JPH024393A - Engaging method and device for mixing injection needle with simplified lock function - Google Patents

Abstract

PURPOSE:To prevent the falling of a needle and the invasion of unwated bacteria by engaging the needle to the arbitrary position an elastic body-made cap for mixing injection, resolving an elastic body tube which is mounted to a needle fitting part, covering the needle fitting part and a cap fitting part and winding the elastic body tube to the needle fitting part after mixing injection work is finished. CONSTITUTION:A half moon-shaped recessed part 14 and an annular channel 16 are provided in the circumference direction of a needle fitting part 12 in a needle 10 for mixing injection. Then, here, an elastic body tube 18, in which the thickness of both edges parts is partially thick, is wound and stored so that the cross section of the tube can be roll-shaped. After the needle 10 is inserted to the inserting part of tan elastic body cap 22 in a Y-shaped tube 20, the elastic body tube 18 is covered from the engaging part while the tube is re-wound. Then, a thick part in a roll center is mounted to the central part of a half-moon-shaped recessed 14' in the cap 22 or to a channel 16'. When the mixing injection work is finished and the needle is separated from the Y-shaped tube, the elastic body tube 18 is rewound in the roll shape. Then, after the tube is finished to be rewound to the needle fitting part 12, the needle is detached from the cap 22 of the Y-shaped tube 20.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a co-injection needle with a simple lock. More specifically, the present invention relates to a simple method and device for locking a co-injection needle for co-injecting a drug solution into a filter set.

(Prior art 1. Problems to be solved by the invention) When transporting an infusion into the body using an infusion set and a catheter, when newly injecting a new drug solution such as a nutrient solution or a diagnostic solution, 1. Y in the infusion set installed in the middle
A double tube is used.

An elastic cap made of rubber or the like is attached to the end of the Y-tube that is not normally used, to prevent entry of bacteria from the outside and leakage of the infusion fluid inside.

A co-infusion needle is inserted through the elastic cap, and the drug solution is sent to the infusion transport route through the needle and into the body via the catheter.

In this case, the needle is usually only supported by the elastic body of the cap in the insertion section, which is extremely unstable and may fall off due to some kind of shock or the like.

In addition, to prevent this, temporary fixing with adhesive tape is often carried out, but it is not easy to work with, and there is a possibility that germs may enter through this tape, which is extremely unhygienic.

(Means for solving the problem) If the needle for co-injection can be fixed and covered by a simple operation and covered immediately after the needle is inserted into the elastic cap, it will be possible to prevent the needle from falling out, which is unhygienic. It is extremely effective and effective in preventing the invasion of germs.

In order to achieve this objective, the present inventors conducted various studies and searches, and as a result, completed the following invention.

That is, a method for connecting and covering the needle fitting of the co-infusion needle and the elastic cap of the Y-tube with an elastic tube was established with the following configuration.

As shown in Fig. 1, a half-moon-shaped recess (14) and an annular groove (16) are provided in the circumferential direction of the needle attachment part (12) of the mixed injection needle (10), and the wall thickness at both ends is The elastic cap (18), which is partially thickened, is wound and stored in a roll-like cross section (see FIG. 1).

The Y-shaped tube (20) into which this mixed injection needle (10) is inserted
The mounting part (24) of the elastic cap (22) may be a conventionally used one, but it is preferably a half-moon shape in the circumferential direction provided on the needle mounting part (12) as shown in FIG. recess (14') and/or annular groove (to
') is advantageous for locking the needle.

This engagement between the two involves connecting the mixed injection needle (10) to the Y-tube (
20), the elastic tube (18) with the cross section wound into a roll is unwound as shown in FIG. However, the fleshy part at the center of the roll, which was covered from the engaging part, was half of the cap (22).

Complete by attaching it to the center of the recess (14°) or groove (18°) of the monthly installment. (See FIG. 4) This covering and connecting work is extremely simple and quick, and can be operated with one hand by a few skilled people. Moreover, the elasticity of this tube (18) and the half-moon-shaped recess or groove (14,
18, 14°, and 16°), the mutual engagement is fixed, so that they do not easily come off and are safe and reliable.

Also, when you want to remove the needle from the Y-tube after this mixed injection operation, insert the first elastic tube (18) into the half-moon-shaped recess (14°) and/or groove (16°) on the cap side.
To install it, unwind it in a roll-like manner, and after unwinding it to the needle attachment part (12), use the needle in the normal operation to remove the cap (20) of the Y-tube (20).
22).

(Effects of the Invention) According to the method of the present invention, the co-infusion needle does not need to be positioned precisely at the center of the elastic cap, but any suitable position can be selected, and the diameter of the needle attachment part and the cap is Even if the shapes do not match, locking can be achieved without any problem if there is a slight difference in level, the structure is extremely simple and inexpensive, and it is safe for a long time, and can be reused several times if necessary. It is also possible to use

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a co-injection needle attachment portion before installation in which the elastic tube is wound into a roll. FIG. 2 is a sectional view of the elastic cap attachment portion of the Y-shaped tube. FIG. 3 is a cross-sectional view showing one elastic tube being coated while being unwound. FIG. 4 is a sectional view showing a state in which the installation of the mixed injection needle with a simple lock according to the present invention is completed. In the attached drawings, IO... Needle for mixed injection, 12... Needle attachment part. 14.14°--Half-moon-shaped depression, 16.18'...
circular groove. 18...Elastic tube, 2T...Y-shaped tube. 22...Elastic cap. 24... Attachment part of elastic cap.

Claims (8)

[Claims] (1) A method of penetrating a cap made of an elastic material and engaging a needle in order to co-inject a drug solution, the needle being engaged at any position of the co-infusion cap made of an elastic material. and unwinding the elastic tube attached to the needle attachment part of the needle, engaging and locking the needle attachment part and the cap attachment part,
A method for engaging a co-infusion needle with a simple locking mechanism, characterized in that the elastic tube is wound around the needle mounting portion after the co-infusion operation is completed. (2) The method according to claim 1, wherein the elastic tube is made of natural and/or synthetic rubber. (3) The method according to claim 1 or 2, wherein the needle attachment part and/or the cap attachment part has a half-moon-shaped recess, a mixed injection needle with a simple locking mechanism. engagement method. (4) The method according to any one of claims 1 to 3, characterized in that the needle attachment part and/or the cap attachment part further has an annular groove. Engagement method for co-infusion needle with locking mechanism. (5) A device that penetrates a cap made of an elastic material and engages a needle for co-injecting a medicinal solution, which includes an elastic tube that can be wound up and the elastic tube held so as to be openable. An engagement device for a co-infusion needle with a simple locking mechanism, comprising: a needle attachment portion; and a cap attachment portion that releasably receives the elastic tube. (6) An engagement device for a co-injection needle with a simple locking mechanism, wherein the elastic tube is made of natural and/or synthetic rubber. (7) A mixed injection needle with a simple locking mechanism, wherein the device according to claim 5 or 6, wherein the needle attachment part and/or the cap attachment part has a half-moon-shaped recess. engagement device. (8) The device according to any one of claims 5 to 7, characterized in that the needle attachment part and/or the cap attachment part further has an annular groove. Engagement device for mixed injection needle with locking mechanism.