Medical devices

Abstract

The present invention provides a medical device that has an insertion portion that can be inserted into a living body and an indwelling body to which an attachment can be attached, and that can reduce the area of ​​the part that comes into contact with the living body surface. [Solution] The medical device according to this disclosure comprises a retaining body having an insertion portion that can be inserted into a living body and a main body that is placed on the surface of the living body while the insertion portion is inserted into the living body, and a mounting body that can be attached to the main body via the side surface of the main body, in a state adjacent to the main body that is placed on the surface of the living body and in a direction along the surface of the living body.

Description

[Technical Field]

[0001] The present disclosure relates to a medical device. [Background Art]

[0002] For example, there are medical devices that are used by being attached to the surface of a living body over a predetermined period of time, such as several hours or several days. Patent Document 1 describes a medicinal solution administering apparatus as this type of medical device. The medicinal solution administering apparatus described in Patent Document 1 comprises a pump main body and a cradle device equipped with a connection port including a cannula indwelling in the living body. The pump main body is attachable to and detachable from the cradle device. [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2023-127494 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] In the medicinal solution administering apparatus as a medical device described in Patent Document 1, the cradle device is adhered to the surface of a living body via an adhesive sheet while the cannula is inserted into the living body. The pump main body is supported on the surface of the cradle device opposite to the surface on which the adhesive sheet is provided.

[0005] If a medical device remains in contact with the surface of a living body for a long time, skin diseases such as inflammation and itching may occur. Therefore, in a medical device, it is preferable that the area that remains in contact with the living body surface for a long time is small. In this respect, the medicinal solution administering apparatus as a medical device described in Patent Document 1 still has room for improvement.

[0006] This disclosure aims to provide a medical device that has an insertion portion that can be inserted into a living body and to which an attachment can be attached, and that can reduce the area of ​​the part that comes into contact with the living body surface. [Means for solving the problem]

[0007] A medical device as a first aspect of this disclosure is (1) A retaining body comprising an insertion portion that can be inserted into a living body, and a main body portion that is placed on the surface of the living body while the insertion portion is inserted into the living body, The medical device comprises a main body that is placed on the biological surface, and a wearable body that can be attached to the main body via the side surface of the main body, adjacent to the main body in a direction along the biological surface.

[0008] A medical device as one embodiment of the present disclosure is (2) The mounting body has a recess on its side capable of accommodating the main body, The attachment is the medical device described in (1) above, which can be attached to the main body when the main body is housed in the recess.

[0009] A medical device as one embodiment of the present disclosure is (3) The insertion portion of the implant is tubular, The aforementioned mounting body is A housing that can be attached to the main body of the implantable device, The medical device according to (1) or (2) above, comprising: a reservoir held in the housing and having a compartment inside which a storage space capable of accommodating a substance supplied to the insertion portion of the implanted body is contained.

[0010] A medical device as one embodiment of the present disclosure is (4) The mounting body comprises a movable body that is movably attached to the housing, The movable body is the medical device described in (3) above, which is movable between a restrictive position that does not allow the flow of the administered substance between the containment space of the reservoir and the insertion portion of the implant, and a permissible position that allows the flow of the administered substance between the containment space of the reservoir and the insertion portion of the implant.

[0011] A medical device as one embodiment of the present disclosure is (5) The moving body is the medical device described in (4) above, comprising an operating unit that allows a user to operate the movement between the restricted position and the permitted position from outside the housing.

[0012] A medical device as one embodiment of the present disclosure is (6) The outer surface of the housing is provided with a finger-receiving recess that can be used by the user when attaching or detaching the housing from the main body of the retaining body. The operating part of the moving body is the medical device described in (5) above, which is exposed to the outside of the housing at the position of the finger-receiving recess.

[0013] A medical device as one embodiment of the present disclosure is (7) The medical device as described in (4) above, wherein the outer surface of the housing has a finger-receiving recess that can be used by the user when attaching or detaching the housing from the main body of the implantable body.

[0014] A medical device as one embodiment of the present disclosure is (8) The medical device is one of the above (1) to (7), wherein at least one of the main body portion of the implantable body and the attachment portion is provided with a locking portion that can maintain the attachment state with the other by mechanically engaging with the other or by magnetically connecting with the other. [Effects of the Invention]

[0015] According to the present disclosure, in an indwelling body that includes an insertion portion insertable into a living body and is capable of having an attachment member attached thereto, a medical device capable of reducing the area of a portion that contacts the surface of the living body can be provided. [Brief Description of the Drawings]

[0016] [Figure 1] FIG. 1 is a diagram illustrating a use state of a medical device according to an embodiment of the present disclosure. [Figure 2A] FIG. 1 is a perspective view of the medical device illustrated in FIG. 1, showing a state where an attachment member is attached to an indwelling body. [Figure 2B] FIG. 2 is a perspective view of the medical device illustrated in FIG. 1, showing a state where the attachment member is detached from the indwelling body. [Figure 3] FIG. 3 is a schematic cross-sectional view taken along line I-I in FIG. 1. [Figure 4] FIG. 4 is a diagram illustrating a state in the state shown in FIG. 3, where the attachment member is detached from the indwelling body and only the indwelling body is attached to a living body. [Figure 5A] FIG. 5 is a diagram illustrating an example of a mechanical locking portion. [Figure 5B] FIG. 6 is a diagram illustrating an example of a magnetic locking portion. [Figure 6] FIG. 7 is a detailed cross-sectional view of the medical device illustrated in FIG. 1 at the same position as FIG. 3, showing a state immediately after the attachment member is attached to a main body portion of the indwelling body. [Figure 7] FIG. 8 is a diagram illustrating a state where a moving body is moved to an allowable position from the state shown in FIG. 6. [Figure 8] FIG. 9 is a diagram illustrating a state where a reservoir and a pusher are moved from the state shown in FIG. 7 until a distal outlet of the reservoir is in liquid-tight connection with a communication hole. [Figure 9] FIG. 10 is a diagram illustrating a modification of the medical device illustrated in FIG. 1. [Figure 10] FIG. 11 is a diagram illustrating an example of an operation of switching the indwelling body and the attachment member from an attached state to a separated state for the medical device illustrated in FIG. 1. [Figure 11]Figure 1 shows a modified example of the medical device, illustrating the state immediately after the device is attached to the main body of the implantable device. [Figure 12] This figure shows the state after the moving object has been moved to the acceptable position, starting from the state shown in Figure 11. [Figure 13] This figure shows the state after moving the reservoir and plunger from the state shown in Figure 12 until the reservoir's tip outlet is liquid-tightly connected to the communication hole. [Figure 14] Figure 1 shows a modified example of the medical device, illustrating the state immediately after the device is attached to the main body of the implantable device. [Figure 15] This figure shows the state after the moving object has been moved to the acceptable position, starting from the state shown in Figure 14. [Figure 16] This figure shows the state after moving the reservoir and plunger from the state shown in Figure 15 until the reservoir's tip outlet is liquid-tightly connected to the communication hole. [Modes for carrying out the invention]

[0017] Hereinafter, embodiments of the medical device relating to this disclosure will be described with reference to the drawings. In each figure, identical components are denoted by the same reference numerals.

[0018] Figure 1 is a diagram showing the state of use of medical device 100 as one embodiment of the medical device according to this disclosure. Figure 1 shows medical device 100 attached to the patient's arm.

[0019] The medical device 100 of this embodiment is an infusion pump used to inject administered substances such as drugs, cells, or extracellular vesicles into the body of a patient or other person. As shown in Figure 1, the infusion pump as the medical device 100 of this embodiment is used while attached to a living body. However, the medical device according to this disclosure is not limited to the infusion pump as the medical device 100 of this embodiment. The medical device according to this disclosure is not particularly limited in its use as long as it is used while attached to a living body with an insertion part inserted into the living body. Therefore, the medical device according to this disclosure may be, for example, a biological information measuring device used while attached to a living body with a sensor inserted into the living body for continuous glucose monitoring (CGM). Furthermore, the location on the living body to which the medical device according to this disclosure is attached is not limited to the arm as shown in Figure 1. The medical device according to this disclosure may be attached to an appropriate location on the living body depending on its use. Hereinafter, the infusion pump as the medical device 100 will be described as an example in this embodiment.

[0020] Figures 2A and 2B are perspective views of the medical device 100. As shown in Figures 2A and 2B, the medical device 100 comprises an indwelling body 10 and a wearable body 40. The wearable body 40 is configured to be detachable from the indwelling body 10. Figures 1 and 2A show the wearable body 40 attached to the indwelling body 10. Figure 2B shows the wearable body 40 removed from the indwelling body 10.

[0021] Figure 3 is a schematic cross-sectional view at the position of line II in Figure 1. Figure 4 shows the state in which the attachment 40 has been removed from the implant 10, and only the implant 10 is attached to the living body, as shown in Figure 3. As shown in Figures 3 and 4, the implant 10 comprises an insertion portion 11 that can be inserted into the living body, and a main body portion 12 that is placed on the living body surface BS while the insertion portion 11 is inserted into the living body. The main body portion 12 holds the insertion portion 11. Details of the implant 10 in this embodiment will be described later (see Figures 6 to 8).

[0022] The attachment 40 can be attached to the main body 12 of the implantable body 10. Specifically, as shown in Figure 3, the attachment 40 can be attached to the main body 12 via the side surface 12a of the main body 12, while the main body 12 is adjacent to the main body 12, which is implanted on the biological surface BS, in a direction A (left-right direction in Figure 3) along the biological surface BS. In other words, the attachment 40 can be attached to the main body 12 while the main body 12 is adjacent to the main body 12 in a direction perpendicular to the protruding direction of the insertion portion 11 that protrudes from the main body 12. By making the attachment 40 attachable to the main body 12 of the implantable body 10 as described above, the main body 12 of the implantable body 10 does not need to support the attachment 40 from the biological surface BS side (bottom side in Figure 3). Therefore, the main body 12 of the implantable body 10 does not have a support portion to support the attachment 40 from the biological surface BS side. In this way, when the attachment 40 is not attached to the implant 10 and the implant 10 is attached to the living body (see Figure 4), the area in contact between the implant 10 and the living body surface BS can be reduced. As a result, the area in which the implant 10 remains in contact with the living body surface BS for an extended period of time is reduced. Consequently, the area in which skin diseases such as inflammation and itching may occur due to prolonged contact between the implant 10 and the living body surface BS can be reduced.

[0023] As will be described in detail later, the device 40 of this embodiment comprises a reservoir 41 that partitions an internal containment space 41a capable of accommodating the administered substance X to be administered to a living organism, and a housing 42 that holds this reservoir 41. Figure 3 schematically shows the reservoir 41. Also, Figure 3 shows only the outline of the outer edge of the housing 42. Details of the device 40 of this embodiment will be described later (see Figures 6 to 8).

[0024] However, the configuration of the attachment 40 is not limited to the configuration of this embodiment described above. The configuration of the attachment 40 is not particularly limited as long as it can be attached to the main body 12 of the implantation body 10 as described above. The attachment 40 may be, for example, a communication device capable of communicating with an external device.

[0025] Furthermore, the mounting configuration of the attachment body 40 to the main body portion 12 of the implantation body 10 is not particularly limited, as long as the position of the attachment body 40 can be fixed relative to the main body portion 12 of the implantation body 10. At least one of the main body portion 12 of the implantation body 10 and the attachment body 40 may be provided with a locking part that can maintain the attached state with the other by, for example, mechanically engaging with the other or by magnetically connecting. Figure 5A shows an example of a mechanically engaging locking part. Figure 5B shows an example of a magnetically connectable locking part.

[0026] The mounting body 40 shown in Figure 5A is equipped with a pin member 90 as a movable locking part. By inserting the pin member 90 into a recess 91 in the main body 12 of the implantation body 10, the mounting body 40 and the main body 12 of the implantation body 10 can be mounted. Conversely, by removing the pin member 90 that is inserted into the recess 91 from the recess 91, the mounting body 40 can be removed from the main body 12 of the implantation body 10. To more easily maintain the inserted state in which the pin member 90 is inserted into the recess 91, and the removed state in which the pin member 90 is removed from the recess 91, the pin member 90 may be equipped with, for example, a so-called knock-type moving mechanism. Thus, the mounting body 40 may be equipped with a pin member 90 as a locking part that can maintain the mounted state with the main body 12 of the implantation body 10 by mechanically engaging with the main body 12 of the implantation body 10. However, the configuration of the locking part is not limited to the pin member 90 shown in Figure 5A. In addition to or instead of the attachment body 40, the main body 12 of the implantation body 10 may also be equipped with a locking mechanism.

[0027] The main body 12 of the implantable device 10 shown in Figure 5B is equipped with a first magnet 92. The attachment body 40 shown in Figure 5B is equipped with a second magnet 93. The first magnet 92 and the second magnet 93 have opposite magnetic poles so that an attractive force acts between them. The first magnet 92 and the second magnet 93 may each be a permanent magnet or an electromagnet. The main body 12 of the implantable device 10 and the attachment body 40 shown in Figure 5B can be attached by the magnetic force of the first magnet 92 and the second magnet 93. In other words, the main body 12 of the implantable device 10 shown in Figure 5B is equipped with a first magnet 92 as a locking part that maintains the attached state with the attachment body 40 by being magnetically connected to it. The attachment body 40 shown in Figure 5B is equipped with a second magnet 93 as a locking part that maintains the attached state with the main body 12 of the implantable device 10 by being magnetically connected to it. Thus, the medical device 100 may be provided with a locking part that utilizes magnetic force.

[0028] Further details of the medical device 100 of this embodiment will be described below.

[0029] Figures 6 to 8 show detailed cross-sections of the medical device 100 at the same position as in Figure 3. Figures 6 to 8 also show cross-sections of the main body 12 and housing 42, but the hatching representing the cross-sections is omitted. Furthermore, Figures 6 to 8 show an example of the operation from the time the attachment 40 is attached to the main body 12 of the implantation body 10 until the administration substance X contained in the reservoir 41 of the attachment 40 is ready for administration into the body. First, the details of the implantation body 10 and the attachment 40 of this embodiment will be described. Hereinafter, for convenience of explanation, the state in which the attachment 40 is attached to the main body 12 of the implantation body 10 (see Figures 1, 2A, 3, 6 to 8) may be simply referred to as the "attached state." Also, the state in which the attachment 40 is removed from the main body 12 of the implantation body 10 (see Figures 2B and 4) may be simply referred to as the "separated state."

[0030] As shown in Figures 3, 4, and 6-8, the retaining body 10 of this embodiment includes a valve body 13 in addition to the insertion portion 11 and main body portion 12 described above.

[0031] As shown in Figures 6 to 8, the insertion portion 11 protrudes outward from the main body portion 12. The base end of the insertion portion 11 is fixed to the main body portion 12. If the surface of the main body portion 12 on which the insertion portion 11 protrudes is called the bottom surface 12b, the main body portion 12 is used by being placed on the biological surface BS such that the bottom surface 12b is in contact with the biological surface BS. The bottom surface 12b of the main body portion 12 is an adhesive surface that can be attached to the biological surface BS, for example, by being composed of an adhesive layer.

[0032] As shown in Figures 3, 4, and 6-8, the insertion portion 11 in this embodiment is tubular. In the insertion portion 11 of this embodiment, the administered substance X is supplied from the reservoir 41 of the attachment body 40 when the device is attached. As a result, the administered substance X is administered to the body through the tubular insertion portion 11 that is inserted into the body.

[0033] The constituent material of the insertion portion 11 is not particularly limited, but examples include fluororesins such as PTFE, ETFE, and PFA; olefin resins such as polyethylene and polypropylene or mixtures thereof; polyurethane, polyester, polyamide, polyether nylon resin; and a mixture of the olefin resin and ethylene-vinyl acetate copolymer.

[0034] As shown in Figures 6 to 8, the main body 12 of this embodiment has a communication channel 21 partitioned inside. When the device is attached, the storage space 41a of the reservoir 41 of the attachment body 40 and the insertion part 11 of the implantation body 10 are in communication via the communication channel 21. Therefore, the administered substance X contained in the storage space 41a of the reservoir 41 of the attachment body 40 is supplied to the insertion part 11 through the communication channel 21.

[0035] As shown in Figures 6 to 8, the communication channel 21 opens to the outside of the main body 12 through an opening formed in the side surface 12a of the main body 12. The valve body 13 closes the opening of the communication channel 21 formed in the side surface 12a of the main body 12.

[0036] The constituent materials of the main body 12 are not particularly limited, but examples include various resin materials such as polycarbonate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), polyester, and polyacetal (POM).

[0037] Furthermore, the constituent material of the valve body 13 may be various rubber materials such as natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber, urethane rubber, silicone rubber, and fluororubber. In addition, the constituent material of the valve body 13 may be various thermoplastic elastomers such as styrene-based, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, trans-polyisoprene-based, fluororubber-based, and chlorinated polyethylene-based materials.

[0038] As shown in Figures 6 to 8, the mounting body 40 of this embodiment comprises a reservoir 41, a housing 42, a plunger 43, a movable body 44, and a valve body 45.

[0039] As shown in Figures 6 to 8, the housing 42 of this embodiment can be attached to the main body 12 of the implantation body 10. Specifically, the housing 42 of this embodiment is attached to the main body 12 of the implantation body 10 with the valve body 45 in contact with the valve body 13.

[0040] The reservoir 41, the plunger 43, the movable body 44, and the valve body 45 are held in the housing 42. The housing 42 in this embodiment is divided internally into a first holding space 55 in which the reservoir 41 and the plunger 43 are held, a second holding space 56 in which the movable body 44 is held, and a communication hole 57 that connects the first holding space 55 and the second holding space 56.

[0041] In this embodiment, the outer surface of the housing 42 has a side surface 42a that faces the side surface 12a of the main body 12 when it is attached to the main body 12 of the implantation body 10. Furthermore, in this embodiment, the outer surface of the housing 42 has a bottom surface 42b that faces the biological surface BS when the attachment body 40 is attached to the living body together with the implantation body 10 (see Figures 6 to 8). In addition, the outer surface of the housing 42 in this embodiment has a top surface 42c that is opposite to the bottom surface 42b.

[0042] An opening is formed on the side surface 42a of the housing 42, which is connected to the second retaining space 56. This opening is closed by a valve body 45.

[0043] Furthermore, as shown in Figure 2B, the mounting body 40 has a recess 42a1 on its side surface 42a that can accommodate the main body portion 12 of the implantation body 10. More specifically, the housing 42 of this embodiment has a recess 42a1 on its side surface 42a that can accommodate the main body portion 12 of the implantation body 10. Then, as shown in Figures 1 and 2A, the mounting body 40 of this embodiment can be attached to the main body portion 12 when the main body portion 12 is accommodated in the recess 42a1. More specifically, the housing 42 of this embodiment can be attached to the main body portion 12 when the main body portion 12 is accommodated in the recess 42a1. In this way, the recess 42a1 of the mounting body 40 can widely cover the area around the main body portion 12 of the implantation body 10, thereby making the attachment state between the main body portion 12 of the implantation body 10 and the mounting body 40 more stable.

[0044] Note that the shape of the recess 42a1 is not limited to that of this embodiment. As shown in the modified example in Figure 9, the recess 42a1 may be shaped to cover the upper surface 12c of the main body 12 of the implantation body 10, opposite to the lower surface 12b.

[0045] The lower surface 42b of the housing 42 is not an adhesive surface that can be attached to the biological surface BS. In other words, the lower surface 42b of the housing 42 is configured not to adhere to the biological surface BS. This helps to suppress the occurrence of skin diseases such as inflammation and itching. The housing 42 may be attached to the main body 12 of the implantation body 10 such that the lower surface 42b forms a surface that is substantially flush with the lower surface 12b. This allows both the lower surface 12b of the main body 12 of the implantation body 10 and the lower surface 42b of the housing 42 of the attachment body 40 to be in contact with the biological surface BS. Therefore, the mounting position of the medical device 100 on the biological surface BS becomes more stable.

[0046] In this embodiment, the outer surface of the housing 42 has a finger-receiving recess 42c1 that can be used by the user when attaching or detaching the housing 42 from the main body 12 of the implantation device 10. More specifically, the finger-receiving recess 42c1 in this embodiment is formed on the upper surface 42c of the housing 42. Figure 10 shows an example of the operation to separate the attachment body 40 from the main body 12 of the implantation device 10. As shown in Figure 10, the user can remove the attachment body 40 from the main body 12 of the implantation device 10 by using the finger-receiving recess 42c1 to move the attachment body 40 in a direction A along the biological surface BS.

[0047] In this embodiment, the reservoir 41 has a compartmentalized compartment 41a inside which the administered substance X supplied to the insertion portion 11 of the implantation body 10 can be contained. The administered substance X contained in the compartment 41a is discharged from the reservoir 41 through the tip outlet 41b of the reservoir 41 by moving the plunger 43.

[0048] In this embodiment, the reservoir 41 and the plunger 43 are movable within the first holding space 55. Specifically, in this embodiment, the reservoir 41 and the plunger 43 are movable within the first holding space 55 between a position in which the tip outlet 41b of the reservoir 41 is not liquid-tightly connected to the communication hole 57 and a position in which it is liquid-tightly connected to the communication hole 57. Figures 6 and 7 show the state in which the tip outlet 41b of the reservoir 41 is not liquid-tightly connected to the communication hole 57. Figure 8 shows the state in which the tip outlet 41b of the reservoir 41 is liquid-tightly connected to the communication hole 57.

[0049] The movable body 44 is movably attached to the housing 42. More specifically, the movable body 44 in this embodiment is movable within the second holding space 56. The movable body 44 in this embodiment is movable between a restricted position and an permitted position when the housing 42 is mounted on the main body 12 of the implantation body 10. The restricted position is a position in which the flow of the administered substance X between the containment space 41a of the reservoir 41 and the insertion portion 11 of the implantation body 10 is not permitted. The permitted position is a position in which the flow of the administered substance X between the containment space 41a of the reservoir 41 and the insertion portion 11 of the implantation body 10 is permitted. Figure 6 shows the movable body 44 in the restricted position. Figures 7 and 8 show the movable body 44 in the permitted position.

[0050] More specifically, the movable body 44 of this embodiment comprises a main body portion 44a, a connecting pipe portion 44b protruding from the main body portion 44a toward the side surface 42a of the housing 42, and an operating portion 44c protruding from the main body portion 44a toward the upper surface 42c of the housing 42. Furthermore, the movable body 44 of this embodiment internally partitions the storage space 41a of the reservoir 41, the communication channel 21 of the main body portion 12 of the retaining body 10, and an internal channel 44d that can communicate with it. The internal channel 44d is formed across the main body portion 44a and the connecting pipe portion 44b.

[0051] When installed, the movable body 44 moves from the restricted position (see Figure 6) to the permitted position (see Figures 7 and 8), causing the connecting pipe portion 44b to pierce the valve body 45 and the valve body 13 of the retaining body 10. As a result, the tip of the connecting pipe portion 44b is inserted into the communication channel 21 of the main body portion 12 of the retaining body 10. Furthermore, as shown in Figures 7 and 8, the internal channel 44d of the movable body 44 and the communication channel 21 of the main body portion 12 of the retaining body 10 are in communication.

[0052] Furthermore, the operating unit 44c of this embodiment can be operated by the user from outside the housing 42. By operating the operating unit 44c, the movable body 44 can be moved between a restricted position (see Figure 6) and an allowable position (see Figures 7 and 8). Specifically, the upper surface 42c of the housing 42 of this embodiment has an opening connected to a second holding space 56. The operating unit 44c of the movable body 44 of this embodiment may be operable through the opening connected to the second holding space 56 formed on the upper surface 42c of the housing 42. As shown in Figures 6 to 8, a lid 58 that can open and close the opening connected to the second holding space 56 may be attached to the upper surface 42c of the housing 42 of this embodiment. The lid 58 may be rotatably attached to the housing 42 by, for example, a hinge 59.

[0053] As described above, the operating section 44c of this embodiment can be operated from an opening connected to the second holding space 56 formed on the upper surface 42c of the housing 42, but the configuration is not limited to this. The operating section 44c may be exposed to the outside of the housing 42, for example, at the position of the finger receiving recess 42c1. Details of this configuration will be described later (see Figures 14 to 16).

[0054] The constituent materials of the reservoir 41, housing 42, plunger 43, and moving body 44 are not particularly limited, but examples include various resin materials such as polycarbonate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), polyester, and polyacetal (POM).

[0055] Furthermore, the constituent materials of the valve body 45 may be, for example, the same constituent materials as those of the valve body 13 described above.

[0056] Next, with reference to Figures 6 to 8, an example of the operation in the medical device 100, from the time the attachment 40 is attached to the main body 12 of the implantation device 10, to the time when the administration substance X contained in the reservoir 41 of the attachment 40 is ready for administration into the body, will be described.

[0057] Figure 6 shows the state immediately after the attachment body 40 is attached to the main body 12 of the implantation body 10. However, in Figure 6, the tip outlet 41b of the reservoir 41 is not liquid-tightly connected to the communication hole 57. Also, Figure 6 shows the state in which the movable body 44 is in the restricted position. In the state shown in Figure 6, the administered substance X from the reservoir 41 of the attachment body 40 cannot be supplied to the insertion part 11 of the implantation body 10.

[0058] Figure 7 shows the state in which the movable body 44 has been moved to the acceptable position from the state shown in Figure 6. However, even in Figure 7, the tip outlet 41b of the reservoir 41 is not liquid-tightly connected to the communication hole 57. In the state shown in Figure 7, the connecting pipe portion 44b of the movable body 44 penetrates both valve bodies 13 and 45, and the communication passage 21 of the main body portion 12 of the retaining body 10 and the internal passage 44d of the movable body 44 are in liquid-tight communication.

[0059] Figure 8 shows the state after moving the reservoir 41 and plunger 43 from the state shown in Figure 7 until the tip outlet 41b of the reservoir 41 is liquid-tightly connected to the communication hole 57. In the state shown in Figure 8, by moving the plunger 43 relative to the reservoir 41, the administered substance X contained in the containment space 41a can be supplied to the communication channel 21 of the implantation body 10 through the internal channel 44d of the mobile body 44. This allows the administered substance X contained in the containment space 41a to be administered into the body through the tubular insertion part 11 of the implantation body 10. The attachment body 40 may also include, for example, a temperature control unit capable of controlling the temperature of the administered substance X contained in the reservoir 41. The temperature control unit may include, for example, a heating unit capable of warming the administered substance X, such as a heater.

[0060] Next, with reference to Figures 11 to 13, a modified example of the medical device 100 described above, the medical device 200, will be explained. Compared to the medical device 100 described above, the medical device 200 shown in Figures 11 to 13 differs in the valve body 213 of the implantable body 10 and the support configuration of this valve body 213. Furthermore, the medical device 200 shown in Figures 11 to 13 differs from the medical device 100 described above in that the attachment body 40 has a membrane body 245 instead of a valve body 45 (see Figure 6, etc.). Here, only the above differences of the medical device 200 will be explained, and the explanation of the configuration common to the medical device 100 will be omitted.

[0061] As shown in Figures 11 to 13, the retaining body 10 comprises an insertion portion 11, a main body portion 12, a valve body 213, and an elastic body 214. The main body portion 12 includes a support plate portion 22 that spans within the communication passage 21. The communication passage 21 opens to the outside of the main body portion 12 through an opening formed in the side surface 12a of the main body portion 12. The valve body 213 closes the opening of the communication passage 21 formed in the side surface 12a of the main body portion 12.

[0062] The valve body 213 shown in Figures 11 to 13 is elastically supported on the support plate portion 22 via an elastic body 214, such as a coil spring. In other words, the valve body 213 can move from a position that closes the opening of the communication passage 21 formed on the side surface 12a of the main body portion 12 (see Figure 11) to a position that does not close the opening of the communication passage 21 formed on the side surface 12a of the main body portion 12 (see Figures 12 and 13) by elastically deforming the elastic body 214.

[0063] In other words, while the valve body 13 of the indwelling body 10 of the medical device 100 (see Figures 6 to 8) is punctured by the connecting tube portion 44b of the movable body 44 of the attachment body 40, the valve body 213 of the indwelling body 10 of the medical device 200 shown in Figures 11 to 13 is configured to move when pressed by the connecting tube portion 44b of the movable body 44 of the attachment body 40. In this way, the valve body 213 is not punctured by the connecting tube portion 44b. Therefore, for example, each time the attachment body 40 is replaced, the connecting tube portion 44b is not repeatedly inserted into and removed from the valve body 213. This suppresses damage to the valve body 213.

[0064] As shown in Figures 11 to 13, it is preferable that the valve body 213 is provided with a receiving recess 213a that receives the tip of the connecting pipe portion 44b of the movable body 44. This stabilizes the direction of movement of the valve body 213, which moves when pressed by the movable body 44.

[0065] Furthermore, the mounting body 40 shown in Figures 11 to 13 comprises a reservoir 41, a housing 42, a plunger 43, a movable body 44, and a membrane 245. The membrane 245 is ruptured by the connecting pipe portion 44b when the movable body 44 moves from a restricted position (see Figure 11) to an allowable position (see Figures 12 and 13). If the mounting body 40 is disposable, the membrane 245 may be used in place of the valve body 45 (see Figures 6 to 8) which is repeatedly inserted and removed by the connecting pipe portion 44b of the movable body 44.

[0066] Next, with reference to Figures 11 to 13, an example of the operation in the medical device 200, from the time the attachment 40 is attached to the main body 12 of the implantation device 10, to the time when the administration substance X contained in the reservoir 41 of the attachment 40 is ready for administration into the body, will be described.

[0067] Figure 11 shows the attachment 40 attached to the main body 12 of the implantation device 10. However, in Figure 11, the tip outlet 41b of the reservoir 41 is not liquid-tightly connected to the communication hole 57. Also, Figure 11 shows the movable body 44 in the restricted position. In the state shown in Figure 11, the administered substance X from the reservoir 41 of the attachment 40 cannot be supplied to the insertion part 11 of the implantation device 10.

[0068] Figure 12 shows the state after the movable body 44 has been moved to the acceptable position from the state shown in Figure 11. However, even in Figure 12, the tip outlet 41b of the reservoir 41 is not liquid-tightly connected to the communication hole 57. In the state shown in Figure 12, the connecting pipe portion 44b of the movable body 44 penetrates the membrane 245 and moves the valve body 213, so that the communication passage 21 of the main body portion 12 of the retaining body 10 and the internal passage 44d of the movable body 44 are in liquid-tight communication.

[0069] Figure 13 shows the state after moving the reservoir 41 and plunger 43 from the state shown in Figure 12 until the tip outlet 41b of the reservoir 41 is liquid-tightly connected to the communication hole 57. In the state shown in Figure 13, by moving the plunger 43 relative to the reservoir 41, the administration substance X contained in the containment space 41a can be supplied to the communication channel 21 of the implantation body 10 through the internal channel 44d of the mobile body 44. This allows the administration substance X contained in the containment space 41a to be administered into the body through the tubular insertion part 11 of the implantation body 10.

[0070] Referring to Figures 14 to 16, a medical device 300, as another modified example of the medical device 100 described above, will be explained. The medical device 300 shown in Figures 14 to 16 differs from the medical device 200 described above in that the operating part 344c of the mobile body 44 is exposed to the outside through the finger receiving recess 42c1. Here, only the above-mentioned difference of the medical device 300 will be explained, and the explanation of the configuration common to the medical device 100 (see Figures 1 to 10) or the medical device 200 (see Figures 11 to 13) will be omitted.

[0071] The operating section 344c of the movable body 44, shown in Figures 14 to 16, is exposed to the outside of the housing 42 at the position of the finger-receiving recess 42c1 formed on the upper surface 42c of the housing 42. Therefore, the user can move the movable body 44 between the restricted position (see Figure 11) and the permitted position (see Figures 12 and 13) by operating the operating section 344c through the finger-receiving recess 42c1.

[0072] Next, with reference to Figures 14 to 16, an example of the operation in the medical device 300, from the time the attachment 40 is attached to the main body 12 of the implantation device 10, to the time when the administration substance X contained in the reservoir 41 of the attachment 40 is ready for administration into the body, will be described.

[0073] Figure 14 shows the state in which the attachment 40 is attached to the main body 12 of the implantation device 10. However, in Figure 14, the tip outlet 41b of the reservoir 41 is not liquid-tightly connected to the communication hole 57. Also, Figure 14 shows the state in which the movable body 44 is in the restricted position. In the state shown in Figure 14, the administered substance X from the reservoir 41 of the attachment 40 cannot be supplied to the insertion part 11 of the implantation device 10.

[0074] Figure 15 shows the state in which the movable body 44 has been moved to an acceptable position from the state shown in Figure 14. However, even in Figure 15, the tip outlet 41b of the reservoir 41 is not liquid-tightly connected to the communication hole 57. In the state shown in Figure 15, the connecting pipe portion 44b of the movable body 44 penetrates the membrane 245 and moves the valve body 213, so that the communication passage 21 of the main body portion 12 of the retaining body 10 and the internal passage 44d of the movable body 44 are in liquid-tight communication.

[0075] Figure 16 shows the state after moving the reservoir 41 and plunger 43 from the state shown in Figure 15 until the tip outlet 41b of the reservoir 41 is liquid-tightly connected to the communication hole 57. In the state shown in Figure 16, by moving the plunger 43 relative to the reservoir 41, the administered substance X contained in the containment space 41a can be supplied to the communication channel 21 of the implantation body 10 through the internal channel 44d of the mobile body 44. This allows the administered substance X contained in the containment space 41a to be administered into the body through the tubular insertion portion 11 of the implantation body 10.

[0076] The medical devices relating to this disclosure are not limited to the specific configurations shown in the embodiments and modifications described above, and various modifications, changes, and combinations are possible as long as they do not depart from the scope of the claims. For example, in the medical device 100 described above, it is also possible to change the configuration so that the operating part 44c of the movable body 44 is exposed to the outside from the finger receiving recess 42c1, as in the medical device 300 described above. [Industrial applicability]

[0077] This disclosure relates to medical devices. [Explanation of Symbols]

[0078] 10: Indwelling 11: Insertion part 12: Main body 12a: Side 12b: Bottom surface 12c:Top surface 13, 213: Valve body 21: Connecting channel 22: Support plate part 40: Wearable body 41: Reservoir 41a: Containment space 41b:Tip outlet 42: Housing 42a: Side 42a1: Recess 42b: Bottom surface 42c:Top surface 42c1: Finger rest recess 43: Pusher 44: Mobile 44a: Main body 44b: Connecting pipe section 44c, 344c: Operation section 44d: Internal channel 45: Valve body 55: 1st holding space 56:Second holding space 57:Communication hole 58: Lid 59: Hinge section 90: Pin component 91: Recess 92: First Magnet 93: Second Magnet 100, 200, 300: Medical devices 213a: Receiving recess 214: Elastic body 245: Membrane body A: Direction along the surface of the living organism BS: Biological surface X: administered substance

Claims

1. A retaining body comprising an insertion portion that can be inserted into a living body, and a main body portion that is placed on the surface of the living body while the insertion portion is inserted into the living body, A medical device comprising a main body portion that is placed on the biological surface, and a wearable body that can be attached to the main body portion via the side surface of the main body portion, adjacent to the main body portion in a direction along the biological surface.

2. The mounting body has a recess on its side capable of accommodating the main body, The medical device according to claim 1, wherein the attachment can be attached to the main body while the main body is housed in the recess.

3. The insertion portion of the implant is tubular, The aforementioned mounting body is A housing that can be attached to the main body of the implantable device, The medical device according to claim 1 or 2, comprising: a reservoir held in the housing and having a compartment inside which a storage space capable of accommodating a substance supplied to the insertion portion of the implanted body is contained.

4. The mounting body includes a movable body that is movably attached to the housing, The medical device according to claim 3, wherein the movable body is movable between a restrictive position that does not allow the flow of the administered substance between the containment space of the reservoir and the insertion portion of the implant, and an allowable position that allows the flow of the administered substance between the containment space of the reservoir and the insertion portion of the implant.

5. The medical device according to claim 4, wherein the movable body is equipped with an operating unit that allows a user to operate its movement between the restricted position and the permitted position from outside the housing.

6. The outer surface of the housing is provided with a finger-receiving recess that can be used by the user when attaching or detaching the housing from the main body of the retaining body. The medical device according to claim 5, wherein the operating part of the moving body is exposed to the outside of the housing at the position of the finger-receiving recess.

7. The medical device according to claim 4, wherein the outer surface of the housing has a finger-receiving recess that can be used by the user when attaching or detaching the housing from the main body of the implantable body.

8. The medical device according to claim 1 or 2, wherein at least one of the main body portion of the implantable body and the attachment portion is provided with a locking portion that can maintain the attachment state with the other by mechanically engaging with the other or by magnetically connecting with the other.

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