DEVICE FOR TREATMENT OF WOUNDS IN BODY TISSUE OF PATIENTS BY EXPOSURE TO JETS OF GAS

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 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 said 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.

Description: Ti tle : Device for treatment of wounds in body tissue of patients by exposure to jets of gas. Technical field: The following invention relates to a device for treatme of wounds in body tissue of patients by exposure of the are of the wound to jets of gas, consisting o a nozzle pressur unit designed to be placed over the area of the wound in order to cover it, and provided with inlet allowing pressur gas to reach the area of the wound and outlet allowing gas to leave the area of the wound, the inlet of the nozzle pressure unit consisting of a main inlet opening leading to an enclosed space separated from the area of the wound into which space the gas is passed, an , in addition con¬ sisting of a plurality of inlet openings leading from the abovementioned space to the area of the wound. Background: Treating a wound with gas, for example oxygen gas, in order to hasten healing of the wound and reduce itching is known, and as a rule it is done by applying a jet of oxygen gas to the wound. Usually this is carried out by means of ' the end of a hose being held so as to aim at the wound, which requires the presence of staff who have to hold the hose and keep an eye on the exposed wound. The technical problem. The object of the present invention is to provide a device by means of which continuous treatment with oxygen gas can be carried out without the necessity of staff being present all the time. The solution: Said object is achieved by means of device which is characterised in that the nozzle unit is provided with a plurality of outlet openings forming said outlet,which openi are designed to let out the gas straight from the area of th wound into the environment without the gas passing through the abovcmentioned space on its way from the area of the w and that the inlet openings and the outlet openings are distributed together over the surface of the nozzle unit f the area of the wound in such a manner that the inlet openings direct a plurality of gas jets at the area of the wound and the outlet openings discharge gas from several different places between the inlet openings. Brief description of drawings: . A more detailed description of the invention is given below by means of an example of embodiment with reference t attached drawings in which Fig. 1 shows a view from above of the device according to the invention, and Fig. 2 shows a diagrammatic cross section of the device according to the invention applied over a wound of a patient. Best mode of carrying -out the invention: The device according to the invention is embodied as a nozzle unit consisting of two layers of plastic foil 1, 2 which are welded or- stuck -. ogether along an area of their outer edges 3 which is utilised for fixing the unit over th area of a wound (see Fig. 2). The fixing can be carrie.d o by means of plaster, tape 5 ι or the like. The unit is pro¬ vided with an inlet opening 6 and an inlet hose 7 connected to a source of pressure gas containing oxygen gas, air, or the like. The device is provided with several sections 8, in the example shown three, along which the two layers of plastic foil 1^ 2 are joined by means of welding, glueing or the like. In these sections the device is provided with a plurality of through-going outlet openings 9 ι disposed in rows ' which openings thus go through both layers of plas foil 1 ? 2. Next to these rows of outlet openings 9 t com prising in the example shown three rows of thirteen opening each, " here are a number of rows of inlet openings 10. To be more explicit, double rows of inlet openings are situate between the .rows of outlet openings, whilst outside the out openings rows of outlet openings 9 extend rectangularly. The inlet openings 10 are disposed in only one of the layer of plastic foil, namely the one shown in Fig. 2 and marked these openings thus being directed towards the area of the o eni are made simply by perforating the layers of plastic foil. When the interior of the device is connected to the gas supply by way of the inlet hose 7 there is formed a space 11, constituting a connected whole. nd having cushion-like parts which are inflated by the gas pressure, and thus are produced a great number of jets of gas passing first through the inlet openings 10 which direct the jets a,t the area of the wound 4. The unit being fixed over the area of the wound, ther is formed an air-filled space 12 above the area of the wound from which the oxygen gas can escape through the outlet openings into the air outside. In the cushion-like parts domed surfaces l6 are formed in the layers of plastic foil 1 2 . The rows of inlet openings 10 being oriented - next to an imaginary centre line between the parallel sections the inlet openings and consequently the jets of gas are made - oblique in relation to the area of the wound , and the jets are thrown back towards the adjacent .rows of outlet openings 9. Hereby is obtained a very effective and even treatment of the area of the wound, obviating the necessity of supervisin staff. This is particularly advantageous as the treatnent in question is frequently carried on for a long period of time, which would otherwise be costly. The effect of the treatment by means of the device according to the invention is very even, ' the area of the wound being shielded from the outside air whereby is achieved a particularly good healing effect because .of the high concentration of sterile air or oxygen gas in the area of the wound in the absence of room air which always contains a certain amount of germs. The nozzle unit gives gentle protection to the area of the wound, especially when the latter is subjected to contact pressure, for example when the patient is lying down, the unit forming a pressure relieving, protective cushion which, activated by the gas pressure in the area of the wound, endeavours (sic) to avoid touching the surface of the wound. The nozzle unit according to the invention can be made very simply and cheaply and should subsequently be sterilised and packed in sterile wrapping. The device is particularly space-saving, as it is very flat when packed and, with the exception of the hose connection 7 ι is of a total thickness of two layers of plastic foil. The unit might possibly be supplied without the hose and only provided with the passage 13 . shown in Fig. 1-and formed where the two layers oCplastic foil 12 are not welded together, an area extending from the part of the edge 1 of the layers of plastic foil to the inner space 11. With the device can be used an inlet hose 7 otherwise belonging to the oxygen gas equipment and designed to be simply pushed into the inlet passage 6 of the nozzle unit for connection to it. The inlet hose 7 should in this case preferably have a conical or pointed end to facilitate its insertion. The invention is not limited to the above described example of embodiment shown in the drawings, but can be varied within the scope of the following Claims. The rows of inlet and outlet openings can, for Example, be arranged differently.

Claims: Claims : 1. Device for treatment of wounds in body tissue (l6) of patients by exposure of the area of the wound (4) to jets of gas, consisting of a nozzle pressure unit, designed to be 5 placed over the area of the wound (4) so as to cover it and provided with inlet (6) for pressure gas to reach the area of the wound and outlet (9) for gas to leave the area of the wound, the inlet of the nozzle pressure unit consisting of a main inlet (6) into an enclosed space separated from 10 the area of the wound into which space the gas ent ers , and also consisting of a plurality of inlet openings (10) giving admission from the abovementioned space to the area of the wound , c h a r a c t e r i s e d- i n t h a t the nozzle unit is provided with a plurality of outlet openings. 15 constituting said outlet (9) and designed to remove the gas from the area of the wound (4) letting it out straight into.- .. .the environment without it having to pass through said space on its way from the area of the wound, and that the inlet openings (10) and the outlet openings (9) are distributed 0 together over the surface of the nozzle. unit facing the area of the wound in such a manner that the inlet openings direct a plurality of gas jets at the area of the wound .and the outlet openings let out gas from several different places between the inlet openings. 5 2. Device according to Claim 1, c h a r a c t e r i s e d i n t h a t the nozzle unit is made of at least two layers of plastic foil (1,2) joined to each other along the major part of their edges (3) enclosing the inner space (11) which is sustained mainly by the gas pressure, the inlet openings (10 0 being disposed in the layer of plastic foil (2) wnich is nearest to the area 0 f the "wound (4) when the device is in use, and the outlet openings (9) being disposed in both layers of plastic foil (1,2) with their i'nsides facing the area of the wound and their outsides facing the environment outside the 5 nozzle unit in such a manner that gas from the area of the wound is made to escape straight from the area of the wound to the environment outside the nozzle unit without having to pass through said inner space (11) on its way from the area- of the wound, and furthermore in that the inlet openings are 0 designed solely to admit gas to the area of the wound and the outlet openings are designed solely to let out gas from the area of the wound and into the surroundings. 3. • Device according to Claim 2, c h a r a c t e r i s e d i n t h a t the two layers of plastic foil (1,2) are joined around the outlet openings (9) whereby the latter are separated from the inner space (11). 4. Device according to Claim 3 » c h a r a c t e r i s e d i n t h a t the inlet openings (10) are disposed ±n a number of spaced rows while the outlet openings (9) are disposed in a number of rows alongside the firstmentioned rows 5. Device according to Claim 4, c h a r a c t e r i s e d i n h a t the rows of outlet openings (9) are disposed in longish sections (8), one section for each row, in which the two layers of plastic foil (1,2) adhere tightly to each other. : 6. Device according to any of the preceding Claims, c h a r a c t e r i s e d i n t h a .t the inlet openings (1 and the outlet openings (9) are so dimensioned that excess pressure is created in a space between the nozzle unit and the area of the wound. 7. Device according to Claim 5, c h a r a c t e r i s e d i h a t said sections (8) extend parallel to each other their ends finishing at some distance from the edge (3) of the nozzle unit in such a manner that said inner space (11 becomes a connected whole and, when the device is in use, forms cushion-like parts with domed surfaces (l6). 8. Device according to Claim 7, c h a r a c t e r. i s e d i n t h a t the rows of inlet openings (10) are two in number in each space between two adjacent ones of said section (8) which two rows are oriented next to the centre line between both sections whereby each inlet opening (10) is slanted and the jets of oxygen gas directed obliquely at the area of the wound (4).

Inventors: NIELSEN FRESE, NIELSEN, FRESE
Applicants: NIELSEN FRESE, NIELSEN, FRESE
Application year: 1982
Main classification: A61M35
IPC codes: A61F13, A61M35