JP3025843B2 - Injection needle cap - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an injection needle cap, for example, a set component such as a disposable syringe or a prefilled syringe, or an injection needle cap used as a set with an injection needle.

<< Prior Art >> Conventionally, as this kind of injection needle cap, for example, as shown in FIG. 20, there is one formed of a transparent material into a cylindrical shape.
Such an injection needle cap is intended to prevent accidents involving fingers.

<< Problems to be Solved by the Invention >> The air above the injection solution in the syringe of the syringe must be sufficiently expelled before administration in order to avoid an accident due to injection into the patient's body.

This air expelling operation is performed by pushing down the piston with the syringe needle upward with the injection needle cap removed, confirming that the injection solution has come out of the needle tip, and ending. At this time, the injection solution that has come out of the needle tip scatters around or adheres to the needle holder or the tip of the syringe via the injection needle, and is injected and administered by doctors and nurses operating the syringe. Adhesion to the fingers of the elderly and contamination of the surrounding environment are problems.

While the injection solution exerts a drug effect on the patient according to the purpose of use, it may be harmful to persons other than the patient.

In particular, recently, with the dramatic advancement of medicine, a wide variety of medicines with extremely small amounts and high medicinal properties have been rapidly developed and developed.
Some of them have been put into practical use and their handling should be strict. For example, hormone preparations with high activity even in very small amounts,
A protein preparation or a blood preparation developed by biotechnology corresponds to this.

By covering the injection needle 102 with the conventional injection needle cap 101 shown in FIG. 20 and expelling the air in the syringe, it is possible to prevent the injection solution from scattering from the needle tip to the surroundings.

However, the drug solution that has come out of the needle tip travels along the injection needle or cap and adheres to the needle holder or the tip of the syringe, and thus cannot prevent adhesion to the fingers of the injection administrator or contamination of the surrounding environment.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent an injection solution coming out of a syringe needle from contaminating an injection administrator and a surrounding environment when air is expelled from a syringe.

<< Means for Solving the Problems >> In order to solve the above problems, the present invention is configured as follows, for example, as shown in any one of FIGS. 1 to 19.

◎ First invention For example, as shown in FIGS. 1 to 12, at least the peripheral wall portion of the needle tip portion accommodating space 4 for accommodating the needle tip portion 3 of the injection needle 2 of the cap main body 1 can be seen through a transparent or translucent material. In the formed injection cap, a throttle hole 5 for preventing a chemical solution from flowing out is provided in a needle middle housing space 7 for accommodating the needle middle portion 6 of the injection needle 2 of the cap body 1, and the drug solution which has come out of the needle tip 3 is captured. The liquid-capturing means A is constituted by the throttle hole 5.

◎ Second invention As shown in FIGS. 13 to 15, for example, at least the peripheral wall portion of the needle tip accommodating space 4 accommodating the needle tip 3 of the injection needle 2 of the cap main body 1 can be seen through a transparent or translucent material. In the formed injection cap, a drug solution outflow preventing partition member 11 is provided in a needle mid-portion accommodating space 7 for accommodating the needle mid-portion 6 of the injection needle 2 of the cap main body 1. The needle tip 3 is made of a pierceable material.
The liquid medicine catching means A for catching the liquid medicine coming out of the apparatus is characterized by comprising the above-mentioned partition member 11.

Third Invention For example, as shown in FIGS. 16 to 19, at least the peripheral wall portion of the needle tip housing space 4 for housing the needle tip 3 of the injection needle 2 of the cap main body 1 can be seen through a transparent or translucent material. In the formed injection cap, an inner cap 15 for accommodating at least the needle tip 3 of the injection needle 2 is provided in the cap body 1,
Chemical solution capturing means A for capturing the chemical solution coming out of the needle tip 3
Is provided on the inner cap 15.

◎ Fourth invention For example, as shown in FIG.
The upper end portion 17 and the lower end portion 18 of the inner cap 16 are provided with the chemical solution capturing means A, respectively.

<< Operation >> The injection needle cap of the present invention is used by putting it on a syringe in advance, removing the air after injecting air from the injection solution in the syringe with the syringe facing upward, and removing it as follows. I do.

1st invention (refer to FIGS. 1 to 12) At the time of expulsion of the air above the injection solution in the syringe of the syringe, the injection solution coming out of the needle tip is caused by the viscosity or surface tension, and the drug solution capturing means A constituted by the throttle hole 5 is formed. And is caught in the needle tip accommodating space 4 in the cap body 1.

Thereafter, the injection needle cap may be removed while the syringe is facing upward, but it is preferable to remove the injection needle cap after turning the injection needle sideways or downward in order to prevent leakage of the injection solution.

The second invention (see FIGS. 13 to 15) The injection solution is blocked by the drug solution capturing means A constituted by the partition member 11, and is captured in the needle tip housing space 4.

When removing the injection needle cap, the injection liquid attached to the outer surface of the needle tip is wiped off by the partition member 11.

◎ Third invention (refer to FIGS. 16 to 19) The injection solution is a chemical solution capturing means A provided on the inner cap 15.
Is captured by

The fourth invention (see FIG. 19) The injection solution is captured by the drug solution capturing means A provided at the upper end 17 and the lower end 18 of the inner cap 16 respectively.

<< Examples >> Examples of the present invention will be described with reference to the drawings.

1 to 19 are sectional views in use showing several different embodiments of the injection needle cap.

At least the peripheral wall portion of the needle tip housing space 4 that houses the needle tip 3 of the injection needle 2 of the cap body 1 is formed of a transparent or translucent material so as to be transparent, and a drug solution that captures the drug solution that has come out of the needle tip 3 The capturing means A is provided inside the cap body 1.

1 to 12 are provided with a throttle hole 5 as a chemical solution capturing means A.

That is, a throttle hole 5 for preventing a drug solution from flowing out is provided in a needle midway housing space 7 for housing the needle midway 6 of the injection needle 2 of the cap body 1.

The cap body 1 shown in FIG. 1 and FIG.
Are provided integrally.

The cap body 1 shown in FIG. 3 has an upper part 1b fitted and fixed to the outside of the aperture 5 provided in the lower part 1a.

The cap body 1 shown in FIG. 4 is formed by fixing the lower part 1a outside the aperture 5 provided in the upper part 1b.

The cap body 1 shown in FIGS. 5 and 6 is formed by fixing the upper part 1b outside the lower part 1a having the throttle hole 5 in the middle. When a large amount of drug solution flows out from the injection needle 2,
Since it accumulates in the gap 19 between the lower portions 1b and 1a, it is reliably captured.

In the cap body 1 shown in FIG. 7, an intermediate portion 1c having a throttle hole 5 inside is fixed. In this case as well, as in the previous example, it is reliably captured by the gap 19.

The cap body 1 shown in FIG. 8 includes upper and lower parts 1b and 1a and an intermediate part 1c, and a lower part of the intermediate part 1c is bent inward and upward to form a throttle hole 5.

In this case as well, the gap 19 formed by the bending surely captures.

The cap body 1 shown in FIG. 9 and FIG.
A squeezing hole 5 is formed near the needle tip 3 of the needle midway 6 at the lower end of the upper part 1b fixed inside the inside.

The cap body 1 shown in FIG. 11 is provided with a throttle hole 5 near the base 8 of the needle middle part 6 at the lower end of the upper part 1b fixed inside the lower part 1a.
Is formed.

The cap body 1 shown in FIG.
Is fixed.

FIGS. 13 to 15 show a chemical solution capturing means A made of a material through which the injection needle 2 can penetrate, such as rubber, a closed cell (for example, styrene foam), a hydrophobic filter, etc., for preventing the chemical solution from flowing out. A partition member 11 is provided.

That is, an intermediate partition member for preventing the outflow of a drug solution is provided in a needle middle housing space 7 for housing the needle middle 6 of the injection needle 2 of the cap body 1.
The partition member 1 is formed of a material through which the injection needle 2 can penetrate.

In the cap body 1 shown in FIG. 13, a partition member 11 is fixed to an inner middle portion.

In the cap body 1 shown in FIG. 14, a partition member 11 is fixed to the lower surface of a step portion 12 formed inside the middle.

In the cap body 1 shown in FIG. 15, a partition member 11 is fixed to the lower surface of the throttle hole 5 formed in the intermediate portion.

16 to 19, an inner cap 15 for accommodating at least the needle tip 3 of the injection needle 2 is provided in the cap main body 1, and a drug solution capturing means A is provided in the inner cap 15.

That is, the cap body 1 shown in FIG. 16 has an inner cap 15 having the aperture 5 therein.

In the cap body 1 shown in FIG. 17, an inner cap 15 having a throttle hole 5 is fixed to an upper inner surface of the cap body.

In the cap body 1 shown in FIG. 18, an inner cap 15 having a throttle hole 5 is fixed to the upper inner periphery.

In the one shown in FIG. 19, a medicine outflow prevention member through which the injection needle 2 can penetrate is inserted into the upper end 17 and the lower end 18 of the inner cap 16.

At the time of use, with the cap body 1 and the inner caps 15 and 16 fitted in the injection needle 2, air is expelled from the syringe to confirm that the drug solution flows out of the needle tip 3, and then the injection needle Cap body 1 from 2, inner caps 15 and 16
Is removed, the chemicals are captured by the respective chemicals capturing means A.

The inner cap 16 shown in FIG. 19 does not necessarily need to be removed from the injection needle 2 at the time of use. In this case, the needle tip 3 may penetrate the upper end 17 and the inner cap 16 may be injected into the injection needle 2 in a skewered state.

<< Effects of the Invention >> The present invention is configured and operated as described above, and has the following effects.

I. At the time of expulsion of air above the injection solution in the syringe of the syringe,
The injection solution that has come out of the needle tip is trapped in the needle tip receiving space in the cap body by the throttle hole, the partition member, or the drug solution trapping means of the inner cap.

This prevents the injection solution from traveling along the inner surface of the injection needle or the cap main body and adhering to the needle holder or the distal end of the syringe, thereby preventing the injection administrator and the surrounding environment from being contaminated.

B. In addition, since the above contamination prevention is performed using a syringe needle cap, the implementation cost can be reduced by the necessity of the dedicated device compared with the case of using a dedicated device for preventing contamination, and the handling is also easy. Can be simplified.

[Brief description of the drawings]

1 to 19 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of one embodiment, FIG. 2 is a sectional view of a cap body taken along line BB of FIG. 1, and FIG. 5 to FIG. 5 are longitudinal sectional views of other different embodiments, FIG. 6 is a sectional view of the cap body taken along the line CC of FIG. 5, and FIGS. 7 to 9 are other different embodiments. FIG. 10 is a sectional view of the cap body taken along the line DD in FIG. 9, and FIGS. 11 to 19 are longitudinal sectional views of other different embodiments. FIG. 20 is a longitudinal sectional view of a conventional example. 1 ... cap body, 2 ... injection needle, 3 ... needle tip, 4
... Needle tip accommodation space, 5...
7 ... needle intermediate space, 11 ... partition member, 13 ...
Needle hole open end, 15 …… Inner cap, 16 …… Inner cap, 17
…… the upper end of the inner cap, 18 …… the lower end of the inner cap,
A ... Medicinal liquid capturing means.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61M 5/32

Claims (4)

(57) [Claims] 1. A needle tip housing space (4) for housing at least a needle tip (3) of an injection needle (2) of a cap body (1).
In the injection cap, the peripheral wall portion of which is formed of a transparent or translucent material so as to be able to be seen through, the needle body (6) for accommodating the needle part (6) of the injection needle (2) of the cap body (1). An injection needle provided with a throttle hole (5) for preventing a drug solution from flowing out, and a drug solution capturing means (A) for capturing a drug solution coming out of the needle tip (3) is constituted by the throttle hole (5). cap. 2. A needle tip housing space (4) for housing at least the needle tip (3) of the injection needle (2) of the cap body (1).
In the injection cap, the peripheral wall portion of which is formed of a transparent or translucent material so as to be able to be seen through, a needle intermediate portion housing space (7) for accommodating the needle intermediate portion (6) of the injection needle (2) of the cap body (1). A chemical liquid outflow preventing partition member (11) is provided. The partition member (11) is formed of a material through which the injection needle (2) can penetrate, and captures the liquid medicine that has come out of the needle tip (3). An injection needle cap, wherein the drug solution capturing means (A) is constituted by the above-mentioned partition member (11). 3. A needle tip housing space (4) for housing at least the needle tip (3) of the injection needle (2) of the cap body (1).
An inner cap (15) for accommodating at least the needle tip (3) of the injection needle (2) in the cap body (1), wherein the inner wall of the injection cap is made transparent or translucent so as to be transparent. An injection needle cap, wherein a drug solution capturing means (A) for capturing a drug solution coming out of the needle tip (3) is provided on the inner cap (15). 4. The injection needle cap according to claim 3, wherein the chemical solution capturing means (A) is provided at an upper end (17) and a lower end (18) of the inner cap (15).