Device for treatment of wounds in body tissue of patients by exposure to jets of gas

• US 4,608,041 A
• Filed: 06/13/1983
• Issued: 08/26/1986
• Est. Priority Date: 10/14/1981
• Status: Expired due to Fees

• Current Assignee: Frese Nielsen
• Original Assignee: Frese Nielsen
• Inventors: Nielsen, Frese
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Kartchner, Gene B.
• Application Number:
  US06/504,689
• Time in Patent Office: 1,170 Days
• Field of Search: 128/114, 128/118, 128/24.1, 128/155, 128/156, 604/23, 604/305, 604/289
• US Class Current: 604/23
• CPC Class Codes: A61F 13/05 specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers
• CPC Class Codes: A61F 2013/0017 possibility of applying fluid
• CPC Class Codes: A61F 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00251 with macroscopic openings
• CPC Class Codes: A61F 2013/00825 protection of wound surround protecting the body against ulcers A61F2013/15024; protection in contaminated, e.g. NBC or industrial toxic ambience A61F2013/15065; prophylaxis A61F2013/15081; protection of the body or articulation A61F2013/00272; safety barrier for protection of the operator A61F2013/00297; skin protection A61F2013/00387; for protection of suture stitches A61F2013/00455
• CPC Class Codes: A61F 2013/00859 with macroscopic openings
• CPC Class Codes: A61F 2013/5395 with thermoplastic agent, i.e. softened by heat
• CPC Class Codes: A61F 2013/53966 by needling, sewing, blow-needling
• CPC Class Codes: A61M 35/30 Gas therapy for therapeutic treatment of the skin

Abstract

Device for treatment of wounds in body tissue of patients by means of jets of gas. A nozzle unit is designed to be placed over the area of the wound in order to cover it and is provided with inlets (6,10) for admission of oxygen gas to the area of the wound and outlets (9) for discharge of oxygen gas from the area of the wound. The inlets are designed to be connected by a hose (7) to a source of pressure containing air or oxygen gas. The nozzle unit is made of at least two layers of plastic foil (1,2) which are joined along the major part of their edges (3) enclosing an inner space, maintained mainly by the gas pressure, into which space the inlet (6) directs the flow. The nozzle unit is provided with a plurality of inlet openings (10) giving admission from the inner space (11) which openings are disposed in the layer of plastic foil (2) which is nearest to the area of the wound when the device is in use. These are designed to direct a plurality of gas jets at the area of the wound. A plurality of outlet openings (9) are so disposed in both layers of plastic foil (1,2) that gas from the area of the wound is made to escape out of the nozzle unit without passing through the inner space (11) on its way from the area of the wound.

Claims

1. A device for treating a wound in body tissue of a patient, comprising:

a nozzle unit to be placed over the wound so as to cover the wound and to separate the wound from surrounding space, an inlet for gas under pressure to the unit, said unit including a first and second layer of plastic foil, both having first surfaces where the layers are sealingly joined to each other including surfaces extending along a major part of the circumference of the unit, said first and second layers defining an inner space, said inlet communicating with said inner space so as to be sustained at least partly by gas pressure separating the first and second layers from each other at second surfaces, said first layer having a plurality of inlet openings leading from said inner space to the wound, said inlet openings being positioned in said second surfaces of said first layer, there being two rows of inlet openings with each row being displaced relative to a centerline between the two rows so that when the nozzle unit adjacent to each inlet opening assumes a curved configuration each inlet opening will be slanted with respect to the wound and a jet of gas exiting from each inlet opening will be directed obliquely at the wound, said first and second layers having a plurality of outlet openings positioned in at least part of said first surfaces, said outlet openings leading from the area of the wound directly to the surrounding space, so that the inlet openings may direct a plurality of gas jets from the inner space to the wound, and the outlet openings may let out gas directly to the surrounding space from the wound.

2. A device according to claim 1, wherein the inlet openings are disposed in a number of first spaced rows, and the outlet openings are disposed in a number of second rows alongside the first rows.

3. A device according to claim 2, wherein the rows of outlet openings are disposed in oblong sections, one section for each row, in said first surfaces of the two layers.

4. A device according to claim 1, wherein the inlet openings and the outlet openings are so dimensioned that excess pressure is created in a space between the nozzle unit and the wound.

5. A device according to claim 4, wherein said sections extend parallel to each other and have ends finishing at some distance from the circumference of the nozzle unit in such a manner that said inner space becomes a connected whole and when under gas pressure, forms cushion-like parts with domed surfaces.