Liquid Injection Port

Abstract

To provide a liquid injection port system that allows a position of a liquid injection port to be recognized from the outside of a body.SOLUTION: A liquid injection port 100 is placed while being embedded in a body, and comprises a housing part 10 comprising a concave part 52 constituting a liquid reservoir part 50 for temporarily reserving liquid supplied from the outside of the body, a plug body 20 closing an opening 56 of the concave part 52, a liquid introduction connector (connector part 36) communicating with the liquid reservoir part 50, and to be connected to a catheter, and a light emitting part 91. The plug body 20 is made of an optically transparent resin material. The light emitting part 91 emits light, and thereby the light passes through the inside of the plug body 20, and is emitted from an upper surface of the plug body 20.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a liquid injection port. [Background technology]

[0002] There is known a liquid injection port that is implanted and left in the body. The liquid injection port has an internal liquid reservoir that temporarily stores liquid supplied from outside the body. When a needle for supplying liquid is inserted into the liquid reservoir from outside the body and liquid is supplied to the liquid reservoir, the liquid is introduced into a catheter via a liquid introduction connector and is supplied from the catheter to a desired location in the body. Such a liquid injection port is described in, for example, Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-10563 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present inventors have recognized that there is a need for recognizing the position of a liquid injection port from outside the body.

[0005] The present invention has been made in consideration of the above problems, and provides a liquid injection port whose position can be recognized from outside the body. [Means for solving the problem]

[0006] The present invention provides a liquid injection port that is implanted in the body and left indwelling, a housing portion having a recess that constitutes a liquid reservoir portion for temporarily storing liquid supplied from outside the body; A plug closing the opening of the recess; a liquid introduction connector that communicates with the liquid reservoir and is connected to a catheter; A light emitting portion; Equipped with The plug is made of a light-transmitting resin material, and when the light-emitting portion emits light, the light passes through the inside of the plug and is emitted from the upper surface of the plug. R, The light emitting portion is embedded in the housing portion, The housing portion has a light-transmitting portion, Light from the light emitting portion reaches the plug through the transmission portion. A liquid injection port is provided. Effect of the Invention

[0007] According to the present invention, it is possible to recognize the position of the liquid injection port from outside the body. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of a liquid injection port according to the first embodiment. [Diagram 2] FIG. 2 is a plan view of the liquid injection port according to the first embodiment. [Diagram 3] FIG. 2 is a side cross-sectional view of the liquid injection port according to the first embodiment. [Figure 4] FIG. 11 is a side cross-sectional view of a liquid injection port according to a first modified example of the first embodiment. [Diagram 5] FIG. 5(a) is a side cross-sectional view of a liquid injection port according to Modification 2 of the first embodiment, and FIG. 5(b) is a partial enlarged view of portion A shown in FIG. 5(a). [Figure 6] 13 is a side cross-sectional view of a liquid injection port according to a third modified example of the first embodiment. FIG. [Figure 7] FIG. 11 is a side cross-sectional view of a liquid injection port according to a second embodiment. [Figure 8] FIG. 11 is a side cross-sectional view of a liquid injection port according to a modified example of the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In all drawings, the same components are given the same reference numerals, and the description will be omitted as appropriate. In the following description, the upper and lower sides refer to the top side (upper side in FIG. 3) and bottom side (lower side in FIG. 3) of the liquid injection port 100. In addition, the annular shape refers to a shape (circular, rectangular, etc.) that surrounds a certain area when viewed from above or below, or a shape (C-shaped, U-shaped, etc.) that surrounds a certain area and has a partially missing outline.

[0010] As shown in any one of Figures 1 to 3, the liquid injection port 100 is a liquid injection port that is left implanted in the body, and comprises a housing portion 10 having a recess 52 that forms a liquid reservoir 50 for temporarily storing liquid supplied from outside the body, a stopper body 20 that blocks the opening 56 of the recess 52, a liquid introduction connector (connector portion 36) that communicates with the liquid reservoir 50 and is connected to a catheter, and a light emitting portion 91. The plug 20 is made of a light-transmitting resin material (light-transmitting to visible light), and when the light-emitting portion 91 emits light, the light passes through the inside of the plug 20 and is emitted from the top surface 22 of the plug 20. Here, "light passes through the inside of the plug 20 and is emitted from the top surface 22 of the plug 20" means that the emitted light is visible when viewed from the top surface 22 side of the plug 20.

[0011] According to this embodiment, when the light emitting unit 91 emits light, the light passes through the inside of the plug 20 and is emitted from the upper surface 22 of the plug 20. Therefore, by visually checking the light emitted from the upper surface 22 of the plug 20, it becomes possible to recognize the position of the liquid injection port 100 from outside the body. Furthermore, as described later, light is selectively emitted from the upper surface 22 of the plug 20 out of the upper surface 22 of the plug 20 and the upper surface of the upper portion 12, so that the puncture position of a puncture needle (not shown) in the liquid injection port 100 can be easily recognized from outside the body.

[0012] In this embodiment, the liquid injection port 100 includes, in addition to a housing portion 10, a liquid reservoir portion 50, a connector portion 36 and a plug body 20, a metal annular frame body (upper frame 60 and lower frame 70) that surrounds the plug body 20. The liquid reservoir 50 is contained within the housing 10. The liquid reservoir 50 has an opening 56 and stores liquid. The connector portion 36 communicates from the liquid reservoir portion 50 to the outside of the housing portion 10 . The upper frame 60 and the lower frame 70 each have a higher rigidity than the housing portion 10, and are combined with each other to form an annular frame body. The plug 20 is also called a diaphragm portion and is made of an elastic material. The plug 20 is pressed into the frame and covers the opening 56.

[0013] The annular metallic frame includes an upper annular frame 60 located at the top and a lower annular frame 70 located at the bottom. The upper frame 60 has a cylindrical portion 61 formed in a cylindrical shape with a small axial dimension (vertical dimension), and an inner flange portion 62 protruding inward from the upper end portion of the cylindrical portion 61. The lower frame 70 has a cylindrical portion 71 formed in a cylindrical shape with a small axial dimension (vertical dimension), and an inner flange portion 72 protruding inward from the lower end portion of the cylindrical portion 71. For example, the inner diameter of the cylindrical portion 61 of the upper frame 60 and the outer diameter of the cylindrical portion 71 of the lower frame 70 are set to be equal dimensions, and the cylindrical portion 71 of the lower frame 70 is fitted into the cylindrical portion 61 of the upper frame 60. The inner flange portion 62 of the upper frame 60 and the inner flange portion 72 of the lower frame 70 face each other. The inner flange portion 62 of the upper frame 60 and the inner flange portion 72 of the lower frame 70 sandwich the plug 20 from above and below, thereby applying a pressing force to the plug 20. The upper frame 60 and the lower frame 70 are preferably made of a highly rigid material. Examples of such materials include metals such as titanium and stainless steel. The upper frame 60 and the lower frame 70 are not limited to being made of a single material, and may be made of a plurality of types of materials. In this embodiment, the annular frame surrounding the plug 20 is composed of two rigid frames, the upper frame 60 and the lower frame 70, and applies a pressing force from above and below the plug 20, but this is merely an example and is not necessarily limited to this. For example, the annular frame may be composed of three or more rigid frames, or a pressing force may be applied from the side by combining multiple arc-shaped rigid frames.

[0014] For example, the inner diameter of the inner flange portion 62 of the upper frame 60 is set to a dimension smaller than the inner diameter of the inner flange portion 72 of the lower frame 70. This makes it possible to prevent a puncture needle (not shown) from colliding with the inner flange portion 72 of the lower frame 70 when the puncture needle is inserted into the plug 20. However, this is only one example, and the same effect can be achieved even in an embodiment in which the inner diameter of the inner flange portion 62 of the upper frame 60 is equal to the inner diameter of the inner flange portion 72 of the lower frame 70.

[0015] The plug 20 is a member that covers the opening 56 of the liquid reservoir 50, and is made of an elastic body that can be pierced with a puncture needle (not shown). A strong pressing force is applied to the plug 20 by the upper frame 60 and the lower frame 70, so that the hole created when the puncture needle is removed is naturally closed. Examples of materials that can be used to form the plug 20 include rubbers such as silicone and isoprene.

[0016] Here, the plug 20 preferably contains a light scattering material. By doing this, the light can be scattered in various directions at various points on the plug 20 by the light scattering material, so that even if a highly directional light source such as an LED is used as the light-emitting section 91, light can be emitted uniformly from the entire surface of the upper surface 22 of the plug 20. The light scattering material is not particularly limited, but examples include inorganic particles (including pigments, colorants, metal powder, etc.) of titanium oxide, zirconia, mica, alumina, silica, etc., organic particles (including pigments, colorants, etc.) of acrylic resins, urethane resins, polycarbonate resins, polystyrene resins, etc., and in particular, those having a refractive index different from that of the plug 20 are preferable. The particle diameter (circle equivalent diameter) of the light scattering material includes those equal to or larger than the wavelength region of visible light. This allows the light scattering material to more reliably reflect light in various directions. The average particle diameter of the light scattering material is preferably, for example, 0.4 μm or more.

[0017] It is preferable that the plug 20 is integrally formed with the upper frame 60 or the lower frame 70. This makes it possible to prevent the plug 20 from peeling off from the frame even when a strong pressing force is applied. As an example, the plug 20 is molded integrally with the lower frame 70. More specifically, the inner flange portion 72 of the lower frame 70 is provided with a plurality of small holes having a diameter smaller than the width dimension of the inner flange portion 72, and the plug 20 is connected to the upper and lower parts of the inner flange portion 72 through these small holes, thereby being integrated with the lower frame 70. When the plug 20 is integrally molded with the lower frame 70 , the annular projection 28 and the annular recess 26 , which are part of the plug 20 , are formed below the lower surface of the inner flange portion 72 . The lower surface 24 of the plug 20 protrudes slightly downward beyond the recessed portion 26 and the protruding portion 28, for example. The annular protrusion 28 is formed on the underside of the plug 20 as a single piece of material with the plug 20, and abuts against the periphery of the opening 56 of the liquid reservoir 50. The annular protrusion 28 acts like a so-called O-ring, and prevents the liquid stored in the liquid reservoir 50 from leaking from the opening 56. It is desirable that the annular protrusion 28 extend in all directions around the central axis of the lower frame 70, and be formed in a closed ring shape with no missing portions. The present invention is not limited to an embodiment in which the plug 20 and the annular protrusion 28 are integrally molded, but may also be an embodiment in which, instead of the protrusion 28, an O-ring formed of a separate material from the plug 20 is provided on the underside of the plug 20.

[0018] 2 and 3, in the plug 20, each of a plurality of portions dispersedly arranged so as to surround the center of the plug 20 in a plan view serves as a protruding portion 21 formed to be thicker than the other portions. The protruding portion 21 is a portion of the plug 20 that partially protrudes upward. This allows the position of the liquid injection port 100 to be grasped by palpation through the subject's body surface using the protruding portion 21. In this embodiment, the protrusions 21 are disposed at three or more locations (for example, three locations as shown in FIG. 2) in the circumferential direction of the plug 20. In addition, the multiple protrusions 21 are preferably disposed at equal angular intervals in the circumferential direction of the plug 20.

[0019] The housing part 10 has, for example, an upper part 12 that surrounds the upper part of the plug body 20 and a lower part 14 that surrounds the recessed part, and the housing part 10 is formed by assembling the upper part 12 and the lower part 14 to each other. The upper portion 12 and the lower portion 14 are made of, for example, a resin material. The liquid reservoir 50 is contained within the housing 10, has an opening 56, and stores liquid. When the puncture needle reaches the liquid reservoir 50 through the plug 20, a liquid such as a medicinal liquid is supplied to the liquid reservoir 50 through the puncture needle. The connector 36 communicates from the liquid reservoir 50 to the outside of the housing 10.

[0020] The upper portion 12 is formed with an opening 12a for inserting a puncture needle into the plug 20 from the outside. As shown in FIG. 3, for example, the inner diameter of the opening 12a is set to a dimension equivalent to the inner diameter of the inner flange portion 62 of the upper frame 60. The upper portion of the plug 20 is disposed across the inner region of the inner flange portion 62 of the upper frame 60 and the inner region of the opening 12a of the upper portion 12. The upper surface 22 of the plug 20 is exposed to the outside through the opening 12a. More specifically, in a plan view, the opening 12a is formed in the center of the entire liquid injection port 100, and the periphery of the portion of the upper surface 22 exposed to the outside is surrounded by the upper surface of the upper portion 12. The surgeon can reach the liquid reservoir 50 through the plug 20 by inserting the puncture needle into the region of the upper surface 22 exposed to the outside through the opening 12a. Furthermore, for example, in the upper portion 12, the portion surrounding the opening 12a forms an annular convex portion that protrudes upward.

[0021] The liquid reservoir 50 is a portion for storing liquid such as a medicinal liquid injected through a puncture needle (not shown) inserted into the plug 20 . The liquid reservoir 50 is constituted by a recess 52 formed in the lower portion 14. Therefore, the bottom surface of the liquid reservoir 50 is made of a resin material, and the side surface 54 thereof is also made of a resin material. That is, the wall surfaces surrounding the liquid reservoir 50 (the bottom surface and the side surface 54) are made of a resin material. It should be noted that the present invention is not limited to this example, and the liquid reservoir 50 may be formed of a member separate from the lower portion 14. In this case, the liquid reservoir 50 may be formed of a resin material or other materials. Furthermore, the liquid reservoir 50 may be formed of a part of the lower frame 70. For example, in the lower portion 14, the portion surrounding the opening 56 of the liquid reservoir 50 is an annular convex portion that protrudes upward. Also, as described above, on the underside of the plug 20, the annular recess 26 is adjacent to the annular protrusion 28. The annular protrusion surrounding the opening 56 in the lower portion 14 fits into the annular recess 26. As a result, the periphery of the opening 56 together with the annular protrusion 28 functions as a so-called O-ring, and liquid leakage from the opening 56 can be more reliably suppressed. In this embodiment, an example is shown in which the annular recess 26 is formed on the inner diameter side of the annular protrusion 28, but the same effect can be achieved even in an embodiment in which the annular recess 26 is formed on the outer diameter side of the annular protrusion 28.

[0022] The connector portion 36 is a member that functions as a flow path that discharges the liquid stored in the liquid reservoir 50 to the outside of the liquid injection port 100, more specifically, to a catheter (not shown) connected to the tip of the connector portion 36. 3, the base end of the connector part 36 is fitted into a communication hole 58 provided in a side surface 54 of the liquid reservoir 50. The inner diameter of the connector part 36 and the inner diameter of the communication hole 58 are approximately equal, so that the liquid stored in the liquid reservoir 50 can smoothly flow into the connector part 36 via the communication hole 58. Since the connector section 36 becomes a flow path for liquid, it is preferable that it is made of a chemically resistant material. In addition, since a long catheter (not shown) is connected to the connector section 36 and the load applied to the catheter is also applied to the connector section 36, it is preferable that the connector section 36 has a certain level of strength (rigidity). Examples of materials that may be used to form the connector portion 36 include metals such as titanium and stainless steel, hard resin materials, and ceramics. The shape of the outer peripheral surface of the connector portion 36 includes a tapered portion that expands from the tip to the base end, and the outer diameter is discontinuously (steeply) reduced at the base end of the tapered portion. This prevents a catheter (not shown) fitted (fitted) on the connector portion 36 from falling off the connector portion 36.

[0023] The housing portion 10 is a portion that houses and protects the other components. As described above, the housing portion 10 includes an upper portion 12 located above and a lower portion 14 located below. 3, the upper frame 60 and the lower frame 70 are sandwiched from above and below by the upper portion 12 and the lower portion 14. The pressing force exerted by the upper portion 12 and the lower portion 14 on the upper frame 60 and the lower frame 70 is smaller than the pressing force exerted by the inner flange portion 62 of the upper frame 60 and the inner flange portion 72 of the lower frame 70 on the plug 20. The pressing force that the upper portion 12 and the lower portion 14 apply to the upper frame 60 and the lower frame 70 is also transmitted to the locations where the annular protrusion 28 and the annular recess 26 come into contact, thereby improving the liquid-tightness at those locations.

[0024] Since the housing portion 10 comes into contact with biological tissue, it is preferable that the housing portion 10 is biocompatible. Also, since the liquid injection port 100 is embedded under the skin for a long period of time, it is preferable that the housing portion 10 has a certain strength and does not deform due to body heat. Furthermore, it is preferable that the housing portion 10 is made of a material that is easy to process. Examples of materials that satisfy the above conditions include polyethersulfone resin, polyurethane resin, polypropylene resin, and polyethylene terephthalate resin.

[0025] Here, in this embodiment, the light-emitting portion 91 is embedded in the housing portion 10, and the housing portion 10 has a light-transmitting portion, and light from the light-emitting portion 91 reaches the plug 20 through the light-transmitting portion. More specifically, for example, the light-emitting portion 91 is embedded in the lower portion 14, and the lower portion 14 has a transmissive portion. The lower portion 14 is made of, for example, a light-transmissive resin material, and a portion of the lower portion 14 that is located near the light-emitting portion 91 constitutes the transmissive portion. As a result, the light output from the light emitting unit 91 passes through the inside of the lower portion 14 and further passes through the inside of the plug 20. Therefore, when the light emitting unit 91 embedded in the lower portion 14 emits light, the light is emitted from the upper surface 22 of the plug 20, so that the puncture position of the puncture needle in the liquid injection port 100 can be easily recognized from outside the body.

[0026] The light emitting portion 91 is embedded in the housing portion 10 at a portion located below the upper surface of the plug 20, for example. As shown in FIG. 3, the light emitting section 91 is disposed, for example, inside the hollow section 16 which is disposed below the lower surface of the plug 20. More specifically, the light emitting surface 92 of the light emitting unit 91 faces the plug 20. In the example shown in Fig. 3, the light emitting unit 91 is disposed in such a position that its light emitting surface 92 slopes downward toward the central axis (axis AX shown in Fig. 3) of the plug 20. In a plan view, the plug 20 and the light emitting unit 91 preferably overlap each other, and at least a portion of the light emitting surface 92 of the light emitting unit 91 is disposed inside the annular frame. The light emitting unit 91 may be disposed, for example, in a recess (not shown) that opens into the outer surface of the housing unit 10. In this case, the opening of the recess in which the light emitting unit 91 is disposed is preferably sealed, for example, with the same type of resin material as the resin material constituting the housing unit 10. A part of the light output from the light-emitting unit 91 passes through the lower portion 14, or passes through both the lower portion 14 and the liquid reservoir portion 50, and enters the plug 20. However, the light-emitting surface 92 may be configured to be in direct contact with the plug 20, for example, so that the light output from the light-emitting unit 91 enters the plug 20 directly. The light-emitting unit 91 is not particularly limited, but an example is an LED (light emitting diode), and visible light is output from the light-emitting unit 91. The number of light-emitting units 91 provided in the liquid injection port 100 is not particularly limited, and may be one or more. When the number of light-emitting units 91 is more than one, the light-emitting units 91 are preferably disposed in a dispersed manner, for example, in a plan view, and more preferably disposed at equal angular intervals around the central axis AX.

[0027] On the other hand, in the present embodiment, the upper portion 12 is light-shielding. This allows light to be selectively emitted from the plug 20 out of the plug 20 and the upper portion 12. That is, the plug 20 can be configured such that the light output from the light emitting unit 91 is emitted well, while the light is not emitted around the plug 20. This makes it easy to recognize the puncture position of the puncture needle (not shown) in the liquid injection port 100 from outside the body. The upper portion 12 is made of a resin material containing pigments and colorants such as carbon black and titanium, and is thus light-shielding.

[0028] Furthermore, the liquid injection port 100 includes a coil 96 that receives power through non-contact power supply, and the power received by the coil 96 is supplied to the light-emitting portion 91, causing the light-emitting portion 91 to emit light. Although there is no particular limitation on the number of turns of the wire that constitutes the coil 96, it is preferable that the number of turns is more than one. The axial direction of the coil 96 coincides with, for example, the up-down direction. In this embodiment, the method of contactless power supply to the liquid injection port 100 is an electromagnetic induction method. However, the present invention is not limited to this example, and the method of contactless power supply to the liquid injection port 100 may be another method. The coil 96 is electrically connected to the light-emitting portion 91 via wiring (not shown). When an external device (not shown) generates an induced electromotive force in the coil 96, power is supplied from the coil 96 to the light-emitting portion 91. The coil 96 is, for example, embedded in the lower portion 14. The coil 96 is arranged so as to surround the liquid reservoir portion 50 in a plan view. However, the lower portion 14 may have, for example, a recess (not shown) that opens to the outer surface of the housing portion 10, and the coil 96 may be arranged inside the recess.

[0029] The liquid injection port 100 is left in a subcutaneously implanted state in the subject. An example of the operation of supplying a liquid such as a medicinal liquid to the liquid injection port 100 using a puncture needle will be described below. The medicinal liquid may be an anticancer drug or a nutrient. First, as described above, when power is supplied contactlessly from an external device to the coil 96, power is supplied from the coil 96 to the light emitting unit 91, causing the light emitting unit 91 to emit light. Then, light is emitted from the upper surface 22 of the plug 20. This allows the operator to easily and accurately recognize the position of the liquid injection port 100. Furthermore, in the case of this embodiment, as described above, light is selectively emitted from the upper surface 22 of the plug 20 out of the plug 20 and the upper portion 12, while light is not emitted from the periphery of the upper surface 22. That is, the puncture position in the liquid injection port 100 emits light, so that the puncture position can be accurately recognized. Therefore, the operator can more reliably make the puncture needle reach the liquid reservoir 50 through the plug 20 by inserting the puncture needle into the illuminated area (puncture position) in the liquid injection port 100 through the opening 12a.

[0030] <Modification 1 of the First Embodiment> Next, a first modified example of the first embodiment will be described with reference to FIG. The liquid injection port 100 of this embodiment differs from the liquid injection port 100 of the first embodiment described above in the points described below, but in other respects is configured in the same way as the liquid injection port 100 of the first embodiment described above.

[0031] In this modification, plug 20 has voids therein that scatter light. This allows light to be scattered in various directions by the voids in various parts of the plug 20, so that even if a highly directional light source such as an LED is used as the light-emitting section 91, light can be emitted uniformly from the entire surface of the top surface 22 of the plug 20. For example, the voids can be formed by heating a light-transmitting resin material that has a foaming agent mixed in. Also, for example, when molding the plug 20, the light-transmitting resin material may be stirred and mixed (kneaded) with a gas (air, etc.) to form the voids. The outer diameter (circular equivalent diameter) of the voids is preferably equal to or larger than the wavelength region of visible light, so that the voids can more reliably reflect light in various directions.

[0032] <Modification 2 of the First Embodiment> Next, a second modified example of the first embodiment will be described with reference to FIGS. 5(a) and 5(b). The liquid injection port 100 of this embodiment differs from the liquid injection port 100 of the above-described first embodiment and variant 1 in the respects described below, but is otherwise configured in the same manner as the liquid injection port 100 of the above-described first embodiment and variant 1.

[0033] In this modified example, as shown in FIG. 5(a), the plug 20 has a first portion 23a and a second portion 23b made of a material having a refractive index different from that of the first portion 23a, and an uneven structure 29 that diffuses light is formed at the interface between the first portion 23a and the second portion 23b.

[0034] In this way, a part of the light output from the light emitting unit 91 can be scattered in various directions by the uneven structure 29, so that even if a light source with high directivity such as an LED is used as the light emitting unit 91, the light can be uniformly emitted from the entire surface of the upper surface 22 of the plug 20. More specifically, the uneven structure 29 suppresses total reflection at the interface between the first portion 23a and the second portion 23b, and the proportion of light that is emitted to the outside of the light that enters the plug 20 can be increased. Furthermore, the difference in refractive index between the first portion 23a and the second portion 23b can more reliably scatter a part of the light emitted from the light emitting unit 91 in various directions, so that the part of the light can be transmitted through the interface and directed toward the upper surface 22 of the plug 20.

[0035] In this modified example, the first portion 23a constitutes the upper portion of the plug 20, and the second portion 23b constitutes the lower portion of the plug 20. The plug 20 is constituted by assembling the first portion 23a and the second portion 23b together. Therefore, the upper surface of the first portion 23a constitutes the upper surface 22 of the plug 20, and the lower surface of the second portion 23b constitutes the lower surface 24 of the plug 20. The convex portion 28 and the concave portion 26 are formed on the lower surface of the second portion 23b, and the second portion 23b closes the opening of the concave portion 52. The light emitting surface 92 of the light emitting portion 91 is disposed facing the second portion 23b. 5(b), the surface of the first portion 23a facing the second portion 23b is an uneven surface, and the surface of the second portion 23b facing the first portion 23a is an uneven surface that is combined with the uneven surface of the first portion 23a. The uneven structure 29 is composed of the uneven surface of the first portion 23a and the uneven surface of the second portion 23b. The uneven surface of the uneven structure 29 is not particularly limited, but for example, as shown in FIG. 5(b), it is preferable that the cross-sectional shape is curved. In this way, light can be scattered in more various directions. The shapes of the convex parts and concave parts of the uneven surface of the uneven structure 29 are not particularly limited, but can be, for example, a hemisphere, a dome, a cone, a pyramid (quadratic pyramid), other pyramid shapes, a truncated cone shape, a truncated pyramid shape, or the like. The convex parts and concave parts of the uneven surface may be arranged regularly (periodically) or irregularly. In addition, the uneven surface may be, for example, a diamond cut surface, a crystal cut surface, a prism surface, a rough surface, or the like. It is preferable that the diameters (equivalent circle diameters) of the recesses and protrusions in the concave-convex structure 29 are equal to or larger than the wavelength region of visible light, so that the concave-convex structure 29 can more reliably reflect light in various directions.

[0036] The refractive index of the second portion 23b may be lower than the refractive index of the first portion 23a, for example. In other words, of the first portion 23a and the second portion 23b, the one having the lower refractive index may constitute the lower portion of the plug 20. In this case, it becomes easier for light to be extracted from the lower side of the plug 20 to the upper side of the plug 20, so that the proportion of light that reaches the inside of the plug 20 and is radiated to the outside can be further improved. The refractive index of the second portion 23b may be higher than the refractive index of the first portion 23a, for example. In other words, the one having the higher refractive index between the first portion 23a and the second portion 23b may constitute the lower portion of the plug 20. In this case, it becomes easier for light to be extracted to the outside from the upper side of the plug 20, so that the proportion of light that reaches the inside of the plug 20 and is radiated to the outside can be further improved.

[0037] <Modification 3 of the First Embodiment> Next, a third modified example of the first embodiment will be described with reference to FIG. The liquid injection port 100 of this modified example differs from the liquid injection port 100 of the above-described first embodiment and modified examples 1 and 2 in the respects described below, but is otherwise configured in the same manner as the liquid injection port 100 of the above-described first embodiment and modified examples 1 and 2.

[0038] In this modified example, a diffuse reflection structure 80 that diffusely reflects light is disposed between the light emitting portion 91 and the plug 20 . As a result, the light scattered in various directions by the diffuse reflection structure 80 enters the inside of the stopper body 20, so that even if a highly directional light source such as an LED is used as the light-emitting section 91, light can be emitted uniformly from the entire surface of the upper surface 22 of the stopper body 20. In this modified example, the diffuse reflection structure 80 is embedded in the lower portion 14 , is in direct contact with the light emitting surface 92 of the light emitting portion 91 , and is disposed below the lower surface 24 of the plug 20 . The diffuse reflection structure 80 may be configured, for example, so that light is diffusely reflected by the surface of the diffuse reflection structure 80, or so that light is diffusely reflected inside the diffuse reflection structure 80. When the diffuse reflection structure 80 is configured to diffusely reflect light by its surface, at least a portion of the surface of the diffuse reflection structure 80 is an uneven surface. The uneven surface of the diffuse reflection structure 80 is not particularly limited, but for example, it is preferable that the cross-sectional shape is curved. In this way, light can be scattered in more various directions. The shapes of the convex parts and concave parts of the uneven surface of the diffuse reflection structure 80 are not particularly limited, but can be, for example, hemispherical, dome-shaped, conical, pyramidal (quadratic pyramid), other pyramidal shapes, truncated conical, truncated pyramidal, etc. The convex parts and concave parts of the uneven surface may be arranged regularly (periodically) or irregularly. In addition, the uneven surface of the diffuse reflection structure 80 may be, for example, a diamond-cut surface, a crystal-cut surface, a prism surface, a rough surface, etc. In addition, it is preferable that the diameters (circle-equivalent diameters) of the concave parts and convex parts of the uneven surface of the diffuse reflection structure 80 are equal to or larger than the wavelength range of visible light. When the diffuse reflection structure 80 is configured to diffusely reflect light inside, the diffuse reflection structure 80 is configured, for example, of a light-transmitting resin material containing a light scattering material. The light scattering material is not particularly limited, and examples thereof include inorganic particles (including pigments, coloring materials, metal powder, etc.) such as titanium oxide, zirconia, mica, alumina, and silica, and organic particles (including pigments, coloring materials, etc.) such as acrylic resin, urethane resin, polycarbonate resin, and polystyrene resin. In addition, the diffuse reflection structure 80 may contain voids inside, or may have an uneven structure portion formed by combining two uneven surfaces with each other.

[0039] Second Embodiment Next, a second embodiment will be described with reference to FIG. The liquid injection port 100 of this embodiment differs from the liquid injection port 100 of the first embodiment described above in the points described below, but in other respects is configured in the same way as the liquid injection port 100 of the first embodiment described above.

[0040] As shown in FIG. 7, in the case of this modified example, the housing portion 10 directly abuts against the side peripheral surface 20a of the plug 20 to hold the plug 20. More specifically, as shown in FIG. 7, in this embodiment, plug 20 is sandwiched from above and below between upper portion 12 and lower portion 14 without the intervention of a metal ring-shaped frame. As described above, in the present embodiment, the liquid injection port 100 does not have a metal annular frame, and therefore it is possible to suppress heat generation that occurs when an examination is performed using, for example, a magnetic resonance imaging diagnostic device (not shown) on a living body in which the liquid injection port 100 is embedded.

[0041] <Modification of the second embodiment> Next, a modified example of the second embodiment will be described with reference to FIG. The liquid injection port 100 of this modified example differs from the liquid injection port 100 of the second embodiment described above in the points described below, but in other respects is configured in the same way as the liquid injection port 100 of the second embodiment described above.

[0042] 8, the lower portion 14 of the housing portion 10 has an inner portion 15b that surrounds the periphery of the recess 52 and an outer portion 15a that surrounds the periphery of the inner portion. The lower portion 14 is formed by assembling the inner portion 15b and the outer portion 15a to each other. The inner portion 15b is a light-transmitting portion, and the outer portion 15a is light-shielding.

[0043] This allows a configuration in which, when the light emitting unit 91 emits light, the light passes through the inside of the inner portion 15b and further passes through the inside of the plug 20, but does not pass through the periphery of the inner portion 15b (the inside of the outer portion 15a). Therefore, the light emitted from the light emitting unit 91 can be efficiently radiated from the inner portion 15b to the plug 20.

[0044] 8, an opening that is open in the vertical direction is formed in the center of outer portion 15a. Inner portion 15b is formed in a shape and size that fits into the opening of outer portion 15a, and the outer peripheral surface of inner portion 15b is in close contact with the inner peripheral surface of outer portion 15a. In this modified example, a recess 52 is formed in the inner portion 15b. The plug 20 is disposed above the inner portion 15b and liquid-tightly covers the opening of the recess 52. A light-emitting portion 91 is embedded in the inner portion 15b.

[0045] The present invention is not limited to the above-described embodiment, and includes various modifications and improvements as long as the object of the present invention is achieved. Furthermore, the above-described embodiments can be combined as appropriate without departing from the spirit and scope of the present invention.

[0046] For example, in the above description, an example was described in which the plug 20 contains a light scattering material, but it is also preferable that the plug 20 contains, for example, a fluorescent material. In this way, the fluorescent material contained in the plug 20 becomes a point light source when light is irradiated onto the plug 20. Therefore, the fluorescent material that becomes a point light source is scattered inside the plug 20, and light is transmitted between each fluorescent material. In this way, a chain of light is generated inside the plug 20, so that the entire plug 20 can be made to glow.

[0047] Also, for example, at least a portion of the outer surface of plug 20 may be an uneven surface that diffusely reflects light. By doing this, the uneven surface can scatter light in a variety of directions, so that even if a highly directional light source such as an LED is used as the light-emitting section 91, light can be emitted uniformly from the entire surface of the upper surface 22 of the plug 20. The uneven surface is not particularly limited, but for example, it is preferable that the cross-sectional shape is curved. In this way, light can be scattered in more various directions. The shape of the convex parts and the concave parts of the convex surface are not particularly limited, but for example, they can be hemispherical, dome-shaped, conical, pyramidal (quadratic pyramid), other pyramidal shapes, truncated conical, truncated pyramidal, etc. The convex parts and concave parts of the uneven surface may be arranged regularly (periodically) or irregularly. In addition, the uneven surface may be, for example, a diamond cut surface, a crystal cut surface, a prism surface, a rough surface, etc. In addition, it is preferable that the diameter (circle equivalent diameter) of the concave parts and the convex parts of the uneven surface is equal to or larger than the wavelength region of visible light. For example, if the upper surface 22 of the stopper body 20 is an uneven surface, the uneven surface can suppress total reflection at the upper surface 22, thereby further improving the proportion of light that enters the stopper body 20 and is radiated to the outside. Furthermore, for example, when the side peripheral surface or the lower surface of the plug 20 is an uneven surface, the light scattered in various directions by the uneven surface enters the inside of the plug 20, and the light can be made to reach the upper surface 22 of the plug 20 evenly. In this case, it is preferable that the light emitting section 91 is disposed near the area where the uneven surface is formed on the outer surface of the plug 20. In the present invention, the plug 20 may include, for example, two or more of the above-mentioned light scattering material, fluorescent material, voids, diffuse reflection structure 80, uneven structure portion 29, and uneven surface.

[0048] The present embodiment encompasses the following technical ideas. (1) A liquid injection port that is implanted in the body and left indwelling, a housing portion having a recess that constitutes a liquid reservoir portion for temporarily storing liquid supplied from outside the body; A plug closing the opening of the recess; a liquid introduction connector that communicates with the liquid reservoir and is connected to a catheter; A light emitting portion; Equipped with The plug is made of a light-transmitting resin material, and when the light-emitting section emits light, the light passes through the inside of the plug and is emitted from the top surface of the plug. (2) Equipped with a coil that receives power through a wireless power supply, The liquid injection port according to (1), wherein the power received by the coil is supplied to the light-emitting unit, causing the light-emitting unit to emit light. (3) the light emitting unit is embedded in the housing unit, The housing portion has a light-transmitting portion, The liquid injection port according to (1) or (2), wherein light from the light emitting portion reaches the plug through the light transmitting portion. (4) The liquid injection port according to (3), wherein the light emitting portion is embedded in a portion of the housing portion that is located below an upper surface of the plug. (5) The housing portion is an upper portion surrounding an upper portion of the plug; A lower portion surrounding the recess; having the upper portion and the lower portion are assembled to one another, The liquid injection port according to (4), wherein the light emitting portion is embedded in the lower portion, and the lower portion has the light transmitting portion. (6) A liquid injection port as described in (5), wherein the upper portion is light-tight. (7) The lower portion is an inner portion surrounding the recess; an outer portion surrounding the inner portion; having the inner portion and the outer portion are assembled to one another; the inner portion is the transmission portion, A liquid injection port as described in (5) or (6), wherein the outer portion is light-tight. (8) A liquid injection port according to any one of (1) to (7), wherein the plug contains a light scattering material. (9) A liquid injection port according to any one of (1) to (8), wherein the plug contains a fluorescent material. (10) A liquid injection port described in any one of (1) to (9), wherein the plug has a void therein that scatters light. (11) A liquid injection port according to any one of (1) to (10), wherein at least a portion of the outer surface of the plug is an uneven surface that diffusely reflects light. (12) A liquid injection port according to any one of (1) to (11), further comprising a diffuse reflection structure disposed between the light-emitting portion and the plug for diffusely reflecting light. (13) The plug has a first portion and a second portion made of a material having a refractive index different from that of the first portion, The liquid injection port according to any one of (1) to (12), wherein an uneven structure that diffusely reflects light is formed at the interface between the first portion and the second portion. (14) A liquid injection port according to any one of (1) to (13), comprising a metal annular frame surrounding the plug. (15) A liquid injection port described in any one of (1) to (13), wherein the housing portion is made of a resin material and directly abuts against a side surface of the plug to hold the plug. [Explanation of symbols]

[0049] 10 Housing section 12 Upper part 12a opening 14 Lower part 15a outer part 15b Inner part 16 Cavity 20 Plug body 20a Side surface 21 Convex 22 Top side 23a First member 23b Second member 24 Bottom side 26 Recess 28 Convex 29 Uneven structure 36 Connector part 50 Liquid reservoir 52 Recess 54 Side 56 Aperture 58 Communication hole 60 Upper Frame 61 Cylindrical part 62 Inner flange 70 Lower Frame 71 Cylindrical part 72 Inner flange 80 Diffuse reflection structure 91 Light emitting part 92 Light-emitting surface 96 Coil 100 Liquid Injection Port AX axis

Claims

1. A liquid injection port that is implanted in the body and left indwelling, a housing portion having a recess that constitutes a liquid reservoir portion for temporarily storing liquid supplied from outside the body; A plug closing the opening of the recess; a liquid introduction connector that communicates with the liquid reservoir and is connected to a catheter; A light emitting portion; Equipped with the plug is made of a light-transmitting resin material, and when the light-emitting portion emits light, the light passes through the inside of the plug and is emitted from an upper surface of the plug; The light emitting portion is embedded in the housing portion, The housing portion has a light-transmitting portion, A liquid injection port in which light from the light emitting portion reaches the plug through the light transmitting portion.

2. A coil that receives power through non-contact power supply is provided. The liquid injection port according to claim 1 , wherein the power received by the coil is supplied to the light-emitting unit, causing the light-emitting unit to emit light.

3. 3. The liquid injection port according to claim 1, wherein the light emitting portion is embedded in a portion of the housing portion that is located below an upper surface of the plug.

4. The housing portion includes: an upper portion surrounding an upper portion of the plug; A lower portion surrounding the recess; having the upper portion and the lower portion are assembled to one another, 4. The liquid injection port according to claim 3, wherein the light emitting portion is embedded in the lower portion, and the lower portion has the light transmitting portion.

5. The liquid injection port of claim 4, wherein said upper portion is light-tight.

6. The lower portion is an inner portion surrounding the recess; an outer portion surrounding the inner portion; having the inner portion and the outer portion are assembled to one another; the inner portion is the transmission portion, A liquid injection port according to claim 4 or 5, wherein the outer portion is light-tight.

7. The liquid injection port according to claim 1 , wherein the plug contains a light scattering material.

8. The liquid injection port according to claim 1 , wherein the plug contains a fluorescent material.

9. 9. The liquid injection port according to claim 1, wherein the plug has a void therein that scatters light.

10. 10. The liquid injection port according to claim 1, wherein at least a portion of an outer surface of the plug is an uneven surface that diffusely reflects light.

11. 11. The liquid injection port according to claim 1, further comprising a diffuse reflection structure disposed between the light emitting portion and the plug for diffusely reflecting light.

12. The plug has a first portion and a second portion made of a material having a refractive index different from that of the first portion, The liquid injection port according to claim 1 , wherein an uneven structure that diffusely reflects light is formed at an interface between the first portion and the second portion.

13. 13. The liquid injection port according to claim 1, further comprising a metal annular frame surrounding the plug.

14. 13. The liquid injection port according to claim 1, wherein the housing portion is made of a resin material and directly abuts against a side peripheral surface of the plug to hold the plug.

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