JP2006000280A - Connector for extracorporeal circulation circuit and extracorporeal circulation circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect a plurality of tubes used for a circuit section without branchs with an easy operation while maintaining a sterile condition. <P>SOLUTION: A connector 27 for extracorporeal circulation circuit comprises a male connector assembly 1, a female connector assembly 9 and a packing 6. A male ring 3 is turnable with respect to a male communicating tube 2, and a female ring 11 is slidable in the axial direction of a female communicating tube 10. By turning the male ring 3 while sealing the male communicating tube 2 and the female communicating tube 10 with the packing 6, the positions of a male ring engaging section 8 and a female ring engaging section 22 are matched in the turning direction. The female ring 11 is then moved toward and in the axial direction of the female connecting tube 2 to engage the male ring engaging section 8 with the female ring engaging section 22. In such a state, even when the male connecting tube 2 or the female connecting tube 10 is turned, the male ring 3 and the female ring 11 keep their fixed state as one. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is used in an extracorporeal circuit such as an artificial cardiopulmonary blood circuit in a circuit portion without a branching part, and an extracorporeal circuit connector for connecting a first tube and a second tube, and The present invention relates to an extracorporeal circuit using the extracorporeal circuit connector.

  Examples of the extracorporeal circuit used when circulating blood between a human body and an extracorporeal device include an artificial cardiopulmonary blood circuit and an artificial kidney blood circuit. For example, in a blood circuit for cardiopulmonary bypass, in general, the piping that forms the blood flow path is sequentially inserted from the blood removal port of the patient, through a reservoir (blood reservoir), a blood pump, a heat exchanger, an oxygenator, an arterial filter, etc. Connected to the blood inlet.

  As an extracorporeal circuit connector to be installed in such an extracorporeal circuit, as a connector interposed in the branch section, the branch section includes a branch pipe connection section connected to the branch pipe, and a book connected to the main pipe. There is known a pipe connecting part, in which a branch pipe connecting part or a branch pipe is rotatably connected to a main pipe connecting part (see, for example, Patent Document 1).

However, for example, in a circuit without a branching part such as a suction circuit that connects the blood removal port of the patient and the reservoir, a connector that connects the tube (tube body) on the blood removal port side of the patient and the tube (tube body) on the reservoir side As a straight connector, for example, both ends of the connector are bamboo shoot-shaped portions (conical portions having a step), and each of the bamboo shoot-shaped portions is connected by pushing two tubes, respectively. In order to stabilize the connection between the tube and the connector, it was fixed with a ligature band or the like.
Japanese Patent Laid-Open No. 10-263076

  However, as is conventionally done, when two tubes are pushed into each of the bamboo shoot-like portions at both ends of the connector and connected, the bamboo shoot-like portions are pushed into the open tube with the narrow ends. It was necessary, and it was difficult to push the connector into the tube while keeping the inside of the tube sterile. In particular, since the tube is usually stored in a wound state, it is difficult to push the connector into the tube while preventing the tube from twisting. Also, simply pushing the bamboo shoot-shaped part into the tube may cause the connection between the tube and the connector to become unstable, and if the tube and connector are to be connected stably, The connection of the connector was complicated and took time.

  In addition, in the conventional connection method of the tube and the connector, the relative positional relationship between the tube and the connector is fixed, and the tube is twisted during an operation or the like, which is inconvenient for the operator. In such a case, the surgeon had to endure the operation while being patient or had to reconnect the tube to the connector.

  Furthermore, conventionally, when using a plurality of circuit parts such as a blood removal circuit and a suction circuit in one extracorporeal circuit, it is difficult to identify each circuit part. In each operation, it is necessary to affix a colored tape to each circuit portion, and the work is complicated.

  The present invention solves such problems of the prior art, and it is possible to connect a plurality of tubes used in a circuit portion without a branching portion while maintaining a sterilized state by a simple operation. Provided is an extracorporeal circuit connector that can prevent the tube from being twisted even when the tube rotates during operation, and an extracorporeal circuit using the extracorporeal circuit connector. For the purpose.

For the above purpose, the present invention provides an extracorporeal circuit connector for connecting a first pipe and a second pipe used in an extracorporeal circuit,
A male connector assembly having a male side ring in which one end portion is a first tube connecting portion, and a male side ring that is attached to the outer periphery of the male side connecting tube and has a male side engaging portion;
A female side communication tube having one end portion serving as a second tubular body connection portion and a female side engagement portion that is attached to the outer periphery of the female side communication tube and engages with the male side engagement portion A female connector assembly having a ring;
A packing for sealing between the male communication pipe and the female communication pipe,
The male ring is rotatable with respect to the male communication pipe, or the female ring is rotatable with respect to the female communication pipe,
The female ring is slidable in the axial direction of the female communication pipe, or the male ring is slidable in the axial direction of the male communication pipe,
With the male connector assembly and the female connector assembly relatively moved closer to the axial direction of the male communication tube, the male ring is sealed with the seal between the male communication tube and the female communication tube. Alternatively, by rotating the female ring, the positions of the male ring engaging portion and the female ring engaging portion in the rotating direction are matched, and the male ring or the female ring is moved in the axial direction of the male communication pipe. Even if the male side communication pipe or the female side communication pipe rotates by engaging the male side ring engagement part and the female side ring engagement part by moving closer to the male side ring, the male side ring and female side The ring is an extracorporeal circuit connector characterized in that the ring is integrally maintained in a fixed state.

  According to the present invention, the male ring engaging portion and the female ring are rotated by rotating the male ring or the female ring while the gap between the male communication pipe and the female communication pipe is sealed by the packing. The position of the ring engagement portion in the rotational direction is matched, and the male ring engagement portion and the female ring engagement are achieved by moving the male ring or the female ring closer to the axial direction of the male communication tube. By engaging the part, the first tube body and the second tube body can be connected together, so that a plurality of tubes can be connected with a simple operation while maintaining a sterilized state.

  Further, the male ring is rotatable with respect to the male communication pipe, or the female ring is rotatable with respect to the female communication pipe. In the state where the side ring engaging portion is engaged, even if the male side communication tube or the female side communication tube rotates, the male side ring and the female side ring are integrally maintained in a fixed state. Therefore, the position of the first tube or the second tube changes depending on when the circuit part is moved to a position that is easy for the operator to operate during surgery or when the circuit part is moved by mistake. Or rotating, the male ring and the female ring are maintained in a fixed state as a unit, so that the sealed state of the male communication pipe and the female communication pipe can be maintained, and the other tube body It can be prevented from rotating and the first tube or the second tube is twisted. Prevented the door, it is possible to enhance the safety of the surgery.

Further, in the present invention, the female side communication pipe has a small diameter portion on one end side, a large diameter portion on the other end side, a stepped portion connecting the small diameter portion and the large diameter portion,
The male ring is rotatable with respect to the male communication pipe, the male ring cannot slide in the axial direction of the male communication pipe, and the female ring is not movable with respect to the female communication pipe. In addition to being unable to rotate, the female ring is slidable in the axial direction of the female communication tube,
The packing is fixed to the opposite end to the first tube connecting portion in the outer peripheral portion of the male communication tube,
The male ring engagement part is a notch, the female ring engagement part is a notch receiving part,
The male connector assembly is moved closer to the female connector assembly, and the male ring is rotated while the packing is in contact with the inner surface of the stepped portion of the female communication tube. By aligning the position of the part in the rotation direction and moving the female ring closer to the axial direction of the male communication pipe, the notch receiving part is fitted into the cutout part, and the male communication pipe rotates. Even if it moves, the male ring, female ring, and female communication pipe are maintained in a fixed state.
In a state where the notch receiving portion is fitted into the notch portion, a flow path having no step is formed at the connection position between the flow path of the male communication pipe and the flow path of the female communication pipe. Also good.

According to this invention, in the state where the notch receiving portion is fitted in the notch, a flow path without a step is formed at the connection position between the flow path of the male side communication pipe and the flow path of the male side communication pipe. Thus, it is possible to prevent hemolysis and the like from occurring due to blood colliding with the step in the flow path.
The male ring is rotatable with respect to the male communication pipe, the male ring cannot slide in the axial direction of the male communication pipe, and the female ring is connected to the female communication pipe. In contrast, the female ring is configured to be slidable in the axial direction of the female communication pipe, and when the notch receiving part is fitted into the cutout part, the male communication pipe is provided. The male ring, female ring, and female communication pipe are maintained in a fixed state even if they rotate, so that the male communication pipe impairs the sealing state with respect to the female communication pipe. The second tube can be prevented from rotating even if the first tube rotates during surgery, and the first tube or the second tube. Can be prevented from being twisted, and the safety of surgery can be improved.

In the present invention, a plurality of the extracorporeal circuit connectors are used, and among the extracorporeal circuit connectors, the color of the male ring or the female ring in one extracorporeal circuit connector and other The extracorporeal circuit is characterized in that the color of the male ring or the female ring in the extracorporeal circuit connector is different.
According to the present invention, in the case of using a plurality of circuit parts such as a blood removal circuit and a suction circuit in one extracorporeal circuit, it is possible to prevent each circuit part from being difficult to identify, In order to make it easy to identify, it is necessary to affix a colored tape to each circuit portion for each operation or the like, and the work can be prevented from becoming complicated.

  According to the present invention, the male ring engaging portion and the female side are rotated by rotating the male ring or the female ring while the gap between the male communication pipe and the female communication pipe is sealed by the packing. The position of the ring engagement portion in the rotational direction is matched, and the male ring engagement portion and the female ring engagement are achieved by moving the male ring or the female ring closer to the axial direction of the male communication tube. By engaging the part, the first tube body and the second tube body can be connected together, so that a plurality of tubes can be connected with a simple operation while maintaining a sterilized state.

  Further, the male ring is rotatable with respect to the male communication pipe, or the female ring is rotatable with respect to the female communication pipe. In the state where the side ring engaging portion is engaged, even if the male side communication tube or the female side communication tube rotates, the male side ring and the female side ring are integrally maintained in a fixed state. Therefore, the position of the first tube or the second tube changes depending on when the circuit part is moved to a position that is easy for the operator to operate during surgery or when the circuit part is moved by mistake. Or rotating, the male ring and the female ring are maintained in a fixed state as a unit, so that the sealed state of the male communication pipe and the female communication pipe can be maintained, and the other tube body It can be prevented from rotating and the first tube or the second tube is twisted. Prevented the door, it is possible to enhance the safety of the surgery.

Hereinafter, an extracorporeal circuit connector 27 according to an embodiment of the present invention will be described with reference to the drawings.
1-4 is a figure which shows the connection operation | movement of the connector 27 for extracorporeal circulation circuits by embodiment of this invention, and FIG. 4 has shown the state which the connection of the connector 27 for extracorporeal circulation circuits was completed. FIG. 5 is a cross-sectional view along the axial direction of the extracorporeal circuit connector 27 according to the embodiment of the present invention.

The extracorporeal circuit connector 27 according to the embodiment of the present invention includes a male connector assembly 1, a female connector assembly 9, and a packing 6.
The male connector assembly 1 is connected to the first tube (first tube) (not shown) on the operator side (patient blood removal port side) in the suction circuit of the blood circuit for cardiopulmonary bypass in the hospital. Is done.
The female connector assembly 9 is connected to a second tube (second tube) (not shown) on the instrument side (reservoir side).

The packing 6 keeps the space between the male connector assembly 1 and the female connector assembly 9 sealed.
The male connector assembly 1 includes a male communication pipe 2 having a blood flow path therein and a male ring 3 fitted to the outer periphery of the male communication pipe 2.
The male ring 3 is configured to be rotatable with respect to the male communication pipe 2 but not to slide.
The male side communication pipe 2 includes a male side communication pipe main body 28, an annular protrusion 34, and a packing engagement protrusion 35.
The male communication tube main body 28 has a flow path inside, the end on the blood removal port side of the patient is the male tube connection portion 5, and the opposite end is the female connector assembly. In the state where 9 and the male connector assembly 1 are connected, the male communication pipe connection port 4 is connected to the flow path of the female connector assembly 9.

The annular protrusion 34 is provided integrally with the male communication pipe main body 28 at a substantially intermediate portion in the axial direction of the outer peripheral portion of the male communication pipe main body 28, and a pair of flanges 16 are provided at the tip of the annular protrusion 34. , 17 are formed, and between the pair of flanges 16, 17 is an annular protrusion tip recess 36.
The packing engaging protrusion 35 is formed integrally with the male communication pipe main body 28 in the vicinity of the male communication pipe connecting port 4 on the outer peripheral portion of the male communication pipe main body 28, and is a protrusion for engaging the packing 6. It is.

The male ring 3 includes a male ring main body 29, a male ring engagement protrusion 7, and a male ring inward protrusion (flange) 18.
The male ring 3 is colored in advance, for example, purple. The male ring 3 is colored in purple when used in a blood removal circuit, for example, in green when used in a suction circuit, etc., depending on the type of circuit part. Different colors can be used.
On the engagement side (connection side) with the female ring 11 in the male ring main body 29, notches (male engagement portions) 8 are formed at four locations.

The male ring engagement protrusion 7 is an engagement side end portion with the female ring 11 in the male ring main body 29, and is located on the inner side of the male ring main body 29 at a position corresponding to the four cutout portions 8. Protrusively provided.
The male ring inner protrusion 18 is fitted into the annular protrusion tip recess 36 between the pair of flanges 16, 17 of the male communication pipe 2 (snap fit), whereby the male ring 3 is male. It is fixed to the side communication pipe 2 so as to be rotatable.

The packing 6 is fitted into the end of the outer peripheral portion of the male communication tube 2 on the male communication tube connection port 4 side. At this time, the position of the packing 6 relative to the male communication tube 2 is fixed by fitting the packing recess 37 into the packing engagement protrusion 35 of the male communication tube 2. Further, a packing hole 38 is formed in the packing 6, and is fitted into the packing hole protrusion 39 on the outer periphery of the male communication pipe 2.
The packing 6 maintains the male side communication pipe 2 and the female side communication pipe 10 by pressing the inner surface of the large-diameter portion 33 and the inner surface of the stepped portion 23 in the female side communication tube 10 as described later. Keep sealed.

The female connector assembly 9 includes a female communication tube 10 having a blood flow path therein, and a female ring 11 fitted to the outer periphery of the female communication tube 10.
The female side ring 11 is configured to be slidable with respect to the female side communication tube 10 but cannot be rotated.
The female communication pipe 10 includes a female communication pipe main body 30, a first protrusion 14, a female communication pipe engagement portion 19, a second protrusion 20, and a third protrusion 21.

  The female communication tube main body 30 has a small diameter portion 32 on the connection side with the second tube body and a large diameter portion 33 on the connection side with the male connector assembly 1. Are integrally formed through the stepped portion 23. In the large-diameter portion 33, the end portion of the male communication tube 2 on the male communication tube connection port 4 side and the packing 6 fitted in the outer periphery thereof are inserted.

One end of the female side communication tube main body 30 is a female side tube connection portion 12, and the other end is a female side communication tube connection port 13.
The first protrusion 14 is formed in the vicinity of the small diameter portion 32 on the outer peripheral portion of the large diameter portion 33.

  The female side communication pipe engaging portions 19 are provided at four positions at intervals on the other end portion (end portion on the male connector assembly 1 side) side end portion of the outer peripheral portion of the female side communication pipe main body 30. The male ring engagement protrusion 7 of the male ring 3 is rotated in an engaged state. One of these is L-shaped, and the male ring engagement protrusion 7 stops when the male ring engagement protrusion 7 hits the lateral plate portion 40 in the L shape. Is done.

  The second protrusion 20 is formed on the other end side of the first protrusion 14 on the outer peripheral portion of the female communication tube main body 30. When the female projection 11 is moved in the axial direction of the male communication tube 2 while sliding the female ring 11 on the outer periphery of the large diameter portion 33 of the female communication tube 10, the second protrusion 20 When the front end of the male ring 3 hits and gets over, the operator feels a click.

  The third protrusion 21 is formed on the outer peripheral part of the female communication pipe main body 30 in front of (in front of) the rotation direction of the male ring engagement protrusion 7 with respect to the L-shaped female communication pipe engagement part 19. The When the male ring 3 is rotating, the male ring engagement protrusion 7 is the third protrusion immediately before the male ring engagement protrusion 7 hits the L-shaped lateral plate portion (detent portion) 40. By getting over 21, it will give the operator a click feeling.

The female ring 11 includes a female ring main body 31 and a notch receiving portion (female side engaging portion) 22.
The female ring 11 is colored in advance, for example, purple. The female ring 11 is colored in purple when used in a blood removal circuit, and colored in green when used in a suction circuit. Different colors can be used.
The female ring main body 31 has four guide grooves 15 formed in the axial direction on the inner side opposite to the connection tip side, and the guide grooves 15 engage with the first protrusions 14 of the female communication pipe 10. In this state, the female ring 11 can slide in the axial direction on the large-diameter portion 33 of the female communication tube main body 30.

  The notch receiving portions 22 are provided at four locations on the connecting tip side of the female ring main body 31, and when the female ring 11 slides and approaches the male ring 3, the notch of the male ring 3 is cut. It engages with the part 8.

  In the above embodiment, the female ring 11 is slidable in the axial direction of the female communication pipe 10, and the female ring 11 cannot rotate with respect to the female communication pipe 10. The structure in which the ring 3 cannot slide in the axial direction of the male side communication pipe 2 and the male side ring 3 is rotatable with respect to the male side communication pipe 2 is shown. However, contrary to this configuration, the female ring 11 cannot slide in the axial direction of the female communication pipe 10, and the female ring 11 can rotate with respect to the female communication pipe 10. 3 may be slidable in the axial direction of the male communication tube 2, and the male ring 3 may not be able to rotate with respect to the male communication tube 2. With this configuration, the female communication tube 10 can be rotated with respect to the male communication tube 2 without impairing the hermetic state, and even if the second tube rotates during the operation or the like, the first communication tube 10 can rotate. It is possible to prevent the tube body from rotating and the like, to prevent the first tube body or the second tube body from being twisted, and to improve the safety of the operation.

Next, with reference to FIGS. 1-4, the operation | movement which connects the connector 27 for extracorporeal circulation circuits by embodiment of this invention is shown.
When this extracorporeal circuit connector 27 is used in a circuit that does not include a branching portion, the male tube connecting portion 5 of the male connector assembly 1 and the female tube connecting portion 12 of the female connector assembly 9 are respectively used. The respective ends of the first tube (first tube) and the second tube (second tube) are connected.

From the state where the male connector assembly 1 and the female connector assembly 9 are separated from each other as shown in FIG. 1, as shown in FIG. 2, the female communication tube engaging portion at the female communication tube connection port 13 of the female communication tube 10 is obtained. The notch portion 8 of the male ring 3 is aligned with the portion where 19 is absent, and the male connector assembly 1 is moved to the position where the tip of the packing 6 contacts the inner surface of the stepped portion 23 of the female communication tube 10. 9 is inserted.
As shown in FIG. 3, when the male ring 3 is rotated leftward (opposite to the clockwise direction), the male ring engagement protrusion 7 provided on the inner surface side of the notch portion 8 becomes the female communication pipe. It is guided while engaging with the engaging portion 19, and moves to the L-shaped horizontal plate portion (movement stop portion) 40 of the female communication pipe engaging portion 19 and stops.

  At this time, since the male ring engagement protrusion 7 passes over the third protrusion 21 immediately before (in front of) the lateral plate portion 40 of the female communication pipe engagement part 19, the operator can feel the click on the female side. It can be seen that the ring 11 has reached the rotation stop position.

Next, as shown in FIG. 4, when the female ring 11 is pushed into the connection side with the male ring 3 and is slid on the outer periphery of the large diameter portion 33 of the female communication tube 10, the female ring 11 is Move in the axial direction.
At this time, when the connecting tip of the female ring 11 passes over the second protrusion 20 of the female communication pipe 10, the operator can obtain a second click feeling and the female ring 11 is in a predetermined position (male). It is grasped that the position of engagement with the side ring 3 is reached.

When the female ring 11 reaches a predetermined position, the notch receiving portion 22 of the female ring 11 is fitted into the notch portion 8 of the male ring 3, and the male ring 3 and the female ring 11 are engaged. Thus, a connection lock mechanism is formed. Thereby, even if the male side communication pipe 2 rotates, the male side ring 3 and the female side ring 11 can be integrally maintained in a fixed state. Since this connection lock mechanism is apparently one ring, the completion of connection can be confirmed visually.
Since the male ring 3 is mounted so as to be rotatable with respect to the male communication pipe 2, the connection lock mechanism is rotatable with respect to the first tube body and is rotated with respect to the connected circuit. It becomes possible.
Further, in the state where the notch receiving part 22 is fitted into the notch part 8 and the connection lock mechanism is formed, a step is formed at the connection position between the flow path of the male communication pipe 2 and the flow path of the female communication pipe 10. A flow path without any gap is formed.

On the other hand, the connection between the male connector assembly 1 and the female connector assembly 9 can be released by a procedure reverse to the above operation.
That is, when the female ring 11 is pulled in the opposite direction from the connection side, the connecting tip of the female ring 11 is locked by the first protrusion 14 provided on the outer peripheral portion of the female communication pipe 10 until the movement is stopped. The axial movement is performed on the outer peripheral portion of the large-diameter portion 33 of the female communication tube 10.

At this time, the connection tip of the female ring 11 passes over the second protrusion 20 provided on the outer peripheral portion of the female communication pipe 10, so that the operator feels click and the female ring 11 is in a predetermined position. It is understood that the movement started from (the engagement position with the male ring 3).
As a result, the fitting (engagement) between the notch receiving portion 22 of the female ring 11 and the notch portion 8 of the male ring 3 is released, so that the male ring 3 rotates clockwise (clockwise). It becomes possible to move.

  When the male ring 3 is rotated until the notch 8 reaches the position where the female communication pipe engaging portion 19 of the female ring 11 is absent, the male ring engaging protrusion 7 on the inner surface side of the notch 8 is obtained. Is moved from the rotation stop position of the female side communication pipe engaging portion 19, the engagement with the female side communication pipe engaging portion 19 is released, and the male connector assembly 1 can be pulled out from the female connector assembly 9. it can. Thereby, the connection by the extracorporeal circuit connector 27 is released.

  As described above, in the extracorporeal circuit connector 27 according to the embodiment of the present invention, the male connector assembly 1 and the female connector assembly 9 are operated by the two sliding operations of the male ring 3 and the female ring 11. Since connection and disconnection to / from are performed, inadvertent connection and disconnection can be prevented, and the risk of accidents can be minimized.

  Further, the click feeling when the male ring engagement protrusion 7 passes over the third protrusion 21 indicates that the female ring 11 has reached the rotation stop position or the female ring 11 starts to move from the rotation stop position. Further, the female ring 11 reaches a predetermined position (engagement position with the male ring 3) due to the click feeling caused by the connection tip of the female ring 11 passing over the second protrusion 20. And the fact that the female ring 11 has started to move from a predetermined position (engagement position with the male ring 3), it is possible to prevent inadvertent connection and disconnection and minimize the risk of accidents. It can be kept in.

  The present invention is used in the industry for manufacturing connectors for extracorporeal circulation circuits.

It is a figure which shows the connection operation | movement of the connector for extracorporeal circulation circuits by embodiment of this invention. It is a figure which shows the connection operation | movement of the connector for extracorporeal circulation circuits by embodiment of this invention. It is a figure which shows the connection operation | movement of the connector for extracorporeal circulation circuits by embodiment of this invention. 1 is a perspective view showing an extracorporeal circuit connector according to an embodiment of the present invention. It is sectional drawing along the axial direction of the connector for extracorporeal circulation circuits by embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Male connector assembly, 2 ... Male side communication pipe, 3 ... Male side ring, 5 ... 1st pipe connection part (Male side tube connection part), 6 ... Packing, 8 ... Male side Engagement part (notch part), 10 ... Female side communication pipe, 11 ... Male side ring, 12 ... Second pipe connection part (female side tube connection part), 22 ... Female side engagement part ( Notch receiving part), 23 ... Step part, 27 ... Extracorporeal circuit connector, 32 ... Small diameter part, 33 ... Large diameter part

Claims (3)

In the extracorporeal circuit connector for connecting the first tube and the second tube used in the extracorporeal circuit,
A male connector assembly having a male side ring in which one end portion is a first tube connecting portion, and a male side ring that is attached to the outer periphery of the male side connecting tube and has a male side engaging portion;
A female side communication tube having one end portion serving as a second tubular body connection portion and a female side engagement portion that is attached to the outer periphery of the female side communication tube and engages with the male side engagement portion A female connector assembly having a ring;
A packing for sealing between the male communication pipe and the female communication pipe,
The male ring is rotatable with respect to the male communication pipe, or the female ring is rotatable with respect to the female communication pipe,
The female ring is slidable in the axial direction of the female communication pipe, or the male ring is slidable in the axial direction of the male communication pipe,
With the male connector assembly and the female connector assembly relatively moved closer to the axial direction of the male communication tube, the male ring is sealed with the seal between the male communication tube and the female communication tube. Alternatively, by rotating the female ring, the positions of the male ring engaging portion and the female ring engaging portion in the rotating direction are matched, and the male ring or the female ring is moved in the axial direction of the male communication pipe. Even if the male side communication pipe or the female side communication pipe rotates by engaging the male side ring engagement part and the female side ring engagement part by moving closer to the male side ring, the male side ring and female side A connector for an extracorporeal circuit, wherein the ring is maintained in a fixed state as a unit. The female communication pipe has a small diameter portion on one end side, a large diameter portion on the other end side, and a stepped portion connecting the small diameter portion and the large diameter portion,
The male ring is rotatable with respect to the male communication pipe, the male ring cannot slide in the axial direction of the male communication pipe, and the female ring is not movable with respect to the female communication pipe. In addition to being unable to rotate, the female ring is slidable in the axial direction of the female communication tube,
The packing is fixed to the opposite end to the first tube connecting portion in the outer peripheral portion of the male communication tube,
The male ring engagement part is a notch, the female ring engagement part is a notch receiving part,
The male connector assembly is moved closer to the female connector assembly, and the male ring is rotated while the packing is in contact with the inner surface of the stepped portion of the female communication tube. By aligning the position of the part in the rotation direction and moving the female ring closer to the axial direction of the male communication pipe, the notch receiving part is fitted into the cutout part, and the male communication pipe rotates. Even if it moves, the male ring, female ring, and female communication pipe are maintained in a fixed state.
In a state where the notch receiving portion is fitted in the notch portion, a flow path having no step is formed at the connection position between the flow path of the male communication pipe and the flow path of the female communication pipe. The extracorporeal circuit connector according to claim 1. A plurality of the extracorporeal circuit connectors according to claim 1 or 2 are used, and among the plurality of extracorporeal circuit connectors, the color of the male ring or the female ring in the extracorporeal circuit connector and others The extracorporeal circuit is characterized in that the color of the male ring or female ring in the extracorporeal circuit connector is different.

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