JP2003290362A - Side injection tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side injection tube capable of perfectly eliminating a hospital infection accident and an erroneous centesis accident of an injection needle to a medical worker or a patient. <P>SOLUTION: In this side injection tube, an elastic plug body having a longitudinal hole previously penetrating the upper and lower faces in a center area is pressed into a tube body rising from a side face of a main tube having both ends allowing connection of liquid guiding tubes of blood or a medical solution in a pressing state to the center side such that the plug body is locked to an annular shelf formed in the inner wall inside the tube body, and the elastic plug body is pressed by a bored cap from the opening end side of the tube body. By only the pressing by a tip tube of a syringe not installed with an injection needle, side injection can be executed. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood-conducting tube for connecting a vial and a patient, in the middle of a liquid-conducting tube,
Alternatively, a side-injection tube that allows timely injection of the necessary drug solution to the patient during the treatment from the middle of the liquid guiding tube that connects the patient with an extracorporeal circuit such as an artificial kidney used for the treatment of renal failure. It is about.

[0002]

2. Description of the Related Art A typical example of a conventional side casting pipe is shown in FIG. This is an elastic stopper having a softness that allows a cylindrical body 54 to be raised on one side surface of a tubular body 53 having a connecting portion 52 of a liquid guiding tube 51 at both ends, and an injection needle S to be pierced at an open end of the cylindrical body 54. A body (rubber stopper) 55 was press-fitted, and its upper surface was covered with a perforated cap 56.

In the conventional side injection tube, the tip tube C'of the syringe C is provided on the upper surface of the elastic plug body 55 exposed from the hole of the cap 56.
It was made possible to inject the drug solution or the like in the syringe C by piercing the injection needle S fixed to and pushing the plunger (not shown). This elastic plug 55
Since the hole of the injection needle S pierced by this is immediately closed due to the elasticity of the material after the needle is pulled out, it does not give an obstacle such as liquid leakage to the medical work such as blood transfusion or liquid transfusion.

[0004]

However, although the elastic stopper 55 is soft, it cannot be pierced unless it is a hard and pointed object such as a metal injection needle,
Therefore, as mentioned above, there was no other choice but to use such a needle for the side injection work of the drug solution, etc. Therefore, after the side injection work was completed, the injection needle was immediately provided with a protective cap (not shown) to protect it. The needle was removed from the syringe together with the cap and discarded, but there is a high possibility that an accident may occur in which the needle tip of the injection needle is pierced into the finger when the protective cap is applied to the injection needle. If the blood of an infectious carrier adhered to the, there was a risk of infection.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a side-injection tube capable of eliminating accidental puncture of an injection needle and nosocomial infection accident to medical staff and patients. To do.

[0006]

In order to achieve the above-mentioned object, the side-injection pipe according to the present invention has an inner wall inside a tube which is erected on one side of a main pipe to which a blood or drug solution guide tube can be connected at both ends. An elastic plug having a vertical hole penetrating the upper and lower surfaces in the central region is pressed into the central region so as to be locked to the annular shelf provided in It is characterized in that it is pushed in from the open end side with a perforated cap, and it is configured so that side injection can be performed simply by pushing with the tip tube of a syringe without an injection needle attached.

Further, in the side-injection pipe according to the invention described in claim 2, the perforated cap is fitted and locked to an annular rib provided on an inner wall of the tubular body on the opening end side. The perforated cap for pressing the elastic plug body in the pipe body is configured so that it can be dropped and fixed to the open end side of the pipe body.

Further, in the side-injection pipe according to the present invention as defined in claim 3, the elastic plug body penetrates the upper and lower surfaces in the central region in advance in a perforated cap which can be cappedly coupled to the upper end portion of the pipe body. An elastic plug having a vertical hole is press-fitted in a state of being pressed toward the center side, and the elastic plug is pressed between the perforated cap and the end face of the pipe, It was constructed so that the circular shelf on the wall could be omitted.

Further, in the side-injection pipe according to the invention described in claim 4, the pipe body for cappedly connecting the perforated cap,
Characterized by a Y-shaped tube consisting of a trunk tube and a branch tube, so as to facilitate lateral injection from the middle of a longitudinally guided tube that connects a vial bottle of a blood transfusion or infusion set and a patient with a drop. Configured to.

Still further, in the side-injection pipe according to the invention described in claim 5, the tubular body for captively coupling the perforated cap comprises:
The lower end is a tubular body having a tapered coupling tube and a female threaded portion surrounding the tapered coupling tube, which is a conduit tube branched from a main line connecting a vial bottle of a blood transfusion or infusion set and a patient. It was constructed to facilitate side-injection from the end.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIGS. 1 is a partially cutaway perspective view of the present-side injection pipe, FIG. 2 is a front sectional view of the present-side injection pipe, FIG. 3 is a top view of an elastic plug body before press-fitting into the pipe body, and FIG. 4 is the present-side injection pipe. 5 is a front sectional view when the perforated cap is capped with the pipe body of the present application side injection pipe, and FIG. 6 is a Y-shaped pipe of the present application side injection pipe. FIG. 7 is a front cross-sectional view in the case where the tube body of the injection pipe of the present application is a single tube.

1 to 4, reference numeral 1 indicates a main pipe of the side injection pipe of the present application. As shown in FIGS. 1 and 2, the main pipe 1 has, at both ends, connecting portions 1a, 1b of a blood or chemical liquid guiding tube 2.
Is provided. The liquid guiding tube 2 is also a liquid guiding tube that connects a vial (not shown) of a blood transfusion or an infusion set to a patient, and an extracorporeal circuit (not shown) such as an artificial dialyzer or a cardiopulmonary bypass and a patient. Sometimes it is a liquid conducting tube that connects with and at other times.

A tube body 3 is erected on one side surface of the main tube 1. An annular shelf 4 is provided on the lower part of the inner wall of the tube body 3 (close to the inner path of the main tube 1), and an elastic plug body 5 is press-fitted into the tube body 3 so as to be locked by the annular shelf 4. There is.

As shown in FIG. 3, a vertical hole 6 is formed in the central region of the elastic plug body 5 so as to pass through the upper and lower surfaces in advance. The vertical hole 6 has an outer diameter larger than the inner diameter of the tubular body 3. Since the elastic plug body 5 is pressed into the tube body 3 while being pressed toward the center side, it is normally closed in an airtight or liquid-tight manner.

The elastic plug body 5 press-fitted into the tube body 3 is
Further, the perforated cap 7 inserted from the open end side of the pipe body 3
The vertical hole 6 is more surely closed because the vertical hole 6 is pressed vertically with the annular shelf 4. Further, the elastic plug body 5 press-fitted into the tube body 3 is
It is completely air-tight and liquid-tight to the inner wall surface of the main pipe 1, and the liquid flowing through the inner passage of the main pipe 1 does not leak from this portion. As a material of the elastic plug body 5, a material having a high elasticity such as silicone rubber or IR rubber can be used.

The elastic plug 5 is a perfect circle in plan view in FIGS. 1 and 3. This is because the shape corresponds to the shape of the open end of the tubular body 3. In other words, if the shape of the open end of the tubular body 3 is, for example, an oval shape or a square shape, the planar shape of the elastic plug body 5 will also be an oval shape or a square shape correspondingly.

Thickness of the elastic plug 5 (vertical dimension)
Is determined in consideration of the relationship with the liquid leakage prevention property. Further, the formation of the vertical hole 6 is performed prior to press fitting into the tube body 3. The hole diameter is determined by the compression rate when the elastic plug body 5 is pressed toward the center side. Also, the planar shape may be a perfect circle or an ellipse as long as it surely collapses when pressed, but it is experimentally confirmed that it is easy to collapse if it is made into a star shape (not limited to the four-pointed star as shown in Fig. 3). Has been done.

1, 2 and 4, the perforated cap 7 is fitted and locked in a drop-down manner by overcoming the annular rib 8 provided on the inner wall of the tubular body 3 on the open end side. ,
As shown in FIGS. 5 to 7, the perforated cap 7 is formed in a tubular shape having a top surface with a hole 7 ', and the tubular portion can be capped with the upper end portion of the tubular body 3. There is also.

FIG. 5 shows the above-mentioned pipe body 3, that is, the raised pipe body 3 on one side surface of the main pipe 1 on which the connecting portions 1a and 1b of the blood or drug solution introducing tubes 2 are provided at both ends. The case where the upper end portion is capped is shown. In this case,
The elastic plug body 5 having the vertical hole 6 is provided with the perforated cap 7
Since it is press-fitted into the tubular portion of the tube body toward the center side and is captively coupled to the tube body 3 in this state, the elastic plug body 5 is provided with the peripheral portion of the top surface of the perforated cap 7 and the tube body 3. Therefore, the upper end surface of the tubular body 3 can serve as the annular shelf 4, and the annular shelf 4 can be omitted.

FIG. 6 shows the tubular perforated cap 7
It shows a case where a Y-shaped tube 1'consisting of a trunk pipe 3a and a branch pipe 3b is capped with the upper end of the trunk pipe. Also in this case, the elastic plug body 5 is pressed into the tubular portion of the perforated cap 7 in a state of being pressed toward the center side, and the peripheral portion of the top surface of the perforated cap 7 and the upper end surface of the tubular body 3 are It is supposed to be pushed in between. This Y-shaped tube 1'is usually inserted in the middle of a liquid guiding tube that connects a vial (not shown) of a blood transfusion or infusion set and a patient by a drop. During this transfusion or infusion, It is suitable for side-injection.

FIG. 7 shows the cylindrical perforated cap 7
It shows a case in which the lower end portion is capped with the upper end portion of a single pipe 1 ″ having a tapered coupling pipe 3c and a female screw portion 3d surrounding the periphery thereof. Is pressed into the tubular portion of the perforated cap 7 toward the center side and is pressed between the peripheral portion of the top surface of the perforated cap 7 and the upper end surface of the tubular body 3. This single tube 1 ″ is such that the tapered connecting tube 3c is inserted into the tube end 3e of the liquid guiding tube 2 branched from the main line connecting the vial (not shown) of the blood transfusion or infusion set and the patient. Along with the male screw 3f provided on the outer periphery of the pipe end 3e, the female screw portion 3
It is used by screwing (locking) d, and is suitable for side injection during blood transfusion or infusion in this form.

The tubular body 3 and the tubular perforated cap 7 capped at the upper end of the tubular body 3 are coupled to each other by the annular concave rib 3g provided on the tubular body 3 side and the cap 7 as shown in FIGS. Although the annular convex ribs 3h provided on the side are configured to engage with each other, they may be joined by using other means (for example, an adhesive).

Next, the operation of the present invention will be described. First, an elastic plug body 5 having a vertical hole 6 penetrating the upper and lower surfaces is prepared in advance, and the elastic plug body 5 is raised from the tube body 1 to the center side of the cylindrical body 3. It is pressed into the annular shelf 4 while being pressed toward it. Then, the annular rib 8 provided on the inner wall on the opening end side of the tubular body 3 is passed over and fitted and locked.

A part of the upper surface of the elastic plug body 5 is exposed through the hole 7'after the perforated cap 7 is fitted.
The vertical hole 6 is present in this exposed portion.
Is hermetically and liquid-tightly closed by pressing the elastic plug 5 into the cylindrical body 3 (and including the pressing by the cap 7), so that blood or drug solution that normally flows through the liquid guiding tube 2 leaks out. There is no such thing.

Therefore, when side-injecting a necessary liquid medicine with respect to the blood or the liquid medicine flowing through the liquid guiding tube 2, as shown in FIG. 4, the front tube C'of the syringe C to which the injection needle is not attached is opened. When pushed in through the hole 7'of the cap 7, the elastic plug 5 is deformed and partially protrudes from the center hole 4'of the annular shelf 4, and the vertical hole 6 is largely opened (the same applies to the embodiments of FIGS. 5 to 7). To).

Therefore, if the plunger (not shown) of the syringe C is operated while pushing the tip tube C'of the syringe C without the needle attached, the contents (medicine solution, nutritional supplement, etc.) are pushed out. The contents are laterally injected (mixed injection) into the blood or the drug solution flowing from the inner passage of the main pipe 1 through the liquid guiding tube through the vertical hole 6 having a large opening.

That is, when the side injection tube of the present application is used, side injection of a drug solution or the like can be reliably performed even if it is not a hard and sharp needle such as a metal injection needle. There is no possibility of causing an accident, and the situation of infection by the blood of an infectious carrier will never occur.

[0028]

As described above, the side-injection tube according to the present invention is provided with the tubular body standing on one side surface of the tubular body which can be connected to both ends of the blood or drug solution conducting tube, and is provided on the inner wall of the tubular body. In order to be locked by the annular shelf, an elastic stopper having a vertical hole that penetrates the upper and lower surfaces in the central area is pressed inward while being pressed toward the center side, and the upper surface side of the elastic stopper is Since it is characterized in that it is pressed by the perforated cap inserted from the opening end side of the tubular body, side injection can be performed while pressing the hole of the perforated cap with the tip tube of the syringe without the injection needle attached. Therefore,
There is no need for a hard and sharp object such as a metal injection needle,
It has an excellent effect of eliminating accidental needle stick accidents and nosocomial infection accidents for medical staff and patients.

Further, the side-injection pipe according to the invention described in claim 2 is characterized in that the perforated cap is fitted and locked to an annular rib provided on an inner wall of the tubular body on the opening end side. Therefore, the perforated cap that presses the upper surface side of the elastic plug body in the pipe body can be easily fixed by being dropped onto the opening end side of the pipe body.

Further, in the side-injection pipe according to the invention described in claim 3, the upper and lower surfaces are preliminarily formed in the central region in a cylindrical perforated cap in which the elastic plug body can be capped and coupled to the upper end portion of the pipe body. It is characterized in that an elastic plug having a vertical hole penetrating therethrough is press-fitted toward the center side, and the elastic plug is pressed between the perforated cap and the upper end surface of the tubular body. Therefore, the annular shelf on the inner wall of the pipe can be omitted, and the excellent effect that the structure can be simplified.

Furthermore, in the side-injection pipe according to the invention described in claim 4, the tubular body for captively coupling the perforated cap is
Since it is a Y-shaped tube consisting of a trunk tube and a branch tube, side injection from the middle of the longitudinal liquid guiding tube that connects the vial bottle of the blood transfusion or infusion set and the patient by a drop is possible. It has an excellent effect that it becomes easy.

Furthermore, in the side-injection pipe according to the invention described in claim 5, the tubular body for captively coupling the perforated cap,
Since it is a tube body having a tapered coupling tube at its lower end and a female threaded portion surrounding the tapered coupling tube, it is a liquid conduit branched from the main line connecting the vial bottle of the blood transfusion or infusion set and the patient. It has an excellent effect that side injection from the end portion of the tube becomes easy.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a casting pipe of the present application.

FIG. 2 is a front sectional view of the injection pipe of the present application.

FIG. 3 is a top view of the elastic plug body before being press-fitted into the tubular body.

FIG. 4 is a front cross-sectional view showing the action of the injection pipe of the present application.

FIG. 5 is a front cross-sectional view of a case where a perforated cap is captively connected to the pipe body of the present-side injection pipe.

FIG. 6 is a front cross-sectional view of a case where a Y-shaped tube is used as a pipe body of the present-side injection pipe.

FIG. 7 is a front cross-sectional view in the case where the tubular body of the present-side injection pipe is a single pipe.

FIG. 8 is an explanatory view showing a conventional side injection tube and a conventional injection needle.

[Explanation of symbols]

1 main 1a, 1b connection part 1'Y-tube 1 ″ single tube 2 Liquid transfer tube 3 tube 3a Main pipe 3b branch pipe 3c coupling pipe 3d female thread 3e Pipe end 3f male screw 3g annular concave rib 3h annular convex rib 4 ring shelf 4'center hole 5 Elastic plug 6 vertical holes 7 holed cap 7'hole 8 annular rib C syringe C ′ tip tube 51 Liquid transfer tube 52 Connection 53 tube body 54 cylinder 55 Elastic stopper (rubber stopper) 56 cap

Claims (5)

[Claims] 1. An elastic plug body having a vertical hole penetrating the upper and lower surfaces in the central region in advance so as to be locked to an annular shelf provided on the inner wall of the tubular body which is erected on one side surface of the main pipe. A side-injection pipe, characterized in that the elastic stopper is press-fitted in a state in which the elastic stopper is pressed by a perforated cap from the opening end side of the pipe. 2. The side-injection pipe according to claim 1, wherein the perforated cap can be fitted and locked to an annular rib provided on an inner wall of the pipe body on the opening end side. 3. An elastic plug body having a vertical hole penetrating the upper and lower surfaces in a central region thereof in advance in a perforated cap capable of being captively coupled to the upper end portion of the pipe body is pressed toward the center side. The side-injection pipe according to claim 1, wherein the side wall is press-fitted in a state, and the elastic stopper is pressed between the perforated cap and the end face of the pipe body. 4. The side-injection pipe according to claim 3, wherein the pipe body to which the perforated cap is capped and connected is a Y-shaped pipe including a trunk pipe and a branch pipe. 5. A single pipe having an upper end portion of a pipe body to which the perforated cap is capped and connected, the lower end portion having a tapered connection pipe and a female screw portion surrounding the periphery thereof. The side casting pipe according to claim 3.