WO2011024725A1

WO2011024725A1 - Connection device and infusion tube set

Info

Publication number: WO2011024725A1
Application number: PCT/JP2010/064093
Authority: WO
Inventors: 康之本間; 勝俊黒瀬
Original assignee: テルモ株式会社
Priority date: 2009-08-27
Filing date: 2010-08-20
Publication date: 2011-03-03
Also published as: JP5607637B2; JPWO2011024725A1

Abstract

An infusion tube set (1) is provided with a connection device (70) which is located on the upstream side and comprises a connector (50) connected to a chemical container (20) and a holder (60), a connector (2A) which is located downstream from the connector (50), and a tube (30) which couples the connector (50) and the connector (2A). The connector (50) has a sharp needle point (501) at the upper end thereof, and is provided with a connector body (502) connected to a connection portion (201) of the chemical container (20), a tube connection portion (503) provided on the lower end side of the connector body (502), a syringe connection portion (504) provided so as to protrude laterally from an outer peripheral portion of a lower end portion of the connector body (502), and a holder attachment portion (508) provided between the connector body (502) and the tube connection portion (503) and having a plurality of flanges (507).

Description

Connecting device and infusion tube set

The present invention relates to a connection device and an infusion tube set.

An infusion tube set used when administering an infusion to a patient is known. The infusion tube set is located on the upstream side, and is connected to the connection part of the chemical solution container and is composed of an upstream connector and a holder, a downstream connector located downstream from the upstream connector, and an upstream connector And a tube connecting the downstream connector.

The holder of the connecting device is a member that maintains the connection state between the chemical container and the upstream connector. This holder has two engaging parts, one of which is engaged with the connecting part of the chemical container and the other is engaged with the engaging part on the upstream connector side, thereby connecting to the chemical container. It is possible to prevent the upstream connector that has been removed from dropping out of the chemical solution container.

However, in the conventional connection device (upstream connector and holder), for example, in order to cope with a plurality of types of chemical liquid containers having different forms and dimensions, it is necessary to prepare a plurality of types of holders in accordance with each, In addition, each time the upstream connector is connected to the chemical solution container, a holder corresponding to the chemical solution container must be selected, and there is a problem that it takes time and labor to mount the holder.

In order to solve such a problem, the holder is provided with three or more engaging portions (for example, protrusions), and two engaging portions to be engaged are selected according to the chemical container to which the upstream connector is connected. Therefore, a connection device that can handle a plurality of types of chemical liquid containers has been proposed (see, for example, Patent Document 1).

However, in the connection device described in Patent Document 1, since the holder is provided with a plurality of engaging portions, when the holder is mounted, the engaging portion that is not used may become an obstacle and cannot be mounted. In addition, it is necessary to select an engaging part to be used from among a plurality of engaging parts of the holder, and to change the position and orientation of the holder accordingly. is there.

Japanese Utility Model Publication No. 6-42679

An object of the present invention is to provide a connection device and an infusion tube set that can be used for various chemical liquid containers and have excellent operability.
In order to achieve the above object, the present invention provides a connector having a chemical liquid container connection part detachably connected to a connection part of the chemical liquid container, and a plurality of first engagement parts,
A holder having a second engagement portion that engages with the connection portion, and a third engagement portion that engages with any one of the plurality of first engagement portions;
In the connected state in which the chemical liquid container connection part of the connector is connected to the connection part of the chemical liquid container, the first engaging parts are arranged in parallel along the connection direction of the chemical liquid container connection part,
In the connected state, the second engaging portion is engaged with the connecting portion, and the connector and the third generated according to the position of the portion of the connecting portion engaged with the second engaging portion. A predetermined first engaging portion is selected from the plurality of first engaging portions according to a positional relationship with the engaging portion, and the third engaging portion is placed on the first engaging portion. The connecting device is configured to be engaged.

In the connection device of the present invention, it is preferable that each of the first engaging portions also serves as a non-slip means for the connector.

In the connection device of the present invention, the chemical container connecting portion has a longitudinal shape,
Each of the first engaging portions preferably has a plate shape.

In the connection device of the present invention, the number of the first engaging portions is preferably 2 to 10.

In the connection device of the present invention, the connector has an injection means connecting portion to which a liquid injection means for injecting liquid can be connected,
It is preferable that the injection means connecting portion is provided so as to protrude laterally from a base end portion of the chemical solution container connecting portion.

In the connection device of the present invention, the connector is provided on the proximal end side of the chemical solution container connection portion, and has a tube connection portion to which a tube can be connected.
Each of the first engaging portions is preferably provided between the chemical solution container connecting portion and the tube connecting portion.

In the connecting device of the present invention, when the thickness of the third engaging portion is D, the gap distance between the two adjacent first engaging portions is in the range of 0.96D to 2D. It is preferably set to a value.

In the connection device of the present invention, the connection portion of the chemical solution container has a stopper,
The chemical container connecting portion of the connector has a sharp needle tip at its tip,
It is preferable that the chemical solution container connecting portion is configured to be in the connected state by piercing the stopper.

In the connection tool of the present invention, the holder has a connecting portion that connects the second engaging portion and the third engaging portion,
The second engaging portion has a pair of protruding pieces provided so as to protrude sideways from one end of the connecting portion,
It is preferable that the third engaging portion has a pair of projecting pieces provided so as to project sideways from the other end of the connecting portion.

In order to achieve the above object, the present invention provides the connection device of the present invention,
A downstream connector located downstream of the connector;
An infusion tube set comprising: a tube having one end connected to the downstream connector and the other end connected to the connector.

FIG. 1 is a plan view showing an embodiment of an infusion tube set of the present invention. FIG. 2 is a diagram showing an example of a usage state of the infusion tube set shown in FIG. FIG. 3 is a perspective view showing a downstream connector in the infusion tube set shown in FIG. 1. FIG. 4 is a diagram (a cross-sectional view taken along line AA in FIG. 3) sequentially illustrating the operation process of the downstream connector in the infusion tube set shown in FIG. 5 is a diagram (a cross-sectional view taken along line AA in FIG. 3) sequentially illustrating the operation process of the downstream connector in the infusion tube set shown in FIG. FIG. 6 is a view (a cross-sectional view taken along line AA in FIG. 3) sequentially illustrating the operation process of the downstream connector in the infusion tube set shown in FIG. FIG. 7 is a diagram (a cross-sectional view taken along line AA in FIG. 3) sequentially illustrating the operation process of the downstream connector in the infusion tube set shown in FIG. 8 is a view (a cross-sectional view taken along line AA in FIG. 3) sequentially illustrating the operation process of the downstream connector in the infusion tube set shown in FIG. FIG. 9 is a perspective view showing an upstream connector in the infusion tube set shown in FIG. 1. 10 is a longitudinal sectional view showing an upstream connector in the infusion tube set shown in FIG. FIG. 11 is a perspective view showing a holder in the infusion tube set shown in FIG. FIG. 12 is a longitudinal sectional view of a connecting portion of the chemical solution container shown in FIG. 13 is a perspective view showing a state in which the upstream connector in the infusion tube set shown in FIG. 1 is connected to the chemical solution container shown in FIG. FIG. 14 is a perspective view showing a state where the upstream connector in the infusion tube set shown in FIG. 1 is connected to another chemical container. FIG. 15 is a perspective view showing a state in which the upstream connector in the infusion tube set shown in FIG. 1 is connected to another chemical container.

Hereinafter, the connecting device of the present invention and the infusion tube set of the present invention including the connecting device will be described in detail based on preferred embodiments shown in the accompanying drawings.
FIG. 1 is a plan view showing an embodiment of the infusion tube set of the present invention, FIG. 2 is a diagram showing an example of the usage state of the infusion tube set shown in FIG. 1, and FIG. 3 is in the infusion tube set shown in FIG. 4 is a perspective view showing the downstream connector, and FIG. 4 to FIG. 8 are diagrams sequentially showing the operation process of the downstream connector in the infusion tube set shown in FIG. 1 (cross-sectional view taken along line AA in FIG. 3). 9 is a perspective view showing an upstream connector in the infusion tube set shown in FIG. 1, FIG. 10 is a longitudinal sectional view showing an upstream connector in the infusion tube set shown in FIG. 1, and FIG. 11 is shown in FIG. The perspective view which shows the holder in the infusion tube set to show, FIG. 12 is a longitudinal cross-sectional view of the connection part of the chemical | medical solution container shown in FIG. 2, FIG. 13 shows the connector of the upstream in the infusion tube set shown in FIG. Medicinal solution Perspective view showing a state of connecting to the vessel, 14 and 15 are perspective views showing a state of connecting the upstream side of the connector to another drug solution container in the infusion tube set shown in FIG.

In the following, for convenience of explanation, except for the upstream connector, the upper side in FIGS. 1, 2, and 9 to 15 is “base” or “upper”, and the lower side is “tip” or “lower”. 3 to 8, the right side is referred to as “base end” and the left side is referred to as “tip”. With respect to the upstream connector, the upper side in FIGS. 1, 2, 9, 10, and 13 to 15 is “tip” or “upper”, and the lower side is “base” or “lower”. To tell.

An infusion tube set 1 shown in FIG. 1 is a device that administers an infusion such as a drug solution L to a living body.
The infusion tube set 1 is located on the upstream side, a connector (medical solution container side connector) 50 that is an upstream connector connected to the chemical solution container 20 and a connection device 70 having a holder 60, and located on the downstream side of the connector 50. A connector 2A, which is a downstream connector, and a tube 30 for connecting (connecting) the connector 50 and the connector 2A are provided. Further, a clamp 40 that closes the portion of the tube 30 may be attached. The clamp 40 is configured to press and hold the tube 30 from the outside and to close the inside of the tube 30.

In the infusion tube set 1 having such a configuration, the chemical liquid (liquid) L flows from the connector 50 through the tube 30 to the connector 2A with the clamp 40 removed. The chemical liquid L flowing into the connector 2A passes through the connector 2A and is discharged.

Hereinafter, each component will be described in sequence, but first, the connection part 201 of the chemical solution container 20 will be described.

As shown in FIG. 2 and FIG. 12, the chemical container 20 has a connection portion 201, which includes a cylindrical connection portion main body 202 and a plug installed in the connection portion main body 202. And a body (elastic plug) 203.

The plug body 203 is made of an elastic material and can be punctured by a connector main body 502 of the connector 50 described later so that the connector main body 502 can be inserted.

The connecting portion main body 202 has a cylindrical shape, and an engaging portion (fourth engaging portion) that can engage with an engaging portion (second engaging portion) 602 of a holder 60 described later at the center thereof. Step) is formed as a step portion 204. The step portion 204 is formed over the entire circumference along the circumferential direction of the connection portion main body 202.

The elastic material constituting the plug body 203 is not particularly limited, and for example, the same material as the valve body 5 described later can be used.

As shown in FIGS. 1, 9, and 10, the connector 50 has a sharp needle tip 501 at the upper end (tip), and is detachably connected to the connection portion 201 (see FIG. 12) of the chemical solution container 20. From the outer peripheral portion of the connector main body (chemical solution container connecting portion) 502, the tube connecting portion 503 provided on the lower end side (base end side) of the connector main body 502, and the lower end portion (base end portion) of the connector main body 502 to the side. A syringe connecting portion (injection means connecting portion) 504 provided so as to protrude toward the opposite side, and provided between the connector main body 502 and the tube connecting portion 503, and a plurality (six in the illustrated configuration) of flanges (first) A holder mounting portion 508 having an engaging portion) 507.

The connector main body 502 is configured by a longitudinal hollow body (bottle needle) having a sharp needle tip 501 at the upper end, and an infusion inflow path 505a and an infusion outflow path 506a are formed therein. The connector main body 502 can pierce the plug 203 (see FIG. 12) made of an elastic material in the connection portion 201 of the chemical solution container 20. Thereby, the connector 50 can be connected to the chemical solution container 20. That is, when the connector main body 502 pierces the plug 203, the connector main body 502 of the connector 50 is connected to the connecting portion 201 of the chemical solution container 20 (hereinafter also simply referred to as “connected state”).

The infusion inflow path 505a is a flow path for transferring the chemical solution in the prefilled syringe 80 into the chemical solution container 20 that can store the chemical solution. The upper end opening 505b of the infusion inflow channel 505a is open to the outer periphery of the upper end (tip) of the connector main body 502. Via the upper end opening 505b, the infusion channel 505a communicates with the inside of the chemical liquid container 20, and the chemical liquid can flow into the chemical liquid container 20. Further, the infusion flow path 505a has a linear shape along the longitudinal direction of the connector body 502. The prefilled syringe 80 is a syringe filled with a chemical solution in advance.

The infusion outflow channel 506 a is a channel for transferring the chemical solution L stored in the chemical solution container 20 to the tube 30. The upper end opening 506b of the infusion outflow passage 506a opens below the upper end opening 505b of the infusion inflow passage 505a to the outer peripheral portion of the upper end portion of the connector main body 502. Via the upper end opening 506b, the infusion outflow path 506a communicates with the inside of the chemical liquid container 20, and the chemical liquid L in the chemical liquid container 20 can flow out into the infusion outflow path 506a. Moreover, the infusion outflow channel 506a forms a straight line along the longitudinal direction of the connector body 502.

Such an infusion inflow path 505a and an infusion outflow path 506a do not cross each other, that is, are independent of each other.

The holder mounting portion 508 is provided at the lower end of the infusion outflow passage 506a. This holder mounting portion 508 is provided with six flanges 507 on the outer peripheral portion of a tubular portion, and the flow path inside thereof is in communication with the infusion outflow passage 506a. The holder mounting portion 508 will be described in detail later.

The tube connection part 503 is provided at the lower end of the holder attachment part 508. The tube connection portion 503 is a tubular portion, and the flow path inside the tube connection portion 503 communicates with the infusion outflow path 506a via the flow path inside the holder mounting portion 508. The tube connection portion 503 can be connected to the proximal end portion 303 of the tube 30 (see FIG. 1). Thereby, the inside of the tube 30 and the infusion outflow channel 506a communicate.

The syringe connection part 504 is provided in the lower end part of the infusion flow path 505a. The syringe connection portion 504 is a tubular portion protruding toward the side (right side in FIG. 10), and the flow path inside the syringe connection portion 504 communicates with the infusion inflow path 505a. The mouth portion 801 of the prefilled syringe 80 can be connected to the syringe connection portion 504. Thereby, the inside of the prefilled syringe 80 and the infusion flow path 505a communicate.

In the syringe connection portion 504, a valve body 5 having a self-occlusion property made of an elastic material is installed. When the mouth part 801 of the prefilled syringe 80 is inserted into the syringe connection part 504, the valve body 5 is pressed and deformed by the mouth part 801 and is in an open state. Thereby, a chemical | medical solution can be made to flow in into the infusion inflow path 505a from the opening | mouth part 801 of the prefilled syringe 80. FIG.

Examples of the elastic material constituting the valve body 5 include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, urethane rubber, silicone rubber, and fluorine rubber. Various rubber materials can be used, and one or more of these can be used in combination. By using such an elastic material, moderate elasticity can be obtained on the top surface 511 of the valve body 5. Thereby, when the mouth part 801 of the prefilled syringe 80 is connected to the syringe connection part 504, the end surface of the mouth part 801 and the top surface 511 can be in liquid-tight contact.

As shown in FIG. 10, the valve body 5 includes a tubular body portion 55 and a head portion 51 provided integrally with one end portion of the body portion 55.

The head portion 51 has a bottomed cylindrical shape, and includes a lumen portion 515 through which a chemical solution can pass and a slit (opening / closing portion) 512 that reaches the lumen portion 515 from the flat top surface 511. Is formed. The slit 512 has a substantially single character shape. Since the shape of the slit 512 is simple as described above, the top surface 511 is deformed when the top surface 511 is pressed, so that the slit 512 is easily opened. Further, when this pressing is released, the top surface 511 is restored, and thus the slit 512 is reliably closed. Thus, the valve body 5 has a self-occlusion property.

In addition, such an operation of the slit 512 allows the flow path in the syringe connection portion 504 to be easily and reliably sealed / unsealed.

Further, since the top surface 511 is flat, when the mouth portion 801 of the prefilled syringe 80 is connected, the top surface 511 can be easily sterilized in advance.

The trunk portion 55 is formed of a cylindrical body having a bellows shape. That is, the body 55 has a bellows shape in which the large-diameter ring portion 552 and the small-diameter ring portion 553 are alternately arranged in the axial direction in the outer shape. Such a trunk | drum 55 functions as a deformation | transformation part which urges | biases the valve body 5 toward the head 51 side from the trunk | drum 55 side.

Since the body portion 55 functions as a deforming portion in this way, it is not necessary to separately provide the connector 50 with a component for configuring the biasing means, contributing to a reduction in the number of components and a simplification of the structure. Can do.

Moreover, although this trunk | drum 55 bears most of the restoring force which the valve body 5 restores toward the head 51 side from the trunk | drum 55 side, the head 51 bears a part of the restoring force. May be.

The constituent material of the connector 50 (excluding the valve body 5) is not particularly limited. For example, polyolefin such as polypropylene and ethylene-vinyl acetate copolymer, polyurethane, polyamide, polyester, polycarbonate, acrylonitrile-butadiene-styrene. Various hard resin materials, such as a copolymer (ABS resin), are mentioned.

The connector main body 502, the holder attaching portion 508, and the tube connecting portion 503 are arranged substantially coaxially, that is, along the axial direction of the connector main body 502. Hereinafter, the holder mounting portion 508 will be described.

The holder attaching portion 508 is a portion to which an engaging portion (third engaging portion) 603 (see FIG. 11) of the holder 60 described later is attached, and has six plate shapes that can be engaged with the engaging portion 603. A flange 507 is provided. Each flange 507 has a circular shape or a shape in which a part of the circle is cut out in plan view (when viewed from the upper side in FIG. 1) in the illustrated configuration. Needless to say, it is not limited to.

Each flange 507 is provided on the lower end side of the connector main body 502, that is, between the connector main body 502 and the tube connecting portion 503. That is, a predetermined interval is provided between the lower end portion of the connector main body 502 (the base end portion of the syringe connecting portion 504) and the upper end portion of the tube connecting portion 503 along the connecting direction of the chemical solution container connecting portion (connector main body 502). And they are installed side by side.

In the illustrated configuration, the flanges 507 are arranged in parallel at equal intervals so as to be parallel to each other and perpendicular to the longitudinal direction of the connector main body 502.

The interval (gap distance d) between the two adjacent flanges 507 is not particularly limited and can be set as appropriate according to various conditions. However, the thickness of the engaging portion 603 of the holder 60 is set to D (FIG. 11). The gap distance d is preferably set to a value within the range of 0.96D to 2D, and more preferably set to a value within the range of 1.0D to 1.2D. . In the illustrated configuration, the gap distance d is set substantially equal to the thickness of the engaging portion 603 of the holder 60.

In this connection device 70, a plurality of flanges 507 on the connector 50 side are provided instead of the engaging portion 603 on the holder 60 side. Therefore, even when the gap distance d is narrowed, it is used when the holder 60 is mounted. The holder 60 can be securely attached without the hind flange not interfering.

Here, each flange 507 of the holder mounting portion 508 also serves as a gripping portion of the connector 50, and grips the flange 507 with fingers and performs an operation of connecting the connector main body 502 to the connection portion 201 of the drug solution container 20. be able to. During this operation, the flange 507 exhibits the function of anti-slip means.

Further, the number of flanges 507 is six in the illustrated configuration, but the present invention is not limited to this as long as it is plural, and may be five or less, or may be seven or more. However, the preferred number is about 2 to 10, and the more preferred number is about 2 to 8. By setting the number of the flanges 507 to the above-mentioned number, the thickness of the flange 507 can be sufficiently secured without excessively increasing the length of the connector 50, and necessary and sufficient strength can be obtained. It is also suitable as a grip part.

As shown in FIG. 1 and FIG. 11, the holder 60 is an engaging portion (second second portion) that engages with the connecting portion 201 in a connected state in which the connector main body 502 of the connector 50 is connected to the connecting portion 201 of the chemical solution container 20. Engagement portion) 602, an engagement portion (third engagement portion) 603 that engages with any of the plurality of flanges 507, and a connection portion 601 that connects the engagement portion 602 and the engagement portion 603. And have.

The connecting portion 601 has an elongated plate shape that is slightly curved. The engaging portion 602 has a pair of protruding pieces 604 formed at the upper end of the connecting portion 601 so as to protrude sideways, and the engaging portion 603 is at the lower end of the connecting portion 601. And a pair of projecting pieces 605 formed so as to project toward the side (the same direction as the engaging portion 602).

That is, the holder 60 has a U-shape when viewed from the side (when viewed from a direction perpendicular to the paper surface of FIG. 1). As a result, when the holder 60 is mounted, a relief portion of the connector 50 and the connecting portion 201 of the chemical solution container 20 is formed inside the holder 60, so that the holder 60 can be securely mounted.

Since the engaging

portions

602 and 603 are not formed in plural, but are formed one by one, when the holder 60 is mounted, the engaging

portions

602 and 603 do not get in the way, and the holder 60 It can be installed securely.

Further, the length of the holder 60 (the length in the vertical direction in FIG. 1), that is, the interval between the engaging portion 602 and the engaging portion 603 is not variable but constant.

The constituent material of the holder 60 is not particularly limited, and for example, the same material as the connector 50 can be used.

When the holder 60 is mounted, as shown in FIG. 13, in the connected state, the engaging portion 602 of the holder 60 is engaged with the stepped portion 204 of the connecting portion 201 of the chemical solution container 20, and the engaging portion 603 is connected to the connector 50. To the corresponding flange 507. At this time, the holder 60 is mounted from the side opposite to the syringe connection portion 504. Further, a portion above the stepped portion 204 of the connecting portion 201 is positioned between the two protruding pieces 604 of the engaging portion 602, and the connecting portion 201 is sandwiched between the two protruding pieces 604. Similarly, a portion between the two flanges 507 of the holder attaching portion 508 is positioned between the two protruding pieces 605 of the engaging portion 603, and the holder attaching portion 508 is sandwiched between the two protruding pieces 605. Thereby, the state in which the holder 60 is mounted can be reliably held.

By attaching the holder 60 in this way, the connector main body 502 is prevented from being detached from the connection portion 201, and the connected state is maintained.

Here, when the holder 60 is mounted, the engaging portion 602 is engaged with the stepped portion 204 of the connecting portion 201 of the chemical solution container 20 in the connected state, and the stepped portion 204 engaged with the engaging portion 602 is engaged. A corresponding predetermined flange 507 is selected from the six flanges 507 according to the positional relationship between the connector 50 and the engaging portion 603 generated according to the position (distance between the lower surface of the connecting portion 201 and the stepped portion 204). The engaging portion 603 is engaged with the flange 507. In the chemical solution container 20 having the configuration shown in FIG. 13, the uppermost flange 507 is selected, and the engaging portion 603 is engaged with the flange 507.

Further, as shown in FIG. 14, in the chemical solution container 20 having the configuration shown in FIG. 14, the third flange 507 from the upper side is selected, and the engaging portion 603 is engaged with the flange 507.

Further, as shown in FIG. 15, in the chemical solution container 20 having the configuration shown in FIG. 15, the second flange 507 from the upper side is selected, and the engaging portion 603 is engaged with the flange 507.

If the positions of the engaging portion 603 and the flange 507 do not match, the puncture depth is not substantially adjusted (the contact point between the connector main body 502 and the plug body 203 is maintained by the frictional force). By making fine adjustment using the bending due to the elasticity of the plug 203, any of the flanges 507 and the engaging portion 603 can be engaged.

In this way, even when the connector main body 502 of the connector 50 is connected to the connecting portion 201 of the chemical solution container 20 having a different form or size, the engaging portion 603 of the holder 60 is attached to one of the six flanges 507. The holder 60 can be securely mounted. That is, the common holder 60 can correspond to a plurality of types of chemical liquid containers 20 having different forms and dimensions.

As shown in FIG. 1, the tube 30 has a distal end portion 301 connected to an injection port 22 of a connector 2A described later, and a proximal end portion 303 connected to a tube connection portion 503 of the connector 50. The chemical liquid L that has flowed out of the connector 50 is supplied to the connector 2A via the tube 30.

The tube 30 is made of a flexible material, and the material is not particularly limited. For example, soft polyvinyl chloride, ethylene-vinyl acetate copolymer, polyethylene, polypropylene, polybutadiene, etc., or these Are the main materials.

As shown in FIGS. 1 and 3 to 8, the connector 2A is detachably attached to a tubular connector body 21, a lock member 3 installed on the outer peripheral side of the connector body 21, and a distal end portion of the connector body 21. And a cap 10 to be used.

As shown in FIGS. 5 to 8, the connector main body 21 is a member that has a tubular shape and forms a flow path through which the chemical liquid L passes.

As shown in FIG. 1, the connector main body 21 functions as an injection port 22 to which the proximal end portion 301 of the tube 30 is connected and the liquid medicine L that has passed through the tube 30 is injected. The injection port 22 has a tapered shape in which the outer diameter of the proximal end portion thereof gradually decreases in the proximal direction.

Also, the inside of the injection port 22 becomes a first flow path 221 through which the chemical liquid L injected from the chemical liquid container 20 via the tube 30 passes. The inner diameter of the portion of the first channel 221 excluding the tip 223 is substantially constant along the longitudinal direction. The inner diameter of the tip portion 223 of the first flow path 221 is gradually reduced toward the tip direction.

An enlarged diameter portion 222 whose outer diameter is enlarged is formed on the outer peripheral portion of the injection port 22. As shown in FIG. 1, the distal end portion 301 of the tube 30 can be connected to the injection port 22 until the distal end 302 of the tube 30 comes into contact with the enlarged diameter portion 222. Thereby, the amount of insertion of the injection port 22 into the tube 30 becomes sufficient, and the tube 30 is reliably prevented from unintentionally leaving the injection port 22.

As shown in FIG. 8, the connector main body 21 functions as a drainage port 23 for discharging the chemical liquid L whose tip has passed through the first flow path 221. The drain port 23 has an outer diameter and an inner diameter that are constant along the longitudinal direction.

The cap 10 is attached to the drainage port 23 until the chemical liquid L can pass through the second channel (drainage channel) 231 formed therein (see FIGS. 4 and 5). . And by removing this cap 10, the tubular part 901 of the connector 90 which the infusion apparatus 100a (refer FIG. 2) mentioned later has can be connected, Therefore, the inside of the tubular part 901 and the 2nd flow path 231 are connected. The chemical liquid L can be discharged from the second channel 231 into the tubular portion 901 through communication (see FIGS. 7 and 8).

As shown in FIG. 3, the cap 10 is a member that is detachably attached to the drainage port 23. The cap 10 includes a cap main body 101 having a bottomed cylindrical shape, and a grip portion 102 provided on the outer peripheral side of the cap main body 101.

The inner peripheral portion 103 of the cap main body 101 has a tapered shape in which the inner diameter gradually increases in the proximal direction. When the cap 10 is attached to the drainage port 23, the inner peripheral portion 103 of the cap body 101 is fitted to the outer peripheral portion 233 of the drainage port 23 at a portion where the inner diameter is the same as the outer diameter of the drainage port 23. (See FIGS. 4 and 5). Thereby, the cap 10 can seal the opening 232 of the drainage port 23 in a liquid-tight (air-tight) manner in a state where the cap 10 is attached to the drainage port 23. Therefore, the aseptic condition in the second channel 231 is reliably maintained.

The grip portion 102 is a ring-shaped portion provided concentrically with the cap body 101 on the outer peripheral side of the cap body 101. When removing the cap 10 in the mounted state, the removing operation can be performed by gripping the grip portion 102 and pulling it toward the distal end. A plurality of grooves 104 are formed along the longitudinal direction of the outer periphery of the grip portion 102. Thereby, it is possible to prevent a finger from slipping from the grip portion 102 when the grip portion 102 is gripped.

As shown in FIGS. 4 to 8 (the same applies to FIG. 3), the central portion of the connector body 21, that is, the injection port 22 (first flow path 221) and the drainage port (discharge port) 23 (second flow). A cylindrical portion 24 having a cylindrical shape is formed between the passage 231). The cylindrical portion 24 is disposed with respect to the connector main body 21 so that the central axis thereof is orthogonal to the central axis of the connector main body 21. The first channel 221 and the second channel 231 communicate with the lumen 241 of the cylindrical portion 24 at the same height position.

Further, an exhaust port 25 protruding in a direction orthogonal to the injection port 22 and the drainage port 23 is formed on the outer peripheral portion of the cylindrical portion 24. The exhaust port 25 has a cylindrical shape and forms a third flow path 251 through which the air G passes. The third flow path 251 communicates with the lumen 241 of the cylindrical portion 24 at the same height position as the first flow path 221 and the second flow path 231.

As shown in FIGS. 4 and 5, the first flow path 221 has changed from a state where the chemical liquid L has not yet been injected (the state shown in FIG. 4) to a state where the chemical liquid L has been injected (the state shown in FIG. 5). At this time, the air G in the first flow path 221 is pushed by the chemical liquid L, passes through the third flow path 251, and is discharged outward. Thus, the exhaust port 25 is a port that functions as an exhaust unit that exhausts the air G in the first flow path 221.

Further, the filter member 26 is fixed to the third flow path 251 through the fixing member 27 in the exhaust port 25. The filter member 26 is a member having a function of allowing the air G to pass but not the chemical liquid L to pass. The fixing member 27 may be omitted, and the filter member 26 may be directly enclosed in the third flow path 251.

When the air G is discharged, the chemical liquid L flows into the third flow path 251 together with the air G, but is blocked by the filter member 26. Thereby, it can prevent reliably that the chemical | medical solution L flows out from the exhaust port 25 unintentionally. In addition, when the chemical liquid L is a drug (for example, an anticancer drug) that has a high risk of contamination of the skin surface when it is directly touched with a hand, the skin surface such as a fingertip is contaminated with the chemical liquid L by the filter member 26. Is reliably prevented.

The filter member 26 preferably has a hydrophobic surface or is a hydrophobic film (hydrophobic film). Examples of the constituent material of the hydrophobic film include polytetrafluoroethylene (PTFE), a copolymer of tetrafluoroethylene and hexafluoropropylene (FEP), and a copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether (PFA). , Polyvinylidene fluoride (PVDF), and the like. The filter member 26 is preferably made of these materials made porous by methods such as stretching, microphase separation, electron beam etching, sintering, and argon plasma particles. Moreover, the method of the hydrophobic treatment is not particularly limited, and examples thereof include a method of coating the surface of the filter member 26 with a hydrophobic constituent material.

The fixing member 27 is a ring-shaped member. The outer diameter of the fixing member 27 is set slightly larger than the inner diameter of the cylindrical exhaust port 25, and the inner diameter is set slightly smaller than the outer diameter of the disk-shaped filter member 26. Since the fixing member 27 is positioned between the exhaust port 25 and the filter member 26, the filter member 26 is securely fixed to the exhaust port 25 via the fixing member 27, so that the filter member 26 is connected to the exhaust port 25. It is prevented from leaving.

As described above, the first flow path 221, the second flow path 231 positioned coaxially with the first flow path 221, the first flow path 221 and the second flow path 231 orthogonal to the second flow path 231. The third flow path 251 communicates with each other through the inner cavity 241 of the cylindrical portion 24. That is, the first flow path 221, the second flow path 231, and the third flow path 251 intersect with each other at the lumen 241 of the cylindrical portion 24. In the connector 2 </ b> A, the lumen 241 of the cylindrical portion 24 is an intersection where the first flow path 221, the second flow path 231, and the third flow path 251 intersect.

As shown in FIG. 4 to FIG. 8, the connector 2A is in the open / closed state of each of the first flow paths 221, the second flow paths 231 and the third flow paths 251, that is, each of the first flow paths. 221, the second flow path 231, and the third flow path 251 can be switched between communication / non-communication. The connector 2A is provided with a cock 4 as the switching means.

As shown in FIG. 3, the cock 4 includes a body portion 41, a base portion 42, and a lever 43.

The rod body 41 has a columnar shape or a cylindrical shape (columnar shape in FIGS. 4 to 8), and is fitted into the inner cavity 241 of the cylindrical portion 24 so as to be freely rotatable with air tightness or liquid tightness. Therefore, it is preferable that the outer diameter of the body 41 in a state where the cock 4 is removed from the cylindrical portion 24 is slightly larger (for example, about 1 to 6%) than the inner diameter of the cylindrical portion 24 described above. Moreover, it is preferable that the outer peripheral surface 411 of the trunk | drum 41 shall be smooth. Thereby, when the trunk | drum 41 rotates, the rotation is performed smoothly.

As shown in FIG. 4 to FIG. 8, inside the body portion 41, the first flow path 221, the second flow path 231, and the third flow path of each injection port 22, drainage port 23 and exhaust port 25 are provided. A switching flow path corresponding to the path 251 is formed in a T shape. That is, three

flow paths

44, 45, and 46 that extend in the radial direction of the body portion 41 at an angle of 90 ° are formed so as to communicate with each other in the vicinity of the center portion of the body portion 41. Further, these flow paths 44 to 46 are the first flow path 221 and the second flow path 231 of each injection port 22, drainage port 23 and exhaust port 25 in a state where the cock 4 is fitted in the cylindrical portion 24. In addition, it is formed at a height position that coincides with the third flow path 251.

The flow paths 44 to 46 are opened on the outer peripheral surface 411 of the body portion 41 to form

circular openings

441, 451, and 461, respectively. The diameters of the openings 441 to 461 are preferably substantially equal to each other, but may be different from each other.

A disc-shaped base (lever support portion) 42 having an outer diameter larger than the outer diameter of the body portion 41 is preferably formed integrally with the body portion 41 at the upper portion of the body portion 41. The base portion 42 is exposed above the cylindrical portion 24.

Further, as shown in FIG. 3, the base 42 is provided with

markers

421, 422, and 423 for displaying the opening directions of the

openings

441, 451, and 461 in the upper part of the drawing. The markers 421 to 423 are attached to positions corresponding to the openings 441 to 461, that is, above the flow paths 44 to 46 in FIG. The markers 421 to 423 have an isosceles triangle shape, and are arranged so that the tops thereof face the opening directions of the corresponding openings 441 to 461, respectively.

On the outer peripheral side of the base portion 42, a lever 43 that extends and projects in the opposite direction to the flow path 45 is preferably formed integrally with the base portion 42. The lever 43 is gripped with fingers, and torque is applied to rotate the cock 4. Accordingly, unevenness 431 for preventing slippage is formed on both side portions of the lever 43. In the present invention, the lever 43 for performing the turning operation is not limited to one extending in one direction as shown in the figure, but one extending in two or more directions, or other one such as a handle. There may be.

In the present embodiment, the cock 4 is configured to be able to freely rotate 360 ° with respect to the cylindrical portion 24, but is not limited thereto. That is, the connector 2A may be provided with a restricting means (not shown) for restricting the rotation angle range of the cock 4 with respect to the cylindrical portion 24. For example, the restricting means may be formed of convex portions that are formed on the cylindrical portion 24 and the base portion 42 and can be engaged with each other.

By opening / closing the cock 4 having such a configuration, it is possible to select opening / closing of each of the first flow path 221, the second flow path 231 and the third flow path 251.

For example, as shown in FIGS. 1 and 3, when the position of the lever 43 of the cock 4 is set in the same direction as the drainage port 23, the injection is performed as shown in FIG. 4 (the same applies to FIGS. 5 to 7). The first flow path 221 of the port 22 and the third flow path 251 of the exhaust port 25 communicate with each other via the

flow paths

45 and 46 formed in the trunk portion 41 of the cock 4, and the first flow path of the drainage port 23. The second flow path 231 is sealed by the outer peripheral surface 411 of the body portion 41. Thereby, the injection port 22 and the exhaust port 25 are opened, and the drainage port 23 is closed. Hereinafter, this state is referred to as a “first state (initial state)”.

When the lever 43 of the cock 4 is positioned in the same direction as the exhaust port 25, the first flow path 221 of the injection port 22 and the second flow path of the drainage port 23 are shown in FIG. 231 communicates with

flow paths

44 and 46 formed in the body 41 of the cock 4, and the third flow path 251 of the exhaust port 25 is sealed by the outer peripheral surface 411 of the body 41. Thereby, the injection port 22 and the drainage port 23 are opened, and the exhaust port 25 is closed. Hereinafter, this state is referred to as a “second state”.

As shown in FIGS. 4 to 7, in the initial state, when the chemical liquid L is injected from the tube 30 into the first flow path 221 of the injection port 22, the injected chemical liquid L is supplied to the first flow path. 221 flows down and flows into the

channels

44 and 46 through the channel 45 of the cock 4 while pushing the air G in the first channel 221 downstream. The chemical liquid L flowing into the flow path 46 reaches the third flow path 251 of the exhaust port 25. Due to the chemical liquid L flowing into the third flow path 251 of the exhaust port 25, the air G in the first flow path 221 is discharged through the filter member 26 of the exhaust port 25. When most of the air G is discharged, the flow of the chemical liquid L in the connector 2A, that is, the injection of the chemical liquid L from the tube 30 into the first flow path 221 of the injection port 22 stops. This stop state is maintained until the cock 4 is rotated to the second state (the state shown in FIG. 8). As described above, in the connector 2A, when the chemical liquid L is injected into the first flow path 221, the flow of the chemical liquid L is temporarily stopped before reaching (inflowing) the second flow path 231 of the drainage port 23. To do. Therefore, in the connector 2A, when the cock 4 and the cylindrical part 24 of the connector main body 21 into which the body part 41 of the cock 4 is fitted are injected into the first flow path 221, the drug solution L is injected. Before L reaches the second flow path 231, it can be said that it constitutes a blocking means (stopping means) for temporarily stopping the flow.

Further, this blocking means is configured so that the opening and closing of each of the first flow path 221, the second flow path 231 and the third flow path 251 can be selected by a simple operation of rotating the cock 4. The switching from the first state to the second state can be easily and reliably performed. Further, the timing for switching the flow path can be determined after the operator operating the cock 4 confirms that the flow of the chemical liquid L has stopped. For this reason, the connector 2A has excellent operability.

The constituent material of the connector 2A having such a configuration (excluding the filter member 26) is not particularly limited. For example, various materials such as polyester such as polypropylene, cyclic polyolefin, polycarbonate, acrylic resin, polyethylene terephthalate, and polyethylene naphthalate. Among them, resins such as polypropylene, cyclic polyolefin, and polyester are preferable because they are easily molded and have low water vapor permeability.

In particular, the constituent material of the connector main body 21 is preferably substantially transparent in order to ensure internal visibility. Thereby, the inside of the 1st channel 221 and the 2nd channel 231 can be visually recognized via the wall part of connector main part 21, Therefore, chemical solution L in connector main part 21 (connector 2A) is the said connector. It is possible to check how far the main body 21 has come. Thereby, after confirming that the chemical | medical solution L is filled in the 1st flow path 221 and the flow stopped, the cock 4 can be operated and it can switch reliably from a 1st state to a 2nd state. . Thus, the wall portion of the connector main body 21 functions as a window portion that allows the inside of the first flow path 221 and the second flow path 231 to be visible.

Further, as shown in FIGS. 4 to 8, a discoloration portion 28 is provided on the outer peripheral portion of the cylindrical portion 24 of the connector main body 21 on the opposite side to the exhaust port 25 via the central axis. This discoloration part 28 is comprised with a small piece, and is being fixed to the outer peripheral part of the cylindrical part 24 of the connector main body 21 by adhesion | attachment (adhesion by an adhesive agent or a solvent), for example.

The color changing section 28 changes color due to its own temperature change. Such a material is not particularly limited, and examples thereof include a tetrahalogeno complex and a nitrogen-containing ligand complex.

Such a color changing portion 28 is normally absorbed when the chemical liquid L is filled in the first flow path 221 of the injection port 22, and the temperature is lowered. Thereby, the color of the discoloration part 28 changes compared with before temperature falls. By this discoloration, it is visually recognized that the chemical liquid L is filled in the first flow path 221, that is, the chemical liquid L has reached a position where it can flow into the second flow path 231 (the flow of the chemical liquid L has stopped). can do. In this case, the cock 4 can be operated to reliably switch from the first state to the second state.

As shown in FIG. 3, the lock member 3 is installed below the cylindrical portion 24 of the connector main body 21 in the figure. The lock member 3 may be used depending on the configuration of the counterpart connected to the drainage port 23 from which the cap 10 is removed, that is, the lock member 3 may be connected to the counterpart or may not be used. In the present embodiment, the connector 90 of the infusion device 100a as the counterpart has a portion connectable to the lock member 3. For this reason, the lock member 3 is connected to the connector 90 together with the drainage port 23. As a result, the connector 2A and the connector 90 are firmly connected.

The lock member 3 has a long base portion 31 and a lock portion 32 that is formed to protrude from the tip portion of the base portion 31.

The base part 31 is a plate-shaped part. When the connector 2A is placed on a support base such as a table, the base portion 31 can be placed downward. Thereby, the connector 2A is stably placed on the support base.

The lock portion 32 has a shaft portion 33 having a rod shape and a pair of claw portions 34 formed on both sides of the shaft portion 33.

The shaft portion 33 is formed so as to protrude in the distal direction.
The pair of claw portions 34 are disposed to face each other via the shaft portion 33. Each claw portion 34 has a plate-like shape, and the tip portion 341 is connected to the tip portion of the shaft portion 33. Thereby, each nail | claw part 34 has elasticity, respectively, and can approach / separate mutually. When the lock member 3 is connected to the connector 90 of the infusion device 100a, each claw portion 34 can engage with a predetermined part of the connector 90, respectively.

The lock member 3 may be formed integrally with the connector body 21 or may be configured to be detachable from the connector body 21.

Next, an operation method (usage method) of the infusion tube set 1 will be described by taking as an example a case where the infusion tube set 1 is connected to the infusion device 100a.

First, the infusion device 100a will be described.
The infusion device 100a shown in FIG. 2 has a chemical solution container 101a, two connectors 90, a drip tube 102a, a roller clamp 103a, and a connector 104a, and these members are sequentially arranged from the upstream side. The members are connected to each other by

tubes

105a, 105b, 105c, 105d, and 105e. A clamp 106a is attached in the middle of the tube 105a.

The chemical solution container 101a is a container in which the infusion solution M is stored in advance. The infusion M may be the same as or different from the medicinal solution L in the medicinal solution container 20 of the infusion tube set 1.

Each connector 90 is configured to be connectable to the drainage port 23 of the connector 2A of the infusion tube set 1, that is, has a tubular portion 901.

The drip tube 102a is made of a substantially transparent material, and when the drug solution L flows into the drip tube 102a, the flow rate of the drug solution L can be visually confirmed. In addition, the drip tube 102a can store the air G that has flowed into the drip tube 102a together with the chemical liquid L, thereby preventing the air G from flowing downstream.

The roller clamp 103a adjusts the flow rate of the chemical liquid L.
The connector 104a is configured to be connectable to an indwelling needle (not shown) that has been previously placed in the patient.

The clamp 106a closes the tube 105a. The chemical solution L passes through the tube 105a by opening the clamp 106a.

The infusion device 100a having such a configuration is used in a state where the chemical solution container 101a is suspended so that the chemical solution container 101a is positioned vertically upward.

The drug solution L is not particularly limited, and is, for example, an anticancer agent, an immunosuppressive agent, or the like that is dangerous when touched by medical personnel, in addition, sedatives, intravenous anesthetics, anesthetic analgesics, local Any anesthetic, non-depolarizing muscle relaxant, pressor, antihypertensive, coronary vasodilator, diuretic, antiarrhythmic, bronchodilator, hemostatic, vitamin, antibiotic, fat emulsion, etc. In the present embodiment, the chemical liquid L is stored in the prefilled syringe 80 in a relatively high concentration, and the chemical liquid L is transferred from the prefilled syringe 80 to the chemical liquid container 20 filled with the diluent, Obtained by dilution. The method for obtaining the chemical liquid L is not limited to this, and for example, a method in which the chemical liquid L is previously stored in the prefilled syringe 80 and transferred from the prefilled syringe 80 to the empty chemical liquid container 20 can be used. . As another method, for example, the first liquid containing the component that becomes the chemical liquid L is stored in the prefilled syringe 80, and the component that becomes the chemical liquid L is contained by mixing with the first liquid. There is a method in which the second liquid is stored in the chemical liquid container 20 and obtained by transferring the first liquid from the prefilled syringe 80 to the chemical liquid container 20 and mixing the first liquid and the second liquid. It is done.

Next, the operation method of the infusion tube set 1 will be described. In addition, in this embodiment, although the case where the two infusion tube sets 1 are used is mentioned as an example, it is not limited to this, One or three or more infusion tube sets 1 can also be used.

[A1] As shown in FIG. 2, an infusion device 100a and an infusion tube set 1 are prepared. In addition, a chemical container 20 and a prefilled syringe 80 are prepared. Hereinafter, the operation of the first infusion tube set 1 will be described, but the operation method of the second infusion tube set 1 is also the same.

Here, the infusion device 100a is used as a main line for administering the medicinal solution L to the patient, that is, a line through which the infusion solution M mainly as a basic solution or the like flows, and each infusion tube set 1 is used as an auxiliary line, The case where it uses as a line through which the dangerous chemical | medical solution L will be poured when a medical worker, such as a cancer agent and an immunosuppressant, touches by mistake will be described as an example. An indwelling needle is placed in advance in a blood vessel (for example, a peripheral vein) of the patient.

[A2] The connector 104a of the infusion device 100a is connected to an indwelling needle placed in the patient's blood vessel.

[A3] The clamp 106a of the infusion device 100a is opened to prime the infusion device 100a.

[A4] The roller clement 103a of the infusion device 100a is operated to adjust the flow rate (administration rate) of the infusion solution M of the infusion device 100a to a predetermined indicated flow rate (indicated administration rate), and the infusion solution M is administered.

[A5] Depending on the condition of the patient, the infusion tube set 1 (drainage port 23 of the connector 2A) used to administer, for example, an antibiotic at regular intervals is used as the infusion device 100a (tubular portion 901 of the connector 90). First, the connector 50 of the infusion tube set 1 is connected to the chemical solution container 20 (see FIG. 2). The chemical solution container 20 may be empty or may be prefilled with physiological saline or the like.

Specifically, first, the connector main body 502 of the connector 50 is pierced through the plug 203 of the connecting portion 201 of the chemical solution container 20. Thereby, it will be in a connection state.

Then, the holder 60 is attached. That is, in the connected state, the engaging portion 602 of the holder 60 is engaged with the step portion 204 of the connecting portion 201 of the chemical solution container 20, and the engaging portion 603 is engaged with the corresponding flange 507 of the connector 50. As a result, the connector main body 502 is prevented from being detached from the connecting portion 201, and the connected state is maintained.

[A6] The prefilled syringe 80 is connected to the syringe connection portion 504 of the connector 50 connected to the chemical solution container 20, and a pusher (not shown) of the prefilled syringe 80 is pressed. Thereby, the chemical solution is transferred from the prefilled syringe 80 into the chemical solution container 20 via the connector 50.

[A7] The clamp 40 of the infusion tube set 1 is opened, the medicinal solution L in the medicinal solution container 20 is caused to flow down, and the infusion tube set 1 is primed. Thus, in the infusion tube set 1, the chemical solution L can be supplied / discharged to / from the chemical solution container 20 in a state where the infusion tube set 1 is connected to the chemical solution container 20. Thereby, for example, it is possible to omit the insertion and removal of the connector 50 every time the chemical solution L is supplied / discharged to / from the chemical solution container 20, and thus the operability is excellent.

At this time, in the connector 2A, the cap 10 is attached to the drainage port 23, and the opening 232 of the drainage port 23 is sealed. The connector 2A is in an initial state in which the first flow path 221 of the injection port 22 and the third flow path of the exhaust port 25 communicate with each other via the switching flow paths (flow paths 45 and 46) of the cock 4. (See FIG. 4).

In this state, when the chemical solution L in the chemical solution container 20 flows down, the chemical solution L sequentially passes through the connector 50 and the tube 30 and flows into the first flow path 221 of the injection port 22 of the connector 2A (FIG. 5). reference). At this time, in the connector 2 </ b> A, the air G in the first flow path 221 is discharged through the third flow path 251 of the exhaust port 25 by the chemical liquid L flowing into the first flow path 221. As the air G is discharged, the first flow path 221, the flow paths 44 to 46 of the cock 4, and the third flow path 251 are gradually filled with the chemical liquid L. Finally, the entire flow path is filled with the chemical liquid L, and the flow of the chemical liquid L is temporarily stopped. Further, at that time, the color changing section 28 changes color as described above, and the first flow path 221, the flow paths 44 to 46 of the cock 4, and the entire third flow path 251 are filled with the chemical solution L. (Stop of the flow of the chemical liquid L) can be visually recognized. Further, the second flow path 231 of the drainage port 23 is filled with the air G because it does not communicate with the first flow path and the third flow path.

[A8] When the color change of the color change part 28 is confirmed, the tube 30 of the infusion tube set 1 is sealed with the clamp 40.

[A9] The cap 10 is removed from the drainage port 23 of the connector 2A, and the sealed state with respect to the opening 232 of the drainage port 23 is released (see FIG. 6).

[A10] The drainage port 23 of the connector 2A is connected to the tubular portion 901 of the connector 90 of the infusion device 100a (see FIG. 7). At the time of this connection, as described above, the second flow path 231 is filled with the air G (in an empty state), that is, the chemical liquid L has not yet flowed into the second flow path 231. For this reason, the chemical liquid L in the connector 2A (first flow path 221) is reliably prevented from leaking or scattering from the second flow path 231. Thereby, the connection between the connector 2A of the infusion tube set 1 and the connector 90 of the infusion device 100a can be performed safely (smoothly).

[A11] Holding the lever 43 of the cock 4 of the connector 2A, the cock 4 is rotated 90 ° counterclockwise in FIG. Thereby, the exhaust port 25 is closed, and the first flow path 221 of the injection port 22 and the second flow path 231 of the drainage port 23 communicate with each other.

[A12] The clamp 40 of the tube 30 of the infusion tube set 1 is opened again. Thereby, the flow of the chemical solution L is restarted, and the chemical solution L flows from the infusion tube set 1 into the infusion device 100a. And the chemical | medical solution L which flowed into this infusion apparatus 100a is administered to a patient. As described above, in the connector 2A, after the connection between the connector 2A of the infusion tube set 1 and the connector 90 of the infusion device 100a is completed, the flow of the medicinal solution L is quickly and reliably resumed and the medicinal solution L is administered. Can do. At this time, the drip tube 102a can store the air G that has flowed into the drip tube 102a together with the chemical liquid L, thereby preventing the air G from flowing downstream.

In addition, in this embodiment, although the infusion tube set 1 is what attached the clamp 40 (refer FIG. 2), it is not limited to this, The clamp 40 may be omitted. .

As described above, according to this infusion tube set 1, when the holder 60 is attached, the connector 50 connected to the chemical solution container 20 falls off from the chemical solution container 20, that is, It is possible to prevent the connector main body 502 of the connector 50 connected to the connection unit 201 from being detached from the connection unit 201. And especially the connection tool 70 is used suitably for a connection with an infusion bag.

In addition, since the connector 50 is provided with a plurality of (six in the illustrated configuration) flanges 507, even when the connector main body 502 of the connector 50 is connected to the connecting portion 201 of the chemical solution container 20 having a different form or size. The engaging portion 603 of the holder 60 can be engaged with any one of the plurality of flanges 507, and the holder 60 can be securely attached. That is, the common holder 60 can correspond to a plurality of types of chemical liquid containers 20 having different forms and dimensions.

In addition, since a plurality of flanges 507 on the connector 50 side are provided instead of the engaging portion 603 on the holder 60 side, the operation of mounting the holder 60 can be easily performed, and the flange 507 (engagement not used) is used. The flange 507) that does not engage with the portion 603 does not get in the way, and the holder 60 can be securely attached.

Further, since the flanges 507 that are not used do not get in the way, a large number of flanges 507 can be provided, thereby increasing the types of chemical liquid containers 20 that can be handled.

For example, in the case where the length of the holder 60 can be adjusted, or in the case where a plurality of engaging portions 603 are provided on the holder 60 side, it takes time and labor to mount the holder 60. In the set 1, since the plurality of flanges 507 are provided on the connector 50 side, the holder 60 can be easily and quickly mounted.

In the present invention, the first engagement portion may be a hole or a recess, and the third engagement portion may be an insertion portion such as a protrusion inserted into the hole or the recess.

As mentioned above, although the connection instrument and infusion tube set of this invention were demonstrated based on embodiment of illustration, this invention is not limited to this, The structure of each part is arbitrary structures which have the same function. Can be substituted. In addition, any other component may be added to the present invention.

In the above-described embodiment, two flow paths (infusion inflow path 505a and infusion outflow path 506a) that are independent from each other are provided inside the connector of the connection tool. However, the present invention is not limited to this. For example, a part or all of the infusion inflow path and the infusion outflow path may be common.

Moreover, in the said embodiment, although the connector of a connection instrument has a syringe connection part (injection means connection part), in this invention, the syringe connection part may be abbreviate | omitted.

In the above embodiment, the connector connected to the drain port of the downstream connector is a tubular portion of another connector. However, in the present invention, the present invention is not limited to this. There may be. In the present invention, the configuration of the downstream connector is not limited to the above embodiment.

According to the present invention, by attaching the holder, the connector connected to the chemical liquid container falls off from the chemical liquid container, that is, the chemical liquid container connecting part of the connector connected to the connecting part of the chemical liquid container is It is possible to prevent detachment from the connection portion.
Since the connector is provided with a plurality of first engaging portions, the plurality of first engaging portions are provided even when the chemical liquid container connecting portion of the connector is connected to the connecting portion of the chemical liquid container having a different form or size. The third engagement portion of the holder can be engaged with any one of the portions, and the holder can be securely attached. That is, a common holder can be used for a plurality of types of chemical liquid containers having different forms and dimensions.
In addition, since a plurality of first engaging portions on the connector side are provided instead of the third engaging portion on the holder side, the operation of attaching the holder can be easily performed, and the first not used is used. The holder can be securely attached without the interference of the engaging portion.
In addition, since the first engaging portion that is not used does not get in the way, a large number of first engaging portions can be provided, thereby increasing the types of chemical liquid containers that can be handled. Therefore, it has industrial applicability.

Claims

A connector having a chemical liquid container connecting part detachably connected to the connecting part of the chemical liquid container, and a plurality of first engaging parts;
A holder having a second engagement portion that engages with the connection portion, and a third engagement portion that engages with any one of the plurality of first engagement portions;
In the connected state in which the chemical liquid container connection part of the connector is connected to the connection part of the chemical liquid container, the first engaging parts are arranged in parallel along the connection direction of the chemical liquid container connection part,
In the connected state, the second engaging portion is engaged with the connecting portion, and the connector and the third generated according to the position of the portion of the connecting portion engaged with the second engaging portion. A predetermined first engaging portion is selected from the plurality of first engaging portions according to a positional relationship with the engaging portion, and the third engaging portion is placed on the first engaging portion. A connecting device configured to engage.
The connection device according to claim 1, wherein each of the first engaging portions also serves as a non-slip means for the connector.
The chemical container connecting portion has a longitudinal shape,
The connecting device according to claim 1 or 2, wherein each of the first engaging portions has a plate shape.
The connecting device according to any one of claims 1 to 3, wherein the number of the first engaging portions is 2 to 10.
The connector has an injection means connecting portion to which a liquid injection means for injecting liquid can be connected,
The connecting device according to any one of claims 1 to 4, wherein the injection means connecting portion is provided so as to protrude laterally from a base end portion of the chemical liquid container connecting portion.
The connector is provided on the base end side of the chemical liquid container connection part, and has a tube connection part to which a tube can be connected,
Each said 1st engaging part is a connection instrument in any one of Claim 1 thru | or 5 provided between the said chemical | medical solution container connection part and the said tube connection part.
The gap distance between two adjacent first engaging portions is set to a value in the range of 0.96D to 2D, where D is the thickness of the third engaging portion. The connection device according to any one of 1 to 6.
The connection part of the chemical container has a stopper,
The chemical container connecting portion of the connector has a sharp needle tip at its tip,
The connecting device according to any one of claims 1 to 7, wherein the chemical liquid container connecting portion is configured to be in the connected state by piercing the stopper.
The holder has a connecting portion that connects the second engaging portion and the third engaging portion;
The second engaging portion has a pair of protruding pieces provided so as to protrude sideways from one end of the connecting portion,
The connection tool according to any one of claims 1 to 8, wherein the third engaging portion has a pair of projecting pieces provided so as to project sideways from the other end of the coupling portion. .
A connecting device according to any one of claims 1 to 9,
A downstream connector located downstream of the connector;
An infusion tube set comprising: a tube having one end connected to the downstream connector and the other end connected to the connector.