WO2021124727A1

WO2021124727A1 - Medical connector

Info

Publication number: WO2021124727A1
Application number: PCT/JP2020/041765
Authority: WO
Inventors: 俊彦柿木
Original assignee: テルモ株式会社
Priority date: 2019-12-20
Filing date: 2020-11-09
Publication date: 2021-06-24

Abstract

This medical connector comprises a first rotation member and a second rotation member which is coupled to the first rotation member via a rotation transmitting mechanism. The first rotation member has a first connection part which is reversibly connected to a first medical tool by being rotated in a first circumferential direction relative to the first medical tool, and the second rotation member has a second connection member which is reversibly connected to a second medical tool. The rotation transmitting mechanism regulates rotation of the second rotation member in the first circumferential direction relative to the first rotation member while allowing rotation of the second rotation member in a second circumferential direction relative to the first rotation member. The second rotation member has a cover part that covers the first rotation member so as to prevent the first rotation member from being held when the first connection member is connected to the first medical tool.

Description

Medical connector

This disclosure relates to medical connectors.

Conventionally, when performing infusion, blood transfusion, artificial dialysis, etc., an infusion line is formed using a medical tube or the like, and a liquid such as a drug solution is supplied into the body through this infusion line. Medical devices such as medical tubes and syringes used in infusion lines are connected to each other using medical connectors. The medical connector partitions the first flow path and connects to the first medical device, the first connection portion, and the second flow path that communicates with the first flow path, and is connected to the second medical device. It has a second connection part.

The medical connector may have a first rotating member provided with a first connecting portion and a second rotating member rotatably connected to the first rotating member about an axis and having a second connecting portion. Further, in this case, as described in Patent Document 1, for example, the first connection portion is reversibly connected to the first medical device by rotating in the first circumferential direction about the axis of the first medical device. May be configured to be. According to such a configuration, the connection state at the first connection portion can be maintained satisfactorily.

International Publication No. 2019/130891

However, in a medical connector as described in Patent Document 1, the first rotating member has a grip portion that is gripped by a finger for a connection operation and a separation operation with respect to the first medical device. Therefore, if a medical worker, a patient, or the like erroneously operates the grip portion, the first connection portion may be unintentionally separated from the first medical device.

Therefore, an object of the present disclosure is to provide a medical connector that can maintain a good connection state at the first connection portion and is unlikely to be separated at the first connection portion due to an erroneous operation.

The medical connector as one aspect of the present disclosure includes a first rotating member and a second rotating member connected to the first rotating member via a rotation transmission mechanism, and the first rotating member is a first rotating member. It has a first connection portion that is reversibly connected to the first medical device by partitioning one flow path and rotating in the first circumferential direction about an axis with respect to the first medical device, and the second rotation. The member has a second connecting portion that partitions the second flow path communicating with the first flow path and is reversibly connected to the second medical device, and the rotation transmission mechanism is the second rotating member. Restricts the first rotating member from rotating in the first circumferential direction, while the second rotating member has a second circumference that is opposite to the first rotating member in the first circumferential direction. Allowing rotation in the direction, the second rotating member covers the first rotating member so that the first rotating member cannot be gripped in a state where the first connecting portion is connected to the first medical device. It has a covering part.

As one embodiment of the present disclosure, the first medical device has a male connector portion and a lock cylinder located radially outside the male connector portion, and the first connection portion has the male connector portion. It has a female connector portion to be inserted, and the outer peripheral surface of the female connector portion is reversibly connected to the lock cylinder by engaging the concave-convex shapes with each other by rotating in the first circumferential direction with respect to the lock cylinder. Has an engaging part.

As one embodiment of the present disclosure, the first rotating member includes an outer wall forming a part of the rotation transmission mechanism and has an outer portion located radially outside the female connector portion, and the covering portion. Covers the outer portion so that the outer portion cannot be gripped in a state where the first connecting portion is connected to the first medical device.

As one embodiment of the present disclosure, in a state where the first connecting portion is connected to the first medical device, a gap having a size of 6 mm or less in a direction along the axis is provided between the covering portion and the lock cylinder. Is formed.

As one embodiment of the present disclosure, the first medical device has a female connector portion, and the first connection portion has a male connector portion inserted into the female connector portion and a radial outer side of the male connector portion. The inner peripheral surface of the lock cylinder is rotated in the first circumferential direction with respect to the female connector portion, so that the concave-convex shapes are engaged with each other and the female connector portion is reversibly engaged with the female connector portion. It has an engaging part to be connected.

As one embodiment of the present disclosure, the first rotating member includes an outer wall forming a part of the rotation transmission mechanism and the lock cylinder, and has an outer portion located radially outside the male connector portion. Then, the covering portion covers the outer portion so that the outer portion cannot be gripped in a state where the first connecting portion is connected to the first medical device.

As one embodiment of the present disclosure, the second medical device is reversibly connected to the second connection portion by rotating about the axis with respect to the second connection portion.

As one embodiment of the present disclosure, the second medical device is reversibly connected to the second connection portion by rotating in the first circumferential direction with respect to the second connection portion.

As one embodiment of the present disclosure, the second connection portion has a valve body that closes the second flow path.

As one embodiment of the present disclosure, the second medical device has a male connector portion, and the second connection portion has a female connector portion having an insertion port into which the male connector portion is inserted, and the valve body. Is an elastic valve body having a disk-shaped closing portion that closes the insertion port and has a slit, and a fixing portion that is connected to the outer peripheral edge of the closing portion and is fixed to the insertion port. , The male connector portion opens by pushing the closed portion into the second flow path from the insertion port.

As one embodiment of the present disclosure, the second medical device has a male connector portion and a lock cylinder located radially outside the male connector portion, and the second connecting portion has the male connector portion. It has a female connector portion to be inserted, and the outer peripheral surface of the female connector portion becomes the lock cylinder by engaging the concave-convex shapes with each other by rotating the lock cylinder with respect to the female connector portion in the first circumferential direction. It has an engaging part that is reversibly connected.

According to the present disclosure, it is possible to provide a medical connector that can maintain a good connection state at the first connection portion and is unlikely to be separated at the first connection portion due to an erroneous operation.

It is a perspective view which shows the medical connector as 1st Embodiment. It is a vertical sectional view of the medical connector shown in FIG. It is a perspective view which shows the 1st rotating member of the medical connector shown in FIG. It is sectional drawing in the cross section along the circumferential direction which shows the ratchet mechanism of the rotation transmission mechanism of the medical connector shown in FIG. It is a vertical cross-sectional view which shows the state when the 1st connection part of the medical connector shown in FIG. 1 is connected to the 1st medical device. It is a vertical cross-sectional view which shows the state when the 2nd connection part is connected to the 2nd medical device in the state where the 1st connection part of the medical connector shown in FIG. 1 is connected to the 1st medical device. It is an external view which shows the infusion set including the medical connector shown in the figure. It is a vertical sectional view which shows the medical connector as a 2nd Embodiment.

Hereinafter, embodiments of the medical connector according to the present disclosure will be illustrated in detail with reference to FIGS. 1 to 8. The corresponding elements in each figure are designated by the same reference numerals.

The medical connector 1 according to the first embodiment shown in FIGS. 1 to 3 has a first rotating member 2 and a second rotating member 4 connected to the first rotating member 2 via a rotation transmission mechanism 3. doing. The first rotating member 2 partitions the first flow path 5 and rotates in the first circumferential direction C1 about the axis O with respect to the first medical device 6 (see FIG. 5) to cover the first medical device 6. It has a first connecting portion 7 that is reversibly connected to the connecting portion 6a. The second rotating member 4 is a second connecting portion that partitions the second flow path 8 that communicates with the first flow path 5 and is reversibly connected to the connected portion 9a of the second medical instrument 9 (see FIG. 6). Has 10. "Reversibly connected" means that the connection is separable by the operation opposite to the operation for connection. The second connecting portion 10 has a valve body 11 that closes the second flow path 8. That is, the second connection portion 10 is configured as a closed type connection portion. However, the second connection portion 10 is not limited to this, and may be configured as an open type connection portion that does not have a valve body 11 that closes the second flow path 8. The first connection portion 7 is configured as an open type connection portion that does not have a valve body that closes the first flow path 5. However, the first connecting portion 7 is not limited to this, and may be configured as a closed type connecting portion having a valve body that closes the first flow path 5.

The first connecting portion 7 is connected to the connected portion 6a of the first medical instrument 6 by rotating in the first circumferential direction C1 with respect to the first medical instrument 6, and is connected to the connected portion 6a of the first medical instrument 6 in the first circumferential direction C1 with respect to the first medical instrument 6. By rotating in the second circumferential direction C2, which is the opposite direction of the above, the first medical device 6 is separated from the connected portion 6a. That is, the first connecting portion 7 is reversibly connected to the connected portion 6a of the first medical device 6 by rotating in the first circumferential direction C1 with respect to the first medical device 6.

The rotation transmission mechanism 3 regulates the second rotating member 4 from rotating in the first circumferential direction C1 with respect to the first rotating member 2, while the second rotating member 4 is second with respect to the first rotating member 2. It is configured to allow rotation in the circumferential direction C2.

In the present embodiment, the direction along the axis O is referred to as the axial direction A, and the direction from the second connecting portion 10 to the first connecting portion 7 along the axial direction A is referred to as the first axial direction A1 or downward, and the first The direction opposite to the axial direction A1 is referred to as the second axial direction A2 or upward, the direction orbiting the axis O is referred to as the circumferential direction C, the direction perpendicular to the axis O is referred to as the radial direction (not shown), and includes the axis O. The cross section is called the vertical cross section.

Further, in the present embodiment, the direction that is clockwise (clockwise) when viewed in the first axial direction A1 is defined as the first circumferential direction C1, but the present invention is not limited to this. That is, the direction that is counterclockwise (counterclockwise) when viewed in the first axial direction A1 may be the first circumferential direction C1.

As shown in FIG. 6, the connected portion 9a of the second medical device 9 rotates about the axis O with respect to the second connecting portion 10, that is, rotates in the circumferential direction C, so that the connected portion 9a is reversible to the second connecting portion 10. It is configured to be connected to. However, the connected portion 9a of the second medical device 9 is not limited to this, and for example, the second connecting portion 10 moves in the first axial direction A1 with respect to the second connecting portion 10 without rotation in the circumferential direction C. It may be configured to be reversibly connected to.

The connected portion 9a of the second medical device 9 is configured to be reversibly connected to the second connecting portion 10 by rotating in the first circumferential direction C1 with respect to the second connecting portion 10. However, the connected portion 9a of the second medical device 9 is not limited to this, and is reversibly connected to the second connecting portion 10 by rotating in the second circumferential direction C2 with respect to the second connecting portion 10, for example. It may be configured.

The connected portion 9a of the second medical device 9 has a male connector portion 9b and a lock cylinder 9c located radially outside the male connector portion 9b, but is not limited to this. The second connection portion 10 has a female connector portion 12 into which the male connector portion 9b is inserted, but is not limited to this. The outer peripheral surface of the female connector portion 12 is an engaging portion 13 that is reversibly connected to the lock cylinder 9c by engaging the concave-convex shapes with each other by rotating the lock cylinder 9c with respect to the female connector portion 12 in the first circumferential direction C1. However, it is not limited to this. In the engaging portion 13 and the lock cylinder 9c, the locking cylinder 9c rotates in the second circumferential direction C2 with respect to the engaging portion 13, so that the engaging portion 13 is reversible to the lock cylinder 9c due to the engagement between the uneven shapes. It may be configured to be connected to.

The engagement between the concave-convex shapes between the engaging portion 13 and the lock cylinder 9c is screwed, but is not limited to this. The second connection portion 10 is configured to comply with, for example, ISO 80369-7 of 2016.

The female connector portion 12 has an insertion port 14 into which the male connector portion 9b is inserted. The valve body 11 is an elastic valve body having a disc-shaped closing portion 11b that closes the insertion port 14 and has a slit 11a, and a fixing portion 11c that is connected to the outer peripheral edge of the closing portion 11b and is fixed to the insertion port 14. Is. The slit 11a is configured so that the male connector portion 9b opens by pushing the closing portion 11b into the second flow path 8 from the insertion port 14. However, the configuration of the valve body 11 is not limited to this.

As shown in FIG. 2, the second rotating member 4 includes a tubular inner cylinder 15 centered on the axis O, a flange 16 extending radially outward from the upper end of the inner cylinder 15, and a flange 16 downward from the outer peripheral edge of the flange 16. It has a tubular outer cylinder 17 extending upward, a tubular female connector portion 12 centered on an axis O extending upward from the flange 16, and a valve body 11, but the present invention is not limited to this.

The housing 4a composed of the inner cylinder 15, the flange 16, the outer cylinder 17, and the female connector portion 12 is composed of three members, an upper cap 18, a lower cap 19, and a holder 20. However, the housing 4a is not limited to this, and may be composed of, for example, two or less members, or may be composed of four or more members. The upper cap 18, the lower cap 19, and the holder 20 are each formed by, for example, injection molding, but are not limited thereto. The upper cap 18, the lower cap 19 and the holder 20 are joined by, for example, fusion. The housing 4a is made of, for example, a synthetic resin, and the valve body 11 is made of, for example, rubber or an elastomer.

An upper wall 21 extending inward in the radial direction is connected to the upper portion of the inner peripheral surface of the inner cylinder 15, and the upper wall 21 has a through hole 22 penetrating in the vertical direction. A hollow portion 23 is formed between the through hole 22 and the valve body 11. The second flow path 8 is composed of a hollow portion 23 and a through hole 22, but is not limited to this.

As shown in FIG. 5, the connected portion 6a of the first medical device 6 has a male connector portion 6b and a lock cylinder 6c located radially outside the male connector portion 6b, but is limited to this. Absent. The first connection portion 7 has a female connector portion 24 into which the male connector portion 6b is inserted, but the first connection portion 7 is not limited to this. The outer peripheral surface of the female connector portion 24 has an engaging portion 25 that is reversibly connected to the lock cylinder 6c by engaging the concave-convex shapes with each other by rotating in the first circumferential direction C1 with respect to the lock cylinder 6c. However, it is not limited to this.

The engagement between the concave-convex shapes between the engaging portion 25 and the lock cylinder 6c is screwed, but is not limited to this. The first connection unit 7 is configured to comply with, for example, ISO 80369-7 of 2016.

As shown in FIGS. 2 and 3, the first rotating member 2 has a tubular shape centered on the axis O and is located at the inner portion 26 constituting the female connector portion 24 and radially outside the female connector portion 24. It has a housing 2a provided with an outer portion 27 to be formed, but is not limited to this. The outer portion 27 has an annular wall 28 extending radially outward from the inner portion 26 and a tubular outer wall 29 centered on an axis O extending upward from the annular wall 28 and forming a part of the rotation transmission mechanism 3. However, it is not limited to this. The first rotating member 2 is made of, for example, a synthetic resin. The first rotating member 2 is formed by, for example, injection molding.

The inner peripheral surface of the inner portion 26 partitions the first flow path 5. The upper part of the inner portion 26 is inserted into the inner cylinder 15. The upper part of the inner part 26 and the part below the upper wall 21 on the inner peripheral surface of the inner cylinder 15 are in close contact with each other, so that the connection portion between the first flow path 5 and the second flow path 8 is formed. A close portion 30 is formed to prevent liquid leakage. However, the close portion 30 between the inner portion 26 and the inner cylinder 15 may be provided in a portion different from this. An annular elastic member centered on the axis O may be provided between the inner portion 26 and the inner cylinder 15 to ensure closer sealing by the elastic member.

The rotation transmission mechanism 3 has a rotation connecting portion 3a that rotatably connects the housing 2a of the first rotation member 2 and the housing 4a of the second rotation member 4 in the circumferential direction C. Further, the rotation transmission mechanism 3 restricts the second rotating member 4 from rotating in the first circumferential direction C1 with respect to the first rotating member 2, while the second rotating member 4 has a second with respect to the first rotating member 2. It has a ratchet mechanism 3b that allows rotation in the two circumferential directions C2.

The rotary connecting portion 3a is composed of an engaging portion 31 between the outer wall 29 and the inner cylinder 15 inserted into the outer wall 29, but is not limited to this. The engaging portion 31 is composed of an annular groove 32 provided on the outer peripheral surface of the inner cylinder 15 and a plurality of claws 33 provided on the outer wall 29, but is not limited thereto. The number of claws 33 is not limited to a plurality.

As shown in FIGS. 1 to 4, the ratchet mechanism 3b is composed of a plurality of convex portions 34 arranged at intervals in the circumferential direction C and a deformable portion 35 that can be elastically deformed. In FIG. 1, only one convex portion 34 is designated by a reference numeral. When the second rotating member 4 rotates in the first circumferential direction C1 with respect to the first rotating member 2, the deformed portion 35 hits one of the convex portions 34 to prevent the rotation, while the second rotating member 4 causes the second rotating member 4. When rotating in the second circumferential direction C2 with respect to the first rotating member 2, the convex portion 34 is elastically deformed (see the two-dot chain line in FIG. 4) so as to get over the convex portion 34 in the second circumferential direction C2.

The deformed portion 35 is provided in the housing 2a of the first rotating member 2, and the convex portion 34 is provided in the housing 4a of the second rotating member 4, but the present invention is not limited to this. That is, the deformed portion 35 may be provided in the housing 2a of the first rotating member 2, and the convex portion 34 may be provided in the housing 4a of the second rotating member 4.

The deformed portion 35 is provided on the upper surface of the outer wall 29, and the convex portion 34 is provided on the lower surface of the flange 16, but the present invention is not limited to this. For example, the deformed portion 35 may be provided on the lower surface of the flange 16, and the convex portion 34 may be provided on the upper surface of the outer wall 29. The deformed portion 35 is composed of a cantilever elastic piece, but is not limited to this. The deformed portion 35 has a fixed end in the first circumferential direction C1 and a free end in the second circumferential direction C2, but is not limited to this.

As shown in FIGS. 1, 2, and 5, the second rotating member 4 rotates first so that the first rotating member 2 cannot be gripped when the first connecting portion 7 is connected to the first medical device 6. It has a covering portion 36 that covers the member 2. More specifically, the covering portion 36 is configured to cover the outer portion 27 so that the outer portion 27 cannot be gripped when the first connecting portion 7 is connected to the first medical device 6. The distance D (see FIG. 2) in the first axial direction A1 from the lower end of the outer portion 27 to the lower end of the covering portion 36 is, for example, -3 mm or more. The covering portion 36 is composed of a part of the housing 4a of the second rotating member 4. More specifically, the covering portion 36 is composed of an outer cylinder 17, but is not limited to this.

In a state where the first connecting portion 7 is connected to the first medical instrument 6, for example, a gap G having a size of 6 mm or less in the axial direction A is provided between the covering portion 36 and the lock cylinder 6c of the first medical instrument 6. (See FIG. 5) is formed.

The medical connector 1 can be used as follows in, for example, an infusion line formed when performing infusion, blood transfusion, artificial dialysis, or the like. First, as shown in FIG. 5, the first connection portion 7 of the medical connector 1 is connected to the connected portion 6a of the first medical device 6. In this connection, the male connector portion 6b of the first medical instrument 6 is inserted into the female connector portion 24 of the first connection portion 7 of the medical connector 1, and in this state, the first rotating member 2 is locked to the first medical instrument 6. This is done by rotating the cylinder 6c in the first circumferential direction C1. In this connection, for example, one hand grips the lock cylinder 6c of the first medical device 6 and the other hand grips the cover portion 36 of the first rotating member 2, and the cover portion 36 is attached to the lock cylinder 6c. It is performed by the operation of rotating in the first circumferential direction C1. At this time, since the rotation transmission mechanism 3 rotates the second rotating member 4 together with the first rotating member 2, the engaging portion 25 of the female connector portion 24 can be connected to the lock cylinder 6c.

By reversibly connecting the first connection portion 7 to the connected portion 6a of the first medical device 6 by the rotation operation in this way, the connection state at the first connection portion 7 can be maintained satisfactorily. Further, since the second connection portion 10 of the medical connector 1 is closed by the valve body 11, the first connection portion 7 of the medical connector 1 is connected to the connected portion 6a of the first medical instrument 6. It is possible to maintain a state in which the connected portion 6a of the medical device 6 is closed by the medical connector 1.

Further, in this state, even if the second rotating member 4 is rotated in the second circumferential direction C2 with respect to the first medical instrument 6 due to, for example, an erroneous operation, the rotation transmission mechanism 3 makes the second rotating member 4 the first rotating member 2. Let it spin freely. Therefore, it is possible to prevent the connected portion 6a of the first medical device 6 and the first connecting portion 7 of the medical connector 1 from being separated from each other.

Further, in this state, the covering portion 36 of the second rotating member 4 covers the first rotating member 2 so that the first rotating member 2 cannot be gripped. Therefore, it is possible to prevent the connected portion 6a of the first medical device 6 and the first connecting portion 7 of the medical connector 1 from being separated due to an erroneous operation on the first rotating member 2.

Further, in this state, the covering portion 36 covers the outer portion 27 of the first rotating member 2 so that the outer portion 27 of the first rotating member 2 cannot be gripped. Therefore, it is possible to prevent the connected portion 6a of the first medical device 6 and the first connecting portion 7 of the medical connector 1 from being separated due to an erroneous operation on the outer portion 27. Further, when the distance D in the first axial direction A1 from the lower end of the outer portion 27 to the lower end of the covering portion 36 is -3 mm or more, such an effect can be obtained more reliably.

Further, in a state where the first connecting portion 7 is connected to the first medical instrument 6, a gap G having a size of 6 mm or less is formed in the axial direction A between the covering portion 36 and the lock cylinder 6c of the first medical instrument 6. In this case, the female connector portion 24 cannot be gripped through the gap G. Therefore, it is possible to prevent the first connection portion 7 of the medical connector 1 from being separated from the connected portion 6a of the first medical device 6 due to an erroneous operation of the first connection portion 7 to the female connector portion 24.

As shown in FIG. 6, from the state where the first connecting portion 7 is connected to the first medical instrument 6, the connected portion 9a of the second medical instrument 9 is connected to the second connecting portion 10 of the medical connector 1 as needed. The first medical device 6 and the second medical device 9 can be connected to each other via the medical connector 1.

In this connection, the male connector portion 9b of the second medical instrument 9 is inserted into the female connector portion 12 of the second connection portion 10 of the medical connector 1, and in this state, the lock cylinder 9c of the second medical instrument 9 is rotated for the first time. This is done by rotating the member 2 in the first circumferential direction C1. In this connection, for example, one hand grips the covering portion 36 of the second rotating member 4 (not shown), and the other hand grips the lock cylinder 9c of the second medical device 9 to cover the lock cylinder 9c. It is performed by the operation of rotating the 36 in the first circumferential direction C1.

At this time, instead of gripping the covering portion 36 of the first rotating member 2, even when the lock cylinder 6c of the first medical instrument 6 is gripped as shown in FIG. 6, the second connecting portion 10 rotates together with the lock cylinder 9c. Since this is restricted by the rotation transmission mechanism 3, the lock cylinder 9c can be connected to the second connection portion 10. By reversibly connecting the connected portion 9a of the second medical device 9 to the second connecting portion 10 by the rotation operation, the connected state at the second connecting portion 10 can be maintained satisfactorily.

When the lock cylinder 9c of the second medical instrument 9 is separated from the second connection portion 10 of the medical connector 1, for example, the lock cylinder 9c of the second medical instrument 9 and the covering portion 36 of the second rotating member 4 are gripped, respectively. And rotate it. At this time, even if the lock cylinder 6c of the first medical device 6 is mistakenly gripped instead of gripping the cover portion 36 of the second rotating member 4, the first connecting portion 7 has the lock cylinder 9c and the third of the second medical device 9. Rotation transmission mechanism 3 regulates co-rotation in the two circumferential directions C2. Therefore, it is possible to prevent the lock cylinder 6c of the first medical device 6 and the first connection portion 7 of the medical connector 1 from being separated from each other.

The medical connector 1 may be used without being separated from the first medical device 6 for the period of use of the first medical device 6 after being once connected to the first medical device 6, or may be used for separation. A tool may be provided so that it can be separated from the first medical device 6 by using the jig if necessary.

FIG. 7 shows an example of an infusion set 37 for forming an infusion line. The infusion set 37 shown in FIG. 7 is used to form an infusion line connecting an infusion holder such as an infusion bag (not shown) to an indwelling needle (not shown). Specifically, the infusion set 37 includes a first medical device 6 configured as a first medical tube, a medical connector 1, a second medical device 9 configured as a second medical tube, and an intravenous drip tube. It has 38, an adjusting clamp 39, and a closing clamp 40. The drip tube 38 makes the flow rate of the infusion solution supplied from the infusion solution holder visible. The adjusting clamp 39 can change the flow rate of the infusion agent in the infusion line to a plurality of states. The occluding clamp 40 can occlude the infusion line.

The distal end of the first medical device 6 is directly or indirectly connected to the proximal end of the indwelling needle. At the proximal end of the first medical device 6, a connected portion 6a connected to the first connecting portion 7 of the medical connector 1 is provided. At the distal end of the second medical device 9, a connected portion 9a connected to the second connecting portion 10 of the medical connector 1 is provided. The proximal end of the second medical device 9 is connected to the distal end of the infusion tube 38. The proximal end of the second medical device 9 is directly connected to the distal end of the infusion tube 38, but may be indirectly connected. The proximal end of the drip tube 38 is directly or indirectly connected to the infusion holder.

The infusion set 37 is not limited to the configuration having the first medical device 6, the medical connector 1, the second medical device 9, the drip tube 38, the adjusting clamp 39 and the closing clamp 40, for example, the first medical device 6, medical treatment. It may be configured to have a clamp 1 and a second medical device 9.

In the first embodiment, the connected portion 6a of the first medical device 6 has a male connector portion 6b and a lock cylinder 6c, and the first connecting portion 7 of the medical connector 1 has a female connector portion 24. .. However, as in the case of the second embodiment shown in FIG. 8, the connected portion 6a of the first medical device 6 has the female connector portion 6d, and the first connecting portion 7 of the medical connector 1 has the male connector portion 41. And a lock cylinder 42 may be provided.

In the second embodiment shown in FIG. 8, the first connection portion 7 has the male connector portion 41 inserted into the female connector portion 6d of the connected portion 6a of the first medical device 6 and the male connector portion 41 in the radial direction with respect to the male connector portion 41. It has a lock cylinder 42 located on the outside. The inner peripheral surface of the lock cylinder 42 has an engaging portion 43 that is reversibly connected to the female connector portion by engaging the concave-convex shapes with each other by rotating in the first circumferential direction C1 with respect to the female connector portion 6d. There is.

The engagement between the concave-convex shapes between the female connector portion 6d and the engaging portion 43 of the lock cylinder 42 is screwed, but is not limited to this. The first connection unit 7 is configured to comply with, for example, ISO 80369-7 of 2016.

The first rotating member 2 includes an outer wall 29 and a lock cylinder 42 that form a part of the rotation transmission mechanism 3, and also has an outer portion 27 that is located radially outside the male connector portion 41. The covering portion 36 is configured to cover the outer portion 27 so that the outer portion 27 cannot be gripped when the first connecting portion 7 is connected to the first medical device 6.

As described above, the covering portion 36 is configured to cover the first rotating member 2 so that the first rotating member 2 cannot be gripped when the first connecting portion 7 is connected to the first medical device 6. The distance D in the first axial direction A1 from the lower end of the outer portion 27 to the lower end of the covering portion 36 is, for example, -3 mm or more. The covering portion 36 is composed of a part of the housing 4a of the second rotating member 4. More specifically, the covering portion 36 is composed of an outer cylinder 17, but is not limited to this.

The medical connector 1 according to the second embodiment can be used, for example, in the infusion set 37 in the same manner as in the case of the first embodiment. According to the medical connector 1 according to the second embodiment, the connection at the first connection portion 7 is made by reversibly connecting the first connection portion 7 to the connected portion 6a of the first medical instrument 6 by a rotation operation. The condition can be maintained in good condition.

Further, in a state where the first connecting portion 7 is connected to the first medical device 6, the covering portion 36 of the second rotating member 4 covers the first rotating member 2 so that the first rotating member 2 cannot be gripped. Therefore, it is possible to prevent the connected portion 6a of the first medical device 6 and the first connecting portion 7 of the medical connector 1 from being separated due to an erroneous operation on the first rotating member 2.

The medical connector according to the present disclosure is not limited to the configuration of the above embodiment, and can be appropriately changed within the scope of the claims.

1 Medical connector 2 1st rotating member 2a Housing 3 Rotating transmission mechanism 3a Rotating connecting part 3b Ratchet mechanism 4 2nd rotating member 4a Housing 5 1st flow path 6 1st medical equipment 6a Connected part 6b Male connector part 6c Lock cylinder 6d Female connector part 7 1st connection part 8 2nd flow path 9 2nd medical equipment 9a Connected part 9b Male connector part 9c Lock cylinder 10 2nd connection part 11 Valve body 11a Slit

11b Closure part

11c Fixation part 12 2nd connection Female connector part 13 Engagement part of the second connection part 14 Insertion part of the second connection part 15 Inner cylinder 16 Flange 17 Outer cylinder 18 Upper cap 19 Lower cap 20 Holder 21 Upper wall 22 Through hole 23 Hollow part 24 First Female connector part of the connection part 25 Engagement part of the first connection part 26 Inner part 27 Outer part 28 Circular wall 29 Outer wall 30 Close contact part 31 Engagement part 32 Ring groove 33 Claw 34 Convex part 35 Deformation part 36 Cover part 37 Infusion set 38 Drip tube 39 Adjustment clamp 40 Closure clamp 41 Male connector part of the first connection part 42 Lock cylinder part of the first connection part 43 Engagement part of the first connection part A Axial direction A1 1st axial direction A2 2nd axial direction C Circumferential direction C1 1st circumferential direction C2 2nd circumferential direction D Distance G Gap O Axis line

Claims

It has a first rotating member and a second rotating member connected to the first rotating member via a rotation transmission mechanism.
The first rotating member is a first connecting portion that is reversibly connected to the first medical device by partitioning the first flow path and rotating in the first circumferential direction about an axis with respect to the first medical device. Have,
The second rotating member has a second connecting portion that partitions the second flow path communicating with the first flow path and is reversibly connected to the second medical device.
The rotation transmission mechanism restricts the second rotating member from rotating in the first circumferential direction with respect to the first rotating member, while the second rotating member has the first rotation with respect to the first rotating member. Allows rotation in the second lap direction, which is the opposite direction of the first lap direction,
The second rotating member is a medical connector having a covering portion that covers the first rotating member so that the first rotating member cannot be gripped in a state where the first connecting portion is connected to the first medical device.
The first medical device has a male connector portion and a lock cylinder located radially outside the male connector portion.
The first connection portion has a female connector portion into which the male connector portion is inserted.
1. The outer peripheral surface of the female connector portion has an engaging portion that is reversibly connected to the lock cylinder by engaging the concave-convex shapes with each other by rotating in the first circumferential direction with respect to the lock cylinder. Medical connector described in.
The first rotating member includes an outer wall forming a part of the rotation transmission mechanism and has an outer portion located radially outside the female connector portion.
The medical connector according to claim 2, wherein the covering portion covers the outer portion so that the outer portion cannot be gripped in a state where the first connecting portion is connected to the first medical device.
3. The third aspect of the present invention, in which the first connecting portion is connected to the first medical device, and a gap having a size of 6 mm or less is formed between the covering portion and the lock cylinder in a direction along the axis. Medical connector described in.
The first medical device has a female connector portion and has a female connector portion.
The first connection portion has a male connector portion inserted into the female connector portion and a lock cylinder located radially outside the male connector portion.
The inner peripheral surface of the lock cylinder has an engaging portion that is reversibly connected to the female connector portion by engaging the concave-convex shapes with each other by rotating in the first circumferential direction with respect to the female connector portion. Item 1. The medical connector according to item 1.
The first rotating member includes an outer wall forming a part of the rotation transmission mechanism and the lock cylinder, and has an outer portion located radially outside the male connector portion.
The medical connector according to claim 5, wherein the covering portion covers the outer portion so that the outer portion cannot be gripped in a state where the first connecting portion is connected to the first medical device.
The medical device according to any one of claims 1 to 6, wherein the second medical device is reversibly connected to the second connection portion by rotating about the axis with respect to the second connection portion. Connector for.
The second medical device according to any one of claims 1 to 7, wherein the second medical device is reversibly connected to the second connection portion by rotating in the first circumferential direction with respect to the second connection portion. Medical connector.
The medical connector according to any one of claims 1 to 8, wherein the second connection portion has a valve body that closes the second flow path.
The second medical device has a male connector portion and has a male connector portion.
The second connection portion has a female connector portion having an insertion port into which the male connector portion is inserted.
The valve body is an elastic valve body having a disk-shaped closing portion that closes the insertion port and has a slit, and a fixing portion that is connected to the outer peripheral edge of the closing portion and is fixed to the insertion port.
The medical connector according to claim 9, wherein the slit is opened by the male connector portion pushing the closed portion into the second flow path from the insertion port.
The second medical device has a male connector portion and a lock cylinder located radially outside the male connector portion.
The second connection portion has a female connector portion into which the male connector portion is inserted.
The outer peripheral surface of the female connector portion is an engaging portion that is reversibly connected to the lock cylinder by engaging the concave-convex shapes with each other by rotating the lock cylinder with respect to the female connector portion in the first circumferential direction. The medical connector according to any one of claims 1 to 10.