JP3028196U - Suction tube for medical aspirator - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] Each member has a simple shape and can be easily manufactured without special skill or skill, and can be easily washed and sterilized. (EN) A suction cylinder for a medical suction device, which exhibits sufficient durability and can avoid an accident due to damage of a member. A tubular body formed of a transparent member such as glass or a hard synthetic resin and having a substantially uniform diameter from a distal end opening on the living body contact side to a proximal end opening on the suction hose connection side. And a suction cylinder main body (2) that is made of thermoplastic elastomer and is integrally formed with the suction cylinder main body. A suction cylinder (1) is constituted by a tubular suction hose connecting member (33) having a communicating vent hole and an elastic cap (3) projecting outside the closed portion.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a structure of a medical suction device, and more particularly to a suction tube of the medical suction device.

[0002]

[Prior art]

 The medical aspirator has a suction hose connected to the decompression means and sucks the open end of a suction cylinder in close contact with the living body, and bulges the living body into the suction cylinder for necessary treatment. Is to do. As shown in FIG. 5, the suction cylinder 51 is formed of a transparent member such as glass or a synthetic resin molded product so that the state of the living body 50 to be suctioned can be observed from the outside. The portion 54 connected to the connecting portion 52 for connecting the suction hose 53 on the side has a throttle shape.

A negative pressure of at least 70 kPa and a maximum of about 25 kPa acts on the suction cylinder 51 when the medical suction device is operated, and therefore the suction cylinder 51 must be designed to have sufficient strength to withstand the negative pressure. I have to. In particular, in order to withstand the harsh conditions of use that the suction cylinder 51 faces in the medical field, the glass suction cylinder not only examines the glass material, but also finishes the suction cylinder with a uniform thickness and further draws it, and suction hose. In order to form the connecting portion 52, it is necessary to have skill in blowing and connecting work, and it is also necessary to sufficiently remove the strain of the formed suction cylinder.

On the other hand, in the case of a synthetic resin molded product, it is processed under high pressure and high temperature and then cooled to form a cylinder. However, the outer shape of the diameter narrowing portion 54 of the suction cylinder and the suction hose connecting portion 52 conforms to the mold. Although it is accurate, internal distortion is difficult to remove.

Moreover, the suction efficiency of the suction cylinder 51 is governed by the inner diameter of the suction hose 53. However, an excessively thick hose is inconvenient to handle due to the limited capacity of the suction device, and a hose with a small inner diameter is usually used. In order to successfully connect the suction cylinder 51 and the suction hose 53 to each other, it is necessary to squeeze the proximal end side of the suction cylinder 51 to form a thin suction hose connection portion 52 and to fit each other. In particular, the stress concentration is likely to occur especially on the mounting portion 55 of the suction hose connecting portion 52.

Therefore, due to the above manufacturing problems, when the suction device is actually assembled in the medical field, the suction hose connection portion 52 is chipped or cracked, and the suction cylinder 51 during the suction operation is performed. If the cracks occur, the suction cylinder 51 itself cannot be used, and it may have a great influence on the living body.

Originally, since the suction cylinder 51 is relatively expensive as a component, it cannot be disposed of and reused for cleaning and sterilization, but the proximal end side of the suction cylinder 51 is narrowed and the inner diameter of the suction hose connecting portion 52 is small. Therefore, there is a drawback that it is difficult to clean this part.

[0008]

[Problems to be solved by the device]

 The inventor has made extensive studies to solve these drawbacks and defects found in the conventional suction cylinder, and as a result, the suction cylinder has a suction hose connecting member prepared separately without reducing the diameter of the suction hose connecting end side. With the structure in which the elastic cap that has been formed is fitted on the suction cylinder body from the outside, all the above-mentioned drawbacks and defects can be solved satisfactorily, and operation is extremely simple and completely safe to use. I found it possible.

That is, according to the present invention, the shape of each member is simplified and can be easily manufactured without any special skill or skill, and can be easily washed and sterilized. The purpose of the invention is to obtain a suction cylinder of a medical suction device that exhibits sufficient durability even under operating conditions and can avoid accidents due to breakage of members.

[0010]

[Means for Solving the Problems]

 A suction unit that is made of a transparent material such as glass or hard synthetic resin and forms a cylindrical body with a diameter that is almost uniform from the front end opening on the living body contact side to the base end opening on the suction hose connection side. It is integrally formed with the barrel main body with a thermoplastic elastomer, and is detachably fitted into the base end opening of the suction barrel main body, and when the base end opening is closed, it is connected to the inside of the suction barrel main body. A tubular suction hose connecting member having pores and an elastic cap projecting outside the closed portion constitute a suction tube of a medical suction device.

[0011]

[Embodiment of device]

 Embodiments of the present invention will be described with reference to the drawings.

1 to 3 show a typical embodiment of a suction cylinder of a medical suction device of the present invention, in which the suction cylinder 1 includes a suction cylinder body 2 and an elastic cap 3. It is composed of two parts, and 4 is a suction hose, which is connected to a main body of a suction device (not shown).

The suction cylinder main body 2 is formed of a transparent member such as glass or hard synthetic resin, and has a total length from a front end opening 21 that is in contact with a living body to a base end opening 22 into which the elastic cap 3 is fitted. It has a cylindrical shape with a uniform diameter. In the illustrated example, the distal end opening portion 21 is subjected to helix processing considering that it is a portion that comes into contact with a living body, but it may be a simple straight shape. However, in that case, it is preferable to chamfer the ends. The base end opening 22 has a straight shape in the example shown in FIGS. 2 and 3, but as shown in FIG. 4 (a), it may be subjected to helix machining 22a as shown in FIG. 4 (a), or in FIG. 4 (b). As shown, the lounge-shaped end face 22b may be formed. However, in the latter case, it is necessary to prevent the opening 23 from becoming too small due to the end face 22b.

The elastic cap 3 is integrally formed of a thermoplastic elastomer, and has a cylindrical portion 31 that is airtightly fitted to the outer peripheral surface of the suction tube main body 2, and an end surface portion that closes the base end opening 22. 32 and a suction hose connecting member 33.

The suction hose connecting member 33 is projectingly provided at the center of the circular end face portion 32, and has a tubular shape with a diameter dimension that allows the suction hose 4 to be externally fitted and connected thereto, and the suction tube main body 2 has a central portion thereof. A ventilation hole 34 communicating with the inside is formed. A ridge 35 for preventing the suction hose 4 from being pulled out is formed on the outer peripheral surface of the suction hose connecting member 33. However, since the elastomer itself of the material adheres to the suction hose 4, The ridge 35 may not be particularly provided.

The suction cylinder 1 is used by fitting the elastic cap 3 into the proximal end opening 22 of the suction cylinder main body 2 and fitting and connecting the suction hose 4 to the connecting member 33. When guiding the suction tube 1 to the treatment site of the living body or removing the suction tube, as shown in FIG. 3, the suction portion mainly around the base portion 33a of the suction hose connecting member 33 and the tip of the suction hose connecting member 33 is sucked. A bending moment as indicated by an arrow A acts on the hose neck 4a, but the elastic body integrally formed of an elastomer has a suction hose connecting member base 33a which is formed by the appropriate elasticity and flexibility of the cap 3. Since it can be flexed as needed, accidents such as damage, chipping, and cracking of the connection part (shown by 52 in Fig. 5) and its attachment part 55 that have often been encountered in the medical field can be completely avoided. .

Further, the suction hose connecting member 33 is bent as necessary, whereby the suction hose neck 4a is prevented from being sharply bent or pulled, and the life of the suction hose 4 is extended. Moreover, since the suction hose connection portion 33 and the suction hose 4 are well matched, there is an advantage that the suction hose 4 is difficult to pull out.

Further, by fitting the elastic cap 3 onto the hard and smooth outer peripheral surface of the glass or synthetic resin material of the suction cylinder main body 2, airtight insertion can be easily performed and the elastic cap is easily attached. The elastic body cap 3 can be easily separated from the suction cylinder body 2 by winding the edge of the elastic body 3 (while separating the elastic body cap 3 and the suction cylinder body 2 to form a gas layer therebetween). The suction cylinder body 2 with the elastic cap 3 separated has a simple cylindrical shape without a squeezed portion, and the elastic cap 3 also has a thin vent hole 34, but has a shallow vessel shape. Separation into these two members makes cleaning, drying, sterilization, packaging, storage and handling at that time extremely easy.

The elastomer used in the elastic cap 3 of the present invention has a shore hardness (A) of 57 to 78 measured by JIS K7215 and a 100% modulus measured by JIS K6301. Tensile strength is 2.5-6. When it is 6 MPa and the tensile strength is in the range of 7.1 to 13.9 MPa, the elasticity and flexibility of the elastic cap 3, especially the suction hose connecting member base 33a, and the adhesion to the suction tube main body 2 The overall durability when negative pressure is applied is good.

In particular, by using a thermoplastic elastomer (TPE) as the material of the elastic cap 3, injection molding can be performed like plastic, and the moldability is good, and the vulcanization / crosslinking process is also possible. The above mechanical properties and rubber physical properties can be obtained without passing through, and it is advantageous in terms of chemical resistance and durability.

Regarding the above-mentioned mechanical properties, even if the material of the elastic cap 3 is rubber, it can be partially satisfied, but the rubber is forced to be added with a compound, that is, vulcanized, in order to maintain those properties. Therefore, it may be incompatible with the purpose of this invention because it is treated as containing impurities, and the rubber itself has too many double bond residues that are essential for the molecular structure, and severe sterilization or cleaning is required. When it is made, it causes severe deterioration and easily embrittles, causing cracks and chips, which is poor in durability and unsuitable.

The position of the suction hose connecting member 33 formed integrally with the elastic cap 3 may be on the side surface of the cap or the like, but the negative pressure distribution in the suction cylinder 1 due to suction and the negative pressure to the elastic cap 3 In order to make the action uniform, it is preferable that the suction hose connecting member 33 is provided at the center of the circular end face portion 32 that abuts the base end opening 33 of the suction cylinder main body 2 as shown in the illustrated example. .

There is also a method of fitting the elastic cap 3 into the proximal end opening 22 of the suction cylinder main body 2, but in that case, the elastic cap is moved inside the suction cylinder main body 2 by the negative pressure in the suction cylinder 1. There is a possibility that it will be attracted to, and this method should be kept in view of the ease of attachment and detachment.

Since the elastic cap 3 is attached to the base end opening 22 of the suction cylinder main body 2, if the suction cylinder main body 2 is transparent, the elastic cap 3 is not necessarily a transparent member that allows the inside to be observed. Is also good.

It is also conceivable that the elastic cap 3 and the suction cylinder main body 2 are threaded with each other for the purpose of obtaining a bonding strength, but rather, the structure is rather complicated, and the fitting required in the medical field is only required. Not only is the lack of quickness in combination, but also the detergency is reduced, which is not preferable.

In the above-described embodiment, the case where the suction cylinder body 1 has a cylindrical shape with a uniform diameter has been shown, but the present invention is not limited to this, and the tip opening portion 21 that contacts the living body is provided. The side may be widened or there may be a part where the diameter changes in the middle. For example, a plurality of suction cylinder main bodies 2 having the same diameter of the proximal end opening 22 and different diameters on the distal side from the elastic cap 3 having the same diameter are prepared, and the site where the living body is applied is prepared. It is also possible to make a selection depending on the treatment and treatment content. Further, the suction cylinder may have an elliptic cylinder shape other than the cylindrical shape.

[0027]

[Effect of device]

 The suction cylinder of the medical suction device of the present invention is formed of a transparent member such as glass or hard synthetic resin as described above, and extends from the distal end opening on the living body contact side to the proximal end opening on the suction hose connection side. , A suction cylinder main body having a cylindrical body with a substantially uniform diameter, and a thermoplastic elastomer integrally formed with the suction cylinder main body. The suction cylinder main body is detachably fitted into the base end opening of the suction cylinder main body. The shape of the suction cylinder main body is simplified because the tubular suction hose connecting member that has a vent hole that links the inside of the suction cylinder main body and the inside of the suction cylinder main body is formed of an elastic cap that projects outside the closed portion. Since it can be easily manufactured without special skill and skill, and the elastic cap can be easily manufactured by molding, the specified quality and performance can be obtained while reducing the manufacturing cost. .

Further, the elastic cap can easily obtain the necessary airtightness only by being fitted on the suction cylinder main body, and can be easily separated from the suction cylinder main body after use, as described above. Both have a simple shape and are easy to wash, dry, sterilize, or package, store, and handle.

Further, since the suction hose connecting member that is integrally provided on the elastic cap can be elastically deformed and bent as necessary, the hose of the suction tube that has been apt to occur in the medical field in the past. Accidents such as damage, chipping, and cracking of the connection part can be avoided, and sudden and local bending and pulling of the suction hose can be prevented, and the life of the suction hose can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a suction cylinder according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where the suction cylinder is separated according to the embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a main part showing a state where the suction cylinder is separated according to the embodiment of the present invention.

FIG. 4 is a perspective view showing another embodiment of the suction cylinder body.

FIG. 5 is a side view showing a conventional suction cylinder.

[Explanation of symbols]

 1 Suction Cylinder 2 Suction Cylinder Main Body 3 Elastic Cap 4 Suction Hose 21 Tip Opening 22, 22, 22a, 22b Base End Opening 33 Suction Hose Connecting Member 34 Vent

Claims (1)

[Scope of utility model registration request] 1. A tubular member which is formed of a transparent member such as glass or hard synthetic resin and has a substantially uniform diameter from a distal end opening which is a living body contact side to a proximal end opening which is a suction hose connection side. It is integrally formed with the body of the suction cylinder by a thermoplastic elastomer, and is detachably fitted to the base end opening of the suction cylinder main body to close the base end opening and communicate with the inside of the suction cylinder main body. A suction cylinder for a medical suction device, comprising a tubular suction hose connecting member having a vent hole and an elastic cap projecting outward from the closed portion.