JPH0441863Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a medical solution container for intravenous drip, which is integrally molded entirely from a flexible plastic material by blow molding, and uses an air needle. The present invention relates to an improvement in a container for an intravenous drug solution that allows a drug solution to be dripped without causing a drop.

Prior Art The entire body is integrally molded from flexible plastic, and as the chemical solution continues to drip, the interior becomes negative pressure, causing the entire body to collapse and deform.
2. Description of the Related Art Medicinal solution containers for intravenous drip are widely used because they can smoothly drip a medicinal solution without piercing the air needle.

A conventional drug solution container for intravenous drip of this type has a columnar body with an oval cross section, the top and bottom of which are closed, a hanging portion is formed at the top, and a drug solution drip opening is formed at the bottom. (for example, Japanese Utility Model Publication No. 49-9671), there is no guarantee that the deformation caused by the dropping of a chemical solution will necessarily cause the container to collapse from the top; therefore, if the container begins to collapse halfway, This has been accompanied by problems in that the smoothness of dripping of the chemical liquid has been hindered, and it has been difficult to easily visually check the remaining amount of the chemical liquid from the outside.

Therefore, as a method to deal with this problem, band-shaped flat parts are formed on both sides of the body with an oval cross section.
It is known that the width of this flat part is set to the minimum dimension at the position corresponding to the initial height of the chemical solution, and gradually increases from the top to the bottom of the container (Japanese Utility Model Publication No. 59-24040). . This thing is
The ease with which the container collapses is controlled by the width of the flat part, and when the internal pressure becomes negative as the drop of the chemical solution progresses, the container should be controlled by the width of the flat part. It is assumed that the collapse will definitely start from the position of .

Problems to be Solved by the Invention According to this prior art, since flat parts are formed on both sides of the container, the maximum amount of crushing deformation of the container is limited by these flat parts. Therefore, the final amount of chemical solution remaining in the container (the amount of chemical solution that ultimately remains in the container when the drug solution is dropped from the container without introducing air into the container; the same applies hereinafter) It had the serious drawback of becoming an unreasonably large number.

Therefore, in view of the drawbacks of the prior art, the purpose of this invention is to make the cross-sectional shape of the body into a rugby ball shape, and to increase the rigidity of the body in the downward direction, thereby creating a container that can be used for dripping of medicinal solutions. To provide a new drug solution container for intravenous drip, in which the crushing deformation not only starts from above reliably, but also allows the final amount of drug solution to remain small since there is no flat part that limits the amount of crushing deformation.

Means for Solving the Problems The structure of this invention to achieve the above object is that the body is integrally molded from a flexible plastic material by blow molding, and the cross-sectional shape of the body is rugby ball shape. A hanging part is formed above this,
In addition, the lower part of the body is smoothly connected to the drug solution dripping port formed at the lower end, and a downward arcuate bent rib is formed over approximately the entire length of the width.

In this configuration, since the entire body is integrally molded by blow molding, the body part whose circumference is gradually reduced is connected smoothly to the drug drip opening formed at the lower end. The lower part of the body has a wall thickness that gradually increases from the top to the bottom, and is provided with arc-shaped bending ribs, so that the weight of the medicinal liquid sealed inside is reduced by the body. In addition to preventing the lower part of the body from collapsing, the lower part of the body is less likely to collapse than the upper part, and therefore, collapsing deformation from above is reliably guaranteed.

On the other hand, since the cross-sectional shape of the torso is rugby ball-shaped, the crushing deformation of the torso is such that the inner sides of the walls forming both sides of the torso are in close contact with each other. The amount of chemical solution remaining can be sufficiently reduced.

It works as described above.

Example The drug solution container for infusion comprises a body 10 having a rugby ball-shaped cross section, a hanging part 11 formed above the body 10, and a drug solution dripping port 12 formed at the lower end (Figs. 1 and 2).

The body 10 is integrally molded from a flexible thermoplastic material such as polypropylene or polyethylene by blow molding. Therefore, the overall shape of the body 10 is such that its width (referring to the dimension in the direction of arrow Y-Y in FIG. 1) is above the specified liquid level L when a specified amount of chemical solution X is stored It is assumed that it gradually decreases, while forming an arcuate shoulder portion 10a at the bottom and smoothly continuing to the drug solution dripping port 12. Since the body part 10 is integrally molded by blow molding using a parison of uniform thickness, the wall thickness of the body part 10 is determined according to the specified liquid level L.
In the upper part, it gradually increases from the lower part to the upper part, and furthermore, the body part 10
Even in the range that smoothly continues from the lower shoulder portion 10a to the drug solution dripping port 12, the thickness thereof gradually increases from the top to the bottom.

The hanging portion 11 is erected in the shape of a tongue in a recess 10a formed at the top of the body portion 10, and as a whole,
It can be bent left and right through grooves 11b, 11b in the base, and is also provided with a round hole 11a for hanging (FIGS. 1 and 3).

A cap 13 is fitted into the drug solution dripping port 12 and is sealed with a seal 13a. Note that the cap 13 is for sealing off the drug solution dripping port 12 after injecting a specified amount of the drug solution X.
It is made of a rubber material such as butyl rubber so that an intravenous needle can be inserted here during infusion.

Downward arc-shaped bending ribs 14, 14 are formed on the lower wall surface of the body portion 10. The bending rib 14 is formed over almost the entire width of the body 10 at the transition portion of the body 10 to the chemical solution dripping port 12, and is depressed in the shape of a groove at the top and shaped like a strip at the bottom. It is formed in a bulging step-like cross-sectional shape (Fig. 3).

The intravenous drug solution container having such a configuration has a cap 13.
Insert the drip needle T into the tube and drip the enclosed drug solution X.

When the drug solution X is dripped and discharged through the drip needle T, the inside of the body 10 becomes negative pressure, and therefore,
The body 10 collapses and deforms as the chemical solution X is dropped. (Figure 4). Here, the trunk 10 is
Above the specified chemical liquid level L, the wall thickness gradually increases, and a recess 10a is formed at the top for erecting the hanging part 11, and below the specified chemical liquid level L, the wall thickness gradually increases. Based on the weight, an internal pressure that increases as you move downward is applied, and the wall thickness gradually increases at the transition part continuous with the chemical solution dripping port 12, and the bending ribs 14, 14 prevent the body 10 from collapsing. It is designed to prevent Therefore, the body 10 due to the dropping of the chemical solution
The collapse of the chemical liquid definitely starts from above it, especially near the specified chemical liquid level L.

Once the body 10 begins to collapse and deform, the cross-sectional shape of the body 10 at that position is a rugby ball shape with nothing special to prevent collapse, so both wall surfaces of the body 10 are , can be crushed until their inner surfaces come into close contact with each other, and as the dripping of the chemical solution X further progresses, this crushing progresses downward (FIG. 5). At this time, since the cross-sectional shape of the body part 10 is rugby ball shape, the lower bending ribs 14, 14 of the body part 10
The force required to collapse and deform the torso 10 is small until the progress of collapse is stopped by this, and therefore, problems such as inadvertent backflow of blood occur during infusion. There's no fear. Moreover, when the progress of the collapse is prevented by the bending ribs 14, 14, the dripping ends, and the final amount of the drug remaining in the body 10 at this time is also small (see the same figure).

Effects of the invention As explained above, according to this invention, the torso is integrally molded by blow molding from a flexible plastic material, the cross-sectional shape of the body is rugby ball shape, and a hanging part is formed above. In addition, the lower part is smoothly continuous with the chemical solution dripping port at the lower end, and a downward arc-shaped bent rib is formed over almost the entire width of the body, so that when dropping the drug solution, the body Not only can the starting position of the crushing deformation of the body when negative pressure is applied to the body be reliably near the specified chemical level, but also because there is nothing to limit the amount of crushing deformation, the body can be easily collapsed until the inner surfaces of both walls forming the container come into close contact with each other, which has the excellent effect of making it possible to sufficiently reduce the amount of the final chemical solution remaining.

[Brief explanation of the drawing]

1 to 5 show examples, FIG. 1 is an explanatory central longitudinal section, and FIGS. 2 and 3 are cross sections taken along the line A-A and B-B in FIG. 1, respectively. Figures 4 and 5 are explanatory diagrams of usage conditions. DESCRIPTION OF SYMBOLS 10...Body part, 11...Hanging part, 12...Medical solution dripping port, 14...Bending rib.

Claims (1)

[Scope of utility model registration request] In a drug solution container for intravenous drip that is integrally molded from a flexible plastic material by blow molding, a hanging portion is formed above the body with a rugby ball-shaped cross section, while the lower part of the body is formed at the lower end. 1. A drug solution container for intravenous drip, characterized in that the drug solution drip opening is smoothly continuous with the drug solution drip opening, and a downward arcuate bent rib is formed over substantially the entire width of the container.