JPH09131405A - Needle shaped bottle needle for transfusion set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent slipping off a rubber cock of a transfusion container. SOLUTION: A retaining recess part 5 is formed on the outer circumference part of a needle shaped bottle needle 4. The axis-wise length of the needle shaped bottle needle 4 on a bottom surface 5a of the retaining recess part 5 is set almost the same or slightly larger than the thickness of a rubber cock 2 and the retaining recess part 5 is opened on both sides thereof across the width thereof (in the diametrical direction of the needle-shaped bottle needle). When a force is applied on the needle-shaped bottle needle 4 to pull it off, a step face 6 between the bottom surface 5a of the retaining recess part 5 and the outer circumferential surface on the side of the tip from the retaining recess part 5 of the needle-shaped bottle needle 4 is retained on the end face on the side of the inside of a transfusion container 1 of the rubber cock 2, thus receiving the pulling off force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle bottle needle for an infusion set.

[0002]

6 and 7 show a state in which a rubber stopper c of an infusion container b hung on a stand a is pierced with a needle-type bottle needle e provided at one end of an intermediate tube d to be connected to the infusion container b. Is shown. In the connected state, the infusion container b
The drug solution inside flows into the intermediate tube d through the needle bottle needle e, and then reaches the injection needle g provided at the other end of the intermediate tube d through the drip cylinder f. The symbol h is a clamp for adjusting the drip rate.

[0003]

However, in such a needle-type bottle needle e for infusion set, when the injection needle g is punctured into, for example, a vein and infused into a human body or the like, the patient suffers from anesthesia after operation and pain. If the needle-shaped bottle needle e is pulled out by rolling over or walking in the corridor of a hospital while infusion, the needle-shaped bottle needle e may easily come off from the rubber stopper c. It was This is because, in addition to the fact that the straight needle-shaped bottle needle e is simply pierced through the rubber stopper c, when the needle-shaped bottle needle e moves, the liquid medicine is placed between the needle-shaped bottle needle e and the rubber stopper c. It is thought that this is because it becomes easier for the to penetrate and the frictional force decreases.

The present invention has been made in order to eliminate such inconvenience, and an object of the present invention is to provide a needle bottle needle for an infusion set, which can be made difficult to come off from a rubber stopper of an infusion container.

[0005]

In order to achieve the above object, a needle bottle needle for an infusion set according to claim 1 is provided at one end of an intermediate tube of an infusion set and pierces a rubber stopper of an infusion container. In the needle bottle needle for an infusion set, which is configured to guide the liquid agent in the infusion container to the intermediate tube by connecting to the infusion container, an engaging portion that engages with the rubber stopper when pulled out from the rubber stopper. It is characterized by being provided.

The infusion set needle bottle needle according to a second aspect is characterized in that the locking portion is a locking recess formed on an outer peripheral portion. The infusion set needle bottle needle according to claim 3 is characterized in that the locking recesses are formed at four positions in the circumferential direction.

[0007]

In the invention of claim 1, when a patient or the like moves and a force in the pull-out direction is applied to the needle-type bottle needle pierced by the rubber stopper,
The locking portion provided on the needle-type bottle needle locks the rubber stopper to make it difficult to pull out the needle-type bottle needle. According to a second aspect of the present invention, in addition to the first aspect of the present invention, a locking recess is formed directly on the outer peripheral portion of the needle-type bottle needle to form a locking portion, so that the needle-type bottle needle is provided separately. Avoid the need for a stop.

According to a third aspect of the present invention, in addition to the second aspect of the present invention, the locking recesses are formed at four positions in the circumferential direction to increase the effect of preventing the needle bottle needle from coming off.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory sectional view for explaining a needle bottle needle for an infusion set, which is an example of an embodiment of the present invention, and FIG. 2 is a sectional view taken along line − of FIG. In FIG. 1, a rubber stopper 2 of an infusion container 1 is pierced with a needle bottle needle for infusion set (hereinafter simply referred to as a needle bottle needle) 4 provided at one end of an intermediate tube 3 and is connected to the infusion container 1. It shows the state of being done. In the connected state, the drug solution in the infusion container 1 flows into the intermediate tube 3 through the needle-type bottle needle 4, and then, though not shown, as in the conventional example, the intermediate tube 3 of the intermediate tube 3 passes through the drip tube. It reaches the injection needle provided at the other end.

1 and 2 are provided on the outer peripheral portion of the needle-type bottle needle 4.
As shown in FIG.
° Formed in two places separated from each other. Bottom surface 5 of locking recess 5
The axial length of the needle-type bottle needle 4 of a is approximately the same as or slightly longer than the thickness of the rubber stopper 2, and both sides of the locking recess 5 in the width direction (radial direction of the needle-type bottle needle 4). Is open. Silicon or the like is applied to the outer peripheral portion of the needle-type bottle needle 4 so that the needle-type bottle needle 4 can be smoothly inserted when the rubber stopper 2 is inserted.

Then, from the state shown in FIG.
When a pulling force is applied to the infusion container, the step surface (locking surface) 6 between the bottom surface 5a of the locking recess 5 and the outer peripheral surface 4a of the needle bottle needle 4 on the tip side of the locking recess 5 has the rubber stopper 2. The end face of the inner side of 1 is locked, so that the pulling force is received by the rubber plug 2. In addition, needle type bottle needle 4
In order to form the locking recess 5 on the outer peripheral part of the needle-shaped bottle needle 4, a thread body (not shown) such as a fishing line which is flexible and has high tensile strength is inserted into the needle-shaped bottle needle 4, and in this state, the needle-shaped bottle is closed. It is preferable to sandwich the needle 4 from both sides and compress it to form the locking recess 5, and then to pull out the yarn body.

Here, the bottom surface 5a of the locking recess 5 and the step surface 6
If the angle θ formed by and is about 135 °, the retaining effect is considerably higher than that of the conventional example.
When it becomes °, the retaining effect becomes remarkable. Angle θ is 135
If the angle exceeds 50 °, the retaining effect of the step surface 6 may not be expected so much. On the other hand, if the angle is less than 95 °, it becomes difficult to form the locking concave portion 5 by compression, and therefore the angle θ is 95 ° to 90 °.
135 ° is preferred.

In the needle type bottle needle 4, since the stepped surface 6 of the locking recess 5 is locked to the rubber stopper 2 to receive the pulling force, the patient may not be anesthetized after the operation during the infusion. It is possible to prevent the needle plug 4 from coming off from the rubber stopper 2 even when the patient has a pain and lie down, or when he / she walks in the corridor of the hospital while infusing the liquid and a pulling force is applied to the needle bottle needle 4.

Further, since the locking concave portion 5 is directly formed on the outer peripheral portion of the needle type bottle needle 4 to form the locking portion, the locking portion can be formed as compared with the case where the locking portion is formed by another member. It can be performed easily and at low cost, and the rubber plug 2 can be smoothly pierced. Further, since the locking recesses 5 are formed at two positions in the circumferential direction, the retaining effect can be enhanced, and at the same time, even the thin needle type bottle needle 4 does not affect the shear strength so much that it is difficult to break. be able to.

In the above embodiment, the case where two locking recesses 5 are formed on the outer peripheral portion of the needle-type bottle needle 4 is taken as an example, but the number of locking recesses 5 is not particularly limited. Without Figure 3
As shown in, the locking recess 5 may be formed only at one place,
Further, the locking recessed portions 5 may be formed at three places, or four or more places as shown in FIG. 4 in order to increase the retaining effect.

In the above embodiment, the needle-type bottle needle 4
Although the case where the locking recess 5 is directly formed on the outer peripheral portion of the is taken as an example, the present invention is not limited to this, and for example, as shown in FIG. 5, a tapered cylindrical shape that expands in the pulling direction by metal or synthetic resin or the like. A body 7 (locking portion) is formed and attached to the needle type bottle needle 4, and a bottom surface (locking surface) 7 of the tapered cylindrical body 7 is formed.
The pulling force may be received by engaging a with the end surface of the rubber stopper 2 on the inner side of the infusion container 1.

[0017]

EXAMPLE A conventional needle-type bottle needle e shown in FIG. 7 and a needle-type bottle needle 4 shown in FIG. 3 in which only one engaging recess 5 is formed are pierced and connected to a rubber stopper of an infusion container. In this state, each needle type bottle needle e, 4 was forcibly pulled out, and the force required at that time was measured with a spring. The angle θ between the bottom surface 5a of the locking recess 5 and the step surface 6 was 135 °. In addition, the needle type bottle needles e and 4 had the same outer diameter, length and material, and the rubber stoppers had the same material and the same size.

As a result, the conventional needle-type bottle needle e was 1 kg, and the needle-type bottle needle 4 of the present invention was 1.3 kg, which was 3 compared to the conventional one.
It turned out that 0% was hard to come out.

[0019]

As is apparent from the above description, according to the first aspect of the invention, the locking portion is locked to the rubber stopper to receive the pulling force, so that the patient after the operation is infused during infusion. It is said that it is possible to prevent it from coming off from the rubber stopper even if the needle-shaped bottle needle is pulled out by a pain caused by lack of anesthesia, turning over, or walking in the corridor of the hospital while infusion. The effect is obtained.

According to the invention of claim 2, in addition to the invention of claim 1, since the locking recess is directly formed on the outer peripheral portion of the needle bottle needle to form the locking part, the locking part is formed by a separate member. As compared with the case of doing so, it is possible to obtain an effect that the locking portion can be formed easily and at low cost, and the rubber plug can be pierced smoothly. According to the invention of claim 3, in addition to the invention of claim 2, since the locking recesses are formed at four positions in the circumferential direction, an effect that the retaining effect can be further enhanced can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view for explaining a needle bottle needle for an infusion set, which is an example of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line − in FIG.

FIG. 3 is an explanatory cross-sectional view for explaining a modified example of a locking recess.

FIG. 4 is an explanatory cross-sectional view for explaining a modified example of a locking recess.

FIG. 5 is an explanatory diagram for explaining another embodiment of the present invention.

FIG. 6 is an explanatory diagram for explaining a conventional needle bottle needle for an infusion set.

7 is a partial cross-sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Infusion container 2 ... Rubber stopper 3 ... Intermediate tube 4 ... Needle-type bottle needle 5 ... Locking recess (locking part)

Claims (3)

[Claims] 1. An infusion set, which is provided at one end of an intermediate tube of an infusion set and is adapted to guide a liquid agent in the infusion container to the intermediate tube by piercing a rubber stopper of the infusion container and connecting to the infusion container. A needle-type bottle needle for an infusion set, comprising a locking portion for locking the rubber stopper when the needle-type bottle needle is pulled out from the rubber stopper. 2. The needle bottle needle for an infusion set according to claim 1, wherein the locking portion is a locking recess formed on an outer peripheral portion. 3. The needle bottle needle for an infusion set according to claim 2, wherein the locking recesses are formed at four locations in the circumferential direction.