JPH07236697A - Transfusion set - Google Patents

Abstract

PURPOSE:To easily and surely perform the connection in the side injection part of a transfusion set, and prevent a hand or finger from being stabbed with a connecting needle when it is pierced. CONSTITUTION:A rubber elastic valve 1 having notches radially formed from the center is installed to a rubber port part 2 on the side injection part of a side injection tube, and a connecting obtuse needle 3 consisting of a tube having a chamfered periphery and a flat needle top end is pressed and inserted to the center of the elastic valve. The insertion of the obtuse needle can be smoothly performed because the notches are provided, and the inner part is airtightly held by the rubber elasticity. There is no possibility that a worker or patient injures his hand or finger by mistake because of the obtuse needle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for connecting a side-injection line to a side-injection tube attached to a main line of an infusion set in the medical field.

[0002]

2. Description of the Related Art In an infusion set used for central parenteral nutrition, a side-injection tube incorporating a rubber port for puncture or a side-injection portion incorporating a three-way stopcock is provided in the middle of the line to connect the side-injection line, BACKGROUND ART Transfusion of fat emulsions, injection solutions such as anti-cancer agents, or blood that are difficult to inject from the main line is performed. Side injection using a three-way stopcock is used as a line for blood transfusion or large volume transfusion in a short time or as a line for measuring the central venous pressure, but the stopcock is complicated and it is extremely difficult to control sterility. Has become. When connecting the side-injection line with the rubber port for puncturing the side-injection tube, 0.51 mm attached to the end of the side-injection line
This is done by puncturing the rubber port with an injection needle with an outer diameter of (25 G) to 1.25 mm (18 G). However, the injection needle has a sharp blade edge, so when the operator is in a hurry, he / she has to panic. The patient may get injured by accidentally puncturing the skin or accidentally pulling out the needle. Also, the needle is thin, so it is not suitable for blood transfusion.

[0003]

In view of the above situation, the inventor has made the needle attached to the end of the side-injection line a blunt needle without a cutting edge to make it safe for both the operator and the patient, and Easily puncture (connect) by attaching an elastic valve with precuts on the rubber port to be projected
The present invention has been completed based on the idea that work can be performed.

[0004]

Thus, according to the present invention, a blunt needle for connection is combined with a side injection pipe equipped with a rubber elastic valve in which a rubber port portion of the side injection portion is provided with a blunt needle insertion notch. An infusion set is provided.

As the side infusion pipe of the infusion set used in the present invention, the side infusion part of FIG. 2 (A) joins obliquely from above, (B) the infusion line joins obliquely from above, and
(C) It can be applied to any of those in which the infusion line joins directly under the rubber port of the side injection part through a short pipe bent at a right angle.

In the present invention, as shown in FIG. 1, the rubber elastic valve 1 of the present invention is attached to the rubber port portion 2 of each of the side injection pipe side injection portions in place of the conventional elastic rubber for needle puncture. ,
The blunt needle 3 for connection is inserted and connected to this elastic valve. The material of the rubber elastic valve has compression self-adhesiveness, such as natural rubber, silicon rubber, nitrile rubber,
Styrene / butadiene rubber, isoprene rubber, fluorine rubber, polyurethane rubber, etc. can be used. Rubber elastic valve,
It is formed by penetrating between the upper and lower surfaces of the center of the columnar body and engraving a plurality of linear notches radially from the center at equal angles. The number of cuts can be 2 (single-letter shape), 3, 4 (cross-shaped), 5, 6 or the like. The length of the cut from the center to the peripheral direction is the radius of the blunt needle x 0.4 to 1.
0 times is preferable, and if the radius of the blunt needle is 0.4 times or less, it is difficult to find the hole position. Also, the initial insertion resistance is large and the blunt needle insertion operability is poor, and it is 1.0 times or more the radius of the blunt needle. Then, the durability of the tension after the insertion of the blunt needle is reduced and the long-term retention of the blunt needle is poor. The outer diameter of the rubber portion of the rubber elastic valve needs to be at least twice as large as the outer diameter of the blunt needle, and is attached to the rubber port portion 2 of the side-injection portion in a slightly compressed state and crimped to the rubber port portion 2 by rubber elasticity. Since the cut is closed by rubber elasticity and cannot be discerned from the outside, it is convenient to attach a dot mark or the like to the center of the surface when inserting the blunt needle.

The blunt connecting needle 3 comprises a needle 4 and a needle base 5,
A needle is a tube or pipe without a cutting edge,
The flat tip is rounded with a beveled outer edge, as shown in FIG.
As shown in (A), stainless steel (SUS 303 or S
US 304), one in which a metal tube made of aluminum is attached to a plastic needle base, and one in which the needle and the needle base are integrally molded with hard plastic as shown in FIG. As the hard plastics, polypropylene, polycarbonate, ABS resin, hard vinyl chloride, etc. can be used. The outer diameter of the needle is 0.5 m
It is m to 5 mm, preferably 1.0 to 3.0 mm.
If it is less than 0.5 mm, it is dangerous because it causes sharpness, and it is difficult to mold the tube, especially in the case of plastics, and if it exceeds 5 mm, when the blunt needle is inserted into the side injection part, the side injection tube lumen This is because the interval between the blunt needle and the blunt needle becomes narrow, the flow of the liquid becomes worse at this portion, and the elasticity of the rubber elastic valve becomes weaker with time. If it is 1.0 mm or more,
No sharpness, no problem in moldability, 3.0 m
This is because if there is m, the inner diameter of the needle required for blood transfusion and measurement of central venous pressure is satisfied.

[0008]

The blunt needle according to the present invention has no sharp edge on the needle and has no sharpness, so there is no risk of puncture even if the patient or operator accidentally touches the finger. Also, since the rubber elastic valve has a notch formed radially from the center to penetrate from the upper surface to the lower surface, a blunt needle having a relatively large diameter can be easily pushed and inserted by providing the notch. After insertion, the elasticity of the elastic rubber holds the blunt needle tightly and keeps it airtight. Furthermore, by setting the diameter of the blunt needle to 5 mm or less, a sufficient peripheral volume to secure the elastic valve is secured, so even if the blunt needle is inserted for a long time, the rubber elasticity does not weaken and airtightness is maintained. To be done.

[0009]

According to the present invention, the blunt needle for connection is a rounded conduit without a cutting edge, and it is not only difficult for a puncture operator, a patient or the like to suffer an accident that the fingertip is injured, but also the needle is inserted. Since the work can be carried out very smoothly and can be held tightly for a long time, it is very useful as a side injection part of an infusion set.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a state in which a blunt needle for connection is inserted into a side injection part.

FIG. 2 is an explanatory view showing a structure of a side injection pipe to which the present invention is applied.

FIG. 3 is a sectional view of a blunt needle for connection according to the present invention.

[Explanation of symbols]

 1 Rubber elastic valve 2 Rubber port 3 Blunt needle for connection 4 Needle 5 Needle base

Claims (2)

[Claims] 1. An infusion set comprising a side blunt tube equipped with a rubber elastic valve having a blunt needle insertion notch formed in a rubber port portion of the side infusion section and a blunt needle for connection. 2. The rubber elastic valve is one in which a plurality of notches are radially provided from the center at an equal angle through the upper and lower surfaces of a central portion of a rubber columnar body, and the blunt needle for connection is a stainless steel pipe. 1. An aluminum pipe or a hard plastic pipe, the outer diameter of which is 0.5 mm to 5 mm, and the cylindrical tip edge is chamfered into a curved surface.
Infusion set described.