Liquid injection port

Abstract

To provide a liquid injection port system that allows the position of a liquid injection port to be recognized from the outside of a body.SOLUTION: A liquid injection port 100 comprises a housing part 10 having a liquid reservoir part 50 for temporarily reserving liquid supplied from the outside of a body, a plug body 20 closing an opening of a 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 embedded in the housing part 10. At least an upper part 12 of the housing part 10 is made of an optically transparent resin material. The upper part 12 of the housing part 10 surrounds the periphery of the plug body 20. The light emitting part 91 emits light, and thereby the light passes through the inside of at least the upper part 12 of the housing part 10, and is emitted from an upper surface 12a of at least the upper part 12 of the housing part 10.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] A liquid injection port that is implanted in the body and left in a state of being implanted is known. The liquid injection port has a reservoir portion inside that temporarily stores the liquid supplied from outside the body. When a needle for supplying liquid from outside the body is inserted into the reservoir portion to supply the liquid to the reservoir portion, the liquid is guided to the catheter through the liquid introduction connector and supplied from the catheter to a desired location in the body. As such a liquid injection port, for example, there is one described in Patent Document 1.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors of the present application considered that there is a need to recognize the position of the liquid injection port from outside the body.

[0005] The present invention has been made in view of the above problems, and provides a liquid injection port capable of recognizing the position of the liquid injection port from outside the body.

Means for Solving the Problems

[0006] The present invention is a liquid injection port that is implanted in the body and left in a state of being implanted, a housing portion having a recess that constitutes a reservoir portion for temporarily storing the liquid supplied from outside the body, a plug body that closes the opening of the recess, A liquid introduction connector that communicates with the liquid reservoir portion and is connected to a catheter, A light emitting portion embedded in the housing portion, and is provided with, At least the upper part of the housing portion is made of a light-transmissive resin material, The upper part of the housing portion surrounds the periphery of the plug body, When the light emitting portion emits light, the light passes through the inside of at least the upper part of the housing portion and is radiated from the upper surface of at least the upper part of the housing portion, The inner peripheral surface of the upper part of the housing portion includes a second inclined surface that is inclined upward so as to approach the central axis side of the plug body, The light emitting portion is disposed outside the second inclined surface in the radial direction of the plug body and is disposed below the second inclined surface in the vertical direction and The light-emitting part is a liquid disposed above the lower surface of the plug body It provides a body injection port.

Advantages of the Invention

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

Brief Description of the Drawings

[0008] [Fig. 1] It is a perspective view of a liquid injection port according to the first embodiment. [Fig. 2] It is a plan view of a liquid injection port according to the first embodiment. [Fig. 3] It is a side sectional view of a liquid injection port according to the first embodiment. [Fig. 4] It is a side sectional view of a liquid injection port according to Modification 1 of the first embodiment. [Fig. 5] It is a side sectional view of a liquid injection port according to Modification 2 of the first embodiment. [Fig. 6] It is a side sectional view of a liquid injection port according to Modification 3 of the first embodiment. [Fig. 7]It is a side sectional view of the liquid injection port according to Modification Example 4 of the first embodiment. [Fig. 8] It is a side sectional view of the liquid injection port according to the second embodiment. [Fig. 9] It is a side sectional view of the liquid injection port according to the modification of the second embodiment.

Mode for Carrying Out the Invention

[0009] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. Further, in the following description, the upper and lower sides refer to the top surface side (the upper side in FIG. 3) and the bottom surface side (the lower side in FIG. 3) of the liquid injection port 100. Further, the term "annular" refers to a shape (such as a circle or a square) that surrounds a certain area when viewed from above or below, or a shape (such as a C shape or a U shape) in which a part of the contour surrounding a certain area is missing.

[0010] 〔First Embodiment〕 First, the first embodiment will be described with reference to FIGS. 1 to 3. As shown in any one of FIGS. 1 to 3, the liquid injection port 100 is a liquid injection port that is implanted in the body and retained, and includes a housing portion 10 having a recess 52 that constitutes a liquid reservoir portion 50 for temporarily storing the liquid supplied from the outside of the body, a plug body 20 that closes the opening of the recess 52, a liquid introduction connector (connector portion 36) that communicates with the liquid reservoir portion 50 and is connected to a catheter, and a light emitting portion 91 embedded in the housing portion 10. At least the upper portion 12 of the housing portion 10 is made of a resin material having light transmissivity (light transmissivity with respect to visible light). The upper portion 12 of the housing portion 10 surrounds the periphery of the plug body 20, and when the light emitting portion 91 emits light, the light passes through at least the inside of the upper portion 12 of the housing portion 10 and is radiated from the upper surface 12a of at least the upper portion 12 of the housing portion 10. Here, "light is emitted from the upper surface 12a of at least the upper portion 12 of the housing portion 10" means that light emission can be visually recognized when viewed from the upper surface 12a side of the upper portion 12.

[0011] According to the present embodiment, when the light emitting portion 91 emits light, the light passes through at least the inside of the upper portion 12 of the housing portion 10 and is emitted from the upper surface 12a of at least the upper portion 12 of the housing portion 10. Therefore, by visually recognizing the light emitted from the upper surface 12a of the upper portion 12, it becomes possible to recognize the position of the liquid injection port 100 from outside the body. Furthermore, since the upper portion 12 surrounds the periphery of the plug body 20, although details will be described later, while light is selectively emitted from the periphery (upper portion 12) of the upper surface 22 of the plug body 20 between the upper portion 12 and the plug body 20, it is possible to adopt a configuration in which light is hardly emitted from the upper surface 22. Therefore, the operator can easily recognize the puncture position of the puncture needle (not shown) at the liquid injection port 100 from outside the body.

[0012] In the case of the present embodiment, the liquid injection port 100 includes, in addition to the housing portion 10, the liquid reservoir portion 50, the connector portion 36, and the plug body 20, a metal annular frame body (upper frame 60 and lower frame 70) surrounding the periphery of the plug body 20. The liquid reservoir portion 50 is enclosed in the housing portion 10. The liquid reservoir portion 50 has an opening 56 and stores liquid. The connector portion 36 communicates with the outside of the housing portion 10 from the liquid reservoir portion 50. The plug body 20, also referred to as a diaphragm portion, is composed of an elastic body. The plug body 20 is pushed into the frame body and covers the opening 56.

[0013] The metal annular frame body includes an annular upper frame 60 located above and an annular lower frame 70 located below. The upper frame 60 and the lower frame 70 have higher rigidity than the housing portion 10 and are combined with each other to form an annular frame body. The upper frame 60 has a cylindrical portion 61 formed in a cylindrical shape with a small dimension (vertical dimension) in the axial direction, and a reduced-diameter portion 62 formed in a cylindrical shape that gradually reduces in diameter upward from the upper end of the cylindrical portion 61. The lower frame 70 has a cylindrical portion 71 formed in a cylindrical shape with a small dimension (vertical dimension) in the axial direction, and an inner flange portion 72 that projects 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 to each other, and the cylindrical portion 71 of the lower frame 70 is fitted into the cylindrical portion 61 of the upper frame 60. The reduced-diameter portion 62 of the upper frame 60 is disposed above the upper end of the cylindrical portion 71 of the lower frame 70, and the reduced-diameter portion 62 of the upper frame 60 and the inner flange portion 72 of the lower frame 70 sandwich the plug body 20 from above and below to apply a pressing force to the plug body 20. The upper frame 60 and the lower frame 70 are preferably formed of a high-rigidity material. As an example of such a material, metals such as titanium and stainless steel can be mentioned. Note that the upper frame 60 and the lower frame 70 are not limited to being formed of a single material, and may be formed of a plurality of types of materials. In this embodiment, the annular frame surrounding the periphery of the plug body 20 is constituted by two rigid frames, the upper frame 60 and the lower frame 70, and applies a pressing force to the plug body 20 from the vertical direction. However, this mode is only an example and is not necessarily limited to this mode. For example, the annular frame may be constituted by three or more rigid frames, or a plurality of arc-shaped rigid frames may be combined to apply a pressing force from the side.

[0014] For example, the inner diameter (minimum diameter) of the reduced-diameter portion 62 of the upper frame 60 is set to be smaller than the inner diameter of the inner flange portion 72 of the lower frame 70. Thereby, when a puncture needle (not shown) is stabbed into the plug body 20, the collision of the puncture needle against the inner flange portion 72 of the lower frame 70 can be suppressed.

[0015] The plug body 20 is a member that covers the opening 56 of the liquid reservoir portion 50 and is formed of an elastic body that can be pierced by a puncture needle (not shown). Further, a strong pressing force is applied to the plug body 20 by the upper frame 60 and the lower frame 70 so that the hole formed by removing the puncture needle is naturally blocked. Examples of the material forming the plug body 20 include rubbers such as silicone and isoprene. In the case of this embodiment, the plug body 20 is made of a light-shielding resin material. Thereby, a configuration can be adopted in which light is selectively emitted from the upper portion 12 among the plug body 20 and the upper portion 12. That is, in the vicinity of the plug body 20, the light output from the light-emitting portion 91 can be favorably radiated, while in the plug body 20, the light can be prevented from being radiated. As a result, it becomes easier to recognize the puncture position of the puncture needle (not shown) in the liquid injection port 100 from outside the body. The light-shielding resin material has light-shielding properties by containing pigments and colorants such as carbon black and titanium. In the case of this embodiment, as described above, the liquid injection port 100 includes a metal annular frame body surrounding the periphery of the plug body 20. Therefore, the metal annular frame body can also suppress the light generated from the light-emitting portion 91 from entering the inside of the plug body 20, and a configuration can be realized in which light is selectively radiated from the upper portion 12 among the plug body 20 and the upper portion 12.

[0016] In the case of this embodiment, the metal annular frame body directly surrounds the periphery of the plug body 20. Therefore, the inner peripheral surface of the lower frame 70 is in contact with the outer peripheral surface of the plug body 20. More specifically, it is preferable that the plug body 20 is integrally formed with the upper frame 60 or the lower frame 70. Thereby, even when a strong pressing force acts, the plug body 20 can be made difficult to peel off from the frame body. As an example, the plug body 20 is integrally formed with the lower frame 70. More specifically, a plurality of small holes having a smaller diameter than the width dimension of the inner flange portion 72 are provided in the inner flange portion 72 of the lower frame 70, and the plug body 20 is connected to each other above and below the inner flange portion 72 through these small holes, thereby being integrated with the lower frame 70. When the plug body 20 is integrally formed with the lower frame 70, an annular convex portion 28 and an annular concave portion 26, which are parts of the plug body 20, are formed below the lower surface of the inner flange portion 72. The lower surface 24 of the plug body 20 protrudes slightly below, for example, the concave portion 26 and the convex portion 28. The annular convex portion 28 is formed of the same material as the plug body 20 on the lower surface 24 of the plug body 20 and is in contact with the periphery of the opening 56 of the liquid reservoir portion 50. The annular convex portion 28 acts like a so-called O-ring to suppress leakage of the liquid stored in the liquid reservoir portion 50 from the opening 56. The annular convex portion 28 preferably extends over the entire range around the central axis of the lower frame 70 and is formed in a closed annular shape without any missing portions. Note that the present invention is not limited to the mode in which the plug body 20 and the annular convex portion 28 are integrally formed. Instead of the convex portion 28, an O-ring formed of a separate member from the plug body 20 may be provided on the lower surface 24 of the plug body 20.

[0017] In the case of the present embodiment, as shown in FIGS. 2 and 3, in the plug body 20, each of a plurality of portions that are dispersedly arranged so as to surround the center of the plug body 20 in a plan view is a convex portion 21 formed thicker than other portions. The convex portion 21 is a portion where the plug body 20 partially protrudes upward. Thereby, the position of the liquid injection port 100 can be grasped by palpation through the body surface of the subject by the convex portion 21. In the case of the present embodiment, the convex portions 21 are arranged at three or more positions (for example, three positions as shown in FIG. 2) in the circumferential direction of the plug body 20. Further, it is preferable that the plurality of convex portions 21 are arranged at equal angular intervals in the circumferential direction of the plug body 20.

[0018] The housing part 10 has, for example, an upper part 12 and a lower part 14 that surrounds the periphery of the recessed part 52. The housing part 10 is constituted by assembling the upper part 12 and the lower part 14 with each other. Each of the upper part 12 and the lower part 14 is made of a light-transmissive resin material. The liquid reservoir part 50 is enclosed in the housing part 10, has an opening 56, and stores liquid. In a state where the puncture needle reaches the liquid reservoir part 50 through the plug body 20, liquid such as a chemical solution is supplied to the liquid reservoir part 50 through the puncture needle. The connector part 36 communicates with the outside of the housing part 10 from the liquid reservoir part 50.

[0019] An opening 12b for piercing the plug body 20 with a puncture needle from the outside is formed in the upper part 12. As shown in FIG. 3, for example, the inner diameter of the opening 12b is set to be equal to or slightly smaller than the inner diameter of the upper end of the reduced-diameter part 62 of the upper frame 60. The upper part of the plug body 20 is arranged across the inner region of the reduced-diameter part 62 of the upper frame 60 and the inner region of the opening 12b of the upper part 12. A part of the upper surface 22 of the plug body 20 is exposed to the outside of the liquid injection port 100 through the opening 12b. More specifically, in a plan view, the opening 12b is formed at the center of the entire liquid injection port 100, and the periphery of the part exposed to the outside on the upper surface 22 of the plug body 20 is surrounded by the upper surface 12a of the upper part 12. The operator can make the puncture needle reach the liquid reservoir part 50 through the plug body 20 by piercing the puncture needle into the region exposed to the outside on the upper surface 22 through the opening 12b. Also, for example, in the upper part 12, the part around the opening 12b is an annular convex part protruding upward.

[0020] For example, a light-emitting part 91 is embedded in the lower part 14. And since each of the upper part 12 and the lower part 14 is made of a light-transmissive resin material, the light emitted from the light-emitting part 91 passes through the inside of the lower part 14 and further through the inside of the upper part 12. Therefore, light is radiated from each of the outer surface of the upper part 12 and the outer surface of the lower part 14. As a result, light will be radiated from the entire housing part 10, making it easy to recognize the position of the liquid injection port 100 from outside the body. Furthermore, as described above, since the upper part 12 surrounds the periphery of the plug body 20, the puncture position of the puncture needle at the liquid injection port 100 can be easily recognized from outside the body. As shown in FIG. 3, the light emitting part 91 is disposed, for example, inside a cavity 16 disposed above the lower surface 24 of the plug body 20. More specifically, the light emitting surface 92 of the light emitting part 91 faces the plug body 20 side. In the example shown in FIG. 3, the light emitting part 91 is disposed in a posture in which its light emitting surface 92 is inclined downward toward the central axis (axis AX shown in FIG. 3) of the plug body 20. Note that the light emitting part 91 may be disposed, for example, in a recess (not shown) opened on the outer surface of the housing part 10. In this case, it is preferable that the opening of the recess in which the light emitting part 91 is disposed is sealed with, for example, a resin material of the same type as the resin material constituting the housing part 10. The light emitting part 91 is not particularly limited, but as an example, it may be an LED (light Emitting Diode), and visible light is output from the light emitting part 91. The number of light emitting parts 91 provided in the liquid injection port 100 is not particularly limited, and for example, it may be one or a plurality. When the number of light emitting parts 91 is plural, each light emitting part 91 is preferably disposed dispersedly, for example, in a plan view, and more preferably disposed at equal angular intervals around the axis of the central axis AX.

[0021] Furthermore, the liquid injection port 100 includes a coil 96 that receives power by non-contact power supply, and the power received by the coil 96 is supplied to the light emitting part 91, causing the light emitting part 91 to emit light. The number of turns of the wire forming the coil 96 is not particularly limited, but it is preferably plural. The axial direction of the coil 96 coincides with, for example, the vertical direction. In the case of this embodiment, the power supply method for non-contact power supply to the liquid injection port 100 is the electromagnetic induction method. However, the present invention is not limited to this example, and the power supply method for non-contact power supply to the liquid injection port 100 may be other methods. The coil 96 is electrically connected to the light-emitting unit 91 via wiring (not shown). When an induced electromotive force is generated in the coil 96 by an external device (not shown), power is supplied from the coil 96 to the light-emitting unit 91. The coil 96 is, for example, embedded in the lower part 14. The coil 96 is arranged so as to surround the liquid reservoir portion 50 in a plan view. However, in the lower part 14, for example, a recess (not shown) that opens to the outer surface of the housing portion 10 is formed, and the coil 96 may be arranged inside the recess.

[0022] The liquid reservoir portion 50 is a part that stores a liquid such as a chemical solution injected through a puncture needle (not shown) inserted into the plug body 20. The liquid reservoir portion 50 is constituted by a recess 52 formed in the lower part 14. Therefore, the bottom surface of the liquid reservoir portion 50 is formed of a resin material, and its side surface 54 is also formed of a resin material. That is, the wall surfaces (bottom surface and side surface 54) surrounding the liquid reservoir portion 50 are formed of a resin material. Note that the present invention is not limited to this example, and the liquid reservoir portion 50 may be constituted by a member separate from the lower part 14. In this case, the liquid reservoir portion 50 may be constituted by a resin material or other materials. Further, the liquid reservoir portion 50 may be constituted by a part of the lower frame 70. For example, in the lower part 14, the portion around the opening 56 of the liquid reservoir portion 50 is an annular convex portion protruding upward. Also, as described above, on the lower surface 24 of the plug body 20, an annular recess 26 is adjacent to the annular convex portion 28. And the annular convex portion around the opening 56 in the lower part 14 is fitted into the annular recess 26. Thereby, the peripheral edge of the opening 56 together with the annular convex portion 28 also functions as a so-called O-ring, and liquid leakage from the opening 56 can be more reliably suppressed. Note that in the present embodiment, an aspect in which the annular recess 26 is formed on the inner diameter side of the annular convex portion 28 is illustrated, but an aspect in which the annular recess 26 is formed on the outer diameter side of the annular convex portion 28 also has the same effect.

[0023] The connector portion 36 functions as a flow path for discharging the liquid stored in the liquid reservoir portion 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. As shown in FIG. 3, the proximal end of the connector portion 36 is fitted into a communication hole 58 provided on the side surface 54 of the liquid reservoir portion 50. The inner diameter of the connector portion 36 and the inner diameter of the communication hole 58 are substantially equal, so that the liquid stored in the liquid reservoir portion 50 can flow smoothly into the connector portion 36 through the communication hole 58. Since the connector portion 36 serves as a flow path for the liquid, it is preferably formed of a chemical-resistant material. In addition, since a long catheter (not shown) is connected and the load applied to the catheter is also applied to the connector portion 36, it is desirable to have a certain strength (rigidity). Examples of the material constituting 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 proximal end. At the proximal end of the tapered portion, the outer diameter discontinuously (sharply) decreases. For this reason, a catheter (not shown) fitted (externally fitted) to the connector portion 36 is prevented from falling off the connector portion 36.

[0024] In the case of this embodiment, the housing portion 10 is a part that houses and protects other components. As described above, the housing portion 10 includes an upper portion 12 and a lower portion 14. As shown in FIG. 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. Note that the pressing force applied by the upper portion 12 and the lower portion 14 to the upper frame 60 and the lower frame 70 is smaller than the pressing force applied by the reduced-diameter portion 62 of the upper frame 60 and the inner flange portion 72 of the lower frame 70 to the plug body 20. The pressing force applied by the upper part 12 and the lower part 14 to the upper frame 60 and the lower frame 70 is also transmitted to the locations where the annular convex part 28 and the annular concave part 26 come into contact. Therefore, the liquid tightness at these locations is improved.

[0025] In addition, since the housing part 10 contacts the living tissue, it is preferably biocompatible. Also, since the liquid injection port 100 is implanted under the skin for a long time, the housing part 10 preferably has a certain strength and does not deform due to body heat. Furthermore, the housing part 10 is preferably formed of a material that is easy to process. Examples of materials that satisfy the above conditions include polyethersulfone resin, polyurethane resin, polypropylene resin, polyethylene terephthalate resin, and the like.

[0026] Here, the light-transmissive resin material constituting each of the upper part 12 and the lower part 14 preferably contains a light-scattering material. By doing so, light can be scattered in various directions at various locations of the upper part 12 and the lower part 14. Therefore, even when a light source with high directivity such as an LED is used as the light-emitting part 91, light can be radiated uniformly from the entire upper surface 12a of the upper part 12. The light-scattering material is not particularly limited. For example, it can be inorganic particles (including pigments, colorants, metal powders, etc.) such as titanium oxide, zirconia, mica, alumina, and silica, and organic particles (including pigments and colorants) such as acrylic resins, urethane resins, polycarbonate resins, and polystyrene resins. In particular, the refractive index of the light-scattering material is preferably different from the refractive index of the light-transmissive resin material constituting each of the upper part 12 and the lower part 14. The particle diameter (equivalent circular diameter) of the light-scattering material is equal to or larger than the wavelength range of visible light. Thereby, light can be more reliably reflected in various directions by the light-scattering material. The average particle diameter of the light-scattering material is preferably, for example, 0.4 μm or more.

[0027] Furthermore, in the case of the present embodiment, the outer peripheral surface of the upper part 12 of the housing part 10 includes a first inclined surface 13a that is inclined so as to approach the central axis side of the plug body upward. As a result, the light incident on the outer peripheral surface of the upper part 12 from the light emitting part 91 is sufficiently reflected upward by the first inclined surface 13a, so that more light can be radiated from the upper surface 12a of the upper part 12. In addition, the outer peripheral surface of the frame body includes a third inclined surface 60a that is inclined so as to approach the central axis side of the plug body 20 upward. As a result, the light radiated from the light emitting part 91 can be directed toward the upper surface 12a side by the third inclined surface 60a, so that the light generated from the light emitting part 91 can be well radiated also from the portion overlapping the frame body in plan view on the upper surface 12a of the upper part 12. In addition, the inner peripheral surface of the upper part 12 of the housing part 10 includes a second inclined surface 13b that is inclined so as to approach the central axis side of the plug body 20 upward. As a result, for example, even when the liquid injection port 100 does not include a frame body, that is, when the liquid injection port 100 does not include the third inclined surface 60a, the light generated from the light emitting part 91 can be sufficiently reflected upward by the second inclined surface 13b, so that the light can be well radiated from the upper surface 12a of the upper part 12. In addition, in the case of the present embodiment, as shown in FIG. 3, since a part of the second inclined surface 13b is disposed above the upper end of the frame body, more light can be more reliably radiated from the upper surface 12a by the second inclined surface 13b.

[0028] More specifically, the outer diameter of a part of the upper part 12 in the axial direction gradually decreases upward, and the outer peripheral surface of the part constitutes the first inclined surface 13a. The first inclined surface 13a is disposed in the outer region of the upper surface 12a of the upper part 12. Similarly, the inner diameter of a part of the upper part 12 in the axial direction gradually decreases upward, and the inner peripheral surface of the part constitutes the second inclined surface 13b. In plan view, a part of the second inclined surface 13b overlaps the upper surface 12a of the upper part 12. Also, as described above, the upper frame 60 has a reduced-diameter portion 62. The outer peripheral surface of the reduced-diameter portion 62 of the upper frame 60 constitutes a third inclined surface 60a. In the plug body 20, a portion corresponding to the third inclined surface 60a of the upper frame 60 constitutes a fourth inclined surface 20b that is inclined so as to approach the central axis side of the plug body upward. The inclination angle of the first inclined surface 13a with respect to the central axis of the plug body 20 is smaller than the inclination angle of the second inclined surface 13b with respect to the central axis of the plug body 20. Thereby, the entire housing portion 10 and thus the liquid injection port 100 can be made smaller. However, the inclination angle of the first inclined surface 13a with respect to the central axis of the plug body 20 may be substantially equal to or larger than the inclination angle of the second inclined surface 13b with respect to the central axis of the plug body 20. Furthermore, as described above, the light-emitting portion 91 is disposed in a posture in which its light-emitting surface 92 inclines downward toward the central axis (axis AX shown in FIG. 3) side of the plug body 20. Also, as shown in FIG. 3, the light-emitting surface 92 is embedded outside each of the second inclined surface 13b and the third inclined surface 60a in the radial direction of the plug body 20, and is embedded below each of the second inclined surface 13b and the third inclined surface 60a in the vertical direction. The inclination angle of the light-emitting surface 92 with respect to the central axis of the plug body 20 is larger than the inclination angles of the second inclined surface 13b and the third inclined surface 60a with respect to the central axis of the plug body 20, respectively. A part of the light radiated from the light-emitting surface 92 passes through the inside of the lower part 14 and the inside of the upper part 12 in this order, and reaches any one of the upper surface 12a of the upper part 12, the first inclined surface 13a, the second inclined surface 13b, and the third inclined surface 60a. A part of the light that has reached the upper surface 12a is radiated from the upper surface 12a as it is. A part of the light that has reached the first inclined surface 13a is reflected toward the upper surface 12a side by the first inclined surface 13a, and a part of the other light among the light is reflected upward after reaching the second inclined surface 13b. A part of the light that has reached the second inclined surface 13b is reflected upward by the second inclined surface 13b. A part of the light that has reached the third inclined surface 60a is reflected upward by the third inclined surface 60a, and a part of the other light among the light is reflected upward after reaching the first inclined surface 13a. In this way, the light emitted from the light-emitting surface 92 can be directed toward the upper surface 12a side of the upper portion 12 by the action of the first inclined surface 13a to the third inclined surface 60a.

[0029] The liquid injection port 100 is left in a state of being embedded under the skin of the subject. Hereinafter, an example of an operation of supplying a liquid such as a chemical solution to the liquid injection port 100 using a puncture needle will be described. Examples of the chemical solution include an anticancer agent and a nutrient agent. First, as described above, non-contact power supply is performed from an external device to the coil 96, so that power is supplied from the coil 96 to the light-emitting unit 91, and the light-emitting unit 91 emits light. Then, light is radiated from the upper surface 12a of the upper portion 12. Thereby, the operator can easily and accurately recognize the position of the liquid injection port 100. Furthermore, in the case of the present embodiment, as described above, while light is selectively radiated from the periphery of the upper surface 22 of the plug body 20 (the upper surface 12a of the upper portion 12) between the plug body 20 and the upper portion 12, it is difficult for light to be radiated from the upper surface 22. That is, since the periphery of the puncture position in the liquid injection port 100 emits light, the puncture position can be accurately recognized. Therefore, the operator can more surely reach the liquid reservoir portion 50 through the plug body 20 by inserting the puncture needle into the inside (puncture position) of the annular region surrounded by the light-emitting portion in the liquid injection port 100 through the opening 12b.

[0030] <Modification Example 1 of the First Embodiment> Next, Modification Example 1 of the first embodiment will be described with reference to FIG. 4. The liquid injection port 100 according to this modification is different from the liquid injection port 100 according to the first embodiment described above in the points described below, and is configured in the same manner as the liquid injection port 100 according to the first embodiment described above in other points.

[0031] In the case of this modification, the light-transmissive resin material constituting the housing portion 10 has voids (see FIG. 4) that scatter light inside. As a result, at various locations of the upper part 12 and the lower part 14, the voids can scatter light in various directions. Therefore, even when a highly directional light source such as an LED is used as the light emitting part 91, light can be radiated uniformly from the entire surface of the housing part 10. For example, the voids can be formed by heating a light-transmissive resin material mixed with a foaming agent. Also, for example, when molding the housing part 10, voids may be formed by stirring a light-transmissive resin material and mixing (kneading) it with a gas (such as air). The outer diameter (equivalent circular diameter) of the voids is preferably equal to or larger than the wavelength range of visible light. Thereby, light can be more reliably reflected in various directions by the voids.

[0032] <Modification Example 2 of the First Embodiment> Next, Modification Example 2 of the First Embodiment will be described with reference to FIG. 5. The liquid injection port 100 according to the present embodiment is different from the liquid injection port 100 according to the above-described First Embodiment in the points described below, and is configured in the same manner as the liquid injection port 100 according to the above-described First Embodiment in other points.

[0033] In the case of this modification example, a diffuse reflection structure 80 that diffusely reflects light is disposed between the light emitting part 91 and the light-transmissive resin material. As a result, light scattered in various directions by the diffuse reflection structure 80 enters the inside of the housing part 10. Therefore, even when a highly directional light source such as an LED is used as the light emitting part 91, light can be radiated uniformly from the entire surface of the upper surface 12a of the upper part 12. In the case of this modification example, the diffuse reflection structure 80 is embedded in the lower part 14 and is in direct contact with the light emitting surface 92 of the light emitting part 91. The diffuse reflection structure 80 may be configured such that light is diffusely reflected by the surface of the diffuse reflection structure 80, or may be configured such that light is diffusely reflected inside the diffuse reflection structure 80. When the diffuse reflection structure 80 is configured such that light is diffusely reflected by its surface, at least a part 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 its cross-sectional shape is curved. By doing so, light can be scattered in more various directions. The shape of the convex portion and the shape of the concave portion of the uneven surface of the diffuse reflection structure 80 are not particularly limited, but for example, they can be in the shapes of a hemisphere, a dome, a conical shape, a pyramid shape (square pyramid shape), other pyramid shapes, a frustum of a cone shape, a frustum of a pyramid shape, etc. The convex portions and the concave portions of the uneven surface may be arranged regularly (periodically) or irregularly. Also, 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. Further, the diameters (equivalent circular diameters) of the concave portions and the convex portions of the uneven surface of the diffuse reflection structure 80 are preferably equal to or larger than the wavelength region of visible light, respectively. When the diffuse reflection structure 80 is configured such that light is diffusely reflected inside it, the diffuse reflection structure 80 is, for example, composed of a light-transmissive resin material containing a light-scattering material. The light-scattering material is not particularly limited, but for example, it can be inorganic particles (including pigments, colorants, metal powders, etc.) such as titanium oxide, zirconia, mica, alumina, silica, and organic particles (including pigments, colorants, etc.) such as acrylic resins, urethane resins, polycarbonate resins, polystyrene resins, etc. Also, inside the diffuse reflection structure 80, voids may be contained, or it may have an uneven structure portion formed by combining two uneven surfaces with each other.

[0034] <Modification Example 3 of the First Embodiment> Next, Modification Example 3 of the First Embodiment will be described with reference to FIG. 6. The liquid injection port 100 according to the modification example is different from the liquid injection ports 100 according to the above-described First Embodiment and Modification Examples 1 and 2 in the points described below, and in other points, it is configured in the same manner as the liquid injection ports 100 according to the above-described First Embodiment and Modification Examples 1 and 2.

[0035] Also in the case of a modified example, similar to the first embodiment, the housing portion 10 has an upper portion 12 and a lower portion 14 that surrounds the periphery of the concave portion 52, and the upper portion 12 and the lower portion 14 are assembled to each other. However, in the case of this modified example, at least the light emitting surface 92 of the light emitting portion 91 is embedded in the upper portion 12 or directly faces the upper portion 12. The lower portion 14 is light-shielding, and light is selectively radiated from the outer surface of the upper portion 12 among the outer surface of the upper portion 12 and the outer surface of the lower portion 14. Even with such a configuration, by visually recognizing the light radiated from the upper surface 12a of the upper portion 12, the position of the liquid injection port 100 from outside the body, and further the puncture position of the puncture needle (not shown) at the liquid injection port 100 can be easily recognized from outside the body. Note that "directly facing the upper portion 12" means that the light emitting surface 92 is in contact with the upper portion 12 or the light emitting surface 92 faces the upper portion 12 with a gap therebetween.

[0036] As shown in FIG. 6, the light emitting portion 91 and the coil 96 are respectively embedded in the lower portion 14. In the example shown in FIG. 6, a part of the light emitting portion 91 is embedded in the lower portion 14. Also, a gap is formed between the light emitting surface 92 and the upper portion 12, and the light emitting surface 92 faces the upper portion 12 through the gap. The light emitting surface 92 of the light emitting portion 91 is arranged facing the upper portion 12 side. However, for example, a light-transmissive resin may be arranged in the gap between the light emitting surface 92 and the upper portion 12, and the light emitting surface 92 may face the upper portion 12 through the light-transmissive resin. The light output from the light emitting portion 91 passes through the inside of the upper portion 12 and is radiated from the upper surface 12a.

[0037] The upper portion 12 is made of, for example, a light-transmissive resin material. This resin material is not particularly limited, but for example, it may be the same type of material as the light-transmissive resin material exemplified in the first embodiment. On the other hand, the lower portion 14 is made of a light-shielding resin material. This resin material is not particularly limited, but for example, it may be a resin material containing a pigment, a coloring material, or the like.

[0038] <Modification Example 4 of the First Embodiment> Next, Modification Example 4 of the First Embodiment will be described with reference to FIG. 7. The liquid injection port 100 according to each modification example is different from the liquid injection port 100 according to the above-described Modification Example 3 in the points described below, and is configured in the same manner as the liquid injection port 100 according to the above-described Modification Example 3 in other points.

[0039] As shown in FIG. 7, in the case of this modification example, a light-emitting portion 91 is embedded in the lower portion 14, and an embedded portion 18 made of a light-transmissive resin material is disposed between the light-emitting surface 92 of the light-emitting portion 91 and the upper portion 12. By doing so, the light output from the light-emitting portion 91 passes through the embedded portion 18 and is guided to the inside of the upper portion 12. Therefore, by visually recognizing the light radiated from the upper surface 12a of the upper portion 12, the position of the liquid injection port 100 from outside the body, and further, the puncture position of the puncture needle (not shown) in the liquid injection port 100 can be easily recognized from outside the body. In the example shown in FIG. 7, the embedded portion 18 is disposed on the light-emitting surface 92 and is disposed in a state of surface contact with the light-emitting surface 92.

[0040] 〔Second Embodiment〕 Next, the Second Embodiment will be described with reference to FIG. 8. The liquid injection port 100 according to this embodiment is different from the liquid injection port 100 according to the above-described First Embodiment in the points described below, and is configured in the same manner as the liquid injection port 100 according to the above-described First Embodiment in other points.

[0041] In the case of this embodiment, the upper portion 12 of the housing portion 10 directly abuts against the side peripheral surface 20a of the plug body 20 and holds the plug body 20. And the upper portion 12 of the housing portion has a higher refractive index than the plug body 20. This suppresses the light passing through the lower part 14 and reaching the interface between the upper part 12 and the plug body 20 from entering the interior of the plug body 20, and further enables the light to be reflected inside the upper part 12. Therefore, the ratio of the light radiated to the outside among the light reaching the interface between the upper part 12 and the plug body 20 can be improved, so that the light can be radiated more widely and uniformly on the upper surface 12a of the upper part 12.

[0042] As shown in FIG. 8, in the case of the present embodiment, the plug body 20 is sandwiched from above and below by the upper part 12 and the lower part 14 without passing through a metal annular frame body. The second inclined surface 13b of the upper part 12 is in surface contact with the fourth inclined surface 20b of the plug body 20. Thus, in the case of the present embodiment, since the liquid injection port 100 does not include a metal annular frame body, heat generation that occurs when performing an examination on a living body in which the liquid injection port 100 is embedded in the body using, for example, a magnetic resonance imaging apparatus (not shown) can be suppressed.

[0043] <Modification of the Second Embodiment> Next, a modification of the second embodiment will be described with reference to FIG. 9. The liquid injection port 100 according to this modification is different from the liquid injection port 100 according to the above-described second embodiment in the points described below, and is configured in the same manner as the liquid injection port 100 according to the above-described second embodiment in other points.

[0044] Also in the case of this modification, similar to the second embodiment, the upper part 12 of the housing part 10 is directly in contact with the side peripheral surface 20a of the plug body 20 and holds the plug body 20. However, in the case of this modification, similar to Modifications 3 and 4 of the first embodiment, the lower part 14 is light-shielding, and light is selectively radiated from the outer surface of the upper part 12 among the outer surface of the upper part 12 and the outer surface of the lower part 14. Even with such a configuration, by visually recognizing the light radiated from the upper surface 12a of the upper part 12, the position of the liquid injection port 100 from outside the body, and further the puncture position of the puncture needle (not shown) in the liquid injection port 100 can be easily recognized from outside the body.

[0045] More specifically, in the example shown in FIG. 9, a part of the light-emitting portion 91 is embedded in the lower portion 14. Also, a gap is formed between the light-emitting surface 92 and the upper portion 12, and the light-emitting surface 92 faces the upper portion 12 through the gap. The light-emitting surface 92 of the light-emitting portion 91 is arranged facing the upper portion 12 side. However, for example, a light-transmissive resin may be arranged in the gap between the light-emitting surface 92 and the upper portion 12, and the light-emitting surface 92 may face the upper portion 12 through the light-transmissive resin.

[0046] The present invention is not limited to the above-described embodiments, and includes various modifications, improvements, etc. as long as the object of the present invention is achieved. Also, the above-described embodiments can be appropriately combined without departing from the gist of the present invention.

[0047] For example, in the above, an example in which the light-transmissive resin material contains a light-scattering material has been described, but it is also preferable that the light-transmissive resin material contains, for example, a fluorescent material. By doing so, when the housing portion 10 is irradiated with light, the fluorescent material contained in the housing portion 10 becomes a point light source. Therefore, inside the housing portion 10, the fluorescent materials serving as point light sources are scattered, and light is transmitted between the fluorescent materials. In this way, a light chain occurs inside the housing portion 10, so that the entire housing portion 10 can be made to emit light.

[0048] Also, for example, at least a part of the outer surface of the housing portion 10 may be a concavo-convex surface that diffusely reflects light. By doing so, the concavo-convex surface can scatter light in more various directions, so that even when a light source with high directivity such as an LED is used as the light-emitting portion 91, light can be uniformly radiated from the entire upper surface 12a of the upper portion 12. The uneven surface is not particularly limited, but for example, its cross-sectional shape is preferably curved. By doing so, light can be scattered in more various directions. The shape of the convex part and the concave part of the convex surface is not particularly limited, but for example, it can be in the shape of a hemisphere, a dome, a cone, a pyramid (square pyramid), other pyramid shapes, a frustum of a cone, a frustum of a pyramid, etc. The convex parts and the concave parts of the uneven surface may be arranged regularly (periodically) or irregularly. Further, the uneven surface may be, for example, a diamond cut surface, a crystal cut surface, a prism surface, a rough surface, or the like. Further, the diameters (equivalent circular diameters) of the concave part and the convex part of the uneven surface are preferably equal to or larger than the wavelength region of visible light, respectively. For example, when the upper surface 12a of the upper part 12 is an uneven surface, total reflection can be suppressed on the upper surface 12a by the uneven surface, so that the ratio of the light radiated to the outside among the light incident on the upper part 12 can be further improved. Further, for example, when the side circumferential surfaces of each of the upper part 12 and the lower part 14 or the lower surface of the upper part 12 are uneven surfaces, the light scattered in various directions by the uneven surfaces enters the inside of the housing part 10, so that the light can reach the upper surface 12a of the upper part 12 evenly. In this case, it is preferable that the light emitting part 91 is arranged in the vicinity of the formation region of the uneven surface on the outer surface of the housing part 10. In the present invention, the housing part 10 may include, for example, two or more of the above-described light scattering material, fluorescent material, void, diffuse reflection structure 80, uneven structure part 29, and uneven surface.

[0049] This embodiment includes the following technical ideas. (1) A liquid injection port that is retained in a state of being embedded in the body, A housing part having a recess that constitutes a liquid reservoir for temporarily storing the liquid supplied from the outside of the body, A plug body that closes the opening of the recess, A liquid introduction connector that communicates with the liquid reservoir and is connected to a catheter, A light-emitting part embedded in the housing part, comprising, at least the upper part of the housing part is made of a light-transmissive resin material, the upper part of the housing part surrounds the periphery of the plug body, A liquid injection port in which, when the light-emitting part emits light, the light passes through the inside of at least the upper part of the housing part and is radiated from the upper surface of at least the upper part of the housing part. (2) Comprising a coil that receives power by non-contact power supply, The liquid injection port according to (1), wherein the power received by the coil is supplied to the light-emitting part, and the light-emitting part emits light. (3) The housing part, the upper part, a lower part surrounding the periphery of the recess, having, the upper part and the lower part are assembled to each other, each of the upper part and the lower part is made of a light-transmissive resin material, The liquid injection port according to (1) or (2), wherein the light-emitting part is embedded in the lower part. (4) The liquid injection port according to claim 3, wherein light is radiated from each of the outer surface of the upper part and the outer surface of the lower part. (5) The housing part, the upper part, a lower part surrounding the periphery of the recess, having, the upper part and the lower part are assembled to each other, at least the light-emitting surface of the light-emitting part is embedded in the upper part or faces the upper part directly, the lower part is light-shielding, The liquid injection port according to (1) or (2), wherein light is selectively radiated from the outer surface of the upper part among the outer surface of the upper part and the outer surface of the lower part. (6) The housing part, the upper part, a lower part surrounding the periphery of the recess, having, The upper part and the lower part are assembled with each other, the lower part is light-shielding, the light-emitting part is embedded in the lower part, and an embedded part made of a light-transmissive resin material is disposed between the light-emitting surface of the light-emitting part and the upper part, a liquid injection port according to (1) or (2), wherein light is selectively emitted from the outer surface of the upper part among the outer surface of the upper part and the outer surface of the lower part. (7) The liquid injection port according to any one of (1) to (6), wherein the light-transmissive resin material contains a light-scattering material. (8) The liquid injection port according to any one of (1) to (7), wherein the light-transmissive resin material contains a fluorescent material. (9) The liquid injection port according to any one of (1) to (8), wherein the light-transmissive resin material has voids inside that scatter light. (10) The liquid injection port according to any one of (1) to (9), wherein at least a part of the outer surface of the housing part is an uneven surface that diffusely reflects light. (11) The liquid injection port according to any one of (1) to (10), wherein a diffuse reflection structure that diffusely reflects light is disposed between the light-emitting part and the light-transmissive resin material. (12) The liquid injection port according to any one of (1) to (11), wherein the outer peripheral surface of the upper part of the housing part includes a first inclined surface that inclines upward so as to approach the central axis side of the plug body. (13) The liquid injection port according to any one of (1) to (12), wherein the inner peripheral surface of the upper part of the housing part includes a second inclined surface that inclines upward so as to approach the central axis side of the plug body. (14) It includes a metal annular frame surrounding the periphery of the plug body, (15) The liquid injection port according to any one of (1) to (13), wherein the outer peripheral surface of the frame includes a third inclined surface that inclines upward so as to approach the central axis side of the plug body. (15) The upper part of the housing part directly abuts against the side peripheral surface of the plug body and holds the plug body, The liquid injection port according to any one of (1) to (13), wherein the upper part of the housing portion has a higher refractive index than the plug body. (16) The liquid injection port according to any one of (1) to (15), wherein the plug body is made of a light-shielding resin material.

Explanation of reference numerals

[0050] 10 Housing portion 12 Upper part 12a Upper surface 12b Opening 13a First inclined surface 13b Second inclined surface 14 Lower part 16 Cavity portion 18 Embedded portion 20 Plug body 20a Side peripheral surface 20b Fourth inclined surface 21 Protrusion 22 Upper surface 24 Lower surface 26 Recess 28 Protrusion 36 Connector portion 50 Liquid reservoir portion 52 Recess 54 Side surface 56 Opening 58 Communication hole 60 Upper frame 61 Cylindrical portion 62 Reduced diameter portion 60a Third inclined surface 70 Lower frame 71 Cylindrical portion 72 Inner flange portion 80 Diffuse reflection structure 91 Light emitting portion 92 Light emitting surface 96 Coil 100 Liquid injection port AX axis

Claims

1. A liquid injection port that is indwelled in a state of being implanted in the body, comprising: a housing portion having a recess that forms a liquid reservoir portion for temporarily storing a liquid supplied from outside the body; a plug body that closes the opening of the recess; a liquid introduction connector that communicates with the liquid reservoir portion and is connected to a catheter; a light emitting portion embedded in the housing portion; and comprising; at least an upper portion of the housing portion is made of a light-transmissive resin material; the upper portion of the housing portion surrounds the periphery of the plug body; when the light emitting portion emits light, the light passes through the inside of at least the upper portion of the housing portion and is radiated from the upper surface of at least the upper portion of the housing portion; the inner peripheral surface of the upper portion of the housing portion includes a second inclined surface that is inclined upward so as to approach the central axis side of the plug body; the light emitting portion is disposed outside the second inclined surface in the radial direction of the plug body and is disposed below the second inclined surface in the vertical direction; the light emitting portion is disposed above the lower surface of the plug body, and is a liquid injection port.

2. The liquid injection port according to claim 1, wherein a light emitting surface of the light emitting portion is inclined downward so as to approach the central axis side of the plug body.

3. Comprising a coil that receives power by non-contact power supply; The liquid injection port according to claim 1 or 2, wherein the power received by the coil is supplied to the light emitting portion, and the light emitting portion emits light.

4. The housing portion has the upper portion and a lower portion that surrounds the periphery of the recess; and has; the upper portion and the lower portion are assembled to each other; each of the upper portion and the lower portion is made of a light-transmissive resin material; The liquid injection port according to any one of claims 1 to 3, wherein the light emitting portion is embedded in the lower portion.

5. The liquid injection port according to claim 4, wherein light is radiated from each of the outer surface of the upper portion and the outer surface of the lower portion.

6. The housing portion has the upper portion and a lower portion that surrounds the periphery of the recess; and has; the upper portion and the lower portion are assembled to each other; at least the light emitting surface of the light emitting portion is embedded in the upper portion or faces the upper portion directly; the lower portion is light-shielding; The liquid injection port according to any one of claims 1 to 3, wherein light is selectively radiated from the outer surface of the upper portion among the outer surface of the upper portion and the outer surface of the lower portion.

7. The housing part includes the upper part, the lower part surrounding the periphery of the concave part, and has the upper part and the lower part are assembled to each other, the lower part is light-shielding, the light-emitting part is embedded in the lower part, and an embedded part made of a light-transmissive resin material is arranged between the light-emitting surface of the light-emitting part and the upper part, The liquid injection port according to any one of claims 1 to 3, wherein light is selectively radiated from the outer surface of the upper part among the outer surface of the upper part and the outer surface of the lower part.

8. The liquid injection port according to any one of claims 1 to 7, wherein the light-transmissive resin material contains a light-scattering material.

9. The liquid injection port according to any one of claims 1 to 8, wherein the light-transmissive resin material contains a fluorescent material.

10. The liquid injection port according to any one of claims 1 to 9, wherein the light-transmissive resin material has voids inside for scattering light.

11. The liquid injection port according to any one of claims 1 to 10, wherein at least a part of the outer surface of the housing part is an uneven surface for irregularly reflecting light.

12. The liquid injection port according to any one of claims 1 to 11, wherein a diffuse reflection structure for irregularly reflecting light is arranged between the light-emitting part and the light-transmissive resin material.

13. The liquid injection port according to any one of claims 1 to 12, wherein the outer peripheral surface of the upper part of the housing part includes a first inclined surface inclined upward so as to approach the central axis side of the plug body.

14. It includes a metal annular frame surrounding the periphery of the plug body, The liquid injection port according to any one of claims 1 to 13, wherein the outer peripheral surface of the frame includes a third inclined surface inclined upward so as to approach the central axis side of the plug body.

15. The upper part of the housing part directly abuts against the side peripheral surface of the plug body and holds the plug body, The liquid injection port according to any one of claims 1 to 13, wherein the upper part of the housing part has a higher refractive index than the plug body.

16. The liquid injection port according to any one of claims 1 to 15, wherein the plug body is made of a light-shielding resin material.

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