JP6318691B2 - Medical plug - Google Patents

Description

  The present invention relates to a medical stopper, and in particular, is attached to a mouth portion of a medical container, seals the inside of the medical container with respect to the outside, and inserts a nozzle from the outside to thereby insert the inside of the medical container and the nozzle. It is related with the medical stopper which enables communication.

  In the medical field, a drug that is chemically unstable and loses its potency rapidly when left in solution is a vial whose mouth is sealed in a sealed body that can be pierced by a needle having a hollow tube. In a medical container such as a powder, granule, or lyophilized preparation.

  These drugs are dissolved in a solution such as water for injection, physiological saline, or glucose injection injected into the medical container through the hollow tube of the needle after the sealing body has been pierced during use. A drug is prepared. The prepared liquid medicine is taken out through the hollow pipe line of the needle part.

  In addition, a drug that is stable in a solution state is stored as a drug solution in a medical container sealed at the mouth of the sealed body, and is taken out through the hollow tube of the needle section after the sealed body is pierced during use. It is.

  In order to make it easy to prepare such liquid drugs or take out drug solutions, a sealing body for sealing the mouth of a medical container and a position above the sealing body and can be pushed and moved toward the sealing body Various types of medical plugs having a needle portion provided on the head have been developed.

  As literatures that disclose this type of medical plug, JP 2000-185085 A (Patent Document 1), JP 2000-237278 A (Patent Document 2), and JP 2003-511212 A (Patents). Reference 3).

  The medical stopper disclosed in Patent Document 1 is a sealed body for sealing the mouth of a medical container, and a bottomed cylindrical shape that is provided so as to cover the sealed body and holds the sealed body in the medical container And a bottomed cylindrical piercing means having a needle part provided so as to cover the holding part and located above the blockade.

  The sealing body includes a concave portion that receives the needle portion in the attached state, and a piercing region that is to be pierced by the needle portion into the bottom surface portion of the concave portion, and the holding portion has a through hole that accepts the needle portion in the attached state. And a side wall portion standing on the periphery of the top plate portion. The piercing means has a ceiling part having a needle part provided so as to protrude toward the sealing body, and a peripheral wall provided so as to be slidable along the outer peripheral surface of the side wall part. Part. In the attached state, the peripheral wall portion of the piercing means is held on the side wall portion of the holding portion so that the needle portion is located in the recess.

  In such a configuration, by pushing the piercing means toward the blocking body, the needle portion that has moved along with the movement of the piercing means pierces the blocking body. Thereby, a hollow pipe line and the inside of a medical container communicate. In this state, a nozzle such as an intravenous injection tube is connected to the proximal end portion of the needle portion, and the medical solution in the medical container is taken out by inverting the medical container.

  The medical stopper disclosed in Patent Document 2 is a sealing body for sealing the mouth of a medical container, a cylindrical portion provided on the sealing body, and accommodated in the cylindrical portion, and directed toward the sealing body. A bottomed cylindrical holding portion that has a needle portion that can be pushed and moved, and an opening that exposes the cylindrical portion, is provided so as to cover the sealing body, and holds the sealing body in the medical container With.

  In such a configuration, a nozzle such as an intravenous injection tube is connected to the proximal end portion of the needle portion, and when the nozzle is pushed in, the needle portion moves to pierce the sealed body. As a result, the nozzle and the inside of the medical container communicate with each other through the hollow conduit. The medical solution in the medical container is taken out by inverting the medical container in this state.

  The medical stopper disclosed in Patent Document 3 is provided with a sealing body for sealing a mouth portion of a medical container, a base portion provided so as to cover the sealing body, and a pushable toward the sealing body. And a needle portion having a hollow pipe line. The sealing body has a piercing region that is pierced by the needle portion. The base portion includes a top plate portion having an opening so as to expose the piercing region, and has a bottomed cylindrical holding portion for holding the sealing body at the mouth portion of the medical container, and the sealing body is positioned A cylindrical outer cylinder portion standing from the peripheral edge of the opening toward the side opposite to the side, and an inner cylinder portion (cylindrical body) provided so as to be positioned inside the outer cylinder portion. The needle part is accommodated in the inner cylinder part.

  In such a configuration, a nozzle provided on the syringe is connected to the proximal end portion of the needle portion, and the needle portion is pushed toward the sealing body, whereby the needle portion pierces the sealing body. As a result, the nozzle and the inside of the medical container communicate with each other through the hollow conduit. The solution in the syringe is injected into the medical container, and the drug contained in the medical container is dissolved to prepare a liquid drug. By pulling the plunger of the syringe, the prepared liquid medicine is taken out through the hollow conduit of the needle part.

JP 2000-185085 A JP 2000-237278 A Special table 2003-511212 gazette

  In the medical stopper disclosed in Patent Document 1 to Patent Document 3, the nozzle and the needle portion are connected by screwing the tip portion of the nozzle with the locking portion provided at the proximal end portion of the needle portion. ing. With such a connection, it is not possible to sufficiently maintain the sealing property between the nozzle and the needle portion. For this reason, when taking out liquid agents, such as a chemical | medical solution accommodated in the medical container and the liquid chemical | medical agent prepared in the medical container, we are anxious about a liquid agent leaking outside from a connection part.

  In addition, if the connection between the nozzle and the needle part is released and the nozzle is removed from the medical stopper after the liquid medicine or liquid medicine is taken out, the hollow pipe line of the needle part communicates with the outside of the medical container. It will be in the state. For this reason, there is a concern that the liquid agent remaining in the medical container leaks outside through the hollow conduit.

  Thus, when there is no hand around the connection portion and the proximal end side of the needle portion, the leaked liquid agent may adhere to the user. Since liquid agents used for treatment may be highly toxic, it is required to prevent liquid leakage.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a medical stopper that enables communication between the inside of a medical container and the nozzle by inserting the nozzle from the outside. Another object of the present invention is to provide a medical plug that can prevent liquid leakage when transferring a liquid agent and taking out a nozzle.

The medical plug according to the present invention is attached to the mouth of the medical container, seals the inside of the medical container with respect to the outside, and inserts the nozzle from the outside to thereby connect the inside of the medical container and the nozzle. A medical plug body that allows communication, a sealing body for sealing a mouth portion of a medical container, a base portion that is provided so as to cover the sealing body, and a nozzle that can be pushed in, And a needle portion including an empty pipe line. The base portion is provided on a cylindrical portion into which the nozzle can be inserted toward the sealing body, and on one end side of the cylindrical portion located on a side opposite to the side where the sealing body is located. And a valve portion having a slit-like valve hole provided so as to open and close in accordance with insertion / extraction. When the needle part is pushed into the nozzle, the sealing body, the cylindrical part, and the valve part are pierced through the sealing body so that the nozzle communicates with the inside of the medical container through the hollow conduit. It is accommodated in the accommodation space surrounded by. In the state in which the needle portion penetrates the sealing body and the inside of the medical container and the nozzle communicate with each other through the hollow conduit, the valve portion comes into contact with the outer peripheral surface of the nozzle so that the accommodating space is externally provided. In a state where the nozzle is pulled out from the cylindrical part after the needle part has pierced the sealing body, the one end part of the cylindrical part is closed The housing space is provided so as to maintain a sealed state with respect to the outside. The said sealing body has a recessed part for accommodating the said cylindrical part in the side in which the said base part is located, and the said cylindrical part is accommodated in the said recessed part. The base portion has an outer cylindrical portion accommodated in the concave portion so as to come into contact with an inner surface of the sealing body that defines the concave portion, and the cylindrical portion is disposed inside the outer cylindrical portion. ing.

In the medical plug according to the present invention, the one end of the cylindrical portion is located closer to the sealing body than one end of the outer cylindrical portion located on the side opposite to the side where the sealing body is located. It is preferable to do.

  According to the present invention, in the medical stopper that enables communication between the inside of the medical container and the nozzle by inserting the nozzle from the outside, liquid leakage is prevented when the liquid agent is transferred and when the nozzle is taken out. It is possible to provide a medical plug that can be used.

It is the schematic of the medical stopper which concerns on embodiment of this invention. It is a schematic perspective view of the medical stopper shown in FIG. It is a schematic sectional drawing along the III-III line | wire shown in FIG. It is a figure which expands and shows the area | region enclosed by the IV line shown in FIG. It is a figure which shows the state before inserting the nozzle of a syringe into the cylindrical part shown in FIG. It is a figure which shows the state by which the nozzle of the syringe was inserted in the cylindrical part shown in FIG. It is a figure which expands and shows the area | region enclosed by the VII line shown in FIG. It is a figure which shows the state which extracted the inserted nozzle shown in FIG. 6 from the cylindrical part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

  FIG. 1 is a schematic view of a medical plug according to the present embodiment. FIG. 2 is a schematic perspective view of the medical plug shown in FIG. FIG. 3 is a schematic cross-sectional view taken along line III-III shown in FIG. FIG. 4 is an enlarged view showing a region surrounded by the IV line shown in FIG. The medical container according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the medical stopper 1 according to the present embodiment is attached to the mouth 12 (see FIG. 2) of the medical container 10. Further, the medical plug 1 seals the inside of the medical container 10 from the outside, and allows the inside of the medical container and the nozzle to communicate with each other by inserting a nozzle 72 (see FIG. 5) from the outside. Is.

  As shown in FIG. 2, the medical container 10 includes a container body 11 having a mouth portion 12. The container main body 11 has an annular open end 11a provided at the tip. As the container body 11, a glass container or a resin container can be adopted.

  As shown in FIGS. 1 to 3, the medical plug 1 includes a sealing body 20, a needle part 30, and a base part 40. The medical plug 1 further includes a ring-shaped member 60.

  The sealing body 20 is a part for sealing the mouth portion 12. The sealing body 20 is located on the distal end side, and a plug portion 21 that is press-fitted into the mouth portion 12, a flange portion 22 that is located on the proximal end side and is provided on the periphery of the plug portion 21, and a base portion 40. And a recess 23 provided on the side.

  As the material of the sealing body 20, rubber or a thermoplastic elastomer resin can be employed. Specifically, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, isoprene-isobutylene rubber, or the like can be used as the rubber. Moreover, as the thermoplastic elastomer resin, thermoplastic elastomers such as olefin, styrene, polyurethane, polyester, polyvinyl chloride, and polybutadiene can be employed.

  Needle part 30 is provided so that it can be pushed in by nozzle 72 (refer to Drawing 5) mentioned below. The needle portion 30 includes a piercing portion 31 located at the distal end, a collar portion 32 located at the proximal end, and a hollow pipe line 33 provided so as to communicate the inside of the needle portion 30 from the distal end to the proximal end. Including. As the needle part 30, a plastic needle can be employed.

  The base portion 40 is provided so as to cover the sealing body 20. The base part 40 includes a cylindrical part 41, a valve part 42, and a holding part 50. The cylindrical part 41 has a cylindrical shape. The cylindrical part 41 is provided so that a nozzle can be inserted toward the sealing body 20.

  The valve part 42 is provided on the one end 41a (see FIG. 4) side of the cylindrical part 41 located on the opposite side to the side where the sealing body 20 is located. The valve portion 42 is fixed to the inner peripheral surface of the tubular portion 41 by ultrasonic welding or the like. The valve part 42 has a slit-shaped valve hole 42 a provided so as to open and close in accordance with the insertion and removal of the nozzle 72. The valve hole 42 a is provided so as to penetrate in the thickness direction of the valve portion 42.

  As the material of the valve portion 42, rubber or thermoplastic elastomer resin can be employed. Specifically, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, isoprene-isobutylene rubber, or the like can be used as the rubber. Moreover, as the thermoplastic elastomer resin, thermoplastic elastomers such as olefin, styrene, polyurethane, polyester, polyvinyl chloride, and polybutadiene can be employed.

  The holding part 50 is a part that holds the sealed body 20. The holding portion 50 includes a top plate portion 51, a peripheral wall portion 52 erected on the periphery of the top plate portion 51, and a bottomed cylindrical outer cylinder portion 53 provided so as to be recessed from the top plate portion 51.

  The cylindrical portion 41 and the holding portion 50 are integrally formed by injection molding, and as these materials, a synthetic resin with established safety generally used for medical purposes can be adopted. Specifically, as the synthetic resin, thermoplastic resins such as polyethylene, polypropylene, and PET (Polyethylene terephthalate), and thermoplastics such as olefin, styrene, polyurethane, polyester, polyvinyl chloride, and polybutadiene. An elastomer can be employed. In particular, it is preferable to employ an olefin-based thermoplastic elastomer as the synthetic resin.

  The ring-shaped member 60 is provided so as to cover the base portion 40. The ring-shaped member 60 includes a flat plate portion 61 provided with an opening 63 provided so that the tubular portion 41 is exposed, and a side wall portion 62 erected from the periphery of the flat plate portion 61.

  As shown in FIGS. 3 and 4, when the medical plug 1 is attached to the mouth 12 of the medical container 10, the flange 22 is placed on the open end 11 a of the container body 11. Then, the plug portion 21 enters the mouth portion 12. Thereby, the inside of the medical container 10 is sealed with respect to the outside. At this time, at least a part of the concave portion 23 of the sealing body 20 is located in the mouth portion 12.

  In a state where the base portion 40 is fixed to the medical container 10 so as to cover the sealing body 20, the top plate portion 51 is located immediately above the flange portion 22. Further, the outer cylindrical portion 53 and the cylindrical portion 41 are accommodated in the concave portion 23. One end portion 41 a of the cylindrical portion 41 is provided so as to be accommodated in the outer cylindrical portion 53.

  Specifically, the cylindrical part 41 is provided so as to penetrate the bottom surface part 53a of the outer cylinder part 53, and the cylinder located on the outer surface of the outer cylinder part 53 including the bottom surface part 53a, on the side where the sealing body 20 is located. The outer peripheral surface of the other end portion 41 b of the cylindrical portion 41 and the portion of the cylindrical portion 41 that protrudes from the bottom surface portion 53 a toward the sealing body 20 abuts against the inner surface of the concave portion 23. One end portion 41 a of the cylindrical portion 41 is located closer to the sealing body 20 than the position of the upper surface 51 a of the top plate portion 51.

  Thereby, it can suppress that the height of the medical container 10 of the state which attached the medical stopper body 1 becomes high, and can store the medical container 10 easily.

  The holding part 50 has a locking part 52 a on the distal end side of the peripheral wall part 52. The locking part 52 a is provided so as to protrude inward from the inner peripheral surface of the peripheral wall part 52. The locking parts 52a are provided on the inner peripheral surface of the peripheral wall part 52 at a pitch of 90 degrees, for example.

  When attaching the base part 40 to the medical container 10, it fits so that the latching | locking part 52a may contact the lower surface of the opening edge part 11a. Thereby, the flange part 22 of the sealing body 20 is clamped between the top-plate part 51 and the opening edge part 11a, and the sealing body 20 is stably hold | maintained by the holding | maintenance part 50. FIG.

  When the needle part 30 is pushed into the nozzle, the sealing body 20, the tubular part 41, and the valve part are pierced through the sealing body 20 so that the inside of the medical container 10 and the nozzle communicate with each other through the hollow conduit 33. It is accommodated in an accommodation space 55 surrounded by 42.

  The collar portion 32 of the needle portion 30 is slidably provided on the inner peripheral surface of the tubular portion 41. An accommodating groove 24 having a substantially V-shaped cross-sectional view for accommodating the tip of the piercing portion 31 of the needle portion 30 is provided in the sealing body 20.

  The tip of the piercing part 31 of the needle part 30 is accommodated in the accommodation groove 24, and the needle part 30 is perpendicular to the sealing body 20 by the flange part 32 coming into contact with the inner peripheral surface of the cylindrical part 41. It is hold | maintained at the cylindrical part 41 so that it can pierce.

  Further, on the proximal end side of the hollow duct 33, a receiving portion 33a provided so as to be able to receive the tip of the nozzle 72 is provided.

  The ring-shaped member 60 covers the base portion 40 so that the tubular portion 41 is exposed. The flat plate portion 61 is located immediately above the top plate portion 51, and the side wall portion 62 is in contact with the peripheral wall portion 52. The ring-shaped member 60 has an engagement protrusion 62 a provided on the distal end side of the side wall portion 62. The engagement protrusions 62a are provided on the inner peripheral surface of the side wall portion 52 at a pitch of 90 degrees, for example. When the engagement protrusion 62a is hooked on the tip of the peripheral wall portion 52 of the base portion 40, the ring-shaped member 60 tightens the base portion 40 inward. Thereby, the base part 40 will be attached to the medical container 10 more firmly.

  FIG. 5 is a diagram illustrating a state before the syringe nozzle is inserted into the cylindrical portion illustrated in FIG. 1. With reference to FIG. 5, the state before inserting the nozzle of a syringe into a cylindrical part is demonstrated.

  As shown in FIG. 5, the syringe 70 includes a main body 71 having a nozzle 72 at the tip, and a plunger 73 inserted into the main body 71. Before the nozzle 72 is inserted into the tubular portion 41, the nozzle 72 is disposed above the valve portion 42. From this state, the syringe 70 is pushed forward so that the nozzle 72 is inserted into the valve hole 42 a of the valve portion 42.

  FIG. 6 is a diagram illustrating a state where a syringe nozzle is inserted into the cylindrical portion illustrated in FIG. 1. FIG. 7 is an enlarged view showing a region surrounded by the line VII shown in FIG. A state in which the nozzle of the syringe 70 is inserted into the tubular portion 41 will be described with reference to FIGS. 6 and 7.

  When the nozzle 72 is inserted into the valve hole 42a, the valve hole 42a opens. In a state where the nozzle 72 is inserted into the cylindrical portion 41, the valve portion 42 maintains a state where the accommodation space is sealed from the outside while being in contact with the outer periphery of the nozzle. When the nozzle 72 is pushed forward, the tip of the nozzle 72 reaches the receiving portion 33a of the hollow duct 33, and the nozzle 72 and the needle portion 30 are connected. By further pushing the nozzle 72 from this state, the needle part 30 is pushed down and the blocker 20 is pierced. At this time, the valve hole 42a assists the movement of the nozzle 72 so that the nozzle 72 pushes the needle portion 30 substantially vertically downward. Thereby, it is suppressed that the needle part 30 stabs diagonally with respect to the blocking body 20. FIG.

  As shown in FIGS. 6 and 7, in the state where the needle portion 30 penetrates the sealing body 20 and the inside of the medical container 10 and the nozzle 72 communicate with each other through the hollow conduit 33, the valve hole 42 a is the nozzle. By contacting the outer peripheral surface, the valve portion 42 maintains a state in which the accommodation space 55 is sealed from the outside.

  In this state, a liquid agent such as a solution housed in the main body 71 is injected into the medical container 10 and mixed with the medicine housed in the medical container 10. Thereby, a liquid medicine is prepared. Subsequently, the medical container 10 and the syringe 70 are reversed and the plunger 73 is pulled to take out the liquid medicine in the medical container 10 through the hollow conduit 33.

  In this case, the valve portion 42 contacts the outer peripheral surface of the nozzle 72 so that the accommodation space 55 is kept sealed from the outside. Even when part of the liquid medicine moves to the storage space 55, the liquid medicine is prevented from leaking out of the storage space 55.

  Next, the nozzle 72 is pulled out from the tubular portion 41. The tip of the nozzle 72 is separated from the receiving portion 33a, and the connection between the nozzle 72 and the needle portion 30 is released. In a state where the nozzle 72 is pulled out from the cylindrical portion 41, the valve portion 42 maintains a state where the accommodation space 55 is sealed from the outside while being in contact with the outer periphery of the nozzle.

  FIG. 8 is a view showing a state in which the inserted nozzle shown in FIG. 6 is pulled out from the cylindrical portion. The state where the inserted nozzle 72 shown in FIG. 6 is pulled out from the cylindrical portion 41 will be described with reference to FIG.

  As shown in FIG. 8, in a state where the nozzle 72 is pulled out from the tubular portion 41, the state where the needle portion 30 has pierced the sealing body 20 is maintained. Thereby, the state where the accommodation space 55 and the inside of the medical container 10 are communicated with each other via the hollow duct 33 is maintained.

  When the nozzle 72 is pulled out from the cylindrical portion 41, the valve hole 42a is closed. The valve part 42 maintains the state where the accommodation space 55 is sealed with respect to the outside by closing the one end part 41 a of the cylindrical part 41. As a result, even when a part of the liquid medicine remaining in the medical container 10 moves to the accommodation space 55 via the hollow conduit 33, the liquid medicine is prevented from leaking out of the accommodation space 55. Is done.

  As described above, the medical stopper 1 according to the present embodiment can prevent liquid leakage when the liquid agent in the medical container 10 is transferred and when the nozzle is taken out from the tubular portion 41.

  In the present embodiment described above, the locking part 52a provided at the tip of the peripheral wall part 52 of the base part 40 is locked to the opening end part 11a, so that the sealed body 20 is connected to the medical container 10 and the holding part 50. The case where the sealing body 20 is held by the holding portion 50 is described as an example, but the locking portion 52a may not be provided.

  In this case, the front end portion of the side wall portion 62 of the ring-shaped member 60 is caulked toward the opening end portion 11a, so that the sealing body is interposed between the holding portion 50 tightened by the ring-shaped member 60 and the medical container 10. The sealing body 20 is hold | maintained at the holding | maintenance part 50 by 20 being clamped. Further, in this case, the distal end portion of the peripheral wall portion 52 may be caulked toward the opening end portion 11a at the same time. Moreover, the sealing body 20 and the holding | maintenance part 50 may be hold | maintained at the holding | maintenance part 50 by shape | molding integrally by injection molding.

  In this Embodiment mentioned above, although the sealing body 20 illustrated and demonstrated the case where it had the recessed part 23 provided in the side in which the base part 40 is located, it does not need to have the recessed part 23. FIG. In this case, it is preferable that the flange portion 22 is provided as a disk so as to cover the upper surface of the stopper portion 21, and the top plate portion 51 of the holding portion 50 is also provided in a disk shape so as to cover the disk. It is preferable. Furthermore, in this case, it is preferable that the tubular portion 41 is provided so as to protrude from the approximate center of the top plate portion 51 toward the side opposite to the side where the sealing body 20 is located, and the side where the base portion 40 is located. It is preferable that the thin part which forms a piercing area | region is provided when the plug part 21 is dented from the opposite side.

  Although the embodiments of the present invention have been described above, the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, and includes meanings equivalent to the terms of the claims and all modifications within the scope.

  DESCRIPTION OF SYMBOLS 1 Medical plug body, 10 Medical container, 11 Container main body, 11a Open end part, 12 mouth part, 20 Sealed body, 21 Plug part, 22 Flange part, 23 Recessed part, 24 Storage groove, 30 Needle part, 31 Puncture Part, 32 collar part, 33 hollow pipe, 33a receiving part, 40 base part, 41 cylindrical part, 41a one end part, 41b other end part, 42 valve part, 42a valve hole, 50 holding part, 51 top plate part 51a Top surface, 52 Peripheral wall portion, 52a Locking portion, 53 Outer cylinder portion, 53a Bottom surface portion, 55 Storage space, 60 Ring-shaped member, 61 Flat plate portion, 62 Side wall portion, 62a Engagement protrusion, 63 Opening portion, 70 Syringe 71 Main body, 72 nozzles, 73 plungers.

Claims (2)

A medical plug that is attached to the mouth of a medical container, seals the inside of the medical container from the outside, and allows the inside of the medical container and the nozzle to communicate with each other when the nozzle is inserted from the outside. And
A sealing body for sealing the mouth of the medical container;
A base portion provided to cover the sealing body;
A needle part that is provided so as to be pushed by a nozzle and includes a hollow pipe line;
The base portion is provided on a cylindrical portion into which the nozzle can be inserted toward the sealing body and on one end side of the cylindrical portion located on the opposite side to the side where the sealing body is located. Including a valve portion having a slit-like valve hole provided to open and close according to insertion and removal,
When the needle part is pushed into the nozzle, the sealing body, the cylindrical part, and the valve part are pierced through the sealing body so that the nozzle communicates with the inside of the medical container through the hollow conduit. Is accommodated in a storage space surrounded by
In the state in which the needle portion pierces the sealing body and the inside of the medical container and the nozzle communicate with each other through the hollow conduit, the valve portion contacts the outer peripheral surface of the nozzle so that the accommodation space is externally provided. In the state where the nozzle is pulled out from the cylindrical portion after the needle portion has pierced the sealing body, the one end portion of the cylindrical portion is closed. The storage space is provided to maintain a sealed state with respect to the outside ,
The sealing body has a recess for accommodating the cylindrical portion on the side where the base portion is located,
The cylindrical portion is accommodated in the recess,
The base portion has an outer cylinder portion accommodated in the recess so as to come into contact with an inner surface of the sealing body that defines the recess,
The tubular portion is a medical plug , which is disposed inside the outer tubular portion . 2. The medical plug according to claim 1, wherein the one end of the cylindrical part is located closer to the sealing body than one end of the outer cylinder part located on the side opposite to the side where the sealing body is located .

Images