JPH0610980Y2 - Bedsore prevention mat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a decubitus prevention mat for use in the prevention or treatment of decubitus by distributing locally applied weight.

[Conventional technology]

Blood circulation deteriorates when sleeping or sitting in the same posture for a long time due to spinal cord injury, cervical stack injury, brain disease, long-term medical treatment, or long-term surgery. Concentration on the subject causes severe blood circulation, resulting in pressure sores. A pressure sore is a necrosis of a tissue that is caused by ischemic changes due to compression for a long time, that is, a pressure necrosis. Generally, the internal pressure of a capillary tube is around 25 mmHg, and if an external pressure higher than this value is applied, circulatory disturbance is easily caused. is there. For example, in the sitting position, a pressure of about 300 mmHg / cm ² is applied to the buttocks. If the compression time is short, the ischemic changes in the tissue do not recover and lead to necrosis, but a pressure sore is formed after a long time (there are some differences depending on the age and the state of the disease).

One of the methods for preventing or treating this pressure ulcer is a pressure-dispersing pressure ulcer device that disperses body pressure and prevents circulatory disorders. Conventionally, as the body pressure dispersion type decubitus device, polyurethane, latex rubber, foam made of polyvinyl chloride, etc., futon filled with fibers of cotton, acrylic, polyester, etc., polyvinyl chloride, polyethylene, polyvinyl acetate , Air mat or water mat in which air or water is enclosed in a bag made of natural rubber, CMC, sodium alkyne acid, natural polysaccharide, synthetic water-absorbing polymer, etc. are fluidized with water or solvent, and this is polyvinyl chloride, polyethylene , Mats enclosed in bags made of polyvinyl acetate, polyurethane, latex rubber, etc., and gels of silicone, polyurethane, acrylic acid ester, fatty acid ester, etc., with polyurethane film, polyvinyl acetate, soft polyvinyl chloride,
There are gel-like mats covered with synthetic or natural rubber.

However, such a decubitus device still does not sufficiently satisfy the requirements for body pressure dispersibility, durability, and operability.

[Problems to be solved by the device]

Among the above-mentioned decubitus tools, mats using gels have a higher body pressure dispersion effect, superior positional stability and durability compared to other mats, but on the other hand they are heavy and can be carried and set. However, there is a problem in durability because the gel body separates during use and does not exhibit the initial body pressure dispersion effect, and there is a problem in durability. The separation of the gel body can be prevented by increasing the cross-linking density of the gel body, but if the cross-linking density is increased, the flexibility, which is a characteristic of the gel body, is lost and the body pressure dispersion effect is also reduced. The present invention is intended to solve these drawbacks of a mat using a gel body, to eliminate the separation of gel without lowering the body pressure dispersibility, and to obtain a pressure sore prevention mat that can be made lightweight. is there.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the present invention, a sufficient amount of air bubbles are contained in a cross-linked gel body to reduce the specific gravity of the gel body itself by 5 to 30%, and the gel body containing the air bubbles is made into an elastomer. It is formed by coating with a film.

[Action]

In the present invention, the gel body is not cross-linked due to the cross-linking of the gel body, and is added to the mat due to the inherent pressure dispersion ability of the gel body and the buffering effect of the air bubbles enclosed in the gel body. Body pressure is dispersed, and this dispersion characteristic is retained for a long time. Further, the specific gravity of the gel body in which air bubbles are contained is 5 to 30% lower than the specific gravity of the gel body itself, and the weight of the mat becomes smaller, and the gel body is covered with an elastomer film, so that the surface of the gel body is also matted. It conforms well to the body pressure applied to and deforms to contribute to the pressure dispersion effect.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention, in which 1 is a rectangular parallelepiped gel body, 2 is a cover material that covers the entire surface, and a part of which is cut away in the figure, and 3 is a cover material. Is the seal part.

FIG. 2 is a sectional view of another embodiment, 4 is a rectangular parallelepiped gel body, 5 is a foam body laminated thereon, 6 is a cover material for covering both the gel body 4 and the foam body 5.

In the above-mentioned examples, the gel body, the main component is polyacrylic acid alkyl ester and the alkyl group is methyl, ethyl,
Butyl, 2-ethylhexyl and isobutyl are preferred, and butyl, 2-ethylhexyl and isobutyl are preferred, and polyurethane, polyvinylpyrrolidone, polyacrylate, polydimethylsiloxane, polyvinylether and the like are also available.

Specifically, the polyacrylic acid alkyl ester is
4-toluene diisocyanate, 2-6-toluene diisocyanate, paraphenylene diisocyanate, 2-
It can be obtained by crosslinking with a diisocyanate catalyst such as chloro-1,4 phenyl diisocyanate, hexamethylene diisocyanate, 4,4'-diphenyl diisocyanate or by irradiating an electron beam of a polyacrylic acid alkyl ester for crosslinking.

The thickness of the gel body is 10 to 100 mm, preferably 20 to 30
mm is suitable.

The foam may be a urethane foam, a natural rubber foam, a neoprene foam, a chlorinated rubber foam, a polyvinyl chloride foam or the like which is usually used for a cushion material. The thickness does not need to be particularly thick because it prevents the temperature of the gel body from being directly transmitted to the affected area and protects the gel body. 5 to 50 mm is sufficient, preferably 1
Around 0 mm is good.

As the cover material, an elastomer film, for example, a urethane film, soft polyvinyl chloride, polyvinyl acetate, chlorinated rubber, natural rubber, synthetic rubber or the like can be used and has a thickness of 30 to 300 μm, preferably 50 to 100.
μm is good.

The method for producing the gel body of the present invention includes forcing a polymer component and a cross-linking agent into a mold, then pouring the mixture into a mold, heat-crosslinking the film, and then treating with a film cover. Pour into a mold,
There is a method in which a film cover is treated after crosslinking.

According to the specific production method, a step in which polycaprolactone and phthalic acid ester are mixed with a prepolymer composed of polypropylene glycol and hexamethylene diisocyanate while blowing nitrogen gas with a high rotation mixer, and nitrogen gas is sufficiently dispersed After adding a small amount of pentamethyldiethylene, triamine, silicon, etc., pour into a mold and put in an oven to crosslink to form a gel.
The gel body is wrapped with a urethane film, sealed with a welder, the urethane foam is overlaid on one side, and the whole is covered with a cloth to obtain a pressure sore mat.

According to another method, a small amount of sodium bicarbonate is added to butyl acrylate and sufficiently mixed, and then a small amount of 4,4'-diphenylmethane diisocyanate is further added, and the mixture is poured into a mold, electron beam cross-linked, and then oven-baked. Heat to form a gel.

The cross-linking density of the gel body is preferably such a value that the gel body does not separate even if it is used for a long period of time under pressure, and the bubbles trapped in the gel body have a specific gravity of 5 to 30%,
Preferably, the amount should be reduced by about 10%. If the specific gravity reduction amount of the gel body is less than 5%, there is no practical effect in reducing the weight of the mat, and if it is more than 30%, the strength of the gel body becomes low, and durability becomes a problem.

[Conventional effect]

According to the present invention, since the flexibility of the gel body as a whole is increased by the air bubbles enclosed in the gel body, it is possible to increase the crosslink density of the gel body itself when the gel body has the same flexibility.
As a result, the gel body is not separated, the shape of the gel body is not lost, and a good body pressure dispersion effect can be obtained. Further, a part of the gel body having a specific gravity of about 1 or more is replaced with air bubbles. The weight of the mat is reduced and the operability of the mat is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a sectional view of a different embodiment of the present invention. 1 …… Gel body 2 …… Cover material 4 …… Gel body 5 …… Foam body 6 …… Cover material

Claims (1)

[Scope of utility model registration request] 1. Encapsulating air bubbles in an amount sufficient to reduce the specific gravity of the gel itself by 5 to 30% during formation of a crosslinked gel.
A decubitus prevention mat, which is formed by coating the gel body enclosing the air bubbles with an elastomer film.