JPH01158956A - Container for infusion solution - Google Patents

Abstract

PURPOSE:To stabilize a dripping speed and to allow content to perfectly flow out, in a bottle-shape container by blow molding, by forming the cross-section of a body part into an almost square shape and providing ridges protruding outwardly to the central parts of the left and right side parts of the body part in an up-and-down direction and forming inwardly recessed depressed parts having an almost triangle to both end parts of said ridges. CONSTITUTION:A mouth part 2 is formed to the upper part of a container 1 for an infusion solution, and a flange is provided to the peripheral surface of said mouth part 2. Shoulder parts each having a smooth curved surface are formed to the mouth part 2 from the base part thereof before, behind, left and right so as to become the curved surfaces inclined toward the body part 3. The cross-sectional shape of the body part 3 has an almost square shape and ridges 6 are provided to the almost central parts of the side parts 5 of the body part 3 in the up-and-down direction of the body part 3. Further depressed parts having an almost triangle are provided to the upper and lower parts of both end parts of the ridges. Each of the depressed parts is formed into such a triangle that the both end parts of the ridge 6 are set to apexes and the direction of each shoulder part 4 or the direction of the bottom part is set to a bottom side. The length of the bottom side of the triangle is pref. set to about 1/3-4/5 the width of each of the side surfaces 5 of the body part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a container for infusion. More specifically, the present invention relates to an infusion container containing an intravenous solution or the like.

[Prior art]

Conventionally, medical infusion containers containing intravenous fluids, etc. have been made of glass or synthetic resin bottles, with air holes in the spout to allow air to enter the bottle as the intravenous fluid decreases. and (2) It is known that a container made of flexible synthetic resin is used, and the shape of the container changes as the amount of intravenous fluid decreases.

[Problem that the invention seeks to solve]

However, if the entire amount of pins mentioned in ■ above are used, the air in the hospital may get mixed into the intravenous fluid, which may lead to the problem of nosocomial infection. When the shape of the container deforms as the container decreases, there is a problem that depending on the way the deformation occurs, the intravenous fluid inside the container may not come out completely, and even if it does come out completely, the way the shape deforms is inconsistent. Another problem is that the outflow rate of the infusion solution varies from container to container.

[Means for solving problems]

The present inventors have solved the above-mentioned problems of conventional infusion containers, and as the intravenous fluid, etc. flows out from the infusion container, the shape of the container is always stably deformed to a constant shape, and the infusion fluid, etc. is kept in a constant shape. In order to provide an infusion container that can drain fluids at a relatively high rate and completely, as a result of extensive research, we have achieved the above objectives by providing protrusions at specific positions on the body of the container to encourage deformation of the body. The present inventors have discovered that the following can be achieved, and have completed the present invention.

That is, the gist of the present invention is a bottle-shaped container formed by blow molding, in which the cross-sectional shape of the body is approximately square, and the right and left side surfaces of the body have a substantially central portion. The present invention relates to an infusion container characterized in that an outwardly projecting ridge is provided in the vertical direction, and substantially triangular inwardly recessed portions are formed at both ends of the ridge.

An example of the container of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of the container of the present invention, FIG. 2 is a side view of the container shown in FIG. 7, FIG. 3 is a sectional view taken along line A-A, and FIG.
It is a sectional view of B.

In the figure, l indicates an infusion container, C indicates a mouth, 3 indicates a body, G indicates the front of the body, left indicates a side surface of the body, 6 indicates a protrusion, and RI indicates a depressed portion.

The illustrated infusion container 1 has a mouth 2 formed in the upper part of the container, and seven lunges are provided on the circumferential surface of the mouth.

At the base of the mouth part, shoulders with smooth curved surfaces are formed on the front, back, left and right sides, and these shoulders have curved surfaces that slope toward the body of the container.

The body part 3 has a substantially rectangular cross-sectional shape, and a protrusion 6 is provided approximately in the center on the left side of the body part 3 in the vertical direction of the body part. Furthermore, approximately triangular depressions are provided at the upper and lower portions of both ends of the protrusion 6. The depressed portion has a triangular shape with its vertices at both ends of the protrusion 6 and its base in the direction of the shoulder or the bottom 6, respectively. The length of the base of the triangle is preferably about ⅓ to v5 of the width of the side surface 5 of the body.

The illustrated infusion container 1 stores, for example, an infusion solution, and during infusion, the infusion solution is guided through a tube with the mouth portion 2 facing down.

Here, as the internal pressure of the infusion container decreases as the infusion progresses, the infusion container gradually deforms due to atmospheric pressure.

The body 3 of the infusion container 1 has a protrusion 6 extending from the top to the bottom of the body at approximately the center of the left and right side parts 3.
When the liquid flows out, the protrusions 6 bulge outward, that is, the body 3 is flattened, and the distance between the front tongue of the body and its opposing surface narrows, and the body deforms so that they come into contact with each other.

Contrary to the protrusions 6, substantially triangular recesses 7 are provided at the upper and lower parts of the protrusions 6, which are recessed from the surface of the side surface 5, to uniformize the deformation of the parts near the shoulder and bottom of the container. It functions to transform

As a result, the deformation of the container caused by the outflow of the liquid inside the container is mainly caused by the side surface 5 of the body 3, while the shoulder and bottom parts are shaped. The vertical displacement of the surface becomes constant.

The infusion container of the present invention is made of synthetic resin such as polypropylene, polyethylene, polyvinyl chloride, etc. by blow molding such as direct blow molding, stretch blow molding, and injection blow molding. It is desirable that this infusion container be as transparent as possible so that it can be visually confirmed that there are no impurities mixed in with the intravenous fluid in the container, and it is also suitable for heat sterilization up to about 20℃. You also need to be patient. For this reason, for example, a biaxially stretched blow bottle made of polypropylene or the like is preferably used. In addition, when this infusion container is turned upside down and the intravenous fluid, etc. inside it spills out, the infusion container deforms by the same amount as the amount of the drip fluid, etc. that spilled out, even without air replacement, and the content decreases. As such, its wall thickness is sufficiently thin. The wall thickness of an infusion container varies depending on the container's capacity, required strength, material, etc., but when polypropylene is used, for example, it is usually appropriate to have a wall thickness of about 300-400 μm.

In addition, the main part of the infusion container that should be deformed is the body of the container, and it is preferable that the opening of the container not be deformed from the viewpoint of operations such as filling with intravenous fluid and connecting an infusion pipe. , the mouth of the infusion container is thick, the shoulder of the container,
It is desirable that the body and the bottom have a structure in which the wall thickness distribution varies, such as by making the body thin.

〔Effect of the invention〕

Since the infusion container of the present invention uses a thin-walled container made of synthetic resin, it has excellent transparency and impurities can be easily detected. Air replacement is not required, there is no risk of in-hospital infection, and the dropping rate is stable, and the contents can be completely drained.

[Brief explanation of the drawing]

FIG. 1 is a front view of the container of the present invention, FIG. 2 is a side view of the container shown in FIG. 1, FIG. 3 is a sectional view taken along line A-A, and FIG.
It is a sectional view of B. In the figure, l indicates an infusion container, C indicates a mouth, 3 indicates a body, q indicates the front of the body, 3 indicates a side surface of the body, B indicates a protrusion, and 7 indicates a recessed portion.

Claims (1)

[Claims] (1) A bottle-shaped container formed by blow molding, the cross-sectional shape of the body is approximately square, and the left and right sides of the body have an outward protrusion approximately in the center. An infusion container characterized in that a protrusion is provided in the vertical direction, and substantially triangular inwardly recessed portions are formed at both ends of the protrusion.