KR200305256Y1 - Cap of tube for supplying liquid - Google Patents

Abstract

PURPOSE: A cap of a tube for supplying a liquid is provided to easily remove air even in case that air in the tube exists between liquids. CONSTITUTION: The cap(10) of a tube for supplying a liquid is a terminal cap connected to the end of the tube(90). The cap(10) comprises: a passage connected to the tube(90) and leading to the outside; a liquid absorbing member located at the passage; and a filter(50) of gas permeability and liquid impermeability blocking the passage at a position farther from the tube than the liquid absorbing member.

Description

Cap of liquid injection tube {CAP OF TUBE FOR SUPPLYING LIQUID}

The present invention relates to a cap of a liquid injecting tube, and more particularly to a cap for removing air (air) present in a tube before injecting liquid with the cap attached.

Typically, a tube is connected to a liquid supply device that serves to supply drugs (or blood) or the like into the human body. Before the drug is injected, the end of the tube is closed with a cap. When the drug is injected, the cap is removed and the inlet of the member (eg, catheter) directly connected to the human body is connected to the end of the tube. Before connecting the tube to the catheter, the injection liquid is lowered to remove any air remaining in the tube. This is because dangerous air can occur if air enters the patient's body. There is usually a loss of injection during the deaeration process. Conventional caps also could not be sterilized by gas with the caps fitted.

The configuration proposed by the present inventors to solve this problem is described in Utility Model Registration No. 20-0226977. In this configuration the end cap is equipped with an air filter or air vent to conveniently remove air in the tube. That is, while the drug is supplied to the tube from the liquid supply device, the air in the tube is pushed by the supplied drug to move toward the cap, and eventually passes through the air vent through the air filter, but only the air escapes without loss of liquid. Air can be removed easily. This configuration has a remarkable effect and has a significant remarkable effect compared to the conventional cap. However, sometimes air enters between the drug and the drug in the tube. As such, when the air is located between the liquid and the liquid, the air filter and the air vent may be blocked by the preceding liquid when the air is drawn out, so that the air present between the liquid and the liquid may not be removed. In this case, it may be inconvenient to open the cap to remove the air present between the drug and the drug, remove the liquid prior to the air, close the cap, and remove the air. To alleviate this inconvenience, even if air is present between the liquid and the liquid, there is a need for an improved end cap capable of removing the air between the liquids without having to remove the cap.

Accordingly, it is an object of the present invention to provide a construction of an end cap that further improves the existing end cap structure of the present inventors with excellent effects. Specifically, it is to provide a cap for a tube end that easily removes air even when air in the tube is present between the liquid and the liquid.

1 is a perspective view of the injection device with a tube cap according to an embodiment of the present invention

Figure 2 is a perspective view of the tube cap of Figure 1, showing a state in which the tube is coupled

3 is a cross-sectional view of the tube cap of FIG.

<Description of the symbols for the main parts of the drawings>

10 cap 20: body

30: stopper 40: liquid absorbing member

50: air filter

The tube usually contains air, and when the injection liquid is fed into the tube, the air escapes to the end of the tube and the injection liquid reaches the end of the tube. Occasionally, there may be air just after the injection solution first reached the end of the tube, and the present invention provides a cap for the end that effectively removes the air even in this case. The inventors noticed that if there was air behind the liquid first reached at the end of the tube, the inventors devised a cap in which the end cap was disposed with an absorbent material (absorbent) capable of absorbing the liquid.

According to one aspect of the present invention, as an end cap connected to the end of the tube,

A passage to the outside and connected to the tube,

A liquid absorbing member positioned in the passage;

A tube end cap is provided that includes a gas-permeable and liquid-impermeable filter that blocks the passage at a location remote from the tube (ie, downstream) relative to the liquid absorbing member.

The liquid absorbing member may be formed to surround the passage. The absorbing member may be a sponge material or a fiber material.

The filter may be made of a porous plastic resin material.

The tube end cap has an outer wall and a joining protrusion provided radially inward of the outer wall so as to be connected to the tube, the opposite end of the end provided with the joining protrusion is opened, and the passage is formed therein and the liquid It may include a cover having a main body for receiving the absorbent member, and a discharge hole coupled to close the other open end of the main body and connected to the passage and blocked by the filter.

The coupling protrusion may be formed of a tube extending in and out of an end portion of the outer wall, and the absorbing member may be inserted and fixed between the outer wall of the main body and a portion extending inwardly of the coupling protrusion.

The stopper may further include an extension part blocking the absorbing member and the filter.

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

Referring to FIG. 1, a tube 90 is attached to the injection liquid injection device 60. The injection liquid injector 60 generally includes a cylinder 64 and a piston 66. The injection fluid in the cylinder is pushed out by moving the piston by the elasticity of the rubber bag, the pressure of the gas, or the push rod driven by the motor.

The tube 90 is connected to the end of the cylinder 64 of the injection device 60. In the path of the injection liquid leading to the tube 90, for example, a supply valve 70 for supplying the injection liquid into the cylinder 94 before use is provided. A clamp 72 is also provided to block the flow of the injection liquid flowing along the tube 90 when desired. The configuration of the tube connected with the above injection device may be a published device disclosed in WO 02/11791 A1, and a part of the content posted in WO 02/11791 A1 is incorporated herein by reference. The end of the tube 90 is connected to the end connecting member 80 and the cap 10 for blocking the opening of the connecting member 80. When the drug is injected, the cap 10 is removed and then the connection member 80 is connected to the inlet of the member (eg, catheter) directly inserted into the human body.

2, a cylindrical protrusion 84 is provided at the end of the end connecting member 80. The protruding portion 84 is provided with a communication hole 86. Injection liquid is supplied through this hole 86. The connecting member 80 is provided with a cylindrical wall 82 surrounding the protrusion 84. A female thread is formed inside the cylindrical wall 82 so as to be coupled to the male screw of the outer extension portion 261 of the cap 10 to be described later. After the cap 10 is removed, the female thread is screwed into a connector such as a catheter. This screw joint is configured to maintain air tightness.

Referring to Figure 2, the cap 10 is substantially cylindrical, and one end of the connecting member 80 at the end of the tube 90 is coupled. 2 and 3, the cap 10 includes a main body 20 and a stopper 30. The main body 20 has a cylindrical shape with a perforated inside and a stepped cylindrical shape, wherein the cylindrical outer wall 22 extends to the end wall 24. The opposite end on the side with the end wall is opened and closed by a stopper 30 described later.

At the center of the side where the end wall 24 is provided, a coupling pipe 26 is formed which extends along the axial direction on both sides of the end wall 24. A male screw is formed at the end of the outer extension portion 261 formed to extend outwardly of the coupling pipe 26 to be coupled to the female screw formed inside the cylindrical wall 82 of the connection member 80. Inside the coupling tube 26 is a circular passage 263 is formed. A corresponding protrusion 84 of the connecting member 80 is inserted into the passage 263 so that the passage hole 86 in the protrusion 84 and the passage in the coupling pipe 26 communicate with each other. The passage 263 of the coupling pipe 26 is slightly inclined so as to decrease inwardly. This is for the connecting member 80 to be in close contact as the corresponding protrusion 84 is inserted and inserted into it. The inner extension part 262 formed to extend inwardly of the coupling pipe 26 is spaced apart from the side wall 22 at regular intervals. As the space between the inner extension portion 262 and the side wall 22, the absorbing member 40 to be described later fits snugly.

3, the absorbing member 40 is a ring-shaped cylindrical member provided with a passage through the center thereof. In this embodiment, the absorbing member 40 is preferably a material capable of absorbing and retaining a liquid well, but a fiber material such as a sponge or a cloth which is a foam can be used. As an example, a sponge made of melamine formaldehyde polycondensate may be used. However, the present invention is not limited to the material of the absorbent member. Any material that absorbs liquid well can be used. The absorbing member 40 has an inner diameter and an outer diameter so as to fit snugly between the inside of the side wall 22 and the outer wall of the inner extension portion 262 of the coupling pipe 26. The outer surface of the absorbing member 40 is in contact with the side wall 22 of the main body 20, one end of which is provided between the inner extension 262 of the coupling pipe 26 and the side wall 22 of the main body 20 It fits into the shaped space and is fixed. The opposite end is supported by a stopper 30 described later.

2 and 3, the plug 30 has a circular cover 32 covering the opening of the main body 20, and an insertion boss extending from the cover 32 to be received and fitted into the main body 20 ( 34). The cover 32 and the insertion boss 34 is provided with an axial passage 341. A locking jaw 3431 is provided at the cover end of the passage 341. The passage 341 has an inclined portion 342 inclined so that the diameter thereof becomes smaller from the end of the insertion boss 34 toward the lid 32, and a slightly larger diameter from the inclined portion 342, so that the air discharge hole ( A filter accommodating portion 343 extending substantially the same diameter up to the portion 321 is formed. There is a shallow step 3432 formed due to the difference in diameter and the end of the filter accommodating part 343 and the inclined part 342. An air filter 50 to be described later is inserted into the filter accommodating part 343 so as to fit snugly, and the air filter 50 accommodated in the filter accommodating part 343 includes the filter accommodating part 343 and the inclined part. It is caught by the step 3342 provided between the 342 and does not exit toward the inclined portion 342. The filter is not pulled out by the locking step 3431 to the outside.

Referring to FIG. 3, the insertion boss 34 has circular first, second, and third extensions 35, 36, 37, which in turn go to the ends and have small outer diameters. The outer diameter of the first extension part 35 is determined in diameter so as to be in close contact with the inner surface of the side wall 22 of the main body 20. This is to prevent the plug 30 from being tightly inserted when the plug 30 is fitted through the opening of the main body 20. Alternatively, the stopper 30 and the main body 20 may be combined so as not to be separated by an adhesive. The second extension 36 extends with a diameter smaller than the first extension 35. There is a step between the first extension part 35 and the second extension part 36.

The outer diameter of the third extension portion 37 having a diameter smaller than the second extension portion 36 is determined so as to fit snugly into the liquid absorbing member 40. Between the second extension portion 36 and the third extension portion 37, there is a bump. The third extension portion 37 is long inserted into the liquid absorbing member 40. The outer surface of the third extension portion 37 is in close contact with the inner surface of the absorbent member 40, and the end of the absorbent member 40 abuts the step between the second extension portion 36 and the third extension portion 37. . The end of the third extension portion 37 is inclined so as to have a smaller diameter, so as to be well inserted into the absorbing member 40. The third extension part 37 prevents the liquid absorbing member 40 from contacting the air filter 50 for the reason that the liquid absorbing member 40 touches the filter 50 or the liquid absorbed by the liquid absorbing member 40 flows out again. Sometimes. When the liquid comes into contact with the air filter 50 or the air discharge hole 50, the air is not properly removed or takes a lot of time.

The air filter 50 completely blocks the passage 321 and is made of a liquid impermeable and gas permeable material. In other words, the liquid does not penetrate, but the gas is made of a permeable material. Preferably, the air filter 50 may be used by processing a porous plastic resin material having such a property into a shape suitable for the passage. Materials for such air filters are available from Porex Corporation (Fairburn, GA 30213, USA) at www.porex.com. Forex Corporation's Porex Hydrophobic Vents can be used as a product, which is made of polyethyle polytetrafluoroethylene. The material of the air filter may be obtained from Micropore Plastics, Inc. of Stone Mountain, Georgia, USA. The air filter 50 is elastic to some extent and contracts slightly while being inserted into the passage 321 of the stopper 30 so as to be restored in place.

Referring now to Figures 2 and 3, the operation of the cap will be described in detail.

Referring to Figures 2 and 3, there is air 91 in the tube 90 immediately after the first drug reaching the end of the tube, through which the cap 10 passes through the passage hole 86 of the connecting member 80. Flows in. The first introduced drug is all absorbed by the liquid suction member 40 having the liquid absorbing force before it reaches the air filter 50. Once absorbed by the absorbent member 40, the drug is not introduced back to the air filter 50 by the third extension 37 of the stopper 30. When the first introduced drug is all absorbed by the liquid intake member 40, the air 80 then introduced reaches the air filter 50 and is discharged through the air filter 50 which is naturally liquid impermeable and gas permeable. Through the holes 321 are all exited out and eventually only the drug remains inside the cap 10. Now, when the cap 10 is rotated to be separated from the end connecting member 80 and then coupled to a catheter, only the drug can be supplied in a state where air is completely removed.

Injecting the drug using the cap of the liquid injection tube according to the present invention, even if the air in the tube between the drug and the drug liquid can be removed without a separate operation while minimizing the loss of the drug. Therefore, it is possible to reduce the loss of drugs and to minimize the risk of introducing air into the patient.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. Those skilled in the art will appreciate that modifications and changes can be made without departing from the spirit and scope of the present invention and that such modifications and changes also belong to the present invention.

Claims (8)

An end cap connected to the end of the tube, A passage to the outside and connected to the tube, A liquid absorbing member positioned in the passage; A tube end cap comprising a gas permeable and liquid impermeable filter for blocking the passage at a position remote from the tube as compared to the liquid absorbing member. The tube end cap of claim 1, wherein the liquid absorbing member surrounds the passage. The tube end cap of claim 1, wherein the absorbent member is a sponge material. The tube end cap of claim 1, wherein the absorbent member is a fiber material. The tube end cap of claim 1, wherein the filter is made of a porous plastic resin material. 6. An outer wall and a joining protrusion provided on a radially inner side of the outer wall so as to be connected to the tube, and an opposite end of the end provided with the joining protrusion is opened. A main body formed therein and the liquid absorbing member accommodated therein; And a lid coupled to close the other open end of the body and having a discharge hole connected to the passageway and blocked by the filter. The tube end of claim 6, wherein the coupling protrusion is formed of a tube extending in and out of the end of the outer wall, and the absorbing member is inserted into and fixed between the outer wall of the main body and the portion extending inwardly of the coupling protrusion. cap. 7. A tube end cap according to claim 6, wherein said stopper further comprises an extension for blocking between said absorbent member and said filter.