JPH08206230A - Needleless mixing and injection tube for transfusion - Google Patents

Abstract

PURPOSE: To make it possible to connect and separate a side injecting tube or syringe in a sterile state and to prevent an operator for connecting this side injecting tube from erroneously pricking a needle at his hand, etc. CONSTITUTION: This needleless mixing and injecting tube for transfusion is used to connect the side injecting tube or syringe to transfusion main tubes 3, 4 and consists of a mixing and injecting main tube 1 made of a rigid polyvinyl chloride, a branched tube 2, a needle-like tube 9 and a rubber member 7 made of silicone rubber compounded with an antimicrobial agent. The mixing and injecting main tube and the branch tube are connected to a Y shape and the aperture of the branch tube is provided with a rubber member. A tight contact hole 8 is formed in approximately the central part of the rubber member and the inside surface of the branch tube is successively provided with the base ends of the needle-like tubes having a pointed front end on the deep side of the rubber member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needleless mixed infusion tube for infusion, and more particularly, it is possible to connect and disconnect the side infusion tube in an aseptic state, and the operator who connects the side infusion tube mistakenly cuts the skin. The present invention relates to a needleless mixed injection tube for infusion which does not puncture the needle.

[0002]

2. Description of the Related Art Since a patient's physical strength has decreased before and after surgery, it is common practice to supply a medicinal solution or a nutrient solution from a vein in order to recover the patient's physical strength. Supply of chemicals, etc.
It is performed by connecting an infusion tube to a catheter inserted into a living body tube and injecting a drug solution or the like through the tube. If there is only one type of drug solution, one infusion tube will suffice.Usually, multiple drug solutions will be supplied to the patient.Therefore, branch the tube with a mixed injection tube, connect a side injection tube or syringe, and connect the drug solution to the infusion tube. To form an infusion route (or infusion line) for supplying a plurality of drug solutions. As a conventional mixed injection pipe, there is known a pipe in which a rubber member for tightly plugging the opening of the branch pipe is fitted. As means for connecting the infusion tube or syringe to this mixed injection tube, a puncture needle is attached to the tip of the infusion tube or syringe, and the needle is pierced into the rubber member to inject the infusion tube or syringe into the infusion tube. Connect with the pipe. However, it takes a considerable force to pierce the rubber member with the puncture needle, and the operator may erroneously puncture his skin.
As another mixed injection tube, one in which a three-way stopcock is formed at the confluence of the infusion main tube and the infusion side injection tube is known. In this mixed injection tube, since the pipe line that closes the three-way stopcock is exposed to the outside air, various bacteria are likely to adhere to the inner wall of the mixed injection tube, and it is also difficult to disinfect to remove the various bacteria.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to allow side injection tubes or syringes to be connected and disconnected in an aseptic state, and for an operator connecting the side injection tubes to accidentally pierce the skin with a needle. It is to provide a needleless mixed injection tube for infusion which does not have the above. The inventors of the present invention have made extensive studies to achieve the above-mentioned object, and a rubber member having a close contact hole formed in a substantially central portion thereof is used by using a mixed injection pipe provided in a branch pipe opening.
It has been found that the above object can be achieved, and the present invention has been completed based on this finding.

[0004]

Thus, according to the present invention, (1) a mixed injection main pipe, a branch pipe and a transfusion mixed injection pipe having a rubber member, wherein (A) the mixed injection main pipe and the branch pipe are: Each of the pipes has a lumen that communicates from one end to the other end, and (B) the branch pipe is connected to the side part of the mixed injection main pipe so that one end of the branch pipe communicates with the lumen of the mixed injection main pipe. A rubber member is fitted into the opening at the other end, and (C) the rubber member is provided with a contact hole, so that a needleless mixed injection tube for infusion is provided.
According to the present invention, (2) the infusion needleless mixed injection tube according to the above (1), which further has a needle-shaped tube, wherein (D) the needle-shaped tube is a tube having a lumen and a proximal end portion thereof. The needle tube is connected to the lumen of the branch pipe so as to communicate with the lumen of the branch pipe. There is provided a needleless mixed injection tube for infusion, which has a small outer diameter and is covered with a rubber member.

Further, the following are provided as preferred embodiments of the present invention. (3) The needleless mixed injection tube for infusion according to (1) or (2), wherein the rubber member is formed of a flexible material. (4) The needleless mixed injection tube for infusion as described in (1) or (2) above, wherein the rubber member is made of silicone rubber. (5) The needleless mixed injection tube for infusion according to (1) or (2) above, wherein the rubber member is formed of a material containing an antibacterial agent. (6) The infusion needleless mixed injection tube according to the above (2), wherein the needle-shaped tube is made of resin or metal. (7) The needleless mixed injection tube for infusion according to the above (2), wherein the outer shape of the needle-shaped tube is a cone. (8) The needleless mixed injection tube for infusion according to (2) above, wherein the rubber member covers the outer surface of the needle-shaped tube from the tip to the base. (9) The infusion needleless mixed injection tube according to (1) or (2), wherein an uneven fitting portion is provided on the outer wall of the branch pipe. The needleless mixed injection tube for infusion of the present invention has the above (3)
It may have a structure in which the features listed in (9) to (9) are appropriately combined. Further, according to the present invention, the above (1)-
There is provided an infusion line comprising the needleless mixed infusion tube for infusion as described in (9), a drip tube, a filter, and an infusion main which is fixedly connected to these.

The needleless mixed injection pipe for infusion of the present invention is a mixed injection pipe for infusion having a mixed injection main pipe, a branch pipe and a rubber member.

The mixed injection main pipe and the branch pipe have a lumen communicating from one end to the other end. The branch pipe is connected to a side portion of the mixed injection main pipe so that one end of the branch pipe communicates with the lumen of the mixed injection main pipe. Mixed injection main and branch pipe y
It can be formed into a character shape (FIG. 1 or 2), an h shape (FIG. 5), a T shape, or the like. Infusion mains 3 and 4 are usually bonded or fused and joined to the end opening of the mixed injection main. It is preferable to form an uneven fitting portion that can be fitted to the uneven fitting portion of the side injection pipe or the cover of the syringe on the outer surface of the branch pipe (FIGS. 3 and 4). By forming the concave-convex fitting portion, it is possible to prevent the side injection pipe or the syringe from coming off from the mixed injection pipe. The form of the uneven fitting portion is not particularly limited.

Examples of the material of the mixed injection main pipe and the branch pipe include polyamide, polyvinyl chloride, polypropylene, polyurethane, polycarbonate, polyethylene and the like.
Of these, preferred is rigid polyvinyl chloride.
The inner diameter of the mixed injection main pipe is usually 1.5 to 8 mm. The inner diameter of the branch pipe is usually 1.5 to 8 mm. The wall thickness is usually 1 to 5 mm. The length of the mixed injection main is
It is usually 20 to 60 mm, and the length of the branch pipe is usually
It is 5 to 60 mm.

In the needleless mixed injection tube for infusion according to the present invention, a rubber member is fitted in the opening of the branch tube. The rubber member has a close-contact hole formed substantially in the center thereof. This rubber member usually seals the opening of the branch pipe to prevent sterilization from entering from the outside and prevent leakage of the drug solution flowing into the mixed injection pipe. When the side-injection tube or syringe is pushed into this rubber member, the contact hole is expanded and the side-injection tube or syringe can be inserted into the branch tube, and the mixed-injection tube and the side-injection tube or syringe come into communication with each other.

The form of the contact hole of the rubber member is not particularly limited, and examples thereof include a single letter shape and a cross shape. A part of the outer surface of the rubber member is in contact with the inner surface of the branch pipe so that the branch pipe can be sealed, and usually has a disc shape, a conical shape, a truncated cone shape, a cylindrical shape, or the like ( (Figure 6). The material of the rubber member is a flexible material, specifically, silicone rubber, natural rubber, polyurethane, soft polyvinyl chloride, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, polyisoprene, etc. Is mentioned. Of these, silicone rubber is preferable. The rubber member is preferably made of a flexible material containing an antibacterial agent or a bactericide in order to prevent the growth of various bacteria. The thickness (or height) of the rubber member is usually 0.5 to 40 mm, preferably 1 to 40 mm. The outer diameter of the rubber member is usually 70 to the inner diameter of the branch pipe.
It is 130%.

In the needleless mixed injection tube for infusion of the present invention, it is preferable to further provide a needle tube. Needle tube 9
Is a tube with one lumen. The tip of the needle-shaped tube has an outer diameter smaller than the inner diameter of the branch tube, and its outer surface shape is usually a conical shape (Fig. 7 (A)) or a pyramidal shape (Fig. 7 (A)).
(C)), a circular tube shape with a tapered tip (FIG. 7B), and the like. The tip of the needle-shaped tube does not need to be sharp, but it is preferable to have a sharp tip because the rubber member can be easily pierced and penetrated. The tip or side wall of the needle tube is usually provided with a hole 10 which penetrates the lumen of the needle tube.

The proximal end portion of the needle tube is connected to the inner surface of the branch tube so that the lumen of the needle tube and the lumen of the branch tube communicate with each other. The position of the inner surface of the branch pipe that continuously connects the base ends of the needle-shaped pipes is the inner side when viewed from the side of the branch pipe opening than the portion where the rubber member is fitted, and preferably the tip of the needle-shaped pipe. Should be deeper than the edge of the branch pipe opening. If the tip of the needle-shaped tube is set to be deeper than the edge of the branch tube opening, the tip of the needle-shaped tube will not damage the skin.
The length of the needle tube is usually 3 to 40 mm. The outer diameter of the tip of the needle-shaped tube is smaller than the inner diameter of the branch tube.
mm or less. The outer diameter of the base end portion of the needle-shaped tube is usually 1.5 to 8 mm because it is connected to the inner surface of the branch tube. The base end portion may be formed in a flange shape as shown in FIG. 7 (B) or (C).

In the needleless mixed injection tube for infusion of the present invention, the tip of the needle-shaped tube is covered with a rubber member. The shape of the rubber member may be any shape as long as it can cover the tip of the needle-like tube, and examples thereof include a disk shape, a truncated cone shape, a column shape, and a conical shape. After removing it, in order to make it easier for the rubber member to restore its original shape,
It is preferable that the rubber member covers the base of the needle-shaped tube (FIG. 6C).

The contact hole of the rubber member is provided substantially at the center of the rubber member. The contact hole does not need to penetrate the rubber member, and may have a depth such that the tip of the needle-shaped tube can be guided so as to collide with the substantially central portion of the rubber member.

In the needleless mixed injection tube for infusion of the present invention provided with a needle-shaped tube, when the side-injection tube or syringe is pressed against the rubber member from the outside, the inside of the rubber member becomes the tip of the needle-shaped tube. When a collision occurs and the side injection tube or syringe is pushed in, the rubber member is expanded by the needle-shaped tube, the needle-shaped tube projects from the rubber member, and the needle-shaped tube fits inside the lumen of the side injection tube or syringe. Then, the side injection pipe or syringe and the mixed injection pipe are connected.

A method for infusion using the infusion needleless mixed injection tube of the present invention will be described. FIG. 10 is a view showing a mode of an infusion line incorporating the infusion needleless mixed injection tubes 100, 101, 102 and 103 of the present invention. The infusion main of the present invention, the needleless mixed infusion tube, has an upper end of the infusion main 4 which is connected to an infusion pack (chemical solution container) at the upper end of the infusion main, and a lower end of the infusion main 1 is an infusion main connected to a living body via a catheter. The pipe downstream portion 3 is connected. Since the upstream part and the downstream part of the infusion main are usually used simultaneously with the mixed injection pipe, the connection is
Usually, a fixed connection method such as adhesion or fusion is used. An infusion needle 21 for connecting to the infusion pack 20, a chamber (or a drip tube) 22 for monitoring the flow rate of the infusion solution, and a flow rate controller for adjusting the flow rate at the upstream or downstream portion of the infusion main. 23, an octopus pipe 24 for removing bubbles and the like, a filter 27 for removing dust and the like, a connector 25 for connecting the catheter 26, or a three-way stopcock as required can be provided in any order. These drip cylinders, filters, mixed injection pipes, etc. are usually detachably connected by an infusion main. In the case of a removable infusion line, there was a risk that germs would enter the infusion line when it was assembled at the medical site. In a preferred infusion line of the present invention, a drip tube, a filter, a mixed injection tube and the like are fixedly connected to the infusion main tube by adhesion or welding. The fixed connection of the drip tube, the filter, the mixed injection tube, etc. eliminates the need to assemble the infusion line at the medical site and reduces the risk of invasion of bacteria.

Since the contact hole 8 of the rubber member 7 provided in the opening 13 of the branch pipe 2 of the needleless mixed injection pipe for infusion according to the present invention is normally closed, the medicinal solution or the like flows into the infusion main. During the operation, the chemical solution does not leak from the opening of the branch pipe and various bacteria do not enter.

When the side injection pipe 12 is attached to the mixed injection pipe, the side injection pipe is pushed into the branch pipe opening 13 of the needleless mixed injection pipe for infusion of the present invention without attaching a needle to the tip of the side injection pipe.
As a result, the contact hole of the rubber member 7 is opened, and the side injection pipe enters into the branch pipe and is connected. After the side casting pipe is connected, the close contact hole of the rubber member tries to restore to its original shape, so the outer wall of the side injection pipe and the inner wall of the close contact hole of the rubber member come into close contact with each other, and There is no leakage of chemicals or invasion of germs.

As described above, since the side infusion tube can be connected to the mixed infusion tube without using a puncture needle, the needle will not be accidentally put on the skin when operated by a doctor or a nurse. Further, since the contact hole of the mixed injection tube is normally closed, various bacteria do not enter when the side injection tube is not connected.

Further, in the needleless mixed injection tube for infusion of the present invention having a needle-shaped tube, when the side-injection tube is pushed into the branch tube opening, the contact hole of the rubber member collides with the tip of the needle-shaped tube. When the side-injection pipe is pushed further in, the tip of the needle-shaped tube spreads out the contact hole of the rubber member, and finally the tip of the needle-shaped tube penetrates the rubber member and is fitted inside the side-injection tube. And the mixed injection tube is connected. In a needleless mixed injection tube for infusion having a needle-shaped tube, the needle-shaped tube pushes the side injection tube lightly into the opening of the branch tube and the needle-shaped tube expands the contact hole of the rubber member. The side injection pipe and the mixed injection pipe can be connected more easily than the less mixed injection pipe. Further, when the side-injection pipe is connected to the mixed injection pipe, the side-injection pipe fits with the needle-shaped pipe, so that the side-injection pipe is less likely to come off from the mixed-injection pipe.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION A needleless mixed injection tube for infusion according to the present invention will be described with reference to the drawings. 1 is a sectional view of a needleless mixed injection tube for infusion according to a first embodiment of the present invention, and FIG. 2 is a sectional view of a needleless mixed injection tube for infusion according to a second embodiment of the present invention.
3 to 4 are cross-sectional views showing a state in which a side injection pipe is connected to a side injection pipe connecting portion of the infusion liquid needleless injection pipe of FIG. 2, and FIG. 5 is another embodiment of the infusion needleless injection pipe of the present invention. FIG. 6 is a sectional view showing a mode of a rubber member, and FIG. 7 is a view showing a mode of a needle-shaped tube.

First Embodiment A needleless mixed injection tube for infusion according to the first embodiment of the present invention will be described. The needleless mixed injection tube for infusion of the present embodiment is for connecting the side infusion tube or the syringe 12 to the infusion main. The mixed injection pipe is composed of a mixed injection main pipe 1, a branch pipe 2 and a rubber member 7. The mixed injection main pipe and branch pipe are made of rigid polyvinyl chloride. The mixed injection main pipe and the branch pipe are joined and formed in a y-shape so that the mixed injection main lumens 5 and 6 and the branch pipe lumen 15 communicate with each other. Infusion mains 3 and 4 are adhered and joined to the end opening of the mixed injection main. A rubber member 7 made of an antibacterial agent-containing silicone rubber having a close-contact hole 8 formed in the center is fitted in the opening of the branch pipe.

To connect the side injection pipe or the syringe to the needleless mixed injection pipe for infusion of the first embodiment, the side injection pipe or the syringe is pushed into the opening of the branch pipe and the contact hole of the rubber member is expanded. To do. You can easily connect to a mixed injection tube without attaching a needle to the end of the side injection tube or syringe,
The chemical solution did not leak from the close contact hole.

Second Embodiment A needleless mixed injection tube for infusion according to a second embodiment of the present invention will be described. The needleless mixed injection tube for infusion according to the second embodiment is provided with a needle tube 9 on the inner side of the rubber member 7 in the first embodiment. The needle tube 9 has a conical shape and is made of hard polyvinyl chloride. Since the tip of the needle tube is sharp, the rubber member can be easily pierced. The length of the needle tube is about 15 mm. Rubber member 7
Is a truncated cone shape that can cover from the tip to the base of the needle-shaped tube, and is made of an antibacterial compounded silicone rubber. A close contact hole 8 is formed in the rubber member at a substantially central portion thereof, and the tip of the needle-shaped tube can be guided so as to pierce the rubber member at a substantially central portion. The rubber member is
Normally, the contact hole is closed to prevent sterilization from entering from the outside and prevent leakage of the drug solution flowing into the mixed injection tube. Then, when the side injection tube or the syringe is pressed against the rubber member from the outside, the inside of the rubber member collides with the tip of the needle-shaped tube, and when the side injection tube or the syringe is further pushed, the rubber member is spread by the needle-shaped tube, The needle-shaped tube projects from the rubber member, and as shown in FIG. 4, the needle-shaped tube is fitted in the lumen of the side-injection tube or the syringe, and the side-injection tube or the syringe and the mixed injection tube are connected.

In the second embodiment, since the tip of the needle-shaped tube is recessed further than the edge of the branch tube opening, the tip of the needle-shaped tube does not hurt the skin. In the second embodiment, a screw portion is provided on the outer surface of the branch pipe so that the screw portion can be screwed with the screw portion formed inside the cover of the side injection pipe.

When a side injection tube with a cover is connected to the needleless mixed injection tube for infusion of the second embodiment as shown in FIG. 4,
Even if the needle was not attached to the tip of the side injection pipe, the side injection pipe and the mixed injection pipe could be connected without requiring a strong force. In addition, the chemical solution does not leak from the branch pipe opening when it is not connected to the side injection pipe of the branch pipe of the mixed injection pipe, and since the adhesion hole of the rubber member is sealed, invasion of germs can be prevented. , It was able to effectively prevent the infection of patients. In addition, it is the same as that of the second embodiment except that the shapes of the needleless mixed injection pipe tooth for infusion and the mixed injection main pipe and the branch pipe of the embodiment shown in FIGS. 5, 8 and 9 are changed. .

[0027]

The needleless mixed injection tube for infusion according to the present invention,
It is possible to connect and disconnect the side-injection tube or syringe in an aseptic manner, and since the operator who connects the side-injection tube or syringe does not accidentally puncture the skin with the needle, it is possible to inject the drug solution into the patient. It can be preferably used.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a needleless mixed injection tube for infusion according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a needleless mixed injection tube for infusion according to a second embodiment of the present invention.

3 is a cross-sectional view showing a state immediately before connecting a side injection pipe or a syringe to the branch pipe of the infusion needleless mixed injection pipe of FIG.

4 is a cross-sectional view showing a state in which a side injection pipe or a syringe is connected to a branch pipe of the infusion needleless mixed injection pipe of FIG.

FIG. 5 is a cross-sectional view showing another embodiment of the infusion needleless mixed injection tube of the present invention.

FIG. 6 is a view showing a mode of a rubber member.

FIG. 7 is a view showing a mode of a needle tube.

FIG. 8 is a sectional view showing another embodiment of the needleless mixed injection tube for infusion according to the present invention.

FIG. 9 is a cross-sectional view showing another embodiment of the infusion needleless mixed injection tube of the present invention.

FIG. 10 is a view showing an embodiment of an infusion line equipped with the infusion needleless mixed injection tube of the present invention.

[Explanation of symbols]

 1 ・ ・ Mixed injection main 2 ・ ・ Branched pipe 3 ・ ・ Infusion main (downstream) 4 ・ ・ Infusion main (upstream) 5,6 ・ ・ Mixed main lumen 7 ・ ・ Rubber member 8 ・ ・ Adhesion hole 9 ・・ Needle tube 10 ・ ・ Hole 11 ・ ・ Side injection tube or syringe cover 12 ・ ・ Side injection tube or syringe 13 ・ ・ Branch tube opening 14 ・ ・ Screw part 15 ・ ・ Branch tube lumen

Claims (3)

[Claims] 1. A mixed infusion main pipe, a branch pipe, and a transfusion mixed injection pipe having a rubber member, wherein (A) the mixed injection main pipe and the branch pipe each have a lumen communicating from one end to the other end. (B) The branch pipe is connected to the side part of the mixed injection main pipe so that one end of the branch pipe communicates with the lumen of the mixed injection main pipe, and a rubber member is fitted to the opening of the other end. And (C) a needleless mixed injection tube for infusion, wherein the rubber member has a contact hole formed therein. 2. The needleless mixed injection tube for infusion according to claim 1, further comprising a needle-shaped tube, wherein (D) the needle-shaped tube is a tube having a lumen, the proximal end of which is a needle-shaped tube. The inner diameter of the branch pipe is smaller than the inner diameter of the branch pipe and is connected to the inner surface of the branch pipe that is deeper than the portion where the rubber member of the branch pipe is fitted so that the lumen and the lumen of the branch pipe communicate with each other. A needleless mixed injection tube for infusion, comprising: 3. An infusion line comprising the needleless mixed infusion tube for infusion, the drip tube and the filter according to claim 1 or 2, and an infusion main which fixedly connects these.