JP3039172U - Medical infusion tube connection structure - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To connect a tapered female pipe and a male pipe to a connection structure of a medical infusion pipe used when infusing various medical fluids into a patient in a medical setting such as a hospital. The purpose of the present invention is to prevent separation of the caps, and to make it possible to temporarily hold a spare cap on the three-way stopcock itself. SOLUTION: In a medical field, a portion connecting a tube for transporting blood or a drug solution has a structure in which a male tube having an outer shape is inserted into a female tube having an inner shape,
The outside of the female tube and the tightening portion integrated with the male tube are provided with screw means for allowing the male tube to enter the female tube when they are engaged with each other and rotated in the tightening direction. .

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a connecting structure for a medical infusion tube used when infusing various medical fluids into a patient in a medical setting such as a hospital.

[0002]

[Prior art]

 6 to 9 show a conventional medical infusion tube connection structure, and FIG. 6 shows an example in which one infusion tube for infusion is connected midway and extended, where 1 is an infusion container and 2a is The infusion tube on the infusion container 1 side, 2b is the infusion tube on the injection needle 3 side, and both infusion tubes 2a and 2b are connected by a connector 4.

FIG. 7 is an enlarged sectional view of the connector 4, in which a male pipe 4a is inserted into a female pipe 4b. The external shape of the male tube 4a is tapered, and the internal shape of the female tube 4b is tapered. Then, the male tube 4a is sized to fit into the female tube 4b.

Therefore, when the male tube 4a is pushed into the female tube 4b, both the liquid transfusing tubes 2a and 2b are connected to each other so that the liquid medicine can flow.

FIG. 6 shows an example of infusion from a single infusion container 1. In the case of continuously infusing two or more infusion containers or mixing drug solutions from two or more infusion containers to infuse a patient. Therefore, a three-way stopcock as shown in FIG. 8 is known. The connection part of this three-way stopcock has the same structure as the connector 4 of FIG.

FIG. 8 is a diagram illustrating a conventional three-way stopcock, (1) is a perspective view, and (2) is a horizontal sectional view at a switching valve position. A cylindrical valve shaft 6 is rotatably inserted in a cylindrical main body 5, and from the main body 5, two female pipes 4b and 4b and one male pipe are radially arranged at 90-degree intervals. 4a are integrally formed, and the internal holes (ports) 7a, 7b, 7c of the female pipes 4b, 4b and the male pipe 4a reach the valve shaft 6.

The cylindrical valve shaft 6 is provided with three valve holes 8a, 8b and 8c at intervals of 90 degrees. In the figure, the right valve hole 8a communicates with the right port 7a, The upper valve hole 8b communicates with the upper port 7b, and the left valve hole 8c communicates with the left port 7c.

Since the upper end of the valve shaft 6 is connected to the handle 9, when the handle 9 is operated with a finger to rotate the valve shaft 6, the valve holes 8a, 8b, 8c and the ports 7a, 7b, The respective ports 7a, 7b, 7c are opened / closed depending on the positional relationship with 7c.

As the OFF character is displayed on the handle 9, since the valve hole is not open on the handle 9 side, if the handle 9 is moved to the port 7a, 7b, 7c side where the operator wants to close it. , The port on the handle 9 side is closed, and the remaining two ports are in communication.

As shown by the arrows, when the ports 7a and 7b are the inflow side and the port 7a side is the outflow side, at the handle position shown in the figure, the chemical liquids flowing in from the two directions of the ports 7a and 7b are mixed. , Will flow out from the left port 7a. On the other hand, when it is desired to allow only the chemical liquid flowing from the right port 7a to flow to the left port 7c side, the handle 9 may be rotationally moved to the upper port 7b side.

The illustrated three-way stopcock is provided at the position of the connector 4 in FIG. 6, the male tube 4a is inserted into the female tube 4b of the infusion tube 2b on the injection needle 3 side, and the female tube on the right side of the three-way stopcock is inserted. When the handle 9 is rotated to the port 7b side and the port 7b is closed while the male tube 4a of the infusion tube 2a on the infusion container 1 side of FIG. 6 is inserted in 4b, the container 1 is removed from the container 1 as in the case of FIG. The drug solution can be supplied to the injection needle 3 side.

If the male pipe 4a is also inserted into the port 7b side and connected to another drug solution container, after all the drug solution in the drug solution container 1 has been used, another drug solution can be supplied from the port 7b side. It is also possible to move the handle 9 to the position shown in the figure and mix the two kinds of drug solutions from both drug solution containers and supply them to the injection needle 3 side.

If the male pipe 4a is inserted into only one of the two ports 7a and 7b of the three-way stopcock in FIG. 8 and the male pipe 4a is not inserted into the other port, the empty port is used. The female tube 4b on the port side can be covered with a cap to be completely closed with the cap.

FIG. 9 shows a structure for attaching a cap to the female tube 4b. Projections 11 that obliquely protrude are integrally formed at an interval of 180 degrees on the back side of the flange portion 10 formed on the outer periphery of the distal end of the female tube 4b. On the other hand, the cylindrical cap 12 has two threaded threads 12a formed on the inner circumference thereof at the same angle as the inclined surface 11a of the projection 11.

Further, the tapered plug shaft 12c protruding inward from the bottom portion 12b of the cap 12 is formed in the same size as the external shape of each of the male pipes 4a. Therefore, when the plug shaft 12c is inserted into the female tube 4b and the cap 12 is rotated clockwise, the internal thread 12a is screwed into the inclined surface 11a of the projection 11 and moves forward. At this time, the stopper shaft 12c is pushed into the tapered hole inside the female tube 4b, and the female tube 4b is securely closed by the cap 12.

[0016]

[Problems to be solved by the device]

 As described above, the male pipe 4a made of hard plastic is inserted into the female pipe 4b made of hard plastic, and the pipe connection is made only by the frictional force due to the taper portion. Therefore, the male pipe 4a and the female pipe 4b are connected to each other. Separation can lead to leakage of the drug solution, which can cause unexpected agitation to the patient when viewed by the patient. In addition, the intended drug solution cannot be infused into the patient, which interferes with treatment.

In order to prevent the male tube 4a and the female tube 4b from being separated from each other, a tape such as a bandage may be wrapped around or may be fastened with a rubber band, but this is unsanitary and reliable in appearance. It is inferior in sex and gives the patient anxiety.

Further, the work of winding a tape or a rubber band is troublesome, takes time, and the work efficiency is low. If the tape or rubber band is not wrapped properly, the connection part may come off easily.

As another problem, when it is desired to close the female tube 4b of the three-way stopcock with the cap 12, it takes time to find the cap. It is unavoidable that the three-way stopcock is taken out of the packaging containing the new three-way stopcock, and the attached cap is removed from the female tube of the three-way stopcock and often used again.

The technical problem of the present invention is to pay attention to such a problem, to prevent the connecting portion between the tapered female pipe and the male pipe from being separated, and to provide a spare cap on the three-way stopcock itself. It is to be able to hold it temporarily.

[0021]

[Means for Solving the Problems]

 The technical problem of the present invention is solved by the following means. According to a first aspect of the present invention, in a medical field, a portion for connecting a tube for transporting blood or a drug solution has a structure in which a male tube having an external shape is inserted into a female tube having an internal shape, The outside of the pipe and the tightening portion integrated with the male pipe are provided with screw means for allowing the male pipe to enter the female pipe when they are engaged with each other and rotated in the tightening direction. It is a connection structure of a medical infusion tube. The screw means is sufficient if it mechanically has a tightening action on the principle of screws.

As described above, not only the male pipe is simply inserted into the female pipe but also the screw pipe is tightened in the inserting direction and locked in that state, so that there is no fear of liquid leakage, and the connecting portion is not present. There is no fear of separation. In addition, the connection operation is easy and the appearance is good.

According to a second aspect of the present invention, in a medical field, a portion for connecting a tube for transporting blood or a drug solution has a structure in which a male tube having an outer shape is inserted into a female tube having an inner shape. When the outside of the female tube and the tightening member that is rotatable with respect to the male tube are engaged with each other and the tightening member is rotated in the tightening direction, the male tube moves in the direction in which it enters the female tube. A connection structure for a medical infusion tube, characterized in that a screw means is formed. It is suitable that the tightening member is formed in, for example, a cylindrical shape, and a male tube is inserted therein.

As described above, according to the first aspect of the present invention, since the male tube is rotated relative to the female tube to tighten the screw means, it is difficult to position the female tube and the male tube in the rotational direction. However, according to claim 2, since there is a tightening member that is rotatable with respect to the male pipe, only the tightening member can be rotated to perform the tightening operation while the relative position between the female pipe and the male pipe is determined. The handling operation is simpler.

According to a third aspect of the present invention, in a medical field, a portion for connecting a tube for transporting blood or a drug solution has a structure in which a male tube having an outer shape is inserted into a female tube having an inner shape. A connection structure for a medical infusion tube, characterized in that the male tube is inserted through a ring or cylinder made of a rubber-like elastic material.

An O-ring or the like can be used as the ring, and a rubber tube or the like is suitable as the cylindrical body. If a rubber tube is sliced into rings, it becomes a ring, so if it is long, it becomes a tube, and if it is short, it becomes a ring.

As described above, since the outer circumference of the tapered male tube is covered with the rubber ring or the tube and inserted into the tapered female tube, the ring or the rubber-like elastic material is inserted. The frictional force or the adhesive force with the cylindrical body is strong, and as a result, it is possible to prevent the male tube and the female tube from being easily separated. Therefore, it is effective when the screw means that requires a rotating operation is disliked, and the connecting operation only inserts the male tube into the female tube as in the conventional case, and the handling operation is easy.

According to a fourth aspect of the present invention, a portion for connecting a tube for transporting blood or a drug solution in a medical field has a structure in which a male tube having an outer shape is inserted into a female tube having an inner shape. A connection for a medical infusion tube, characterized in that a projection is integrally provided outside the male tube, and a slit or groove into which the projection can enter is formed obliquely on the female tube. It is a structure. As described above, the structure in which the external projection of the male pipe is fitted into the slit or groove formed in the cylindrical portion of the female pipe and rotated is a kind of screw means.

As described above, since a kind of screw means is used, it is possible to prevent the female tube and the male tube from being easily separated in this case as well. Moreover, since the external projection of the male tube is fitted into the slit or groove of the female tube, the fitting operation can be performed while visually confirming from the outside, the handling is simple, and the relative position in the rotating direction between the female tube and the male tube is also the slit. Alternatively, the groove is preset.

According to a fifth aspect of the present invention, the main body portion in which the rotary shaft with the valve function is inserted and supported has a plurality of ports opened and closed by the rotation of the rotary shaft, and these ports have a tapered inner shape. It consists of a female tube and a male tube with a taper outer shape so that it can be inserted into the female tube.

An external projection having an angle having a screw function is provided on the outside of the female tube, and a cap put on the tip of the female tube is engaged with the projection and rotated in the tightening direction. Then, a screw means is formed so that the tapered stopper shaft in the center of the cap is inserted into the female tube. Moreover, the main body portion is provided with a holder portion having a projection similar to the outside of the female tube, so that the cap can be screwed and supported.

As described above, the main body such as the three-way stopcock has the holder portion capable of screwing and supporting the cap with the screw function. Therefore, if the unused cap is mounted and supported on the holder portion, The cap can be immediately removed and used as needed, and it is not necessary to search for the cap as in the conventional case, and the work efficiency is improved.

[0033]

[Embodiment of the invention]

 Next, how the connection structure of the medical infusion tube according to the present invention is actually embodied will be described. FIG. 1 is a view showing a first embodiment of a connection structure for a medical infusion tube according to the present invention, (1) is a plan view of a female tube 4b, and (2) is a plan view of a male tube 4a. The structure is the same as that of the three-way stopcock female tube 4b in FIG. 9 in that protrusions 11 are formed at 180 ° intervals on the outer circumference of the tip of the female tube 4b.

In the male pipe 4a, a cylinder 13 which is substantially similar to the cap 12 of FIG. 9 is fixed or integrally molded so as to surround the male pipe 4a. On the inner circumference of the cylinder 13, two threads 13a similar to the two threads 12a of the cap 12 are formed. However, the double thread 13a is formed not only on the entire inner circumference of the cylinder 13 but only on the necessary minimum length, that is, only on the inner region of the cylinder 13.

The female tube 4b can be inserted into the cylinder 13, and the protrusion 11 with the inclined surface 11a and the female thread 13a can be screwed together. Therefore, when the male tube 4a is fully inserted into the female tube 4b and the male tube 4a is rotated clockwise with respect to the female tube 4b, the two internal thread 13a inside the cylinder 13 causes the inclined surface 11a of the projection 13 to be inclined. Acts to get over. As a result, the male tube 4a is firmly pushed into the female tube 4b and locked in that state by the screw tightening action.

When the female thread 13a is formed inside the cylinder 13, the projection 11 of the female tube 4b does not necessarily have to have the inclined surface 11a, and it may have a cylindrical shape as shown in FIG. Only the protrusion 11b is sufficient. This is because the spiral inclined portion of the female thread 13a has a screw tightening action.

When the external projection 11 of the female tube 4b is provided with the inclined surface 11a, the female screw thread 13a on the inner peripheral surface of the cylinder 13 is omitted, and a cylindrical projection protruding inward as shown in FIG. Even if 13b is provided, the screw tightening action occurs.

The two threads 13a may be formed on the entire inner surface of the cylinder 13 as in the case of the cap 12 of FIG. 9, but only the inner part of the cylinder 13 is formed as shown in FIG. Then, the rotation amount at the time of screwing operation between the female pipe 4b and the male pipe 4a can be small.

In FIG. 1, the cylinder 13 and the male pipe 4a are integrally rotated and screwed, but in the embodiment of FIG. 2, it is not necessary to rotate the male pipe 4a. 2A is a plan view of the female tube 4b, and FIG. 2B is a horizontal sectional view of the male tube 4a side.

The inner wall 13c of the cylinder 13a in this embodiment is fitted in a circumferential groove on the outer circumference of the male pipe 4a and can rotate with respect to the male pipe 4a, but is blocked by the flange 14. Therefore, it cannot move to the male pipe 4a side.

Therefore, when only the cylinder 13b is rotated to the right with the male tube 4a inserted in the female tube 4b, the male tube 4a is pushed into the female tube 4b via the flange 14 and firmly joined. . Although the two threaded threads 13a are formed on the entire inner circumference of the cylinder 13, they may be formed only on the inner part of the cylinder 13b as in the case of FIG. 1 (2).

FIG. 3 shows a third embodiment of the present invention, which does not require a rotating operation. In both FIGS. (1) and (2), the female tube 4b is exactly the same as the conventional female tube, and only the inside is tapered. On the other hand, the male tube 4a is covered with a rubber cylinder 15 in FIG. 1A, and an O-ring 16 is wound in FIG. 2B.

In FIG. 1 (1), a cylinder 15 is a kind of insect rubber used in a portion of a bicycle tube for injecting air, and is covered in advance on the tapered outer periphery of the male pipe 4a, and then the female pipe 4b. Insert it inside and press firmly to get the state shown. Since the cylinder 15 is made of rubber, it is compressed by the force of pushing the male tube 4a into the female tube 4b, the airtightness is improved by the elasticity, and liquid leakage can be reliably prevented.

Further, rubber or rubber-like synthetic resin is rich in elasticity and has a large frictional force with the rigid female pipe 4b and the male pipe 4a, so that it is difficult to slip and, as a result, the female pipe 4b and the male pipe 4a. It can be easily separated from 4a and prevented from coming off.

If a flange-shaped portion 17 is formed at a position on the outer circumference of the male pipe 4a that does not fit into the female pipe 4b, and the rubber cylinder 15 is covered up to the flange-shaped portion 17, the cylinder 15 becomes male. It is possible to prevent the pipe 4a from easily falling off.

In the figure, the length L1 of the cylinder 15 is long, but it is sufficient if the rubber cylinder 15 is interposed between the female pipe 4b and the male pipe 4a. The length within the range where the pipe 4a overlaps is sufficient. Alternatively, the rubber cylinder 15 may be sliced into a ring-shaped cylinder that is sufficiently shorter than the length L2.

(2) In FIG. 2, a groove in the circumferential direction is formed on the outer circumference of the male pipe 4a, and an O-ring 16 made of rubber or soft synthetic resin is fitted therein. Also in this case, the O-ring 16 is strong enough to be compressed, and when the male pipe 4a is pushed into the female pipe 4b, the elasticity of the O-ring 16 ensures the airtightness and the detachment can be prevented.

The ring formed by cutting the rubber cylinder 15 into a ring is also formed by forming a groove on the outer circumference of the male pipe 4a as shown in FIG. Can be prevented.

FIG. 4 shows a fourth embodiment of the present invention, and in principle, the screwing function of FIGS. 1 and 2 is applied. At the tip of the female tube 4b, inlet-shaped slits 18 are formed obliquely at intervals of 180 degrees. On the other hand, on the outside of the male pipe 4a, columnar projections 19 are formed at 180 intervals.

Therefore, when the male pipe 4a is inserted into the female pipe 4b, and then the protrusion 19 is inserted into the inclined slit 18 and rotated rightward, the protrusion 19 moves in the direction over the inclined surface of the inclined slit 18. Moving. Due to the screw tightening action at this time, a force in the direction in which the male pipe 4a is pushed into the female pipe 4b via the protrusion 19 is generated.

A structure in which a sleeve is covered on the outside of the inclined slit 18 at the tip of the female tube 4b, that is, a structure in which a groove into which the projection 19 is inserted is formed in the inner periphery of the tip of the female tube 4b in place of the slit 18 Works the same way.

FIG. 5 shows an embodiment in which the holder portion of the cap 12 is provided on the three-way stopcock. In the main body 5 of the three-way stopcock, two female tubes 4b and 4b and one male tube 4a are formed at intervals of 90 degrees. Therefore, since the back portion of the port 7b is vacant, the present invention integrally forms the cap holder portion 20 in this vacant region, for example.

The holder portion 20 is formed with a projection 11 having an inclination similar to that of the female tube 4b so that the holder portion 20 can be screwed into the female thread 12a of the cap 12. Therefore, the blind female tube 4b having no port 7 is shortened and provided integrally with the main body 5.

As a result, when the unused cap 12 is put on the holder portion 20 and rotated clockwise, the cap 12 is attached to the holder portion 20 by the screw tightening action of the female thread 12a of the cap and the inclined projection 11. Retained.

When the screw fastening structure for the female pipe 4b and the male pipe 4a has a slit or groove structure as shown in FIG. 4, the holder portion 20 also forms a slit similar to the diagonal slit 18 of FIG. This can be realized by integrally providing a protrusion similar to the columnar protrusion 19 on the stopper shaft 12c of the cap 12.

[0056]

[Effect of the invention]

 According to claim 1, not only the male pipe is simply inserted into the female pipe, but also it is tightened in the inserting direction by the screw means and fixed in that state, so that there is no risk of liquid leakage, and at the connecting portion. There is no fear of separation. In addition, the connection operation is easy and the appearance is good.

According to the second aspect of the present invention, since the male tube has the tightening member rotatable, the tightening operation is performed by rotating only the tightening member with the relative position between the female tube and the male tube being determined. Therefore, the handling operation is simpler.

According to the third aspect, since the outer circumference of the tapered male tube is covered with the rubber ring-less tube and inserted into the tapered female tube, it is made of a rubber-like elastic material. The frictional force or adhesive force between the ring and the cylindrical body is strong, and as a result, the male tube and the male tube can be prevented from being easily separated. Therefore, it is effective when the screw means that requires a rotating operation is disliked, and the connecting operation only inserts the male tube into the female tube as in the conventional case, and the handling operation is easy.

According to the fourth aspect, since a kind of screw means is used, it is possible to prevent the female tube and the male tube from being easily separated also in this case. Moreover, since the external projection of the male pipe is fitted into the slit or groove of the female pipe, the fitting operation can be performed while visually confirming from the outside, the handling is simple, and the relative position in the rotation direction between the female pipe and the male pipe is also Preset by slit or groove.

According to the fifth aspect of the present invention, the main body such as the three-way stopcock has the holder part capable of screwing and supporting the cap having the screw function. Therefore, the unused cap can be mounted and supported on the holder part. If this is done, the cap can be immediately removed and used as needed, and there is no need to search for the cap as in the past, and work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of a connection structure of a medical infusion tube according to the present invention.

FIG. 2 is a view showing a second embodiment of the connection structure of the medical infusion tube according to the present invention.

FIG. 3 is a sectional view showing a third embodiment of the connection structure of the medical infusion tube according to the present invention.

FIG. 4 is a sectional view showing a fourth embodiment of the connection structure of the medical infusion tube according to the present invention.

FIG. 5 is a perspective view and a sectional view of an embodiment in which a cap holder portion is provided on a three-way stopcock.

FIG. 6 is a diagram showing an example in which an infusion tube is connected midway and extended.

FIG. 7 is an enlarged cross-sectional view of a conventional connector.

FIG. 8 is a diagram illustrating a conventional three-way stopcock, (1) is a perspective view, and (2) is a horizontal sectional view at a switching valve position.

FIG. 9 is a view showing a cap support structure for a female tube of a three-way stopcock.

[Explanation of symbols]

 4 Connector 4a Male pipe 4b Female pipe 5 Main part of 3-way stopcock 6 Valve shaft 7a, 7b, 7c Internal hole (port) 8a, 8b, 8c Valve hole 9 Handle 11 Protrusion 12 Cap 12a Female thread 12c Plug shaft 13 Cylindrical 13a Female thread 14 Flange 15 Rubber cylinder 16 O-ring 18 Inclined slit 19 Protrusion 20 Cap holder part

Claims (5)

[Utility model registration claims] 1. A structure for inserting a male tube having a tapered outer shape into a female tube having a tapered inner shape at a portion connecting a tube for transporting blood or a drug solution in a medical field. The outer portion of the pipe and the tightening portion integrated with the male pipe are provided with screw means for allowing the male pipe to enter the female pipe when engaged and rotated in the tightening direction. Characteristic medical infusion tube connection structure. 2. A structure for inserting a male tube having an outer shape into a female tube having an inner shape at a portion for connecting a tube for transporting blood or a drug solution in a medical field, The outside of the pipe and the tightening member rotatable with respect to the male pipe are formed with screw means in a direction in which the male pipe enters the female pipe when engaged with each other and rotating the tightening member in the tightening direction. The connection structure of a medical infusion tube characterized by being. 3. A structure in which a male tube having an outer shape is inserted into a female tube having an inner shape at a portion for connecting a tube for transporting blood or a drug solution in a medical field, and has a rubber-like elasticity. A connecting structure for a medical infusion tube, characterized in that the male tube is inserted through a ring or cylindrical body made of a material. 4. A structure for inserting a male tube having a tapered outer shape into a female tube having a tapered inner shape at a portion for connecting a tube for transporting blood or a drug solution in a medical field. A protrusion is integrally provided on the outside of the pipe,
A connection structure for a medical infusion tube, wherein a slit or groove through which the projection can enter is formed obliquely in the female tube. 5. A main body portion in which a rotary shaft with a valve function is inserted and supported has a plurality of ports that are opened and closed by rotation of the rotary shaft, and these ports have a tapered internal shape. And a male tube having a tapered outer shape so that the female tube can be inserted into the female tube. The female tube has a projection with an angle having a screw function on the outside of the female tube. The cap fitted on the tip is formed with screw means for allowing the tapered stopper shaft at the center of the cap to enter the female tube when engaged with the protrusion and rotated in the tightening direction. Is provided with a holder part having a projection similar to the outside of the female tube, and the cap can be screwed and supported, and the connecting structure of the medical infusion tube.