JP2005296134A - Mixed injection port - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mixed injection port with an insertion part which is a part where an insertion body is inserted and is easily sterilized. <P>SOLUTION: The mixed injection port has a valve plug 72, which is closed when external force is not acted and is elastically deformed and is opened by inserting a medical infusion/extraction tube, at an opening part of a port. A valve seat 75 of the valve which increases force for tightly holding the tube as the tube is inserted deeper is provided in the periphery of a place planned for inserting the tube beyond the outer surface of the valve plug 72 in the direction of inserting the tube. The outer surface of the valve plug 72 is revealed more largely than the maximum outer circumference of the tube. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a medical device that is installed in an infusion line in order to easily and reliably perform operation when liquid is mixedly injected from the outside of the liquid supply path or when liquid is collected from the inside of the liquid supply path. The present invention relates to a mixed injection port or a port attached to a medical container.

When a patient is transfused or transfused, in order to mix different types of medicinal liquids or to collect a sample of the liquid flowing in the liquid feeding path, a side injection line may be provided in the main liquid feeding path.
As an instrument for forming such a side injection line, as shown in FIG. 8, for example, a state where the needle is not attached to the syringe, that is, a mixed injection port that can be directly connected to the syringe with the luer portion exposed at the tip 1000 (for example, Patent Document 1).

Details of the conventional mixed injection port will be described below.
As shown in FIG. 8 and FIG. 9A, the conventional mixed injection port 1000 shields the port body 1001 having a T-shaped channel cross-section and the branch path forming a part of the T-shaped path. The disk-shaped valve body 1002 and a cover body 1003 for mounting the valve body 1002 on the port body 1001 are configured.

The port main body 1001 has a circular tube shape as a whole, and both ends thereof are connected to, for example, a piping tube (not shown) of a blood flow path, and the blood circulates in the tube.
In order to hold the valve body 1002 and the cover body 1003 on a part of the pipe wall of the port main body 1001, the surface is partially flat, and the branch path is formed at the center of the flat part.
The valve body 1002 has a disk shape made of a rubber-like elastic body as a whole, and a slit 1002a is formed at the center thereof as shown in FIG. 9C so that a thin tube can be inserted from the outside.

The cover body 1003 covers the upper surface outer peripheral portion of the valve body 1002 and presses it against the flat portion.
In the mixed injection port having such a configuration, for example, as shown in FIG. 9B, when nothing is inserted in the slit 1002a, the slit 1002a is closed, but shown in FIG. 9D. Thus, for example, when the insert 2000 (in the figure, the lure part of the syringe) is inserted, the vicinity of the slit 1002a of the valve body 1002 is inserted as shown in FIG. The front end of the lure portion is bent in a state where the peripheral edge (A portion) of the opening portion of the cover body 1003 and the vicinity of the base of the insertion body 2000 having a truncated cone shape are circumferentially bent along the outer peripheral surface of the body. Insertion is stopped by abutting against a rib 1001a provided on the bottom surface of the channel 1001, and the slit 1002a is opened while maintaining an airtight state.

As described above, the diameter d1 of the opening of the cover body 1003 is larger than the diameter of the tip of the insertion body 2000 so that the opening of the cover body 1003 functions as a stopper for stopping the insertion. It is set smaller than the diameter.
By the way, normally, when inserting an insertion body into the slit 1002a, as shown to Fig.9 (a), it disinfects by wiping off the exposed part of the valve body 1002 beforehand with alcoholic cotton.

As a result, it is possible to prevent contamination of bacteria that accompanies insertion of the insert into the slit 1002a.
Japanese Patent Laid-Open No. 11-197254

By the way, in the medical field, medical workers such as doctors and nurses are required to handle medical devices accurately and quickly, and medical devices have been improved to realize this request. .
In particular, a mixed injection port is required to be able to quickly insert and remove an insert such as a syringe.

When inserting the insert into the co-infusion port, the insertion hole must be cleaned with alcoholic cotton.
Usually, this cleaning time is short enough not to cause a problem, but there is a demand for further reduction of the cleaning time in order to improve work efficiency in the medical field.
The present invention has been made to meet the above demands, and an object of the present invention is to provide a co-infusion port capable of shortening the cleaning time of an insertion hole as an insertion destination of an insert.

  In order to achieve the above object, the co-infusion port according to the present invention is closed in a state where no external force is applied, and a valve body that is elastically deformed and opened by insertion of a medical infusion / pour-out tube is provided. A co-injection port provided at the mouth of the port, wherein the tube is sandwiched as the insertion becomes deeper around the planned insertion position of the tube in the tube insertion direction ahead of the outer surface of the valve body. The holding means for increasing the force to be applied is provided, and the outer surface of the valve body is exposed to be larger than the maximum outer circumference of the pipe.

  The mixed injection port according to the present invention is closed in a state where no external force is applied, and has a valve body that is elastically deformed and opened by insertion of a medical injection / extraction tube at the mouth of the port. A holding means for increasing a force for holding the pipe as the insertion is deeper is provided in the port and in the pipe insertion direction ahead of the outer surface of the valve body and around the planned insertion position of the pipe. The outer surface of the valve body is exposed to be larger than the maximum outer circumference of the pipe.

As a result, the clamping means that has been conventionally positioned on the front side in the insertion direction with respect to the outer surface of the valve body is positioned further in the tube insertion direction than the outer surface of the valve body, and the outer surface of the valve body is more exposed. In addition, as the tube is inserted, the clamping force increases, so that the tube can be held firmly.
By greatly exposing the outer surface of the valve body, the cleaning workability of the insertion port is improved, and the cleaning time can be shortened.

Further, the outer diameter of the tube is narrowed toward the tip, and the clamping means is provided with a through hole through which the tube is inserted, and the surface of the tube is directly or indirectly at the periphery of the through hole. It is preferable that the valve seat supports the valve body by contact with each other.
Thereby, the clamping force of the said pipe | tube can be increased with insertion, without requiring a complicated structure.

Moreover, it is good also as having the surface change part from which the surface shape is changing so that it can see visually in the vicinity of the said mouth part in the exposed surface side of the said valve body, or marking.
Thereby, the position of the mouth becomes clear.
The surface changing portion may be disposed in the vicinity of the mouth portion on the exposed surface side of the valve body, and the surface changing portion may have a step of 0.1 mm or more and 0.3 mm or less. .

Since the value of the step is a value that achieves both wiping and discriminating properties, the mouth portion can be easily wiped and its position can be easily recognized.
The medical co-injection port includes a cover portion that covers the upper peripheral edge of the valve body and is provided with a second opening that exposes the mouth, and the size of the opening is the size of the through hole. It may be larger than this.

Thereby, since the said mouth part and its vicinity will be exposed largely, it will become easier to wipe off with sake cotton etc., and a cleaning operation can be completed in a short time.
The first opening and the second opening may be circular holes having first and second inner diameters, respectively, and the second inner diameter may be larger than the first inner diameter. .
Thereby, since the said mouth part and its vicinity are exposed largely similarly to the above, it becomes easier to wipe off with refined cotton etc., and a cleaning operation can be completed in a short time.

(First embodiment)
(Constitution)
FIG. 1 is an external view of a mixed injection port in the first embodiment.
The co-injection port 70 is a medical instrument for providing a side injection line in the main liquid feeding path, and has a configuration capable of easily disinfecting an insertion part into which an insertion body such as a luer part of a syringe is inserted.

Details of the mixed injection port 70 in the first embodiment will be described below.
As shown in FIG. 1 and FIG. 2A, the mixed injection port 70 is a disk body that shields a port body 71 having a T-shaped channel cross-section and a branch path forming a part of the T-shaped path. The valve body 72 and a cover body 73 that supports the valve body 72 and is attached to the port body 71 are configured.
The port body 71 has a circular tube shape as a whole, and both ends thereof are connected to, for example, a piping tube (not shown) of a blood flow path, and the blood circulates in the tube.

In order to hold the valve body 72 and the cover body 73 on the central tube wall of the port main body 71, the surface is partially flat, and the branch path is formed at the center of the flat portion.
A preferable material for the port body 71 includes polycarbonate that is excellent in transparency and adhesion to the tube.
The valve body 72 is a disc shape made entirely of a rubber-like elastic body (for example, isoprene rubber), and a slit 72a is formed at the center thereof so that a thin tube can be inserted from the outside as shown in FIG. Is formed.

The slit 72a may be a single straight line, or may have a shape in which a straight line extends radially in three directions from the center.
Further, a ring-shaped marking 72b surrounding the slit 72a is printed around the slit 72a, and the purpose thereof is to clarify the position of the slit 72a that is difficult to see to the operator.

The cover body 73 includes a cover main body 74 that covers the outer peripheral portion of the upper surface of the valve body 72 and presses it against the flat portion, and a valve seat 75 as an example of a clamping means that supports the valve body 72 from the inside.
The cover main body 74 has a bottomed cylindrical shape having an opening, and is integrally formed of a material suitable for holding the valve body 72 (for example, polyacetal or polypropylene).
The port body 71 and the cover body 73 may be joined by providing a pair of recesses and claw portions on one of them and engaging them, or simply bonding them together, You may screw with a screw.

The cover body 73 may be adhered to the port main body 71, or at least one of the fitting portions may be hooked with a claw to increase the fitting strength.
In the mixed injection port having such a configuration, for example, as shown in FIG. 2B, when an insert such as a luer part of a syringe is not inserted into the slit 72a, the slit 72a is closed. As shown in FIG. 3B, for example, when a truncated cone-shaped insert 2000 (in the figure, a luer part of a syringe) is inserted, the vicinity of the slit 72a of the valve body 72 is As shown in FIG. 3 (c), the insertion body bends inward along the outer peripheral surface of the insert body without any gap, and the base portion of the insert body 2000 abuts indirectly and the insertion becomes deeper as the insertion becomes deeper. The movement in the direction perpendicular to the insertion direction is restricted.

And insertion is stopped when the front-end | tip of an insertion body contact | abuts to the rib 71a.
At this time, the airtight state is maintained.
The diameter d4 of the opening of the valve seat 75 is set as follows so that when the distal end of the insert comes into contact with the rib 71a, the insert can be clamped to such an extent that it cannot be easily removed.
That is, as shown in FIG. 3 (b), the truncated cone-shaped insert (syringe luer part) and the valve seat 75 indirectly contact each other with a part of the valve body 72 sandwiched between them. When it is assumed that the distal end of the body and the inner wall surface of the port main body 71 are kept at a fixed distance L0, the diameter of the insertion body at the position closest to the peripheral edge of the opening of the valve seat 75 at this time is d0. When the thickness t1 of the sandwiched valve body 72 is the final thickness t1 ′, the diameter d4 of the opening of the valve seat 75 is determined so that d4 = t1 ′ × 2 + d0.

In the first embodiment, assuming that the value of t1 is set to 2 mm, for example, the value of t1 ′ at this time is about 0.5 mm.
In this way, the function of sandwiching the insert is not added to the cover body 74 located outside the valve body, but is added to the valve seat 75 located inside the valve body. The value of the diameter d3 of the opening in the cover main body 74 that has been limited by the diameter of the insert until then can be freely set.

That is, in the first embodiment, the relationship is d3> d4, and for example, d3 = 8 mm and d4 = 5 mm.
In addition, the diameter d6 of the space under the valve seat is set to be at least larger than d4, and is large enough to secure the escape destination of the portion of the valve body 72 protruding downward from the valve seat 75, For example, d6 = 7 mm is set.

As described above, the mixed injection port 70 described in the first embodiment plays a role of sandwiching the insert body between the valve body 72 and the valve seat 75 located inside the mixed injection port. As compared with the above, the opening of the cover main body 74 can be enlarged.
Therefore, prior to inserting the insertion body such as the luer part of the syringe into the slit 72a, as shown in FIG. 2 (a), the exposed part of the valve body 72 is wiped with alcohol fine cotton or the like in advance. In this case, the workability is improved and the cleaning time can be shortened.

The mixed injection port 70 described in the first embodiment has a cover body 74 that covers and presses the outer peripheral portion of the upper surface of the valve body 72, as shown in FIG. It is not always necessary to cover and press the outer peripheral portion of the upper surface of the valve body 72.
In that case, it is necessary to fix the valve body 72 by a new method. For example, as shown in FIG.

Even if it fixes by adhesion | attachment in this way, as shown in FIG.4 (c), the insertion condition of the insertion body 2000 does not change.
As a fixing method other than the bonding of the valve body, as shown in FIG. 4D, the valve body 92 is provided with a slit 92a at the center and a groove 92b in the circumferential direction at the center in the thickness direction. May be fixed by fitting the groove 92b and the convex portion provided on the inner peripheral surface of the cover main body 80. In this case, when the insert 2000 is inserted, FIG. As shown in e), the valve element 92 is bent.

In the mixed injection port 70 described in the first embodiment, the marking 72b is ring-shaped, but may have other shapes, for example, a square shape or a cross shape. It may have discriminating power by changing the color of the inside and outside of the shape and other shapes.
(Second Embodiment)
Hereinafter, the mixed injection port in the second embodiment will be described.

FIGS. 5A to 5C and FIGS. 6A to 6C are diagrams for explaining the mixed injection port in the second embodiment.
Similar to the mixed injection port 70 in the first embodiment, the mixed injection port 100 is a medical instrument for providing a side injection line in the main liquid feeding path, such as an insertion body 2000 (the lure portion of a syringe in the figure). It has a configuration that can easily sterilize an insertion portion as an insertion destination of an insertion body.

As shown in FIG. 5A, the mixed injection port 100 includes a port main body 101 having a T-shaped channel cross-sectional shape, and a disk-shaped valve body that shields a branch path forming a part of the T-shaped channel. 102, a cover body 103 that supports the valve body 102 and is attached to the port body 101.
The difference between the mixed injection port 100 in the second embodiment and the mixed injection port 70 in the first embodiment is that the shape of the outer surface of the valve is partly different. Since it is the same shape as the mixed injection port 70 in the embodiment, detailed description thereof will be omitted.

Hereinafter, the valve body 102 will be described in detail.
The valve body 102 has a disk shape entirely made of a rubber-like elastic body (for example, isoprene rubber), and a slit 102a as shown in FIG. 5C is provided at the center so that a thin tube can be inserted from outside. Is formed.
Further, a thin portion 102b having a thickness t4 within the range of a circle having a diameter d9 passing through both ends of the slit and a thickness outside the range of the circle is increased by L1 from t4. The purpose is to clarify to the operator the position of the slit 102a that is not easily noticeable by the boundary between the thin portion 102b and the thick portion 102c, that is, the level difference. .

More specifically, the value of L1 is not less than 0.1 mm and not more than 0.3 mm (preferably 0.2 mm).
The lower limit value of L1 is a value that can ensure the lowest visibility in a range in which a person can recognize the circle, and differs depending on the color of the valve body 102. When the color 102 was a natural color (opaque milky white), the above values were obtained.

Further, the upper limit value of L1 is a value determined in consideration of wiping performance, and the wiping workability is improved and the cleaning time is shortened as the value is reduced.
Here, by making the value of t4 substantially the same as the thickness t1 of the valve body 72 in the first embodiment, the value of the opening diameter d10 of the valve seat 105 is substantially the same as the value of the opening diameter d4 of the valve seat 75. The same can be set.

As in the mixed injection port 70 in the first embodiment, the insertion of the insert is stopped when the tip of the insert comes into contact with the rib 101a as shown in FIGS. 6 (a) and 6 (b).
At this time, as shown in FIG. 6C, the valve body 102 is bent inward along the outer peripheral surface of the insertion body without a gap.
With the above configuration, the marking that is printed on the valve body in the first embodiment is not necessary, and the printing cost does not occur and the manufacturing cost can be reduced.

When the mixed injection port 70 in the first embodiment is used for a long period of time, the surface of the valve body 102 may be worn with use, and the marking may be faded or disappear. However, in the second embodiment, Since the step is provided instead of printing, the step having the discriminating power does not disappear due to wear in normal use.
Of course, the mixed injection port 100 of the second embodiment plays a role of sandwiching the insert body between the valve body 102 and the valve seat 105 located inside the mixed injection port, similarly to the mixed injection port 70 of the first embodiment. Therefore, the opening of the cover main body 104 can be made larger than the conventional mixed injection port.

Thereby, when disinfecting by wiping the exposed part of the valve body 102 with alcoholic cotton etc., workability | operativity improves and the cleaning time can be shortened.
In the second embodiment, the portion where the slit is formed in the valve body 102 is the thin wall portion 102b, but the slit 122a is formed in the valve body 122 as shown in FIG. The existence of the slit 122a may be emphasized by using the thickened portion 122b as a thick portion.

  The present invention can be applied to manufacture of a medical co-infusion port used in a medical field.

It is an external view of the mixed injection port in 1st Embodiment. It is sectional drawing of the mixed injection port in the 1st embodiment. It is a cross-sectional perspective view of the mixed injection port in the first embodiment. It is a figure which shows an example of a structure in case there is no cover main body in the 1st embodiment. It is a figure explaining the mixed injection port in 2nd Embodiment. It is a cross-sectional perspective view of the co-injection port in the second embodiment. It is a figure which shows the modification of the structure which emphasizes presence of a slit. It is an external view of the conventional mixed injection port. It is sectional drawing of the conventional mixed injection port.

Explanation of symbols

70 Mixed injection port 71 Port body 71a Rib 72 Valve body 72a Slit 72b Marking 73 Cover body 74 Cover body 75 Valve seat 80 Cover body 92 Valve body 92a Slit 100 Mixed injection port 101 Port body 101a Rib 102 Valve body 102a Slit 102b Thin part 103 Cover Body 104 Cover body 105 Valve seat 122 Valve body 122a Slit 122b Thick part

Claims (6)

It is a mixed injection port having a valve body that is closed in a state where no external force is applied, and has a valve body that is elastically deformed and opened by insertion of a medical injecting / extracting pipe at the mouth of the port,
There is provided a clamping means for increasing the force to clamp the tube as the insertion is deeper, around the planned insertion position of the tube, in the tube insertion direction ahead of the outer surface of the valve body,
The medical co-infusion port, wherein the outer surface of the valve body is exposed to be larger than the maximum outer circumference of the tube. The outer diameter of the tube is thinner toward the tip,
The clamping means is a valve seat that is provided with a through-hole through which the pipe is inserted, and that supports the valve body by directly or indirectly contacting the periphery of the through-hole with the surface of the pipe. The medical mixed injection port according to claim 1, wherein   2. A surface changing portion whose surface shape is changing so as to be visible or a marking is provided in the vicinity of the mouth portion on the exposed surface side of the valve body. Or the medical mixed injection port of 2. In the vicinity of the mouth portion on the exposed surface side of the valve body, the surface changing portion is disposed,
The medical co-infusion port according to claim 3, wherein the surface changing portion has a step of 0.1 mm or more and 0.3 mm or less. The medical mixed injection port is
Covering the upper peripheral edge of the valve body, provided with a cover portion provided with an opening through which the mouth portion is exposed,
The medical co-infusion port according to claim 2, wherein the size of the opening is larger than the size of the through hole. The first opening and the second opening are circular holes having first and second inner diameters, respectively.
The medical co-infusion port according to claim 5, wherein the second inner diameter is larger than the first inner diameter.

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