Safety needle assembly

Abstract

To provide a safety needle assembly which punctures a subcutaneous implantation type port having high operability.SOLUTION: A safety needle assembly 1 includes: a needle 2 which has a needle tip 21 punctured on a subcutaneous implantation type port; a hub 4 communicating between the needle 2 and a tube 3; a body part 5 having a housing space 5S housing the hub 4 and an opposing surface 5F directed to the body surface of a patient; a buffer material 100 provided on the opposing surface 5F; and an adhesion layer 110 provided between the opposing surface 5F and the buffer material 100. An outer peripheral edge 110L of an adhesion layer 110 is located offset inside an outer peripheral edge 100L of the buffer material 100.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a safety needle assembly for insertion into and placement in a subcutaneously implantable port. [Background technology]

[0002] One method for administering a medicinal liquid to a blood vessel is known to use a port. In this method, a port is embedded subcutaneously in advance, and the embedded port is connected to a blood vessel via a catheter. The administering person then administers the medicinal liquid by inserting a safety needle assembly into the embedded port from outside the body. For example, the safety needle device of Patent Document 1 is known as one such safety needle assembly. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4381808 Summary of the Invention [Problem to be solved by the invention]

[0004] In the safety needle device (2) of Patent Document 1, in order to reduce the burden on the skin during long-term indwelling, a foam pad (8) is attached by adhesion to the bottom surface (6) of the base (4) so ​​that the device can be placed flat against the patient's skin (see Figures 1 and 2 of Patent Document 1, etc.). Here, the safety needle device of Patent Document 1 does not specify the range over which the adhesive of the foam pad is provided, but a corresponding product is on the market, and when we checked it, we found that the adhesive is provided over the entire contact surface of the foam pad. In addition, various companies sell products of safety needle devices that are inserted into such embedded ports, and all of them have adhesive provided over the entire contact surface of the foam pad.

[0005] However, when the device is held with the fingertips in contact with the end faces of the base and the foam pad, adhesive seeps out from between the base and the foam pad and adheres to the fingers, which can cause stickiness and impair subsequent operability.

[0006] In view of the above circumstances, an object of the present disclosure is to provide a safety needle assembly that imposes less strain on the patient's skin and does not impair operability. [Means for solving the problem]

[0007] The safety needle assembly according to a first aspect of the present disclosure comprises a needle having a tip to be inserted into a subcutaneously implantable port, a hub communicating between the needle and a tube, a main body having an opposing surface facing the patient's body surface, a cushioning material provided on the opposing surface, and an adhesive layer provided between the opposing surface and the cushioning material, wherein the outer peripheral edge of the adhesive layer is offset inwardly from the outer peripheral edge of the cushioning material.

[0008] As a result, the outer periphery of the adhesive layer is not exposed to the outside, aligned with the end face of the cushioning material, and therefore even if the safety needle assembly is grasped with the fingertips touching the end face of the cushioning material, the fingertips do not come into contact with the adhesive layer, improving operability.

[0009] A safety needle assembly according to a second aspect of the present disclosure is such that, in the first aspect, the main body has a plate-shaped base portion having an underside that forms part of the opposing surface, and a pair of wing portions hingedly connected to the base portion, extending to both sides from the base portion, and having undersides that form the remainder of the opposing surface, and at least at the lateral ends of the wing portions, the outer peripheral edge of the adhesive layer may be offset inwardly from the outer peripheral edge of the cushioning material.

[0010] This allows the left and right wings to be folded so as to align with the cover and grip the safety needle assembly. When the wings are folded in this manner, the cushioning material on the underside of the wings is likely to become misaligned, but because the adhesive layer is offset, it is possible to prevent the adhesive layer from becoming exposed.

[0011] A safety needle assembly according to a third aspect of the present disclosure may be such that, in the second aspect, the offset amount, which is the dimension by which the outer edge of the adhesive layer is offset inwardly from the outer edge of the cushioning material, is greater at the side ends of the wing portions than at the side ends of the base portion.

[0012] When the wings are folded as described above, the cushioning material on the underside of the wings is prone to misalignment, particularly at the side ends of the wings. By setting the offset at the side ends of the wings to be large as described above, it is possible to reliably prevent the adhesive layer from being exposed even when the wings are folded.

[0013] The safety needle assembly according to a fourth aspect of the present disclosure may be such that, in the third aspect, the offset amount at the lateral ends of the wing portions increases toward a central position in the front-rear direction.

[0014] This makes it possible to more reliably prevent the adhesive layer from being exposed in areas that are likely to be touched by fingertips when gripping the wing portion.

[0015] In the safety needle assembly according to the fifth aspect of the present disclosure, in the second aspect, the lateral end of the adhesive layer provided on the underside of the wing portion may have an outer peripheral edge extending linearly in the front-to-rear direction.

[0016] This allows the base and the cushioning material to be bonded over a wide area in the direction perpendicular to the folding direction of the wing, which makes it difficult for the cushioning material to shift position relative to the base when the wing is folded, and prevents the adhesive layer from becoming exposed.

[0017] A safety needle assembly according to a sixth aspect of the present disclosure is the third aspect, wherein a hinge portion is provided at the base end portion of the wing portion, the hinge portion being formed by a thin-walled portion extending in the front-to-rear direction and having a thickness dimension smaller than that of the surrounding area, and the maximum value of the offset amount of the adhesive layer provided on the underside of the wing portion may be equal to or greater than the width dimension of the hinge portion.

[0018] In this way, by ensuring an offset amount equal to or greater than the width dimension of the hinge portion, which is the movable portion when the wing portion is folded, exposure of the adhesive layer can be more reliably prevented.

[0019] A safety needle assembly according to a seventh aspect of the present disclosure, in a second aspect, has an opening penetrating the base portion, the adhesive layer and the cushioning material at a position forward of the center of the base portion in the fore-aft direction to allow the needle to pass in the vertical direction, and the cushioning material may be provided at the center of the base portion in the fore-aft direction from one side end to the other side end.

[0020] This allows the cushioning material to face the flange portion around the septum of the port when the port is punctured, thereby reducing the burden on the patient.

[0021] In the second aspect of the safety needle assembly according to the eighth aspect of the present disclosure, an opening is formed in the base portion that penetrates the base portion, the adhesive layer, and the cushioning material so that the needle can pass in an up-down direction, and on the opposing surface of the main body, at a portion where a virtual line in the fore-aft direction passing through the opening is located, the area of ​​the opening may be smaller than the area where the cushioning material is provided.

[0022] This allows a larger area to be provided with the cushioning material, reducing the burden on the patient. Also, the space inside the opening is prone to condensation due to air accumulating therein, but the above-mentioned structure makes it possible to reduce the size of the opening, thereby suppressing the occurrence of condensation.

[0023] A safety needle assembly according to a ninth aspect of the present disclosure comprises a needle having a tip to be inserted into a subcutaneously implantable port, a hub communicating between the needle and a tube, a main body having an opposing surface facing the patient's body surface, a cushioning material provided on the opposing surface, and an adhesive layer provided between the opposing surface and the cushioning material, wherein the main body has a plate-shaped base having an underside that forms part of the opposing surface, and a pair of wing portions hingedly connected to the base portion, extending to both sides from the base portion and having undersides that form the remainder of the opposing surface, and the cushioning material is divided into an area corresponding to the underside of the base portion and an area corresponding to the underside of the wing portions.

[0024] This makes it difficult for the cushioning material to become misaligned when the wing portions are folded, and therefore it is possible to prevent the adhesive layer from being exposed along the edge faces of the cushioning material, thereby improving operability.

[0025] A safety needle assembly according to a tenth aspect of the present disclosure comprises a needle having a tip to be inserted into a subcutaneously implantable port, a hub communicating between the needle and a tube, a main body having an opposing surface facing the patient's body surface, a cushioning material provided on the opposing surface, and an adhesive layer provided between the opposing surface and the cushioning material, wherein the main body has a plate-shaped base having an underside that forms part of the opposing surface, and a pair of wing portions hingedly connected to the base portion, extending to both sides from the base portion and having undersides that form the remainder of the opposing surface, and the outer peripheral edge of the cushioning material is offset inward from the outer peripheral edges of the wing portions.

[0026] This prevents the adhesive layer from being exposed alongside the end face of the base, and therefore improves operability because even when the safety needle assembly is grasped with the fingertips touching the end face of the base, the fingertips do not come into contact with the adhesive layer. Effect of the Invention

[0027] According to the present disclosure, it is possible to provide a safety needle assembly that is inserted into and placed in a subcutaneously implantable port and has high operability. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a perspective view showing the configuration of a safety needle assembly. [Diagram 2] FIG. 2 is a cross-sectional view of the safety needle assembly. [Diagram 3] FIG. 3 is a cross-sectional view of the safety needle assembly showing a configuration without the adhesive layer and cushioning material. [Figure 4] FIG. 4 is a rear view diagrammatically illustrating the configuration of the safety needle assembly. [Diagram 5] FIG. 5 is a schematic rear view of a safety needle assembly showing a configuration according to the first modified example. [Figure 6] FIG. 6 is a schematic rear view of a safety needle assembly showing a configuration according to Modification 2. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, a safety needle assembly according to an embodiment of the present disclosure will be described with reference to the drawings. Note that the safety needle assembly described in the following embodiment is merely one example of the present disclosure. Therefore, the present disclosure is not limited to the following embodiment, and additions, deletions, or modifications of the configuration are possible within the scope of the disclosure.

[0030] The safety needle assembly of this embodiment is used to inject a medicinal liquid or the like into a patient's blood vessel by inserting a needle from outside the body through the skin into a silicone septum of a CV port that has been previously embedded under the patient's skin.

[0031] [Overall composition] As shown in Figures 1 to 3, the safety needle assembly 1 comprises a needle 2 having a needle tip 21 to be inserted into a subcutaneously implanted port, and a hub 4 that communicates between the needle 2 and a tube 3. The safety needle assembly 1 also comprises a main body 5. The main body 5 has an accommodation space 5S for accommodating the hub 4, and an opposing surface 5F that faces the body surface of the patient. The hub 4 is cylindrical, and is provided with its axis 4A parallel to the opposing surface 5F.

[0032] The concept of directions used in the following description is as follows. That is, the direction in which the opposing surface 5F of the main body 5 faces is defined as downward, and the opposite direction is defined as upward. The direction along the axis 4A of the hub 4 is defined as the front-rear direction, the side where the needle 2 is connected to the hub 4 is defined as the front, and the side where the tube 3 is connected to the hub 4 is defined as the rear. Furthermore, the direction perpendicular to both the above-mentioned up-down direction and front-rear direction is defined as the left-right direction (side), and the left and right are defined based on the forward direction in particular. However, such a concept of directions is provided for the convenience of explanation in this embodiment, and does not limit the configuration or arrangement of the safety needle assembly according to the present disclosure.

[0033] As shown in Fig. 1, the main body 5 has a plate-shaped base 6, a cover 7 that is placed on the base 6, and a pair of wings 8 that extend to the left and right sides from the base 6. The base 6 has a rectangular shape that is long in the front-rear direction, and the contour of the rear end is an arc. As shown in Fig. 3, the lower surface 6d of the base 6 forms a part of the above-mentioned facing surface 5F that faces the patient's body surface. In addition, an opening 61 through which the needle 2 passes is formed in the front of the base 6.

[0034] Wing portions 8 extend from both sides on the front side of the base portion 6. The left and right wing portions 8 have the same configuration, so only one of the wing portions 8 will be described. The wing portion 8 is hinged to the base portion 6 by a hinge portion 81, and can be bent when a person applies an external force with their fingertips.

[0035] More specifically, the wing 8 has a rectangular base end portion 82 close to the base 6 and a semicircular tip end portion 83 far from the base 6, and the dimensions in the front-rear and left-right directions are generally the same. In other words, the wing 8 has a shape like a substantially square plate member with two adjacent corners rounded into an arc.

[0036] The outer peripheral edges of the wing 8, i.e., the front edge 8a, the rear edge 8b, and the side edges 8c, are chamfered and rounded at the connection points with the upper surface 8u and the lower surface 8d. A recess 84 is formed in the upper surface 8u of the wing 8, particularly in the upper surface 8u of the tip portion 83 of the wing 8. This recess 84 has a rectangular shape that is long in the front-to-rear direction in a plan view, and has a depth that is more than half the thickness of the tip portion 83.

[0037] The above-mentioned hinge portion 81 is formed at the base end of the base end portion 82. The hinge portion 81 is a thin portion having a smaller thickness than the surrounding area, such as other areas of the base end portion 82, and extends in the front-rear direction along the side of the base portion 6.

[0038] 3, the hinge portion 81 has an upper groove 81u recessed downward from the upper surface 8u of the wing portion 8, and a lower groove 81d recessed upward from the lower surface 8d of the wing portion 8. The upper groove 81u and the lower groove 81d are located at positions corresponding to each other in a plan view, and the portion of the hinge portion 81 with the smallest thickness is, for example, half or less than half of the other portions of the base end portion 82. Thus, the wing portion 8 can be bent from the hinge portion 81 extending along the front-rear direction as a starting point so that the upper surface 8u is bent from a state along the horizontal direction to a state along the vertical direction.

[0039] The lower surface 8d of the wing portion 8 forms the remainder of the above-mentioned facing surface 5F that faces the patient's body surface. That is, the facing surface 5F is composed of the lower surface 6d of the base portion 6 and the lower surface 8d of the wing portion 8. In the hinge portion 81 of the wing portion 8, the lower groove 81d has a width dimension D1.

[0040] The cover part 7 covering the upper surface 6u of the base part 6 has a holder 71 that holds the hub 4, a guide wall 72 that guides the holder 71 to the base part 6, and an operating part 73 that is operated when separating the holder 71 from the base part 6.

[0041] The holder 71 has a generally rectangular parallelepiped shape that is long in the front-rear direction, and has an opening 71a in its inclined front portion. The holder 71 holds a cylindrical hub 4. That is, an engagement hole 71b is provided in a side wall of the holder 71, penetrating from the inside to the outside, and an engagement protrusion 4a is provided on the hub 4, protruding laterally. The hub 4 is held within the holder 71 by the engagement between the engagement hole 71b and the engagement protrusion 4a.

[0042] A needle connection part is formed at the front end of the hub 4, and a tube connection part 41 is formed at the rear end of the hub 4. The needle 2 is a hollow needle made of, for example, stainless steel or a hard synthetic resin material, and its base end is connected to the needle connection part of the hub 4 by adhesion or the like. The needle 2 extends forward from the needle connection part of the hub 4, bends midway, and extends downward. The part of the needle 2 that extends downward passes through an opening 61 of the base part 6 and extends downward. The opening surface 21a of the needle tip 21 of the needle 2 is formed parallel to the puncture direction (up and down direction) to avoid coring when puncturing the septum, which is a silicon port of the subcutaneously implantable port. In addition, when an inner needle is inserted separately inside the needle 2, the needle 2 is formed of a synthetic resin material with a non-sharp cutting edge, and the opening surface of the needle tip is formed in the axial direction perpendicular to the puncture direction.

[0043] Furthermore, a tube 42 is connected to the tube connection portion 41 of the hub 4. This allows the inner hole of the needle 2 and the inner hole of the tube 42 to communicate through the inner hole of the hub 4. Furthermore, the hub 4 is held within the holder 71 with the needle 2 and the tube 42 connected in this manner.

[0044] The holder 71 has an outer wall formed with a protruding portion 71c that protrudes outward. The protruding portion 71c has a rectangular shape that is long in the front-rear direction in a side view. When the wing portion 8 is folded, the protruding portion 71c fits into the recessed portion 84 of the wing portion 8. The holder 71 also has an outer wall formed with a three-dimensional portion 71d that is uneven with respect to the side wall surface. The three-dimensional portion 71d is located below the protruding portion 71c, and the dimension of the protruding portion 71d that protrudes or is recessed from the side wall surface is smaller than that of the protruding portion 71c. In this embodiment, the three-dimensional portion 71d is formed by embossing characters or symbols that indicate information about the safety needle assembly 1.

[0045] The guide wall 72 is composed of a pair of left and right walls erected on the upper surface 6u of the base portion 6. The holder 71 is placed at a predetermined position on the base portion 6 so as to be sandwiched between the pair of guide walls 72. Although not shown, a locking structure is provided between the hub 4 and the base portion 6. For example, a locking hole may be provided at a predetermined position on the upper surface 6u of the base portion 6, and a locking claw protruding downward may be provided on the lower portion of the hub 4, so that the locking hole and the locking claw engage with each other. As a result, the hub 4 in the holder 71 is locked to the base portion 6 with the holder 71 positioned by the guide walls 72.

[0046] The operating part 73 is in the form of a rectangular plate long in the front-rear direction, and its front end is hinged to the front end of the upper surface of the holder 71. The operating part 73 is fitted into the upper part of the holder 71, and when in use, the rear end is grasped and pulled upward, so that it can be erected from the front end. Such an operating part 73 is operated when removing the safety needle assembly 1. That is, when removing the safety needle assembly 1 with the needle 2 inserted into the patient's body, the rear end of the operating part 73 is grasped and pulled upward while holding the upper surface 8u of the wing 8. Then, the holder 71 is detached from the base part 6, and the operating part 73, the holder 71, the hub 4, and the needle 2 are removed together.

[0047] The needle tip 21 of the removed needle 2 is surrounded and protected by a needle tip protection part 9. This needle tip protection part 9 is housed in the front part of the holder 71 with a part of it exposed and visible through the opening 71a.

[0048] Such a safety needle assembly 1 is provided with a cushioning material 100 on the opposing surface 5F of the main body 5, i.e., the underside 6d of the base 6 and the undersides 8d of the pair of left and right wing portions 8, for mitigating the effects of stress on the patient's body surface during use (particularly when the safety needle device 1 is left indwelling for a long period of time). This cushioning material 100 is made of, for example, a synthetic resin foam. In addition, an adhesive layer 110 is provided between the opposing surface 5F and the cushioning material 100 to bond them together. The adhesive layer 110 can be made of various resin-based adhesives, double-sided tape with adhesive applied to both sides of a sheet, or the like.

[0049] [How to use] The safety needle assembly 1 described above is used as follows. First, a medicinal liquid line is connected to the tube 3, and after priming the needle 2 and tube 3 with medicinal liquid, the tube 3 is clamped. Next, the puncture site where the port is embedded in the patient is disinfected, and the needle 2 is inserted perpendicularly to the septum of the port. The clamp is then released, and the medicinal liquid is administered. The safety needle assembly 1 can be used for administering medicinal liquid and for blood transfusions in this way, and can also be used for drawing blood from a port.

[0050] When inserting the safety needle assembly 1 into a patient, the practitioner grasps the safety needle assembly 1 as follows. That is, the left and right wings 8 are bent upright starting from the hinge portion 81, and in this state, the wing portion 8 is pinched and grasped with two fingers from the left and right. At this time, the practitioner's fingertips contact the wing portion 8 and the side end surface of the cushioning material 100 below it. Therefore, if the fingertips touch the adhesive layer 110 between the wing portion 8 and the cushioning material 100 during treatment, the adhesiveness of the adhesive layer 110 may cause poor operability. However, the safety needle assembly 1 according to the present disclosure is configured so that the adhesive layer 110 is less likely to come into contact with the fingertips of the practitioner. This configuration will be described next.

[0051] [Offset mode] Fig. 4 is a rear view of the safety needle assembly 1, and is a schematic diagram for particularly illustrating the range of the opposing surface 5F, the cushioning material 100, and the adhesive layer 110. As shown in Fig. 4, the outer peripheral edge 100L of the cushioning material 100 and the outer peripheral edge 5L of the opposing surface 5F are almost coincident. On the other hand, the outer peripheral edge 110L of the adhesive layer 110 is offset inward from the outer peripheral edge 100L of the cushioning material 100. In the example of Fig. 4, the outer peripheral edge 110L of the adhesive layer 110 is offset inward from the outer peripheral edge 100L of the cushioning material 100 over the entire range.

[0052] In the case of the safety needle assembly 1 of this embodiment, the offset amount, which is the dimension by which the outer periphery 110L of the adhesive layer 110 is offset inward from the outer periphery 100L of the cushioning material 100, varies depending on the location. Specifically, the offset amount is set to be larger at the side ends of the wings 8 than at the base 6. For example, as shown in Fig. 4, the offset amount at the base 6 is a substantially constant dimension D2 over the entire area rearward of the wings 8, that is, at the side ends and rear ends of the base 6 rearward of the wings 8. In contrast, the offset amount at the side ends of the wings 8 is a dimension D3 that is clearly larger than dimension D2.

[0053] In this way, since the adhesive layer 110 is offset inward from the cushioning material 100, the adhesive layer 110 is difficult to touch with the fingertips. Moreover, in the example of Fig. 4, the adhesive layer 110 is offset over the entire range of the outer circumferential edge 110L, and the offset amount is set to be larger at the side ends of the wing portions 8 than at the base portion 6. Therefore, the adhesive layer 110 is difficult to touch with the fingertips no matter which end faces of the base portion 6 and the wing portions 8 the fingertips touch, and the adhesive layer 110 is even more difficult to touch with the fingertips at the side ends of the wing portions 8 where the fingertips are most likely to touch when gripping the product.

[0054] 4, the offset amount D3 at the side end of the wing 8 increases toward the center in the front-to-rear direction. In other words, at the side end of the wing 8, the offset amount D31 at the center in the front-to-rear direction is greater than the offset amount D32 at the front-to-rear direction and the offset amount D33 at the rear. This more reliably prevents the adhesive layer 110 from being exposed in areas that are likely to be touched by fingertips when gripping the wing 8.

[0055] Furthermore, the safety needle assembly 1 according to this embodiment is provided with wings 8 that can be folded at hinge portions 81, and the relationship between the width dimension D1 of this hinge portion 81 (more specifically, the width dimension D1 of the lower groove 81d of the hinge portion 81) and the maximum offset amount of the adhesive layer 110 provided on the lower surface 8d of the wings 8 (offset amount D31 in FIG. 4) is D1≦D31. This ensures that an offset amount equal to or greater than the width dimension of the hinge portion 81, which is the movable portion when folding the wings 8, is secured at the side ends of the wings 8. This makes it possible to reliably prevent the adhesive layer 110 from being exposed when the wings 8 are folded and gripped.

[0056] Also, a linear outer peripheral edge 110a is provided at the lateral end of adhesive layer 110 provided on lower surface 8d of wing 8. This linear outer peripheral edge 110a is an outer peripheral edge that extends linearly along the front-rear direction parallel to hinge portion 81, and extends perpendicular to the direction in which wing 8 is folded (upward). Therefore, base portion 6 and cushioning material 100 are bonded over a wide range in the direction perpendicular to the folding direction of wing 8. Therefore, when wing 8 is folded, cushioning material 100 is unlikely to shift position relative to base portion 6, and exposure of adhesive layer 110 is prevented.

[0057] As already described, the base portion 6 of the safety needle assembly 1 has an opening 61 formed therein. The cushioning material 100 and the adhesive layer 110 also have openings 100b, 110b whose position and shape are identical to those of the opening 61. These openings 61, 100b, 110b overlap to form an opening 120 through which the needle 2 passes in the vertical direction. As shown in FIG. 4, the opening 120 is provided closer to the front than the center of the base portion 6 in the front-rear direction. The cushioning material 100 is provided at the center of the base portion 6 in the front-rear direction, from one side end to the other side end.

[0058] With this configuration, the cushioning material 100 is located on the portion of the opposing surface 5F of the safety needle assembly 1 that faces the flange around the septum of the subcutaneously implantable port. Therefore, the cushioning material 100 comes into contact with the body surface of the part of the human body that is sandwiched between the flange and the safety needle assembly 1, thereby reducing the burden on the patient.

[0059] Furthermore, in the safety needle assembly 1, the opening 120 is provided in a limited area as small as possible. For example, in the configuration of Fig. 4, in a portion on the facing surface 5F where a virtual line 120A in the front-rear direction passing through the opening 120 is located, the area of ​​the opening 120 is smaller than the area where the cushioning material 100 is provided. In other words, when a virtual line 120A in the front-rear direction passing through the opening 120 is set and the area on the facing surface 5F is viewed along this virtual line 120A, the area of ​​the opening 120 is smaller than the area where the cushioning material 100 is provided.

[0060] In this way, a wide area is secured for the installation of the cushioning material 100, while the area of ​​the opening 120 where the cushioning material 100 is not installed is limited to a small area. This reduces the burden on the patient by allowing the body surface to come into contact with the cushioning material 100 widely, and also prevents moisture contained in the air inside the opening 120 from condensing and causing the condensed water to accumulate around the needle 2.

[0061] 4, the entire outer periphery 110L of the adhesive layer 110 is offset inward from the outer periphery 100L of the cushioning material 100, but the present invention is not limited to this. For example, only the portions corresponding to the wing portions 8 (particularly, only the side ends of the wing portions 8) may be offset, and the other portions may not be offset, so that the adhesive layer 110 is partially offset.

[0062] (Variation 1) In order to make it difficult for the adhesive layer 110 to come into contact with the fingertips during treatment, the following configuration according to Modification 1 can also be applied. Fig. 5 is a schematic rear view of the safety needle assembly 1 showing the configuration according to Modification 1. The configuration shown in Fig. 5 differs from the configuration shown in Fig. 4 in that the cushioning material 100 is divided into an area corresponding to the lower surface 6d of the base portion 6 and an area corresponding to the lower surfaces 8d of the left and right wing portions 8. The other configurations are the same as those shown in Fig. 4.

[0063] 5, the cushioning material 100 is composed of three cushioning materials 101, 102, and 103. Of these, the cushioning material 101 is adhered to the lower surface 6d of the base portion 6, the cushioning material 102 is adhered to the lower surface 8d of the left wing portion 8, and the cushioning material 103 is adhered to the lower surface 8d of the right wing portion 8. The cushioning materials 101 and 102 are separated from each other, and the boundary line 102a between them coincides with the hinge portion 81 in a plan view. Similarly, the cushioning materials 101 and 103 are separated from each other, and the boundary line 103a between them coincides with the hinge portion 81 in a plan view.

[0064] As a result, when the wing portion 8 is folded, the cushioning materials 102, 103 corresponding to the wing portion 8 are less likely to become misaligned. This makes it possible to prevent the adhesive layer 110 from being exposed next to the end face of the cushioning material 100, improving operability. When dividing the cushioning material 100 in this manner, it is not necessary to offset the outer peripheral edge 110L of the adhesive layer 110 inward relative to the outer peripheral edge 100L of the cushioning material 100. Alternatively, the offset amount can be made smaller than in the example of FIG. 4.

[0065] The cushioning material 101 and the cushioning material 102 may be completely separated or may be partially connected. For example, the boundary line 102a between the cushioning material 101 and the cushioning material 102 may be made thinner than the other parts. In that case, it is preferable that the cushioning material 101 and the cushioning material 102 are connected at the upper part of the boundary line 102a close to the adhesive layer 110, and are separated from each other at the lower part far from the adhesive layer 110. The separation of the cushioning material 101 and the cushioning material 103 is similar to that described above.

[0066] In addition, in the first modification, the adhesive layer 110 does not need to be divided, but similar to the divided aspect of the cushioning material 100, the adhesive layer 110 may also be divided into three.

[0067] 5 illustrates an example in which the positions of the boundary lines 102a, 103a of the cushioning material coincide with the position of the hinge portion 81, but the present invention is not limited to this. For example, the boundary line 102a may be located further to the left of the left hinge portion 81, and similarly, the boundary line 103a may be located further to the right of the right hinge portion 81. In this case as well, the cushioning materials 102, 103 are less likely to shift position when the wing portion 8 is folded, and therefore the same effect as above can be achieved.

[0068] Furthermore, when the cushioning material 100 and the adhesive layer 110 are divided, the "periphery 100L of the cushioning material 100" and the "periphery 110L of the adhesive layer 110" do not mean the entire range of the peripheral edges of each of the divided cushioning materials or adhesive layers. In other words, they refer to the peripheral edges of the cushioning material 100 (cushioning materials 101, 102, 103) when viewed as a whole, and the peripheral edges of the adhesive layer 110 when viewed as a whole. Therefore, for example, in the case of the configuration of FIG. 5, there is no need to set an offset at the boundary between the cushioning material 101 and the cushioning material 102, or at the boundary between the cushioning material 101 and the cushioning material 103.

[0069] (Variation 2) Fig. 6 is a schematic rear view of the safety needle assembly 1 showing the configuration according to the modified example 2. The configuration shown in Fig. 6 is different from the configuration shown in Fig. 4 in that the outer peripheral edge 100L of the cushioning material 100 is offset inward from the outer peripheral edge 5L of the opposing surface 5F. That is, the portion of the outer peripheral edge 100L of the cushioning material 100 corresponding to the wing portion 8 is offset inward from the portion of the outer peripheral edge 5L of the opposing surface 5F corresponding to the wing portion 8, and the portion of the outer peripheral edge 100L of the cushioning material 100 corresponding to the base portion 6 is offset inward from the portion of the outer peripheral edge 5L of the opposing surface 5F corresponding to the base portion 6. The other configurations are the same as those shown in Fig. 4.

[0070] As a result, for example, the adhesive surface between the wing portion 8 and the cushioning material 100 is located in a concave corner portion sandwiched between the underside 8d of the wing portion 8 (i.e., the opposing surface 5F) and the side end face of the cushioning material 100, making it difficult for fingertips to reach and touch the adhesive layer 110.

[0071] 6 shows a configuration in which the entire outer periphery 100L of the cushioning material 100 is offset from the outer periphery 5L of the opposing surface 5F, but this is not limited thereto. For example, the outer periphery 100L of the cushioning material 100 may be offset from the outer periphery 5L of the opposing surface 5F only in the wing portions 8 that are particularly likely to be touched by fingertips.

[0072] 6, the outer peripheral edge 110L of the adhesive layer 110 is offset inward from the outer peripheral edge 100L of the cushioning material 100 over the entire range, similar to the configuration of FIG. 4, but is not limited to this. For example, the outer peripheral edge 110L may be offset partially, such as by offsetting only the portion corresponding to the wing portion 8. Alternatively, the outer peripheral edge 100L of the cushioning material 100 and the outer peripheral edge 110L of the adhesive layer 110 may be aligned without being offset over the entire range. Even in this case, by offsetting the outer peripheral edge 100L of the cushioning material 100 with respect to the outer peripheral edge 5L of the facing surface 5F, it is possible to prevent the fingertips from touching the adhesive layer 110. [Industrial Applicability]

[0073] The present disclosure can be suitably applied to a safety needle assembly that is inserted into and placed in a subcutaneously implantable port. [Explanation of symbols]

[0074] 1 Safety needle assembly 2 needles 3 Tubes 4. Hub 5 Main body 5F Opposite side 5S Storage Space 6 Base 7 Cover 8 Wings 21 Needle tip 81 Hinge part 100 Cushioning material 110 Adhesive layer 110a Straight outer edge 120 aperture

Claims

1. a needle having a tip adapted to be inserted into the subcutaneously implantable port; a hub communicating between the needle and the tube; a main body portion having a facing surface facing a body surface of a patient; A cushioning material provided on the opposing surface; an adhesive layer provided between the opposing surface and the cushioning material; The outer periphery of the adhesive layer is offset inward from the outer periphery of the cushioning material. Safety needle assembly.

2. The main body portion has a plate-shaped base portion having a lower surface that forms a part of the opposing surface, and a pair of wing portions that are hinged to the base portion, extend from the base portion to both sides, and have lower surfaces that form the remainder of the opposing surface, and at least at the lateral ends of the wing portions, an outer periphery of the adhesive layer is offset inward from an outer periphery of the cushioning material.

2. The safety needle assembly of claim 1.

3. an offset amount, which is a dimension by which an outer periphery of the adhesive layer is offset inwardly from an outer periphery of the cushioning material, is larger at the side ends of the wing portions than at the side ends of the base portion; 3. The safety needle assembly of claim 2.

4. The offset amount at the lateral end of the wing portion becomes larger toward the center position in the front-rear direction.

4. The safety needle assembly of claim 3.

5. The lateral end of the adhesive layer provided on the lower surface of the wing portion has an outer peripheral edge extending linearly in the front-rear direction.

3. The safety needle assembly of claim 2.

6. A hinge portion is provided at the base end portion of the wing portion, the hinge portion being formed by extending a thin portion having a thickness smaller than that of the periphery in the front-rear direction, and the maximum value of the offset amount of the adhesive layer provided on the underside of the wing portion is equal to or greater than the width dimension of the hinge portion.

4. The safety needle assembly of claim 3.

7. an opening is formed in the base portion at a position closer to the front than the center in the front-rear direction, the opening penetrating the base portion, the adhesive layer, and the cushioning material so that the needle can pass through in the up-down direction; The cushioning material is provided at a central position in the front-rear direction of the base portion from one side end to the other side end.

3. The safety needle assembly of claim 2.

8. an opening is formed in the base portion, the adhesive layer, and the cushioning material so that the needle can pass through in a vertical direction; On the opposing surface of the main body, in a portion where a virtual line in the front-rear direction passing through the opening is located, an area of ​​the opening is smaller than an area where the cushioning material is provided.

3. The safety needle assembly of claim 2.

9. a needle having a tip adapted to be inserted into the subcutaneously implantable port; a hub communicating between the needle and the tube; a main body portion having a facing surface facing a body surface of a patient; A cushioning material provided on the opposing surface; an adhesive layer provided between the opposing surface and the cushioning material; the main body portion has a plate-shaped base portion having a lower surface that forms a part of the opposing surface, and a pair of wing portions that are hinged to the base portion, extend from the base portion to both sides, and have lower surfaces that form the remainder of the opposing surface, The cushioning material is divided into an area corresponding to the lower surface of the base portion and an area corresponding to the lower surface of the wing portion. Safety needle assembly.

10. a needle having a tip adapted to be inserted into the subcutaneously implantable port; a hub communicating between the needle and the tube; a main body portion having a facing surface facing a body surface of a patient; A cushioning material provided on the opposing surface; an adhesive layer provided between the opposing surface and the cushioning material; the main body portion has a plate-shaped base portion having a lower surface that forms a part of the opposing surface, and a pair of wing portions that are hinged to the base portion, extend from the base portion to both sides, and have lower surfaces that form the remainder of the opposing surface, The outer periphery of the cushioning material is offset inward from the outer periphery of the wing portion. Safety needle assembly.

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