JPH1194103A - Medically used cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medically used cock which switches injection routes arbitrarily, provides cut-off ability to the outside, restrains possibility of bacterial contamination, and administers chemical without their stagnation. SOLUTION: This medically used cock consists of a cylindrical body 1 having at least two branch pipes 2, 3 on its side wall, a rubber-shaped elastic body 5 which is fitted with one end of the body 1 and is pricked by needle sections of side injection components or mixing injection components, a cock 6 which is water-tightly and rotatably fitted with the other end of the body 1, has a handle section 8 exposed outside from the other end of the body 1 at its one end, and has a switching section 9 for blocking or releasing flow into the inner cavity of the branch pipes 2, 3 due to rotational operation of the handle section 8 at its another end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for temporarily or long-term co-infusion of a drug solution into an infusion line or for collecting blood from an arterial line, and switches an injection route such as injection of a main drug solution or side injection. The present invention relates to a medical stopcock provided with a septum that has a function and is connected to a side injection part such as a syringe for performing side injection of a chemical solution and shuts off the outside.

[0002]

2. Description of the Related Art Infusion of other medical solutions during various infusions including central parenteral nutrition therapy is performed in parallel or temporarily with the infusion. In these cases, the infusion route is used. In the meantime, a method is commonly used in which a co-injection section to which an infusion line of another route is connected is provided in advance, and a drug solution is injected through the co-infusion section. As a part used in the co-injection part, a co-injection rubber tube (top rubber), a Y-type or the like liquid co-injection device (also referred to as a T-shaped tube) or a three-way cock is known.

Also, in arterial lines for continuous arterial pressure monitoring, etc., a method is also known in which a branch having substantially the same effect as that of the co-injection part is provided in the middle of the line, and blood is collected from the branch whenever necessary. Is used.
A three-way cock is generally used as a component used in the branch portion. Although there is a multi-way cock with an increased number of branch pipes of the three-way cock, a representative three-way cock will be described here as an example.

A three-way cock used for a co-injection part or a branch part is obtained by twisting (turning) a cock provided on the three-way cock.
Block the upstream route of the main drug solution, push the plunger of the syringe connected to the branch pipe for side injection with any force and speed, and inject the side drug solution into the downstream route, that is, the patient's body, etc. Since switching of the injection route is convenient, it is most frequently used at present.

FIG. 11 is a plan view and a cross-sectional view of a conventional representative three-way cock. In the figure, 31 is 3 on the side wall.
Branched pipes 32, 33, 34 branching in the direction are cylindrical bodies having a bottom and integrally formed, and the branch pipes 32, 33 are provided such that their respective lumens are aligned through the main body 31. In addition, an inlet 32a is formed at an end of the branch pipe 32, and an outlet 33a is formed at an end of the branch pipe 33. The branch pipe 34 is provided such that the inner lumen thereof is located at an even angle of approximately 90 ° between the branch pipes 32 and 33, and a co-injection port 34a is formed at an end. And
The outer walls of the injection port 32a and the co-injection port 34a of the branch pipes 32 and 34 have screw portions 32b and 34 to which caps 35 for closing the ports 32a and 34a are attached when not in use.
The outer wall of the outlet 33a of the branch pipe 33 is formed in a tapered shape so that a tube (not shown) communicating with, for example, a blood vessel in a patient's body is connected.

Reference numeral 36 denotes a cock for switching the injection route, a cylindrical shaft portion 37 rotatably fitted in the main body 1, and one of the branch pipes 32, 33, 34
Knobs 38 extending horizontally with respect to the axial direction of
a, 38b, 38c, and a knob 38a, 38b, 38c of the head 38 on the shaft 37, as shown in FIG.
When in the same direction as 33, 34, each branch pipe 32, 3
A substantially T-shaped communication hole 37a for communicating the third and the third 34 is provided.

[0007] A tube (not shown) is connected to the inlet 32 a of the branch pipe 32, and the outlet 33 a of the branch pipe 33 is connected.
Is connected to a tube connected to a blood vessel or the like in the patient's body, and the cock 36 is rotated so that only the branch pipes 32 and 33 are connected through the communication hole 37a. Administer to the blood vessels via the main route. At this time, a cap 35 is attached to the co-injection port 34a of the branch pipe 34. When performing side injection, the cap 35 of the branch pipe 34 is removed, for example, a luer tip (not shown) of an injection cylinder is fitted into the co-injection port 34a and connected, and only the branch pipes 33 and 34 are connected to the communication holes 37a. The cock 36 is rotated so as to be communicated via a side injection route, and this is used as a side injection route, and a side injection solution such as a high-concentration small amount of a chemical solution is injected one-shot into a blood vessel via the side injection route. After the side injection, the cock 36 is rotated to administer the main drug solution through the main route, the luer tip of the syringe is removed from the co-injection port 34a, and the cap 35 is attached. Furthermore, when performing side injection while administering the main drug solution, the cap 35 of the branch pipe 34 is removed, the luer tip of the injection cylinder is inserted into the co-injection port 34a and connected, and the branch pipes 32 and 3 are connected.
The cock 36 is rotated so that the liquids 3 and 34 communicate with each other through the communication hole 37a, and the main drug solution and the side injection liquid are administered.

[0008]

The conventional three-way cock described above is convenient and frequently used because it can be switched to an arbitrary injection route only by turning the cock 36.
However, for example, when the main solution is to be administered on the main route by the branch pipes 32 and 33, the branch pipe 34 is not used, and the blockage is performed only by attaching the cap 35 to the screw portion 34b of the branch pipe 34. , Because it does not have a septum that blocks the outside, it is impossible to prevent the invasion of bacteria, and the possibility of bacterial contamination has become high,
A major problem, such as the retention of the drug solution remaining in the lumen of the co-injection port 34a into which the luer tip of the injection cylinder, which is one of the side injection parts, is fitted and becomes a breeding ground for bacterial growth. was there.

[0009] That is, some liquid medicines can be an excellent medium for bacteria, such as high-calorie infusion used in central parenteral nutrition therapy.
The lumen 4 always has the danger of touching the outside air or contacting contaminated bed sheets and the like every time the luer tip of the syringe barrel is attached and detached, and the branch pipe 34 has a substantially concave cross-section and a recessed shape. Therefore, it is difficult to wipe off or disinfect the remaining chemical solution, and it has been difficult to prevent the bacteria that have once invaded from growing in the lumen.

[0010] Further, in actual clinical treatment, it is necessary to administer a large amount of medicinal solution, so that the injection route is frequently switched, that is, the luer tip of the injection cylinder is detached, etc. Bacteria that multiply in the lumen of the branch tube 34 may enter the interior of the three-way stopcock due to the attachment / detachment of the luer tip of the injection cylinder or the drug solution at the next administration of the drug solution, and may eventually flow into the patient's body. there were.

Therefore, in order to solve such a problem, as shown in FIG. 12, instead of the cap 35, a rubber-like elastic body 39a which is a septum for shutting off the outside is provided at one end. At the other end, a threaded portion 34b of the branch pipe 34
A three-way cock fitted with an infusion plug 39 provided with a screw portion 39b screwed into the joint tube, or as shown in FIG. A three-way cock fitted with a rubber-like elastic body 40 is conceivable. In both cases, when the branch pipe 34 is not used, bacteria are prevented from entering from outside by the rubber-like elastic bodies 39a and 40, and when the branch pipe 34 is used. In, side injection is performed by puncturing the needle portion of a syringe barrel.

[0012] However, the three-way cock shown in FIG.
The space (hereinafter, referred to as dead space S) of the chemical solution formed in the inner cavity of the infusion plug 39 and the inner space of the infusion plug 39 becomes large. May stay in the dead space S and may not be administered to the patient's body. If the patient does not respond to the medicinal solution and further administers the medicinal solution, there is a problem that a large amount of the medicinal solution together with the medicinal solution staying in the dead space S enters the patient's body.

[0013] Further, when blood is collected from a patient and blood is collected using the three-way cock, it is meaningless to collect the blood in a state diluted with an infusion solution.
4 and the blood is returned to the upstream of the infusion plug 39, and the blood is collected after being filled with the blood of the patient not diluted to the vicinity of the rubber-like elastic body 39a,
Thereafter, a procedure is generally used in which the infused blood is returned to return the blood that has flowed back into the blood vessel. However, the dilution by the infusion is not eliminated unless a considerable amount of blood is caused to flow backward due to the dead space S, and the blood in the lumen of the infusion plug 39 and the branch tube 34 is not washed away with a considerable amount of the infusion even after the blood collection is completed. There were inconveniences such as must not. Particularly, in the arterial line, it is necessary to perform blood collection frequently, and such an inconvenience is fatal. The dead space S also causes problems such as difficulty in removing bubbles generated in the middle of the infusion line and troublesome air bleeding when the infusion line is first filled with the infusion. Furthermore, since the dead space S is large, there may be a hotbed for bacterial growth of bacteria that have inadvertently entered.

Although the three-way cock shown in FIG. 13 has almost no dead space S, the above-mentioned problem does not occur. However, when the side injection is performed, the lumen of the branch pipe 34 is omitted. In a state where the co-injection port 34a side of the branch pipe 34 is closed by the shaft portion 37 of the cock 36, the puncture space of the needle portion 41a of the injection cylinder 41 is extremely small, and it is difficult to puncture. As shown in FIG. Even when the needle portion 41a is punctured using the hole 37a, the cock 36 cannot be rotated while the needle portion 41a is in the obstructed state and the injection route can be arbitrarily switched. There were problems, such as not being able to get. In addition, when side injection is performed using such a three-way cock, the operability is poor because the needle 41a must be inserted and removed each time the side injection is performed, so that invasion of bacteria may be prevented in some cases. There were also problems such as not being able to.

[0015] The present invention has been made to solve the above-mentioned problems, and the injection route can be arbitrarily switched, has a blocking property with the outside, and suppresses the possibility of bacterial contamination.
It is an object of the present invention to provide a medical stopcock with good operability that can reliably administer a drug solution or the like by side injection without stagnation.

[0016]

A medical stopcock according to the present invention has a cylindrical main body having at least two branch pipes provided on a side wall thereof, and a side injection part or co-injection fitted to one end of the main body. A rubber-like elastic body into which a needle part or the like of a part is pierced, and a handle part liquid-tightly and rotatably fitted to the other end of the main body and having one end exposed to the outside from the other end of the main body. And a cock provided at the other end with a switching portion for closing or opening the flow into the lumen of the branch pipe based on the turning operation of the handle portion.

In the medical stopcock according to the present invention, the cock is provided with a cylindrical shaft portion fitted to the other end of the main body in a liquid-tight and rotatable manner, and the other end of the main body at one end of the shaft portion. A handle portion exposed to the outside from the end of the shaft portion to rotate the shaft portion, and a handle portion provided at the other end edge of the shaft portion and located in the chamber portion of the main body communicating with the respective lumens of the branch pipe; And a switching unit that closes or opens the flow to the lumen of the branch pipe based on the turning operation of the handle.
The switching unit closes one of the lumens of the branch pipe or opens both the lumens.

A stopcock for medical use according to the present invention is provided with a cylindrical main body having at least two branch pipes provided on a side wall, a liquid-tight and rotatably fitted inside the main body, and a side injection part or co-injection at one end. A plurality of communicating parts which are provided with a handle part fitted with a rubber-like elastic body into which a needle part or the like of a part is pierced and exposed to the outside from one end of the main body, and having a side wall at the other end communicating with the lumen of the branch pipe; A cock having a hole and a bottomed cylindrical switching portion for closing the other end of the main body with the bottom surface and closing or opening the flow to the lumen of the branch pipe based on the turning operation of the handle portion It consists of:

A medical stopcock according to the present invention has a bottomed cylindrical body provided with at least two branch pipes on a side wall, a liquid-tight and rotatably fitted inside the body, and a side note part at one end. Alternatively, a handle is fitted with a rubber-like elastic body into which a needle portion or the like of the co-injected part is pierced and is exposed to the outside from one end of the main body. And a cock provided with a switching unit for closing or opening the flow into the inner cavity.

Further, in the medical cock according to the present invention, the switching portion is constituted by a projecting portion projecting from the other end of the cock and having at least an outer wall formed in an arc shape so as to be along the peripheral wall of the chamber portion of the main body. It was done.

Further, in the medical stopcock according to the present invention, the switching portion has a height such that the upper end is located at or near the rubber-like elastic body at the other peripheral edge of the cock, and the outer diameter is the inner diameter of the main body. And a cylindrical portion having, on the side wall, a plurality of communication holes that communicate with the lumen of the branch pipe and the chamber portion of the main body based on the turning operation of the handle portion.

In the medical stopcock according to the present invention, the switching portion may have a height such that an upper end portion is located at or near the inner surface of the bottom of the main body at the peripheral edge of the other end of the cock. And a cylindrical portion having, on the side wall, a plurality of communication holes that communicate with the lumen of the branch pipe and the chamber portion of the main body based on the turning operation of the handle portion.

In the medical stopcock according to the present invention, a substantially vertical slit is provided substantially at the center of the rubber-like elastic body.

The medical stopcock according to the present invention has a blunt needle pierced by a rubber-like elastic body and a lumen communicating with the lumen of the blunt needle on the side wall of the main body, to which a side injection part or a co-injection part is connected. Alternatively, a connecting portion provided with a connecting portion to be connected is provided with a locking portion for locking.

In the medical stopcock according to the present invention, when the connecting device is locked to the locking portion of the main body, the locking portion has a function of positioning a blunt needle of the connecting device.

Further, in the medical stopcock according to the present invention, the connecting tool is locked to the locking portion of the main body on the tip side wall of the blunt needle of the connecting tool, and the tip of the blunt needle is positioned by the positioning function of the locking portion. When the portion abuts on the other end of the cock, the bottom inner surface of the bottomed cylindrical switching portion or the bottom inner surface of the bottomed cylindrical body, at least communication between the lumen of the blunt needle and the lumen of the branch pipe is made. It has one side hole.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a top view of Embodiment 1 of the present invention,
1 is an AA sectional view of a plan view, a bottom view, and a top view, and FIG. 2 is an operation explanatory view shown by a BB section of the plan view of FIG. In the figure, 1 is, for example, polycarbonate (PC), polyethylene terephthalate (PET) or PET / PC
A main body of a stopcock for medical use made of a transparent plastic material such as an alloy.
Are formed integrally with each other, and the branch pipes 2 and 3 have respective lumens communicated with each other via the chamber 1a of the main body 1 to form a main route through which a main chemical solution (infusion solution) flows. . An inlet 2a is formed at an end of the branch pipe 2, an outlet 3a is formed at an end 3a of the branch pipe 3, and an inlet 2a of the branch pipe 2 is formed in a female luer shape. Has a screw portion 2b to which a cap (not shown) for closing the inlet 2a is attached when not in use, the outlet 3a of the branch pipe 3 is formed in a male luer shape, and an extension tube (not shown) Needless to say, a luer tip (not shown) of a syringe or an outlet of another medical stopcock of the same shape is connected to the inlet 2a, and an outlet of another medical stopcock of the same shape is connected to the outlet 3a. An inlet or the like is connected so that a plurality of co-infusion lines are connected to one infusion line. An annular recess 4 is formed on the inner wall near the lower end of the main body 1.

Reference numeral 5 denotes a rubber-like elastic body made of a synthetic rubber material such as natural rubber or isopropylene rubber and having a slit 5a provided substantially vertically at a substantially central portion.
It is fitted into the co-injection port 1b formed at the upper end of the septum, and is a septum that blocks the outside and forms a side injection route for performing side injection and the like. The lower surface 5b of the rubber-like elastic body 5, that is, the liquid-contacting surface, has a cross-sectional surface for imparting repeated puncture durability, for example, to reduce the insertion resistance of the needle portion of the syringe barrel and to smooth the flow of liquid such as infusion. It is formed in an arc shape.

Reference numeral 6 denotes a cock which is made of a colored plastic material such as polyethylene or polypropylene and arbitrarily switches an injection route such as a main route or a side injection route. The combined shaft portion 7 is integrally formed on the lower side wall of the shaft portion 7 so as to be exposed to the outside from the lower end portion of the main body 1, and extends substantially horizontally with respect to the axial direction of the branch pipe 3, for example.
And a handle portion 8 for rotating the shaft portion 7 and projecting upward from an upper edge of the shaft portion 7, and at least an outer wall of the handle portion 8
a is formed in an arc shape along the peripheral wall of the handle portion 8.
And a protruding portion 9 that is a switching portion that closes or opens the flow into the lumen of the branch pipe 2 or the branch pipe 3 based on the turning operation of. The main body 1 is provided on the outer wall of the shaft portion 7.
A plurality of or annular projections 7a are formed so as to be fitted into the recesses 4 and to be rotatable without the shaft 7 coming out of the main body 1. When the handle portion 8 is located on the branch pipe 3 side, the protruding portion 9 blocks the flow to the lumen of the branch pipe 3, and the main route is closed and in the OFF state.

In the first embodiment configured as described above, when performing infusion of the main drug solution, first, an extension tube (not shown) is connected to each of the branch pipes 2 and 3, and then connected to the branch pipe 3. The distal end of the extended tube is connected to the base of an indwelling needle placed in a blood vessel of a patient. At this time, the handle portion 8 of the cock 6 is located in the OFF state on the side of the branch pipe 3, and as shown in FIG. Is closed. Then, FIG.
As shown in (b), the cock 6 is rotated so that the handle portion 8 thereof is substantially perpendicular to the branch pipes 2 and 3, and the blockage of the lumen of the branch pipe 3 by the projection 9 is released. The chemical solution is sent from the extension tube connected to the branch pipe 2 to the inlet 2a,
It is sent from the lumen of the branch pipe 2 which is the main route to the lumen of the branch pipe 3 through the chamber portion 1a of the main body 1, and further passes through the outlet 3a and the extension tube connected to the branch pipe 3 to the body of the patient ( To the blood vessels). During the infusion, a rubber-like elastic body 5 provided at the co-injection port 1b of the main body 1 to block the outside.
This prevents bacteria from entering the infusion line.

When a side injection liquid, which is a high-concentration small-quantity liquid medicine, is injected by one-shot, first, as shown in FIG. This blocks the flow of the branch pipe 3 into the lumen. Next, the needle of a syringe (not shown) is punctured into the rubber-like elastic body 5 along the slit 5a, and the needle is inserted so that the tip of the needle is located substantially at the center of the chamber 1a of the main body 1. . Then, as shown in FIG. 2C, the cock 6 has its handle portion 8 located on the side of the branch pipe 2, and the projection 9 releases the blockage of the branch pipe 3 and the flow from the inner cavity of the branch pipe 2. Is rotated so as to close. Next, the side injection solution in the injection cylinder is sent from the needle portion to the lumen of the branch tube 3 through the chamber portion 1a of the main body 1, which is the side injection route, by pushing the plunger of the injection tube. One-shot injection into the patient's body (blood vessel) through the extension tube connected to 3. At this time, the side injection is smoothly injected without forming a dead space in the main body 1. After the end of the side injection, the handle 6 of the cock 6 is positioned in the OFF state on the side of the branch pipe 3, and the projection 9 releases the blockage of the lumen of the branch pipe 2 and blocks the flow to the lumen of the branch pipe 3. To rotate,
The needle portion of the syringe is withdrawn from the rubber-like elastic body 5 to complete the side injection.

Here, when performing the one-shot side injection, as shown in FIG. 3, the blunt needle 11 whose outer diameter of the outer wall at the distal end is reduced toward the distal end, and the lumen of the blunt needle 11 1
A connector 10 having a lumen 12a communicating with 1a and a connecting portion 12 formed in a female luer shape may be used. In this case, the blunt needle 11 of the connecting tool 10 is
Is punctured along the slit 5a, the luer tip of the syringe is connected to the connecting portion 12, and the side injection liquid in the syringe pushes the plunger of the syringe, whereby the lumen 1 of the blunt needle 11 is pressed.
1a is sent to the lumen of the branch pipe 3 through the chamber portion 1a of the main body 1 and further injected into the patient's body (blood vessel) through the outlet 3a and the extension tube connected to the branch pipe 3. You.

Next, when another drug solution is continuously co-injected during the infusion of the main drug solution, a connector (not shown) having a function of fixing the main body 1 to the connector 10 shown in FIG. Is used. During the infusion of the main drug solution, the handle portion 8 of the cock 6 is once set to the OFF state, the flow into the lumen of the branch pipe 3 is blocked by the protruding portion 9, and the blunt needle of the connector is attached to the rubber-like elastic body 5. Is inserted along the slit 5a so that the tip of the blunt needle is positioned substantially at the center of the chamber 1a of the main body 1. Next, the distal end portion of the extension tube is connected to the connecting portion of the connecting tool, and the cock 6 is rotated so that the handle portion 8 thereof is substantially perpendicular to the branch tubes 2 and 3, and the cock 9 of the branch tube 3 is protruded. Releasing the obstruction of the lumen, and allowing another medicinal solution from the extension tube connected to the connecting portion of the connector to the chamber portion 1a of the main body 1 from the distal end of the extension tube through the lumen of the blunt needle of the connector. The mixture is sent to the lumen of the branch pipe 3 while being mixed with the main drug solution flowing through the main route, and is continuously co-injected into the body (blood vessel) of the patient from the outlet 3a and the extension tube connected to the branch pipe 3. At this time, other chemicals are co-injected with the main chemical without forming a dead space in the main body 1.

In the case of intermittently injecting or co-injecting another medicinal solution during the infusion of the main medicinal solution, a connector or the like having a fixing function is used similarly to the case of continuously injecting another medicinal solution. With the blunt needle of the connecting tool inserted into the rubber-like elastic body, the extension tube connected to the connecting part of the connecting tool is closed or opened with a clamp or the like. At this time, the handle portion 8 of the cock 6 is connected to the branch pipe 2, as shown in FIG.
3, and the blockage of the lumens of the branch pipes 2 and 3 by the protrusion 9 is released. In the case of side injection, the extension tube connected to the connection portion of the connection tool is closed or opened with a clamp or the like, and the cock 6 is closed.
Is turned to close or release the lumens of the branch pipes 2 and 3 by the protruding portions 9.

Further, when blood is collected, the handle portion 8 of the cock 6 is set to the OFF state and the branch tube 3 is protruded by the protruding portion 9 as in the case of the one-shot side injection described above.
Is closed, and the needle of the syringe is punctured into the rubber-like elastic body 5 along the slit 5a so that the tip of the needle is located substantially at the center of the chamber 1a of the main body 1. Insert Then, the cock 6 is rotated so that the handle portion 8 is positioned on the side of the branch pipe 2 and the protrusion 9 releases the blockage of the branch pipe 3 and closes the flow from the lumen of the branch pipe 2.
By pulling the plunger of the syringe, the blood is caused to flow back to the lumen of the branch tube 3 and the chamber 1a of the main body 1, and undiluted blood is collected by the syringe. After collection, an infusion solution is allowed to flow from the syringe to return the blood that has flowed back into the blood vessel. At this time,
The protruding portion 9 blocks the flow of blood flowing back to the chamber portion 1a of the main body 1 into the lumen of the branch pipe 2 and the flow of infusion and the like from the lumen of the branch pipe 2 and causes dead blood in the main body 1. Since no space is formed, it is possible to collect blood by flowing a necessary minimum amount of blood to the main body 1 side, and even after the blood collection is completed, the blood in the main body 1 and the branch tube 3 can be washed away with a minimum infusion.

As described above, the branch pipes 2 and 3 are provided at positions opposing each other on the side wall of the main body 1, and the rubber-like elastic body 5 is fitted into the co-injection port 1 b formed at the upper end of the main body 1. , 3 has a protruding portion 9 for closing or opening the flow into the lumen, and the cock 6 capable of switching the injection route based on the rotating operation is fitted to the lower part in the main body 1 in a liquid-tight and rotatable manner. In the infusion of the main chemical solution through the main route, the rubber-like elastic body 5 is used.
Accordingly, it is possible to reliably prevent bacteria from entering the infusion line. In the one-shot side injection, the injection route is switched to the side injection route while the needle part of the injection cylinder or the blunt needle 11 of the connector 10 as the side injection component is inserted into the rubber-like elastic body 5. Since no dead space is formed in 1, the side injection liquid can be reliably side injected,
When the patient does not respond to the side injection solution and additionally administers the side injection solution, there is no possibility that a large amount of side injection solution will be side-injected to the patient together with the side injection solution remaining in the dead space. And
Since no dead space is formed even in blood collection, it is possible to collect blood by backflowing a minimum necessary amount of blood, and the main body 1 and the branch pipe 3 can be washed away with a minimum infusion after collection. This is very convenient in arterial lines that require frequent blood sampling. The same effect can be obtained in removing bubbles or removing air.

Furthermore, when intermittent or side injection is performed intermittently, for example, the cock 6 is rotated while the blunt needle of the connector is inserted into the rubber-like elastic body 5 and the branch pipe by the protrusion 9 is formed. Since a few lumens can be closed or opened, a medical stopcock that is easy to handle can be obtained.

In the first embodiment, the branch pipes 2,
Although the case where 3 is provided at a position facing the side wall of the main body 1 is shown, the present invention is not limited to this, and the branch pipes 2 and 3 may be provided at an inclined position without facing each other. A plurality may be provided.

Embodiment 2 FIG. 4 is a side view showing a part of the second embodiment of the present invention in cross section and its CC cross section. In the second embodiment, in the cock 6 according to the first embodiment, instead of the protrusion 9, the upper end is located at the peripheral edge of the upper surface of the shaft portion 7 in contact with or near the lower surface 5 b of the rubber-like elastic body 5. And a cylindrical portion 13 having an outer diameter substantially equal to the inner diameter of the main body 1.
Are provided with a plurality of communication holes 13a, 13b, and 13c on the side wall of. Then, as shown in FIG. 4, when the handle portion 8 of the cock 6 is in the branch pipe 3 side, that is, in the OFF state,
When the lumen of the branch pipe 2 communicates with the chamber 1a of the main body 1 through the communication hole 13c, and the handle 8 of the cock 6 is at a position substantially orthogonal to the branch pipes 2 and 3, as shown in FIG. The communication holes 13a and 13b allow the lumens of the branch pipes 2 and 3 to communicate with each other via the chamber 1a of the main body 1.
As shown in FIG. 6, the handle portion 8 of the cock 6 is
When it is on the side, the lumen of the branch pipe 3 is configured to communicate with the chamber portion 1a of the main body 1 through the communication hole 13c.

With such a structure, substantially the same operation and effect as those of the first embodiment can be obtained, and the rubber-like elastic body 5 reliably prevents bacteria from entering the infusion line.
The side injection and the like can be reliably performed without forming a dead space in the main body 1, and the lumens of the branch pipes 2 and 3 can be reliably closed by the cylindrical portion 13.

Embodiment 3 FIG. 7 is a longitudinal sectional view of a third embodiment of the present invention. In the third embodiment, a co-injection port 1b is omitted in the main body 1 according to the second embodiment.
In the cock 6 according to the second embodiment, the shaft portion 7 is formed in a cylindrical shape having a diameter larger than the outer diameter of the outer wall of the cylindrical portion 13, and a co-injection port 14 is provided at a lower end portion. A rubber-like elastic body 5 having a slit 5a at a substantially central portion is fitted in the inner cavity. Note that the upper surface 5c of the rubber-like elastic body 5 is
It is formed in an arcuate cross section in order to provide repeated puncture durability, reduce insertion resistance, and smooth flow of liquid such as infusion.

With this configuration, substantially the same operation and effect as those of the second embodiment can be obtained, and the rubber-like elastic body 5 reliably prevents bacteria from entering the infusion line.
The side injection and the like can be reliably performed without forming a dead space in the main body 1, and the lumens of the branch pipes 2 and 3 can be reliably closed by the cylindrical portion 13.
In addition, since the co-injection port 1b at the upper end of the main body 1 is omitted, a medical stopcock can be obtained in which the isolation from the outside is enhanced and the possibility of bacterial contamination is suppressed.

Embodiment 4 FIG. FIG. 8 is a longitudinal sectional view of a fourth embodiment of the present invention. In the fourth embodiment, in the cock 6 according to the third embodiment, the cylindrical portion 13 is formed in a closed cylindrical shape. The upper surface of the main body 1 is provided with a fitting hole 1c into which the lid 13d of the cylindrical portion 13 fits.

With this configuration, substantially the same operation and effect as those of the third embodiment can be obtained, and the rubber-like elastic body 5 reliably prevents bacteria from entering the infusion line.
Side injection and the like can be reliably performed without forming a dead space in the main body 1.
3 can be reliably closed.

Embodiment 5 FIG. FIG. 9 is a side view, a DD sectional view, and an EE sectional view of Embodiment 5 of the present invention. The fifth embodiment is used when the main body 1 according to the first embodiment is provided with a locking portion 15 at a lower portion of a side wall substantially orthogonal to the branch pipes 2 and 3 to continuously co-inject other chemicals. The connection tool 16 described later is configured to be detachably attached.

The connecting member 16 includes a pair of side plates 17.
a, 17b and a connecting plate 17c connecting the both side plates 17a, 17b to form a substantially H-shaped plane.
A plurality of non-slip projections 17d are provided on the outer surface of the upper portion, the width being narrower as the interval between a and 17b becomes lower.
Also, a connecting portion 17 having a locking claw 17e projecting inward from each other and locking to the locking portion 15 of the main body 1 is provided at a lower end portion, and a female luer-shaped connecting portion provided substantially at the center of the connecting plate 17c. And a blunt needle 19 having an outer diameter of the outer wall of the distal end portion reduced toward the distal end portion and having a lumen 19a communicating with the lumen 18a of the coupling portion 18 at a substantially central portion of the lower surface of the coupling portion 18; It is constituted by. Also, the main body 1
Has a function of positioning the blunt needle 19 of the connection tool 16, and engages the locking claw 17 e of the connection tool 16 with the locking portion 15 of the main body 1 as shown in FIG. Blunt needle 1 while stopping
When the needle 9 is punctured and inserted into the rubber-like elastic body 5, the distal end portion 19 b of the blunt needle 19 is positioned such that a gap G is formed between the distal end portion 19 b and the upper surface of the shaft portion 7 of the cock 6.

In the fifth embodiment configured as described above, when continuously injecting another chemical solution during the infusion of the main chemical solution, first, the handle portion 8 of the cock 6 is set to the OFF state and the projecting portion is formed. 9, the flow of the branch pipe 3 into the lumen is closed, the blunt needle 19 of the connector 16 is pierced into the rubber-like elastic body 5 along the slit 5 a, and the connection of the connector 16 is further inserted while the blunt needle 19 is inserted. The locking pawl 17e is locked to the locking portion 15 of the main body 1. Next, the distal end portion of the extension tube is connected to the connecting portion 18 of the connecting tool 16, and the cock 6 is rotated so that the handle portion 8 thereof is substantially perpendicular to the branch tubes 2 and 3, and the branch tube formed by the protrusion 9 3 is released, and another medicinal solution from the extension tube connected to the connection portion 18 of the connection tool 16 is released from the distal end of the extension tube to the lumen 1 of the blunt needle 19 of the connection tool 16.
9a to the chamber portion 1a of the main body 1 and the mixed solution with the main chemical flowing through the main route and sent to the lumen of the branch pipe 3, and from the extension tube connected to the discharge port 3a and the branch pipe 3 to the inside of the patient's body. Continuously inject into (blood vessel). At this time, other chemicals are co-injected with the main chemical without forming a dead space in the main body 1. It should be noted that this connector 16 is also used for intermittently injecting or co-injecting another drug solution during the infusion of the main drug solution, and for performing one-shot side injection, the luer tip of the syringe barrel is used to insert the needle portion. Is removed and the luer tip of the syringe is connected to the connecting portion 18 of the connecting tool 16.

As described above, the locking portion 1 is provided at the lower portion of the side wall of the main body 1.
5 is provided, and the locking claw 17e of the connecting tool 16 is
And the connecting tool 16 can be securely connected, so that it is possible to obtain a medical stopcock with high fixability in long side injection or co-injection for a long time and good operability and easy handling. Further, since one-shot side injection or the like can be performed without using the needle part of the injection cylinder, damage to the rubber-like elastic body 5 caused when the needle part passes through the rubber-like elastic Needle bending that occurs when puncture is inserted,
Damage to the shaft portion 7 caused by the needle contacting the upper surface of the shaft portion 7 of the cock 6, the rubber-like elastic body 5 caused by damage to the rubber-like elastic body 5 and the like, and fragments of the shaft portion 7 into the patient's body. Transport and the like can be prevented. Furthermore, the rubber-like elastic body 5 can reliably prevent bacteria from entering the infusion line, and can reliably perform side injection without forming a dead space in the main body 1.

In the above-described fifth embodiment, the locking portion 15 of the main body 1 is provided with a positioning function of the blunt needle 19 of the connecting tool 16, and when the connecting tool 16 is attached to the main body 1, the distal end of the blunt needle 19 is provided. 19b shows a case where a gap G is formed between the upper surface of the shaft portion 7 of the cock 6 and the gap G. However, as shown in FIG.
May abut on the upper surface of the shaft 7 of the cock 6. In this case, at least one side hole 19c communicating with the chamber portion 1a of the main body 1 and the lumens of the branch pipes 2 and 3 is provided on the distal end side wall of the blunt needle 19.

Further, the case where the locking portion 15 is provided at the lower portion of the side wall substantially orthogonal to the branch pipes 2 and 3 has been described. However, the present invention is not limited to this, and may be appropriately changed depending on the mounting position of the branch pipes 2 and 3. can do.

Further, in the above-described fifth embodiment, the case where the present invention is applied to the first embodiment has been described. However, the present invention can also be applied to the second, third and fourth embodiments. Has the same effect.

[0052]

As described above, the medical stopcock according to the present invention has a cylindrical main body having at least two branch pipes provided on the side wall, and a side injection part or co-injection fitted to one end of the main body. A rubber-like elastic body into which a needle part or the like of a part is pierced, and a handle part liquid-tightly and rotatably fitted to the other end of the main body and having one end exposed to the outside from the other end of the main body. A cock provided at the other end with a switching portion for closing or opening the flow to the lumen of the branch pipe based on the turning operation of the handle portion, and the cock is liquid-tight and attached to the other end of the main body. A cylindrical shaft portion rotatably fitted, a handle portion exposed to the outside of one end of the shaft portion from the other end of the main body to rotate the shaft portion, and provided at the other end edge of the shaft portion And is located in the chamber portion of the main body communicating with the respective lumens of the branch pipe, and based on the turning operation of the handle portion, And a switching unit for closing or opening the flow to the lumen of the branch pipe, and when the handle is rotated, the switching unit closes one of the lumens of the branch pipe, or closes both the lumens. Since it is opened, the rubber-like elastic body can reliably prevent bacteria from entering the infusion line, and a dead space is not formed in the main body, so that side injection and the like can be performed reliably.

The stopcock for medical use according to the present invention is provided with a cylindrical main body having at least two branch pipes provided on the side wall, a liquid-tight and rotatably fitted inside the main body, and a side injection part or co-injection at one end. A plurality of communicating parts which are provided with a handle part fitted with a rubber-like elastic body into which a needle part or the like of a part is pierced and exposed to the outside from one end of the main body, and having a side wall at the other end communicating with the lumen of the branch pipe; A cock having a hole and a bottomed cylindrical switching portion for closing the other end of the main body with the bottom surface and closing or opening the flow to the lumen of the branch pipe based on the turning operation of the handle portion Therefore, the rubber-like elastic body reliably prevents bacteria from entering the infusion line, and can reliably perform side injection etc. without forming a dead space in the main body, and has a cylindrical shape with a bottom. Ensure that the lumen of the branch pipe is closed by the switching unit It can be.

The stopcock for medical use according to the present invention has a bottomed cylindrical body provided with at least two branch pipes on the side wall, and is liquid-tightly and rotatably fitted in the body, and has a side at one end. A rubber-like elastic body into which a needle part or the like of the injection part or the co-injection part is pierced is fitted and a handle part exposed to the outside from one end of the main body is provided. Since it is composed of a cock provided with a switching portion for closing or opening the flow into the lumen of the branch pipe, the rubber-like elastic body reliably prevents bacteria from entering the infusion line and forms a dead space in the main body. It is possible to perform side injection without fail, and the main body is formed in a bottomed cylindrical shape.
It is possible to obtain a medical stopcock with an improved barrier property to the outside and a reduced possibility of bacterial contamination.

In the medical stopcock according to the present invention, the switching portion is constituted by a projecting portion projecting from the other end of the cock and having at least an outer wall formed in an arc shape along the peripheral wall of the chamber portion of the main body. Alternatively, the switching portion is formed at the height at which the upper end portion is in contact with or in the vicinity of the rubber-like elastic body at the peripheral edge of the other end of the cock, the outer diameter is substantially equal to the inner diameter of the main body, and the handle portion is provided on the side wall. The cylindrical portion having a plurality of communication holes communicating with the lumen of the branch pipe and the chamber portion of the main body based on the dynamic operation, or the switching portion is provided at the other peripheral portion of the cock at the upper end portion at the bottom inner surface of the main body. The outer diameter is formed to be substantially equal to the inner diameter of the main body at a height located in contact with or near the main body, and a plurality of the side walls communicate with the inner cavity of the branch pipe and the chamber part of the main body based on the turning operation of the handle part. In a cylindrical part with a communication hole Since it is configured Ri, it is possible to reliably occlusion of the lumen of the branch pipe.

In the medical stopcock according to the present invention, since a substantially vertical slit is provided substantially at the center of the rubber-like elastic body, it is possible to easily puncture the needle part or the like of the side injection part or the co-injection part. A medical stopcock that is easy to handle can be obtained.

The medical stopcock according to the present invention has a blunt needle pierced by a rubber-like elastic body and a lumen communicating with the lumen of the blunt needle on the side wall of the main body, to which a side injection part or a co-injection part is connected. Alternatively, since a locking portion for locking a connecting device provided with a connecting portion to be connected is provided, a medical stopcock having high fixability in a long side injection or co-infusion and having good operability and easy handling is provided. Obtainable.

In the medical stopcock according to the present invention, when the connecting device is locked to the locking portion of the main body, the locking portion has a function of positioning the blunt needle of the connecting device. A blunt needle can be placed at a position suitable for performing co-infusion or the like, and a medical stopcock with good operability can be obtained.

Further, in the medical stopcock according to the present invention, the connecting tool is locked to the locking portion of the main body on the tip side wall of the blunt needle of the connecting tool, and the tip of the blunt needle is positioned by the positioning function of the locking portion. When the portion abuts against the other end of the cock, the bottom inner surface of the bottomed cylindrical switching portion or the bottom inner surface of the bottomed cylindrical body, the lumen of the blunt needle communicates with the lumen of the branch pipe. Since at least one side hole is provided, one-shot side injection or the like can be performed without using the needle portion of the injection cylinder, and the rubber-like elastic body is damaged when the needle portion passes through the rubber-like elastic body. Also, bending of the needle part that occurs when the needle part is punctured and inserted, damage to the cock that occurs when the needle part contacts the cock, and fragments of the rubber-like elastic body that occurs due to damage to the rubber-like elastic body Good handling with good operability can be prevented from being transported into the patient's body. It is possible to obtain an easy-medical stopcock.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line AA of a top view, a plan view, a bottom view, and a top view of the first embodiment of the present invention.

FIG. 2 is an operation explanatory view shown in a BB cross section of the plan view of FIG. 1;

FIG. 3 is a plan view and a cross-sectional view of a connector used in the first embodiment of the present invention.

FIG. 4 is a side view showing a part of the second embodiment of the present invention in cross section and a CC cross sectional view thereof.

FIG. 5 is a side view showing a part of the operation of the second embodiment of the present invention in a cross section, and a CC cross sectional view thereof.

FIG. 6 is a side view partially showing a cross section showing another operation of the second embodiment of the present invention, and a CC cross sectional view thereof.

FIG. 7 is a longitudinal sectional view of a third embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a fourth embodiment of the present invention.

FIG. 9 is a side view, a DD sectional view, and an EE sectional view of Embodiment 5 of the present invention.

FIG. 10 is a side view showing a part of a modification of the fifth embodiment of the present invention in cross section.

FIG. 11 is a plan view and a sectional view of a conventional representative three-way stopcock.

FIG. 12 is a sectional view of another conventional three-way cock.

FIG. 13 is a sectional view and an operation explanatory view of still another conventional three-way cock.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 1a Chamber part 1b, 14 Mixed injection port 1c Fitting hole 2, 3 Branch pipe 5 Rubber-like elastic body 5a Slit 6 Cock 7 Shaft part 8 Handle part 9 Projection part 13 Cylindrical part 13a, 13b, 13c Communication hole 13d Cover part 15 Locking part 16 Connector 17e Locking claw 18 Connecting part 18a Lumen 19 Blunt needle 19a Lumen 19b Tip 19c Side hole

Claims (11)

[Claims] 1. A cylindrical main body having at least two branch pipes provided on a side wall thereof, and a rubber-like elastic member fitted to one end of the main body and punctured with a needle part or the like of a side injection part or a co-injection part. A body and a handle portion which is liquid-tightly and rotatably fitted to the other end of the main body, has a handle portion exposed at one end to the outside from the other end portion of the main body, and has a rotation portion of the handle portion at the other end. A cock provided with a switching portion for closing or opening the flow of the branch tube into the lumen based on a dynamic operation. 2. A cock having a cylindrical shaft fitted to the other end of the main body so as to be liquid-tight and rotatable, and one end of the shaft extending from the other end of the main body to the outside. A handle portion for exposing and rotating the shaft portion, and a handle portion provided at the other end edge of the shaft portion and located in a chamber portion of the main body communicating with a respective lumen of the branch pipe; A switching unit for closing or opening the flow to the lumen of the branch pipe based on a rotation operation, and when the handle unit is rotated, the switching unit is configured to switch any one of the lumens of the branch pipe. 2. The medical stopcock according to claim 1, wherein the stopcock is closed or both lumens are opened. 3. A cylindrical main body having at least two branch pipes provided on a side wall thereof, and a liquid-tight and rotatably fitted inside the main body, and a needle portion of a side injection part or a co-injection part at one end. A rubber-like elastic body to be punctured is fitted, and a handle portion is provided to the outside from one end of the main body. The other end has a plurality of communication holes communicating with the lumen of the branch pipe at a side wall. And a cock provided with a bottomed cylindrical switching unit that closes the other end of the main body with the bottom surface and closes or opens the flow to the lumen of the branch pipe based on the turning operation of the handle unit. A medical stopcock consisting of 4. A cylindrical body with a bottom provided with at least two branch pipes on a side wall, a liquid-tight and rotatably fitted inside the body, and a needle portion of a side injection part or a co-injection part at one end. A handle portion fitted with a rubber-like elastic body through which the body is punctured and exposed to the outside from one end of the main body, and the other end of the main body of the branch pipe based on a turning operation of the handle portion. A stopcock for medical use, comprising: a cock provided with a switching portion for closing or opening the flow to the cock. 5. The switching part comprises a projecting part projecting from the other end edge of the cock and having at least an outer wall formed in an arc shape so as to follow a peripheral wall of a chamber part of the main body. Item 5. A medical stopcock according to item 1, 2 or 4. 6. The switching part is formed at a height such that an upper end part thereof is in contact with or near the rubber-like elastic body at the peripheral edge of the other end of the cock and has an outer diameter substantially equal to the inner diameter of the main body. 3. The medical device according to claim 1, wherein the side wall includes a cylindrical portion having a plurality of communication holes that communicate with a lumen of the branch pipe and a chamber portion of the main body based on a rotation operation of the handle portion. Stopcock. 7. The switching portion is formed at a height such that an upper end thereof is in contact with or near a bottom inner surface of the main body at the peripheral edge of the other end of the cock and has an outer diameter substantially equal to the inner diameter of the main body,
The medical stopcock according to claim 4, wherein the side wall is formed of a cylindrical portion having a plurality of communication holes that communicate with the lumen of the branch pipe and the chamber portion of the main body based on the turning operation of the handle portion. . 8. The medical stopcock according to claim 1, wherein a substantially vertical slit is provided in a substantially central portion of the rubber-like elastic body. 9. A connection having a blunt needle pierced in the rubber-like elastic body and a lumen communicating with the lumen of the blunt needle on a side wall of the main body, and connecting or coupling a side injection part or a co-injection part. The medical stopcock according to any one of claims 1 to 8, further comprising a locking portion for locking the connecting tool having the portion. 10. The medical stopcock according to claim 9, wherein when the connecting device is locked to the locking portion of the main body, the locking portion has a function of positioning a blunt needle of the connecting device. . 11. The distal end portion of the blunt needle is locked to a stop portion of the main body on the side wall of the distal end portion of the blunt needle of the connector, and the distal end portion of the blunt needle is connected to the stop of the cock by a positioning function of the lock portion. End, at least one which communicates the lumen of the blunt needle and the lumen of the branch pipe when abutting against the bottom inner surface of the bottomed cylindrical switching portion or the bottom inner surface of the bottomed cylindrical body. The medical stopcock according to claim 10, wherein two side holes are provided.