JPS61259670A - Liquid container - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a liquid container that can be used as a medical bag. (Details) The present invention relates to a medical bag suitable for use as a container for liquids, etc., in which the amount of liquid inside can be visually checked and there is no risk of internal air flowing into the body.

[Prior art 1] Conventionally, a glass container has been used as an infusion container used to infuse medicinal solutions such as electrolytes and amino acid preparations into the body. However, when administering an infusion using a glass container, it is necessary to install a vent or vent to introduce air into the glass container from the outside in an amount equal to the volume of the liquid being dispensed. be. For this reason, even if the inside of the system is sterilized for 10 minutes beforehand, there is a high risk that the liquid content will be contaminated by the outside air introduced into the glass container, and the liquid content may be injected directly. Later, the air introduced into the glass container will flow out into the drip tube connected to the glass container, so if you ignore the time when axialization is complete, there is a risk of air flowing into the body. It was dangerous to be wealthy.

Near ■, this J: Instead of glass containers, containers made of flexible synthetic resin such as soft vinyl chloride resin (generally
~・It is called a bag. ) have come to be used as containers for infusions.

``The invention solves the problem''] In the case of flexible 171 synthetic resin V-shaped containers, the content liquid is released at once because the container is flexible, and due to the popularity, the container itself is J in the case of a glass V container:
This can be done without introducing air from outside during the discharge of the liquid contents. In this way, in order to perform infusion in a closed system, J
There is a risk of infection to the body of the recipient due to air contamination of the sea urchin liquid, and there is also a risk of infection to the body of the recipient due to air contamination of the sea urchin liquid. At the time of completion, the content of the eight vessels becomes substantially zero, and there is no risk of air entering the body, allowing for extremely safe infusion.

However, as shown in FIG. 5, when performing infusion using the flexible ↑η synthetic resin container 51, there is no air present in the container 51 (if air exists, it is very small). ), with the IJ+ discharge of the content liquid 52, the container 51
The inner surfaces of each other are the bottom 53111! IJ: I will follow you closely. At this time, a portion of the content liquid 52 is left behind at the inner surface mutual contact area by the capillary tube 9 due to surface tension, so that the liquid level 54 of the content liquid 52 draws an irregular curve.

For this reason, the remaining amount of the liquid 52 in the container 51 or the injection 9 into the body becomes unclear. Therefore, in reality i
'i'JDA l! I When filling a synthetic resin container with the liquid, a certain amount of air (for example, 50111ff culm for a 500 mI! capacity container) is injected, which prevents the inner surface of the container from coming into close contact with the container during infusion. , is used by keeping the liquid level constant so that the contents 'lj,@ can be visually confirmed. For this reason, a container made of flexible synthetic resin is used.
．． : In this case, there was also a risk that the air injected into the container would leak out after the infusion of the contents was completed.

Therefore, the present invention is also an attempt to partially solve the problems of the conventional products as described above.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a novel liquid container. Another object of the present invention is to provide a medical bag in which the amount of liquid inside can be visually checked and there is no risk of internal air flowing into the body. A general object of the invention is to provide a medical bag suitable as a container for infusion.

Means for Solving Problem 1] In order to achieve the above objectives, the present inventors have made various inspection improvements to liquid containers such as flexible synthetic resin medical bags. F on the inner surface of the container from the top to the bottom
By creating a convex or concave part, even if the liquid container is completely crushed by atmospheric pressure, the inner surface will not come into close contact with each other and a partial space can be formed between the two parts and the lower part. It is something. If a liquid container having such a structure, for example a medical bag, is filled with the liquid contents and only air corresponding to the volume of the above-mentioned partial space is filled, the liquid level of the liquid contents in the medical bag at the time of infusion can be reduced. The remaining amount of the liquid in the medical bag is always constant in the above space, and the remaining amount of the liquid can be easily checked, and the liquid infusion is completed. It enters the medical bag and does not come out of the medical bag unless special suction is performed, so when performing normal infusions, there is no risk of it leaking out of the medical bag and entering the body. .

[Actual tJ Color Example] Hereinafter, a case in which the liquid container of the present invention is applied to a medical bag will be described in more detail with reference to the drawings.

-〇- A medical bag (liquid container) 1 of the present invention is shown in Fig. 1.
J-J: It is made of flexible +11 synthetic resin with a small-diameter opening 5 at the upper end. In addition, a colored line 10 is provided on the center surface of the bag, and a convex portion 6 (
Fig. 2A, Fig. 3Δ, Fig. 3B) or recess 7 (Fig. 2B)
(Fig.) is set up and features the following! ].

There is no particular limitation on the shape of the convex portion 6J or the concave portion 7,
Even when the medical bag 1 is completely crushed by atmospheric pressure, the inner surfaces do not erect each other, and a partial space 8 extending from the second part to the lower part as shown in FIG. 1 can be formed. Bye. For example, Fig. 2A shows two rows of protrusions 6 arranged above and below J in Fig. 3A; It's okay to go to market. Further, the convex portion 6 may be continuously protruded vertically as shown in FIG. 3A, or it may have a large number of convex portions 16 extending in the horizontal direction as shown in FIG. 3B. It may be intermittently protruding. The same can be said for the case where the recess 7 is provided as shown in FIG. 2B.

Furthermore, if the convex part 6 and the concave part 7 form the partial space 8 from the upper part to the lower part of the medical bag 1, the convex part 6 and the concave part 7 can be formed along the axial direction of the medical bag 1 as shown in FIG. In addition to being formed in a straight line, it may be formed obliquely, and it may also be formed not only in a straight line but also in a curved line, and it is provided on the inner surface accordingly.

Furthermore, the upper and lower parts of the medical bag 1 as used herein do not necessarily mean only the upper end (opening 5) and lower end 3 of the medical bag 1; The term ``lower'' refers to a portion 1t that is closer to the upper end 3 than the lower portion of the medical bag 1, and ``lower'' is a relative portion that broadly refers to a portion that is closer to the opening 5 than the upper portion of the medical bag 1. In other words, the partial space 8 formed below the -F section of the medical bag 1 is for visually checking the area of the liquid content 2 present in the medical bag 1. It is not necessary to strictly check the amount of liquid 2 all the time, but only when necessary, for example, when the amount of liquid 2 is low, or when the content of liquid 2 is almost half. Nodoka or
Although it is necessary to be able to confirm the amount of liquid 2 throughout the entire process, there are various situations in which it is not necessary to strictly check the amount of liquid 2, especially when it is completely filled and when it is completely empty. (This is because three cases are possible.

The medical bag 1 of the present invention is further provided with a convex portion 6 or a concave portion 7 as required, as shown in FIG. 1 and 2A on the outer surface of the area facing the partial space 8. As shown in FIG. 2B, colored lines 10, such as blue, red, yellow, etc. lines, may be provided.

All of these improve the visibility of the amount of liquid inside the medical bag 1 when it is used.

The flexible synthetic resins constituting the medical bag (liquid container) 1 of the great invention include vinyl chloride resin, low-density polyethylene, polypropylene, dylene-vinyl acetate copolymer, ethylene-ethyl acrylate-1 - copolymer,
Conventional medical drugs such as styrene-butadiene copolymers,
Any flexible synthetic resin used for bags can be used.

Further, unlike general low-density polyethylene, the molecule +M structure is +CI-12CH2+ in the linear chain, and α-olefin or other heptadmer 1 is preferably α-olefin, particularly preferably α-olefin having carbon number/i to 8. Linear low density [σ polyethylene (1-inear LOW Density Po
The use of LLDPE) is also conceivable. This LmDPE has good flexibility and high transparency, etc., like general low-density polyethylene with long chain branches, while it has high It is known as a flexible synthetic resin that can be blow molded due to its heat resistance and good mechanical strength. By using DPI, the medical bag that can be sterilized can be manufactured.

The medical bag 1 is made by kneading two pieces of flexible synthetic resin sheets 1- as described above together, and heat-welding the edges with a high-frequency seal or the like! It can also be manufactured by melting such a flexible synthetic resin, first forming a parison, performing IC, and then blow molding, or by other methods known in the art. It is also possible to manufacture by Further, the convex portions 6 and concave portions 7 provided on the inner surface of the medical bag 1 may be formed integrally when forming the wall surface of the medical bag 1, and when forming the convex portions 6 roughly, they may be formed separately. It can also be molded by attaching the member constituting the formed convex portion 6 to a predetermined portion of the wall surface.

When the medical bag 1 configured as described above is used, for example, as an infusion container, the inside of the medical bag 1 is first filled with the liquid content 2 and air corresponding to the volume of the partial space 8. TeJ3<. When the infusion set 11 is connected to the opening of this medical bag 1 and the infusion is started, the fourth
As shown in the figure, as the content liquid 2 decreases, the medical bag 1
The inner surfaces of the inner surfaces of the inner surfaces of the upper end portion 3 become closer to each other, and the liquid level 4a of the inner liquid 2 draws an irregular curve because a part of the inner liquid 2 is left behind in the condensed area due to capillarity, but there is a partial space. 8
Only the liquid level 1a at a'31-J is stationary because the inner surface phase H is not in close contact with it, and if you look at this area, you can recognize the remaining content of the liquid 2 or the infusion M. At this time, there is a scale 9 on the outer or inner surface of the portion of the medical bag 1 where the partial space 8 is formed, so that it is possible to easily and accurately judge the amount of remaining liquid 2 in the medical bag 1. . In addition, if the inner surface of the medical bag 1 where at least the partial space 8 is formed has a satin finish, the partial space 8 may be
3, the area where the liquid content 2 is present appears transparent, but the area where the liquid content 2 is present is translucent, so the liquid surface 4a of the liquid content 2 becomes clear and visual recognition becomes easier.

Furthermore, if the colored lines 10 are drawn on the outer surface of the opposing parts of the partial space 8 of the medical bag 1, the part where the liquid content 2 is present in the partial space 8 is determined by the refraction of light by the liquid content 2. Since it appears to be dyed exactly in the color of color line 10, it is easier to visually recognize it.

As the infusion progresses, the medical bag 1 is finally in a state where it cannot be crushed any further by atmospheric pressure (partial space 8
(and the state in which the inner surfaces are not in close contact with each other only in the vicinity of the ground opening end 5, etc.) In any case, all of the air initially filled in the medical bag 1 enters the partial space 8, The medical bag 1 will not leak into the infusion cells 1 to 11. The exposure of the air filled into the medical bag 1 together with the liquid content 2 is most preferably equivalent to the volume of the partial space 8, but at least the volume of the liquid content 2 in the partial space 8 is less than this. If the amount is sufficient to not significantly affect the displacement of the liquid level 4a, J: <, and on the other hand, even if the suspension J: equivalent to the volume of the partial space 8 is large, depending on the atmospheric pressure, the medical bag may Even in a state where it cannot be crushed any further, the inner surfaces of the medical bag 1 cannot be brought into close contact with each other, similar to the partial space 8, and the amount corresponding to the volume of the other space formed is If the excess amount is small, there will be no problem.

[Effects of the Invention] As described above, the present invention provides a flexible synthetic resin liquid container having a frontage in at least one place, and a convex portion or a concave portion extending from the upper part to the lower part on the inner surface. Therefore, when used as an infusion container, for example, an extremely small amount corresponding to the volume of the partial space formed by the convex portion or concave portion is contained in the liquid container together with the liquid content. If air is filled, the amount of liquid in the container during infusion will be as follows in the above partial space:
Since the level of the liquid content is constant, it can be easily recognized visually. In addition, even when the axial construction is completed, all the air filled in the container enters the partial space, and there is no risk of it leaking out. Therefore, it is extremely safe, and unlike conventional flexible synthetic (6) In the case of a medical bag made of fat, it is possible to make an excellent medical bag that solves the problem of internal air leakage that has been unavoidable in order to make it possible to visually check the amount of liquid inside.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment in which the liquid container of the present invention is applied to a medical bag, Fig. 2A is a cross-sectional view of Fig. 1, and Fig. 2B is a cross-sectional view of another embodiment. Surface view, ”;jr 3Δ
The figure is a longitudinal section 1 of the embodiment shown in Fig. 2Δ, Fig. 3B is a longitudinal sectional view of another embodiment, and Fig. 4 is a front view of the embodiment shown in Fig. 1 in a state of use. , Fig. 5 (,:1 is a front view of the conventional p5 therapy bag in use condition. 1...Medical bag (liquid container),! ')...listen[
1 part, 6.1G... Convex portion, 7... Concave portion, 8... Partial space, 9... Scale, 10... Color line. Applicant Ken Yamakoshi - Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. A liquid container made of a flexible synthetic resin having an opening in at least one location, characterized in that the inner surface thereof is provided with a convex portion or a concave portion extending from the upper portion to the lower portion. 2. The liquid container according to claim 1, wherein the convex portion or the concave portion is provided from the top to the bottom along the axial direction of the container. 3. The liquid container according to claim 1, wherein the convex portion or the concave portion is provided diagonally from the top to the bottom of the container. 4. The liquid container according to any one of claims 1 to 3, wherein the convex portion or the concave portion is continuously provided from the upper part to the lower part of the container. 5. The liquid container according to any one of claims 1 to 3, wherein the convex portion or the concave portion is intermittently provided from the top to the bottom of the container. 6. The liquid container according to any one of claims 1 to 5, wherein a scale is provided on the outer surface or inner surface of the portion where the convex portion or the concave portion is provided. 7. The liquid container according to any one of claims 1 to 6, wherein the inner surface of the portion where at least the convex portion or the concave portion is provided is subjected to a satin finish. 8. Claims 1 to 8, in which a colored line is attached to the outer surface of the portion opposite to the portion where the convex portion or the concave portion is provided.
The liquid container according to any one of item 7.