WO2022239899A1

WO2022239899A1 - Low dead space syringe tip

Info

Publication number: WO2022239899A1
Application number: PCT/KR2021/006607
Authority: WO
Inventors: 박정건; 김호연; 방만진
Original assignee: 주식회사 에스티에스바이오
Priority date: 2021-05-10
Filing date: 2021-05-27
Publication date: 2022-11-17
Also published as: KR102307817B1

Abstract

The present invention relates to a low dead space syringe tip comprising: a tip body mounted on a needle join tube of a syringe, and accommodated in a needle member when the needle member is coupled to the needle join tube; and a liquid medicine passage formed to penetrate the tip body vertically. According to the present invention, the residual liquid medicine can be effectively minimized by mounting on the needle joint tube of the syringe to simply convert a normal syringe into a low dead space syringe.

Description

Minimal Residual Syringe Tips

The present invention relates to a minimal residual type syringe tip capable of efficiently minimizing the remaining amount of a drug solution in a syringe.

In general, a syringe is a medical device for injecting a drug solution stored therein into a patient's body using a piston principle. It is coupled to a cylinder in which the drug solution can be filled and a needle joint formed at the tip of the cylinder to inject the medicine into a medicine bottle or into the patient's body. It consists of a needle member to be inserted, and a plunger that can be moved back and forth inside the cylinder to inject or introduce the chemical solution into the cylinder.

As illustrated in FIG. 7, even if the plunger 4 is advanced to the tip of the cylinder for injection of the liquid, the liquid contained in the inside of the needle joint pipe 2 and the needle member 3 at the tip of the cylinder is There is a problem of waste of the chemical solution and a problem of inhibiting the injection of an accurate amount of the chemical solution because it is inevitably left without being injected.

That is, in the existing conventional syringe, there is a large dead space in which the chemical solution can remain inside the needle joint tube 2 and the needle member 3, so that an excessive amount of residual drug solution M is generated. There is a problem being

On the other hand, in order to solve the problem of the residual amount of the drug solution as described above, recently, a low dead space (LDS) syringe has been popularized.

This minimum residual type syringe is a syringe for minimizing the residual liquid M, and is a cannula plunger type in which a protrusion is formed on the plunger by deforming the tip of the plunger as shown in (a), as shown in FIG. It can be classified into a syringe and a cannula needle type syringe in which the structure of the needle member is modified to extend the injection needle inward as shown in (b).

By the way, while the conventional minimal residual type syringe as described above has the advantage of reducing the residual liquid (M) compared to conventional injections, it changes the structure of the standardized conventional syringe itself (plunger, needle member). In addition to causing an increase in manufacturing costs, it is difficult to secure a supply plan due to difficulties in manufacturing requirements, and there is a problem in that purchase costs are high.

In addition, in the case of a cannula plunger type syringe, there is even a risk that foreign substances may be mixed into the drug solution due to the protruding portion made of rubber.

The present invention is proposed to solve the above-mentioned problems of the prior art, and an object of the present invention is to minimize residual drug solution efficiently by simply attaching it to a conventional syringe without changing the configuration of the syringe itself at all. To provide a residual type syringe tip.

As a problem solving means of the present invention for achieving the above object,

Disclosed is a minimal residual type syringe tip that is mounted on a needle joint tube of a syringe and includes a tip body accommodated inside the needle member when the needle member is coupled to the needle joint tube, and a drug passage formed to vertically penetrate the tip body. .

Here, the tip body is formed at the upper end of the leg part and the leg part that is inserted into the needle joint tube to reduce the empty space inside the needle joint tube, and when the needle member is coupled to the needle joint tube, the inside of the needle member It may include a body portion that reduces the empty space of the.

In addition, the outer circumferential surface of the body portion may correspond to a virtual extension surface extending upward from the outer circumferential surface of the needle joint tube.

In addition, the outer circumferential surface of the leg portion may correspond to the inner circumferential surface of the needle joint pipe, and the length may correspond to the length of the needle joint pipe.

According to the minimal residual type syringe tip according to the present invention,

It has the advantage of being able to minimize residual liquid by simply converting a general syringe into a minimal residual type syringe by being mounted on a needle joint tube of a syringe.

In particular, since the effect of the minimum residual type can be efficiently achieved by using a conventional syringe as it is, there is an advantage in that it is easy to supply while minimizing the increase in manufacturing cost or purchase cost.

1 is a diagram three-dimensionally illustrating the configuration of a minimal residual type syringe tip according to an embodiment of the present invention;

2 is a cross-sectional view illustrating the configuration of a minimal residual type syringe tip according to an embodiment of the present invention;

3 is a three-dimensional view illustrating a minimal residual type syringe tip and a conventional syringe of the present invention;

Figure 4 is a cross-sectional view illustrating that the syringe tip of the present invention is mounted on the needle joint tube of the syringe,

5 is a cross-sectional view illustrating a state in which a needle member is coupled to a needle joint tube equipped with a syringe tip of the present invention;

6 is a view illustrating that residual liquid is minimized in a syringe equipped with a syringe tip of the present invention;

7 is a diagram illustrating the residual liquid of a conventional syringe,

8 is a diagram illustrating residual liquid of a conventional minimal residual type syringe.

Hereinafter, a preferred embodiment of the minimal residual type syringe tip according to the present invention will be described in detail with reference to the accompanying drawings.

This embodiment is provided to more clearly explain the present invention to those with average knowledge in the art, and the shape, size, number, spacing between elements, etc. of elements in the accompanying drawings provide a clearer explanation. It may be reduced or exaggerated for emphasis, and is not limited to those illustrated in the drawings unless otherwise specifically limited.

In addition, terms indicating directions such as front, back, left, right, up, down, etc. are only used to describe the directions shown and observed in the drawings, and if the directions shown and observed change, these terms may also change. It should be understood that there is

The present invention can efficiently minimize the residual amount of the drug solution without any change to the structure of a conventional syringe by minimizing the dead space of the syringe by being mounted on the needle joint tube of the syringe in which the needle member is not coupled. It relates to a minimal residual type syringe tip.

That is, the present invention relates to a minimal residual type syringe tip that is mounted on a conventional syringe and can easily convert a conventional syringe into a minimal residual type syringe.

For this, a minimal residual type syringe tip according to an embodiment of the present invention is illustrated in FIGS. 1 to 6 .

As illustrated in the drawings, the minimum residual type syringe tip (10, hereinafter, abbreviated as “syringe tip”) according to an embodiment of the present invention includes a tip body 100 and a liquid medicine passage 300. It can be made including.

The tip body 100 may be mounted on the needle joint tube 33 of the syringe in a state where the needle member 35 is not coupled.

And when the needle member 35 is coupled to the needle joint pipe 33, the tip body 100 may be accommodated inside the needle member 35.

In this way, the tip body 100 mounted on the needle joint tube 33 and accommodated inside the needle member 35 occupies the space inside the needle joint tube 33 and the needle member 35 to reduce the empty space of the syringe. The dead space can be minimized.

Here, the needle joint tube 33 means a tube protruding a certain length from the tip of the cylinder 31 of the syringe so that the needle member 35 can be coupled thereto.

As illustrated in the drawings, the tip body 100 as above may specifically include a leg part 110 and a body part 130.

The leg part 110 is a part inserted into the needle joint tube 33 of the syringe.

The leg part 110 may have an outer circumferential surface corresponding to the inner circumferential surface of the needle joint pipe 33, and the length of the leg part 110 may correspond to the length of the needle joint pipe 33.

Here, the term 'corresponds' used in this specification does not mean exactly the same, and may be understood to include the same or a slightly smaller range.

That is, the leg part 110 may have an outer circumference slightly smaller than the inner circumferential surface of the needle joint pipe 33 so as to be inserted into the needle joint pipe 33, and the length is also formed slightly shorter than the length of the needle joint pipe 33. It can be.

This leg portion 110 is inserted into the needle joint pipe 33 to reduce the empty space inside the needle joint pipe 33.

That is, the inside of the needle joint pipe 33 is minimized as the dead space is reduced by the volume occupied by the inserted leg part 110.

The body part 130 is formed at the upper end of the leg part 110, and when the leg part 110 is inserted into the needle joint pipe 33, the upper end of the needle joint pipe 33 is exposed to the outside.

That is, when the leg part 110 is inserted into the needle joint pipe 33, the body portion 130 is positioned outside the upper end of the needle joint pipe 33.

The outer circumferential surface of the body portion 130 may correspond to a virtual extension surface V.F extending upward from the outer circumferential surface of the needle joint tube 33 .

That is, when the leg portion 110 is inserted into the needle joint pipe 33, the outer circumferential surface of the body portion 130 and the outer circumferential surface of the needle joint pipe 33 may be parallel or slightly stepped inward.

When the needle member 35 of the syringe is coupled to the needle joint tube 33, the body portion 130 reduces the empty space inside the needle member 35 while being accommodated into the needle member 35.

That is, the dead space inside the needle member 35 coupled to the needle joint pipe 33 is minimized by being reduced by the volume occupied by the accommodated body portion 130 .

Here, the needle member 35 is composed of an injection needle 35a inserted into a medicine bottle or a patient's body and a needle cap 35b inserted into and coupled to the needle joint tube 33, but the needle cap 35b The shape of the inside may vary depending on the manufacturer.

Accordingly, the shape of the upper end may be formed in various ways according to the inner shape of the body part 130 or the needle cap 35b.

For example, as illustrated in the drawings, when the stepped portion is formed inside the needle cap 35b, the head portion 150 protruding upward in a stepped form may be formed on the top of the body portion 130, and also When the protruding end 35c is formed at the center of the inner upper end of the needle cap 35b, a concave groove 151 may be further formed in the head portion 150 so that the protruding end 35c can be inserted.

The chemical passage 300 is formed to pass through the tip body 100 in the vertical direction.

That is, the chemical passage 300 may be formed to pass through the center from the upper end of the body part 130 to the lower end of the leg part 110 .

The chemical passage 300 serves as a flow path for guiding the chemical solution to pass between the needle member 35 and the cylinder 31 .

The syringe tip 10 of the present invention having the above configuration is manufactured separately from the syringe and can be used by being mounted on the needle joint tube 33 of the syringe.

Since one embodiment of the present invention has been described above, its operation will be briefly reviewed below.

First, the syringe tip 10 of the present invention is mounted on a conventional syringe in which the needle member 35 is not coupled.

As illustrated in FIG. 4 , the syringe tip 10 can be simply mounted on the syringe by inserting the leg portion 110 into the needle joint tube 33 .

In this way, in a state where the syringe tip 10 is mounted on the needle joint tube 33, as illustrated in FIG. 5, the needle member 35 is inserted and coupled to the needle joint tube 33.

When the needle member 35 is coupled with the syringe tip 10 mounted in this way, the empty space inside the needle joint tube 33 is minimized by the leg part 110 and the empty space inside the needle member 35 is By being minimized by the body portion 130, the dead space of the syringe is minimized even though it is a conventional syringe.

That is, by attaching the syringe tip 10 of the present invention to the needle joint tube 33 of the syringe, a conventional syringe can be easily converted into a minimal residual type syringe.

Thereafter, in order to inject the drug solution, the needle member 35 is inserted into a medicine bottle such as a vial, and the plunger 37 is retracted.

Then, while a negative pressure is generated inside the cylinder 31, the drug solution is extracted from the medicine bottle, and the extracted drug solution passes through the medicine solution passage 300 of the syringe tip 10 and is filled into the cylinder 31 of the syringe.

At this time, unlike a conventional syringe in which the liquid is filled in both the inner space of the needle joint tube 33 and the needle member 35, in the case of a syringe equipped with a syringe tip 10, the needle joint tube 33 and the needle The chemical solution is not filled in the space inside the member 35 (or minimized), and only the inside of the cylinder 31 is filled with the chemical solution.

That is, since the syringe tip 10 occupies most of the dead space, the amount of the chemical solution that can be filled in the dead space is minimized.

After filling the cylinder 31 with the drug solution, the needle member 35 is inserted into the patient's body and the plunger 37 is moved forward to inject the drug solution into the patient.

Then, as illustrated in FIG. 6 , since the chemical liquid in the chemical liquid remaining space is minimized, the residual liquid M after injection is minimized.

As described above, the syringe tip of the present invention can be easily converted from a normal syringe into a minimal residual type syringe by being attached to the needle joint tube of the syringe. It is possible to efficiently achieve the effect of the minimum residual type without increasing burden.

Although the preferred embodiments of the present invention have been described in detail above, the technical scope of the present invention is not limited to the contents described in the above-described embodiments and drawings, and may be modified or modified by those skilled in the art. It will be said that the modified equivalent configuration does not deviate from the scope of the technical idea of the present invention.

Claims

A tip body 100 mounted on the needle joint tube 33 of the syringe and accommodated inside the needle member 35 when the needle member 35 is coupled to the needle joint tube 33; and

A minimal residual type syringe tip comprising a drug passage 300 formed to pass through the tip body 100 vertically.
According to claim 1,

The tip body 100,

a leg portion 110 inserted into the needle joint pipe 33 to reduce an empty space inside the needle joint pipe 33;

It is formed at the upper end of the leg part 110, and when the needle member 35 is coupled to the needle joint pipe 33, the body part 130 reduces the empty space inside the needle member 35; Residual syringe tip.
According to claim 2,

The outer circumferential surface of the body portion 130 corresponds to a virtual extension surface (V.F) extending upward from the outer circumferential surface of the needle joint tube 33, the minimal residual type syringe tip.
According to claim 2,

The outer circumferential surface of the leg portion 110 corresponds to the inner circumferential surface of the needle joint tube 33, the minimal residual type syringe tip.
According to claim 2,

The length of the leg portion 110 corresponds to the length of the needle joint tube 33, the minimum residual type syringe tip.