Apparatus and method for ultrasonic medical device with improved visibility in imaging procedures

• US 6,730,048 B1
• Filed: 12/23/2002
• Issued: 05/04/2004
• Est. Priority Date: 12/23/2002
• Status: Expired due to Fees

• Current Assignee: Cybersonics, Inc
• Original Assignee: OmniSonics Medical Technologies, Inc.
• Inventors: Prasad, Janniah S., Hare, Bradley A.
• Primary Examiner(s): Jaworski, Francis J.
• Application Number:
  US10/328,202
• Time in Patent Office: 498 Days
• Field of Search: 600/439, 601/2-4, 606/128, 606/159-169, 606/170, 606/171, 604/22
• US Class Current: 601/2
• 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 2017/00902 transparent or translucent
• CPC Class Codes: A61B 2017/22014 the ultrasound transducer being outside patient's body; with an ultrasound transmission member; with a wave guide; with a vibrated guide wire not applied in A61B17/22012
• CPC Class Codes: A61B 2017/22018 segmented along its length
• CPC Class Codes: A61B 2090/3925 ultrasonic
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers

Abstract

The present invention provides an apparatus and method for an ultrasonic medical device with improved visibility in imaging procedures. A medical device comprises an elongated probe having a material of high radiopacity at an at least one predetermined location of the probe wherein the material of high radiopacity is capable of withstanding series of vibrations of the elongated probe. The material of high radiopacity allows the elongated probe to be visualized in imaging procedures when the probe is inserted into a body. The present invention provides a method of improving the visibility of an ultrasonic medical device during a medical procedure by engaging a material of high radiopacity to a small diameter elongated probe wherein the material of high radiopacity engages the probe at an at least one predetermined location.

Claims

1. An ultrasonic medical device for destroying a biological material comprising:

an elongated, ultrasonic flexible probe having a proximal end, a distal end and a longitudinal length therebetween; and

a material of high radiopacity at an at least one predetermined location on an outside surface of the longitudinal length of the elongated, ultrasonic flexible probe, said probe adapted such that a transverse ultrasonic vibration along the longitudinal length of the elongated ultrasonic probe produces a plurality of nodes and a plurality of anti-nodes causing a biological material destroying effect along at least a portion of the longitudinal length including the material of high radiopacity.

2. The device of claim 1 wherein the material of high radiopacity comprises tantalum.

3. The device of claim 1 wherein the material of high radiopacity comprises a tantalum alloy.

4. The device of claim 1 wherein the material of high radiopacity is selected from the group consisting of tantalum, tungsten, gold, molybdenum and alloys thereof.

5. The device of claim 1 wherein the material of high radiopacity is biocompatible.

6. The device of claim 1 wherein the elongated, ultrasonic flexible probe comprises titanium.

7. The device of claim 1 wherein the elongated, ultrasonic flexible probe comprises a material of low radiopacity.

8. The device of claim 1 wherein the elongated, ultrasonic flexible probe comprises a material of high radiopacity.

9. The device of claim 1 wherein the elongated, ultrasonic flexible probe is comprised substantially of the material of high radiopacity.

10. The device of claim 1 wherein the elongated, ultrasonic flexible probe comprises the material of high radiopacity and a material of low radiopacity.

11. The device of claim 1 wherein the material of high radiopacity engages the elongated, ultrasonic flexible probe at a plurality of predetermined locations.

12. The device of claim 11 wherein a length of the plurality of predetermined locations of the material of high radiopacity is approximately equal.

13. The device of claim 11 wherein a length of the plurality of predetermined locations of the material of high radiopacity is unequal.

14. The device of claim 11 wherein a distance between the plurality of predetermined locations of the material of high radiopacity is approximately equal.

15. The device of claim 11 wherein a distance between the plurality of predetermined locations of the material of high radiopacity is unequal.

16. The device of claim 1 wherein the material of high radiopacity is located at the distal end of the elongated, ultrasonic flexible probe.

17. The device of claim 1 wherein the elongated, ultrasonic flexible probe has a diameter that enables insertion of the elongated, ultrasonic flexible probe into a vasculature of a body.

18. The device of claim 1 wherein the elongated, ultrasonic flexible probe comprises a substantially uniform diameter from the proximal end of the elongated, ultrasonic flexible probe to the distal end of the elongated, ultrasonic flexible probe.

19. The device of claim 1 wherein the elongated, ultrasonic flexible probe comprises a varying diameter from the proximal end of the elongated, ultrasonic flexible probe to the distal end of the elongated, ultrasonic flexible probe.

20. The device of claim 1 further comprising a plurality of transitions along the longitudinal length of the elongated, ultrasonic flexible probe to change a diameter from the proximal end to the distal end.

21. The device of claim 20 wherein the plurality of transitions gradually change the diameter from the proximal end to the distal end along the longitudinal length of the elongated, ultrasonic flexible probe.

22. The device of claim 20 wherein the plurality of transitions are stepwise to change the diameter from the proximal end to the distal end along the longitudinal length of the elongated, ultrasonic flexible probe.

23. The device of claim 1 wherein a diameter of the elongated, ultrasonic flexible probe slowly tapers from the proximal end to the distal end along the longitudinal length of the elongated, ultrasonic flexible probe.

24. The device of claim 1 wherein the elongated, ultrasonic flexible probe has a small cross sectional profile.

25. The device of claim 1 wherein the elongated, ultrasonic flexible probe vibrates in a direction transverse to at least a portion of the longitudinal length of the elongated, ultrasonic flexible probe.

26. The device of claim 1 wherein the elongated, ultrasonic flexible probe is for a single use on a single patient.

27. The device of claim 1 wherein the elongated, ultrasonic flexible probe is disposable.

28. An ultrasonic device for destroying a biological material comprising:

an elongated ultrasonic probe having a small diameter and a longitudinal length; and

a material having a high radiopacity at a plurality of predetermined locations on an outside surface of the longitudinal length of the elongated ultrasonic probe, said probe adapted such that a transverse ultrasonic vibration along the longitudinal length of the elongated ultrasonic probe produces a plurality of nodes and a plurality of anti-nodes causing a biological material destroying effect along at least a portion of the longitudinal length including the material of high radiopacity.

29. The device of claim 28 wherein the material having a high radiopacity is located at a distal end of the elongated probe.

30. The device of claim 28 wherein the elongated probe has a diameter that enables insertion of the elongated probe into a vasculature of a body.

31. The device of claim 28 wherein the elongated probe comprises a substantially uniform diameter from a proximal end of the elongated probe to a distal end of the elongated probe.

32. The device of claim 28 wherein the elongated probe comprises a varying diameter from a proximal end of the elongated probe to a distal end of the elongated probe.

33. The device of claim 28 wherein the material having a high radiopacity comprises tantalum.

34. The device of claim 28 wherein the material having a high radiopacity comprises a tantalum alloy.

35. The device of claim 28 wherein the material having a high radiopacity is selected from the group consisting of tantalum, tungsten, gold, molybdenum and alloys thereof.

36. The device of claim 28 wherein the material having a high radiopacity is biocompatible.

37. The device of claim 28 wherein a first material having a high radiopacity is located at a first predetermined location and a second material having a high radiopacity is located at a second predetermined location.

38. The device of claim 37 wherein the first material having a high radiopacity and the second material having a high radiopacity are the same.

39. The device of claim 37 wherein the first material having a high radiopacity and the second material having a high radiopacity are different.

40. A method of improving the visibility of an ultrasonic device for destroying a biological material during a medical procedure comprising;

providing a small diameter elongated ultrasonic probe having a longitudinal length;

engaging a material of high radiopacity to the small diameter elongated ultrasonic probe at an at least one predetermined location on an outside surface of the longitudinal length of the small diameter elongated ultrasonic probe; and

adapting the small diameter elongated ultrasonic probe such that a transverse ultrasonic vibration along the longitudinal length of the probe produces a plurality of nodes and a plurality of anti-nodes causing a biological material destroying effect along at least a portion of the longitudinal length including the material of high radiopacity.

41. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe at a plurality of predetermined locations.

42. The method of claim 41 wherein a distance between the plurality of predetermined locations of the material of high radiopacity is approximately equal.

43. The method of claim 41 wherein a distance between the plurality of predetermined locations of the material of high radiopacity is unequal.

44. The method of claim 41 wherein a length of the plurality of predetermined locations of the material of high radiopacity is approximately equal.

45. The method of claim 41 wherein a length of the plurality of predetermined locations of the material of high radiopacity is unequal.

46. The method of claim 40 wherein the material of high radiopacity is located at a distal end of the small diameter, elongated probe.

47. The method of claim 40 wherein the small diameter, elongated probe has a diameter that enables insertion of the small diameter, elongated probe into a vasculature of a body.

48. The method of claim 40 wherein the small diameter, elongated probe comprises a substantially uniform diameter from a proximal end of the small diameter, elongated probe to a distal end of the small diameter, elongated probe.

49. The method of claim 40 wherein the small diameter, elongated probe comprises a varying diameter from a proximal end of the small diameter, elongated probe to a distal end of the small diameter, elongated probe.

50. The method of claim 40 wherein a first material of high radiopacity is located at a first predetermined location and a second material of high radiopacity is located at a second predetermined location.

51. The method of claim 50 wherein the first material of high radiopacity and the second material of high radiopacity are the same.

52. The method of claim 50 wherein the first material of high radiopacity and the second material of high radiopacity are different.

53. The method of claim 40 wherein the small diameter, elongated probe comprises a plurality of sections of a material with low radiopacity and a plurality of sections of a material with high radiopacity.

54. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe by a process of butt-welding.

55. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe by a process of brazing.

56. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe by a process of shrink fitting.

57. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe by a process of lap welding.

58. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe by a process of threaded fitting.

59. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe by a process of twisting of materials.

60. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe by a mechanical connection.

61. The method of claim 40 wherein the material of high radiopacity engages the small diameter, elongated probe by a metallurgical connection.

62. The method of claim 40 wherein the material of high radiopacity comprises tantalum.

63. The method of claim 40 wherein the material of high radiopacity comprises a tantalum alloy.

64. The method of claim 40 wherein the material of high radiopacity is selected from the group consisting of tantalum, tungsten, gold, molybdenum and alloys thereof.

65. The method of claim 40 wherein the material of high radiopacity is biocompatible.

66. The method of claim 40 wherein the small diameter, elongated probe comprises titanium.

67. The method of claim 40 wherein the small diameter, elongated probe comprises a material of low radiopacity.

68. The method of claim 40 wherein the small diameter, elongated probe comprises a material of high radiopacity.

69. The method of claim 40 wherein the small diameter, elongated probe is comprised substantially of a material of high radiopacity.

70. The method of claim 40 wherein the small diameter, elongated probe comprises a material of high radiopacity and a material of low radiopacity.

71. The method of claim 40 wherein the small diameter, elongated probe comprises a proximal end, a distal end, a longitudinal length therebetween and a plurality of transitions along the longitudinal length.

72. The method of claim 71 wherein the plurality of transitions along the longitudinal length of the small diameter, elongated probe changes a diameter from the proximal end to the distal end.

73. The method of claim 71 wherein the plurality of transitions gradually change the diameter from a proximal end to a distal end along the longitudinal length of the small diameter, elongated probe.

74. The method of claim 71 wherein the plurality of transitions are stepwise to change the diameter from a proximal end to a distal end along the longitudinal length of the small diameter, elongated probe.

75. The method of claim 40 wherein a diameter of the small diameter, elongated probe slowly tapers from a proximal end to a distal end along a longitudinal length of the small diameter, elongated probe.

76. The method of claim 40 wherein the small diameter, elongated probe has a small cross sectional profile.

77. The method of claim 40 wherein the small diameter, elongated probe vibrates in a direction transverse to at least a portion of a longitudinal length of the small diameter, elongated probe.

78. The method of claim 40 wherein the small diameter, elongated probe is for a single use on a single patient.

79. The method of claim 40 wherein the small diameter, elongated probe is disposable.

81. The method of claim 79 wherein the medical procedure includes an imaging procedure.

82. The method of claim 79 wherein the imaging procedure is selected from the group consisting of fluoroscopy, radiography, tomography, digital x-ray imaging, ultrasound and magnetic resonance imaging (MRI).

80. A method of improving the visibility of an elongated ultrasonic probe having a small diameter for destroying a biological material comprising:

providing an elongated ultrasonic probe having a longitudinal length;

engaging a material of high radiopacity at a plurality of predetermined locations on an outside surface of the longitudinal length of the elongated ultrasonic probe, the material of high radiopacity allowing a location of the elongated probe to be detected when inserted into a body during a medical procedure; and

adapting the elongated ultrasonic probe such that a transverse ultrasonic vibration along the longitudinal length of the elongated ultrasonic probe produces a plurality of nodes and a plurality of anti-nodes causing a biological material destroying effect along at least a portion of the longitudinal length including the material of high radiopacity.

83. The method of claim 80 wherein the material of high radiopacity comprises tantalum.

84. The method of claim 80 wherein the material of high radiopacity comprises a tantalum alloy.

85. The method of claim 80 wherein the material of high radiopacity is selected from the group consisting of tantalum, tungsten, gold, molybdenum and alloys thereof.

86. The method of claim 80 wherein the material of high radiopacity is located at a distal end of the elongated probe.

87. The method of claim 80 wherein the material of high radiopacity engages the elongated probe by a process of butt-welding.

88. The method of claim 80 wherein the material of high radiopacity engages the elongated probe by a process of brazing.

89. The method of claim 80 wherein the material of high radiopacity engages the elongated probe by a process of shrink fitting.

90. The method of claim 80 wherein the material of high radiopacity engages the elongated probe by a process of lap welding.

91. The method of claim 80 wherein the material of high radiopacity engages the elongated probe by a process of threaded fitting.

92. The method of claim 80 wherein the material of high radiopacity engages the elongated probe by a process of twisting of materials.

93. The method of claim 80 wherein the material of high radiopacity engages the elongated probe by a mechanical connection.

94. The method of claim 80 wherein the material of high radiopacity engages the elongated probe by a metallurgical connection.