CZ2005600A3 - Medical material with activated carbon - Google Patents

Abstract

The activated carbon medical material consists of a carrier layer (1) formed as a multi-layered viscose and polypropylene, a layer (2) with activated carbon, and a further structured structure-shaped layer (3) arranged between the two layers. all three layers form a compact unit coupled with heat treatment or bonding or blending or pressure without the use of other fasteners. Medical material is compact, with a stable layer of active carbon, flexible in handling, it can be created in a velmity layer and is robust. This material allows the addition of various additives to the treatment and, thanks to the inserted scaffold 3, the fibers from the carrier layer 1 are not released into the active carbon layer 2.

Description

Medical bandage-activated carbon material

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to active carbon medical material for treating wounds.

BACKGROUND OF THE INVENTION

For the treatment of festering and poorly healing wounds, a carbon-containing dressing material with its, especially sorption properties, is very suitable.

Activated carbon is known to absorb odors, neutralize the unpleasant odors of infected and contaminated wounds. Activated carbon also has the ability to bind bacteria.

A multi-layer dressing material is known on the market. For example, a dressing material consisting of a liner protecting layer, a cellulosic layer, a viscose fiber layer with compressed activated carbon and a special wound. However, the active absorbent layer, of compressed carbon dioxide, does not come into direct contact with the surface to be treated and is therefore not as effective. The lip that is applied to the wound sticks to it, which hinders wound healing.

Further, a dressing material of a similar layered arrangement with activated carbon saturated with silver salt is known. The purpose of the dressing is to collect the secretion from the open wound to the pulp, and the silver salt in the carbon layer is intended to help dispose of the microbes in the collected secretion. In this case too, the carbon layer is arranged on a substrate which is covered by another layer. The wound is not directly applied to the carbon layer, so this dressing material is not as effective. This dressing material also adheres to the wound, which does not contribute to wound healing.

For all of the above dressing materials, the activated carbon or carbon grains are enclosed in the package, thereby reducing the therapeutic efficacy.

The solution according to CZ PV 2003-916 created a carbon layer dressing material controlled in conjunction with a layer of carrier, stabilizing material of health-friendly material, and the new solution of joining both materials was resolved so that the new material can be applied directly with the carbon layer directly to the wound. higher effectiveness of wound healing. The carbon layer is stable on the new substrate and the dressing material is flexible for the necessary handling. The carrier layer was formed from a defined ratio of viscose fiber to polypropylene compared to the prior art solutions.

The carbon fiber fabric is not toxic, does not cause adverse reactions, is breathable and hydrophilic.

The carbon fabric does not contain any other foreign substances that could have an irritating effect or reduce absorption.

The construction and mechanical properties of the dressing material according to the invention allow direct, immediate contact of the carbon fabric layer with the wound base where it effectively absorbs.

The active carbon layer is produced by the controlled carbonization of the cellulose hydrate followed by activation at high temperatures in a controlled atmosphere. The result of thermal treatment is pure activated carbon with an important microporous structure, which results in a high sorption effect for organic substances.

In long-term testing of the active carbon fiber dressing material according to CZ PV 2003-916, some types of wounds revealed that, exceptionally, viscose fibers were released from the carrier layer and permeated through the carbon layer. Although penetration of viscose fiber into body tissues has not yet been reported, there is a theoretical possibility of penetration of a single viscose fiber into the microcapillary system of the body.

SUMMARY OF THE INVENTION

The above-mentioned possible shortcomings are overcome by a new solution of active carbon medical material that includes a carrier layer and an activated carbon layer, but consists essentially of:

a carrier layer formed by joining several layers of viscose and polypropylene, for example by calendering, wherein the min. 80% of polypropylene as a binding material is on the outside of the backing layer and min. 80% viscose inside. The cross-section of the fibers of the backing layer may be circular or other geometric in shape, with a cross-section having as many parabolic edges as possible to increase the perimeter of the fiber, for example a multilobular star, from an activated carbon layer. a woven or nonwoven carbon fabric, between which the two layers are arranged in the form of a lattice with a controlled structure formed of an antibacterial material, for example polyester, the mesh of the grid may be made of a variety of different types.

9 »9 9 9 9 91 □» 99999 »999 geometric shapes such as circle, triangle, square, trapezoid and the like. The thickness of the fibers from which the grid is formed is not specifically defined, the highest effect being achieved by a grid made of fibers of a thickness of 0.2 mm. Placing a grid between the two layers creates space for creating a microclimate above the wound. All three layers form a compact whole joined by, for example, heat treatment or gluing or a mixed method and the like, or the connection can only be made by pressure, the grid adheres to both layers.

By providing the active carbon medical material according to the invention, in particular by inserting a grid between the carrier layer, which is preferably multilayered and the active carbon layer occurs:

- to consolidate the entire complete material while maintaining the necessary flexibility in handling

- to increase the suction capacity of the backing layer into the suction layer, which can be applied from above to the backing layer of this active carbon medical material, the active carbon layer is applied to the wound

- to improve the microclimate above the wound with the possibility of dosing of additives or medicaments, the grid serves as a carrier of additives supporting the wound healing

- to prevent fibers from escaping from the carrier layer into the active carbon layer

The active carbon medical material of the invention is compact, stable, resilient in handling, can be formed in a very thin layer without losing its effects, is breathable, and allows for the addition of various therapeutic ingredients.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in greater detail in the accompanying drawings, in which: Figure 1 shows an active carbon medical material as seen from the raised corner of the carrier layer so that all three layers are visible. Fig. 2 shows a layer of active carbon fibers on which a grid with trapezoidal openings is arranged, and Fig. 3 shows the structure of the medical material in cross-section.

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DETAILED DESCRIPTION OF THE INVENTION

The active carbon medical material, in the exemplary embodiment illustrated in Figures 1 to 4 in the accompanying drawings, consists of a carrier layer 1 that is made by combining several layers of viscose and polypropylene by calendering, such that min. 80% of polypropylene as bound material is in the outer planes of the backing layer 1 and min. 80% of the viscose in the middle, wherein the cross-section of the fibers of the carrier layer 1 is a circle, further consists of a layer 2 consisting of a carbon fiber fabric, and between the two layers a further polyester grid layer 3 is arranged. in the form of an almost isosceles trapezoid, the parallel sides of which are 2 mm and 8 mm long and the non-parallel sides are each 7 mm long and the fiber thickness of the grid 3 is 01.2 mm. The accuracy of the dimensions is given by the production possibilities. All three layers 1, 2 and 3 together form a compact unit joined by heat treatment, the grid 3 forming the connecting element between the two layers 1 and 2. If an adhesive material is used for the bonding, it is suitable to apply it from both sides to the grid 3, which is attached to both layers 1 and 2 and thus no glue is present in the mesh area of the grid 3. If the backing layer 1 is made of a non-woven viscose and polypropylene fabric, for example by a puncture method, the grid 3 adheres to the backing layer 1 without additional bonding material.

The resulting material is very efficient, compact, flexible and easy to handle. The wound is applied directly by the layer 2, i.e. the fabric with active carbon fibers. Due to the multilayer design of the carrier layer 1, the suction ability of the carrier layer 1 into the suction material is applied to the suction material which is applied from above to the carrier layer 1. The moisture permeability direction 5 extends from layer 2 to layer 1, thereby increasing the efficiency of the medical material. By inserting a grid 3 between the two layers 1 and 2, a space 4 is created, thereby improving the microclimate above the wound, and in addition the grid 3 can be used as a carrier of wound healing adjuvants. Inserting the grid 3 of the medical material does not release the fibers from the carrier layer I into the activated carbon layer 2.

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Industrial applicability

The dressing material according to the invention is widely used in the medical field. It can be used for non-healing wounds of primary and secondary infection, open infected tumor defects in dermatology for leg ulcers, ulcer complications on skin and diabetes mellitus, burns, surgery and postoperative wounds and the like. Very advantageous use is in the treatment of superficial bleeding, in simple and complex surgical procedures and in many medical fields, but also in various lay applications.

Claims (6)

PATENT CLAIMS An active carbon medical material comprising a carrier layer and an active carbon layer, characterized in that it consists of a carrier layer (1) formed of viscose and polypropylene, an active carbon layer (2), between the two By means of the layers, a further sheet-like layer (3) with a controlled structure is arranged and all three layers form a compact whole joined by heat treatment or gluing or by a mixed method or by pressure without additional fastening material. The active carbon medical material according to claim 1, characterized in that the carrier layer (1) is formed as a multilayer. 3. The active carbon medical material of claims 1 and 2, wherein the carrier layer (1) is formed from at least three layers of viscose and polypropylene, for example by calendering, wherein most of the polypropylene as a bonded material is contained. in the outer sides of the backing layer (1) and as little viscose as possible is contained in the inner backing layer (1). Active carbon medical material according to claim 1, 2 and 3, characterized in that the fibers of the carrier layer (1) are of circular or any other geometric shape or even of star shape with at least two lobes. . The active carbon medical material of claim 1, wherein the activated carbon layer 121 is formed as a woven or nonwoven carbon fabric. The active carbon medical material according to claim 1, characterized in that the grid (3) is formed with meshes in the form of various geometrical shapes, for example in the form of a circle, triangle, square, trapezoidal etc.