JP6402881B2 - Double female connector - Google Patents

Description

  The present invention relates to a double female connector provided with an insertion portion into which a male luer is inserted at both ends. In particular, the present invention relates to a double female connector used to connect the male connectors at the ends of two tubes used in enteral nutrition therapy and the like.

  Enteral nutrition therapy is known as a method for administering nutrition and drugs to patients without oral administration. In enteral nutrition therapy, a nutrient or liquid food is passed through a nasal catheter inserted from the patient's nasal cavity to the stomach or duodenum or a PEG (Percutaneous Endoscopic Gastrostomy) catheter inserted into the gastric fistula formed in the patient's abdomen. Or a liquid such as a drug (commonly referred to as “enteral nutrition”) is administered to the patient. A liquid substance to be administered to a patient is stored in a container. A nutrition set comprising a flexible tube is connected to the outlet port of the container. The downstream end of the nutrition set is connected to the upstream end of a nasal catheter or PEG catheter (hereinafter collectively referred to as “catheter”) inserted into the patient. Generally, a male connector is provided at the downstream end of the nutrition set. On the other hand, a female connector that can be connected to the male connector is provided at the upstream end of the catheter. As male connectors and female connectors, connectors of various shapes are actually used (see, for example, Patent Document 1).

  By the way, if the liquid substance administered in enteral nutrition therapy is a low-viscosity liquid, the liquid substance may flow back from the stomach to the esophagus, causing pneumonia, or the liquid water may not be sufficiently absorbed by the body. There are problems such as diarrhea. Therefore, in enteral nutrition therapy, the liquid material is often made highly viscous (ie, semi-solid) by adding a thromi agent or a thickener. Such a high-viscosity liquid material has low fluidity, and therefore has high resistance when passing through the tube. Therefore, when a liquid substance is administered to a patient, the liquid substance is fed under pressure.

  Therefore, it is desirable that the connector that connects the nutrition set and the catheter includes a locking mechanism that engages with each other so that it can withstand the pressure applied to the liquid. Then, it is examined that the male connector and the female connector used for such an application are internationally standardized as an international standard ISO80369-3 regarding a nutritional medical device. As shown in FIGS. 5A and 5B, the male connector 901 considered as ISO 80369-3 has a female screw 916 surrounding a cylindrical male luer 910. On the other hand, as shown in FIGS. 6A and 6B, a female connector 902 considered as ISO 80369-3 has a male screw 926 on the outer peripheral surface of a cylindrical insertion portion (male luer) 920 into which a male luer 910 is inserted. Male connector 901 and female connector 902 are connected by inserting male luer 910 into insertion portion 920 and screwing female screw 916 and male screw 926 together. The male connector 901 and the female connector 902 are liquid-tight (property that the liquid does not leak out from the connecting portion between the male connector and the female connector even when pressure is applied to the liquid) and the connection strength (the connected male connector and Provides excellent connection with the female connector that does not separate even when a tensile force is applied.

  If such a male connector 901 and a female connector 902 are adopted as international standards, a nutrition set in which the female connector 902 is provided at the downstream end and a catheter in which the male connector 901 is provided at the upstream end are put into practical use. There is a high possibility.

International Publication No. 2008/152871 Pamphlet

  In an actual medical field, a syringe may be used to pump a liquid material. In this case, the liquid substance to be administered to the patient is stored in a syringe, the male luer (mouth) of the syringe is connected to the upstream end of the catheter, and the liquid substance is pressurized and injected into the patient. Therefore, it is desired to connect a male luer of a syringe and a catheter provided with a male connector based on ISO 80369-3 at the upstream end.

  An object of this invention is to provide the double female connector which can connect the male luer of a syringe and the male connector based on ISO80369-3.

The double female connector of the present invention includes a first insertion portion into which a first male luer is inserted at one end and a second insertion portion into which a second male luer is inserted at the other end. The first insertion portion and the second insertion portion communicate with each other. The first male luer is made of a hard material, and its outer peripheral surface is a male tapered surface whose outer diameter decreases as it approaches the tip of the first male luer. The inner peripheral surface of the first insertion portion is a first tapered surface whose inner diameter increases as it approaches the tip. The shape of the first tapered surface coincides with the shape of the male tapered surface of the first male luer so as to be in close contact with the male tapered surface of the first male luer. The inner peripheral surface of the second insertion portion is a second tapered surface whose inner diameter increases as it approaches the tip. A male screw is formed on the outer peripheral surface of the second insertion portion. A flange projecting outward is formed at a position other than the male screw on the outer peripheral surface of the double female connector. The entire double female connector is integrally formed using a resin material.

  According to the present invention, a male luer of a syringe can be connected to the first insertion portion, and a male connector based on ISO 80369-3 can be connected to the second insertion portion and the male screw. Therefore, for example, a syringe and a catheter having a male connector conforming to ISO80369-3 at the upstream end can be connected via the double female connector of the present invention.

  The flange protrudes from the outer peripheral surface of the double female connector. The flange can be used to hold the double male connector when connecting the double female connector and the first and second male lures or extruding the liquid material in the syringe.

  The entire double female connector is integrally formed using a resin material. Thereby, manufacture of a double female connector becomes easy.

FIG. 1A is a perspective view of a double female connector according to an embodiment of the present invention as viewed from the first insertion portion side. FIG. 1B is a perspective view of the double female connector as viewed from the second insertion portion side. FIG. 1C is a cross-sectional view of the double female connector. FIG. 2 is a perspective view of a syringe provided with a first male luer connected to a first insertion part of a double female connector according to an embodiment of the present invention. FIG. 3A is a perspective view of a male connector connected to a second insertion portion of a double female connector according to an embodiment of the present invention. FIG. 3B is a cross-sectional view along a plane including the central axis of the male connector. 4A to 4C are perspective views sequentially illustrating a process of connecting the first male luer and the male connector of the syringe through the double female connector according to the embodiment of the present invention. FIG. 5A is a perspective view of a male connector being considered as ISO80369-3. FIG. 5B is a cross-sectional view along a plane including the central axis of the male connector. FIG. 6A is a perspective view of a female connector considered as ISO 80369-3. FIG. 6B is a cross-sectional view along a plane including the central axis of the female connector.

  Said double female connector of this invention WHEREIN: It is preferable that the said 1st male luer is provided in the opening | mouth part of the outer cylinder of a syringe.

  It is preferable that the second tapered surface of the second insertion portion and the male screw comply with ISO 80369-3. Thereby, the double female connector of this invention and the male connector based on ISO80369-3 can be connected according to ISO80369-3.

  It is preferable that the flange is provided between the first insertion portion and the second insertion portion. Thereby, since the flange is appropriately separated from both the opening of the first insertion portion and the opening of the second insertion portion, there is a possibility that the first tapered surface and the second tapered surface are contaminated by the operator's hand. Lower.

  Below, this invention is demonstrated in detail, showing suitable embodiment. However, it goes without saying that the present invention is not limited to the following embodiments. For convenience of explanation, the drawings referred to in the following description show only the main members necessary for explaining the present invention in a simplified manner among the constituent members of the embodiment of the present invention. Therefore, the present invention can include any member not shown in the following drawings. In the following drawings, the actual dimensions of members and the dimensional ratios of the members are not faithfully represented.

<Configuration of double female connector>
1A and 1B are perspective views of a double female connector 1 according to an embodiment of the present invention. FIG. 1C is a cross-sectional view of the double female connector 1. In FIG. 1C, the alternate long and short dash line 1 a is the central axis of the double female connector 1.

  The double female connector 1 includes a cylindrical first insertion portion 10 into which a first male luer 60 (see FIG. 2 described later) is inserted at one end, and a second male luer 70 (see FIG. 3A described later) is inserted at the other end. The cylindrical 2nd insertion part 20 is provided. The double female connector 1 is a female-female connector whose both ends are female connectors.

  The inner peripheral surface of the first insertion portion 10 is a tapered surface (first tapered surface) 12 whose inner diameter increases as it approaches the tip. The shape (inner diameter, taper angle, etc.) of the first tapered surface 12 is not limited, but may be, for example, a 6/100 tapered surface that conforms to ISO594-1 which is a general female correer adapted to a male luer of a syringe.

  In the present embodiment, the outer peripheral surface 14 of the first insertion portion 10 is also a tapered surface having a taper angle substantially the same as that of the first tapered surface 12. However, in the present invention, the shape of the outer peripheral surface 14 of the first insertion portion 10 is arbitrary. For example, the first tapered surface 12 may be a tapered surface having a different taper angle, or the outer diameter may be constant in the direction of the central axis 1a. Further, the cross-sectional shape of the outer peripheral surface 14 along the plane perpendicular to the central axis 1a is not necessarily circular, and may be any shape such as a regular polygon.

  The inner peripheral surface of the second insertion portion 20 is also a tapered surface (second tapered surface) 22 whose inner diameter increases as it approaches the tip. A male screw 26 is formed on the outer peripheral surface of the insertion portion 20. The shape of the second tapered surface 22 (inner diameter, taper angle, etc.) and the shape of the male screw 26 (diameter, pitch, etc.) are not limited, but conform to the ISO 80369-3 female connector (see FIGS. 6A and 6B). It is preferable. In the present embodiment, the male screw 26 is formed in the entire circumferential region of the outer peripheral surface of the insertion portion 20, but a part of the outer peripheral surface of the insertion portion 20 in the circumferential direction is the same as the male screw 926 in FIG. 6A. It may be formed only. Thus, when the male screw 26 is divided in the circumferential direction, the male screw 26 can be easily cleaned using the discontinuous portion of the male screw 26.

  A flange 30 protruding outward in the radial direction is formed between the first insertion portion 10 and the second insertion portion 20. The outer diameter of the flange 30 is such that the portion adjacent to the flange 30 in the direction of the central axis 1a (that is, the vicinity of the flange 30 of the first insertion portion 10 and the flange 30 of the second insertion portion 20 (or male screw 26)). It is larger than the outer diameter of the neighboring part.

  The flow path 9 penetrates the double female connector 1 along the central axis 1a. As a result, the first insertion portion 10 and the second insertion portion 20 communicate with each other via the flow path 9.

  The double female connector 1 is preferably made of a hard material having such a high rigidity that it can be regarded as substantially not deformed from a resin material. As the hard material, for example, a resin material such as polyacetal, polycarbonate, polystyrene, polyamide, polypropylene, polyethylene, hard polyvinyl chloride, ABS (acryl-butadiene-styrene copolymer) can be used. The double female connector 1 is integrally formed as a single part by a method such as injection molding using a resin material. Thereby, manufacture of the double female connector 1 becomes easy. Furthermore, since the resin material is a hard material, the strength and durability of the double female connector 1 are improved. In the present invention, the term “integrally formed” includes a case where it is created by a two-color molding method, but a plurality of separately created parts are fitted or fused together or an adhesive is used. Does not include integration.

<First male luer connected to double female connector>
An example of the 1st male luer connected to the double female connector 1 is demonstrated.

  FIG. 2 is a perspective view of the syringe 6 including the first male luer 60 connected to the first insertion portion 10 of the double female connector 1.

  The syringe 6 includes an outer cylinder 63 having a substantially cylindrical shape, and a plunger 67 inserted into the opening at the rear end of the outer cylinder 63 so as to be insertable / removable. At the rear end of the outer cylinder 63, a finger-hanging flange 65 protruding outward is provided to hold the outer cylinder 63 when the operator pushes the plunger 67 into the outer cylinder 63. A gasket (not shown) that slides while sealing the inner peripheral surface of the outer cylinder 63 in a liquid-tight manner is attached to the tip of the plunger 67.

  A cylindrical first male luer 60 is provided at the front end of the outer cylinder 63. The outer peripheral surface of the first male luer 60 is a tapered surface 62 whose outer diameter decreases as it approaches the tip. The shape (inner diameter, taper angle, etc.) of the taper surface 62 is not limited, but may be a 6/100 taper surface conforming to, for example, ISO594-1.

  The material of the outer cylinder 63 including the first male luer 60 is not limited, but is preferably made of a hard material having such a high rigidity that it can be regarded as not substantially deformed. For example, resin materials such as polyacetal, polycarbonate, polystyrene, polyamide, polypropylene, polyethylene, hard polyvinyl chloride, and ABS (acryl-butadiene-styrene copolymer) can be used.

  In the syringe 6, liquid substances such as nutrients injected into the patient in enteral nutrition therapy are stored.

<Male connector connected to double female connector>
An example of the male connector connected to the double female connector 1 will be described.

  FIG. 3A is a perspective view of the male connector 7 connected to the second insertion portion 20 of the double female connector 1. FIG. 3B is a cross-sectional view along a plane including the central axis of the male connector 7.

  The male connector 7 includes a cylindrical second male luer 70 inserted into the second insertion portion 20 at one end. The outer peripheral surface of the second male luer 70 is a tapered surface 72 whose outer diameter decreases as it approaches the tip. A cylindrical portion 75 is provided so as to surround the second male luer 70. A female screw 76 is formed on the inner peripheral surface of the cylindrical portion 75 (the surface facing the second male luer 70). The shape of the tapered surface 72 (outer diameter, taper angle, etc.) and the shape of the female screw 76 (diameter, pitch, etc.) are compliant with ISO 80369-3 male connectors (see FIGS. 5A and 5B).

  The other end of the male connector 7 is a base end portion 78 to which a flexible tube 79 is connected. The method for connecting the base end portion 78 and the tube 79 is not limited, but any method such as a method using an adhesive or a method using heat fusion may be used.

  The material of the male connector 7 is not limited, but is preferably made of a hard material having such a high rigidity that it can be regarded as not substantially deformed. For example, resin materials such as polyacetal, polycarbonate, polystyrene, polyamide, polypropylene, polyethylene, hard polyvinyl chloride, and ABS (acryl-butadiene-styrene copolymer) can be used.

  The male connector 7 and the tube 79 constitute a part of a catheter such as a PEG catheter or a nasal catheter conventionally used for enteral nutrition therapy. The male connector 7 is a male connector provided at the upstream end of the catheter. The opposite end (downstream end) of the tube 79 from the male connector 7 is inserted into the patient.

<How to use double female connector>
As shown in FIG. 4A, the double female connector 1 is used to connect the first male luer 60 of the syringe 6 and the male connector 7 provided at the upstream end of the catheter via the double female connector 1. Below, the usage method of the double female connector 1 is demonstrated.

  First, the double female connector 1 and the male connector 7 are connected. That is, the second male luer 70 of the male connector 7 is inserted into the second insertion portion 20 of the double female connector 1. Then, the double female connector 1 is rotated with respect to the male connector 7, and the male screw 26 of the double female connector 1 and the female screw 76 of the male connector 7 are screwed together. At this time, if the double female connector 1 is gripped by the flange 30, the screwing operation can be easily performed. Since the shape of the second taper surface 22 (see FIG. 1C) of the second insertion portion 20 matches the shape of the taper surface 72 (see FIG. 3B) of the second male luer 70, the second taper surface 22 and the taper surface 72 Are in close contact. Therefore, by firmly screwing the male screw 26 and the female screw 76, the double female connector 1 and the male connector 7 are liquid-tightly connected as shown in FIG. 4B.

  Next, as shown in FIG. 4B, the double female connector 1 and the syringe 6 are connected. That is, the first male luer 60 of the outer cylinder 63 of the syringe 6 is inserted into the first insertion portion 10 of the double female connector 1. Also at this time, the double female connector 1 is preferably held by the flange 30. By holding the flange 30, it is easy to apply a force toward the first male luer 60 to the double female connector 1. Since the shape of the first taper surface 12 (see FIG. 1C) of the first insertion portion 10 matches the shape of the taper surface 62 (see FIG. 2) of the first male luer 60, the first taper surface 12 and the taper surface 62 Are in close contact. Therefore, the 1st insertion part 10 and the 1st male luer 60 are connected fluid-tightly.

  Contrary to the above, the double female connector 1 and the syringe 6 may be connected first, and then the double female connector 1 and the male connector 7 may be connected. However, in this connection method, since the syringe 6 must be rotated when the male screw 26 and the female screw 76 are screwed together, the screwing operation is complicated.

  The double female connector 1 can be separated from the syringe 6 and the male connector 7 by performing an operation reverse to the above.

  As described above, the double female connector 1 of the present embodiment includes the first insertion portion 10 corresponding to the male luer 60 of the syringe 6 at one end, and corresponds to the male connector 7 conforming to ISO 80369-3 at the other end. A second insertion portion 20 and a male screw 26 are provided. Accordingly, the syringe 6 provided with the first male luer 60 not conforming to ISO 80369-3 and the catheter provided with the male connector 7 conforming to ISO 80369-3 at the upstream end are connected via the double female connector 1. be able to.

  The double female connector 1 and the first male luer 60 are connected with the same liquid tightness and connection strength as the connection between the first male luer 60 and a conventional female luer adapted thereto.

  Since the double female connector 1 and the male connector 7 are connected in accordance with ISO 80369-3, the male connector 901 (see FIGS. 5A and 5B) and the female connector 902 (see FIGS. 6A and 6B) of ISO 80369-3. It is connected with the same liquid tightness and connection strength as the connection with.

  The double female connector 1 includes a flange 30 protruding outward.

  The operator can grip the double female connector 1 with the flange 30 when connecting the double female connector 1 to the male connector 7 and the syringe 6. Thereby, since possibility that an operator touches the opening of the 1st insertion part 10 and the opening of the 2nd insertion part 20 will become low, the 1st taper surface 12 and the 2nd taper surface 22 may be contaminated. Lower. In addition, the possibility that an operator's hand accidentally touches the male lures 60, 70 to contaminate the male lures 60, 70 is also reduced.

  Further, in the state where the syringe 6 and the male connector 7 are connected via the double female connector 1 as shown in FIG. 4C, the plunger 67 (see FIG. 2) of the syringe 6 is pushed into the outer cylinder 63 and the liquid in the syringe 6 is liquidated. When pumping an object, the operator can hold the flange 30 of the double female connector 1 together with the outer cylinder 63. Thereby, the double female connector 1 is separated from the first male luer 60 due to the pressure applied to the liquid material, or the liquid material leaks from the connection portion between the first male luer 60 and the first insertion portion 10. The possibility of occurring is reduced.

  Since the entire double female connector 1 is integrally formed using a hard material, when the double female connector 1 is connected to the male connector 7 and the syringe 6 by gripping the flange 30 as described above, and When holding the flange 30 and pushing the plunger 67 in, the double female connector 1 is not deformed (for example, the first insertion 10 is twisted or buckled). Therefore, these operations can be performed stably and efficiently.

  The flange 30 is provided between the first insertion part 10 and the second insertion part 20. As a result, the flange 30 is appropriately separated from both the opening of the first insertion portion 10 and the opening of the second insertion portion 20, so that the first taper surface 12, the second taper surface 22, Is less likely to contaminate male lures 60,70. However, the position of the flange 30 in the direction of the central axis 1a is not limited to this. The flange 30 can be provided at any position other than the male screw 26 on the outer peripheral surface of the double female connector 1. For example, you may provide in the 1st insertion part 10, and you may provide in the front-end | tip (an end on the opposite side to the 2nd insertion part 20) of the 1st insertion part 10. However, from the viewpoint of preventing the above-described first tapered surface 12 and male luer 60 from being contaminated, it is desirable to be provided at a position away from the tip of the first insertion portion 10.

  The dimension of the flange 30 in the direction of the central axis 1a can be arbitrarily set. The flange 30 does not need to have a substantially disk shape with a small size in the direction of the central axis 1a as in the above-described embodiment, and may have a columnar shape with a relatively large size in the direction of the central axis 1a.

  In the above embodiment, the outer shape of the flange 30 viewed along the central axis 1a is circular, but the outer shape of the flange 30 is not limited to this. In order to prevent slipping when gripping the flange 30, the outer shape of the flange 30 viewed along the central axis 1 a is, for example, a polygon (a regular polygon such as a regular triangle, a square, a regular hexagon, or a rhombus). Any shape can be selected, such as an oval or oval (a shape that approximates a track for athletics). Any of an outer peripheral surface of the flange 30 (a surface opposite to the central axis 1a) and a main surface (a surface on the first insertion portion 10 side and a surface on the second insertion portion 20 side) facing in the direction of the central axis 1a. In order to prevent slippage, the surface may be provided with an uneven shape such as a protrusion (such as a dot-like protrusion or a rib-like protrusion) or a recess (such as a dot-like recess or a groove).

  Although there is no restriction | limiting in the utilization field of this invention, It can utilize as a connector for connecting the syringe used conventionally and the male connector based on ISO80369-3. In the above-described embodiment, the case where the present invention is used in the field of enteral nutrition therapy has been described. However, not only in the medical field other than enteral nutrition therapy, but also in fields other than medicine (for example, fields such as food and chemistry). Can be used.

DESCRIPTION OF SYMBOLS 1 Double female connector 6 Syringe 63 Outer cylinder 9 of a syringe Flow path 10 1st insertion part 12 1st taper surface 20 2nd insertion part 22 2nd taper surface 26 Male screw 30 Flange 60 1st male luer 70 2nd male lure

Claims (4)

A double knife in which a first insertion portion into which a first male luer is inserted is provided at one end, a second insertion portion into which a second male luer is inserted at the other end, and the first insertion portion and the second insertion portion communicate with each other A connector,
The first male luer is made of a hard material, and its outer peripheral surface is a male tapered surface whose outer diameter decreases as it approaches the tip of the first male luer,
The inner peripheral surface of the first insertion portion is a first tapered surface whose inner diameter increases as it approaches the tip.
The shape of the first taper surface matches the shape of the male taper surface of the first male luer so as to be in close contact with the male taper surface of the first male luer,
The inner peripheral surface of the second insertion part is a second tapered surface whose inner diameter increases as it approaches the tip,
A male screw is formed on the outer peripheral surface of the second insertion portion,
A flange protruding outward is formed at a position other than the male screw on the outer peripheral surface of the double female connector,
A double female connector characterized in that the whole is integrally formed using a resin material.   The double female connector according to claim 1, wherein the first male luer is provided in a mouth portion of an outer cylinder of a syringe.   2. The double female connector according to claim 1, wherein the second tapered surface of the second insertion portion and the male screw comply with ISO 80369-3.   The double female connector according to claim 1, wherein the flange is provided between the first insertion portion and the second insertion portion.

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