DE202010004876U1 - Multifunction gauze pad - Google Patents

Abstract

Gauze pad made of plastic gauze with mesh sizes of 51 microns to 200 microns, open area of 30 to 55%, thread count in warp and weft, but each independently if necessary from 30 / cm to 120 / cm, and yarn diameter in warp and weft, respectively but optionally independently from 30 microns to 300 microns characterized in that they have one or two adhesive edges of polyacrylate.

Description

Summary

A Gauze is made with the help of two-sided adhesive stripes on the Skin attached, that this is painlessly removable and at the same time adheres firmly for at least 72 hours.

description

Hard-healing wounds heal only when the dead tissue is removed (debridement). Larvae of calliphorids in the larval stage 1 . 2 or 3 are therefore used to selectively separate dead tissue from living tissue and thus achieve this medically desired effect. The larvae must be fixed at the point where they should be used.

State of the art

Various solutions for fixing the larvae are offered in the literature. So these can be enclosed in gauze bags ( GB 2 422 315 . DE 10 2004 045 284 . DE 199 25 996 . EP 1 247 536 . JP 2009 131 451 ), which solution prevents direct access of the larvae to the tissue to be ablated. This is associated with active losses, which are undesirable.

Other Possibilities are the fixation by open gazes, which over to stretch the wound. These gauzes are on the edge with adhesive film fixed. This results in free skin between the edge of the wound and the end of the gauze, damaged by the larval secretions can be.

In US 2010 0010 458 a combination of a gauze and a base is presented. The pad is dimensioned so that it covers the wound edge, the gauze is fixed to this pad by gluing. This combination is difficult to accurately cut so that wound margin remains clear which can then be damaged. Also, the combination is predetermined in size and shape, so that they can not be used flexibly. However, wounds do not have a predetermined size or shape, making it difficult to use.

task

• • eine Gaze fest auf Haut oder anderen auf Haut angebrachten Materialien befestigt und
• • flexibel eingesetzt werden kann.

It was therefore necessary to find a device that

• • a gauze firmly attached to skin or other materials attached to skin and
• • can be used flexibly.

Troubleshooting

Simple and comfortable, the problem was solved by using a gauze of appropriate mesh size, suitable for larvae of the stage 1 . 2 or 3 of Lucilia sericata or other larvae used in wound therapy is provided with a polyacrylate adhesive tape or other double-sided adhesive material at the edge so that the gauze can be tightly and flexibly adhesive to skin used (example see drawing A) ,

Surprised was found that the bond strength of the polyacrylate adhesive does not decrease as expected if these were previously thermal or hydrothermal pretreated, but increases significantly. In particular, surprisingly is that, since polyacrylate adhesive generally with water sources or shrinkage, which would lower the bond strength, However, the hydrothermal treatment increased this many times. This applies to the bond between the skin and the adhesive edge as well as between the gauze (preferably polyester) or other materials in wound care are common, such as polyurethane films. Also, the bond strength between two adhesive edges is significantly increased, these were previously hydrothermally treated.

Suitable gauzes are made of polyester, polycarbonate, polyamide, or other similar synthetic fibers, preferably polyester and have the following data:
Mesh size from 51 μm to 200 μm, preferably 100 μm,
open area of 30 to 55%, preferably 32%,
Thread count in warp and weft, but if necessary, independently of each other from 30 / cm to 120 / cm, preferably both 57 / cm
Garndurchmesser in warp and weft, but if necessary, independently of each other from 30 microns to 300 microns, preferably both 77 microns.

The pads can be designed so that the adhesive edge is attached on one side or on both sides (example in drawing A is double-sided, 1 = Protective layer for the adhesive edge, removable, 2 = Adhesive edge, 3 = Gauze). For double-sided application, it is possible to apply the pads overlapping on a large or otherwise shapeless wound, the glued edges are then glued together at the bottom and top so that a closed surface is obtained, which corresponds to the wound best. The second adhesive edge also serves to additionally fix further gauzes or wound coverings. This makes the pad multifunctional.

The Protective layer for the adhesive edge is made of polyethylene or polypropylene, preferably polypropylene. The adhesive edge is made preferably polyacrylate.

The thermal treatment, which increases the bond strength, takes place at 60-200 ° C, preferably at 90-130 ° C. It lasts 1 min to 8 h, preferably 30 min.

The Hydrothermal treatment takes place at 100-190 ° C in water vapor, preferably at 121 ° C. It lasts from 1 to 60 min, preferably 15-25 min.

Examples

A. State of the art:

LeFlap from the manufacturer Monarch-Labs, USA (according to US 2010 0010 458 ) is cut and glued on skin. Sticking is only possible on skin areas, where this is sufficiently "flat" or uniformly curved, so that LeFlap can adapt to this. The gauze, in turn, can be fixed with difficulty so that no gaps. After 20 to 35 h, the gauze is easily detached from the lower layer where it had previously been taut due to the curvature of the skin and larvae can easily escape. This is not changed by the additional application of additional tapes on the edge nothing. The construction is removable only by pulling on it, which can cause pain.

B. According to the invention:

A PAD as shown in drawing A ( 1 = Protective layer for the adhesive edge, removable, 2 = Adhesive edge, 3 = Gauze), hydrothermally at 121 ° C and 20 min is treated after removal of the protective layer 1 glued to a wound that was previously covered with a polyurethane film with polyacrylate adhesive (example: Fixomull of BSN medical, or Suprasorb by Lohmann & Rauscher) so that the wound edges are covered, but the wound center has remained free, which is now closed. The PAD sticks even after 72 h and all sides are tightly closed, so that the larvae could not escape. The additional application of additional adhesive tapes on the edge improves the mechanical stability against disturbing influences from the outside, but is not absolutely necessary. The construction is easily and painlessly removable by stretching the underlying foils.

C. Bonding without hydrothermal treatment (State of the art):

A Polyacrylate film is coated on a 100 μm polyester gauze Glued on width. After 1 h, the adhesive film is removed again. The force to be spent on this is with a spring balance measured, less than 50 g.

D. Bonding with hydrothermal treatment (Invention):

The same polyacrylate film as in Example C is on a polyester gauze glued on with 100 μm mesh size. The gauze treated in this way is hydrothermally for 20 min at 121 ° C in an autoclave treated. After 1 h, the adhesive film is removed again. The power to spend this is measured with a spring balance, larger than 90 g, usually 250-400 g.

E. Adhesion to wound size:

A Polyester gauze coated with polyacrylate film at 100 μm Mesh size is adhered to a polyurethane film called as Wound limitation consumed was glued. The wound is caused by a Pad not completely covered, leaving a second pad as shown in drawing A, slightly overlapping is used for the first. After 72 h, the entire construction is still just as close to larval flight, as a uniform piece Gauze.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - GB 2422315 [0003]
• - DE 102004045284 [0003]
• - DE 19925996 [0003]
• EP 1247536 [0003]
• - JP 2009131451 [0003]
• US 20100010458 [0005, 0014]

Claims (6)

Gauze pad made of plastic gauze with mesh sizes of 51 microns to 200 microns, open area of 30 to 55%, thread count in warp and weft, but each independently if necessary from 30 / cm to 120 / cm, and yarn diameter in warp and weft, respectively but optionally independently from 30 microns to 300 microns characterized in that they have one or two adhesive edges of polyacrylate. Gauze pad made of plastic gauze with mesh sizes of 100 μm, open area 32%, thread count in warp and shot both 57 / cm yarn diameter in warp and weft both 77 microns, characterized in that they have one or two adhesive edges made of polyacrylate. Gauze pad made of plastic gauze with mesh sizes of 100 μm, open area 32%, thread count in warp and shot both 57 / cm yarn diameter in warp and weft both 77 microns, characterized in that they have two adhesive edges (one above, one below) made of polyacrylate. Gauze pad according to claim 1, 2 or 3, characterized in that it thermally at 90-130 ° C. dry, or hydrothermal at 100-190 ° C in water vapor pretreated before application to increase the bond strength. Gauze pad according to claim 1, 2, 3 or 4, characterized in that the adhesive edge by a protective film made of polyethylene or polypropylene, preferably polypropylene covered becomes. Gauze pad according to claims 1 to 5 characterized in that it is used to cover wounds being subjected to larval therapy.