Medical device connection guide and medical device for administration

Abstract

To provide a medical instrument connection guide capable of connecting a syringe having a male type connection part and a medical connection tool having a female type connection part in an excellent state. and capable of preventing damage to the male type connection part of the syringe, and to provide an administration medical instrument having the same.SOLUTION: A medical instrument connection guide 10 includes a syringe mounting part 11, and a medical connection tool holding part 12 for holding a medical connection tool 50 unmovably in an axial direction of a male type connection part 34 in a state that a female type connection part 52 of the medical connection tool 50 is opposed to the male type connection part 34 of a syringe 30 mounted on the syringe mounting part 11. The syringe mounting part 11 includes a syringe guide part 13 for guiding the syringe 30 rotatably and movably in an axial direction, and substantially matching a central axis (P) of the male type connection part 34 of the syringe 30 that is mounted and moved in an axial direction with a central axis (Q) of the female type connection part 52 of the medical connection tool 50 held by the medical connection tool holding part 12.SELECTED DRAWING: Figure 16

Description

Technical Field

[0001] The present invention relates to a medical device connection guide used when connecting a syringe having a male connection part to a medical connector having a female connection part, and a medical administration device including the same.

Background Art

[0002] When connecting a syringe having a male connection part (male lock connection part) including a hollow tip part and a collar part that wraps the tip part and has spiral ribs on the inner surface, to a medical connector having a female connection part (female lock connection part) that can accommodate the tip part of the tip part of the male connection part and has a protrusion that can engage with the spiral ribs of the collar part, a medical connector may be used. Examples of such a medical connector include a three-way stopcock. A plurality of medical devices including a syringe are connected via a three-way stopcock so that their communication states can be changed (to a communication state or a non-communication state).

[0003] As a medical device connection guide used when connecting a syringe (male connection part) and a medical connector (female connection part), the applicant of the present application has proposed a temporary fixing member of Patent Document 1 (WO2008 / 059834). The temporary fixing member 10 disclosed in Patent Document 1 is used when connecting the female connector part 7B of the second connector 5A and the male connector part 6 of the first connector 5A'. Each of the third claw parts 105c and the minimum width part 104 of the temporary fixing member 10 functions as a guide part that guides the movement of the connector 5A' when the connector 5A' moves toward the connector 5A.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When connecting a syringe (male connector) to a medical connector (female connector), if the central axes of the male connector and the female connector are misaligned, the male connector of the syringe (tip or collar) may be damaged. The inventors noticed that this problem is more likely to occur with inexperienced workers, and therefore considered a medical device connection guide that is simple in structure, reusable, and can contribute to improving the skill level of the worker. The object of the present invention is to provide a medical device connection guide used when connecting a syringe having a male connector to a medical connector having a female connector, and a medical device for administration equipped therewith, which enables a good connection between the two and prevents damage to the male connector of the syringe. [Means for solving the problem]

[0006] The following will achieve the above objectives: (1) A medical device connection guide used when connecting a syringe having a male connector having a hollow tip portion and a collar portion that encloses the tip portion and has spiral ribs on its inner surface to a medical device having a female connector portion that can house the tip portion of the male connector portion of the syringe and has a projection on its outer surface that can engage with the spiral ribs of the collar portion, The aforementioned medical device connection guide is Syringe mounting section, The medical connector is positioned with the female connector facing the male connector of the syringe placed on the syringe mounting portion, and the medical connector holder holds the medical connector so that it cannot move in the axial direction of the male connector of the syringe. The syringe mounting section includes a syringe guide section that guides the syringe so that it can rotate and move in the axial direction, and aligns the central axis of the male connector of the mounted syringe, which moves in the axial direction, substantially with the central axis of the female connector of the medical connector held in the medical connector holder section. 、 The syringe guide portion is a semi-cylindrical portion formed on the upper part of the syringe mounting portion and is open upwards. The medical device connection guide is placed on the syringe guide portion and moved axially, and by rotating the syringe which is in contact with the female connector portion of the medical connector, the spiral rib of the male connector portion and the protrusion of the female connector portion engage with each other, and the male connector portion of the syringe is attached to the female connector portion of the medical connector. The medical connector is a three-way stopcock that has a first port with a female connector, and second and third ports to which medical instruments can be connected, and the communication state of these three ports can be changed. The three-way stopcock comprises a main body member and a rotatable cock member for changing the communication state of the three ports. The medical device connection guide's medical device holding portion includes a stopcock member holding portion that, during the connection work between the syringe and the three-way stopcock, holds the stopcock member so that it cannot move in the axial direction of the male connector portion of the syringe and cannot rotate relative to the medical device connection guide and the main body member held by the medical device connection guide. A medical device connection guide.

[0007] ( 2 ) The cock member holding portion is a notch or recess that can accommodate the three-way stopcock from above, such that the upper surface of the cock member is facing downwards. 1 Medical device connection guide as described in (). ( 3 The upper end of the cock member is substantially T-shaped, with three extensions corresponding to the communication state of the three ports. The cock member holding portion has a substantially cross-shaped or substantially T-shaped recess that holds the upper end of the cock member, which has been operated so that the three ports are in a desired state of communication, so that it cannot move in the axial direction of the male connector of the syringe and cannot rotate relative to the medical device connection guide. 1 )or( 2 Medical device connection guide as described in (). ( 4 The upper end of the cock member is roughly T-shaped, with three extensions corresponding to the communication state of the three ports. The cock member holding portion is a substantially T-shaped recess that holds the upper end of the cock member, which has been operated so that the first port, which has the female connector, is not in communication with the second and third ports, so that it cannot move in the axial direction of the male connector of the syringe and cannot rotate relative to the medical device connection guide. 1 )or( 2Medical device connection guide as described in (). ( 5 ) The end of the medical device connection guide on the side where the medical device holding portion is formed has a knob portion formed on the outer surface of the side portion which is curved in a concave shape (1) to ( 4 ) Medical device connection guide as described in one of the following. ( 6 The syringe comprises an outer casing for a syringe having the male connector, and the outer casing for the syringe comprises a flange that protrudes in a flat shape from the outer circumference of the base end of the outer casing for the syringe, and has opposing short-distance portions and opposing long-distance portions. The distance between the lower surface of the medical device connection guide and the lowest part of the syringe guide portion is longer than the distance between the long distance portion of one of the flanges and the outer surface of the hollow body portion of the syringe outer cylinder as described above (1) to ( 5 ) Medical device connection guide as described in one of the following. ( 7 ) The medical device connection guide is provided with female connector movement restricting parts located on both sides of the female connector when the medical device is held in the medical device holder part, as described in (1) to ( 6 ) Medical device connection guide as described in one of the following.

[0008] Furthermore, the following items will achieve the above objectives. ( 8 A pre-filled syringe comprising a male connector having a hollow tip portion and a collar portion that encloses the tip portion and has spiral ribs on its inner surface, and a medical liquid filled inside, A medical connector comprising a female connector capable of housing the tip portion of the male connector of the syringe and having a projection on its outer surface that can engage with the spiral ribs of the collar portion, (1) to ( 7 A medical device for administration, comprising a medical device connection guide as described in any of the following. ( 9) The medical connector is a three-way stopcock having a first port with the female connection part, a second port and a third port to which a medical instrument can be connected, and capable of changing the communication state of these three ports as described above. 8 ) The medical administration device according to the above.

Advantages of the Invention

[0009] In the medical device connection guide of the present invention, the syringe placement part guides the syringe so as to be rotatable and axially movable, and aligns the central axis of the male connection part of the syringe placed and axially moved with the central axis of the female connection part of the medical connector held by the medical connector holding part. Since it has a syringe guide part for this purpose, by rotating the syringe placed on the syringe guide part and axially moved and contacting the female connection part of the medical connector, the spiral rib of the male connection part and the protrusion of the female connection part engage with each other, and the male connection part of the syringe is satisfactorily connected to the female connection part of the medical connector. For this reason, it is possible to prevent damage to the tip part and the collar part of the syringe caused by poor connection during and after connection.

[0010] Further, the medical administration device of the present invention includes the above medical device connection guide. In this medical device connection guide, the syringe placement part guides the syringe so as to be rotatable and axially movable, and aligns the central axis of the male connection part of the syringe placed and axially moved with the central axis of the female connection part of the medical connector held by the medical connector holding part. Since it has a syringe guide part for this purpose, by rotating the syringe placed on the syringe guide part and axially moved and contacting the female connection part of the medical connector, the spiral rib of the male connection part and the protrusion of the female connection part engage with each other, and the male connection part of the syringe is satisfactorily connected to the female connection part of the medical connector. For this reason, it is possible to prevent damage to the tip part and the collar part of the syringe caused by poor connection during and after connection.

Brief Description of the Drawings

[0011] [Figure 1]Figure 1 is a perspective view showing an embodiment of the medical device connection guide of the present invention. [Figure 2] Figure 2 is a front view showing an embodiment of the medical device connection guide of the present invention. [Figure 3] Figure 3 is an explanatory diagram of the AA section in Figure 2. [Figure 4] Figure 4 is an explanatory diagram of the BB cross-section in Figure 3. [Figure 5] Figure 5 is a front view showing an example of a syringe connected using the medical device connection guide of the present invention. [Figure 6] Figure 6 is an explanatory diagram of the CC cross-section in Figure 5. [Figure 7] Figure 7 is an explanatory diagram of the DD cross-section in Figure 6. [Figure 8] Figure 8 is a perspective view showing an example of a medical connector (three-way stopcock) connected using the medical device connection guide of the present invention. [Figure 9] Figure 9 is a view from direction E (front view) in Figure 8, and is a diagram illustrating one of the communication states of the three-way stopcock. [Figure 10] Figure 10 corresponds to Figure 9 and is a front view illustrating one of the communication states of a three-way stopcock. [Figure 11] Figure 11 corresponds to Figure 9 and is a front view illustrating one of the communication states of a three-way stopcock. [Figure 12] Figure 12 corresponds to Figure 9 and is a front view illustrating one of the communication states of a three-way stopcock. [Figure 13] Figure 13 is an explanatory diagram of the FF cross-section in Figure 9. [Figure 14] Figure 14 is a cross-sectional diagram illustrating one of the steps involved in connecting a syringe to a medical connector (three-way stopcock) using the medical device connection guide shown in Figure 1. [Figure 15] Figure 15 is a front view illustrating the process shown in Figure 14. [Figure 16] Figure 16 is a cross-sectional diagram illustrating one of the processes that follows Figure 14. [Figure 17]Figure 17 is a cross-sectional diagram illustrating one of the processes that follows Figure 16. [Figure 18] Figure 18 is a cross-sectional diagram illustrating one of the processes that follows Figure 17. [Figure 19] Figure 19 is a front view illustrating another embodiment of the medical device connection guide of the present invention. [Figure 20] Figure 20 is a cross-sectional diagram corresponding to Figure 4, showing another embodiment of the medical device connection guide of the present invention. [Figure 21] Figure 21 is a cross-sectional diagram corresponding to Figure 4, showing another embodiment of the medical device connection guide of the present invention. [Figure 22] Figure 22 is a bottom view diagram illustrating another embodiment of the medical device connection guide of the present invention. [Figure 23] Figure 23 is a perspective view showing another embodiment of the medical device connection guide of the present invention. [Figure 24] Figure 24 is a front view showing another embodiment of the medical device connection guide of the present invention. [Figure 25] Figure 25 is an explanatory diagram of the GG cross-section in Figure 24. [Figure 26] Figure 26 is an explanatory diagram of the HH cross-section in Figure 25. [Figure 27] Figure 27 is a cross-sectional diagram illustrating one of the steps involved in connecting a syringe to a medical connector (three-way stopcock) using the medical device connection guide shown in Figure 23. [Modes for carrying out the invention]

[0012] The medical device connection guide and administration medical device of the present invention will be described using the embodiments shown in the drawings. The present invention relates to a medical device connection guide 10 used when connecting a syringe 30, which has a male connector (male lock connector) 34 having a hollow tip portion 31 and a collar portion 33 that encloses the tip portion 31 and has spiral ribs 32 on its inner surface, to a medical connector 50, which has a female connector (female lock connector) 52 that can accommodate the tip portion 31 of the male connector 34 of the syringe 30 and has a projection 51 on its outer surface that can engage with the spiral ribs 32 of the collar portion 33. The medical device connection guide 10 comprises a syringe mounting portion 11 and a medical connector holding portion 12 that holds the medical connector 50 so that it cannot move in the axial direction of the male connector 34 of the syringe 30, with the female connector 52 of the medical connector 50 facing the male connector 34 of the syringe 30 which is mounted on the syringe mounting portion 11. The syringe mounting section 11 guides the syringe 30 so that it can rotate and move in the axial direction, and includes a syringe guide section 13 to substantially align the central axis (P) of the male connector 34 of the mounted and axially moving syringe 30 with the central axis (Q) of the female connector 52 of the medical connector 50 held by the medical connector holding section 12.

[0013] The present invention provides a medical device for administration, comprising a pre-filled syringe 30 having a male connector 34 having a hollow tip portion 31 and a collar portion 33 that encloses the tip portion 31 and has spiral ribs 32 on its inner surface, and a medical liquid 35 filled inside; a medical connector 50 having a female connector 52 that can accommodate the tip of the tip portion 31 of the male connector 34 of the syringe 30 and has a projection 51 on its outer surface that can engage with the spiral ribs 32 of the collar portion 33; and the medical device connection guide 10 described above. Furthermore, in the medical device for administration of the present invention, it is preferable that the medical connector 50 is a three-way stopcock 50 having a first port 56 having a female connector 52, a second port 57 and a third port 58 to which a medical device can be connected, and the communication state of these three ports 56, 57, and 58 can be changed.

[0014] Here, first, the syringe used in this embodiment will be described using the embodiment shown in the drawings. The syringe 30 of this embodiment is a pre-filled syringe 30 that has a hollow tip portion 31 and a male connector portion (male lock connector portion) 34 having a collar portion 33 that encloses the tip portion and has spiral ribs 32 on its inner surface, and a medical liquid 35 filled inside.

[0015] Specifically, as shown in Figures 5 to 7, the syringe 30 comprises a syringe outer cylinder 36 (hereinafter also simply referred to as the outer cylinder 36), a gasket 37 housed inside the outer cylinder 36 and capable of sliding in a liquid-tight state, a medical liquid 35 filled inside the outer cylinder 36, and a plunger 38 attached to the base end of the gasket 37. In its pre-use state, the syringe 30 is fitted with a cap 39 that seals the tip of the outer cylinder 36 (male connector 34), as shown in Figure 5. Figures 6 and 7 show the syringe with the cap 39 removed.

[0016] The outer cylinder 36 comprises a hollow body portion 40, a male connector portion 34 formed at its tip, and a flange 41. The hollow body portion 40 is substantially cylindrical and has a liquid storage space inside.

[0017] The male connector 34 of the syringe 30 protrudes towards the tip from the shoulder portion of the hollow body portion 40 of the outer cylinder 36. As shown in Figures 6 and 7, the male connector 34 has a hollow tip portion 31 and a collar portion 33 that encloses the tip portion 31. The tip portion 31 communicates with the hollow body portion 40, and the inside of the hollow body portion 40 (liquid storage space) communicates with the outside. The outer surface of the tip portion 31 has a tapered shape that narrows towards the tip. A spiral rib 32 is formed on the inner surface of the collar portion 33. The tip of the tip portion 31 protrudes slightly from the collar portion 33. The spiral rib 32 is formed to extend along the axial direction of the male connector 34. The spiral rib 32 can engage (screw) with the protruding portion 51 of the female connector 50, which will be described later.

[0018] The syringe 30 is provided with a flange 41 that protrudes in a flat shape from the outer circumference of the base end of the outer cylinder 36. More specifically, the outer cylinder 36 of the syringe is provided with a flange 41 that protrudes in a flat shape from the outer circumference of the base end of the outer cylinder 36 and has opposing short-distance sections 42, 42 and opposing long-distance sections 43, 43. The long-distance sections 43, 43 also function as two opposing gripping sections. As shown in Figure 7, multiple ribs are formed on the tip surface side of the long-distance sections 43, 43, improving the operability of the syringe 30.

[0019] The outer cylinder 36 of the syringe 30 is a cylindrical body formed from a transparent or translucent material, and, if necessary, from a material with low oxygen permeability and water vapor permeability. Examples of materials for forming the outer cylinder 36 include various resins such as polypropylene, polyethylene, polystyrene, polyamide, polycarbonate, polyvinyl chloride, poly-(4-methylpentene-1), acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyester such as polyethylene terephthalate, and cyclic polyolefins. Among these, resins such as polypropylene and cyclic polyolefins are preferred because they are easy to mold and have heat resistance.

[0020] A gasket 37 is housed inside the outer cylinder 36. As shown in Figures 6 and 7, the gasket 37 comprises a main body extending with substantially the same outer diameter and a plurality (in this case, two) of annular ribs provided on this main body, which move while in liquid-tight contact with the inner surface of the main body of the outer cylinder. As the material for forming the gasket 37, it is preferable to use an elastic rubber (e.g., butyl rubber, latex rubber, silicone rubber, styrene-butadiene rubber, isoprene rubber, etc.), a thermoplastic elastomer (e.g., styrene-based elastomers such as SBS elastomer, SEBS elastomer, SEPS elastomer, etc., olefin-based elastomers such as ethylene-α-olefin copolymer elastomer, etc.).

[0021] The gasket 37 is provided with a recess extending inward from its base end, which serves as the plunger mounting portion 44. The inner surface of the plunger mounting portion 44 has a female thread, which can be screwed into the male thread formed on the outer surface of the gasket mounting portion 45 formed on the tip of the plunger 38, which will be described later.

[0022] As shown in Figures 6 and 7, the plunger 38 comprises a main body portion extending axially with a cross-shaped cross-section, a gasket mounting portion 45 provided at its tip, and a pressing portion provided at the base end of the main body portion. The outer surface of the gasket mounting portion 45 has a male threaded portion that screws into the plunger mounting portion 44 (female threaded portion) of the gasket 37. The plunger 38 is attached to the gasket 37 by screwing the plunger mounting portion 44 of the gasket 37 and the gasket mounting portion 45 of the plunger 38 together. Note that the plunger may not be attached to the gasket and may be attached to the gasket when in use. This prevents the plunger from being accidentally pressed before use.

[0023] The inside of the syringe 30 (the liquid storage space partitioned by the hollow body portion 40 of the outer cylinder 36 and the gasket 37) is filled with a medical liquid 35. Examples of medical liquids 35 used to fill the syringe 30 include distilled water for injection, saline solution, glucose aqueous solution, and other drug dissolving solutions, as well as drugs (e.g., vitamins, minerals), X-ray contrast agents, and magnetic resonance imaging (MRI) fluids (e.g., superparamagnetic fluids with paramagnetism, such as iron oxide colloid). In this embodiment, the medical liquid 35 is a MRI fluid. This fluid has a relatively high viscosity among medical liquids.

[0024] Next, the medical connector used in this embodiment will be described using the embodiment shown in the drawings. In this embodiment, a known three-way stopcock 50 as shown in Figures 8 to 13 is used as the medical connector 50. The medical connector (three-way stopcock) 50 is a three-way stopcock 50 that has a first port 56 with a female connector 52, and a second port 57 and a third port 58 to which medical instruments can be connected, and the communication state of these three ports 56, 57, and 58 can be changed. The three-way stopcock 50 is equipped with a rotatable cock member 54 for changing the communication state of the three ports 56, 57, and 58.

[0025] More specifically, the three-way stopcock 50 comprises a main body member 53 and a cock member 54. The main body member 53 has a substantially cylindrical main body portion 55 and a substantially cylindrical hollow portion inside it.

[0026] The main body member 53 has a first port 56, a second port 57, and a third port 58. The first port 56, the second port 57, and the third port 58 extend radially from the main body 55. The first port 56, the second port 57, and the third port 58 each have a substantially cylindrical shape, and flow paths are formed inside them. These flow paths each communicate with the inside (hollow portion) of the main body 55 at their base end.

[0027] As shown in Figures 9 to 12, the first port 56, the second port 57, and the third port 58 are provided at different positions on the outer circumferential surface of the main body 55. More specifically, in this embodiment, the second port 57 and the third port 58 are provided at positions opposite each other (180° apart), and the first port 56 is provided midway between the second port 57 and the third port 58, that is, at a position 90° apart from the second port 57 and the third port 58. As a result, in a front view (see Figures 9 to 12), the first port 56, the second port 57, and the third port 58 are arranged in a roughly T-shape.

[0028] As shown in Figure 13, the first port 56 is made up of multiple components, but is generally tubular in shape, has an opening 59 at its tip, and has a flow path inside that communicates with the inside (hollow part) of the main body 55. A female connector (female lock connector) 52 is formed at the tip of the first port 56. The female connector 52 can accommodate the tip of the tip portion 31 of the male connector 34 of the syringe 30. In addition, a projection 51 that can engage with the spiral rib 32 of the collar portion 33 of the syringe 30 is formed on the outer surface of the female connector 52. An elastic valve body 61 is provided at the tip of the first port 56 (female connector 52), which closes the opening 59 and has a slit 60 into which the male connector 34 (tip portion 31) of the syringe 30 can enter. When the syringe is not attached, the opening 59 is sealed in a liquid-tight state by the elastic valve body 61.

[0029] The second port 57 is generally tubular in shape, has an opening at its tip, and has a flow path inside that communicates with the inside (hollow part) of the main body 55. A medical device connection part 62 is formed at the tip of the second port 57 to which a medical device can be connected. In this embodiment, the medical device connection part 62 is a female type connection part (female lock connection part) that can accommodate the tip of the tip of the male type connection part of a medical device and has a projection on its outer surface that can engage with the spiral rib of the male type connection part.

[0030] The third port 58 is generally tubular in shape, has an opening at its tip, and has a flow path inside that communicates with the inside (hollow part) of the main body 55. A medical device connection part 63 to which a medical device can be connected is formed at the tip of the third port 58. In this embodiment, the medical device connection part 63 is a male type connection part (male lock connection part) having a hollow tip part and a rotatable collar member that encloses the tip part and has spiral ribs on its inner surface.

[0031] The cock member 54 has a substantially cylindrical cock body 64 and a plurality (in this case, three) extensions 65, 66, and 67 provided at the upper end of the cock body 64 (the left end in Figure 13). The cock body 64, except for the portion where the extensions 65, 66, and 67 are provided (the upper end), is housed within the main body 55 (hollow portion) of the main body member 53. The cock member 54 is rotatably housed within the main body member 53. A channel (not shown) is formed in the central portion of the cock body 64 (the portion housed within the main body 55 of the main body member 53) for changing the communication state of the first port 56, the second port 57, and the third port 58 (the connection state of the flow paths that the first port 56, the second port 57, and the third port 58 each have). The flow path works in cooperation with the inner wall of the main body portion 55 of the main body member 53 to change the communication state of the first port 56, the second port 57, and the third port 58 by the rotation (position) of the cock member 54 (cock body portion 64).

[0032] Furthermore, it is preferable that the three-way stopcock 50 is provided with a position-holding mechanism that holds the main body member 53 and the cock member 54 in predetermined positions (for example, a total of eight positions: four positions corresponding to the four states shown in Figures 9 to 12 later, and four positions corresponding to intermediate positions). The position-holding mechanism is composed of, for example, a plurality (in this case, eight) of recesses formed on the inner surface of the main body portion 55 of the main body member 53, which are weakly engaged with each other, and a plurality (in this case, eight) of protrusions formed on the outer surface of the cock body portion 64 of the cock member 54. By providing such a position-holding mechanism, the cock member 54 can be held in a predetermined position within a range that does not hinder the rotational operation of the cock member 54 relative to the main body member 53, and unintended rotation (change of communication state) of the cock member 54 can be prevented.

[0033] The cock member 54 has a first extension 65, a second extension 66, and a third extension 67. The first extension 65, the second extension 66, and the third extension 67 extend radially from the upper end of the cock body 64. Together with the upper end of the cock body 64 (the portion of the body member 53 that protrudes from the body 55), the first extension 65, the second extension 66, and the third extension 67 constitute the operating part of the cock member 54. By operating (rotating) this operating part from the outside, the cock member 54 can be rotated relative to the body member 53.

[0034] The first extension 65, the second extension 66, and the third extension 67 are provided at different positions on the outer circumferential surface of the cock body 64. In this embodiment, the upper end of the cock member 54 has a substantially T-shape, with three extensions 65, 66, and 67 corresponding to the communication state of the three ports 56, 57, and 58. Specifically, the second extension 66 and the third extension 67 are provided at positions opposite each other (180° apart), and the first extension 65 is provided midway between the second extension 66 and the third extension 67, that is, at a position 90° apart from the second extension 66 and the third extension 67. As a result, in a front view (see Figures 9 to 12), the upper end of the cock member 54, which has the first extension 65, the second extension 66, and the third extension 67, has a substantially T-shape. Furthermore, in this embodiment, when the state shown in Figure 12 is reached (the first port 56, the second port 57, and the third port 58 are in communication with each other), the first extension portion 65, the second extension portion 66, and the third extension portion 67 are arranged to extend in the direction in which the first port 56, the second port 57, and the third port 58 extend, respectively.

[0035] The fact that the first extension 65, the second extension 66, and the third extension 67 correspond to the communication state of the first port 56, the second port 57, and the third port 58 will be explained in more detail using the embodiments shown in Figures 9 to 12.

[0036] In the state shown in Figure 9 (where the second extension 66 faces the direction in which the third port 58 extends, and the third extension 67 faces the direction in which the second port 57 extends), the second port 57 and the third port 58 are in communication. In other words, the first port 56 is not in communication with the second port 57 and the third port 58 (the first port 56 is blocked).

[0037] In the state shown in Figure 10 (where the first extension 65 faces the direction in which the third port 58 extends, and the second extension 66 faces the direction in which the first port 56 extends), the first port 56 and the third port 58 are in communication. In other words, the second port 57 is not in communication with the first port 56 and the third port 58 (the second port 57 is blocked).

[0038] In the state shown in Figure 11 (where the first extension 65 faces the direction in which the second port 57 extends, and the third extension 67 faces the direction in which the first port 56 extends), the first port 56 and the second port 57 are in communication. In other words, the third port 58 is not in communication with the first port 56 and the second port 57 (the third port 58 is blocked).

[0039] As described above, in the state shown in Figure 12 (where the first extension 65 faces the direction in which the first port 56 extends, the second extension 66 faces the direction in which the second port 57 extends, and the third extension 67 faces the direction in which the third port 58 extends), the first port 56, the second port 57, and the third port 58 are in communication with each other.

[0040] As described above, in the three-way stopcock 50 of this embodiment, the ports 56, 57, and 58 located in the direction in which the extensions 65, 66, and 67 extend are in communication, and the communication state of the three ports 56, 57, and 58 can be recognized from the outside by the position of the cock member 54 (the three extensions 65, 66, and 67). In the three-way stopcock 50, when changing (switching) the communication state, in other words, when the cock member 54 (the first extension 65, the second extension 66, and the third extension 67) is not in the position shown in Figures 9 to 12, it is preferable that the first port 56, the second port 57, and the third port 58 are temporarily disconnected (shut off).

[0041] As shown in Figures 1 to 4, the medical device connection guide 10 of this embodiment comprises a syringe mounting portion 11 and a medical device holding portion 12. The medical device connection guide 10 of this embodiment is a resin integral molded product, with the syringe mounting portion 11 on the base end portion (left portion in Figure 2) and the medical device holding portion 12 on the tip end portion (right portion in Figure 2).

[0042] The syringe mounting section 11 guides the syringe 30 described above so that it can rotate (rotate around the central axis of the outer cylinder 36) and move (slide) in the axial direction, and includes a syringe guide section 13 to substantially align the central axis (P) of the tip section 31 of the mounted syringe 30, which moves in the axial direction, with the central axis (Q) of the female connector section 52 of the medical connector 50 held by the medical connector holding section 12, which will be described later.

[0043] Specifically, the syringe guide portion 13 has a roughly semicircular, arc-shaped surface (roughly semi-cylindrical surface) formed on the upper surface of the syringe mounting portion 11. In other words, the syringe guide portion 13 is a semi-cylindrical portion formed on the upper part of the syringe mounting portion 11 and open upwards. The syringe guide portion 13 has an arrow-shaped recess that indicates the axial direction of movement of the male connector portion 34 of the syringe 30.

[0044] The radius of curvature of the arc-shaped surface of the syringe guide portion 13 (r shown in Figure 4) is approximately the same as the radius of curvature of the outer surface of the hollow body portion 40 of the outer cylinder 36 of the syringe 30. As a result, the syringe guide portion 13 can guide the syringe 30 so that it can rotate and move in the axial direction while the central axis (P) of the male connector portion 34 is fixed (the position of the central axis (P) of the male connector portion 34 is substantially immobile). The syringe guide portion 13 (arc-shaped surface, approximately semi-cylindrical surface) may be treated to reduce sliding resistance with the outer surface of the outer cylinder 36 (hollow body portion 40) of the syringe 30. Examples of such treatments include matte finishing and application of a resin coating with low sliding resistance (application of a fluoropolymer coating such as PTFE or ETFE).

[0045] In this embodiment, the arc length in the cross-section of the arc-shaped surface of the syringe guide portion 13 (shown in Figure 4) is shorter than the semicircle length; that is, the central angle of the arc-shaped surface of the syringe guide portion 13 (θ shown in Figure 4) is less than 180°. Specifically, it is preferably 91 to 179°, and particularly preferably 135 to 179°. This improves the workability when placing the syringe 30 on the syringe mounting portion 11 (syringe guide portion 13) and when detaching the syringe 30 (including the syringe 30 after connecting to the medical connector 50) from the syringe mounting portion 11 (syringe guide portion 13).

[0046] The medical device connection guide 10's medical device holding section 12 holds the medical device (three-way stopcock) 50 so that it cannot move in the axial direction of the male connector 34 of the syringe 30, with the female connector 52 of the medical device (three-way stopcock) 50 facing the male connector 34 of the syringe 30 placed on the syringe mounting section 11.

[0047] Specifically, as shown in Figures 2 and 3, the medical device connection guide 10's medical device holding portion 12 includes a stopcock member holding portion 14 that holds the stopcock member 54 of the three-way stopcock 50 so that it cannot move in the axial direction of the male connector portion 34 of the syringe 30 and cannot rotate relative to the medical device connection guide 10. The stopcock member holding portion 14 is a recess into which the three-way stopcock 50 can be housed from above so that the upper surface of the stopcock member 54 faces downwards. Alternatively, the stopcock member holding portion 14 may be a notch into which the medical device (three-way stopcock) 50 can be housed from above so that the upper surface of the stopcock member 54 faces downwards.

[0048] Furthermore, it is preferable that the stopcock member holding portion 14 (notch or recess) of the medical connector holding portion 12 is open upward. This improves the workability when storing the three-way stopcock 50 in the stopcock member holding portion 12, and when detaching the three-way stopcock 50 (including the three-way stopcock 50 after it has been connected to the syringe 30) from the stopcock member holding portion 12.

[0049] The stopcock member holding portion 12 preferably has a substantially cross-shaped or substantially T-shaped recess that holds the stopcock member 54, which has been operated so that the three ports 56, 57, and 58 are in a desired communication state, so that it cannot move in the axial direction of the male connector portion 34 of the syringe 30 and cannot rotate relative to the medical device connection guide 10. This prevents the stopcock member 54 from rotating during the connection work and changes the communication state of the three-way stopcock 50. In other words, the three-way stopcock 50 can be maintained in a desired communication state during the connection work.

[0050] In this embodiment, the stopcock member holder 12 is a substantially T-shaped recess that holds the stopcock member 54 (as shown in Figure 9), which has been operated so that the first port 56, equipped with a female connector 52, is not in communication with the second port 57 and the third port 58, in a state where it is not movable in the axial direction of the male connector 34 of the syringe 30 and not rotatable relative to the medical device connection guide 10. This makes it possible to maintain the shut-off state of the first port 56 (the state of not being in communication with the second port 57 and the third port 58) during connection work. The stopcock member holder 12 is designed to hold the three-way stopcock 50 in a state where it is not movable in the axial direction of the male connector 34 of the syringe 30 placed on the syringe mounting section 11, with the central axis (Q) of the female connector 52 fixed.

[0051] In this embodiment, the medical device connection guide 10 has a knob portion 15 formed on the end of the medical device connection guide 10 on the side where the medical device holder portion 12 is formed, with the outer surface of the side (specifically, both outer surfaces) curved in a concave shape. Specifically, as shown in Figure 2, the outer surfaces of both sides of the medical device connection guide 10 are symmetrically curved in a concave shape so that the width (vertical dimension in Figure 2) narrows toward the tip direction (right direction in Figure 2). By using the knob portion 15 formed in this way, the connection work between the syringe 30 and the medical device (three-way stopcock) 50 using the medical device connection guide 10 becomes easier. In addition, a through hole 16 is formed at the tip of the knob portion 15 (the tip of the medical device connection guide 10). The through hole 16 can be used for storage of the medical device connection guide 10 by attaching a strap or management tag thereto. In this embodiment, both sides of the medical connector holder 12 are symmetrically curved in a concave shape; in other words, the gripping portion 15 is formed symmetrically. However, this is not the only possible configuration. One side of the medical connector holder 12 may be curved more than the other side (the gripping portion 15 does not have to be symmetrical).

[0052] The process of connecting the syringe 30 (male connector 34) to the medical connector 50 (female connector 52) using the medical device connection guide 10 will be explained with reference to Figures 14 to 18.

[0053] First, as shown in Figures 14 and 15, the three-way stopcock 50, in the state shown in Figure 9, is held in the medical connector holder 12 of the medical device connection guide 10, with the stopcock member 54 operated so that the first port 56, which has a female connector 52, is not in communication with the second port 57 and the third port 58. Specifically, the three-way stopcock 50 is placed in the stopcock member holder 14 (a roughly T-shaped recess) of the medical connector holder 12 from above, with the upper surface of the stopcock member 54 of the three-way stopcock 50 (the lower surface in Figure 14) facing downwards (downward in Figure 14). At this time, the female connector 52 faces towards the syringe mounting section 11 (to the left in Figure 14). Furthermore, the three-way stopcock 50 is held immovably in the axial direction of the female connector 52 relative to the medical device connection guide 10 by the cock member holding portion 12, with the central axis Q of the female connector 54 fixed. Specifically, in the medical device connection guide 10 of this embodiment, as shown in Figures 1 to 3, there are inclined portions 25 and 26 that gradually decrease in height from the tip side of the syringe mounting portion 11 toward the cock member holding portion 14. The inclined portions 25 and 26 face upward and have a certain width. The inclined portions 25 and 26 may be straight or curved. Then, as shown in Figure 15, when the three-way stopcock 50 is attached to the cock member holding portion 14 of the medical device connection guide 10, if the three-way stopcock 50 is to be rotated in the clockwise direction in Figure 15, the second port 57 will come into contact with the inclined portion 26, restricting the rotation of the three-way stopcock 50. Furthermore, if the three-way stopcock 50 is to be rotated in the counterclockwise direction as shown in Figure 15, the third port 58 (specifically, the collar member provided by the third port 58) will come into contact with the inclined portion 25, restricting the rotation of the three-way stopcock 50.

[0054] Then, as shown in Figure 16, the syringe 30 is placed on the syringe mounting section 11 (syringe guide section 13). The syringe 30 is placed so that the male connector 34 faces the female connector 52 of the three-way stopcock 50 held by the medical connector holder section 12. As a result, the central axis P of the male connector 34 (tip section 31) of the syringe 30 substantially coincides with the central axis Q of the female connector 52 of the three-way stopcock 50 held by the medical connector holder section 12. The syringe 30 is guided by the syringe guide section 13 so that it can rotate and move in the axial direction while the central axis P of the male connector 34 is fixed.

[0055] Then, by moving the syringe 30, which is placed on the syringe mounting section 11 (syringe guide section 13), along the syringe guide section 13 in the axial direction of the male connector section 34, the tip of the male connector section 34 (tip section 31) comes into contact with the elastic valve body 61 provided on the tip of the female connector section 52, as shown in Figure 17.

[0056] Next, the syringe 30 is moved further axially, pressing the elastic valve body 61 with the tip portion 31 and inserting the tip of the tip portion 31 into the elastic valve body 61. Then, the syringe 30 is rotated in that state. As shown in Figure 18, by rotating the syringe 30, which is placed on the syringe guide portion 13 and moved axially, and in contact with the female connector portion 52 of the medical connector (three-way stopcock) 50, the spiral rib 32 of the male connector portion 34 and the protrusion 51 of the female connector portion 52 engage, and the tip of the tip portion 31 of the syringe is retracted into the female connector portion 52, and the syringe 30 is attached to the medical connector (three-way stopcock) 50. After that, the connected syringe 30 and medical connector (three-way stopcock) 50 are removed from the medical device connection guide 10. This completes the process of connecting the syringe 30 (male connector 34) to the medical connector 50 (female connector 52).

[0057] By using the medical device connection guide 10, the process of connecting the syringe 30 (male connector 34) to the medical connector 50 (female connector 52) can be performed with the central axis P of the male connector 34 of the syringe 30 and the central axis Q of the female connector 52 of the medical connector 50 nearly aligned. This prevents damage to the male connector 34 (tip portion 31 and collar portion 33) and the female connector 52.

[0058] Furthermore, in this embodiment, an elastic valve body 61 is provided at the tip of the female connector 52. When the syringe 30 is moved axially after the tip of the male connector 34 (tip portion 31) comes into contact with the elastic valve body 61, the elastic force of the elastic valve body 61 acts as a resistive force (a force that separates the syringe 30 and the medical connector 50 from each other). Therefore, the connection work between the syringe 30 and the medical connector 50 must be performed against the resistive force of the elastic valve body 61, and the risk of damage to the male connector 34 is higher compared to the connection work with a female connector 52 that does not have an elastic valve body 61. In contrast, by using the medical device connection guide 10, damage to the male connector 34 (tip portion 31 and collar portion 33) can be prevented even when an elastic valve body 61 is provided at the tip of the female connector 52.

[0059] Furthermore, the medical device connection guide 10 has a simple structure, making it easy to use even for inexperienced workers. Also, since the medical device connection guide 10 can be easily removed from the syringe 30 and medical connector 50 after the connection work is completed, subsequent steps (such as attaching the syringe 30 to the syringe pump) can be carried out quickly. Additionally, the medical device connection guide 10 is economical because it can be reused. Moreover, as mentioned above, while the medical device connection guide 10 assists in the connection work between the syringe 30 and the medical connector 50, it also allows workers to gain experience in basic connection work, thus contributing to improving their skill level.

[0060] Furthermore, the medical device connection guide may include female connector movement restricting parts located on both sides of the female connector when the medical device is held in the medical device holder. In the medical device connection guide 10a shown in Figure 19, female connector movement restricting parts 17, 17 are provided on both sides of the female connector 52 when the medical device (three-way stopcock) 50 is held in the medical device holder 12. This makes it possible to more firmly maintain a state in which the central axis (P) of the male connector 34 of the syringe 30 and the central axis (Q) of the female connector 52 of the medical device 50 are approximately aligned. In addition, the stopcock member 54 can be held more firmly so that it cannot move in the axial direction of the male connector 34 of the syringe 30 and cannot rotate relative to the medical device connection guide 10.

[0061] Furthermore, as shown in Figure 20, the distance d between the lower surface of the medical device connection guide 10b and the lowest part of the syringe guide portion 13 (arc-shaped surface) may be longer than the distance d1 (see Figure 5) between the outer surface of the hollow main body portion 40 of the flange 41 and the long-distance portion 43 of the flange 41. This makes it possible to avoid interference between the flange 41 of the syringe 30 and the upper surface of the desk or the like when connecting the syringe 30 (male connector portion 34) and the medical connector (three-way stopcock) 50 (female connector portion 52) with the desk or the like when the medical device connection guide 10b is placed on the desk or the like.

[0062] Furthermore, the central angle θ of the arc-shaped surface of the syringe guide portion may be 180° or more. In this case, it is preferable to give the syringe guide portion flexibility to ensure ease of operation when placing or removing the syringe. Also, as shown in Figure 21, a thin-walled curved plate portion 18, 18 continuous with the arc-shaped surface of the syringe guide portion 13 may be provided on the upper part of the syringe placement portion 11, as shown in the medical device connection guide 10c. This ensures ease of operation when placing or removing the syringe 30, and the curved plate portions 18, 18 can prevent the syringe 30 from coming off during connection work.

[0063] Furthermore, a mechanism may be provided to prevent the syringe from detaching from the syringe mounting section (syringe guide section) during connection work. For example, the medical device connection guide 10d shown in Figure 22 is provided with an elastic band 19. The elastic band 19 is fixed at both ends to both sides of the syringe mounting section 11, and its elastic force biases the syringe 30 in a direction that presses it against the syringe mounting section 11 (syringe guide section 13). The elastic band 19 is preferably made of cloth (for example, a cloth elastic band) so as not to hinder the axial movement and rotation of the syringe 30. In addition, a lid member for preventing syringe detachment may be provided on the syringe mounting section of the medical device connection guide via a hinge. Such a lid member may be integrally molded with the medical device connection guide, and the hinge may be made of a thin resin section.

[0064] Furthermore, the female connector of the medical connector (three-way stopcock) does not necessarily have to be equipped with an elastic valve body. Alternatively, the female connector may have a female Luer taper conforming to ISO standards. In that case, it is preferable that the male connector also has a male Luer taper conforming to ISO standards. However, the male connector does not need to have a male Luer taper conforming to ISO standards, as long as it can be connected to the female connector in a liquid-tight manner.

[0065] Figures 23 to 27 show another embodiment of the medical device connection guide of the present invention. In the medical device connection guide 10e, the shape of the cock member holding portion 12 differs from that of the medical device connection guide 1 described above. That is, as shown in Figure 24, the cock member holding portion 14 of the medical device connection guide 10e has a substantially cross-shaped recess that holds the cock member 54, which has been operated so that the three ports 56, 57, and 58 are in a desired communication state, so that it cannot move in the axial direction of the male connector portion 34 of the syringe 30 and cannot rotate relative to the medical device connection guide 10e.

[0066] Figure 27 shows the three-way stopcock 50 in the state shown in Figure 10, held in the medical device holder 12 of the medical device connection guide 10e. Specifically, the three-way stopcock 50, operated to the state shown in Figure 10, is placed from above into the cock member holder 14 (a roughly cross-shaped recess) of the medical device holder 12, such that the upper surface (lower surface in Figure 27) of the cock member 54 of the three-way stopcock 50 faces downwards (downward in Figure 27). At this time, the female connector 52 faces towards the syringe mounting section 11 (leftward in Figure 27). The three-way stopcock 50 is held by the cock member holder 12 so as not to move in the axial direction of the female connector 52 relative to the medical device connection guide 10e, with the central axis Q of the female connector 54 fixed.

[0067] Thus, in the medical device connection guide 10e, as with the medical device connection guide 10 described above, the operation of connecting the syringe 30 (male connector 34) to the medical connector 50 (female connector 52) can be performed with the central axis P of the male connector 34 of the syringe 30 and the central axis Q of the female connector 52 of the medical connector 50 approximately aligned. As a result, the male connector 34 of the syringe 30 is properly connected to the female connector 52 of the medical connector 50, and damage to the male connector 34 (tip part 31 and collar part 33) and the female connector 52 can be prevented.

[0068] Furthermore, the medical device connection guide 10e allows the three-way stopcock 50 to be set to a desired communication state (one of the four states shown in Figures 9 to 12) and the male connector 34 of the syringe 30 to be connected to the female connector 52 of the medical connector (three-way stopcock) 50. [Explanation of Symbols]

[0069] 10, 10a, 10b, 10c, 10d, 10e Medical Device Connection Guide 11 Syringe mounting section 12 Medical connector holder 13 Syringe guide section 30 syringes 31 Chip section 32 spiral ribs 33 Color section 34 Male connector 50 Medical connectors 51 Protrusion 52 Female connector

Claims

1. A medical device connection guide used when connecting a syringe having a male connector having a hollow tip portion and a collar portion enclosing the tip portion and having spiral ribs on its inner surface to a medical device having a female connector portion capable of housing the tip portion of the male connector portion of the syringe and having a projection on its outer surface that can engage with the spiral ribs of the collar portion, The aforementioned medical device connection guide is Syringe mounting section, The medical connector is positioned with the female connector facing the male connector of the syringe placed on the syringe mounting portion, and the medical connector holder holds the medical connector so that it cannot move in the axial direction of the male connector of the syringe. The syringe mounting section includes a syringe guide section that guides the syringe so that it can rotate and move in the axial direction, and that substantially aligns the central axis of the male connector of the mounted syringe, which is moved in the axial direction, with the central axis of the female connector of the medical connector held in the medical connector holding section. The syringe guide portion is a semi-cylindrical portion formed on the upper part of the syringe mounting portion and is open upwards. The medical device connection guide is placed on the syringe guide portion and moved axially, and by rotating the syringe which is in contact with the female connector portion of the medical connector, the spiral rib of the male connector portion and the protrusion of the female connector portion engage with each other, and the male connector portion of the syringe is attached to the female connector portion of the medical connector. The medical connector is a three-way stopcock that has a first port with a female connector, a second port and a third port to which a medical device can be connected, and the communication state of these three ports can be changed. The three-way stopcock comprises a main body member and a rotatable cock member for changing the communication state of the three ports. The medical device connection guide is characterized in that the medical device holding portion of the medical device connection guide includes a cock member holding portion that, during the connection work between the syringe and the three-way stopcock, holds the cock member so that it cannot move in the axial direction of the male connector portion of the syringe and cannot rotate relative to the medical device connection guide and the main body member held by the medical device connection guide.

2. The medical device connection guide according to claim 1, wherein the cock member holding portion is a notch or recess that can accommodate the three-way stopcock from above such that the upper surface of the cock member is facing downwards.

3. The upper end of the cock member is substantially T-shaped, and each of the three extensions corresponds to the communication state of the three ports. The medical device connection guide according to claim 1 or 2, wherein the cock member holding portion is a substantially cross-shaped or substantially T-shaped recess that holds the upper end of the cock member, which has been operated so that the three ports are in a desired state of communication, so that it cannot move in the axial direction of the male connector portion of the syringe and cannot rotate relative to the medical device connection guide.

4. The upper end of the cock member is roughly T-shaped, with three extensions corresponding to the communication state of the three ports. The medical device connection guide according to claim 1 or 2, wherein the cock member holding portion is a substantially T-shaped recess that holds the upper end of the cock member, which has been operated so that the first port having the female connector portion is not in communication with the second port and the third port, so that it cannot move in the axial direction of the male connector portion of the syringe and cannot rotate relative to the medical device connection guide.

5. The medical device connection guide according to any one of claims 1 to 4, wherein a knob portion having a concave outer surface is formed at the end of the medical device connection guide on the side where the medical device holding portion is formed.

6. The syringe comprises an outer casing for a syringe having the male connector, and the outer casing for the syringe comprises a flange that protrudes in a flat shape from the outer circumference of the base end of the outer casing for the syringe, and has opposing short-distance portions and opposing long-distance portions. A medical device connection guide according to any one of claims 1 to 5, wherein the distance between the lower surface of the medical device connection guide and the lowest part of the syringe guide portion is longer than the distance between the long-distance portion of one of the flanges and the outer surface of the hollow main body portion of the syringe outer cylinder.

7. The medical device connection guide according to any one of claims 1 to 6, wherein the medical device connection guide is provided with female connector movement restricting portions located on both sides of the female connector portion when the medical device connection is held by the medical device connection holding portion.

8. A pre-filled syringe comprising a male connector having a hollow tip portion and a collar portion that encloses the tip portion and has spiral ribs on its inner surface, and a medical liquid filled inside, A medical connector comprising a female connector capable of housing the tip portion of the male connector of the syringe and having a projection on its outer surface that can engage with the spiral ribs of the collar portion, A medical device for administration, characterized by comprising a medical device connection guide according to any one of claims 1 to 7.

9. The medical connector is a three-way stopcock that includes a first port having a female connector, and second and third ports to which medical devices can be connected, and the communication state of the three ports can be changed, as described in claim 8.

Images