JPH11332956A - Cap for infusion container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent contamination and to prevent the double use of a needle pricking hole and liquid leakage in spite of the presence of a time interval between a mixing and injecting operation and a dosing operation by forming a aperture of a size to allow a needle pricking operation in a pull-off part and sealing this aperture with a peel seal before use. SOLUTION: The pull-off part 4 is formed in the central region enclosed by a bulging part 3 at the top surface of a cap body 1 in such a manner as to be made approximately concentric with the pull ring 5. The aperture 6 which exposes part, for example, the central region, of the top surface of the rubber plug 2 to the outside is formed in this pull-off part 4. The size of the aperture 6 is not restricted unless the size is too large if within a range to allow the needle pricking at the time of mixing and injecting. The aperture 6 is sealed by sealing the top surface of the rubber plug 2 with the peel seal 7 before use, by which the aperture is shut off from the outdoor air. The peal seal 7 is provided with a knob part 8 for peel-off operation. As a result, the outdoor air is shut off before use and the contamination and liquid leakage may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap for an infusion container.

[0002]

2. Description of the Related Art Conventionally, as a cap for an infusion container, a plastic pull-off cap with a built-in rubber stopper, a peel-off cap, and the like have been proposed.

[0003]

[Problems to be solved by the invention] In the medical field,
For example, a mixed injection needle is inserted into the rubber stopper of the cap, and after injecting another drug into the solution in the infusion container, the injection needle of the administration set is inserted into the rubber stopper, and the inner solution is administered to the patient. The needle may be inserted multiple times into the rubber stopper.

[0004] However, the cap of the above type provided conventionally has a structure in which the top surface of the rubber plug is completely exposed at a time by pull-off or peel-off operation at the time of use, and the following points are problematic. .

[0005] A certain period of time may elapse from the end of the co-injection operation to the start of the administration operation. During this elapse of time, the top surface of the rubber stopper may be contaminated with dust or the like. (B) The administration is performed by hanging the infusion container upside down.If the needle of the administration set is inserted again into the insertion hole trace of the mixed injection needle, the previously used insertion hole becomes less self-occluding. Therefore, there is a possibility that a liquid leak may occur.

According to the present invention, even if time elapses between the co-injection operation and the administration operation, the needle insertion operation can be performed using the rubber stopper top surface without contamination, and the needle insertion hole is overlapped. An object of the present invention is to provide a cap for an infusion container, which can be used to prevent liquid leakage during an administration operation.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a plastic pull-off cap having a built-in rubber stopper, wherein an opening is formed in the pull-off portion so as to allow a needle stick operation. The present invention relates to a cap for an infusion container, which is sealed by a peel seal until time.

According to the present invention, a part of the top surface of the rubber plug is first exposed to the outside through the opening by peeling and removing the peel seal, and then the other portion of the top surface of the rubber stopper is removed by removing the pull-off portion. Is exposed to the outside. A part of the top surface of the rubber stopper exposed first is used for needle sticking during the co-injection operation, and another part of the top surface of the rubber stopper exposed next is used for administration operation.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the cap of the present invention is made of plastic,
A cap body 1 composed of outer plugs 1a and 1b is provided, and a rubber plug 2 of the same shape is built in a filled state in an H-shaped space formed between the inner and outer plugs 1a and 1b. Inside,
The lower end surfaces of the outer plugs 1a and 1b are flush with each other, and this lower end surface forms a fusion surface with the upper end surface of the mouth of an infusion container (not shown).

An annular bulge 3 is formed on the top surface of the cap body 1 along the outer periphery, and a central area surrounded by the bulge 3 constitutes a pull-off portion 4. Can be separated and removed by a pull-off operation of the pull ring 5 in accordance with a cut-off portion (not shown), similarly to the conventional pull-off cap.

The pull-off part 4 is preferably a pull ring 5
A hole 6 is provided at a position substantially concentric with the rubber plug 2, and a part of the top surface of the rubber plug 2, for example, a central region can be exposed to the outside in the hole 6. The size of the opening 6 is not particularly limited as long as the needle piercing operation can be performed at the time of co-injection. However, if it is too large, the rubber exposed surface newly provided by detaching and removing the pull-off portion at the time of administration operation is not provided. The diameter of the rubber stopper is usually from 1 to 10 mm, preferably from about 3 to 7 mm. Then, it is appropriately selected and determined.

The opening 6 is sealed with a peel seal 7 in order to shut off the top surface of the rubber plug 2 from outside air until use.
The seal 7 has a knob 8 protruding outward from the cap body 1 to facilitate the peel-off operation. The attachment of the peel seal 7 is as shown in FIG.
For example, it can be performed by providing an upwardly projecting ring ridge 9 (about 0.5 to 3 mm in height) along the periphery of the opening 6 and fusing a peel seal 7 to the ring ridge 9. The easy peelability of the peel seal 7 can be ensured by controlling the fusion temperature.

The top surface of the rubber plug is closed by the pull-off portion 4 except for the opening, and the opening 6 is sealed by the peel seal 7, so that it can be shielded from outside air until it is used.

In use, first, the peel seal 7 is peeled off and the opening 6 is opened. Thus, a part of the top surface of the rubber plug 2, for example, a central region is exposed to the outside through the opening 6, and the co-infusion operation can be performed using the first exposed surface 2a. The exposed surface 2a can be provided with, for example, a circular depression 10 in order to indicate a needle sticking position.
The metal injection needle used for co-injection operation is thin and easy to bend, so if it is accidentally inserted diagonally, trouble such as bending of the injection needle or inability to penetrate the rubber stopper may occur and co-infusion operation may not be possible. However, since the first exposed surface 2a is limited to a relatively narrow range by the opening 6, it is possible to prevent an operational error such as accidentally inserting the co-injection needle obliquely.

When the infusion is administered after the co-injection operation is completed, the pull-off portion 4 is operated to separate the pull-off portion 4 to remove the remaining portion, for example, the outer peripheral portion of the top surface of the rubber stopper 2. It can be newly exposed to the outside. Thus, the administration operation can be performed through the newly exposed top surface, that is, the new second exposed surface 2b which is free of contamination, and since the new exposed surface 2b, the needle insertion hole is used repeatedly. Disappears. The second exposed surface 2b also has the first exposed surface 2
As in the case of a, the display of the needle sticking position (not shown) can be performed.

In the present invention, the cap body 1 is molded from a plastic accepted for medical use by a known molding method, like the conventional cap of this type. Especially,
Polyolefins such as polyethylene and polypropylene
It is preferable because it has excellent moldability and safety is established.

As the above polyethylene, a copolymer with an α-olefin such as propylene, 1-butene and 4-methyl-1-pentene can be used in addition to a homopolymer of ethylene. Further, the copolymer may be linear or branched.

The above polyethylene can be appropriately selected from a wide range irrespective of high density or low density.
Considering flexibility and transparency, it is advantageous to employ a linear low-density polyethylene.

The polypropylene may be a homopolymer or a copolymer with a small amount (generally, 10% by weight or less, preferably 5% by weight or less) of olefins such as ethylene and 1-butene. It is preferable to use a general grade.

In addition to the above polyethylene and polypropylene, polyolefins such as poly 1-butene and poly 4-methyl-pentene can be used as appropriate.

The above-mentioned polyolefin may be used alone or as a mixed resin.

As a material of the rubber stopper 2, a thermoplastic elastomer is adopted, and in some cases, it can be formed integrally with the cap body by applying an insert molding method.

When a thermoplastic elastomer is used, any of styrene, polyolefin, polyurethane, polyester, polyamide and the like can be used. In particular, a styrene-based elastomer, that is, a block copolymer of styrene with butadiene or isoprene (eg, SBS, SIS, etc.) can be suitably used. Styrenic elastomers are hydrogenated (eg, SEBS,
(SEPS) or the like.

The peel seal is not particularly limited as long as it has an easy peeling property. The easy peeling property is realized by, for example, a method such as temperature control at the time of fusion. In particular, if the cap body is made of polyethylene and the peel seal is made of a mixed resin of polyethylene and polypropylene or a mixed resin of polyethylene, polypropylene and thermoplastic elastomer, easily peelable fusion can be easily performed, which is preferable. is there.

[0025]

According to the present invention, the top surface of the rubber stopper can be exposed to the outside in the first time by peeling and removing the peel seal and the second time by removing and removing the pull-off portion. Provides a cap for transfusion that can individually perform needle sticking operation during co-injection and needle sticking operation during administration using the new exposed surface of the rubber stopper top surface, preventing rubber stopper contamination and liquid leakage during administration operation can do.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a longitudinal sectional view showing a peeling and removing state of the peel seal.

FIG. 4 is a longitudinal sectional view showing a state where a pull-off portion is removed by a pull ring operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cap main body 2 Rubber plug 2a 1st exposed surface 2b 2nd exposed surface 3 Swelling part 4 Pull-off part 5 Pull ring 6 Opening hole 7 Peel seal 8 Knob part 9 Ring ridge 10 Depression

Claims (6)

[Claims] 1. A plastic pull-off cap with a built-in rubber stopper, wherein an opening is formed in the pull-off portion in such a size that a needle stick operation is possible, and the opening is sealed by a peel seal until use. A cap for an infusion container characterized by the following. 2. First, a part of the rubber stopper top surface is exposed to the outside through an opening by peeling and removing the peel seal, and then another part of the rubber stopper top surface is exposed to the outside by removing the pull-off portion. 2. The cap according to claim 1, wherein the cap is configured to be used. 3. The cap according to claim 1, wherein a part of the top surface of the rubber stopper exposed to the outside through the opening by peeling and removing the peel seal is displayed with a needle sticking position. . 4. The cap according to claim 1, wherein a needle sticking position is displayed on another portion of the top surface of the rubber plug exposed to the outside by removing the pull-off portion. 5. The cap according to claim 3, wherein the needle piercing position is indicated by a depression. 6. An upwardly projecting ring ridge is formed along the periphery of the opening, and a peel seal is detachably fused to an upper end of the ring ridge.
5. The cap according to any one of 5.