Ultrasonic treatment for wounds

• US 6,273,864 B1
• Filed: 03/19/1999
• Issued: 08/14/2001
• Est. Priority Date: 02/14/1997
• Status: Expired due to Term

• Current Assignee: Exogen Inc. (Bioventus LLC)
• Original Assignee: Exogen Inc. (Bioventus LLC)
• Inventors: Talish, Roger J., Duarte, Luiz R.
• Primary Examiner(s): Smith, Ruth S.
• Application Number:
  US09/273,221
• Time in Patent Office: 879 Days
• Field of Search: 600/439, 600/459, 601/2-4, 310/311, 310/322, 310/334, 310/340
• US Class Current: 601/2
• CPC Class Codes: A61N 2007/0017 Wound healing
• CPC Class Codes: A61N 7/00 Ultrasound therapy lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 ; using ultrasound for introducing media into the body A61M37/0092

Abstract

A portable therapeutic device and method of use generate longitudinally propagating ultrasound and shear waves generated by such longitudinally propagating ultrasound to provide effective healing of wounds. A transducer having an operative surface is disposed substantially adjacent to the wound to emit ultrasound to propagate in the direction of the wound to promote healing. Reflections of the ultrasound by bone tissue, by skin layers, or by internally disposed reflective media propagate toward the wound as longitudinal waves, with shear waves generated by the longitudinal waves for the healing of the wound. A focusing element is used for focusing the propagation of the ultrasound at a predetermined angle toward the wound. The operative surface of the transducer may be annularly shaped to encircle the wound to convey the ultrasound and/or reflected ultrasound thereto. A housing may be provided for positioning the transducer near a portion of the skin near the wound, and for indenting the skin to form a cavity, with the transducer disposed in the cavity to emit the ultrasound toward an internal surface of the wound. Fixture structures, such as adjustable straps, may extend about a portion of the body to position the transducer near the wound.

Claims

1. A portable therapeutic device for delivering therapeutic ultrasound waves to a wound comprising:

a transducer having;

an operative surface for emitting ultrasonic waves sufficient to promote healing of the wound; and

an axis; and

a focusing element having at least one substantially straight side being substantially flush with the operative surface of the transducer for directing the ultrasonic waves toward an area offset from the axis by a predetermined angle toward the wound.

2. The portable therapeutic device of claim 1 wherein the transducer includes the focusing element.

3. The portable therapeutic device of claim 1, further comprising a fixture structure configured and dimensioned to extend about a portion of the body of the patient having the wound, for positioning the transducer substantially adjacent to a portion of skin substantially adjacent to the wound.

4. The portable therapeutic device of claim 1, further comprising a gel-like substance positioned adjacent to a surface of the focusing element for preventing the attenuation of ultrasonic waves.

5. A portable therapeutic device for promoting healing of a wound on or in a body, comprising:

a transducer comprising;

an operative surface for emitting of ultrasonic waves sufficient to promote healing of the wound; and

an axis; and

a focusing element acoustically coupled to the operative surface of the transducer, wherein the focusing element directs the propagation of the ultrasonic waves emitted by the transducer toward an area offset from the axis by an angle.

6. The portable therapeutic device of claim 5, wherein the operative surface of the transducer is substantially non-planar.

7. The portable therapeutic device of claim 5, wherein the operative surface of the transducer is substantially planar.

8. The portable therapeutic device of claim 7, wherein the focusing element is a substantially conical attachment acoustically coupled to the substantially planar surface of the transducer.

9. The portable therapeutic device of claim 5, wherein the area comprises at least one structure capable of reflecting the ultrasonic waves in the vicinity of the wound.