JPH0624574B2 - Medical bag and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an infusion bag used for transfusing glucose, amino acid infusion, physiological saline, etc., a blood bag for collecting and storing blood from a donor, etc. Regarding medical bags.

(Prior Art and Problems) Currently, the medical bag 51 shown in FIG. 10 is used for mixing and infusion of drug solutions.

The medical bag 51 was delivered from the sheet molding machine 2
After stacking sheets of synthetic resin, seal-cut into a bag shape with a mold, and then connect the connecting tube 5 to the upper end of the opening.
It is formed by inserting a protector 53 containing 2 and a connecting tube 54.

55 is an infusion tube.

However, such a medical bag has many opportunities to come into contact with the atmosphere during the stacking of two sheets or before the process, and a small amount of foreign matter such as dust or dust may adhere to the sheet surface due to static electricity. In particular, if these foreign substances adhere to the inner surface of the sheet, it is necessary to carefully wash them to remove them after commercialization, which is very complicated in the manufacturing process.
Moreover, it is unsanitary.

Also, since the bag obtained by stacking two sheets by the conventional method has the entire peripheral edge sealed, as shown in the cross-sectional view of FIG. 11, the narrow portion 56 formed near the seal portion.
When the liquid filled inside is blood, residual blood and coagulation occur in the narrow portion 56, and valuable blood is wasted.

(Means for Solving Problems) Therefore, the present invention has a main body formed in a bag shape and a bulging portion formed at an end of the main body, and the bulging portion is folded back toward the inside of the main body. Provided is a medical bag in which a sealing member is fitted into a folded portion, and a bulging portion into which the sealing member is fitted is capped with a plug to form an infusion port, and further such a medical bag. In order to manufacture efficiently, molten synthetic resin is extruded into a bag shape while blowing air, has elasticity, and is sandwiched by a conveyor that has a plurality of medical bag-shaped molds formed on the surface Then, the present invention provides a method for manufacturing a medical bag in which a medical solution is filled inside and then a sealing member and a plug are attached to the formed bulging portion to form an infusion port.

(Operation) In the present invention having the above-described configuration, by removing the plug body and inserting the infusion needle into the folded-back portion of the bulging portion through the sealing member, the internal medicinal solution can be led out.

Furthermore, when the bag is sandwiched by an elastic conveyor and formed into a medical bag shape, it can be formed aseptically without contact with the outside air and the force is evenly distributed throughout the bag, so it is uniform. Can be formed.

Further, since the inside of the main body is in a hermetically sealed state even when the infusion port is mounted, the mounting work can be carried out hygienically.

(Example) FIG. 1 is a schematic view showing the structure of an example of the medical bag 1 according to the present invention.

Reference numeral 2 denotes a main body formed by an inflation molding method, and an infusion port 3 is formed at the upper end of the main body.

As shown in FIG. 2 (a), the infusion port 3 is formed of a bulge 4 formed during molding of the medical bag 1 of the present invention, a sealing member 5 made of a hard plastic tube, and a polypropylene film. It is composed of a plug body 6 and a shrink tube 7. The method of assembling the liquid transfusing port 3 is shown in FIG.

The bulging portion 4 is folded back toward the inside of the main body, and then the sealing member 5 is fitted into the folding portion 40.

The shape of the tip of the bulging portion 4 is straightened along the sectional shape of the sealing member 5.

Next, the plug body 6 is capped on the bulging portion 4 into which the sealing member 5 is inserted, and finally the shrink tube 7 is attached to the outer circumference of the plug body 6 to complete the assembly.

Perforations 8 and a handle 9 are formed on the outer circumferential surface of the stopper 6 so as to facilitate opening.

Further, the shape of the infusion port may be constituted by a bulging portion 4, a sealing member 12 having a collar portion 13, and a contractible plug body 15 having a handle 14 as shown in FIG. Sealing member 12
Is fitted into the folded-back portion 41 of the bulging portion 4, the shape of the bulging portion 4 is adjusted, and the bulging portion 4 into which the sealing member 12 has been fitted is capped and assembled.

Next, a method for manufacturing the medical bag of the present invention will be described.

As shown in FIG. 4, the vinyl chloride resin is extruded into a bag shape by the inflation molding machine 16, air is blown into the bag while it is hot, the bag 17 is inflated, and the molding machine 18 installed in the extrusion path of the bag 17 is used. Mold into a bag.

The molding machine 18 has a medical bag mold 30 and nails 19 on the surface.
A plurality of conveyors 20, 21 and drive shafts 22, 2
3, 24, 25, the fixed shaft 27 via the spring 26,
It is composed of a pressing member 29 attached to 28.

As shown in FIG. 5, the molds 30 of the conveyors 20 and 21 correspond to the shape of the medical bag 1 of the present invention, and the main body 2
Groove 31 for liquid, groove 32 for bulging portion 4, liquid passages 10, 11
Grooves 33 and 34 are formed.

The conveyor 20 is further provided with the mold 3 as shown in FIG.
A plurality of claws 19 are provided along the line of each groove of 0.

As shown in the enlarged view of FIG. 7, the claw 19 is formed in a two-stage structure including a bag holding portion 35 and a cut forming portion 36.

The pressing member 29 is also provided corresponding to the shape of the medical bag 1, and is formed so as to press the conveyor 20 and the conveyor 21 having the claws 19.

The conveyors 20 and 21 are made of an elastic material such as thermosetting polyurethane.

Bag 17 extruded from inflation molding machine 16
Is sandwiched between the conveyors 20 and 21. Conveyor 2
Since 0 and 21 are pushed from both sides by the pressing member 29 utilizing the elastic repulsion force of the spring 26, the bag 17 is moved by the mold 30 and the claws 19 formed on the respective surfaces of the conveyors 20 and 21 as shown in FIG. , Formed in the shape of the medical bag 1.

Reference numeral 37 indicates a welded portion of the bag 17, and 38 indicates a cut portion. Type 3
0 is formed on the conveyors 20 and 21 made of an elastic material, and the conveyors 20 and 21 are pressed by the elastic repulsive force of the spring 26, so that the stress is not concentrated on one portion of the bag, and the entire bag is evenly distributed. Distributed.

Even if stress concentrates on one place, the conveyor 2
It is absorbed and relaxed by 0, 21, and the spring 26.

Therefore, there is no risk of bag damage or molding failure due to stress concentration.

At this time, the formed medical bag 1 has the liquid passages 10, 1
They are integrally connected via 1.

Next, as shown in FIG. 9, the liquid passages 10 and 11 are cut at predetermined positions, and the liquid is put into the medical bag 1 integrally connected through the liquid passages 10 and 11 as follows. Fill.

The medical bag 1 is placed on the horizontal base 39, and the saline solution, ACD-A, C is supplied from the liquid passage 10 of the first medical bag 1.
A blood preservation solution such as PD solution is filled while expelling the air inside.

Since the medical bag 1 is placed horizontally, the medical solution can be uniformly filled from the first medical bag to the last medical bag 1 '.

After the filling is completed, the liquid passages 10 and 11 are welded with a welder to separate the medical bags.

Finally, as described above, the sealing member and the plug are attached to the bulging portion 4 to form the infusion port, and the manufacturing is completed.

By subjecting the medical bag to high-pressure steam sterilization treatment, the shrinkable tube attached to the infusion port and the shrinkable stopper shrink, and the film-like stopper to the bulging portion and the sealing member are stronger and more airtight. It will be attached to the main body.

Next, an example of use of the medical bag 1 of the present invention will be described.

When the handle 9 of the stopper 6 is gripped with fingers and a force is applied in the circumferential direction along the perforations 8, the perforations 8 are broken and the folded-back portion 40 of the bulging portion is opened.

An infusion needle (not shown) is pierced through the folded portion 40, and the drug solution inside is supplied to the infusion via the infusion needle.

(Effects of the Invention) As described above, according to the present invention, (1) the number of parts can be simplified, and the cost can be significantly reduced.

(2) Since there is no need for the inner surface to come into contact with the atmosphere or foreign matter such as dust or dust to adhere to the inner surface in the manufacturing process,
It is hygienic.

(3) Since a uniform force can be applied to the entire bag when the bag is formed by the elastic conveyor, uniform products can be manufactured.

It is an invention having excellent effects such as.

[Brief description of drawings]

1 is a sectional view of a medical bag of the present invention, FIG. 2 is an enlarged sectional view and an exploded perspective view of an infusion port of a medical bag, and FIG. 3 is another embodiment of an infusion port of a medical bag. An enlarged sectional view and an exploded perspective view thereof, FIG. 4 is a schematic view showing a method for manufacturing a medical bag, FIGS. 5 and 6 are schematic views of a mold formed on the surface of a conveyor, and FIG. 7 is a conveyor. FIG. 8 is an enlarged view of the tip of a nail formed on the surface, FIG. 8 is a cross-sectional view of a bag formed by an inflation molding machine, FIG. 9 is a schematic view of a process for filling a liquid medicine, and FIG. 10 is a conventional medical bag. Schematic,
FIG. 11 is a sectional view taken along line AA of FIG. In the figure, 1 is a medical bag, 2 is a main body, 3 is an infusion port, 4 is a bulged portion, 5 and 12 are sealing members, 6 and 15 are plugs, 7 is a shrink tube, 16 is an inflation molding machine, 17 is a bag, 18 is a molding machine, 19 is a nail, 20 and 21 are conveyors,
22 to 25 are drive shafts, 26 are springs, 27 and 28 are fixed shafts, 29 is a pressing member, 30 is a mold, 39 is a horizontal base, 4
Reference numerals 0 and 41 denote folded portions.

Claims (2)

[Claims] 1. A body having a bag shape and a bulging portion formed at an end portion of the body, and a sealing member is fitted and inserted into the folding portion obtained by folding back the bulging portion inward of the body. A medical bag characterized in that an infusion port is formed by capping a bulging portion into which a sealing member is inserted and capped. 2. A synthetic resin in a molten state is extruded into a bag shape while blowing air, and the bag is formed by being sandwiched between a conveyor having elasticity and a plurality of medical bag-shaped molds formed on the surface thereof. After filling the drug solution into the
A method of manufacturing a medical bag, comprising forming an infusion port by attaching a stopper.