JPH02224768A - Organism inside/outside communicating member - Google Patents

Abstract

PURPOSE:To obtain a communicating member which is lightweight and easy to machine and rarely causes rejection symptoms by coating and integrating all or part of the outer face of the plastic communicating member with an organism-affinitive ceramic layer. CONSTITUTION:Ceramic 2 and/or metal is processed by spattering or flame coating to completely and uniformly coat a plastic portion on the whole exposed surface or the necessary portion of the surface of a plastic communicating member 1 molded or machined into the necessary shape in advance, and the pre-processing to assist the sticking of a film is performed on the surface of the plastic so that this coated metal and/or ceramic is not easily peeled off from a plastic main body. Either ceramic such as alumina, bio-glass, sapphire zirconia, and apatite and/or organism-affinitive metal such as stainless steel, cobalt-chrome alloy, titanium, and tantalum is preferable for a coating material.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a communication member for communicating between the outside and the inside of a living body. More specifically, it relates to a communication member made of brass.

(Prior art 1. Problems to be solved by the invention) Recently,
The need for communication between the internal and external organs of living organisms such as the human body has rapidly increased with the advancement of medical technology.
It has become necessary to replenish blood, nutrients, etc., or inject disinfectants, cleaning agents, etc., temporarily or for a long period of time. Furthermore, if the ability to store or excrete urine or feces is lost, the fluid is removed through a plastic tube or catheter inserted into the abdomen and introduced into an artificial bladder, an artificial anus, etc. placed outside the body to maintain biological functions. This also began to be done. Also.

It is increasingly necessary to inject drugs into the bone marrow or deep into the muscles, or to inject or drain cleaning agents or disinfectants from outside the body for purposes such as cleaning and disinfection.

In such cases, to communicate between the inside and outside of the patient's body,
When the esophagus, trachea, intestines, etc. are not used, it is necessary to surgically incise a part of the body and insert or install a conduit such as the tube to the necessary site each time it is necessary, which causes a great deal of damage to the patient. Not only did this cause pain, but appropriate emergency treatment was extremely difficult and there were many problems.

Furthermore, even when a plastic tube is permanently placed through the esophagus or trachea to supply liquid food or air, the tube does not mix well with the living body.

There are also problems in that gaps may be created between them, inviting the intrusion of bacteria, and furthermore, sagging and ulcers are likely to occur due to rejection by living organisms.

For this reason, a communication member is installed and attached to the necessary location on the surface of the living body to temporarily pass through and hold the plastic tube, which is used as a transport tube that is inserted into the body from outside the body by cutting a part of the living body open. 5. Drugs, blood, and nutrients are transferred from outside the body into the body either directly or continuously.

It is known that other supply and/or discharge can be carried out simply and hygienically, and as such a communication member, a material that is compatible with the living body and has little rejection reaction.
They are made using ceramics such as alumina, sapphire, zirconia, and calcium phosphate.

Although these known communication members were fully satisfactory for their original purpose, because the material of the member was a special ceramic, they had the disadvantages of high specific gravity, poor workability, high cost, and easy breakage. was there.

On the other hand, plastics, which have recently become frequently used as medical materials, are lightweight and easy to process, but many have low or no biocompatibility, making it difficult to bring them into direct contact with living organisms.

The present inventor conducted various studies and trial production regarding these points, and as a result, completed the following invention.

(Means for solving the problem) That is, the main body of the communication member is formed by molding plastic into the required shape, the plastic is not exposed in the part that comes into contact with the living body, and the body is highly biocompatible. We investigated this coating method, noting that if we could coat it with a substance that does not cause rejection reactions and integrate it with the plastic of the main body, we could take advantage of the many characteristics of plastic.

Conventionally, methods for forming thin metal coatings include electrolytic and chemical plating, vacuum evaporation, sputtering, and metal spraying, but recently, techniques for forming coatings on ceramics by sputtering and thermal spraying have been completed.

Therefore, ceramics and/or metals may be applied to the entire exposed surface or a portion of the required surface of the plastic communication member, which has been preformed or machined into the required shape, by methods such as sputtering or thermal spraying as described above. , before processing the plastic part so that it is completely and uniformly coated, and also to help the coating adhere to the surface of the plastic so that this coated metal and/or ceramic does not easily peel off from the plastic body. processed.

The materials used for the main body of this communication member include polyamide, polycarbonate, acrylic resin, and others.

polyethylene, polypropylene, polystyrene.

It may be one or a combination of thermoplastic resins such as polyvinyl chloride, ABS, and fluorine resins, and thermosetting resins such as silicone resins, epoxy resins, phenol resins, melamine resins, and polyester resins. ,
Coating materials include ceramics such as alumina, bioglass, sapphire zirconia, and apatite, and/or stainless steel, cobalt-chromium alloys, titanium,
Any biocompatible metal such as tantalum is preferred.

(Example) The diameter of the upper flange part of chestnut 11 is 8 m11. The diameter of the lower flange is 161. A communication member with a length of 5.5 cm and a columnar body having a hole with an inner diameter of 2.41 mm was injection molded with polycarbonate, and the entire surface of this molded product, excluding the hole, was cleaned and roughened, and then treated with hydroxyl. Apatite fine powder (particle size 1001m)
, specific gravity 3.2) in an argon atmosphere using a magnetron type sputtering device.

A communicating member as shown in FIG. 1 was obtained by coating to a thickness of 3ONm+ under a 5.6XIO-')-hole.

Mourning-Example 1 ■ A communicating part with the same shape as Example ■ was injection molded using polyether sulfone (PE54100G manufactured by Mitsui Toatsu Chemical ■), and the surface was roughened in the same manner as Example ■. Aluminum was vacuum deposited to a thickness of 150 μI. Hydroxyapatite fine powder (flow diameter 100#m) is added to this molded product.
, specific gravity 3.2) was sprayed with argon and
A hydrogen plasma flame was generated and a multi-step thermal spraying process was carried out to obtain a thickness of about 150 μm to obtain a communication member as shown in FIG.

Communication members made of these materials are lightweight.

It has the advantages of being strong, highly biocompatible, less susceptible to biological rejection, available in a variety of shapes, inexpensive, and easy to perform additional processing.

The present invention further provides that the communication member has a fixing hole.

The communication member is located on the lower flange of the body insertion part and does not move or sneak in during use.

It is tilted to prevent bacteria from approaching and entering from the outside.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an in-vivo communication member based on the present invention, in which the entire surface of the plastic molded product except for the holes is coated with ceramics. The second country is the outer and lower part of the columnar part of the plastic molded product.
Only one side of the lunge part is coated with ceramics.
FIG. 2 is a cross-sectional view of an in-vivo communication member according to the present invention. FIG. 3 is a sectional view of the in-vivo communication member according to the present invention, in which a metal plate is mounted between the ceramic coating layer and the plastic body of the communication member shown in FIG. 4A and 4B are a sectional view and a bottom view showing three through holes provided in the lower flange portion of the communication member shown in FIG. 2. FIG. In the accompanying drawings. l...Plastic body, 2...Ceramic layer. 3... Metal plate layer, 4... Upper 7 flange portion 5... Lower 7 lange portion, 6... Column shaped portion, 7...
・Through hole. The purity of the drawing? (No change in content) Figure 1 Figure 2 Figure 3 Figure 4A Figure 4B

Claims (5)

[Claims] (1) A hollow columnar biological communication member having flanges at both upper and lower ends, the communication member being made of plastic, and all or part of the exposed outer surface of the communication member being made of biocompatible ceramics. A communication member inside and outside a living body, characterized in that it is covered and integrated with a layer made of the same material. (2) The communicating member according to claim 1, wherein the exposed outer surface of the communicating member, the outer surface of the columnar part, and the upper surface of the lower flange part are a layer made of the biocompatible ceramic. A communication member inside and outside a living body, characterized in that it is coated and integrated with. (3) The communicating member according to claim 2, characterized in that a metal plate is further integrated and inserted between the ceramic layer of the communicating member and the communicating member. Communication member. (4) The communication member according to any one of claims 1 to 3, wherein the lower flange portion has at least one through hole. Communication member. (5) The communication member according to claim 3, wherein the metal plate is made of one material selected from the group consisting of stainless steel, cobalt-chromium alloy, or titanium alloy. Features: A communication member inside and outside the body.