JP6098933B2 - Balloon for chemical liquid injector, method for producing the same, and chemical liquid injector equipped with the balloon - Google Patents

Description

The present invention relates to a balloon for a drug solution injector for carrying a drug solution for treatment and injecting the drug solution as needed, a manufacturing method thereof, and a drug solution injector equipped with the balloon.

For example, a medical fluid injector is widely known in which a cancer patient or the like carries a medical fluid for pain relief or a medical fluid for treatment, and injects the medical fluid into the body at any time.
As an example of such a chemical solution injector, there is a chemical solution injector disclosed in Japanese Patent Laid-Open No. 09-262285 (Patent Document 1).

  In this chemical solution injection device, the chemical solution bag is filled with the chemical solution by preventing air bubbles from entering, and the chemical solution bag (chemical solution bag) that discharges the chemical solution from the discharge port as the volume decreases, and the pressurizing hole A pressurization bag (chemical solution cartridge) that is detachably connected to the pressurizing means is integrally formed through a partition wall.

  That is, the chemical cartridge is made of a hard polymer material that is transparent or translucent and has a predetermined mechanical strength so that the consumption state of the chemical can be seen from the outside. In addition to acting as a partition member between the bag and the chemical cartridge, a partition wall made of an elastic body is provided between the inner wall of the chemical cartridge and the introduced gas can be sealed without leakage.

  Therefore, by introducing gas into the inside through the pressurizing hole, the space portion shielded by the partition wall is expanded and moved to the chemical solution bag side so as to pressurize. The bag is shrunk within the cartridge, and the chemical solution inside is sent to the flow control device.

  On the other hand, in Japanese Patent Application Laid-Open No. 2002-159572 (Patent Document 2), as a non-cylindrical and compact portable chemical solution infusion device, the inflating dimension is constrained in the process of inflating the balloon filling the medicinal solution outside the balloon. The one with the wall attached is proposed.

According to Patent Document 2, in a chemical solution continuous injector, a housing for housing a balloon is preferably formed by blow molding, but may be injection molding or the like, and the inner surface of the housing is smooth so as not to cause balloon rupture. In order to check the condition of the balloon and the remaining amount of the drug solution in the balloon, the material is transparent, the scale is attached, a flat rectangular parallelepiped, and the shortest one side is filled in the balloon It is disclosed that it is desirable to inject a volume of 100% and to design 50-80% of the diameter when the balloon is inflated freely.

JP 09-262285 A (paragraph 0009, paragraph 0019) JP 2002-159572 A (claim 3, paragraph 0008, paragraph 0014, paragraph 0018)

  The chemical solution injection bag described in Patent Document 1 is inseparable from the flow rate control unit, and even if the patient can carry the drug solution injection bag, it is assumed that it is integrated with the flow rate control unit. Therefore, it is not intended to carry the chemical solution injection bag itself, and the structure of the chemical solution injection bag itself is complicated and not easy to manufacture.

  In the chemical solution continuous injector described in Patent Document 2, since the housing has a flat shape instead of a cylindrical shape, it does not roll down like a cylindrical chemical continuous injector even when placed on a flat part such as a desk. In addition, since it can be stored in a pocket of a normal size, it has excellent operational effects such as good portability.

  However, although the balloon basically bulges in a cylindrical shape, there is no flat bulge, and the free expansion of the balloon is constrained by the partition wall of the housing, so that the short side of the flat cuboid It is necessary to design the length to be about 50 to 80% of the diameter when the balloon is filled 100% and the balloon is inflated freely. There are issues that need to be solved.

In view of the present situation, the present invention can provide a balloon for a drug solution injector that can always be flattened even when a balloon main body having a bottomed cylindrical shape is inflated, is simple in configuration, and easy to handle. And a manufacturing method thereof, and a drug solution injector equipped with the balloon.

In order to achieve the above object, the invention according to claim 1 of the present invention provides:
While constituting the bottomed balloon main body with elastic material,
In the balloon main body, a partition for partitioning the inside in the vertical direction is integrally formed from the bottom surface portion to the vicinity of the opening portion along the axial direction,
When inflated the balloon mainly by the partition wall, a liquid injection dexterity balloon, wherein the balloon principal was always to maintain a flat shape.

The invention according to claim 2 of the present invention is
In the balloon for medical fluid injectors according to claim 1,
The elastic material is
It is characterized in that the isoprene rubber or silicone rubber.

The invention according to claim 3 of the present invention is
In the balloon for medical fluid injectors according to claim 1,
The partition is
A plurality of balloons are provided along the axial direction in the balloon main body.

The invention according to claim 4 of the present invention is
In the balloon for chemical | medical solution injectors in any one of Claims 1-3,
Different chemical solutions are filled in the plurality of chemical solution storage portions formed by the partition walls.

The invention according to claim 5 of the present invention is
In the balloon for chemical | medical solution injectors in any one of Claims 1-4,
The rubber hardness of the balloon main body is
It is characterized by being durometer type D20-50.

The invention according to claim 6 of the present invention is
6. A drug solution injector according to claim 1, wherein the drug solution injector balloon is housed in a housing having a flat shape.

The invention according to claim 7 of the present invention is
A main body of a balloon having a bottomed cylindrical shape in which a partition wall for partitioning the inside is formed from the bottom surface portion to the vicinity of the opening portion along the axial direction and when the partition wall swells, the flat shape is always maintained by the partition wall. Is formed by integral molding of an elastic rubber material by injection molding or compression molding to form a balloon for medicinal solution injection.

The invention according to claim 8 of the present invention provides
In the manufacturing method of the balloon for chemical | medical solution injectors of Claim 7,
The partition is
It is characterized in that a plurality are arranged with a required interval.

The invention according to claim 9 of the present invention is
In the manufacturing method of the balloon for chemical | medical solution injectors of Claim 7,
The partition is
By changing the ratio of the thickness and the width of the partition wall, the flatness of the obtained balloon main body can be made variable.

The balloon for a medical fluid injector according to the present invention is composed of an elastic material with a balloon main body divided by a partition wall formed along the axial direction inside the balloon main body, and when the balloon main body is inflated, the balloon main body is It is always kept flat.
Accordingly, the liquid injector can be made flat, and the obtained liquid injector can be small in volume, so that it can be easily stored in the patient's pocket, and the liquid injector of the patient can be easily stored. Carrying can be made easy.

  The chemical injector of the present invention is composed of a balloon that always swells flatly and a housing that incorporates this balloon. Even if the housing is flat and easy to carry, the flatness of the housing can be accommodated. Therefore, it is possible to provide a drug solution injector that can be easily carried by a patient.

  According to the method for manufacturing a balloon for medicinal solution injection of the present invention, a balloon main body having a partition for maintaining a flat state at the time of expansion is formed by injection molding or compression molding using an elastic material such as silicon rubber or isoprene rubber. Can be easily obtained.

In particular, according to the method for manufacturing a balloon for injecting a drug solution of the present invention, a balloon for injecting a drug solution having a desired flatness degree can be easily obtained by changing the ratio between the thickness and the width of the partition wall for maintaining the flat state when the balloon is expanded. be able to.

1 shows an embodiment of a balloon for medicinal solution injection according to the present invention, in which (A) is a plan view, (B) is a perspective view with a part cut away, and (C) is a side view with a part cut out. FIG. 4D is a bottom view in which a part of the inflated state is cut out. The other Example of the balloon for chemical | medical solution injection | pouring concerning this invention is shown, (A) is a top view, (B) is a side view of the inflated state, (C) is a bottom view of the inflated state. The further another Example of the balloon for chemical | medical solution injection concerning this invention is shown, (A) is a perspective view, (B) is a top view.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a drug solution injection balloon (hereinafter simply referred to as “balloon”) according to the present invention will be specifically described below with reference to the accompanying drawings.
In addition, this invention is not limited only to a following example, A various improvement can be added in the range which does not change the summary of invention.

In the balloon 1 according to the present invention, as apparent from FIG. 1B, a partition wall 2 is integrally formed from the inner bottom to the vicinity of the upper opening 1b at the center of the inside of the bottomed cylindrical balloon main body 1a. Is.
Such a balloon 1 can be obtained, for example, by injection molding of elastic rubber such as silicon rubber or isoprene rubber.

In the balloon 1 thus obtained, the partition wall 2 is formed from the center of the inner bottom of the cylindrical body to the vicinity of the opening 1b.
Accordingly, the balloon main body 1a cannot be bulged as a whole by the partition wall 2, but the side wall not directly interlocked with the partition wall 2 is pressed to bulge outward, and as a result, the balloon body 1a becomes flat as a whole. . (See Fig. 1 (D))

  The balloon 10 shown in FIG. 2 (A) is arranged in a cylindrical shape with a bottom in a balloon main body 10a with three partitions 11a, 11b, and 11c from the inner bottom to the vicinity of the opening 10b, each with a required interval. It is a thing.

Therefore, when the inside of the balloon 10 is pressurized, the entire balloon 10 swells in a spindle shape in a side view as shown in FIG.
At this time, the partition wall 11a disposed in the center portion also extends somewhat, but does not bulge beyond the expansion width of the balloon main body 10a.

  On the other hand, the partition walls 11b and 11c arranged at the right and left sides of the partition wall 11a are curved outwardly opposite to the partition wall 11a side as is apparent in FIG. Since the wall surface of the balloon main body 10a integrated with 11c does not bulge outward due to the partition walls 11b and 11c, the balloon main body 10a has an elliptical shape as shown in FIG. A flat balloon 10 is obtained.

  The balloon 20 shown in FIG. 3 has a cylindrical upper part including the opening 20b of the balloon main body 20a, but the lower part is formed in a flat shape by making the opposing wall surfaces SW and SW straight. It was formed to become.

Similarly to the balloon 10, the balloon 20 is connected to two partition walls 21 and 21 that connect the side walls SW and SW facing each other in the balloon main body 20a.
Accordingly, when the inside of the balloon 20 is pressurized, the balloon 20 itself swells in a spindle shape since the bulging between the opposing side walls SW and SW is greatly suppressed by the partition walls 21 and 21. Instead, the whole bulges into a more horizontally long elliptical shape.

  In this embodiment, the balloon main body 20a filled with the drug solution has an elliptical cross section, but since the opening 20b is cylindrical, the shapes of the partition walls 21 and 21 are T-shaped. It is what.

  The balloons 1, 10, and 20 are all obtained by injection or compression molding of elastic rubber, but each balloon main body is easier to expand as the radius of curvature is larger or the thickness thereof is thinner. A balloon having a desired flatness can be obtained by changing the ratio of the number and the length (lateral width) for connecting the opposite side walls of the balloon main body.

Since the internal pressure is applied to each of the balloons 1, 10, and 20, the outer skin is preferably at least 0.5 mm or more, and if it is less than 0.5 mm, there is a risk of tearing during pressurization.
Furthermore, the elastic rubber to be used is preferably a durometer type D (Shore D) 20-50, and if it is less than 20, it is too soft to obtain a sufficient pressure for contraction (discharge), so it is not practical. Absent.
On the other hand, 50 or more is too hard to obtain a sufficient extension for expansion. Furthermore, the pressure for contraction (discharge) is too high to be practical.

  In addition, although each chamber formed by the partition contains a medical solution for the patient, each chamber may be filled with the same chemical solution, or each chamber may be filled with a different chemical solution or filled with a different solution. In this case, measures are taken to prevent the liquids from being mixed in the vicinity of the opening.

  Although not particularly shown in the drawings, the chemical injector of the present invention comprises a housing and one of the balloons 1, 10, 20 having the above-described configuration held in the housing.

As described above, the balloon for injecting a chemical solution according to the present invention can be flattened because the balloon itself filled with the chemical solution can be flattened, and the housing for accommodating the balloon can also be flattened so that it is easy to carry. Therefore, the burden on the patient in carrying can be greatly reduced.

The balloon for medicinal solution injection according to the present invention can be easily carried because the balloon for filling the medicinal solution and the housing for housing the balloon can also be made flat, and in addition to the medicinal solution, soft drinks such as water and juice, alcohol It can be used to carry various beverages such as beverages.

1 Balloon for chemical injection 1a Main body of balloon 2 Septum

Claims (9)

While constituting the bottomed balloon main body with elastic material,
In the balloon main body, a partition for partitioning the inside in the vertical direction is integrally formed from the bottom surface portion to the vicinity of the opening portion along the axial direction,
A balloon for a drug injector, wherein the balloon main body is always kept flat by the partition when the balloon main body is inflated . The elastic material is
The balloon for a chemical solution injector according to claim 1, which is isoprene rubber or silicon rubber. The partition is
The balloon for a drug solution injector according to claim 1, wherein a plurality of balloons are provided in the main body of the balloon along the axial direction. The balloon main body is
The drug solution injector balloon according to any one of claims 1 to 3, wherein a plurality of drug solution storage portions formed by the partition walls are filled with different drug solutions. The rubber hardness of the balloon main body is
It is Durometer type D20-50, The balloon for chemical | medical solution injectors in any one of Claims 1-4 characterized by the above-mentioned. The balloon for chemical | medical solution injectors in any one of the said Claims 1-5 is equipped with the housing which has a flat shape, The chemical | medical solution injector characterized by the above-mentioned. A main body of a balloon having a bottomed cylindrical shape in which a partition wall for partitioning the inside is formed from the bottom surface portion to the vicinity of the opening portion along the axial direction and when the partition wall swells, the flat shape is always maintained by the partition wall. A method for manufacturing a balloon for a drug solution injector, wherein the balloon for drug solution injection is configured by integrally molding an elastic rubber material by injection molding or compression molding. The partition is
The method for producing a balloon for a drug solution injector according to claim 7, wherein a plurality of the balloons are arranged at a predetermined interval. The partition is
The method for producing a balloon for a drug solution injector according to claim 7, wherein the flatness of the obtained balloon main body is variable by changing the ratio between the thickness and the width of the partition wall.