JPH0232296Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a medical injection needle, and is an article used in the medical field.

[Conventional technology]

Previous technology used a single injection needle to inject anticancer drugs into the patient's cancer-affected body tissue at multiple locations.In such cases, the number of injections was increased and each injection There is no other option than to inject the anticancer drug into a single point, and it is not possible to inject the anticancer drug in multiple locations at once.

[Problem that the invention attempts to solve]

With the conventional single injection needle 7 shown in Fig. 2, it is not possible to inject at multiple points in one injection, and the injection is scattered at multiple points.
It is necessary to frequently inject anticancer drugs into the patient's body tissues (not shown) affected by cancer, which is time-consuming.
Since the treatment has to be carried out in a short period of time, there is a problem in that the injections are repeated and scattered into the affected area several times, and the conventional single-piece injection needle has this problem.

[Means to try to solve problems]

As mentioned above, the problem that anticancer drugs cannot be injected into the affected parts of the body at multiple points in a single injection is also due to the unique characteristics of the injection needle. Since the amount of anticancer drug injected in a scattered manner is small per point, it was found that it is possible to inject the anticancer drug into multiple points in a sufficiently scattered manner with a single injection pressure. When a conventional injection needle is changed to a double-needle structure, the needle base for the inner needles with a small tube diameter is installed inside the outer needle, and the cutting edge of the many injection needles is the same as the cutting edge of the outer needle. When a predetermined length is exposed, the needles are given a spring characteristic that spreads outward in a scattering manner and are formed into a bundle, and the bundle of needles is configured as an inner needle through which the drug solution passes, like a double-structured inner injection needle. , a large number of injection needles are housed inside the outer needle. When in use, if a predetermined length of the group of built-in injection needles is exposed from the cutting edge of the outer needle, the tips of the group of injection needles will spread out in a scattered manner, thereby solving the above problem.

〔Example〕

Figures A and B in FIG. 1 are an embodiment of the present invention.
In Figure A, a large number of injection needles 1, 1n having a tube diameter smaller than that of the outer needle 2 are housed inside the outer needle 2, and the plurality of injection needles 1, 1n are inserted from the tip tip 3 of the outer needle 2 at a predetermined position. This is a diagram showing the length exposed. The cutting edges 4, 4n of the plurality of injection needles 1, 1n are fan-shaped so that they can be spread out in a scattering manner, and each needle has a spring-like characteristic of spreading. These multiple injection needles 1, 1n bundles are caulked and assembled to a needle base 5, and are connected to a syringe barrel (not shown) so that a drug solution can pass therethrough and an anticancer drug can be injected. The bundle of injection needles 1 and 1n is stored inside the outer needle 2, and the outer needle 2, which has a puncturing function, is connected to a needle base 6 to improve handling. Figure B shows a state in which the bundles of injection needles 1 and 1n are housed in the outer needle 2 to form a double-needle configuration and can be punctured. As described above, a bundle of a large number of injection needles 1, 1n having a diameter smaller than that of the outer needle 2 is caulked and assembled to the needle base 5 and stored within the outer needle 2.

[Effects of the invention] As mentioned above, the effects of implementing the present invention are extremely good, and the troublesomeness of performing multiple injections one by one into the affected parts of the body using a single injection needle 7 , which was previously required, is eliminated. With a single injection operation, the anticancer drug can be injected into the patient's cancer-affected tissues at multiple points with a single injection using the blade edges 4 and 4n, which spread out in a scattering manner. It has the effect of speeding up the treatment time.

[Brief explanation of drawings]

Figures 1A and 1B are side views of an embodiment of the present invention. FIG. 2: A side view of a previous embodiment. 1 ...Multi-needle injection needle, 1,1n...Multiple injection needles with small tube diameter, 2...Outer needle, 3...Blade tip, 4,
4n...Blade tip, 5...Needle base, 6...Needle base, 7 ...
A conventional single injection needle.

Claims (1)

[Scope of utility model registration request] In a device with multiple injection needle tips on one side, a bundle of injection needles with a tube diameter smaller than that of the outer needle is built into the outer needle of the double-walled injection needle as an inner needle, and A multi-needle injection needle characterized in that the group of cutting edges of the inner needle bundle has a property of expanding in all directions when a predetermined length is exposed from the cutting edge of the outer needle, and these groups are assembled.