JPS62186871A - Tube body equipped with plug separable by breaking - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] ■ Background of the Invention (Technical Field) The present invention relates to a pipe body equipped with a stopper that can be broken and separated, and in particular, the present invention relates to a pipe body equipped with a stopper that can be broken and separated, and particularly relates to a pipe body that is equipped with a stopper that can be separated by breaking. The present invention relates to a tube including a stopper that can be separated and a protector fitted over the stopper.

Prior Art> Some branch pipes, such as four-way branch pipes used in blood bags, etc., are generally used one after the other, rather than using a plurality of branch pipes at the same time. In this case, the unused branch pipe must be completely sealed with a stopper or the like to prevent the flow path from being contaminated by the unused branch pipe. Next, when using the branch pipe, it is necessary to easily break and remove the stopper to open the branch pipe and connect it to another member such as a bottle needle.

For this reason, a 40,000 branch pipe with a click cap has been proposed. This device is equipped with a clip cap as a stopper that covers the opening of the tube, and the tube can be easily opened by folding or twisting the clip cap.

This clip cap uses the heat from autoclave sterilization to create a blocking bond without using adhesive for the connection to the pipe body, so it is made of polyvinyl chloride (
It is made using a relatively soft material such as pvc). For this reason, when an external force is applied during the manufacturing process or during transportation, the product may be accidentally damaged or the threaded portion may be contaminated. Furthermore, if the plug is made of a relatively soft material, there is a problem in that when the plug is threaded off, the entire plug is twisted and difficult to cut and remove.

II The first aspect of the present invention is to improve the problems mentioned in the clip cap in a pipe body such as a four-way branch pipe with a clip cap, and to solve the problems during manufacturing, storage and transportation, and even in use. The cap and cap protector are designed to prevent accidental damage or contamination, and are easy to grasp and thread, and can be broken and separated when the tube body is exposed during use. An object of the present invention is to provide a tube body having the following features.

■ Structure of the Invention In order to achieve the above objective, the present invention provides a tube having at least two open ends, a relatively soft stopper having an open end and a closed end. In a tube that is attached to a predetermined opening of the body, a stopper is fixed to the opening of the tube for a predetermined length from the open end to the closed end, and the stopper is has a thin-walled fragile part that breaks away from the surface fixed part toward the closed end to allow separation of the plug from the pipe body, and further fits at least 11η on the outside of the plug to secure the plug. This tube body is equipped with a breakable and separable stopper characterized by having a relatively hard protective body.

Here, it is preferable that the open end of the tube body protrudes from the thin-walled fragile portion of the plug body toward the closed end side of the plug body.

Furthermore, it is preferable that the cross-sectional shape of the plug body is other than a perfect circle.

(2) Detailed Description of the Invention The present invention will now be described in detail with reference to preferred embodiments shown in the drawings.

The tube of the present invention may be of any type as long as it has at least two openings, but in the following description, a generally widely used four-way branch tube will be used as a representative example.

FIG. 1 shows an embodiment of the tubular body of the present invention, and is an enlarged view of the internal portion indicated by the dotted line in FIG. 4a. It is a partial cross-sectional plan view of a 40,000-branch pipe. In FIG. 1, for example, the first opening Cl11 is connected to the blood collection needle 24 (see FIG. 4a), the second opening 12 is connected to the first blood bag 20 (see FIG. 4a), and the third opening 13 is connected to the second blood bag. 21 (see Figure 4a), and the fourth opening [1
Reference numeral 14 indicates a four-way branch pipe to which the stopper 2 is attached.

Here, depending on the direction of the main flow path of the tube 1, the blood sampling needle 24 side is called the proximal end side, and the second, third, and fourth opening sides are called the distal side.

The present invention provides a stopper 2 and a protector 30 which is a protector for the stopper.
The main part of the present invention will be explained in detail with reference to FIG. 2 below.

FIG. 2a is an exploded cross-sectional view of the fourth opening 4, the plug body 2, and the plug protector 30, and FIG. 2b is an assembled cross-sectional view of the fourth opening portion 4 with the plug body 2 and the plug protector 30 fixed. It is a diagram.

The fourth opening 4 of the four-way branch pipe has a small diameter part 5 at its tip, in which the outer wall of the pipe body has a step and the outer diameter is reduced, for attaching the plug body 2 .

The plug body 2 has an open end 7 at one end, a closed end 8 at the other end, and a small diameter inner wall part 9 fixed to the small diameter part 5 of the tube body on the open end 7 side. , the closed end 8 side has a large diameter inner wall portion 10 with a larger inner diameter. The plug 2 also has a thin weakened portion 1 on its outer periphery that breaks to allow separation of the plug 2.
Includes 5.

Here, it is preferable that the cross-sectional shape of the stopper is other than a perfect circle on the distal side of the closed end 8. Figures 3a and 3b
The figures are respectively A-A line, B-B line in Fig. 2a,
A cross-sectional view is shown. That is, the cross section of the small-diameter inner wall portion 9 of the plug body 2 that is in close contact with the small-diameter portion 5 of the tube body 1 is a substantially perfect circle having an inner diameter that is approximately the same as the outer diameter of the small-diameter portion 5, as shown in FIG. 3a. It is preferable that the cross-sectional shape of the other portions, at least on the distal side of the closed end 8 of the stopper, is other than a perfect circle. Third
Figure b shows an example in which the tip of the stopper (grip part) is square. The cross-sectional shape of the stopper 2 may be any shape, such as a rectangle or an oval, as long as it is easy to grasp.

Furthermore, the tube body 1 of the present invention is fitted with a protector 30 that fits on the outside of the plug body 2. The protector 30 has a second a
In the figure, four parts are formed with an open part on one side and a closed part on the other side, and these 4! ! An example is shown in which a portion of the first part fits into the outer diameter of the plug. The shape of the protector 30 is not limited to that shown in the drawings, and may be a sheath-like tube having a hollow portion, with a portion of the hollow portion fitting into the outer diameter of the stopper.

Further, in order to easily grasp the protector 30 and break and remove the stopper 2, it is preferable that the outer shape of the gripping portion of the protector 30 is a non-perfect circle such as a square or an oval.

FIG. 2b shows a state in which the plug body 2 with the protector 30 fitted thereon is fitted into the fourth opening 4. At this time, the small-diameter tube portion 5 comes into close contact with the small-diameter inner wall portion 9 of the plug, and a gap 3 is formed between the tubes [1] between the end 6 and the large-diameter inner wall portion 10 of the plug. When the plug is broken due to this gap 3, the end 6 between the tubes does not become an obstacle and is easy to break.

The protector 30 sufficiently protects the plug 2 from external forces, and when the protector 30 is gripped and the plug 2 is broken and removed,
It is necessary that the protector 30 and the plug 2 are fitted tightly together so that they do not slip.
It is preferable that there is a gap between the inner wall of the protector 30 and the outer wall of the stopper 2, and that the inner wall of the protector 30 and the outer wall of the stopper 2 fit together from the thin fragile portion 15 to the closed end 8 side of the stopper.

In particular, if the thin-walled fragile portion 15 is configured to have a gap between the inner wall of the protector 30 and the outer wall of the plug 2, the plug 2 will be easily broken when the plug 2 is broken.

When not in use, the fourth opening [114 is sealed by the stopper 2 fitted with the protector 30, but the fourth opening D1
If it becomes necessary to connect other parts to 4, plug body 2
The thin-walled fragile portion 15 is broken or removed by cutting or threading. This provides fluid communication between the tube 1 and other members.

When the protector 30 is grasped and the plug body 2 is broken and removed by the thin-walled fragile portion 15, if the tube opening end 6 is configured to protrude from the cut end of the plug body remaining after the plug body 2 is broken, the tube can be removed. When trying to connect another member such as a bottle needle to the exposed open end 6 of the body 1, not only is the connection easy because the open end 6 is visible, but the connecting member such as the bottle needle is The possibility of touching the cut end surface of the plug body 2 that is contaminated is also reduced, and contamination of the tube channel can be avoided.

Although the thin-walled fragile portion 15 may be located anywhere between the open end and the closed end of the plug, it is preferably provided on the outer wall corresponding to the large-diameter inner wall portion 10 of the plug. The cavity 3 is provided on the outer wall corresponding to the large-diameter inner wall lO.
Since the thin-walled fragile portion 15 is present above the plug body, even a relatively soft plug body can be easily twisted, so that the plug body 2 can be easily threaded or broken and removed.

The fit between the plug 2 and the protector 30 is such that when the protector 30 is grasped and the plug 2 is broken and removed, the plug can be threaded without slipping between the plug 2 and the protector 30. It can be anything.

Polycarbonate or soft PVC resin is generally used for medical tubes. When a stopper is fixed to such a tube, it is preferable not to use an adhesive at the part where the stopper and the tube are fixed in order to prevent contamination of the fluid in the tube, such as blood, as much as possible. For this purpose, the tube body and the plug body are made of the same material, and the heat generated during autoclave sterilization is used to bond them in a blocking manner.

In this case, since the plug is made of relatively soft vinyl chloride resin or the like, when the plug is grasped and broken and removed, the entire plug is twisted, making it difficult to thread the plug. Therefore, in the present invention, the protector 30 is preferably made of a hard material in order to facilitate the breaking and removal of the plug. It is also advisable to select a material for the protector that will not block the tube body and plug body due to the heat generated during autoclave sterilization. Polypropylene resin or the like is used as the hard material. As a preferable example that satisfies these conditions, the tube body 1 is made of polycarbonate,
It is preferable that the stopper 2 be made of polyvinyl chloride and the protector 30 be made of polypropylene.

The combination of materials for the tube body 1, plug body 2, and protector 30 is not limited to those described above, and any appropriate combination can be used.

■ Physical function of the invention The protector 30 and the stopper 2 as illustrated in FIG.
In the case where the tubular body 1 equipped with the tube body 1 is used for plasmapheresis therapy, its effect will be explained below.

First, as shown in Fig. 4a, all the cleaners 16, 17, and 18 of the Y-shaped set 22 are closed, and the bottle 2 filled with physiological saline is
7, pierce the bottle needle on the side of the cleanser 16 of the Y-shaped set 22. After opening the clamp 16 and loosening the clamp 18 to fill the Y-shaped set 22 with physiological saline, the clamp 18 is closed.

During the operation up to this point, the plug body 2 of the tube body 1 of the present invention, whose enlarged view of the internal portion indicated by the dotted line in FIG. 4a is shown in FIG. 1, is in an unbroken state, and the outside of the plug body 2 The protector 30 is fitted. For this reason, when manufacturing the pipe 1, using the plug 2, etc.
The tube body opening 4 will not be contaminated due to accidental breakage.

The first opening 11 of the tube l communicates with the blood collection needle 24, the second opening 12 with the first blood bag 20, and the third opening 13 with the second blood bag 21 via the click tip 19.

The click tip 19 is also in an unbroken state, and the flow path to the second blood bag 21 is blocked.

Next, connect the connector of Y type set 22 to the tube body! It will be communicated to.

Before grasping and threading the protector 30 on the stopper 2, the tube to the first blood bag 20 is stopped midway with a stop clench 29 so that the medical solution in the first blood bag 20 does not flow backward.

Next, the protector 30 on the plug body 2 is grasped, and the plug body 2 is threaded or broken from the thin-walled fragile portion 15 and removed. Conventionally, when gripping and twisting the stopper 2 without the protector 30, the stopper was easily deformed, especially in the case of a stopper made of a soft material, and it was difficult to remove by threading. Since the protector 30 is made of a cured resin such as polypropylene, when the protector 30 is gripped and rotated, the stopper fitted into the protector 30 can be opened.
It does not easily deform even if you apply force, and is easy to remove.

If the tube opening end 6 is configured to protrude from the thin-walled fragile portion 15 of the plug 2, when the protector 30 on the plug 2 is grasped and the plug 2 is broken and removed from the thin-walled fragile portion 15, the gap between the tubes [1 The end 6 protrudes from the cut end surface of the plug body 2. Next, a Y-type set connector is connected to the protruding opening 6. At this time, since the opening part 6 is visible and protrudes, connection can be easily performed, and contamination can be avoided because other parts are not touched.

Next, blood is collected from the blood donor 23. At this time, the tube immediately adjacent to the blood collection needle 24 is stopped with a Kocher 28, and the blood collection needle 24 is punctured into the vein of the blood donor 23.

After confirming that blood has entered the blood collection tube, remove the cochlear 28 and the stop clemme 29 to connect the flow path to the first blood bag 20.

The flow path to the second blood bag 21 is closed, and blood collected through the blood collection needle 24 is collected into the first blood bag 20 by gravity blood collection.

Next, as shown in FIG. 4b, after sufficient blood has been collected into the first blood bag 20, the flow path to the first blood bag 20 is sealed using a tube sealer or two aluminum rings (not shown). , the first blood bag 20 is separated. The whole blood in the separated first blood bag 20 is centrifuged.

During this time, the blood donor 23 is given a Y-shaped set 22 from the physiological saline bottle 27. Physiological saline is dripped through the fourth opening 4 of the tubular body 1 and through the saliva collection needle 24.

The separated concentrated platelets and concentrated red blood cells are discharged from the blood bag by Y 1% I1. Set 22 Clemme 17
The blood is then transfused back to the donor 23 through the Y-shaped set 22 and tube body 1 through the blood collection needle 24.

After the return blood transfusion is completed, the click tip 19 is broken, the flow path to the second blood bag 21 is opened, and the blood donor 2
Blood is collected into the second blood bag 21 through the blood collection needle 24 inserted into the blood collection needle 3. The blood collected in the second blood bag 21 is centrifuged and separated in the same manner as in the first blood bag 20.
Each operation of return transfusion is repeated.

(2) Effects of the Invention The tube body of the present invention has a stopper that can be broken and separated, and a protector having a recess shaped to fit the stopper, so that it has the following effects.

(1) Protect the plug from external forces during the manufacturing process and transportation,
The plug will not be damaged or the channel inside the tube will not be contaminated until just before the plug is used.

(2) With the protector fitted to the outside of the stopper, the gap between the pipe bodies [1
Since the section can be opened [1], there is no risk of contamination when it is opened when used as a blood cell return section, etc.

(3) Since the protector is fitted to the outside of the stopper, the handle can be made larger than without the protector, and the opening operation is easier.

Furthermore, if the open end of the tube protrudes from the thin-walled fragile part of the plug body toward the closed end side of the plug body, the plug body can be broken from the thin-walled fragile part and other equipment, etc., can be inserted into the open end. It is easy to fit in and the flow path inside the tube will not be contaminated.

Furthermore, if the thin-walled fragile portion of the plug is provided on the outer wall corresponding to the large-diameter inner wall of the plug, twisting of the waist of the plug can be tolerated even if the plug is made of a relatively soft material. It is easy to thread the plug body.

Furthermore, if the outer diameter of the gripping portion of the protector is made into a shape that is not a perfect circle, it becomes easier to grip and break the protector.

[Brief explanation of drawings]

FIG. 1 is a partially sectional plan view showing an embodiment of a tube body provided with a breakable and separable stopper according to the present invention. FIG. 2a is an exploded sectional view of the stopper, tube and protector of the present invention. FIG. 2b is a cross-sectional view showing the assembled state of the stopper, tube, and protector shown in FIG. 2a. FIGS. 3a and 3b are a cross-sectional view taken along line A-A and line B-B of FIG. 2a, respectively. FIG. 4a and FIG. 4b are blood sampling system diagrams when used in the tubular plasma exchange therapy of the present invention. Explanation of symbols 1... Tube body, 2... Plug body, 3... Cavity part, 4... Fourth opening part, 5... Small diameter part,
6...Between pipe bodies [1 end, 7...Between plug bodies [I gas], 8...Blug body closed end, 9...Small diameter inner wall part,
10--Large diameter inner wall portion, 11--First opening, 12
...Second opening, 13...Third opening [1, 14-...Fourth opening, 15-...Thin weak part, 16.17.18...Cleaning, 19...Click tip, 20--First blood bag, 21--Second blood bag, 22-Y type set, 23--Blood donor, 24--
Blood collection needle, 25--Blood bag outlet, 27--Physiological saline bottle, 28--Kochel, 29-
・Stop cremme,

Claims (3)

[Claims] (1) A tube having at least two openings,
In a tube body in which a relatively soft plug body having an open end and a closed end is attached to a predetermined opening of the tube body, the plug body extends a predetermined length from the open end to the closed end side of the tube body. furthermore, the plug has a thin-walled fragile portion that breaks away from the fixed portion toward the closed end to allow separation of the plug from the tube body; 1. A tube having a breakable and separable plug, characterized by having a relatively hard protector that fits on the outside of the tube to protect the plug. (2) The open end of the tube body protrudes from the thin-walled fragile portion of the plug body toward the closed end side of the plug body.
A tube body equipped with a stopper that can be broken and separated as described in 2. (3) A pipe body equipped with a breakable and separable plug body according to claim 1 or 2, wherein the cross-sectional shape of the plug body is a shape other than a perfect circle.