WO2017150125A1

WO2017150125A1 - Medical stopcock

Info

Publication number: WO2017150125A1
Application number: PCT/JP2017/004687
Authority: WO
Inventors: 裕之中神; 慎吾阪本; 一樹松本
Original assignee: ニプロ株式会社
Priority date: 2016-03-02
Filing date: 2017-02-09
Publication date: 2017-09-08
Also published as: JPWO2017150125A1; JP6864838B2; JP2021104367A

Abstract

A medical stopcock is provided with: a cylindrical body 101; a first conduit 111, a second conduit 112, and a third conduit 113 connected to sides of the body 101; and a columnar stopper 102 capable of rotating relative to the body 101, an external peripheral surface of the stopper 102 being supported by an internal peripheral surface of the body 101. The third conduit 113 has a partition wall 133 for dividing the inside of the third conduit 113. The stopper 102 has a groove part 121 provided to the external peripheral surface thereof. The first conduit 111 and the second conduit 112 are connected to a third passage 127 formed by an external peripheral surface of the partition wall 133 and an inside wall surface of the inside of the third conduit 113, and a fourth passage 128 formed by the groove part 121 and an inside wall surface of the body 101 when the stopper 102 is in a first position.

Description

Medical stopcock

The present disclosure relates to a medical stopcock, and more particularly to a medical stopcock that can be used for injection of a chemical solution.

A medical stopcock such as a three-way stopcock may be connected to a medical circuit such as an infusion circuit or a blood circuit. By connecting the three-way stopcock, for example, in the case of infusion or the like, another chemical solution can be easily introduced from the side channel into the chemical solution flowing through the main channel.

A general three-way stopcock has a first pipe line and a second pipe line arranged linearly, and a third pipe line arranged in a direction crossing the first pipe line and the second pipe line. The three pipe lines are connected to a cylindrical main body, and a columnar plug is rotatably inserted inside the main body. The plug body is provided with a T-shaped flow hole that penetrates the inside of the plug body. By rotating the plug body and adjusting the position of the flow hole, the three pipe lines can be placed in a flow state or blocked. (For example, refer to Patent Document 1).

However, in such a three-way stopcock, a dead space is generated by a T-shaped flow hole penetrating the stopper, so that, for example, a part of the chemical injected from the third pipe line stays in the dead space.

For the purpose of preventing the retention of the chemical solution, a three-way stopcock having a configuration in which a groove is provided on the outer peripheral surface of the plug and the third pipeline is flushed with the chemical solution from the first pipeline (for example, (See Patent Document 2).

However, even when a groove is provided on the outer peripheral surface of the plug, the chemical solution flows only to the main body side portion of the third conduit, and it is difficult to flush the entire third conduit. For this reason, the effect of eliminating the retention of the chemical solution is not sufficient. The same applies to other medical stopcocks as well as three-way stopcocks.

Therefore, for the purpose of preventing the retention of the chemical solution, a partition wall is provided in the third pipeline so that the drug solution or blood flowing from the first pipeline crosses the partition wall and flows into the second pipeline. A three-way cock with a simple structure has been studied (for example, see Patent Document 3).

JP 2005-046349 A JP 2008-511371 A JP 2010-142438 A

However, the conventional three-way stopcock cannot flow from the first pipe to the second pipe unless the chemical solution flowing from the first pipe to the second pipe passes over the partition wall. For this reason, the flow of the chemical solution is once blocked by the partition wall, the flow rate to the second conduit is reduced, and the chemical solution is sufficiently supplied into the patient's body through a catheter or the like connected to the end of the second conduit. There is a problem that it cannot be administered.

The problem of the present disclosure is to make it possible to realize a medical stopcock in which a chemical solution is unlikely to stay in the pipeline and the flow rate of the chemical solution or the like flowing to the second pipeline is difficult to decrease.

One aspect of the medical stopcock includes a cylindrical main body, a first pipe line, a second pipe line, and a third pipe line that are connected to a side surface of the main body at intervals in the circumferential direction, and an inner circumference of the main body. The outer peripheral surface is supported by the surface, and includes a columnar plug body that is rotatable relative to the main body, the third pipeline has a partition wall that partitions the inside of the third pipeline, The first pipe and the second pipe are formed by the groove and the inner wall surface of the main body when the plug body is in the first position, and the first pipe and the second pipe are provided on the outer peripheral surface. A first channel that connects the channel and the third pipeline, a second channel that connects the second channel and the third pipeline, and an outer peripheral surface of the partition wall. And the inner wall surface of the third pipe line, the third flow path connecting the first flow path and the second flow path, the groove section and the end face on the main body side of the partition wall, The second flow path and It is connected by a fourth flow path to be connected.

By adopting such a configuration, the first pipe and the second pipe are connected not only by the third flow path but also by the fourth flow path at the first position of the plug body. A decrease in flow rate from the road to the second pipe line can be prevented. In addition, the third pipe line can be sufficiently flushed with the liquid flowing through the third flow path.

In one aspect of the medical stopcock, when the plug body is in the first position, the extension line of the portion that becomes the first flow path in the groove reaches the side surface of the partition on the first conduit side, and the second line in the groove You may make it the extension line of the part used as a flow path reach the side surface by the side of the 2nd pipe line of a partition. Further, when the plug body is in the first position, the portion that becomes the first flow path in the groove portion may extend in a direction intersecting with the partition wall. By doing in this way, it can make it difficult to retain a chemical | medical solution between a 1st flow path and a 2nd flow path.

In one aspect of the medical stopcock, the third flow path has a first portion on the first conduit side and a second portion on the second conduit side, and the groove portion when the stopper is in the first position. The end portion on the third pipe line side of the portion that becomes the first flow path may be located within a range in which the first portion of the third flow path is extended into the main body. With such a configuration, the liquid can sufficiently flow from the first flow path to the third flow path.

In one aspect of the medical stopcock, the third conduit may have a reduced diameter portion that gradually decreases in inner diameter toward the main body side. By providing the reduced diameter portion, no step is generated in the third pipeline, and the retention of the chemical liquid can be made more difficult to occur.

In one aspect of the medical stopcock, the width of the groove may be equal to or greater than the width of the end on the main body side in the third conduit. By adopting such a configuration, the third pipe line can be sufficiently flushed. In this case, the width of the groove can be 1.5 mm or more and 4.0 mm or less.

In one aspect of the medical stopcock, the third conduit can be inserted with a male connector from the end opposite to the main body, and the tip of the inserted male connector may be in contact with the end face of the partition wall. . Thereby, a partition becomes a stopper which restrict | limits the insertion depth of a male connector, and while connecting a male connector becomes easy, it can make it difficult to produce dropout of a valve body.

In one aspect of the medical stopcock, the first conduit may be reduced in diameter toward the main body. By setting it as such a structure, the retention of the liquid in a 1st pipe line can be decreased.

In one aspect of the medical stopcock, at the first position, the outer end of the first flow path may be provided at a position lower than the lower surface of the end of the first conduit. By adopting such a configuration, it is possible to make it difficult for liquid to stay in the first pipe line even when misalignment occurs.

According to the medical stopcock of the present disclosure, it is possible to make it difficult for the chemical liquid to stay in the pipeline.

FIG. 1 is a perspective view showing a medical stopcock according to an embodiment. FIG. 2 is a sectional view taken along line II-II in FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a cross-sectional view showing a case where the plug is in the first position. FIG. 5 is a cross-sectional view showing a case where the plug is in the second position. FIG. 6 is an enlarged cross-sectional view showing a portion of the first flow path. FIG. 7 is a cross-sectional view showing a modification of the plug. FIG. 8 is a sectional view showing a modification of the medical stopcock.

As shown in FIGS. 1 to 3, the medical stopcock of the present embodiment is a three-way stopcock, and a cylindrical main body 101 and a first conduit 111 connected to the side surface of the main body 101 at intervals in the circumferential direction. The second pipe 112 and the third pipe 113 and the cylindrical plug body 102 whose outer peripheral surface is supported by the inner peripheral surface of the main body 101 and rotatable relative to the main body 101 are provided. .

In the three-way cock of the present embodiment, the first pipe line 111 and the second pipe line 112 are linearly provided with the main body 101 interposed therebetween, and the third pipe line 113 includes the first pipe line 111 and the second pipe line 112. It is provided in a direction orthogonal to the pipe line 112. FIG. 1 shows an example in which the first pipe line 111 is a female luer connector, the second pipe line 112 is a male luer connector with a coupler, and the third pipe line 113 is a needleless connector having a valve body 134. ing. The three-way cock of the present embodiment can be used by being arranged in an arbitrary direction. However, in the following description, it is assumed that the third pipe 113 is arranged upward. Each pipe line will be described with the side connected to the main body 101 as the base end and the opposite side as the end.

A partition wall 133 that divides the third pipeline 113 into two parts along the axial direction of the cylindrical main body 101 is provided at the proximal end of the third pipeline 113. The plug body 102 has a groove 121 provided on the outer peripheral surface. The plug 102 is integrated with the handle 105 and can be rotated together with the handle 105.

As shown in FIG. 4, when the plug body 102 is rotated relative to the main body 101 to the first position, the first pipeline 111 and the third pipeline 113 are formed by the groove 121 and the inner wall of the main body 101. Are formed, and a second flow path 124 is formed to connect the second pipe 112 and the third pipe 113. In addition, a third flow path 127 that connects the first flow path 123 and the second flow path 124 is formed by the outer peripheral surface of the partition wall 133 and the inner wall surface of the third pipeline 113, and the groove portion 121 and the main body 101 of the partition wall 133 are formed. A fourth flow path 128 that connects the first flow path 123 and the second flow path 124 is formed by the end on the side.

For this reason, the first flow path 123 and the second flow path 124 are connected by the third flow path 127 that passes through the inside of the third pipe 113 and also by the fourth flow path 127 that passes through the inside of the main body 101. Connected. Further, the third flow path 127 is divided by a partition wall 133 into a first portion 131 on the first conduit 111 side and a second portion 132 on the second conduit 112 side. The chemical solution or the like flowing through the third flow path 127 passes through the first portion 131 and the second portion 132.

As shown in FIG. 5, the first pipe 111 and the second pipe 112 include the groove 121 and the main body 101 by setting the plug 102 to the second position rotated about 180 degrees from the first position. Are connected by a fifth flow path 129 formed by the inner wall surface, but are not connected to the third conduit 113 and the third flow path 127 is closed. Note that the first pipe 111 and the third pipe 113 can be connected by setting the plug 102 to the third position rotated about 90 degrees clockwise from the first position. The second pipe 112 and the third pipe 113 can be connected by setting the fourth position rotated about 90 degrees around.

When the plug 102 is in the first position and a chemical solution or the like is flowed from the first pipeline 111 to the second pipeline 112 side, the fourth channel 128 is blocked and the third channel 113 is provided with the third channel 113. If only the three flow paths 127 are opened, the resistance of the flow paths increases, and the flow rate to the second pipe 112 decreases. However, in the three-way cock of the present embodiment, the first pipe line 111 and the second pipe line 112 are connected not only by the third flow path 127 but also by the fourth flow path 128. Thus, it is possible to secure a flow rate from the first pipe 112 to the second pipeline 112 and to prevent a decrease in the flow rate. The chemical liquid that has flowed into the third flow path 127 from the first flow path 123 flows to the end side on the first portion 131 side, passes over the partition wall 133 on the end side of the third conduit 113, passes through the second portion 132, and passes through the second portion 132. It flows to the flow path 124. For this reason, compared with the case where there is no partition 133, the whole 3rd pipe line 113 can be flushed. Therefore, when another chemical solution is injected from the third pipeline 113, the chemical solution injected from the third pipeline 113 can be hardly retained in the third pipeline 113.

As shown in FIG. 3, the width along the axial direction at the base end portion of the third conduit 113 coincides with the width of the groove 121 that is the first flow path 123 and the second flow path 124. For this reason, the 1st chemical | medical solution which flowed through the 1st flow path 123 from the 1st pipe line 111 side smoothly into the 1st part 131 of the 3rd flow path 127 not only in the 4th flow path 128 side. Led. Further, it flows from the second portion 132 to the second flow path 124. For this reason, it is possible to make it difficult for the chemical liquid to stay in the third pipe 113. The three-way stopcock is used for infusion, anesthesia, enteral nutrition, and the like. The width of the groove 121 is preferably 1.5 mm to 4.0 mm in order to ensure an appropriate flow rate for each application. The width of the end is preferably 1.5 mm to 4.0 mm.

In addition, the above dimensions are not particularly limited, and can be appropriately changed depending on the application.

The third conduit 113 can be provided with a reduced diameter portion 135 that gradually decreases in inner diameter from the distal side toward the proximal side. By providing the reduced diameter portion 135, a proximal end side narrowed in accordance with the width of the groove portion 121 which is the first flow path 123 and the second flow path 124, and a distal end side having an inner diameter into which an injection cylinder or the like can be inserted It is possible to connect without a step, to ensure a sufficient amount of liquid flowing through the third flow path 127, and to make it difficult for the chemical liquid to stay.

When the male luer connector is inserted into the third conduit 113, the partition wall 133 can be a stopper that limits the insertion depth of the male luer connector. In this case, the male luer connector may be designed so that the distal end of the male luer connector contacts the end face of the partition wall 133 when the male luer connector is inserted to an appropriate position. For example, in the case of a standard male luer connector with a coupler, it is preferable to be able to insert about 4.0 mm to 8.0 mm.

Moreover, it is preferable that the terminal side of the partition wall 133 has a curved surface shape such as a hemisphere. By constituting in this way, it becomes easy to prevent staying in the 3rd pipe line 113 compared with the case where the end side is square shape.

In the present embodiment, in the state where the plug body 102 is in the first position, as shown in FIG. 4, it is preferable that the top of the fourth flow path 128 of the groove 121 is flat. By adopting such a configuration, as shown in FIG. 5, when the plug body 102 is set to the second position rotated 180 degrees from the first position, the middle portion of the fifth flow path 129 is greatly raised. Compared with the case where the convex part has arisen, a bottleneck does not arise easily in the 5th flow path 129, and sufficient flow volume from the 1st pipe line 111 to the 2nd pipe line 112 can be secured. Note that the top portion may not be completely flat but may have a slight bulge. For example, it can be a curved surface substantially parallel to the inner periphery of the main body 101. At least the connecting portion between the slope and the top that is the first flow path 123 and the connecting portion between the slope and the top that are the second flow path 124 should be curved surfaces extending in the direction of the third flow path 127. preferable. With this configuration, the flow to the third flow path is promoted, and a sufficient flow rate from the first pipe line 111 to the second pipe line 112 can be secured.

As shown in FIG. 4, the upper end of the first flow path 123 is preferably provided above the upper end of the base end of the first conduit 111 at the first position. By comprising in this way, the flow to the 1st part 131 is promoted, As a result, it can make it difficult to produce a stay.

The three-way stopcock is used for infusion, anesthesia, enteral nutrition, and the like, and the inner diameter Φ of the main body 101 can be 4.5 mm to 10.5 mm in order to ensure an appropriate flow rate for each application. When the stopper 102 is set to the first position, the bottom surface of the groove 121 and the end surface of the partition wall 133 on the main body 101 side are secured in order to ensure a sufficient amount of the chemical solution passing through the third conduit 113. Is preferably about 0.8 mm to 2.8 mm. By setting d1 to such a value, the flow rate between the first pipe line 111 and the second pipe line 112 can be sufficiently secured when the plug body 102 is set to the second position. Further, the maximum height difference h of the groove 121 can be about 2.0 mm to 5.0 mm.

In order to ensure the flow rate of the first flow path 123 and the second flow path 124 when the plug body 102 is set to the first position, the bottom surface and the main body of the groove 121 in the first flow path 123 and the second flow path 124 The minimum distances d2 and d3 from the inner wall surface of 101 are preferably about 1.0 mm to 2.5 mm. By setting d2 and d3 to such values, the flow rate between the first pipe line 111 and the second pipe line 112 can be sufficiently secured when the plug body 120 is set to the second position.

As shown in FIG. 4, in the state where the plug body 102 is in the first position, the extension line of the portion constituting the first flow path 123 in the groove 121 is the outermost side surface of the partition wall 133 on the first pipeline 111 side. The extension line of the portion that reaches the lower end and forms the second flow path 124 can reach the lowermost end of the side surface of the partition wall 133 on the second conduit 112 side. When the fourth flow path 128 is enlarged so that a sufficient flow rate can be ensured when the plug body 102 is set to the second position, the second pipe 111 is connected to the second flow path when the plug body 102 is set to the first position. Most of the chemical liquid flowing to the pipe line 112 passes through the fourth flow path 128 below the partition wall 133, and the third pipe line 113 may not be flushed. However, the three-way cock of the present embodiment is designed such that the extended line of the slope that is the first flow path 123 and the extended line of the slope that is the second flow path 124 in the groove portion 121 reach the lowest end of the side surface of the partition wall 133. Has been. For this reason, the flow of the chemical liquid from the first pipe 111 toward the third pipe 113 through the first flow path 123 hits the side surface of the partition wall 133, and enters the first portion 131 of the third flow path 127 along the partition wall 133. It becomes easy to invade. In addition, the flow of the chemical solution from the second portion 132 hits the second flow path 124 and easily flows toward the second conduit 112. For this reason, it is possible to ensure a sufficient amount of the chemical solution that passes through the third pipeline 113.

As shown in FIG. 6, in the state where the plug body 102 is in the first position, the end portion (upper end portion) 123a on the third conduit side 113 side of the portion constituting the first flow path 123 in the groove portion 121 is The first portion 131 of the third flow path 127 can be positioned in a range extending into the main body 101. Since the upper end portion 123a of the first flow path 123 is located within the range in which the first portion 131 is extended, a sufficient flow rate can be ensured from the first flow path 123 to the third flow path 127. Similarly, in the state where the plug body 102 is in the first position, the end portion (upper end portion) 124a on the third conduit side 113 side of the portion constituting the second flow path 124 in the groove 121 is the third flow path 127. The second portion 132 can be positioned in a range extending into the main body 101.

As shown in FIG. 7, when the plug body 102 is in the first position, the portions that become the first flow path 123 and the second flow path 124 in the groove 121 are curved in the direction in which the partition wall 133 is present. May be. Also in this case, in the state where the plug body 102 is in the first position, the upper end portion 123a of the portion constituting the first flow path 123 in the groove portion 121 causes the first portion 131 of the third flow path 127 to be the main body 101. It can be located in a range extended inward. With such a configuration, when the plug body 102 is set to the first position, it becomes easy to sufficiently secure the flow rate of the first flow path 123 and flows from the first flow path 123 into the third flow path 127. It becomes easy to ensure the flow rate and the flow rate that flows from the first flow path 123 to the fourth flow path 128. Further, when the plug body 102 is set to the second position, it is easy to secure a flow rate from the first pipeline 111 to the second pipeline 112.

Also, as shown in FIGS. 6 and 7, it is preferable that the number of portions where the sign of curvature near the top of the slope of the first flow path 121 changes from positive to negative or from negative to positive is one. By making the portion where the curvature changes one place, a step is not generated in the first flow path 121, and it is difficult to cause a stay due to the step.

In the three-way cock of the present embodiment, the extension line of the first flow path 123 and the extension line of the second flow path 124 reach the lowest end of the side surface of the partition wall 133. The extension line of a certain part and the extension line of the part which is the 2nd flow path 124 should just be able to cross | intersect the partition 133, and can also be made to reach the upper side rather than the lowest end of the side surface of the partition 133. Even in this case, compared with the case where the extension line of the first flow path 123 and the extension line of the second flow path 124 reach the base end surface of the partition wall 133, the chemical solution can be guided to the third conduit 113. However, when the extension line of the first flow path 123 and the extension line of the second flow path 124 reach the lowermost end of the side surface of the partition wall 133, it is easier to secure the depth of the groove 121 that becomes the flow path. Securing the flow rate is easy.

As shown in FIG. 4, when the plug body 102 is set to the first position, the outer end of the first flow path 123 is the lower end (lower end face) at the base end of the first conduit 111. It is preferable that the outer end portion of the second flow path 124 is located slightly below the lower surface of the end portion of the second conduit 112. When the surgeon operates the plug body 102, it is difficult to align the positions so as not to cause a complete shift, and a shift of a degree larger than 0 ° and smaller than ± 6 ° is usually generated. When the plug body 102 is completely aligned with the first position, the ends of the first flow path 123 and the first conduit 111 and the ends of the second flow path 124 and the second conduit 112 are If they are completely matched, a slight difference in alignment may cause a step that closes the proximal end of the first pipeline 111. If a level difference that blocks the proximal end of the first pipe line 111 occurs, the flow rate is limited, which causes retention. On the other hand, when the stopper 102 is completely aligned with the first position, if the outer end of the first flow path 123 is positioned slightly below the lower surface of the end of the first conduit 111, Even in the case of misalignment, it is possible to make it difficult to generate a step that closes the end of the first pipeline 111. The same applies to the relationship between the second flow path 124 and the second pipe line 112.

Further, as shown in FIG. 5, when the plug body 102 is in the second position, the outer end of the fifth channel 129 on the second conduit 112 side is the upper side at the base end of the second conduit 112. The outer end of the fifth channel 129 on the first conduit 111 side is slightly above the front of the end at the base end of the first conduit 111. It is preferable to be located at. By adopting such an arrangement, even when the plug body 102 is slightly deviated from the second position, a step that closes the end of the first pipeline 111 is unlikely to occur, and the first pipeline 111 and the second pipeline The chemical solution can flow smoothly between the pipe 112 and the fifth channel 129.

In the present embodiment, the valve body 134 provided in the third conduit 113 can be a slit valve having a slit. By using the slit valve, a male luer connector such as a luer syringe can be inserted into the third conduit 113 and the chemical solution can be easily injected. Moreover, the terminal of the 3rd pipe line 113 can be closed again by extracting a male luer connector.

In the present embodiment, the example in which the valve body 134 that closes the end of the third pipe 113 is sandwiched between the outer housing 137 and the inner housing 136 is shown, but the fixing method of the valve body 134 is not limited thereto. You can do anything. In addition, although the thread 138 for engaging the coupler with the outer housing 137 is provided, the structure without the thread 138 may be employed. The third conduit 113 can be a connector other than the needleless connector as long as it can inject a chemical solution and close the end. For example, it can be set as the structure which provides a valve body without a slit and inject | pours a chemical | medical solution using an injection needle. Moreover, as shown in FIG. 8, it is also possible to use a simple female connector to which a luer syringe or the like can be connected.

In the present embodiment, an example in which the first pipe line 111 is a female luer connector and the second pipe line 112 is a male luer connector is shown, but what kind of connector is used for the first pipe line 111 and the second pipe line 112? It is good. For example, even if a female luer connector and a male luer connector are interchanged, both may be a male luer connector or a female luer connector. Moreover, you may be directly connected with the pipe etc. instead of the connector. In the present embodiment, the upstream pipe line can be gradually reduced in diameter toward the main body. By adopting such a configuration, it is possible to make it difficult for the liquid to stay in the upstream pipe line.

In the present embodiment, an example in which the medical stopcock is a three-way stopcock has been shown. However, the present invention is not limited to a three-way stopcock, and a medical stopcock having a branch for injecting a chemical solution can be configured similarly. For example, it can also be set as the structure by which the 4th pipe line was provided in the opposite side to the 3rd pipe line.

The medical stopcock of the present embodiment is less likely to cause retention of the chemical solution in the pipeline, and is useful as a medical stopcock connected to a medical circuit such as an infusion circuit.

101 Main Body 102 Plug 105 Handle 111 First Pipe 112 112 Second Pipe 113 Third Pipe 121 Groove 123 First Channel 124 Second Channel 127 Third Channel 128 Fourth Channel 129 Fifth Channel 131 First part 132 Second part 133 Partition 134 Valve element 135 Reduced diameter part 136 Internal housing 137 External housing 138 Thread

Claims

A cylindrical body;
A first pipe line, a second pipe line, and a third pipe line connected to the side surface of the main body at intervals in the circumferential direction;
The outer peripheral surface is supported by the inner peripheral surface of the main body, and includes a columnar plug body that is rotatable relative to the main body,
The third pipe line has a partition wall that divides the inside of the third pipe line,
The plug has a groove provided on the outer peripheral surface thereof,
The first conduit and the second conduit are constituted by the groove and an inner wall surface of the main body when the plug body is in the first position, and the first conduit and the third tube A first flow path for connecting a path, the groove and the inner wall surface of the main body, a second flow path for connecting the second pipe and the third pipe, and an outer peripheral surface of the partition wall And an inner wall surface of the third pipe line, a third flow path connecting the first flow path and the second flow path, a groove portion, and an end surface of the partition wall on the main body side. A medical stopcock connected by a fourth flow path connecting the first flow path and the second flow path.
When the plug body is in the first position, an extension line of a portion that becomes the first flow path in the groove portion reaches a side surface of the partition on the first conduit side, and the second flow in the groove portion. The medical stopcock according to claim 1, wherein an extension line of a portion that becomes a path reaches a side surface of the partition wall on the second conduit side.
2. When the plug body is in the first position, a portion to be the first flow path in the groove portion intersects the partition wall and extends in a direction toward the third pipe line. Medical stopcock as described.
The third flow path has a first portion on the first conduit side and a second portion on the second conduit side,
When the plug body is in the first position, the end portion on the third pipe line side of the portion that becomes the first flow path in the groove portion has the first portion of the third flow path in the main body. The stopcock for medical use according to claim 1, which is located within a range extended to the above.
The medical stopcock according to any one of claims 1 to 4, wherein the third conduit has a reduced diameter portion that gradually decreases in inner diameter toward the main body.
The medical stopcock according to any one of claims 1 to 5, wherein a width of the end portion on the main body side in the third conduit is equal to or greater than a width of the groove portion.
The medical stopcock according to claim 6, wherein the groove has a width of 1.5 mm or more and 4.0 mm or less.
The third pipe line can be inserted with a male connector from the end opposite to the main body,
The medical stopcock according to any one of claims 1 to 7, wherein a distal end of the inserted male connector comes into contact with an end face of the partition wall.
The medical stopcock according to any one of claims 1 to 8, wherein the diameter of the first conduit is reduced toward the main body.
10. The outer edge of the first flow path at the first position is provided so as to be lower than the lower surface of the end of the first pipe line. A stopcock for medical use according to 1.