JPH0143078Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention is used as surgical medical auxiliary materials used in surgical medicine, etc. More specifically, it is used as casts for fractures, casts for correction of limbs or fingers, splints, etc. It is related to surgical medical auxiliary materials that can be used.

[Background of the idea]

BACKGROUND ART Conventionally, plaster of paris casts have been mainly used as auxiliary surgical materials used in surgery, particularly in orthopedics, for the treatment of fractures and the correction of limbs.

Plaster of Paris casts are made by mixing water with a mixture of plaster of paris and melamine/formaldehyde resin, and applying this semi-fluid material to bandaged limbs and allowing it to harden.

In such calcined plaster casts, calcined plaster is mixed with water, but this condition gives an extremely dirty feeling, and furthermore, it takes time and effort to knead the calcined plaster, and the amount of water added is limited. The disadvantage is that it requires some skill in control.
Also, when applied to the skin, it causes discomfort to the skin regardless of whether it is covered with a bandage or not.
It takes time for the mold to harden, the patient is forced to remain quiet during this time, and dust is generated during demolding, which takes time and effort.

In addition, when applied to the skin, it has disadvantages such as staining clothes and irritating the skin, and after curing, it is heavy, does not transmit X-rays, and is not easily soaked in hot water during bathing. There were various drawbacks such as not allowing contact.

[Summary of the idea]

This invention was made in view of the above points,
Casts, bandages, etc. that can be easily and effortlessly applied to the affected area without any physical effort, are aesthetically pleasing, do not irritate the skin when applied, and are easily removable. The purpose of the present invention is to provide a surgical medical auxiliary material that can be used as an auxiliary surgical material, and furthermore, to provide a surgical medical auxiliary material that can be attached directly to an affected area without wrapping a bandage.

Therefore, the surgical medical auxiliary material according to the present invention has synthetic trans-1,4 polyisoprene on one side of the cloth body.
It is characterized by forming a compound layer containing 5 to 70 parts by weight of a polymer or polyester resin obtained by graft polymerizing vinyl chloride to an ethylene vinyl acetate copolymer per 100 parts by weight.

[Specific explanation of the idea]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a sectional view showing the surgical treatment auxiliary material according to the present invention. In the figure, 1 is a cloth body, 2 is a synthetic trans-1,4 polyisoprene (100 parts by weight), ethylene vinyl acetate copolymer and vinyl chloride. Polymer or polyester resin obtained by graft polymerization of 5 to 70
The formulation layer includes parts by weight.

As is clear from FIG. 1, the surgical treatment auxiliary material of the present invention is made by graft polymerizing vinyl chloride to ethylene vinyl acetate copolymer to 100 parts by weight of synthetic trans 1,4 polyisoprene on one side of cloth body 1. A compound layer 2 containing 5 to 70 parts by weight of a polymer or polyester resin made by the above process was formed.

Such cloth body 1 is not particularly limited in the present invention, and for example, nonwoven fabric, woven fabric, knitted fabric, etc. can be effectively used. Further, the material of the cloth body is not particularly limited either. For example, a cloth body made of natural fibers such as cotton cloth or pure blanket, or a cloth body made of synthetic fibers such as nylon can be used.

The compound layer formed on the cloth body 1 as described above is
Synthetic trans-1,4 polyisoprene as described above
It consists of a blend containing 5 to 70 parts by weight of a polymer or polyester resin obtained by graft polymerizing vinyl chloride to an ethylene vinyl acetate copolymer per 100 parts by weight, and this blend is heated at a temperature of 60 to 100°C. It is a compound that plastically deforms at temperatures below 60°C and hardens at temperatures below 60°C, and has the advantage of curing in a short time and not irritating the skin. Furthermore, it has the advantage of being able to transmit X-rays and take X-rays from above the surgical medical auxiliary material to determine the condition of the bone in the affected area. Moreover, direct contact with the skin does not cause discomfort.

Although this synthetic trans-1,4 polyisoprene is mostly crystalline and has a softening point of around 55°C, it cannot be used as it is as an auxiliary surgical material as described above.

Therefore, by adding a polymer obtained by grafting vinyl chloride to an ethylene-vinyl acetate copolymer or a polyester resin to such synthetic trans-1,4 polyisoprene, the softening point of the composition can be adjusted to a surgical level. The composition is suitable for use as an auxiliary material, does not reduce its rigidity at room temperature, does not stick to the hands when heated and softened, has good workability, and can be freely molded.

The amount of the ethylene-vinyl acetate copolymer graft-polymerized with vinyl chloride or the polyester resin is 5 to 70 parts by weight per 100 parts by weight of the synthetic trans 1,4 polyisoprene.

In particular, when using a polymer obtained by graft polymerizing vinyl chloride onto an ethylene-vinyl acetate copolymer, it is preferably added in an amount of 5 to 50 parts by weight, and when a polyester resin is added, it is preferably added in an amount of 20 to 70 parts by weight. . When adding a polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer, the amount of the polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer is less than 5 parts by weight. After softening,
It takes a long time to cure at room temperature and is too self-adhesive, significantly reducing workability.
If more than 1 part by weight is added, the curing time becomes too fast to be practical.

Furthermore, when adding a polyester resin, if the polyester resin is less than 20 parts by weight, it will harden too quickly, impairing workability;
This is because if more than 70 parts by weight is added, the curing time becomes too slow to be practical.

As is clear from the above description, when adding a polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer, it can be used particularly as a relatively thick surgical medical accessory material such as a plaster cast. The polyester resin is used when the composition is used as a replacement for a relatively thin surgical medical material, such as a bandage, and the curing time is accelerated when the polyester resin is added. In consideration of work efficiency, the curing process is delayed and the curing process is performed within a predetermined curing time.

As the above-mentioned polyester resin, it is preferable to use a resin made into a polyester by ring-opening polymerization of a lactone (eg, ε-caprolactone) monomer, which is an intramolecular ester. The reason for this is that the melting point
This is because it is a thermoplastic resin with a temperature of 60° C. or lower and a relatively slow crystallization rate, and by using it in combination with trans 1,4 polyisoprene, it becomes possible to freely control plasticization and curing.

The molecular weight of such polyester resin is preferably from 10,000 to 100,000. If the molecular weight is less than 10,000, it is too sensitive to heat and temperature, and there is a risk of rapid softening and decreased viscosity, resulting in poor workability.If the molecular weight exceeds 100,000, crystals may This is because the curing speed is very slow and it takes too much time to cure, resulting in a risk of poor workability.

When using the surgical medical auxiliary material as described above, first, the surgical medical auxiliary material according to the present invention as described above is cut using scissors, a cutter, etc. according to the size of the affected area, etc. It is heated with hot water of 60 to 100° C. or a hair dryer to a temperature at which the compound layer 2 is plastically deformed. At such a temperature that the compound layer 2 is plastically deformed, the cloth body 1 is attached to the affected area by winding or the like so as to be in contact with the affected area, and is then hardened.

When demolding, the compound layer 2 is heated to be plastically deformed, and the surgical medical auxiliary material is removed, contrary to the case of attachment described above.

[Effect of idea]

As explained above, according to the surgical medical auxiliary material of the present invention, since it has a compound layer and a fabric layer, it does not require the time and effort of kneading, applying, or wrapping a bandage around the affected area as in the past. without requiring
It has the advantage of being thermoplastic and can be easily attached to surgical medical auxiliary materials by simply attaching it to the affected area, which is extremely advantageous in surgical treatment. Further, in order to correct the state of attachment of the affected part, it is only necessary to thermoplasticize the correction part and shape it, so there is an advantage that corrections that were previously impossible can be easily made.

Furthermore, the surgical medical auxiliary material according to the present invention has a plastic deformation temperature of 60 to 100°C, so it can be used even when bathing.
It is possible to immerse the device in a bathtub (approximately 40° C.) while wearing it, and since the compound layer is transparent to X-rays, it also has the advantage of allowing X-rays to be taken while wearing the surgical medical accessory.

In addition, the surgical medical auxiliary material of the present invention can be easily removed from the mold by thermoplastic deformation of the compound layer, and there is no risk of generating dust, etc., and there is no irritation to the skin, making it easy to put on. It has various practical advantages, such as not causing any discomfort during use.

In addition, according to the surgical medical auxiliary material according to the present invention,
After use, it can be used again and is also economical.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the surgical medical auxiliary material according to the present invention. 1... Cloth body, 2... Compound layer.

Claims (1)

[Scope of utility model registration request] On one side of the fabric, a compound layer containing 100 parts by weight of synthetic trans 1,4 polyisoprene and 5 to 70 parts by weight of a polymer or polyester resin obtained by graft polymerizing vinyl chloride to ethylene vinyl acetate copolymer is provided. Surgical medical auxiliary material characterized by being formed.