximal end, a distal end and a longitudinal axis between the proximal end and the distal end;

a transducer creating a transverse ultrasonic vibration along at least a portion of the longitudinal axis of the ultrasonic probe;

a coupling engaging the proximal end of the ultrasonic probe to a distal end of the transducer; and

an ultrasonic energy source engaged to the transducer that produces an ultrasonic energy,

wherein the transverse ultrasonic vibration produces a plurality of transverse anti-nodes along at least a portion of the longitudinal axis of the ultrasonic probe to ablate an occlusional deposit of peripheral artery disease.

2. The ultrasonic medical device of claim 1 wherein the ultrasonic probe has a flexibility allowing the ultrasonic probe to be deflected and articulated.

3. The ultrasonic medical device of claim 1 wherein the ultrasonic energy source delivers ultrasonic energy in a frequency range from about 10 kHz to about 100 kHz.

4. The ultrasonic medical device of claim 1 wherein the transverse ultrasonic vibration generates acoustic energy in a medium surrounding the ultrasonic probe.

5. The ultrasonic medical device of claim 1 wherein the transverse ultrasonic vibration along the longitudinal axis of the ultrasonic probe interacts with a medium surrounding the ultrasonic probe to create an acoustic wave in the medium.

6. The ultrasonic medical device of claim 1 wherein the ultrasonic energy source provides an electrical energy to the transducer.

7. The ultrasonic medical device of claim 1 wherein the ultrasonic energy source provides an electrical energy to the transducer at a resonant frequency of the transducer by finding the resonant frequency of the transducer.

8. The ultrasonic medical device of claim 1 wherein the ultrasonic probe supports the transverse ultrasonic vibration when flexed.

9. The ultrasonic medical device of claim 1 wherein the transverse ultrasonic vibration produces a plurality of transverse nodes along at least a portion of the longitudinal axis of the ultrasonic probe.

10. The ultrasonic medical device of claim 1 wherein the transverse ultrasonic vibration of the ultrasonic probe produces cavitation in a medium surrounding the ultrasonic probe to ablate the occlusional deposit to treat peripheral artery disease.

11. The ultrasonic medical device of claim 1 wherein the ultrasonic probe is disposable.

12. The ultrasonic medical device of claim 1 wherein the ultrasonic probe is for a single use on a single patient.

13. An ultrasonic medical device for ablating an occlusional deposit of peripheral artery disease comprising:

an ultrasonic probe having a proximal end, a distal end terminating in a probe tip and a longitudinal axis between the proximal end and the distal end;

a transducer that converts electrical energy into mechanical energy, creating a transverse ultrasonic vibration along the longitudinal axis of the ultrasonic probe;

and

a coupling engaging the proximal end of the ultrasonic probe and a distal end of the transducer,

wherein the transverse ultrasonic vibration generates a plurality of transverse anti-nodes along at least a portion of the longitudinal axis of the ultrasonic probe, creating cavitation in a medium surrounding the ultrasonic probe to ablate the occlusional deposit to treat peripheral artery disease.

14. The ultrasonic medical device of claim 13 wherein the transverse ultrasonic vibration generates acoustic energy in a medium surrounding the ultrasonic probe.

15. The ultrasonic medical device of claim 13 wherein the ultrasonic probe comprises a diameter that enables insertion into a vasculature.

16. The ultrasonic medical device of claim 13 wherein the ultrasonic probe comprises a diameter that allows the ultrasonic probe to be bent, flexed and deflected.

17. The ultrasonic medical device of claim 13 wherein a diameter of the ultrasonic probe is uniform diameter from the proximal end to the distal end.

18. The ultrasonic medical device of claim 13 wherein a diameter of the ultrasonic probe varies from the proximal end to the distal end.

19. The ultrasonic medical device of claim 13 wherein a cross section of the ultrasonic probe is approximately circular.

20. The ultrasonic medical device of claim 13 wherein a cross section of at least a portion of the ultrasonic probe is non-circular.

21. The ultrasonic medical device of claim 13 wherein the transverse ultrasonic vibration generates a plurality of transverse nodes along at least a portion of the longitudinal axis of the ultrasonic probe.

22. A method of treating peripheral artery disease comprising:

providing an ultrasonic medical device comprising an ultrasonic probe having a proximal end, a distal end terminating in a probe tip and a longitudinal axis between the proximal end and the distal end;

inserting the ultrasonic probe into a vasculature;

moving the ultrasonic probe adjacent to an occlusional deposit;

placing the ultrasonic probe in communication with the occlusional deposit; and

activating an ultrasonic energy source engaged to the ultrasonic probe to generate a transverse ultrasonic vibration along at least a portion of the longitudinal axis of the ultrasonic probe,

wherein the transverse ultrasonic vibration creates a plurality of transverse anti-nodes along a portion of the longitudinal axis of the ultrasonic probe.

23. The method of claim 22 further comprising creating a channel through the occlusional deposit with the ultrasonic probe.

24. The method of claim 22 further comprising puncturing a femoral artery to gain access to the vasculature.

25. The method of claim 22 further comprising puncturing a femoral artery in a leg having the occlusional deposit for an ipsilateral approach.

26. The method of claim 22 further comprising puncturing a femoral artery in a leg opposite a leg having the occlusional deposit for a contralateral approach.

27. The method of claim 22 further comprising accessing the vasculature with an introducer.

28. The method of claim 22 further comprising accessing the vasculature with a sheath.

29. The method of claim 22 further comprising accessing the vasculature with a catheter.

30. The method of claim 22 further comprising transmitting a transverse wave from the transverse ultrasonic vibration along the longitudinal axis of the ultrasonic probe to create an acoustic wave in the medium surrounding the ultrasonic probe.

31. The method of claim 22 further comprising delivering ultrasonic energy in a frequency range of about 10 kHz to about 100 kHz by the ultrasonic energy source.

32. The method of claim 22 further comprising generating acoustic energy in a medium surrounding the ultrasonic probe through the transverse ultrasonic vibration of the ultrasonic probe.

33. The method of claim 22 further comprising moving the ultrasonic probe back and forth along the occlusional deposit.

34. The method of claim 22 further comprising rotating the ultrasonic probe along the occlusional deposit.

35. The method of claim 22 further comprising sweeping the ultrasonic probe along the occlusional deposit.

36. The method of claim 22 further comprising providing an electrical energy to a transducer at a resonant frequency of the transducer by the ultrasonic energy source determining the resonant frequency of the transducer.

37. The method of claim 22 further comprising creating a plurality of transverse nodes from the transverse ultrasonic vibration along a portion of the longitudinal axis of the ultrasonic probe.

38. A method of ablating an occlusional deposit to treat peripheral artery disease comprising:

providing an ultrasonic medical device comprising an ultrasonic probe having a proximal end, a distal end and a longitudinal axis between the proximal end and the distal end;

inserting the ultrasonic probe into a femoral artery;

moving the ultrasonic probe into a peripheral artery;

placing the ultrasonic probe in communication with an occlusional deposit in the peripheral artery; and

activating an ultrasonic energy source engaged to the ultrasonic probe to produce an electric signal that drives a transducer of the ultrasonic medical device to produce a transverse ultrasonic vibration of the ultrasonic probe,

wherein the transverse ultrasonic vibration produces cavitation in a medium surrounding the ultrasonic probe to ablate the occlusional deposit.

39. The method of claim 38 further comprising transmitting a transverse wave from the transverse ultrasonic vibration along the longitudinal axis of the ultrasonic probe to create an acoustic wave in the medium surrounding the ultrasonic probe.

40. The method of claim 38 further comprising producing a plurality of transverse nodes and a plurality of transverse anti-nodes along a portion of the longitudinal axis of the ultrasonic probe.

41. The method of claim 40 wherein the plurality of transverse nodes are points of a minimum transverse ultrasonic vibration.

42. The method of claim 40 wherein the plurality of transverse anti-nodes are points of a maximum transverse ultrasonic vibration.

43. The method of claim 38 further comprising sweeping the ultrasonic probe along the occlusional deposit.

44. The method of claim 38 further comprising moving the ultrasonic probe back and forth along the occlusional deposit.

45. The method of claim 38 further comprising sweeping the ultrasonic probe back and forth along the occlusional deposit.

46. The method of claim 38 further comprising puncturing a femoral artery to gain access to a vasculature.

47. The method of claim 38 further comprising puncturing a femoral artery in a leg having the occlusional deposit for an ipsilateral approach.

48. The method of claim 38 further comprising puncturing a femoral artery in a leg opposite a leg having the occlusional deposit for a contralateral approach.