Liquid Injection Port

Abstract

To provide a liquid injection port capable of recognizing a position of a liquid injection port from outside the body.SOLUTION: A liquid injection port 100 which is detained in the state that it is embedded in the body includes: a housing part 10 which has a recess 52 composing a liquid reservoir 50 temporarily reserving liquid supplied from outside the body; a plug body 20 closing an opening 56 of the recess 52; a liquid introduction connector which communicates with the liquid reservoir 50 and is connected to the catheter; and a light emitting part 91 embedded in the housing part 10. The housing part 10 encircles the plug body 20. The housing part 10 has: a light transmission part 18 composed of a light transmissive resin material; and a light shielding part 19 composed of a light shielding resin material. The light emitting part 91 emits light, so that the light passes inside the light transmission part 18 and is emitted at least from the upper surface 11 of the housing part 10.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 embedded in the housing portion; Equipped with The housing portion surrounds the plug, the housing portion has a light transmitting portion made of a light transmitting resin material and a light blocking portion made of a light blocking resin material, The liquid injection port provides a liquid injection port in which, when the light emitting portion emits light, the light passes through the inside of the light transmitting portion and is emitted from at least the upper surface of the housing portion. 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 an embodiment. [Diagram 2] FIG. 2 is a plan view of a liquid injection port according to an embodiment. [Diagram 3] FIG. 3(a) is a side cross-sectional view of a liquid injection port according to the embodiment, and FIG. 3(b) is a partially enlarged view of part A shown in FIG. 3(a). [Figure 4] FIG. 4(a) is a side cross-sectional view of a liquid injection port according to the first modified example of the embodiment, and FIG. 4(b) is a partially enlarged view of part A shown in FIG. 4(a). [Diagram 5] FIG. 5(a) is a side cross-sectional view of a liquid injection port according to a second modified example of the embodiment, and FIG. 5(b) is a partially enlarged view of part A shown in FIG. 5(a). [Figure 6] FIG. 6(a) is a side cross-sectional view of a liquid injection port according to a third modified example of the embodiment, and FIG. 6(b) is a partially enlarged view of part A shown in FIG. 6(a). [Figure 7] FIG. 7(a) is a side cross-sectional view of a liquid injection port according to a fourth modified example of the embodiment, and FIG. 7(b) is a partially enlarged view of part A shown in FIG. 7(a). [Figure 8]FIG. 8(a) is a side cross-sectional view of a liquid injection port according to a fifth modified example of the embodiment, and FIG. 8(b) is a partially enlarged view of part A shown in FIG. 8(a). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Embodiment] Hereinafter, an 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(a)) and bottom side (lower side in FIG. 3(a)) 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(b), the liquid injection port 100 of this embodiment 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 an 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 (not shown), and a light-emitting portion 91 embedded in the housing portion 10. The housing portion 10 surrounds the stopper body 20, and has a light-transmitting portion 18 made of a light-transmitting resin material (light-transmitting to visible light), and a light-shielding portion 19 made of a light-shielding resin material (light-shielding to visible light).When the light-emitting portion 91 emits light, the light passes through the inside of the light-transmitting portion 18 and is emitted from at least the upper surface 11 of the housing portion 10. Here, "light passes through the inside of the light transmitting portion 18 and is emitted from at least the top surface 11 of the housing portion 10" means that the emitted light is visible when viewed from the top surface 11 side of the housing portion 10.

[0011] According to this embodiment, when the light emitting portion 91 emits light, the light passes through the inside of the light transmitting portion 18 and is emitted from at least the upper surface 11 of the housing portion 10. Therefore, by visually recognizing the light emitted from the upper surface 11 of the housing portion 10, it becomes possible to recognize the position of the liquid injection port 100 from outside the body. Therefore, the surgeon can easily recognize the puncture position of the puncture needle (not shown) in the liquid injection port 100 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. In the present embodiment, the plug 20 is made of a light-shielding resin material. This allows the plug 20 and the housing 10 to selectively emit light. That is, the light output from the light emitting unit 91 is favorably emitted around the plug 20, while the light is not substantially emitted from the plug 20. This makes it 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 is imparted with light-shielding properties by containing pigments, colorants, etc., such as carbon black and titanium. In the present embodiment, as described above, the liquid injection port 100 includes a metal ring-shaped frame surrounding the plug 20. Therefore, the metal ring-shaped frame also prevents the light generated by the light emitting unit 91 from entering the plug 20, and a configuration can be realized in which light is selectively emitted from at least the upper surface 11 of the plug 20 and the housing 10.

[0016] In this embodiment, the metal annular frame directly surrounds the periphery of the plug 20. Therefore, the inner peripheral surface of the lower frame 70 contacts the outer peripheral surface of the plug 20. More specifically, the stopper body 20 includes, for example, an insertion portion 20a that is inserted into the opening 56 of the liquid reservoir portion 50, a main portion 20b that is surrounded by a ring-shaped frame body, and a small diameter portion 20c that is formed with a relatively small diameter and protrudes upward from the upper opening of the frame body, and of these, the upper surface of the small diameter portion 20c forms the upper surface 22 of the stopper body 20. Moreover, 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 24 of the plug 20 as a single piece of material, 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 24 of the plug 20.

[0017] 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.

[0018] 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(a), 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 small diameter portion 20c 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 (the upper surface of the small diameter portion 20c) 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.

[0019] 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.

[0020] 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(a), the base end of the connector portion 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 portion 36 and the inner diameter of the communication hole 58 are substantially equal, so that the liquid stored in the liquid reservoir 50 can smoothly flow into the connector portion 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.

[0021] 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(a), 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.

[0022] 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.

[0023] In this embodiment, the light transmitting portion 18 is disposed at least directly above the light emitting portion 91, as shown in FIG. This allows the light output from the light emitting portion 91 to efficiently enter the inside of the light transmitting portion 18 .

[0024] More specifically, as shown in Figures 1 to 3(a), the liquid injection port 100 has, for example, a plurality of (e.g., four) light-emitting portions 91 and a number of light-transmitting portions 18 corresponding to the number of light-emitting portions 91, and each light-transmitting portion 18 is positioned directly above each light-emitting portion 91. Each light emitting portion 91 is disposed, for example, on the peripheral edge of the opening 12a in the upper portion 12 (light blocking portion 19). Each light emitting portion 91 is disposed at equal angular intervals around the central axis AX (see FIG. 3(a)) of the plug 20. Similarly, each light transmitting portion 18 is disposed on the peripheral edge of the opening 12a in the upper portion 12, and is disposed at equal angular intervals around the central axis AX of the plug 20. As a result, multiple points around the puncture position of the liquid injection port 100 will emit light, so the surgeon can more reliably guide the puncture needle through the stopper body 20 to the liquid collection section 50 by inserting the puncture needle inside the area (puncture position) surrounded by the multiple light-emitting points in the liquid injection port 100. 2 and 3(b), the upper portion 12 has a plurality of (for example, four) recesses 16 formed therein that open to the upper surface of the upper portion 12, and one light emitting portion 91 is disposed inside each recess 16. The light emitting surface 92 of the light emitting portion 91 faces the upper surface 11 of the housing portion 10 (upward) and is disposed horizontally. The opening of each recess 16 is sealed by one light-transmitting portion 18, and for example, the lower surface of the light-transmitting portion 18 is in surface contact with the light-emitting surface 92 of the light-emitting portion 91. In other words, the light output from the light-emitting portion 91 is configured to directly enter the light-transmitting portion 18. However, for example, another light-transmitting member may be disposed between the light-emitting unit 91 and the light-transmitting unit 18, and a part of the light output from the light-emitting unit 91 may pass through the inside of the light-transmitting member and enter the light-transmitting unit 18. Also, for example, a gap may be interposed between the light-emitting unit 91 and the light-transmitting unit 18. In plan view, it is preferable that at least a portion of the light emitting surface 92 of the light emitting portion 91 overlaps with the light transmitting portion 18. In the case of this embodiment, in plan view, each of the light emitting portion 91 and the light transmitting portion 18 is formed in a circular shape. The outer diameter of the lower surface of the light transmitting portion 18 is set, for example, to be approximately equal to the outer diameter of the light emitting surface 92, and in plan view, the entire light emitting surface 92 of the light emitting portion 91 overlaps with the lower surface of the light transmitting portion 18. In the case of this embodiment, the outer diameter of the light transmitting portion 18 is approximately constant regardless of the position of the light transmitting portion 18 in the axial direction. In addition, in this embodiment, each light-emitting portion 91 and each light-transmitting portion 18 is positioned inside the cylindrical portion 71 of the lower frame 70 (radially inside the cylindrical portion 71) and above the upper surface of the upper frame 60. However, for example, each of the light-emitting portions 91 and each of the light-transmitting portions 18 may be positioned outside the annular frame body (radially outside the frame body), or may be positioned below the inner flange portion 62 of the upper frame 60.

[0025] The light-emitting unit 91 is not particularly limited, but an example thereof 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 may be multiple as in this embodiment.

[0026] 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 each light-emitting unit 91 via wiring (not shown), and 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 each light-emitting unit 91. The coil 96 is, for example, embedded in the upper portion 12 and disposed above the annular frame. The coil 96 is disposed so as to surround the liquid reservoir 50 in plan view. More specifically, the coil 96 is disposed above each of the fitting portion 20a and the main portion 20b of the plug 20, and disposed around the small diameter portion 20c of the plug 20.

[0027] Here, the outer surfaces of both the light transmitting portion 18 and the light blocking portion 19 each constitute a part of the outer surface of the housing portion 10 . More specifically, in this embodiment, the outer surfaces of both the light transmitting portion 18 and the light blocking portion 19 each form a part of the upper surface 11 of the housing portion 10 . This allows a configuration in which, when the light-emitting portion 91 emits light, light is locally emitted from one portion of the upper surface 11 (the outer surface of the light-transmitting portion 18), while substantially no light is emitted from the other portion of the upper surface 11 (the outer surface of the light-shielding portion 19). Therefore, the surgeon can visually distinguish between the portion of the liquid injection port 100 from which light is emitted and the portion of the liquid injection port 100 from which light is not emitted.

[0028] As shown in FIGS. 2 and 3(a), in this embodiment, the outer surface of the light-shielding portion 19 surrounds the outer surface of the light-transmitting portion 18 on the upper surface 11 of the housing portion 10. As shown in FIG. This makes it possible to configure the light output from the light emitting unit 91 to be emitted from the outer surface of the light transmitting unit 18, while the light is not substantially emitted from around the outer surface of the light transmitting unit 18. This makes the visual difference between the portion of the liquid injection port 100 where light is emitted and the portion where light is not emitted clearer.

[0029] Furthermore, it is preferable that the light transmitting portion 18 has a higher refractive index than the light blocking portion 19 . In this way, it is possible to suppress the light that enters the light transmitting portion 18 and reaches the interface between the light transmitting portion 18 and the light blocking portion 19 from entering the light blocking portion 19, and further to make the light more likely to be reflected into the light transmitting portion 18. Therefore, it is possible to increase the proportion of light that is radiated to the outside out of the light that reaches the interface between the light transmitting portion 18 and the light blocking portion 19, and therefore it is possible to radiate the light more widely and uniformly on the outer surface of the light transmitting portion 18.

[0030] As shown in Figures 3(a) and 3(b), as an example, the upper surface 11 of the housing portion 10 is composed of an upper surface 18a of the light-transmitting portion 18 and an upper surface 19a of the light-shielding portion 19, and when the light-emitting portion 91 emits light, light is emitted from the upper surface 18a of the light-transmitting portion 18. More specifically, in the present embodiment, the upper portion 12 constitutes the light-shielding portion 19, and the upper surface of the upper portion 12 constitutes the upper surface 19a of the light-shielding portion 19. Thus, the light-shielding portion 19 surrounds the periphery of the upper portion of the plug 20, and the periphery of the portion of the upper surface 22 of the plug 20 that is exposed to the outside is surrounded by the upper surface 19a of the light-shielding portion 19. This makes it possible to realize a configuration in which the light-shielding portion 19 prevents the light output from the light-emitting portion 91 from entering the inside of the plug 20, and selectively radiates light from the housing portion 10 out of the plug 20 and the housing portion 10. The light-shielding portion 19 (upper portion 12) is preferably made of, for example, an opaque (opaque to visible light) resin material. In the present embodiment, the light-shielding portion 19 is made of, for example, a resin material containing a pigment or colorant such as carbon black or titanium, thereby providing light-shielding properties. The lower portion 14 may be made of a light-transmitting resin or a light-shielding resin material. As described above, the light transmitting portion 18 seals the openings of the multiple recesses 16 formed in the upper portion 12 (light blocking portion 19). The upper surface 18a of the light transmitting portion 18 is exposed on the upper surface of the upper portion 12 (upper surface 19a of the light blocking portion 19), and constitutes a part of the upper surface 11 of the housing portion 10. The upper surface 18a of the light transmitting portion 18 is disposed flush with the upper surface 19a of the light blocking portion 19, for example. In addition, the periphery of the side peripheral surface of the light-transmitting portion 18 is surrounded by the light-shielding portion 19, and the side peripheral surface is in direct contact with the light-shielding portion 19. As a result, the light output from the light-emitting portion 91 is guided to the upper surface 11 of the housing portion 10 using the light-transmitting portion 18 as an optical waveguide. However, the entire periphery of the side surface of the light transmitting portion 18 does not necessarily have to be surrounded by the light blocking portion 19. For example, only a portion of the side surface of the light transmitting portion 18 may be surrounded by a frame.

[0031] Here, the light transmitting portion 18 preferably contains a light scattering material. By doing this, the light can be scattered in various directions by the light scattering material at various points in the light-transmitting section 18, 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 18a of the light-transmitting section 18. The light scattering material is not particularly limited, but examples thereof include inorganic particles (including pigments, colorants, metal powder, etc.) such as titanium oxide, zirconia, mica, alumina, silica, etc., and organic particles (including pigments, colorants, etc.) such as acrylic resins, urethane resins, polycarbonate resins, polystyrene resins, etc. 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.

[0032] 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, by non-contact power supply 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 selectively emitted from a plurality of points (upper surface 18a of the light transmitting portion 18) around the upper surface 22 of the plug 20 and the housing portion 10. Therefore, by inserting the puncture needle into the inside of the area (puncture position) surrounded by the plurality of light emitting points in the liquid injection port 100, the surgeon can more reliably make the puncture needle reach the liquid reservoir portion 50 through the plug 20. Furthermore, in the case of this embodiment, as described above, when the light-emitting portion 91 emits light, light is locally emitted from one portion of the upper surface 11 (the outer surface of the light-transmitting portion 18), while substantially no light is emitted from the other portion of the upper surface 11 (the outer surface of the light-shielding portion 19). Therefore, the surgeon can more clearly see the visual difference between the portion where light is emitted and the portion where light is not emitted in the liquid injection port 100.

[0033] <Variation 1> Next, a first modified example of the embodiment will be described with reference to FIG. 4(a) and FIG. 4(b). The liquid injection port 100 of this embodiment differs from the liquid injection port 100 of the above embodiment in the respects described below, but is otherwise configured in the same manner as the liquid injection port 100 of the above embodiment.

[0034] In this modified example, as shown in FIGS. 4(a) and 4(b), the light transmitting portion 18 has a planar cross-sectional area that narrows toward the upper surface 11 of the housing portion 10. This makes it possible to concentrate the light that has entered the inside of the light transmitting portion 18 toward the upper surface 18a of the light transmitting portion 18, thereby improving the intensity of the light emitted from the upper surface 18a. In this modified example, each light transmitting portion 18 has a substantially truncated cone shape with its axial direction extending in the vertical direction.

[0035] <Variation 2> Next, a second modified example of the embodiment will be described with reference to FIG. 5(a) and FIG. 5(b). The liquid injection port 100 of this embodiment differs from the liquid injection port 100 of the above-described 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 embodiment and variant 1.

[0036] In this modified example, the light transmitting portion 18 has voids therein that scatter light. As a result, light can be scattered in various directions by the voids in various parts of the light-transmitting section 18, 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 18a of the light-transmitting section 18. For example, the voids can be formed by heating a light-transmitting resin material that has a foaming agent mixed in. In addition, for example, when molding the light-transmitting portion 18, 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.

[0037] <Modification 3 of the First Embodiment> Next, a third modified example of the embodiment will be described with reference to FIG. 6(a) and FIG. 6(b). The liquid injection port 100 of this embodiment differs from the liquid injection port 100 of the above-described embodiment and variants 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 embodiment and variants 1 and 2.

[0038] In this modified example, as shown in FIGS. 6(a) and 6(b), the light transmitting portion 18 has a planar cross-sectional area that increases toward the upper surface 11 of the housing portion 10. This makes it possible to reduce the proportion of light output from the light-emitting portion 91 that is absorbed by the light-shielding portion 19 and consumed as heat, thereby improving the proportion of that light that passes through the inside of the light-transmitting portion 18 and is emitted from the upper surface 18a. In this modified example, each light transmitting portion 18 has a generally inverted truncated cone shape.

[0039] <Fourth Modification of the First Embodiment> Next, a fourth modified example of the embodiment will be described with reference to FIG. 7(a) and FIG. 7(b). The liquid injection port 100 of this modified example differs from the liquid injection port 100 of the above-described embodiment and modified examples 1 to 3 in the respects described below, but is otherwise configured in the same manner as the liquid injection port 100 of the above-described embodiment and modified examples 1 to 3.

[0040] In this modified example, as shown in FIGS. 7(a) and 7(b), the boundary between the light transmitting portion 18 and the light blocking portion 19 is on the side surface of the housing portion 10, not on the top surface 11 of the housing portion 10. More specifically, the upper surface 18a of the light-transmitting portion 18 constitutes the entire upper surface 11 of the housing portion 10, and the side surfaces of both the light-transmitting portion 18 and the light-shielding portion 19 constitute a portion of the side surfaces of the housing portion 10. More specifically, for example, upper portion 12 is divided into two parts, top and bottom, with light-transmitting portion 18 constituting the upper portion of upper portion 12 and light-shielding portion 19 constituting the lower portion of upper portion 12. A recess 16 that opens to an upper surface 19a of the light shielding portion 19 is formed in the light shielding portion 19, and the light emitting portion 91 is disposed, for example, inside the recess 16. A light emitting surface 92 of the light emitting portion 91 is disposed flush with the upper surface 19a of the light shielding portion 19. A lower surface of the light transmitting portion 18 is in surface contact with each of the light emitting surface 92 and the upper surface 19a of the light shielding portion 19. In the light transmitting portion 18, the area of ​​the surface facing the light emitting surface 92 may be larger or smaller than the area of ​​the light emitting surface 92. In the present modified example, the area of ​​the lower surface (the surface facing the light emitting surface 92) of the light transmitting portion 18 is larger than the area of ​​the light emitting surface 92.

[0041] <Variation 5> Next, a fifth modified example of the embodiment will be described with reference to FIG. 8(a) and FIG. 8(b). The liquid injection port 100 of this modified example differs from the liquid injection port 100 of the above-described embodiment and modified examples 1 to 4 in the respects described below, but is otherwise configured in the same manner as the liquid injection port 100 of the above-described embodiment and modified examples 1 to 4.

[0042] In this modified example, as shown in FIGS. 8(a) and 8(b), a diffuse reflection structure 80 that diffusely reflects light is disposed between a light emitting portion 91 and a light transmitting portion 18. As shown in FIG. As a result, the light scattered in various directions by the diffuse reflection structure 80 enters the inside of the light-transmitting portion 18, so that even when a highly directional light source such as an LED is used as the light-emitting portion 91, light can be emitted uniformly from the upper surface 18a of the light-transmitting portion 18. In the present modified example, the diffuse reflection structure 80 is in direct contact with the light emitting surface 92 of the light emitting portion 91 and also in direct contact with the lower surface of the light transmitting portion 18 . More specifically, the diffuse reflection structure 80 is disposed in the recess 16 of the light-shielding portion 19 between the light-transmitting portion 18 and the light-emitting surface 92. The periphery (side peripheral surface) of the diffuse reflection structure 80 is surrounded by the light-shielding portion 19. 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.

[0043] 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.

[0044] For example, in the above description, the light transmitting portion 18 contains a light scattering material, but it is also preferable that the light transmitting portion 18 contains, for example, a fluorescent material. In this way, when light is irradiated onto the light transmitting section 18, the fluorescent material contained in the light transmitting section 18 becomes a point light source. Therefore, the fluorescent material that becomes a point light source is scattered inside the light transmitting section 18, and light is transmitted between each fluorescent material. In this way, a chain of light is generated inside the light transmitting section 18, so that the entire light transmitting section 18 can be made to shine.

[0045] Furthermore, for example, at least a portion of the upper surface 18a of the light transmitting portion 18 exposed on the upper surface 11 of the housing portion 10 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 18a of the light-transmitting section 18. 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, when at least a portion of the upper surface 18a of the light-transmitting portion 18 is an uneven surface, the uneven surface can suppress total reflection on the upper surface 18a, thereby further improving the proportion of light that is radiated to the outside out of the light that enters the light-transmitting portion 18. Also, for example, the outer surface of the light transmitting portion 18 other than the upper surface 18a may be uneven. For example, if the lower surface of the light transmitting section 18 is an uneven surface, the light scattered in various directions by the uneven surface enters the inside of the light transmitting section 18, and the light can be made to reach the upper surface 18a of the light transmitting section 18 evenly. In this case, it is preferable that the light emitting section 91 is disposed near the region where the uneven surface is formed on the lower surface of the light transmitting section 18. Furthermore, for example, when the side peripheral surface of the light transmitting portion 18 is an uneven surface, the light that reaches the side peripheral surface of the light transmitting portion 18 can be scattered in various directions by the uneven surface, and the light can be easily reflected inside the light transmitting portion 18. Therefore, the proportion of light emitted from the upper surface 18a of the light transmitting portion 18 can be improved. In the present invention, the light transmitting portion 18 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.

[0046] Furthermore, for example, in the above description, an example has been described in which the liquid injection port 100 has a metal annular frame body that surrounds the stopper body 20, but, for example, the liquid injection port 100 does not have to have the metal annular frame body. This makes it possible to suppress heat generation from the liquid injection port 100 when an examination is performed using, for example, a magnetic resonance imaging diagnostic apparatus (not shown) on a living body in which the liquid injection port 100 is embedded. In this case, for example, the housing portion 10 directly abuts against the side peripheral surface of the plug 20 to hold the plug 20. More specifically, the plug 20 is sandwiched from above and below between the upper portion 12 and the lower portion 14 without the intervention of a metal ring-shaped frame.

[0047] 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 embedded in the housing portion; Equipped with The housing portion surrounds the plug, the housing portion has a light transmitting portion made of a light transmitting resin material and a light blocking portion made of a light blocking resin material, A liquid injection port in which, when the light emitting portion emits light, the light passes through the inside of the light transmitting portion and is emitted from at least the upper surface of the housing portion. (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) A liquid injection port according to (1) or (2), wherein the outer surfaces of both the light-transmitting portion and the light-shielding portion each constitute a portion of the outer surface of the housing portion. (4) A liquid injection port as described in (3), in which the outer surfaces of both the light-transmitting portion and the light-shielding portion each constitute a portion of the upper surface of the housing portion. (5) A liquid injection port as described in (4), wherein the outer surface of the light-shielding portion surrounds the outer surface of the light-transmitting portion on the upper surface of the housing portion. (6) A liquid injection port according to any one of (1) to (5), wherein the light transmitting portion has a planar cross-sectional area narrowing toward the upper surface of the housing portion. (7) A liquid injection port according to any one of (1) to (5), wherein the light transmitting portion has a planar cross-sectional area that increases toward the upper surface of the housing portion. (8) A liquid injection port according to any one of (1) to (7), wherein the light transmitting portion is disposed at least directly above the light emitting portion. (9) A liquid injection port according to any one of (1) to (8), wherein the light transmitting portion contains a light scattering material. (10) A liquid injection port according to any one of (1) to (9), wherein the light transmitting portion contains a fluorescent material. (11) A liquid injection port according to any one of (1) to (10), wherein the light-transmitting portion has a void therein that scatters light. (12) A liquid injection port described in any one of (1) to (11), wherein at least a portion of the upper surface of the light-transmitting portion exposed to the upper surface of the housing portion is an uneven surface that diffusely reflects light. (13) A liquid injection port according to any one of (1) to (12), further comprising a diffuse reflection structure disposed between the light-emitting portion and the light-transmitting portion for diffusely reflecting light. [Explanation of symbols]

[0048] 10 Housing section 12 Upper part 12a opening 14 Lower part 15a outer part 15b Inner part 16 Recess 18 Light transmission part 18a Top side 19 Light shielding section 19a Top side 20 Plug body 20a Inset part 20b Main part 20c small diameter section 22 Top side 24 Bottom side 26 Recess 28 Convex 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 embedded in the housing portion; Equipped with The housing portion surrounds the plug, the housing portion has a light transmitting portion made of a light transmitting resin material and a light blocking portion made of a light blocking resin material, When the light emitting portion emits light, the light passes through the inside of the light transmitting portion and is emitted from at least the upper surface of the housing portion, The light transmitting portion is a liquid injection port containing a light scattering material.

2. 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 embedded in the housing portion; Equipped with The housing portion surrounds the plug, the housing portion has a light transmitting portion made of a light transmitting resin material and a light blocking portion made of a light blocking resin material, When the light emitting portion emits light, the light passes through the inside of the light transmitting portion and is emitted from at least the upper surface of the housing portion, The light transmitting portion is a liquid injection port having a void therein that scatters light.

3. 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 embedded in the housing portion; Equipped with The housing portion surrounds the plug, the housing portion has a light transmitting portion made of a light transmitting resin material and a light blocking portion made of a light blocking resin material, When the light emitting portion emits light, the light passes through the inside of the light transmitting portion and is emitted from at least the upper surface of the housing portion, A liquid injection port, wherein at least a portion of an upper surface of the light transmitting portion exposed to the upper surface of the housing portion is an uneven surface that diffusely reflects light.

4. 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 embedded in the housing portion; Equipped with The housing portion surrounds the plug, the housing portion has a light transmitting portion made of a light transmitting resin material and a light blocking portion made of a light blocking resin material, When the light emitting portion emits light, the light passes through the inside of the light transmitting portion and is emitted from at least the upper surface of the housing portion, A liquid injection port in which a diffuse reflection structure that diffusely reflects light is disposed between the light emitting portion and the light transmitting portion.

5. 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.

6. 6. The liquid injection port according to claim 1, wherein the outer surfaces of the light transmitting portion and the light blocking portion each constitute a part of the outer surface of the housing portion.

7. 7. The liquid injection port according to claim 6, wherein the outer surfaces of the light transmitting portion and the light blocking portion each constitute a portion of the upper surface of the housing portion.

8. 8. The liquid injection port according to claim 7, wherein an outer surface of the light-blocking portion surrounds a periphery of an outer surface of the light-transmitting portion on the upper surface of the housing portion.

9. The liquid injection port according to claim 1 , wherein the light transmitting portion has a planar cross-sectional area narrowing toward an upper surface of the housing portion.

10. The liquid injection port according to claim 1 , wherein the light transmitting portion has a planar cross-sectional area that increases toward an upper surface of the housing portion.

11. The liquid injection port according to claim 1 , wherein the light transmitting portion is disposed at least in a position directly above the light emitting portion.

12. The liquid injection port according to claim 1 , wherein the light transmitting portion contains a fluorescent material.

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