WO2020196511A1

WO2020196511A1 - Adapter

Info

Publication number: WO2020196511A1
Application number: PCT/JP2020/012999
Authority: WO
Inventors: 森岡淳治; 野口央照
Original assignee: 株式会社ジェイ・エム・エス
Priority date: 2019-03-27
Filing date: 2020-03-24
Publication date: 2020-10-01
Also published as: JP2020156828A; JP7223265B2

Abstract

This adapter (1) is provided with: a puncture needle (10); a plurality of claws (20) that protrude toward the puncture needle (10); a plurality of elastically-deformable arms (30) that are provided with the plurality of claws (20); and a co-injection port (40) that is connected to the puncture needle (10). The puncture needle (10) is disposed eccentrically with respect to a circle (25) that inscribes the plurality of claws (20) when viewed along the longitudinal direction of the puncture needle (10).

Description

adapter

The present invention relates to an adapter provided with a puncture needle capable of puncturing a female connector and a claw engaging with a female connector.

In the medical field, infusion solutions that administer drug solutions containing drugs, nutritional components, electrolytes, etc. to patients are widely used. The infusion is generally performed according to the following procedure. First, prepare an infusion bag, a syringe, and an infusion set. Physiological saline and the like are stored in advance in the infusion bag. A liquid containing a drug or the like to be administered to a patient is stored in the syringe. The infusion set consists of a long, flexible tube, the upstream end of which is provided with a puncture needle with a sharp tip and the downstream end of which is provided with an injection needle. Next, the metal needle of the syringe is punctured into the rubber stopper of the port of the infusion bag, the liquid in the syringe is injected into the infusion bag, and the drug solution is prepared in the infusion bag. After that, the metal needle is pulled out, and instead, the puncture needle of the infusion set is punctured into the rubber stopper of the port. The needle of the infusion set is punctured into the patient's vein. Then, the clamp provided in the infusion set is opened to start the infusion.

In the above procedure, the metal needle of the syringe and the puncture needle of the infusion set are sequentially pierced into the rubber stopper of the port of the infusion bag. A puncture hole (puncture mark) remains in the rubber stopper after puncturing the metal needle. When a relatively thick puncture needle is punctured into a rubber stopper, the puncture needle deforms the rubber stopper. When a puncture needle is pierced near a puncture hole by a metal needle, the puncture hole is enlarged, and the drug solution in the infusion bag may leak to the outside through the puncture hole. This can lead to medical accidents in which workers and patients are exposed to drugs when the drug solution contains dangerous drugs such as anticancer drugs. Therefore, as shown in FIG. 14, on the outer surface of the rubber stopper 91 of the port 90, a region 92 to be pierced with a metal needle and a region 93 to be pierced with a piercing needle may be displayed. The region 92 and the region 93 are arranged apart from each other at positions off the center of the rubber stopper 91. As long as the metal needle and the puncture needle are correctly punctured in the region 92 and the region 93, respectively, the possibility of leakage of the drug solution is low. In reality, a bag-shaped bag body constituting the infusion bag is attached to the base end 99 of the port 90, but the bag body is not shown in FIG.

If the puncture needle of the infusion set is simply punctured into the rubber stopper 91, the puncture needle may come out of the rubber stopper 91 when tension is applied to the tube of the infusion set. In this case, the chemical solution may leak to the outside world and a medical accident similar to the above may occur.

Patent Document 1 describes an example of an adapter for preventing unintentional separation between the port of the infusion bag and the infusion set. The adapter comprises a puncture needle with a sharp tip, multiple claws arranged around the puncture needle, and a mixed injection port communicating with the puncture needle. The puncture needle is pierced into the rubber stopper of the port of the infusion bag, and the plurality of claws are engaged with the port. The mixed injection port includes a plate-shaped partition member (hereinafter referred to as “septum”) in which a linear slit is formed. The septum is made of an elastic material such as rubber and functions as a self-closing valve. As the infusion set, a set having a male connector that can be connected to the mixed injection port is provided at the upstream end thereof (see, for example, Patent Document 2). The male connector includes a male member inserted into the slit of the septum and a claw that engages with the mixed injection port (see, for example, Patent Document 3). The multiple claws of the adapter engage the ports of the infusion bag, and the claws of the male connector of the infusion set engage the mixed injection port of the adapter, so that even if tensile force is applied to the infusion set, the port, adapter, The connection between the male connectors is maintained.

In the above adapter, multiple nails are arranged at equal intervals along a common circle centered on the puncture needle. That is, the adapter is configured such that the piercing needle pierces the center of the rubber stopper. Therefore, when the adapter is connected to the port 90, the puncture needle punctures the center of the rubber stopper 91 instead of the area 93 that should be punctured originally.

It is recommended that the adapter be connected to the port of the infusion bag before preparing the drug solution in the infusion bag. That is, the adapter is connected to the infusion bag in which the physiological saline or the like is stored and before the predetermined drug or the like is injected. A predetermined drug or the like is injected into the infusion bag through the mixed injection port of the adapter to prepare the drug solution. Then connect the infusion set to the mixed injection port. In this case, since the metal needle is not punctured in the rubber stopper 91, there is no problem even if the puncture needle of the adapter punctures the center of the rubber stopper 91 instead of the region 93.

Japanese Unexamined Patent Publication No. 2014-07935 International Publication No. 2018/074294 International Publication No. 2013/154050

However, in an actual medical field, a metal needle of a syringe is punctured into the area 92 of the rubber stopper 91 of the port 90 to inject a predetermined drug or the like into an infusion bag to prepare a drug solution, and then an adapter is attached to the port 90. May connect to. The center of the rubber stopper 91 punctured by the puncture needle of the adapter is relatively close to the region 92 in which the puncture hole by the metal needle is formed. Therefore, when the puncture needle is punctured, the rubber stopper is deformed, the puncture hole by the metal needle is enlarged, and the chemical solution may leak.

An object of the present invention is to provide an adapter capable of puncturing a puncture needle at a position off the center of a rubber stopper.

The adapter of the present invention includes a puncture needle capable of puncturing a female connector, a plurality of claws protruding toward the puncture needle so as to engage with the female connector when the puncture needle is punctured into the female connector, and the plurality of claws. The claws are provided, and a plurality of arms that can be elastically deformed so that the plurality of claws are separated from the puncture needle, and a mixed injection port communicating with the puncture needle are provided. When viewed along the longitudinal direction of the piercing needle, the piercing needle is eccentric with respect to a circle inscribed in the plurality of nails.

According to the adapter of the present invention, the puncture needle can be punctured at a position off the center of the female connector while engaging a plurality of claws with the female connector.

FIG. 1 is a perspective view of an adapter according to the first embodiment of the present invention. FIG. 2 is a perspective view of the adapter according to the first embodiment of the present invention as viewed from another direction. FIG. 3 is a cross-sectional perspective view of the adapter according to the first embodiment of the present invention along the surface including the 3-3 line of FIG. FIG. 4 is a bottom view of the adapter according to the first embodiment of the present invention. FIG. 5 is a perspective view of the adapter according to the first embodiment of the present invention immediately before connecting to the port of the infusion bag. FIG. 6 is a perspective view of the adapter according to the first embodiment of the present invention connected to the port of the infusion bag. FIG. 7 is a cross-sectional view of the adapter according to the first embodiment of the present invention along the plane including the line 7-7 of FIG. FIG. 8 is a perspective view of the adapter according to the second embodiment of the present invention. FIG. 9 is a perspective view of the adapter according to the second embodiment of the present invention as viewed from another direction. FIG. 10 is a cross-sectional perspective view of the adapter according to the second embodiment of the present invention along the surface including the line 10-10 of FIG. FIG. 11 is a bottom view of the adapter according to the second embodiment of the present invention. FIG. 12 is a perspective view of the adapter according to the second embodiment of the present invention connected to the port of the infusion bag. FIG. 13 is a cross-sectional view of the adapter according to the second embodiment of the present invention along the plane including lines 13-13 of FIG. FIG. 14 is a perspective view showing an example of a port of the infusion bag.

In the above adapter of the present invention, the plurality of claws may be unevenly arranged along the circle. “Non-uniform” means that the plurality of claws are not evenly spaced along the circle, or that the plurality of claws are not evenly spaced with respect to the center of the circle. In this aspect, when an external force (particularly, a tensile force via an infusion set) is applied to the adapter with the adapter connected to the female connector, the tilt of the adapter with respect to the female connector is effective with a limited number of claws. It is advantageous to suppress the target.

The plurality of claws and the plurality of arms may not be arranged on the side where the center of the circle is located with respect to the puncture needle. Such an embodiment facilitates visual inspection of the tip of the puncture needle and the female connector when connecting the adapter to the female connector.

The adapter of the present invention may further include a top plate protruding outward at a position between the puncture needle and the mixed injection port. The plurality of arms may be provided on the top plate. When viewed along the longitudinal direction of the piercing needle, the portion of the top plate on the side where the center of the circle is located with respect to the piercing needle may be cut out. Such an embodiment makes it easy to visually recognize the tip of the puncture needle and the female connector when the adapter is connected to the female connector, and secondly, the female connector with the adapter connected to the female connector. Allows the metal needle of a syringe to be pierced.

The mixed injection port may be eccentric to the circle on the same side as the puncture needle is eccentric to the circle. In particular, the mixed injection port may be more eccentric with respect to the circle than the puncture needle. In such an embodiment, firstly, it is easy to pierce the female connector with a metal needle of a syringe or the like while the adapter is connected to the female connector, and secondly, the adapter is pulled to the adapter while being connected to the female connector. It is advantageous to suppress the tilt of the adapter with respect to the female connector when a force is applied.

Each of the plurality of arms may include a first elastic portion and a second elastic portion extending substantially parallel to the puncture needle. The claw may be provided on the tip side of the first elastic portion and the second elastic portion. The first elastic portion and the second elastic portion may be arranged along a circle concentric with the circle. The first elastic portion may be arranged closer to the puncture needle than the second elastic portion. The first elastic portion may have higher strength than the second elastic portion. Such an embodiment is advantageous in preventing the claw from being disengaged from the female connector when a tensile force is applied to the adapter with the adapter connected to the female connector.

Of the plurality of claws, the arm provided with the claw closest to the puncture needle may have higher strength than the other arms. Such an embodiment is advantageous in preventing the claw from being disengaged from the female connector when a tensile force is applied to the adapter with the adapter connected to the female connector.

The present invention will be described in detail below with reference to suitable embodiments. However, it goes without saying that the present invention is not limited to the following embodiments. For convenience of explanation, each figure referred to in the following description is a simplified representation of the main members constituting the embodiment of the present invention. Therefore, the present invention may include any member not shown in each of the following figures. Further, within the scope of the present invention, each member shown in each of the following figures may be changed or omitted. In the drawings cited in the description of each embodiment, the members corresponding to the members shown in the drawings cited in the preceding embodiments are designated by the same reference numerals as those assigned in the drawings of the preceding embodiments. is there. Overlapping description of such members has been omitted, and description of the preceding embodiments should be taken into account as appropriate.

(Embodiment 1)
1 and 2 are perspective views of the adapter 1 according to the first embodiment of the present invention. FIG. 3 is a cross-sectional perspective view of the adapter 1 along the surface including the 3-3 line of FIG. The adapter 1 includes a puncture needle 10, two claws 20 protruding toward the puncture needle 10, two arms 30 provided with the two claws 20, and a mixed injection port 40. For the convenience of the following description, the longitudinal direction of the puncture needle 10 is referred to as "vertical direction", and the direction parallel to the plane orthogonal to the longitudinal direction of the puncture needle 10 is referred to as "horizontal direction". In the vertical direction, the side of the mixed injection port 40 is referred to as the "upper" side, and the side of the tip 11 of the puncture needle 10 is referred to as the "lower" side. However, "vertical direction", "upper", "lower", and "horizontal direction" do not mean the orientation of the adapter 1 when it is actually used.

The piercing needle 10 has a rod shape that extends straight, and its tip 11 is sharply formed. In the puncture needle 10, a flow path 12 through which a liquid (for example, a chemical solution) flows is provided along the longitudinal direction of the puncture needle 10. Two openings (horizontal holes) 13 are provided on the outer peripheral surface near the tip 11 of the puncture needle 10. The flow path 12 communicates with the opening 13 and communicates with the outside world through the opening 13.

From the position between the puncture needle 10 and the mixed injection port 40 (or the base end of the puncture needle 10), the top plate 35 is outward along the direction perpendicular to the longitudinal direction (that is, the radial direction) of the puncture needle 10. It is extending. The top plate 35 is a thin plate having an outer peripheral edge having a substantially circular (or substantially arc) shape in a plan view (a shape viewed along the longitudinal direction of the piercing needle 10). Two arms 30 extend downward from the outer peripheral edge of the top plate 35 so as to face the puncture needle 10. Each arm 30 includes two elastic portions 31 extending in the vertical direction from the top plate 35 and a cross-linking portion 32 connecting the lower ends of the two elastic portions 31, thereby forming a substantially "U" shape as a whole. Have. The elastic portion 31 is an elongated plate-shaped member, and its main surface (the surface having the largest area) faces the puncture needle 10. The cross-linked portion 32 has a substantially arc shape along a horizontal plane (a plane parallel to the horizontal direction). A substantially rectangular opening 33 surrounded by the arm 30 and the top plate 35 is formed, and the puncture needle 10 inside the arm 30 can be seen through the opening 33.

A claw 20 is provided on the cross-linked portion 32 that constitutes the tip portion of each arm 30. The claw 20 projects toward the puncture needle 10 from the surface of the cross-linking portion 32 facing the puncture needle 10. The claw 20 includes a locking plate 22 and a rib 23 provided on the lower surface of the locking plate 22. The locking plate 22 is a flat plate having a substantially trapezoidal shape, a substantially triangular shape, or a substantially fan shape, and is inclined toward the tip 21 (the portion closest to the puncture needle 10) so as to approach the top plate 35. The tip (that is, the tip of the claw 20) 21 of the locking plate 22 is recessed in an arc shape. The rib 23 is a thin plate-like protrusion protruding downward from the lower surface of the locking plate 22. The lower edge 24 of the rib 23 is bulged in an arc shape, and smoothly connects the tip 21 of the claw 20 and the lower end of the bridge portion 32.

The arm 30 has a cantilever support structure having a fixed end at a connecting portion with the top plate 35. The elastic portion 31 constituting the arm 30 can be elastically bent and deformed relatively easily. The claw 20 is provided at the free end of the arm 30. Therefore, the arm 30 can be elastically deformed so that the claw 20 is separated from the puncture needle 10. Since the slits 36 are provided between the adjacent arms 30, each arm 30 can be deformed independently of each other.

The mixed injection port 40 includes a tubular portion 41 having a substantially cylindrical shape, a partition wall member (hereinafter referred to as “septum”) 45 provided at the upper end of the tubular portion 41, and a cap 47 covered with the septum 45. The lumen 42 in the tubular portion 41 communicates with the flow path 12 in the puncture needle 10. The septum 45 is a thin plate made of an elastic material such as rubber and having a circular plan view shape. A linear slit (cut) 46 that penetrates the septum 45 in the vertical direction is formed in the center of the septum 45. The septum 45 is placed on the upper end of the tubular portion 41, and the cap 47 is attached to the tubular portion 41 from above the septum 45. The septum 45 is sandwiched in the vertical direction by the tubular portion 41 and the cap 47. The slit 46 of the septum 45 is exposed in the opening 48 formed on the upper surface of the cap 47. When a tubular male member (not shown) having no sharp tip is inserted into the slit 46 of the septum 45, the septum 45 is elastically deformed and the cavity 42 in the tubular portion 41 and the male member communicate with each other. .. When the male member is pulled out from the septum 45, the septum 45 immediately returns to the initial state, and the slit 46 is closed liquid-tightly. In this way, the septum 45 functions as a self-closing valve. Such a self-closing mixed injection port 40 is also referred to as a "needleless port".

FIG. 4 is a bottom view of the adapter 1 viewed from the tip 11 side of the puncture needle 10 along the longitudinal direction of the puncture needle 10. The arc of the tip 21 of the two claws 20 is along the common circle 25 indicated by the alternate long and short dash line. The point 26 is the center of the circle 25. The cross-linked portion 32 of the arm 30 is along a common circle concentric with the circle 25. The main surface of the elastic portion 31 of the arm 30 is in contact with a common circle concentric with the circle 25. The outer peripheral edge of the top plate 35 (see FIGS. 1 and 2) is also along a circle concentric with the circle 25. On the other hand, the puncture needle 10 is located off the center 26 of the circle 25. That is, the piercing needle 10 is eccentric with respect to the circle 25 inscribed in the tip 21 of the claw 20. In the present invention, the side where the puncture needle 10 is located with respect to the center 26 of the circle 25 is referred to as the "eccentric side" (the side facing the arrow D1 in FIG. 4), and the puncture needle 10 is located with respect to the center 26 of the circle 25. The side opposite to the position side (that is, the side where the center 26 of the circle 25 is located with respect to the puncture needle 10) is referred to as the "anti-eccentric side" (the side in which the arrow D2 faces in FIG. 4). The puncture needle 10 is located inside the circle 25. The surface S including the center 26 and the central axis of the puncture needle 10 (not shown. The central axis passes through the tip 11 and extends along the longitudinal direction of the puncture needle 10) is referred to as an "eccentric direction surface". The cross section of FIG. 3 coincides with the eccentric direction plane S. The claw 20 is arranged so that the distance from the piercing needle 10 to the claw 20 (particularly the tip 21 thereof) is shortened on the eccentric side D1. The claws 20 are unevenly arranged along the circle 25. The claw 20 and the arm 30 are not arranged on the anti-eccentric side D2 with respect to the center 26 (or the puncture needle 10). The top plate 35 is provided with a notch 37 extending from the edge of the anti-eccentric side D2 to the vicinity of the proximal end of the puncture needle 10 (see FIG. 1). The adapter 1 is symmetrical with respect to the eccentric plane S.

It is preferable that the portion of the adapter 1 excluding the septum 45 and the cap 47 is integrally manufactured as one part by injection molding a resin material. The resin material that can be used is not limited, and examples thereof include polyethylene, polypropylene, polycarbonate, styrene ethylene, polyethylene terephthalate, polybutylene terephthalate, and butylene styrene block copolymer, but those used for medical purposes and arms. Considering that 30 is elastically bent and deformed, polyolefin resins such as polyethylene and polypropylene are preferable. The material of the cap 47 is not limited, but is preferably a hard material, and for example, a resin material such as polycarbonate, polypropylene, polyacetal, polyamide, hard polyvinyl chloride, and polyethylene can be used. The material of the septum 45 is not limited, but is preferably a soft material having rubber elasticity, and for example, a rubber material such as isoprene rubber, silicone rubber, or butyl rubber, a thermoplastic elastomer, or the like can be used.

An example of how to use the adapter 1 will be explained.

First, as shown in FIG. 5, the adapter 1 is made to face the port (female connector) 90 of the infusion bag. The port 90 is the same as that shown in FIG. The infusion bag includes a port 90 and a flexible bag-shaped bag body attached to the base end 99 of the port 90. Similar to FIG. 14, in FIG. 5, the bag body is not shown. The upwardly facing opening 95 of the port 90 is sealed with a rubber stopper 91. A predetermined drug or the like has already been injected into the infusion bag by puncturing the area 92 of the rubber stopper 91 with a metal needle of a syringe. Therefore, a puncture hole (puncture mark) 92a by a metal needle is formed in the region 92. Since the rubber stopper 91 elastically recovers when the metal needle is removed, the puncture hole 92a is substantially closed in the state of FIG.

The adapter 1 is brought close to the port 90, and the puncture needle 10 is punctured into the area 93 of the rubber stopper 91.

When the adapter 1 is pushed toward the port 90, the piercing needle 10 is inserted into the rubber stopper 91, and in parallel with this, the end edge 24 (see FIG. 3) of the rib 23 integrally provided on the claw 20 is ported. It slides on the upper edge 96 of 90. The edge 24 moves the claw 20 away from the puncture needle 10 (outside) while sliding on the upper edge 96. As the claw 20 moves, the elastic portion 31 of the arm 30 elastically bends and deforms. Further, the adapter 1 is pushed toward the port 90. When the tip 21 of the claw 20 exceeds the step 97 of the port 90, the elastic portion 31 elastically recovers, and the claw 20 fits into the small diameter portion 98 having a relatively small outer diameter. The claw 20 engages with a step 97 adjacent to the small diameter portion 98.

Thus, as shown in FIG. 6, the adapter 1 can be connected to the port 90. FIG. 7 is a cross-sectional view taken along a plane (eccentric direction plane) including the line 7-7 of FIG. The two claws 20 (see FIGS. 1 to 5) sandwich the small diameter portion 98 of the port 90. The claw 20 is substantially along a circle concentric with the central axis (not shown) of the port 90. The two claws 20 each stably engage the port 90. Even if a force is applied to the adapter 1 and the port 90 in a direction to separate them, the engagement of the claw 20 with the port 90 is not disengaged.

The arm 30 can be appropriately deformed according to the outer diameter of the port 90. The adapter 1 can be connected to a plurality of types of ports 90 having different outer diameters.

The puncture needle 10 is eccentric with respect to the inscribed circle 25 of the nail 20 (see FIG. 4). Therefore, when the claw 20 engages with the port 90, the puncture needle 10 makes the region 93 off the center of the rubber stopper 91 perpendicular to the surface of the rubber stopper 91 (or on the central axis of the port 90). Puncture (in parallel).

As described above, in the conventional adapter, the puncture needle is arranged at the center of the circle inscribed in the tips of a plurality of nails when viewed along the longitudinal direction of the puncture needle. Therefore, in order to properly engage the plurality of claws with the port 90, it is necessary to puncture the puncture needle in the center of the rubber stopper 91. Since the center of the rubber stopper 91 is close to the puncture hole 92a by the metal needle already formed in the region 92, the puncture hole 92a expands when the puncture needle pierces the rubber stopper 91, and the drug solution in the infusion bag leaks out. The problem arises. On the other hand, when an attempt is made to forcibly puncture the puncture needle into the region 93 off the center of the rubber stopper 91, (1) all of the plurality of claws cannot be engaged with the port 90, and (2) the claws are provided. Bending force acts on the arm and the puncture needle to damage them. (3) The puncture needle 10 that punctures the rubber stopper 91 at an angle greatly deforms the rubber stopper 91 and passes through the enlarged puncture hole 92a or , The chemical liquid leaks through the gap between the puncture needle 10 and the rubber stopper 91, and the like occurs.

The adapter 1 of the first embodiment can solve the above-mentioned problems of the conventional adapter. According to the first embodiment, the puncture needle 10 can puncture the region 93 off the center of the rubber stopper 91 without tilting with respect to the rubber stopper 91. Region 93 is separated from Region 92. Therefore, even if the puncture hole 92a by the metal needle is formed in the region 92, the puncture hole 92a is not expanded by puncturing the rubber stopper 91 with the puncture needle 10, and the drug solution does not leak out.

After connecting the adapter 1 to the port 90 as shown in FIGS. 6 and 7, connect the male connector (not shown) at the upstream end of the infusion set to the mixed injection port 40 of the adapter 1. The male connector includes a male member inserted into the slit 46 of the septum 45 and a claw that engages with the mixed injection port 40 (see, for example, Patent Document 3). The claw 20 of the adapter 1 engages the port 90, and the claw of the male connector engages the mixed injection port 40. Therefore, even if a tensile force is applied to the infusion set, the connection between the port 90, the adapter 1, and the male connector is maintained.

A notch 37 is formed on the top plate 35. The notch 37 is provided from the edge of the anti-eccentric side D2 of the top plate 35 toward the piercing needle 10. The notch 37 has the following effects. First, as can be seen from FIGS. 5 and 6, when the adapter 1 is connected to the port 90, the tip 11 of the puncture needle 10 and the upper surface (particularly the region 93) of the rubber stopper 91 are connected through the notch 37. Can be visually observed. This is advantageous for accurately puncturing the puncture needle 10 into the region 93 of the rubber stopper 91. Second, as shown in FIGS. 6 and 7, after the adapter 1 is connected to the port 90, the upper surface (particularly the region 92) of the rubber stopper 91 is exposed through the notch 37. This means that with the adapter 1 connected to the port 90, a metal needle of a syringe can be pierced into the region 92 of the rubber stopper 91 to inject a liquid containing a drug or the like into the infusion bag to prepare a drug solution in the infusion bag. , Enables operations that were not possible with conventional adapters.

The arm 30 is not provided in the portion of the top plate 35 where the notch 37 is provided. Therefore, the claw 20 and the arm 30 are not arranged on the side (anti-eccentric side D2) where the center 26 of the inscribed circle 25 is located with respect to the puncture needle 10. This makes it easy to visually recognize the tip 11 of the puncture needle 10 and the upper surface (particularly the region 93) of the rubber stopper 91 from the anti-eccentric side D2 when the adapter 1 is connected to the port 90 (FIG. 5, FIG. (See FIG. 6).

As shown in FIG. 7, the mixed injection port 40 is eccentric to the inscribed circle 25 (see FIG. 4) of the claw 20 on the same side (eccentric side D1) as the puncture needle 10 is eccentric. .. In particular, the mixed injection port 40 is more eccentric to the eccentric side D1 with respect to the inscribed circle 25 than the puncture needle 10. Therefore, even if the mixed injection port 40 has a diameter larger than that of the puncture needle 10, the mixed injection port 40 does not substantially overlap the notch 37 formed in the top plate 35 in the vertical direction. The notch 37 is opened upward without being blocked by the mixed injection port 40. This is because the syringe and its metal needle collide with the mixed injection port 40 when the metal needle of the syringe is punctured in the region 92 of the rubber stopper 91 with the adapter 1 connected to the port 90 (see FIGS. 6 and 7). It is advantageous to avoid.

As shown in FIG. 4, the claws 20 are along the inscribed circle 25 so that the distance between the adjacent claws 20 along the circumferential direction is narrow on the eccentric side D1 and wide on the anti-eccentric side D2. Is unevenly arranged. That is, on the eccentric side D1 where the distance from the puncture needle 10 to the claw 20 (particularly, the tip 21 thereof) is relatively short, the distance between the claws 20 is narrow. The fact that the claws 20 are densely arranged near the piercing needle 10 in this way suppresses the inclination of the adapter 1 with respect to the port 90 when an external force is applied to the adapter 1 while the adapter 1 is connected to the port 90. It is advantageous for.

The tensile force applied to the infusion set acts upward on the mixed injection port 40 as shown by the arrow F in FIG. The tensile force F generates a rotational moment with the engagement point between the claw 20 and the port 90 as a fulcrum. The magnitude of the rotational moment depends on the horizontal distance from the mixed injection port 40 to the claw 20. In the first embodiment, as described above, the mixed injection port 40 is eccentric to the eccentric side D1 (preferably larger than the puncture needle 10) with respect to the inscribed circle 25. This shortens the horizontal distance between the mixed injection port 40 and the claw 20. Therefore, the rotational moment becomes small. This is advantageous for reducing the inclination of the adapter 1 with respect to the port 90 when a tensile force F is applied to the adapter 1. When the adapter 1 is tilted with respect to the port 90, the claw 20 is disengaged from the port 90. The puncture needle 10 is tilted with respect to the rubber stopper 91 to form a gap between the puncture needle 10 and the rubber stopper 91. , The chemical solution in the chemical solution bag leaks to the outside through this gap, and the like may occur. In the first embodiment, such a problem is unlikely to occur.

The slit 36 between the adjacent arms 30 does not reach the top plate 35 (see FIG. 2). Of the two elastic portions 31 (31a, 31b) constituting each arm 30, the first elastic portion 31a adjacent to the slit 36 is shorter than the second elastic portion 31b. Therefore, the first elastic portion 31a has higher strength than the second elastic portion 31b and is less likely to be bent and deformed. When viewed along the longitudinal direction of the puncture needle 10, the relatively high-strength first elastic portion 31a is arranged closer to the puncture needle 10 (or mixed injection port 40) than the second elastic portion 31b. (See FIGS. 1 to 4). This is advantageous in preventing the claw 20 from being disengaged from the port 90 when a tensile force F is applied. The reason for this is as follows. The tensile force F acts on the mixed injection port 40 to pull the adapter 1 away from the port 90 along the longitudinal direction of the puncture needle 10 (see FIG. 7). Of the two

elastic portions

31a and 31b, the first elastic portion 31a, which is closer to the puncture needle 10 and the mixed injection port 40, mainly opposes the tensile force F. The relatively high strength of the first elastic portion 31a reduces the deformation of the first elastic portion 31a when a tensile force F is applied to the mixed injection port 40. Therefore, the engagement of the claw 20 with the port 90 is difficult to be disengaged. On the other hand, the relatively low strength of the second elastic portion 31b facilitates the work of connecting the adapter 1 to the port 90.

The method of making the first elastic portion 31a stronger than the second elastic portion 31b is not limited to the first embodiment and is arbitrary. For example, the first elastic portion 31a may have a relatively high strength by increasing the cross-sectional area of the first elastic portion 31a, providing a rib for reinforcement in the first elastic portion 31a, or the like. Unlike the first embodiment, in the present invention, the first elastic portion 31a and the second elastic portion 31b may have substantially the same strength.

With the adapter 1 of the first embodiment, it is difficult to puncture the puncture needle 10 in the center of the rubber stopper 91. However, this does not cause any problems when infusing.

(Embodiment 2)
8 and 9 are perspective views of the adapter 2 according to the second embodiment of the present invention. FIG. 10 is a cross-sectional perspective view of the adapter 2 along the surface (eccentric direction surface) including the line 10-10 of FIG. The adapter 2 of the second embodiment has two claws 20 and two arms 30 in that it includes three claws 220 protruding toward the puncture needle 10 and three arms 230 provided with the three claws 220. It is different from the adapter 1 of the first embodiment including. Hereinafter, the adapter 2 of the second embodiment will be described with a focus on the differences from the first embodiment.

In the following description, when it is necessary to distinguish between the three claws 220 and the three arms 230, the subscripts "a" and "b" are added to their symbols as shown in FIGS. 8 and 9. , Or "c". The claw 220a is arranged between the claw 220b and the claw 220c. The

claws

220a, 220b, 220c are provided on the

arms

230a, 230b, 230c, respectively.

Three arms 230 extend downward from the outer peripheral edge of the top plate 35 so as to face the puncture needle 10. Similar to the arm 30 of the first embodiment, each arm 230 includes two elastic portions 31 extending in the vertical direction from the top plate 35 and a bridging portion 32 connecting the lower ends of the two elastic portions 31. As a whole, it has a substantially "U" shape.

A claw 220 is provided on the cross-linked portion 32 forming the tip portion of the arm 230. The claw 220 protrudes toward the piercing needle 10 from the surface of the bridging portion 32 facing the piercing needle 10. Similar to the claw 20 of the first embodiment, each claw 220 includes a locking plate 22 and a rib 23 provided on the lower surface of the locking plate 22. Two ribs 23 are provided on the central claw 220a, and one rib 23 is provided on the

claws

220b and 230c on both sides thereof.

The arm 230 can be elastically deformed so that the claw 220 is separated from the puncture needle 10. Since the slits 36 are provided between the arm 230a and the arm 230b and between the arm 230a and the arm 230c, the

arms

230a, 230b, and 230c can be deformed independently of each other.

FIG. 11 is a bottom view of the adapter 2 as viewed from the tip 11 side of the puncture needle 10 along the longitudinal direction of the puncture needle 10. Similar to the first embodiment, the arc of the tip 21 of the three claws 220 is along the common circle 25 indicated by the two-point chain line. The cross-linked portion 32 of the arm 230 is along a common circle concentric with the circle 25. The main surface of the elastic portion 31 of the arm 230 is in contact with a common circle concentric with the circle 25. The outer peripheral edge of the top plate 35 (see FIGS. 8 and 9) is also along a circle concentric with the circle 25. On the other hand, the puncture needle 10 is eccentric to the eccentric side D1 with respect to the circle 25. The claws 220 are unevenly arranged along the circle 25. The claw 220 and the arm 230 are not arranged on the anti-eccentric side D2 with respect to the center 26 (or the piercing needle 10). The top plate 35 is provided with a notch 37 extending from the edge of the anti-eccentric side D2 to the vicinity of the proximal end of the puncture needle 10. The adapter 2 is symmetrical with respect to the eccentric plane S. The central claw 220a is located on the eccentric direction surface S.

The adapter 2 is connected to the port 90 of the infusion bag in the same manner as the adapter 1 of the first embodiment. FIG. 12 is a perspective view of the adapter 2 connected to the port 90. FIG. 13 is a cross-sectional view taken along a plane (eccentric direction plane) including lines 13-13 of FIG.

The three claws 220 engage with the step 97 of the port 90 and sandwich the small diameter portion 98. The claw 220 is substantially along a circle concentric with the central axis (not shown) of the port 90. Each of the three claws 220 is stably engaged with the port 90. Even if a force is applied to the adapter 2 and the port 90 in a direction to separate them, the engagement of the claw 220 with the port 90 is not disengaged.

The puncture needle 10 punctures the region 93 off the center of the rubber stopper 91 perpendicularly to the surface of the rubber stopper 91 (or parallel to the central axis of the port 90). Even if the puncture hole 92a by the metal needle is formed in the region 92 of the rubber stopper 91, the puncture hole 92a is not expanded by puncturing the region 93 with the puncture needle 10 and the drug solution does not leak out.

Similar to the first embodiment, after connecting the adapter 2 to the port 90 as shown in FIGS. 12 and 13, a male connector (not shown) at the upstream end of the infusion set is connected to the mixed injection port 40 of the adapter 2.

As shown in FIG. 11, the claw 220 is along the inscribed circle 25 so that the distance between adjacent claws 220 along the circumferential direction is narrow on the eccentric side D1 and wide on the anti-eccentric side D2. Is unevenly arranged. In particular, the claw 220a located on the eccentric side D1 with respect to the piercing needle 10 is arranged closest to the piercing needle 10. Such an arrangement of the claws 220 is advantageous in suppressing the inclination of the adapter 2 with respect to the port 90 when an external force is applied to the adapter 2 while the adapter 2 is connected to the port 90.

Similar to the first embodiment, the mixed injection port 40 is eccentric to the eccentric side D1 (preferably larger than the puncture needle 10) with respect to the inscribed circle 25. Therefore, the horizontal distance from the mixed injection port 40 to the claw 220 (particularly the claw 220a) is short. This is advantageous in suppressing the inclination of the adapter 2 with respect to the port 90 when a tensile force F (see FIG. 13) is applied to the adapter 2.

Further, as can be understood from FIGS. 9 and 11, the distance between the two elastic portions 31 constituting the arm 230a provided with the claw 220a is the distance between the two elastic portions 31 constituting the

arms

230b and 230c, respectively. Greater than the distance. Therefore, the arm 230a has higher strength than the

arms

230b and 230c and is less likely to be bent and deformed. The reason is as follows. As shown in FIG. 11, the main surface of each elastic portion 31 faces the center 26 of the inscribed circle 25. When viewed along the longitudinal direction of the piercing needle 10, the claw 220 constitutes a direction in which the claw 220 moves away from the piercing needle 10 (or the center 26 of the inscribed circle 25) and an arm 230 provided with the claw 220. It does not match the normal direction of the main surface of the elastic portion 31. As the distance between the two elastic portions 31 constituting the arm 230 increases, the angle formed by the moving direction of the claw 220 and the normal direction of the elastic portion 31 increases, and the elastic portion 31 is deformed in the moving direction of the claw 220. Requires greater power. Therefore, the arm 230a is relatively strong with respect to moving the claw 230a. The arm 230a is provided with a claw 220a closest to the puncture needle 10. This is advantageous in preventing the claw 220 (particularly the claw 220a) from being disengaged from the port 90 when a tensile force F is applied. This is because the claw 220a and the arm 230a mainly oppose the tensile force F. On the other hand, the relatively low strength of the

arms

230b and 230c facilitates the work of connecting the adapter 2 to the port 90.

The method of making the arm 230a stronger than the

arms

230b and 230c is not limited to the second embodiment and is arbitrary. For example, the arm 230a may be made relatively high in strength by increasing the cross-sectional area of the elastic portion 31 constituting the arm 230a, providing reinforcing ribs in the elastic portion 31 constituting the arm 230a, or the like. .. Unlike the second embodiment, in the present invention, all the arms 230 may have substantially the same strength.

Similar to the first embodiment, of the two elastic portions 31 constituting the

arms

230b and 230c, the elastic portion (first elastic portion) close to the puncture needle 10 may be configured with relatively high strength. ..

The

above embodiments

1 and 2 are merely examples. The present invention is not limited to the above-described first and second embodiments, and can be appropriately modified.

The number of claws and arms included in the adapter of the present invention is not limited to the above embodiment. The number of claws and arms is preferably two or more, and may be four or more.

The shape of the claw can be changed arbitrarily. For example, the tip 21 of the nail does not need to be provided with an arcuate recess along the inscribed circle 25 of the nail. The tip 21 of the nail may be provided with a flat surface or an arc-shaped or dome-shaped convex portion.

The shape of the claw locking plate 22 can be changed arbitrarily. Further, the locking plate 22 does not need to be inclined so as to approach the top plate 35 toward the tip 21. The locking plate 22 may be omitted, and the claws may be composed of ribs 23 parallel to each other in the vertical direction.

The number of ribs 23 provided on one claw is arbitrary. The shape of the rib 23 is also arbitrary. The claws may not have ribs 23.

Two or more claws may be provided on one arm.

A plurality of claws and a plurality of arms may be arranged at equal intervals with respect to the center 26 (that is, at equal intervals in the circumferential direction along the inscribed circle 25).

The shape of the arm can also be changed arbitrarily. For example, the arm need not be composed of two elastic portions 31 and one bridging portion 32 connecting the lower ends thereof. For example, the arm may not include a member corresponding to the cross-linked portion 32. The arm may consist of only one rod-shaped (or elongated plate-shaped) elastic portion extending in the vertical direction.

The shape of the top plate 35 is arbitrary. For example, the plan view shape of the top plate 35 is not limited to a circle, but may be an ellipse, a polygon (for example, a triangle, a quadrangle), or the like. The top plate 35 does not have to have the notch 37. The adapter of the present invention does not have to include the top plate 35. For example, the arm may extend from the base end of the puncture needle 10.

The horizontal position of the mixed injection port 40 is also arbitrary. For example, the mixed injection port 40 may be arranged coaxially with the puncture needle 10 or may be arranged concentrically with the inscribed circle 25. The mixed injection port 40 and the puncture needle 10 may be connected via a flexible tube.

The configuration of the mixed injection port 40 is not limited to the needleless port shown in the above embodiment. For example, the self-closing valve function may be realized by a configuration other than the septum 45. The mixed injection port does not have to have a self-closing valve function. For example, the mixed injection port may be a known connector (female connector) having a tapered surface. Any known mixed injection port can be applied to the adapter of the present invention.

In the above embodiment, only one flow path 12 through which the liquid flows is formed in the puncture needle 10, but in addition to the flow path through which the liquid flows, a flow in which a gas flows in order to prevent pressure fluctuation in the container. Roads may be formed.

In the above method of using the adapter, before connecting the adapter of the present invention to the port 90, the metal needle of the syringe was punctured into the rubber stopper 91 to prepare the drug solution in the infusion bag. However, the present invention is not limited to this. For example, the adapter may be connected to the port 90 without puncturing the rubber stopper 91 with a metal needle. After that, a predetermined drug or the like may be injected into the infusion bag via the adapter to prepare the drug solution.

The area to which the metal needle should be punctured and the area 93 to which the puncture needle should be punctured may not be displayed on the port to which the adapter of the present invention is connected.

The female connector to which the adapter of the present invention is connected is not limited to the port of the infusion bag. For example, the adapter of the present invention may be connected to the vial. Preferably, the female connector comprises a plug capable of piercing the piercing needle (eg, a rubber plug).

The liquid flowing through the flow path 12 of the puncture needle 10 may be a chemical solution, but may be any liquid other than the chemical solution.

The present invention is not limited, but can be preferably used in the medical field, especially in infusion. The adapter of the present invention can be preferably used as an adapter for connecting to a female connector of a container that stores a liquid (particularly a chemical solution).

1, 2, Adapter 10

Puncture needle

20, 220, 220a, 220b, 220c Claw 25 Claw inscribed circle 26 Center of inscribed

circle

30, 230, 230a, 230b, 230c Arm 35 Top plate 37

Notch

31, 31a, 31b Elastic part 40 Mixed injection port 90 port (female connector)

Claims

A puncture needle that can puncture the female connector,
A plurality of claws protruding toward the puncture needle so as to engage with the female connector when the puncture needle is punctured into the female connector.
A plurality of arms provided with the plurality of claws and elastically deformable so that the plurality of claws are separated from the puncture needle.
An adapter provided with a mixed injection port communicating with the puncture needle.
An adapter characterized in that the puncture needle is eccentric with respect to a circle inscribed in the plurality of nails when viewed along the longitudinal direction of the puncture needle.
The adapter according to claim 1, wherein the plurality of claws are unevenly arranged along the circle.
The adapter according to claim 1 or 2, wherein the plurality of claws and the plurality of arms are not arranged on the side where the center of the circle is located with respect to the puncture needle.
A top plate protruding outward is further provided at a position between the puncture needle and the mixed injection port.
The plurality of arms are provided on the top plate.
Any one of claims 1 to 3 in which a portion of the top plate on the side where the center of the circle is located is cut out when viewed along the longitudinal direction of the puncture needle. The adapter described in.
The adapter according to any one of claims 1 to 4, wherein the mixed injection port is eccentric to the circle on the same side as the puncture needle is eccentric to the circle.
The adapter according to claim 5, wherein the mixed injection port is eccentric to the circle even more than the puncture needle.
Each of the plurality of arms includes a first elastic portion and a second elastic portion extending substantially parallel to the puncture needle.
The claw is provided on the tip side of the first elastic portion and the second elastic portion.
The first elastic portion and the second elastic portion are arranged along a circle concentric with the circle.
The first elastic portion is arranged closer to the puncture needle than the second elastic portion.
The adapter according to any one of claims 1 to 6, wherein the first elastic portion has higher strength than the second elastic portion.
The adapter according to any one of claims 1 to 7, wherein the arm provided with the claw closest to the puncture needle among the plurality of claws has higher strength than the other arms.