KR20180110514A - Iv catheter assembly - Google Patents

Abstract

An intravenous catheter assembly according to an embodiment of the present invention comprises: a needle body having a main needle having a predetermined length at a front end thereof; a catheter including a hollow catheter body and a catheter tube communicating with a front end of the catheter body and passing a part of the main needle into the inside; a three-way valve, as a hollow path opened in the three directions for input or discharge of a fluid, including a first valve body integrally coupled to a rear end of the catheter body and a second valve body branched horizontally from the first valve body, and a cap detachably coupled to an end of the second valve body.

Description

[0001] IV CATHETER ASSEMBLY [0002]

The present invention relates to a catheter assembly, and more particularly, to an intravenous catheter assembly for collecting a blood sample so that the catheter is not exposed to contamination while fixed to the blood vessel.

The present invention relates to catheter assemblies, and more particularly to catheters for use in venous vessels. An intravenous catheter is an elongated tube that is inserted into a user's vein to drain blood, or to introduce drugs or fluids.

Such a conventional intravenous catheter requires a process of collecting a blood sample before connecting the catheter to the infusion tube. Such a catheter is designed to move easily in the external or internal space of the affected part, and attaches the catheter to the skin with a tape or the like, but the catheter can move during the sampling process because the blood sampling proceeds without the catheter being properly fixed. At this time, the possibility of contamination of the catheter may increase.

In addition, a conventional intravenous catheter may have to connect the fluid tube again after blood sampling, and thereafter inconvenience and time delay may have to be taken to transfer the obtained blood sample to a separate container. Blood samples obtained in this process may increase the likelihood of coagulation. In addition, contamination may occur during the transfer of the sampled blood to a separate container.

Therefore, it is necessary to develop a catheter that can not only take a blood sample by effectively fixing the catheter to the skin, but also can inject fluid such as drug or liquid.

A related prior art is Korean Patent Laid-Open Publication No. 10-2015-7022848 (entitled Catheter Assembly, published on Nov. 11, 2015).

An embodiment of the present invention provides an intravenous catheter assembly for taking blood sampling or injecting a drug directly in the state of connecting a fluid tube as the 3-way valve is attached to the catheter.

The problems to be solved by the present invention are not limited to the above-mentioned problem (s), and another problem (s) not mentioned can be clearly understood by those skilled in the art from the following description.

The intravenous catheter assembly according to an embodiment of the present invention includes a needle having a main needle having a predetermined length at its front end, a hollow catheter body, and a catheter tube communicating with a front end of the catheter body, A first valve body integrally coupled to a rear end of the catheter body, and a second valve body integrally coupled to the second valve body in a horizontal direction from the first valve body, Way valve including a second valve body that branches toward the second valve body, and a cap detachably coupled to an end of the second valve body.

In addition, the catheter tube according to an embodiment of the present invention can guide and fix a part of the main needle passing through the first valve body and the catheter body.

The first valve body according to an embodiment of the present invention includes a first opening formed at one end thereof to engage with a rear end of the catheter body and a second opening formed at the other end of the first valve body to correspond to the first opening. And the second valve body may include a third opening formed at an end thereof for engaging with the cap.

In addition, the second opening according to an embodiment of the present invention can be combined with a tool for injecting or discharging the fluid into the interior of the three-way valve.

Further, the second opening according to an embodiment of the present invention may be engageable with the intravenous main use connector.

The three-way valve according to an embodiment of the present invention is characterized in that both ends of the three-way valve are perpendicular to the first valve body and the second valve body at the intersection of the first valve body and the second valve body, And a third valve body that is formed by extending a predetermined length in a direction of the first valve body.

In addition, the third valve body according to an embodiment of the present invention may include a fourth opening formed at an upper end of the third valve body.

Further, the 3-way valve according to an embodiment of the present invention may further include a lever that is partly rotatable by being inserted into the third valve body to selectively control the injection or discharge of the fluid .

According to an embodiment of the present invention, the lever includes a first lever body inserted into the third valve body through the fourth opening, and a second lever body provided on the upper portion of the first lever body, And a second lever body having a T-shaped protrusion formed thereon.

In addition, a through hole may be formed in the periphery of the first lever body according to an embodiment of the present invention at a position corresponding to the direction in which the second lever body protrudes.

In addition, the respective diameters of the through holes according to an embodiment of the present invention may be equal to each other to uniformly introduce or discharge the fluid.

In addition, the cap according to an embodiment of the present invention includes a cap body integrally coupled to the third opening and having a sub-needle at an end thereof, and a cap body coupled to an end of the cap body to seal the sub- . ≪ / RTI >

In addition, the sub-needle according to an embodiment of the present invention may surround the elastic member having an elastic force and may be exposed to the outside as the elastic member is pushed to the rear end by the elastic force.

In addition, the sub-needle according to an embodiment of the present invention may be combined with a tool for injecting or discharging the fluid into the three-way valve as the sub-needle is exposed to the outside.

In addition, the sub needles according to an embodiment of the present invention can be combined with the blood sample storage container.

The details of other embodiments are included in the detailed description and the accompanying drawings.

According to one embodiment of the present invention, a 3-way valve is mounted on a catheter, so that a blood sample can be collected directly or a drug can be injected in a state in which the liquid pipe is connected.

According to an embodiment of the present invention, since a vein blood vessel is secured by a catheter equipped with a 3-way valve, and the fluid is directly connected to the blood vessel, the catheter is stably fixed to prevent contamination due to movement of the catheter .

According to one embodiment of the present invention, a blood sample can be collected and stored in a sample storage container through a 3-way valve mounted on the catheter, thereby reducing the possibility of blood coagulation or blood contamination .

1 is an assembled perspective view illustrating an intravenous catheter assembly in accordance with an embodiment of the present invention.
Figure 2 is an exploded perspective view of the intravenous catheter assembly of Figure 1;
3 is a view showing a needle body in an embodiment of the present invention.
Figure 4 shows a catheter in one embodiment of the invention.
5 is a diagram illustrating a 3-way valve in one embodiment of the present invention.
6A and 6B are diagrams for explaining a coupling between a lever and a 3-way valve in an embodiment of the present invention.
7A and 7B are views showing a cap in an embodiment of the present invention.
FIGS. 7C and 7D are diagrams for explaining the coupling between the sub-needle and the blood sample storage container exposed to the outside in one embodiment of the present invention. FIG.
8A and 8B are diagrams for explaining the coupling between the plug and the 3-way valve.
9A and 9B are views for explaining the coupling between the stopper body and the stopper cap.
10A to 10F are diagrams for explaining a procedure in which an intravenous catheter assembly is used for collecting a blood sample or injecting a drug or a fluid, in an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and / or features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of an intravenous catheter assembly according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the intravenous catheter assembly of FIG. 1, and FIG. 3 is a cross- 4 is a view illustrating a catheter 200 according to an embodiment of the present invention. FIG. 5 is a view showing a three-way manner in an embodiment of the present invention. 6A and 6B are diagrams for explaining the coupling between the lever 340 and the 3-way valve 300 in one embodiment of the present invention 7A and 7B are views showing a cap 400 in an embodiment of the present invention.

1 and 2, an intravenous catheter assembly according to an embodiment of the present invention includes a needle 100, a catheter 200, a 3-way valve 300, and a cap 400 .

3, the needle body 100 has a main needle 110 having a sharp needle tip at its front end. The main needle 110 may be partially inserted into the vein by piercing the skin of the user through the needle tip. The main needle 110 may have a predetermined length and may have a length enough to pass through the catheter 200 and the 3-way valve 300 to be described later.

The catheter 200 includes a catheter body 210 and a catheter tube 220 in the present invention as a thin tube of rubber or metal to be inserted into a user's blood vessel, particularly intravenously, to allow blood to be drained.

4, the catheter body 210 has a hollow so that the interior is empty, and the catheter tube 220 is formed in communication with the front end of the catheter body 210. [ A part of the main needle 110 can pass through the catheter body 210 and the catheter tube 220 and the catheter 200 in which the main needle 110 is passed is inserted into the vein of the user, . At this time, the catheter tube 220 can guide a part of the main needle 110 passing through the catheter body 210 and fix it so as not to move. For this, the diameter of the catheter tube 220 is preferably larger than the diameter of the main needle 110, but smaller than the diameter of the catheter body 210.

The three-way valve 300 is a hollow passage opened in three directions for introducing drugs or liquids or discharging blood. The three-way valve 300 is connected to the catheter 200 to supply a fluid such as drug, It can move inside. Hereinafter, the above-mentioned medicines, liquids, blood, etc. will be described as unified with fluids.

5, a three-way valve 300 may include a first valve body 310, a second valve body 320, and a third valve body 330. The first valve body 310, the second valve body 320,

The first valve body 310 is integrally coupled to the rear end of the catheter body 210. That is, the first valve body 310 may be coupled to the rear end of the catheter body 210 in a direction coinciding with the longitudinal direction of the catheter 200. At both ends of the first valve body 310, a first opening 302 and a second opening 304 may be provided. The first opening 302 may be formed at one end of the first valve body 310 and may engage with the rear end of the catheter body 210 and the second opening 304 may be coupled to the first opening 302, And may be formed at the other end of the valve body 310. For reference, the second opening 304 is formed by a tool (not shown) for introducing or discharging fluid into the interior of the three-way valve 300 while the first opening 302 is engaged with the rear end of the catheter body 210 Lt; / RTI > For example, the second opening 304 can be injected intravenously with liquid, nutrient, etc. as it is combined with the intravenous line connector (IV line).

The second valve body 320 branches from the first valve body 310 in the horizontal direction. That is, the second valve body 320 may have a predetermined length in a direction orthogonal to the longitudinal direction of the catheter 200, and may extend. The second valve body 320 may be provided with a third opening 306, which is an open hole. The third opening 306 is formed at the end of the second valve body 320 and can be engaged with the cap 400 to be described later. The coupling between the plug 400 and the 3-way valve 300 will be described in more detail with reference to FIGS. 8A and 8B.

The third valve body 330 may be implemented at a position where the second valve body 320 branches from the first valve body 310. 6A and 6B, the third valve body 330 includes a first valve body 310 and a second valve body 320, both ends of which intersect at a point where the first valve body 310 and the second valve body 320 intersect, And may have a predetermined length in a direction perpendicular to the valve body 320. The third valve body 330 may communicate with the first valve body 310 and the second valve body 320. The third valve body 330 may be provided with a fourth opening 308, which is an open hole. The fourth opening 308 is formed at the upper end of the third valve body 330 and can be engaged with a lever 340 to be described later.

Meanwhile, the 3-way valve 300 may include a lever 340 for controlling the movement of the fluid when the fluid is introduced into or discharged from the interior. The lever 340 may be partly inserted into the third valve body 330 and pivoted to selectively control the injection or discharge of the fluid. The lever 340 includes a first lever body 342 in the form of a cylinder to be inserted into the third valve body 330 and a second lever body 344 in the form of a handle for rotating the lever 340 Lt; / RTI >

6A and 6B, the first lever body 342 may be inserted into the interior of the third valve body 330 through the fourth opening 308. For this, the diameter of the first lever body 342 is preferably smaller than the diameter of the fourth opening 308. The second lever body 344 is provided on the upper portion of the first lever body 342 and may protrude in three directions. Here, the second lever body 344 may be formed in a 'T' shape or a '' shape so that the user can easily rotate the body by hand.

At this time, the first lever body 342 may be provided with a through hole 343, which is an open hole of a predetermined size, around the periphery of the first lever body 342. The through hole 343 is formed at a position corresponding to the direction in which the second lever body 344 protrudes along the outer periphery of the first lever body 342. In the present embodiment, three through holes 343 are provided in total do. The through hole 343 can be connected to or blocked from the communication portion between the first valve body 310 and the third valve body 330 by inserting the lever 340 into the third valve body 330 and turning. Accordingly, the intravenous catheter assembly can be introduced or withdrawn through the through-hole 343 in the three-way valve 300. Here, the respective diameters of the through-holes 343 are preferably equal to each other so that the fluid is introduced or discharged uniformly. The description of the introduction or discharge of the fluid in accordance with the rotation of the lever 340 will be described in more detail with reference to Figs. 10A to 10F.

The cap 400 is a member for collecting a blood sample or injecting a drug through a 3-way valve 300 and can be combined with a tool for injecting or discharging fluid. 7A and 7B, the stopper 400 is detachably coupled to the end of the first valve body 320 and may include a stopper body 410 and a stopper cap 420.

The stopper body 410 is integrally coupled to the third opening 306. That is, the stopper body 410 may be coupled to the third opening 306 in a direction coinciding with the longitudinal direction of the first valve body 320. Accordingly, the stopper body 410 can communicate with the second valve body 320 through the third opening 306 to allow the drug to be introduced into the three-way valve 300.

The stopper body 410 may be provided with a sub needle 412 having a predetermined length at an end thereof. The sub needle 412 is directly coupled to a tool for inputting or discharging the fluid. For this purpose, the sub needle 412 may be embodied such that an elastic member 414 having elasticity is wrapped around the elastic member 414. That is, the sub-needle 412 can be exposed to the outside as the elastic member 414 is pushed to the rear end by the elastic force, and the exposed portion can be combined with a tool for injecting or discharging the fluid. For example, as the sub-needle 412 is associated with the blood sample storage container, the blood sample delivered via the 3-way valve 300 may be drained into the container. 7C, the sub-needle 412 may be configured to allow the elastic member 414 to be pushed to the rear end of the stopper body 410 by a user or a specific tool, Can be combined with the tool (b). 7D, the sub-needle 412 is pushed to the rear end of the stopper body 410 by the tool b for inputting or discharging the fluid, and at the same time, Can be achieved. 7C and 7D are diagrams for explaining the coupling between the sub-needle 412 and the blood sample storage container exposed to the outside in one embodiment of the present invention.

The cap lid 420 is coupled to the end of the stopper body 410. The stopper cap 420 may be engaged with the stopper body 410 to seal the sub-needle 412 when the operation of injecting or discharging the fluid is not performed.

8A and 8B, a description will be given of the coupling between the plug 400 and the 3-way valve 300, and the plug body 410 and the plug cap 420 will be described with reference to FIGS. 9A and 9B, .

8A and 8B, the stopper 400 may be detached from the second valve body 320 in a state where the stopper cap 420 is coupled to the stopper body 410. As shown in FIG. 8A, The stopper 400 may be detached from the first valve body 320 by rotating the stopper body 410 in one direction.

9A and 9B, the stopper 400 may be detached from the stopper body 410 by only the stopper lid 420, as shown in FIG. 9A, And can be detached from the stopper body 410 by rotating in one direction.

Although the present embodiment is described as applying the fitting structure in the coupling between the plug 400 and the three-way valve 300 and the coupling between the plug body 410 and the plug cap 420, In addition, various coupling structures such as screw coupling, magnet coupling and the like may be applied.

8A and 8B are diagrams for explaining the coupling between the plug and the 3-way valve, and FIGS. 9A and 9B are views for explaining the coupling between the plug body and the plug cap .

Hereinafter, with reference to FIGS. 1, 2, and 10A to 10F, a description will be given of a process in which the intravenous catheter 200 assembly of the present invention is used for collecting a blood sample or injecting drugs or liquids. 10A to 10F are diagrams for explaining a procedure in which an intravenous catheter assembly is used for collecting a blood sample or injecting a drug or a fluid, in an embodiment of the present invention.

Referring to FIGS. 1, 2 and 10A, when the main needle 110 of the needle assembly 100 is coupled to the interior of the catheter 200, the catheter tube 220 and the main needle 110 are inserted into the body Lt; RTI ID = 0.0 > intravenous < / RTI > Here, the second lever body 344 of the lever 340 moves the fluid only to the first valve body 310 in the three-way valve 300 and the fluid moves to the second valve body 320 . In other words, the lever 340 can be pivoted so that the through-hole 343 provided in the first lever body 342 is positioned in a direction other than the direction in which the second valve body 320 is located.

Next, referring to FIGS. 1, 2 and 10B, the main needle 110 may be removed from the catheter tube 220 inserted intravenously by a line operation to collect a blood sample. At this time, the stopper 400 may remain coupled to the second valve body 320 of the three-way valve 300.

Next, referring to FIGS. 1, 2, and 10C, the fluid pipe a is coupled to the second opening 304 provided in the first valve body 310 of the three-way valve 300, . Accordingly, the catheter 200 inserted in the vein can be fixed so as not to move, before taking a blood sample. The second lever body 344 of the lever 340 is rotated in the clockwise direction from the position of the second lever body 344 shown in FIG. 10A in a state where the liquid pipe a is coupled to the second opening 304 As shown in FIG. Thus, the 3-way valve 300 can block the transfer of the liquid from the liquid pipe (a).

1, 2 and 10D, a stopper cap 420 is detached from a stopper body 410 coupled to a second valve body 320 of a three-way valve 300 .

Next, referring to FIGS. 1, 2 and 10E, a blood sample storage container (b) for collecting a blood sample can be coupled to the sub needle 412 provided in the stopper body 410. That is, blood is transferred to and stored in the blood sample storage container (b) through the sub-needle (412) exposed to the outside while pushing the elastic member (414) surrounding the sub needle (412) . Thereby, it is not necessary to transfer the blood sample obtained from the catheter 200 to a separate container, and the possibility that the blood is contaminated can be remarkably reduced.

Next, referring to FIGS. 1, 2 and 10f, when a drug, nutrient or other fluid is injected into the blood vessel in addition to the operation of collecting a blood sample, the entire plug 400 is connected to a 3-way valve (C) for dispensing medicines, nutrients or other fluids may be coupled to the second valve body 320 by separating the second valve body 320 from the second valve body 320 of the second valve body 300. For example, a drug, nutrient or other fluid injector (c) may be coupled to the second valve body 320. For example, when the drug, nutrient or other fluid is injected into the blood vessel as described above, the second lever body 344 is rotated in the same manner as in Figs. 10C to 10E to block the fluid from the fluid tube (a) The angle can be maintained.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

100: Needle
110: main needle
200: catheter
210: catheter body
220: catheter tube
300: 3-way valve
302: first opening
304: second opening
306: third opening
308: fourth opening
310: first valve body
320: second valve body
330: third valve body
340: lever
342: first lever body
343: Through hole
344: Second lever body
400: Plug
410: plug body
412: Sub needle
414: elastic member
420: cap cover

Claims (15)

A needle body provided with a main needle having a predetermined length at a front end thereof;
A catheter for passing a portion of the main needle into the interior, the catheter body having a hollow catheter body and a catheter tube communicating with the front end of the catheter body;
A first valve body integrally coupled to a rear end of the catheter body and a second valve body branched horizontally from the first valve body, A 3-way valve including a valve; And
A valve body detachably coupled to an end of the second valve body,
Gt; catheter < / RTI > assembly.
The method according to claim 1,
The catheter tube
And guides and secures a portion of the main needle passed through the first valve body and the catheter body.
The method according to claim 1,
The first valve body
A first opening formed at one end for engaging with a rear end of the catheter body; And
And a second opening formed at the other end of the first valve body to correspond to the first opening,
The second valve body
And a third opening formed at the end for engaging the stopper.
The method of claim 3,
The second opening
And is engageable with a tool for introducing or discharging the fluid into the interior of the 3-way valve.
5. The method of claim 4,
And the second opening is engageable with the intravenous connector.
The method according to claim 1,
The three-way valve
A third valve body formed at a position where the first valve body and the second valve body intersect and having both ends thereof extended by a predetermined length in a direction perpendicular to the first valve body and the second valve body,
≪ / RTI > further comprising:
The method according to claim 6,
The third valve body
And a fourth opening formed at an upper end of the catheter body.
8. The method of claim 7,
The three-way valve
A part of the body is inserted into the third valve body to selectively control the insertion or discharge of the fluid,
≪ / RTI > further comprising:
9. The method of claim 8,
The lever
A first lever body inserted into the third valve body through the fourth opening; And
A second lever body provided on an upper portion of the first lever body and protruding toward three directions and having a T-
Gt; catheter < / RTI > assembly.
10. The method of claim 9,
On the periphery of the first lever body
And a through hole is formed at a position corresponding to a direction in which the second lever body protrudes.
11. The method of claim 10,
The diameter of each of the through holes
And are equal to each other to uniformly introduce or discharge the fluid.
5. The method of claim 4,
The cap
A cap body integrally coupled to the third opening and having a sub-needle at an end thereof; And
A cap lid coupled to an end of the cap body to seal the sub needle,
Gt; catheter < / RTI > assembly.
13. The method of claim 12,
The sub-
Wherein the elastic member having an elastic force surrounds the periphery and is exposed to the outside as the elastic member is pushed to the rear end by the elastic force.
14. The method of claim 13,
The sub-
And is engageable with a tool for introducing or discharging the fluid into the interior of the 3-way valve upon exposure to the outside.
15. The method of claim 14,
Wherein said sub-needle is engageable with a blood sample storage container.

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