Ultrasonic treatment for wounds

• US 6,190,336 B1
• Filed: 03/19/1999
• Issued: 02/20/2001
• 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:
  US09/273,214
• Time in Patent Office: 704 Days
• Field of Search: 601/2-4, 600/439
• 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 method of promoting healing of a body wound, wherein the body includes an interior body region, which is adjacent to the wound and which extends within the body and away from the wound, comprising:

positioning an ultrasonic transducer on a surface of the body, wherein the transducer has an operative surface disposed to direct ultrasonic waves toward the interior body region;

positioning a reflective medium within the body;

emitting ultrasonic waves from the operative surface of the ultrasonic transducer onto the reflective medium, whereby the reflective medium redirects at least a portion of the ultrasonic waves toward the wound sufficient to promote healing of the wound.

2. The method of claim 1, wherein positioning the reflective medium within the interior body region comprises fixing the reflecting medium in the body substantially adjacent to the body wound.

3. The method of claim 1, wherein the emitting of ultrasonic waves is at a spatial peak temporal average acoustic intensity ranging from about 5 mW/cm² to about 100 mW/cm².

4. The method of claim 1, wherein the portion of ultrasonic waves redirected toward the wound provides sufficient longitudinal waves to generate shear waves or surface acoustic waves at the body wound.

5. The method of claim 1, wherein positioning the reflective medium within the body comprises intravenously injecting the reflective medium into the body.

6. The method of claim 1, wherein the reflective medium is inorganic.

7. The method of claim 6, wherein the reflective medium is a metallic plate.

8. The method of claim 1, wherein the reflective medium is a gas filled pouch.