JPH06178801A - Absorber - Google Patents

Abstract

PURPOSE: To prevent an absorptive material from adhering to or remaining in a lesion by structuring the absorptive material which is designed to absorb an exudate from the lesion by applying in the vicinity of the lesion, from laces linking several small fragments of alginic acid or its salts. CONSTITUTION: The absorptive material to absorb the fluid from a lesion under treatment is composed of laces 2 linking together beads 1 of alignic acid or its salts. The absorptive material applied to the vicinity of the legion is to allow the beads 1 to absorb the exudate from the legion and expand themselves. This constitution resolves a problem with a conventional fibered absorptive material which is likely to stick to a lesion, remaining in there.

Description

Detailed Description of the Invention

The present invention relates to an absorbent body for absorbing fluids from healing wounds.

Various absorbers have been used to absorb liquids such as wound exudates, but they are often fibrous and therefore tend to adhere to and remain in the wound for some time.

Such difficulties are overcome by using the absorbent body of the present invention. The absorbent body contains a single thread along which a string of alginate bits are strung together. When applied around the wound, it can absorb wound exudate.

The pieces can take various forms.
For example, granules, pellets, spheres or beads in a special form, ie beads that are perforated so that they can be linked together. In general, a sliver is a discrete piece of thread that can be threaded and need not be regular in shape; its weight is usually less than 0.1 g.

Alginic acid or its salts (hereinafter referred to as "alginate") are extracted from seaweed and consist of linear polysaccharides, the monomer units of which are manuronic acid and guluronic acid. The alginate used is, for example, calcium alginate, ammonium alginate or mixtures thereof. Calcium alginate is particularly suitable and is made by the ion exchange reaction of sodium alginate with calcium chloride.

However, alginate is approximately 0.01
To 2.0 mm thick gel. Such gels introduce a suitable cation (eg calcium) into a solution of a water-soluble alginate, eg sodium alginate, controlled, preferably in the presence of a pH adjusting agent, eg gluconodeltalactone. Made conveniently by The alginate concentration is, for example, 2% to 20% by weight and the final cation concentration is 0.2%.
Suitably from 10 to 10% by weight. The resulting gel usually contains 30 to 99% by weight of water, if desired it is partially or completely dried, for example 15 to 50% by weight water content, more preferably 20 to 40% by weight water content. To

The preferred form of the present invention comprises a string of alginate beads arranged in a beaded fashion. The beads are swollen when the string of suitable length is placed near the wound and the exudate is absorbed by the beads.

In any case, it is preferred that the string containing the pieces be aseptically packaged. The string is a thin cord, thread, twine, fiber or similar material,
It may be a natural substance or a synthetic substance. Therefore, nylon thread may be used.

When the beads are scattered along the string, the diameter of the bead holes is such that the beads do not slide too freely along the string so that the beads are held at a distance. Preferably there is. A string with a fairly rough surface or a fairly rough twain,
It helps in this regard. If the beads are spaced apart, the average spacing is approximately equal to the diameter of the beads, eg about 3 mm.

If desired, the bead string is contained within an outer envelope of thin porous material. This jacket is preferably cylindrical and preferably contains almost the entire bead string.

The material of which the jacket is made must have a maximum thickness of 1 mm, more preferably less than 0.5 mm.

The envelope is preferably made from a film, ie having a thickness of less than 300 micrometers, for example 20 to 100 micrometers in thickness, more preferably 30 to 70 micrometers, for example about 60 micrometers. Made from suitable materials.

The pores of the envelope must be large enough to allow the entry of wound exudate. Typical holes have a side length of 0.5 to 1.00 mm, for example 0.8 mm.
Is a square.

The outer cover is a substance that hardly adheres to the wound,
That is, it consists essentially of a hydrophobic substance. Although a variety of plastic materials can be used, the preferred plastics are those composed of ethylene / methyl acrylate copolymers, preferably including low density polyethylene. One preferred form consists of 16% by weight ethylene / methyl acrylate copolymer, 83% by weight low density polyethylene and 1% processing additive.

Other suitable plastic materials include water impermeable polymers such as polyolefins. Polyethylene and polypropylene are representative of this group, but higher order olefin polymers, such as copolymers of two or more olefins, or copolymers of olefins with one or more monomers are also used.

Although fibrous plastic materials are not preferred due to the risk of partial adhesion to the wound, such materials are also present if the fibers are fully adhered to each other and there are no loose fibers. Can be used.

Examples of such fibrous materials that can be used are:
Polyolefins such as polyethylene, polypropylene and polybutylene homopolymers and copolymers, vinyl polymers such as polyvinyl chloride, polyamides such as nylon, and polyesters. Other fibers include rayon and acrylic fibers. Especially about 25
Polyester fibers having a relatively high melting point of 0 ° C. can be used.

In another embodiment, the alginate particles, such as alginate beads, contain active wound healing agents such as growth factors, collagen, glycosaminoglycans, vitamins, bactericides and enzyme debriders. be able to.

The advantage of the absorber of the present invention is that it is completely removed and that it is non-adhesive. Prior art absorbent bodies are fibrous and therefore tend to adhere and leave a small amount of fiber in the wound.

Referring to FIG. 1, alginate beads (1) having a diameter of about 3 mm are stringed together with a string (2) at intervals of about 4 mm.

Referring to FIG. 2, the bead string shown in FIG. 1 is placed in a porous cylinder (3) having holes (4). The cylinder is made from a plastic film consisting of ethylene / methyl acrylate copolymer and low density polyethylene, each jacket being perforated. The hole (4) is a square with a side length of about 2 mm.

When placed in contact with a wound, the lace beads shown in FIG. 1 or the contained lace beads shown in FIG. 2 absorb exudate and swell.

Next, an embodiment of the present invention will be described. (1) The absorbent body according to claim 1, wherein the alginate is calcium alginate. (2) The absorbent body according to claim 1 or the embodiment (1), wherein the small pieces are beads. (3) The absorbent body according to any one of (1) and (2), wherein the string is contained in an outer cover made of a thin porous material. (4) The absorbent article according to item (3), wherein the thin porous material comprises an ethylene / methyl acrylate copolymer and low density polyethylene. (5) The absorbent body according to the embodiment (3) or (4), wherein the thin porous material has a maximum thickness of 1 mm and hardly adheres to the wound. (6) The absorbent body according to item (5), wherein the material is a film. (7) A small piece of alginic acid or a salt thereof contains an active wound-healing agent and embodiments (1) to (6).
The absorber according to any one of the items.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

2 shows an improvement of the invention shown in FIG.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Peter John Stevens Beady, England 18 4 Hx, West Yorkshire, Shipley, Nab Wood, Nab Wood Crescent 42

Claims (1)

[Claims] 1. An absorbent body suitable for absorbing wound exudate, which comprises a string formed by connecting small pieces of alginic acid or a salt thereof in a daisy chain, and is suitable for being applied in the vicinity of a wound and absorbing the wound exudate. Absorber.