JPH08224315A - Connecting device - Google Patents

Abstract

PURPOSE: To communicate an outer syringe and an inner syringe under a sterilized condition, by providing with a seal body which seals the intermediate part of an outer syringe, the inner syringe whose upper part is made to be a needle part for penetrating the seal body, and a seal ring which is fitted to either of the inner circumference of the lower part of an outer syringe and the outer circumference of the upper part of the inner syringe to seal the lower edge part of the outer syringe. CONSTITUTION: An outer syringe 21 of a connecting device 19 is arranged in the vertical direction and is opened at upper/lower end parts, and is composed of an upper member 26 constituting the upper part and a lower member 27 constituting the lower part. An inner syringe 23 is arranged in the vertical direction and is opened at upper/lower end parts, and the upper part side is inserted to the lower part of the outer syringe 21 movablly in the vertical direction. The inner syringe 23 is composed of a needle part 44 for constituting the upper part, body part 45 for constituting intermediate part in the vertical direction by linkage arranging them in the vertical direction, and a connecting part 45 for constituting the lower part. A seal ring 24 is made of a rubber with a circular shape section, and is in contact with the inner circumference face of the outer syringe 21 with slidingly movablly in the vertical direction to seal the lower end part in the outer syringe 21, and at the same time, fitted to the circumference groove 50 of the inner syringe 23 to be positioned on the upper part side of the inner syringe 23.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a connecting device.

[0002]

2. Description of the Related Art At the time of infusion, which is a kind of medical treatment, a rubber puncture port of a drug solution bag is usually punctured with a needle connected to a transfer tube.
The drug solution bag and the transfer tube are communicated with each other, and the drug solution in the drug solution bag is guided to the transfer tube via a needle. The needle and the puncture opening are covered with a cap or the like before use.
However, since the cap and the like are removed during use, the needle and the puncture opening are once exposed to the outside air. This is an opportunity for various bacteria to enter the patient's body.

In order to eliminate this opportunity and keep the chemical solution bag and the transfer tube in a state of maintaining sterility, a connecting device as shown in FIG. 5 has been used so far between the chemical solution bag and the transfer tube. It had been. The connecting device comprises a connecting tube 61 and a bending rod 62. Connection tube 6
1 is provided in the drug solution bag and connected to the transfer tube. The bent rod 62 is fixed in the connection tube 61 and has a thin portion 63. When used, the thin portion 63 is folded so that the upper and lower portions of the bent rod 62 in the connection tube 61 communicate with each other. By the way, currently, the connection tube 61
Polyethylene is often used for liquid medicine packaging materials such as and liquid medicine bags.

On the other hand, in order to make the bending rod 62 bendable, it is necessary to manufacture it from a hard plastic material such as ABS resin instead of polyethylene. However, if the bent rod 62 is made of a material different from that of the connection tube 61, the bent rod 62 cannot be heat-welded to the connection tube 61, and an adhesive must be used to fix the two. However, the use of an adhesive causes a problem that it is necessary to consider the influence of the components of the adhesive on the chemical solution. An object of the present invention is to provide a connection device that can solve the above problems.

[0005]

In order to achieve the above object, the features of the present invention are that they are arranged in the vertical direction,
An outer cylinder that opens at the upper and lower ends, a seal body that seals the vertical middle part inside the outer cylinder, and a vertically arranged seal that opens at the upper and lower ends, and the upper side moves up and down in the lower part of the outer cylinder. Is inserted movably in the direction, the upper part is fitted to one of the inner cylinder that is a needle part that pierces the seal body, the inner peripheral surface of the outer cylinder lower part and the outer peripheral surface of the inner cylinder upper side, It has a seal ring that slidably contacts the other side in the vertical direction and seals the lower end of the outer cylinder. The inside of the space between the seal body and the seal ring in the outer cylinder may be positive pressure. Also, when the inner cylinder is pushed into the outer cylinder on the other of the inner peripheral surface of the lower part of the outer cylinder and the outer peripheral surface of the upper part of the inner cylinder, the air between the seal body and the seal ring in the outer cylinder is removed. An escape groove that escapes from the lower end opening to the outside may be formed in the vertical direction. Furthermore, the upper part of the outer cylinder is provided in the chemical solution bag,
The outer cylinder and the drug solution bag may be made of the same plastic material.

[0006]

When the inner cylinder is pushed into the outer cylinder, the needle portion of the inner cylinder pierces the seal body, and the outer cylinder and the inner cylinder communicate with each other. At this time, since the inside of the space between the seal body and the seal ring in the outer cylinder has a positive pressure, the outside air does not enter the inside of the space, and the air inside the space escapes from the escape groove to the outside.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a CAPD (Continuous Ambulatory Pedal).
ritoneal Dialysis. It is also called continuous walking peritoneal dialysis. ) Shows system, peritoneal catheter 1, extension tube 2, CAPD
Set 3 for. The peritoneal catheter 1 is placed in the abdominal cavity 5 of the patient, and is separably connected to the extension tube 2 via the connector device 6. Extension tube 2
Has a roller clamp 7. CAPD set 3
Is a disposable type, the chemical solution bag 9 filled with the CAPD solution, the drainage bag 10, the Y-shaped branch tool 11, and 3 connected to the three connection parts of the branch tool 11.
The book has transfer tubes 12 to 14 and the like.

The transfer tube 12 is detachably connected to the extension tube 2 via the connector device 16. Each transfer tube 13, 14 has a clamp 17, 18,
The transfer tube 13 is connected to the drug solution bag 9 via the connection device 19, and the transfer tube 14 is connected to the drainage bag 10.
Connected to. Chemical solution bag 9, each tube 2, 12-1
4 is made of polyethylene. As shown in FIGS. 2 to 4, the connection device 19 includes an outer cylinder 21, a seal body 22, and an inner cylinder 2.
3, an outer cylinder 21 and an inner cylinder 2 having a seal ring 24 and the like.
3 is made of polyethylene. In addition, in the present specification, for convenience, “upper”, based on the states shown in FIGS. 2 and 3,
Although “down” is described, the connection device 19 may be used upside down from the state shown in FIG. 2 or the like, or may be used in an oblique or horizontal state.

The outer cylinder 21 is arranged in the up-down direction and opens at the upper and lower ends (both ends in the axial direction), and the upper member (base-side member, first member) constituting the upper part (base) thereof. 26
And a lower member (a tip side member, a second member) 27 that constitutes a lower portion (tip side). Upper / lower members 26, 27
Are integrally molded, but the outer cylinder 21 may be integrally molded as a single member. The upper end portion of the lower member 27 is inserted into the lower end portion of the upper member 26 and bonded by heat welding or an adhesive. The upper and lower members 2
6,27 may be screwed. The upper end portion of the upper member 26 is inserted between the peripheral edges of the two sheets 29 that form the chemical solution bag 9, and is heat-welded to both peripheral edges when the peripheral edges are heat-welded. A flange portion 30 for holding an outer cylinder is provided so as to project radially outward from an outer peripheral surface of an intermediate portion in the vertical direction of the upper member 26. From the inner peripheral surface of the lower portion of the upper member 26, a cylindrical connection port 31 having a stepped small diameter with respect to the upper side is provided so as to protrude downward. A fitting groove 32, which is adjacent to the connection port 31 in the radial direction, is formed on the inner peripheral portion of the upper member 26 over the entire circumference.

The lower member 27 is thin and is easily elastically deformable in the radial direction. From the upper end of the lower member 27, a ring-shaped projecting portion 34 is provided so as to project inward in the radial direction, and the projecting portion 34 closes the lower end opening of the fitting groove 32. Only the lower end of the mating groove 32 is opened radially inward. An upper stopper portion 35, which projects inward in the radial direction and is located below the lower end portion of the upper member 26, is formed on the inner peripheral surface of the intermediate portion in the vertical direction of the lower member 27 over substantially the entire circumference. The inner peripheral surface of the upper stopper portion 35 is tapered downward, and a stopper surface having a flat surface shape is formed at the upper end. An escape groove 36 located above the seal ring 24 is formed in the vertical direction on the inner peripheral surface of the intermediate portion of the lower member 27 in the vertical direction. The escape grooves 36 are formed by cutting out a part of the upper stopper portion 35 and are single or plural (in the illustrated example, single). In the case of plural escape grooves 36, they are arranged at equal intervals in the circumferential direction. To be done.
A ring-shaped lower stopper portion 37 protruding inward in the radial direction is formed at the lower end portion of the lower member 27.

The seal body 22 includes a mounting portion 39 and a seal portion 4.
It consists of zero. The mounting portion 39 has a ring shape that constitutes the outer peripheral portion of the seal body 22 and is made of rubber.
Before fixing 6, 27, they are press-fitted into the fitting groove 32 of the outer cylinder 21 through elastic deformation and closely contact with the inner surface of the fitting groove 32 and the protruding portion 34, and the lower end portion of the inner peripheral portion thereof is fitted. It is a ring-shaped fixed portion 42 that projects radially inward from the joint groove 32.
The mounting portion 39 may be adhered to the inner surface of the fitting groove 32 and the protruding portion 34 with an adhesive. The seal portion 40 is formed into a disc shape and is made of polyethylene, and is fixed to the mounting portion 39.
The lower end opening of the connection port 31 is hermetically sealed by being heat-welded to the lower surface of the connection port 31 of the outer cylinder 21 while being bonded to the upper surface of the connection port 2 with an adhesive. The seal portion 40 may be adhered to the lower surface of the connection port 31 with an adhesive.

The inner cylinder 23 is arranged in the vertical direction and opens at the upper and lower ends (both ends in the axial direction), and the upper side (tip end side) thereof is vertically in the lower part of the outer cylinder 21. It is movably inserted. The inner cylinder 23 has a needle portion 44 constituting an upper portion (tip portion) thereof, a main body portion 45 constituting an intermediate portion in the vertical direction, and a connecting portion 46 constituting a lower portion (base portion) in the vertical direction (axial direction). It is formed by connecting them in series. The needle portion 44 is the main body portion 45.
Which has a smaller diameter than that of the seal body 22 and is perforated.
The tip has a sharp conical shape.

The outer diameter of the upper end surface of the main body portion 45 is made slightly smaller than the inner diameter of the lower stopper portion 37 of the outer cylinder 21, and the outer peripheral surface of the upper end portion thereof projects radially outward. The engaging portion 48 is formed over the entire circumference. The outer peripheral surface of the upper engaging portion 48 is tapered upward,
At the lower end, an engaging surface which is downwardly planar and is engageable with the upper stopper portion 35 is formed. A lower engaging portion 49 that projects radially outward is formed on the outer peripheral surface of the main body portion 45 near the upper portion over the entire circumference. An outer peripheral surface of the lower engaging portion 49 is tapered upward, and an engaging surface having a downward planar shape is formed at a lower end thereof, and the engaging surface is the outer cylinder 2.
By engaging with the lower stopper portion 37 of 1, the inner cylinder 23 is prevented from being separated downward from the outer cylinder 21. When the inner cylinder 23 is inserted into the outer cylinder 21, the lower engaging portion 4 of the inner cylinder 23 is inserted.
The tapered outer peripheral surface of 9 is the lower stopper portion 37 of the outer cylinder 21.
By sliding on the inner peripheral edge of the inner cylinder 23, the lower stopper portion 37 of the outer cylinder 21 expands radially outward by elastic deformation, and the inner cylinder 23
Are easily inserted into the outer cylinder 21. A circumferential groove 50 having a semicircular cross section is formed on the outer peripheral surface between the upper and lower engaging portions 48, 49 of the main body 45 over the entire circumference. A flange portion 51 for holding the inner cylinder is formed at a lower end portion of the main body portion 45 so as to project radially outward.

The outer peripheral surface of the connecting portion 46 is directed downward.
While being tapered, the transfer tube 13 is fitted and connected to the connecting portion 46. Seal ring 24
Is made of rubber having a circular cross section, is fitted in the circumferential groove 50 of the inner cylinder 23, is located on the upper side of the inner cylinder 23, and is made of the outer cylinder 2
1 is slidably abutted on the inner peripheral surface of the outer peripheral surface of the outer cylinder 21
The lower end of the inside is hermetically sealed, whereby the space 53 between the seal body 22 and the seal ring 24 in the outer cylinder 21 is hermetically sealed. The inside of the closed space 53 is set to a positive pressure slightly higher than the atmospheric pressure and is sterilized in this state, and the inside of the space 53 is in a sterile state.

In the above embodiment, both the flange portions 30 and 51 are held and the inner cylinder 23 is pushed into the outer cylinder 21 during infusion. At this time, the seal body 2 in the outer cylinder 21
Since the inside of the space 53 between the 2 and the seal ring 24 has a positive pressure, the outside air does not enter the space 53 at the time of pushing, and there is no chance of contamination by the above-mentioned invasion, and the air in the space 53 Since it escapes to the outside from the escape groove 36 of the outer cylinder 21 through the lower end opening, the pushing of the inner cylinder 23 is not hindered. When the inner cylinder 23 is pushed in, the inner cylinder 2
3, the outer peripheral surface of the upper engaging portion 48 of the outer cylinder 21 and the upper stopper portion 3 of the outer cylinder 21.
Although the inner peripheral surface of 5 contacts, the outer peripheral surface and the inner peripheral surface of the outer peripheral surface of the outer peripheral surface of the outer cylinder 2 are tapered.
The portion of the upper stopper portion 35 in FIG. 1 expands radially outward while elastically deforming, and the upper engaging portion 48 easily gets over the upper stopper portion 35.

[0016] In this way, the engagement surface of the upper engagement portion 48 and the stopper surface of the upper stopper portion 35 are engaged with each other to prevent the inner cylinder 23 from retreating downward. Furthermore,
Even if the inner cylinder 23 is pushed in, the seal ring 24 of the inner cylinder 23 comes into contact with the inner peripheral surface of the upper stopper portion 35 of the outer cylinder 21 to prevent the inner cylinder 23 from being pushed in. Therefore, the inner cylinder 2
3 is held in a state of being pushed into the outer cylinder 21 by a substantially constant amount. As a result of the inner cylinder 23 being pushed in, as shown in FIG. 3, the needle portion 44 of the inner cylinder 23 is moved to the seal portion 4 of the seal body 22.
The outer cylinder 21 and the inner cylinder 23 are communicated with each other by drilling 0. FIG.
Then, for the sake of clarity, the broken portion of the seal portion 40 is omitted. Further, at the time of punching, the needle portion 4 of the inner cylinder 23
Since the seal portion 40 is in close contact with the outer peripheral surface of 4, the CAPD liquid is unlikely to leak downward from the gap between the needle portion 44 and the connection port 31.

As described above, when the seal body 22 is punched by pushing the inner cylinder 23 into the outer cylinder 21, the outer cylinder 21 is opened.
The inside of the space 53 between the seal body 22 and the seal ring 24 in the inside is positive pressure, outside air does not enter, and due to the entry of air, various bacteria do not mix into the space 53, and the inside of the space 53 is sterile. Since it is sterilized in the state, the outer cylinder 21
And the inner cylinder 23 can be communicated in a sterile state. If the clamps 7 and 17 are opened and the clamps 18 are closed before the communication, the chemical solution bag 9 is connected to the outer cylinder 21, the inner cylinder 23,
The CAPD solution is injected into the abdominal cavity 5 of the patient via the transfer tube 13, the branching tool 11, the transfer tube 12, the connector device 16, the extension tube 2, the connector device 6, and the catheter 1.

In the embodiment, the chemical solution bag 9, the tubes 2, 12 to 14, the inner cylinder 23, the outer cylinder 21, and the seal member 22 are used.
The sealing portion 40 of 1 is manufactured from polyethylene, which is the same material, but may be manufactured from other same plastic materials. Further, since the inner cylinder 23 is not fixed to the chemical solution bag 9, the inner cylinder 23 may be made of a material different from that of the outer cylinder 21 and the chemical solution bag 9. INDUSTRIAL APPLICABILITY The present invention can be applied to an infusion system in a hospital operated by a doctor, but is more effective in the CAPD system outside a hospital operated by a patient who has less medical knowledge, and is more effective in mixing bacteria. Opportunities can be reduced, and the incidence of infectious diseases caused by contamination can be reduced.

[0019]

As described in detail above, according to the present invention,
The outer cylinder and the inner cylinder can communicate with each other in a sterile condition. Further, unlike a bent rod, there is no restriction on the material, and the material of the outer cylinder and the like can be made the same as the chemical liquid packaging material such as the chemical liquid bag. Therefore, when the outer cylinder or the like is fixed to the liquid medicine packaging material, it can be fixed by heat welding without using an adhesive. Therefore, it is not necessary to consider the influence of the components of the adhesive on the liquid medicine. According to claim 2, at the time of punching the seal body by pushing the inner cylinder, in the outer cylinder,
Air does not enter from the outside into the space between the seal body and the seal ring, and there is no chance of contamination by the above invasion. According to the third aspect, the air between the seal body and the seal ring in the outer cylinder does not prevent the inner cylinder from being pushed into the outer cylinder.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a CAPD system showing an embodiment of the present invention.

FIG. 2 is a sectional view of the main part.

FIG. 3 is an operation state diagram of the main part.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 9 chemical | medical solution bag 12-14 transfer tube 19 connecting device 21 outer cylinder 22 seal body 23 inner cylinder 24 seal ring 36 escape groove 44 needle part

Claims (4)

[Claims] 1. An outer cylinder which is arranged in the vertical direction and opens at the upper and lower ends, a seal body which seals a vertically intermediate portion in the outer cylinder, and an upper and lower ends which are arranged in the vertical direction. The inner cylinder is opened and the upper side is movably inserted in the lower part of the outer cylinder in the vertical direction, and the upper part is the needle part that pierces the seal body, the inner peripheral surface of the outer cylinder lower part and the inner cylinder upper part. And a seal ring which is fitted to one of the outer peripheral surfaces on the side and slidably abuts on the other outer surface to seal the lower end portion in the outer cylinder. 2. The connecting device according to claim 1, wherein the inside of the space between the seal body and the seal ring in the outer cylinder has a positive pressure. 3. On the other of the inner peripheral surface of the lower part of the outer cylinder and the outer peripheral surface of the upper part of the inner cylinder: When the inner cylinder is pushed into the outer cylinder,
The connection device according to claim 1 or 2, wherein an escape groove for allowing air between the seal body and the seal ring to escape to the outside from the lower end opening of the outer cylinder is formed in the vertical direction. 4. The connecting device according to claim 1, wherein the upper part of the outer cylinder is provided in the chemical liquid bag, and the outer cylinder and the chemical liquid bag are made of the same plastic material.