Medical connectors

Abstract

To avoid complicating the configuration of fixed valves. [Solution] The medical connector comprises a fixing valve for securing a medical device and a hemostatic valve positioned at the tip of the fixing valve.

Description

Technical Field

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[0001] The technology disclosed in this specification relates to medical connectors.

Background Art

[0002] [[ID=​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Explanatory diagram showing the appearance of the medical connector in this embodiment. [Figure 2] An explanatory diagram showing a longitudinal cross-section of the medical connector in this embodiment. [Figure 3] Diagram illustrating the configuration of the opening and closing mechanism. [Figure 4] Diagram illustrating the configuration of the opening and closing mechanism. [Figure 5] Diagram illustrating the configuration of the opening and closing mechanism. [Figure 6] Diagram illustrating the external structure of a hemostatic valve. [Figure 7] Diagram illustrating the external structure of a hemostatic valve. [Figure 8] Diagram illustrating the configuration of the holding mechanism [Figure 9] Diagram illustrating the structure of the support cylinder. [Figure 10] Diagram illustrating the configuration of a fixed valve [Figure 11] Diagram illustrating the configuration of a fixed valve [Figure 12] An explanatory diagram showing the configuration of a cylindrical body, a pressing member, and a force transmission member. [Figure 13] Diagram illustrating a modified hemostatic valve. [Modes for carrying out the invention]

[0009] (Configuration of medical connectors) Figure 1 is an explanatory diagram showing the external appearance of the medical connector 10 in this embodiment. Figure 2 is an explanatory diagram showing the longitudinal section (YZ section) of the medical connector 10 in this embodiment. In each figure, the illustration of some components may be omitted, some components that are not actually visible in the external view may be shown, and the external appearance of some components may be shown in the cross-sectional view. In the medical connector 10, the side in the positive Z-axis direction is called the tip side (distal side), and the side in the negative Z-axis direction is called the base side (proximal side). For the medical connector 10 and each of its components, the end on the tip side is called the "tip," the tip and its vicinity are called the "tip portion," the end on the base side is called the "base end," and the base end and its vicinity are called the "base end portion." The positive Z-axis direction is also called "forward," the negative Z-axis direction is also called "backward," the positive Y-axis direction is also called "upward," and the negative Y-axis direction is also called "downward." The cross-section of the medical connector 10 and each of its components means a cross-section perpendicular to the longitudinal direction. The longitudinal section of the medical connector 10 and its components refers to the section parallel to the central axis in the longitudinal direction. For the medical connector 10 and its components, the direction perpendicular to the central axis in the longitudinal direction is called the radial direction.

[0010] The medical connector 10 is a Y-connector. The medical connector 10 has a main section 11 and a branched section 12. The main section 11 has a main lumen 13 that penetrates the main section 11 along a central axis Ax parallel to the Z-axis direction. A medical device is inserted into the main lumen 13 from the proximal end. Below, an example in which a guidewire GW is used as the medical device will be described. The main lumen 13 also functions as a fluid passage. The branched section 12 branches off from near the tip of the main section 11 and extends diagonally upward towards the proximal end. The branched section 12 has a branched lumen 14 that leads to the main lumen 13. The branched lumen 14 functions as a passage through which a fluid, such as a contrast agent or saline solution, supplied from a fluid supply device (not shown) connected to the branched lumen 12 flows. The main lumen 13 is an example of a first passage, and the branched lumen 14 is an example of a second passage.

[0011] A rotator 18 is attached to the tip of the medical connector 10. A guiding catheter GC is connected to the tip side of the medical connector 10 via the rotator 18. A guide wire GW is inserted into the guiding catheter GC via the medical connector 10.

[0012] The medical connector 10 has a fixing valve 200 for fixing the guide wire GW inserted into the main lumen 13. The medical connector 10 further has an opening / closing mechanism 300 for opening and closing a hemostatic valve 320 that suppresses the outflow of blood through the main lumen 13. The opening / closing mechanism 300 including the hemostatic valve 320 is disposed on the tip side of the fixing valve 200.

[0013] (Configuration of the opening / closing mechanism 300) Figs. 3 to 5 are explanatory diagrams showing the configuration of the opening / closing mechanism 300. Figs. 3 and 4 show the opening / closing mechanism 300 in a state where the hemostatic valve 320 is closed (hereinafter referred to as "closed-state opening / closing mechanism 300c"). Fig. 5 shows the opening / closing mechanism 300 in a state where the hemostatic valve 320 is opened (hereinafter referred to as "open-state opening / closing mechanism 300o").

[0014] The opening / closing mechanism 300 includes a housing 310, a hemostatic valve 320, a penetrating member 330, an operating member 380, a force transmission member 340, and a holding mechanism 360.

[0015] The housing 310 is a tubular member in which a lumen 313 is formed. The housing 310 is formed of, for example, a resin material. The tip of the housing 310 is fixed to the base end of the housing 110. A seal member (not shown) is disposed between the housing 310 and the housing 110. The lumen 313 of the housing 310 is connected to the through hole 113 of the main body part 11. The lumen 313 of the housing 310 constitutes a part of the main lumen 13.

[0016] The housing 310 has a partition wall 314 formed substantially perpendicular to the central axis Ax. The partition wall 314 has a through hole 314A formed therethrough and constituting a part of the lumen 313. A member accommodation space 316 is formed on the proximal side of the partition wall 314 inside the housing 310. The member accommodation space 316 opens at the lower part of the housing 310.

[0017] FIGS. 6 and 7 are explanatory views showing the external configuration of the hemostatic valve 320. The hemostatic valve 320 is a valve for opening and closing the main lumen 13. The hemostatic valve 320 is formed of an elastic material such as, for example, silicon rubber. In the present embodiment, a so-called duckbill valve is used as the hemostatic valve 320. The hemostatic valve 320 has a base portion 322 and a lip portion 324 located on the distal side of the base portion 322. The base portion 322 is substantially cylindrical. The base portion 322 has a pair of ribs 328 protruding radially inward. The presence of the ribs 328 suppresses the hemostatic valve 320 from being deformed unintentionally under pressure from the distal side. The lip portion 324 has a shape in which the width in the X-axis direction narrows from the boundary with the base portion 322 toward the distal side. A slit 326 is formed at the tip of the lip portion 324.

[0018] The hemostatic valve 320 is fixed at a position on the distal side of the partition wall 314 inside the housing 310. A substantially annular boss 302 (see FIG. 2) is disposed between the hemostatic valve 320 and the partition wall 314. As shown in FIGS. 3 and 4, the hemostatic valve 320 is normally in a closed state in which the slit 326 is closed and the valve is closed. In the closed state of the hemostatic valve 320, the lumen 313 is closed by the hemostatic valve 320, and the outflow of blood from the proximal side through the lumen 313 is suppressed. As shown in FIG. 5, when the hemostatic valve 320 is pressed from the proximal side, the lip portion 324 elastically deforms and the slit 326 opens, resulting in an open state in which a through hole 327 penetrating the hemostatic valve 320 in the front-rear direction is formed. In the open state of the hemostatic valve 320, the lumen 313 is not closed at the position of the hemostatic valve 320 and is in an open state. When the pressing force from the proximal side disappears, the hemostatic valve 320 elastically deforms and returns to the closed state.

[0019] The through member 330 is a tubular member having a through hole 332 extending along the central axis Ax. The through member 330 is made of, for example, a resin material. The through member 330 is housed inside the housing 310 on the proximal end side of the hemostatic valve 320. A protrusion 335 projecting in the X-axis direction is formed on the outer circumferential surface of the through member 330. One protrusion 335 is provided on each side of the through member 330.

[0020] The through member 330 is movable along the central axis Ax while having a predetermined vertical and horizontal position relative to the housing 310. The position of the through member 330 along the central axis Ax switches between a non-pressed position P1 shown in Figures 3 and 4 and a pressed position P2 shown in Figure 5. In the non-pressed position P1, the through member 330 closes the hemostatic valve 320 without pressing it. In the pressed position P2, which is further forward than the non-pressed position P1, the tip of the through member 330 presses the hemostatic valve 320 from the base side, opening the hemostatic valve 320. When the hemostatic valve 320 is open, the through hole 327 formed in the hemostatic valve 320 and the through hole 332 in the through member 330 are connected. The through member 330 is an example of an opener. The non-pressed position P1 is an example of a first position, and the pressed position P2 is an example of a second position.

[0021] The operating member 380 is a substantially cylindrical member that extends in the vertical direction. The operating member 380 is formed of, for example, a resin material. The operating member 380 is supported by the support cylinder 350 of the holding mechanism 360, which will be described later, and is movable in the vertical direction. The lower end of the operating member 380 is exposed to the outside from the support cylinder 350. The operator applies pressure to this exposed portion.

[0022] The force transmission member 340 is a substantially rectangular parallelepiped-shaped member. The force transmission member 340 is formed of, for example, a resin material. A through hole 344 extending in the front-rear direction is formed in the force transmission member 340. A through member 330 is inserted into the through hole 344. Grooves 345 are formed on the left and right sides of the force transmission member 340, connecting the through hole 344 to the outer circumferential surface of the force transmission member 340. The grooves 345 extend diagonally from the upper base end to the lower tip end. A protrusion 335 of the through member 330 fits into the grooves 345. As a result, the through member 330 is able to move relative to the force transmission member 340 along the extending direction of the grooves 345. A protrusion 343 projecting downward is formed on the lower surface of the force transmission member 340. A protrusion 342 projecting upward is formed on the upper surface of the force transmission member 340.

[0023] The force transmission member 340 is housed in the member housing space 316 of the housing 310 in a manner that allows it to move vertically. Within the housing 310, a spring 362 is positioned above the force transmission member 340. The protrusion 342 of the force transmission member 340 is inserted into the hollow lower end of the spring 362. The upper end of the spring 362 is fixed to the top surface of the member housing space 316. The spring 362 pushes the force transmission member 340 downward.

[0024] As shown in Figures 3 and 4, when the force transmission member 340 is in the lower position P3, the protrusion 335 of the through member 330 is located in the upper base end portion of the groove 345 (hereinafter referred to as the "closed position portion 345A"). At this time, the through member 330 is in the non-pressed position P1. As shown in Figure 5, when the force transmission member 340 moves from the lower position P3 to the upper position P4, the protrusion 335 of the through member 330 moves relative to the groove 345 to the lower tip portion (hereinafter referred to as the "open position portion 345B"). Consequently, the through member 330 moves toward the tip to the pressed position P2.

[0025] Figure 8 is an explanatory diagram showing the configuration of the holding mechanism 360. The holding mechanism 360 is a so-called double-knock mechanism. The holding mechanism 360 maintains the position of the force transmission member 340 along the vertical direction while switching between the lower position P3 and the upper position P4 described above. In other words, the holding mechanism 360 maintains the position of the through member 330 along the front-rear direction while switching between the non-pressed position P1 and the pressed position P2 described above.

[0026] The holding mechanism 360 includes a support cylinder 350, a rotor 370, and a spring 362. In this embodiment, a part of the operating member 380 also constitutes a part of the holding mechanism 360.

[0027] Figure 9 is an explanatory diagram showing the configuration of the support cylinder 350. The support cylinder 350 is a substantially cylindrical member. The support cylinder 350 is formed of, for example, a resin material. The support cylinder 350 is fixed to the lower end of the housing 310. The central axis of the support cylinder 350 extends in the vertical direction. A toothed support cylinder end face cam 353 is formed on the inner circumferential surface of the support cylinder 350. The support cylinder end face cam 353 is a cam in which shallow grooves 354 and deep grooves 355 are formed alternately in the circumferential direction. In this embodiment, the support cylinder end face cam 353 is composed of four shallow grooves 354 and four deep grooves 355.

[0028] As shown in Figure 8, the upper end of the operating member 380 is inserted into the hollow portion of the support cylinder 350. A toothed operating member end face cam 382 is formed on the upper end face of the operating member 380. Four convex contacts 381 are formed on the outer circumferential surface of the upper end of the operating member 380. Each contact 381 of the operating member 380 is housed in a deep groove 355 on the inner circumferential surface of the support cylinder 350. As a result, the operating member 380 is able to move along the axial direction of the support cylinder 350 while its rotation is constrained.

[0029] The rotor 370 is a substantially disc-shaped member. The rotor 370 is formed of, for example, a resin material. Four protrusions 373 are formed on the outer circumferential surface of the rotor 370. Teeth are formed on the lower surface of each protrusion 373. The pitch of the peaks of the operating member end face cam 382 described above is shifted by approximately 1 / 2 the pitch of the peaks of the support cylinder end face cam 353. Therefore, each protrusion 373 of the rotor 370 cannot simultaneously engage with both the operating member end face cam 382 and the support cylinder end face cam 353. A recess 374 is formed on the upper surface of the rotor 370.

[0030] The spring 362 is made of a metal such as stainless steel. The spring 362 is positioned between the rotor 370 and the housing 310. One end of the spring 362 is inserted into a recess 374 of the rotor 370, and the other end of the spring 362 is fixed to the housing 310.

[0031] In the retracted rotor state, when each protrusion 373 of the rotor 370 is fitted into the deep groove 355 of the support cylinder end face cam 353, the rotor 370 is positioned in a retracted position downward, using the deep groove 355 as a guide. Therefore, in the retracted rotor state, as shown in Figures 3 and 4, the force transmission member 340 is in the lower position P3 and the through member 330 is in the non-pressed position P1 and does not press the hemostatic valve 320. As a result, the opening / closing mechanism 300 is in the closed state opening / closing mechanism 300c, with the hemostatic valve 320 closed. The retracted rotor state is maintained as long as the operating member 380 does not move.

[0032] When the rotor is retracted, if the operating member 380 moves upward, the operating member end face cam 382 contacts each of the protrusions 373 of the rotor 370, causing the rotor 370 to move in the same direction as the operating member 380. When the rotor 370 moves upward to a position where each of the protrusions 373 escapes from the deep groove 355, each of the protrusions 373 slides along the tooth profile of the operating member end face cam 382, ​​causing the rotor 370 to rotate circumferentially by half a tooth. As a result, each of the protrusions 373 and the operating member end face cam 382 become fully engaged. Subsequently, if the operating member 380 moves downward, the rotor 370 also moves in the same direction as the operating member 380. At this point, since the rotor 370 has already rotated by half a tooth, each of the protrusions 373 fits into the shallow groove 354 of the support cylinder end face cam 353 instead of the deep groove 355. In the rotor-advancing state, when each protrusion 373 is fitted into the shallow groove 354, the rotor 370 is held in a position that is moved upward compared to the rotor-retracting state. Therefore, in the rotor-advancing state, as shown in Figure 5, the force transmission member 340 is in the upper position P4 and the through member 330 is in the pressing position P2, pressing the hemostatic valve 320. As a result, the opening / closing mechanism 300 becomes the open-state opening / closing mechanism 300o, with the hemostatic valve 320 open. The rotor-advancing state is maintained as long as the operating member 380 does not move.

[0033] When the rotor is in the forward position, as the operating member 380 moves upward, the operating member end face cam 382 contacts each of the protrusions 373 of the rotor 370, causing the rotor 370 to move in the same direction as the operating member 380. When the rotor 370 moves upward to a position where each of the protrusions 373 escapes from the shallow grooves 354, each of the protrusions 373 slides along the tooth profile of the operating member end face cam 382, ​​causing the rotor 370 to rotate circumferentially by half a tooth. As a result, each of the protrusions 373 and the operating member end face cam 382 become fully engaged. Subsequently, when the operating member 380 moves downward, the rotor 370 also moves in the same direction as the operating member 380. At this point, since the rotor 370 has already rotated by half a tooth, each of the protrusions 373 fits into the deep groove 355 of the support cylinder end face cam 353 instead of the shallow groove 354. As a result, the holding mechanism 360 returns to the rotor retracted position, the force transmission member 340 moves to the lower position P3, and the through member 330 moves to the non-pressed position P1 and no longer presses against the hemostatic valve 320. Consequently, the opening and closing mechanism 300 returns to the closed state opening and closing mechanism 300c, with the hemostatic valve 320 closed.

[0034] In this manner, the holding mechanism 360 maintains the position of the force transmission member 340 while switching its position between the lower position P3 and the upper position P4 each time the operating member 380 moves upward as the operator pushes the operating member 380 upward. As a result, the position of the penetrating member 330 is maintained while switching between the non-pressed position P1 and the pressed position P2, and the state alternates between the closed state opening / closing mechanism 300c, in which the hemostatic valve 320 is closed, and the open state opening / closing mechanism 300o, in which the hemostatic valve 320 is open.

[0035] (Configuration of fixed valve 200) Figures 10 and 11 are explanatory diagrams showing the configuration of the fixed valve 200. Figure 11 shows the fixed valve 200 with the guide wire GW fixed (hereinafter referred to as "fixed valve 200f"). Figure 10 shows the fixed valve 200 with the guide wire GW released (hereinafter referred to as "released valve 200n").

[0036] The fixed valve 200 includes a housing 210, a cylindrical body 290, a pressing member 240, an operating member 280, a force transmission member 230, and a holding mechanism 260.

[0037] The housing 210 is a tubular member with a lumen 213 extending along the central axis Ax. The housing 210 is made of, for example, a resin material. As shown in Figure 2, the tip of the housing 210 is fixed to the base end of the housing 310 of the opening / closing mechanism 300. The lumen 213 of the housing 210 is connected to the lumen 313 of the housing 310. The lumen 213 of the housing 210 constitutes part of the main lumen 13.

[0038] Inside the housing 210, a retraction space 214 and a component housing space 216 are formed. The retraction space 214 is the portion where the lumen 213 is extended downwards. The component housing space 216 is connected to the lumen 213 and extends diagonally (hereinafter referred to as "first direction D1") upwards from the connection point with the lumen 213 toward the base end, opening onto the surface of the housing 210.

[0039] Figure 12 is an explanatory diagram showing the configuration of the cylindrical body 290, the pressing member 240, and the force transmission member 230. The cylindrical body 290 is a substantially cylindrical member with a through hole 291 formed along the central axis Ax. The cylindrical body 290 is made of an elastic material such as silicone rubber. As shown in Figures 10 and 11, the cylindrical body 290 is housed in the lumen 213 of the housing 210.

[0040] Approximately cylindrical stoppers 220 are attached to both ends of the cylindrical body 290. Each stopper 220 has a main body portion 221 with approximately the same diameter as the cylindrical body 290, a first small-diameter portion 223 located on the side of the main body portion 221 closer to the cylindrical body 290 and smaller in diameter than the main body portion 221, and a second small-diameter portion 222 located on the side of the main body portion 221 further away from the cylindrical body 290 and smaller in diameter than the main body portion 221. The first small-diameter portion 223 of each stopper 220 is inserted into the through hole 291 of the cylindrical body 290. The main body portion 221 of each stopper 220 has a recess 224 into which a protrusion (not shown) of the housing 210 fits. By fitting the protrusion into the recess 224, each stopper 220 is positioned in the front-rear direction relative to the housing 210. As a result, the cylindrical body 290 is positioned in the front-rear direction relative to the housing 210.

[0041] The pressing member 240 is a substantially rectangular parallelepiped member having a through hole 241 extending along its central axis Ax. The pressing member 240 is made of, for example, a resin material. The inner diameter of the through hole 241 of the pressing member 240 is substantially the same as the outer diameter of the cylindrical body 290, and the cylindrical body 290 is inserted into the through hole 241. The upper surface 244 of the pressing member 240 is a plane substantially perpendicular to the vertical direction. A guide projection 245 extending continuously in the front-rear direction is formed on the upper surface 244.

[0042] The pressing member 240 is housed inside the housing 210. The pressing member 240 is movable in the vertical direction. The pressing member 240 can be positioned in a non-pressing position P5 as shown in Figure 10 and a pressing position P6 as shown in Figure 11. The non-pressing position P5 of the pressing member 240 is the position where the through hole 241 of the pressing member 240 is coaxial with the through hole 291 of the cylindrical body 290. When the pressing member 240 is in the non-pressing position P5, the pressing member 240 does not press the cylindrical body 290. The pressing position P6 of the pressing member 240 is a position lower than the non-pressing position P5. When the pressing member 240 is in the pressing position P6, the pressing member 240 presses the central portion of the cylindrical body 290 downward, causing the cylindrical body 290 to elastically deform. As a result, the inner surface of the elastically deformed cylindrical body 290 is pressed against the guide wire GW, thereby fixing the guide wire GW in place.

[0043] The operating member 280 is a substantially cylindrical member extending in a first direction D1. The operating member 280 is formed of, for example, a resin material. The operating member 280 is supported by the support cylinder 250 of the holding mechanism 260, which will be described later, and is movable along the first direction D1. A portion of the base end of the operating member 280 is exposed to the outside from the support cylinder 250. The operator applies pressure to the exposed portion of the operating member 280.

[0044] The force transmission member 230 is a substantially polygonal member. The force transmission member 230 is formed of, for example, a resin material. As shown in Figure 12, the lower surface 234 of the force transmission member 230 is a plane substantially perpendicular to the vertical direction. A guide groove 235 extending continuously in the front-rear direction is formed on the lower surface 234. The guide projection 245 of the pressing member 240 is fitted into the guide groove 235. The force transmission member 230 is movable relative to the pressing member 240 along the front-rear direction while the lower surface 234 of the force transmission member 230 is in contact with the upper surface 244 of the pressing member 240. A projection 232 is formed on the upper base end surface 233 of the force transmission member 230.

[0045] As shown in Figures 10 and 11, the force transmission member 230 is housed in the member housing space 216 of the housing 210. The force transmission member 230 is movable along a first direction D1. As shown in Figure 10, when the force transmission member 230 is in a retracted position P7, retracted upward towards the base end along the first direction D1, the pressing member 240 is in a non-pressing position P5, which does not press the cylindrical body 290. As shown in Figure 11, when the force transmission member 230 moves from the retracted position P7 towards the downward end along the first direction D1, the force transmission member 230 presses the pressing member 240 downward. When the force transmission member 230 moves to an advanced position P8, which is further downward towards the end than the retracted position P7, the pressing member 240 moves to a pressing position P6, which presses the cylindrical body 290.

[0046] The holding mechanism 260 is a so-called double-knock mechanism. The holding mechanism 260 maintains the position of the force transmission member 230 along the first direction D1 while switching between the retracted position P7 and the forward position P8 described above. The holding mechanism 260 includes a support cylinder 250, a rotor 270, and a spring 262. In this embodiment, a part of the operating member 280 also constitutes a part of the holding mechanism 260. The configuration of the holding mechanism 260 is the same as that of the holding mechanism 360 of the opening / closing mechanism 300 described above, so its explanation is omitted. That is, in the description of the configuration of the holding mechanism 360 of the opening / closing mechanism 300 described above, the support cylinder 350 should be read as the support cylinder 250, the rotor 370 as the rotor 270, and the spring 362 as the spring 262.

[0047] As shown in Figure 10, when the holding mechanism 260 is in the rotor retracted position, the force transmission member 230 is in the retracted position P7, and the pressing member 240 is not pressed by the force transmission member 230 and is in the unpressed position P5. In this state, the cylindrical body 290 is not elastically deformed, and the guide wire GW inserted into the main lumen 13 is not fixed. In other words, the fixed valve 200 is in the released state fixed valve 200n.

[0048] For example, when a surgeon's thumb, while gripping the medical connector 10, applies pressure to the operating member 280 diagonally downward along the first direction D1, the operating member 280 moves diagonally downward along the first direction D1. Consequently, the holding mechanism 260 switches from the rotor retracted state to the rotor forward state. In this state, as shown in Figure 11, the force transmission member 230 is in the forward position P8, and the pressing member 240 is pressed by the force transmission member 230 and is in the pressed position P6. The cylindrical body 290 is pressed by the pressing member 240 and elastically deforms, fixing the guide wire GW inserted into the main lumen 13. That is, the fixed valve 200 becomes the fixed valve 200f.

[0049] When the fixed valve 200 is in the fixed state (fixed valve 200f), if an operation is applied to the operating member 280 to press it diagonally downward along the first direction D1, as described above, the operating member 280 moves diagonally downward along the first direction D1. Consequently, the holding mechanism 260 switches from the rotor forward state to the rotor retracted state. In this state, as shown in Figure 10, the force transmission member 230 is in the retracted position P7, and the pressing member 240 is not pressed by the force transmission member 230 and returns to the unpressed position P5 by the elastic restoring force of the cylindrical tubular body 290. The cylindrical tubular body 290 does not undergo elastic deformation because it is not pressed by the pressing member 240, and the fixing of the guide wire GW inserted into the main lumen 13 is released. As a result, the fixed valve 200 returns to the released state (fixed valve 200n).

[0050] In this manner, the holding mechanism 260 maintains the position of the force transmission member 230 while switching the position between a retracted position P7 and an advanced position P8 each time the operating member 280 moves diagonally downward as the operator pushes the operating member 280 diagonally downward. As a result, the position of the pressing member 240 is maintained while switching between a non-pressed position P5 and a pressed position P6, and the state alternates between a fixed state valve 200f in which the guide wire GW is fixed by the cylindrical body 290 and a released state valve 200n in which the fixing of the guide wire GW by the cylindrical body 290 is released.

[0051] (Effects of this embodiment) As described above, in the medical connector 10 of this embodiment, the opening / closing mechanism 300, including the hemostatic valve 320, is positioned on the tip side of the fixed valve 200. Therefore, the pressure of the fluid flowing through the main lumen 13 is received by the hemostatic valve 320, preventing this pressure from acting on the fixed valve 200. Consequently, pressure resistance is not required for the fixed valve 200, and the complexity of the fixed valve 200's structure can be avoided.

[0052] In the medical connector 10 of this embodiment, the hemostatic valve 320 is a duckbill valve. Therefore, the pressure resistance of the hemostatic valve 320 is improved.

[0053] The medical connector 10 of this embodiment has a main lumen 13 connected to the tip side from the hemostatic valve 320, and a branch lumen 14 branching off from the main lumen 13. Therefore, the pressure of the fluid flowing into the main lumen 13 via the branch lumen 14 is received by the hemostatic valve 320, preventing this pressure from acting on the fixed valve 200, and thus avoiding complexity in the configuration of the fixed valve 200.

[0054] The medical connector 10 of this embodiment further includes a through member 330 that opens the hemostatic valve 320. Therefore, the hemostatic valve 320 can be opened and closed by the through member 330.

[0055] In the medical connector 10 of this embodiment, a through-hole 332 is formed in the through-member 330. The through-member 330 is positioned on the proximal end side of the hemostatic valve 320 and is movable in the axial direction of the through-hole 332. The through-member 330 is displaced between a non-pressed position P1 that closes the hemostatic valve 320 and a pressed position P2 that is on the proximal end side of the non-pressed position P1 and opens the hemostatic valve 320 by pressing it. Therefore, the hemostatic valve 320 can be opened and closed by the displacement of the through-member 330 between the non-pressed position P1 and the pressed position P2.

[0056] The medical connector 10 of this embodiment further includes a holding mechanism 360 that holds the through member 330 in a non-pressed position P1 and a pressed position P2. Therefore, the hemostatic valve 320 can be held in both a closed state and an open state.

[0057] (modified version) The technologies disclosed herein are not limited to the embodiments described above and can be modified in various forms without departing from their essence, for example, the following modifications are possible.

[0058] The configuration of the medical connector 10 in the above embodiment is merely an example and can be modified in various ways. For example, as shown in Figure 13, the hemostatic valve 320 may have a plurality of slits 326. The modified hemostatic valve 320 shown in Figure 13 has a first slit 326A and a second slit 326B that intersects with the first slit 326A. This modification realizes a hemostatic valve 320 with high pressure resistance.

[0059] In the medical connector 10 of the above embodiment, a valve other than a duckbill valve may be used as the hemostatic valve 320. For example, another type of check valve may be used as the hemostatic valve 320.

[0060] In the medical connector 10 of the above embodiment, other mechanisms such as a heart-cam mechanism may be used as the retaining mechanism 260 and the retaining mechanism 360. In the medical connector 10 of the above embodiment, at least one of the retaining mechanism 260 and the retaining mechanism 360 may be omitted.

[0061] The medical connector 10 of the above embodiment may also be used to fix other medical devices other than the guide wire GW (for example, a catheter).

[0062] The technologies disclosed herein are not limited to Y connectors, but are similarly applicable to medical connectors in general for securing medical devices.

Claims

1. A fixing valve (200) for securing medical devices, A hemostatic valve (320) positioned towards the tip of the aforementioned fixed valve (200), A medical connector (10) equipped with the following.

2. A medical connector (10) according to claim 1, The hemostatic valve (320) is a duckbill valve (320), and the medical connector (10).

3. A medical connector (10) according to claim 2, The duckbill valve (320) is a medical connector (10) having a first slit (326A) and a second slit (326B) that intersects with the first slit (326A).

4. A medical connector (10) according to any one of claims 1 to 3, The first flow path (13) is connected to the tip side from the hemostatic valve (320), A second channel (14) branched off from the first channel (13), A medical connector (10) equipped with the following.

5. A medical connector (10) according to any one of claims 1 to 4, A medical connector (10) further comprising an opener (330) for opening the hemostatic valve (320).

6. A medical connector (10) according to claim 5, The opener (330) is a through member (330) having a through hole (332) formed therein, which is positioned on the proximal end side of the hemostatic valve (320), is movable in the axial direction of the through hole (332), and includes a through member (330) that can be displaced between a first position (P1) that closes the hemostatic valve (320) and a second position (P2) that is on the distal end side of the first position (P1) and opens the hemostatic valve (320) by pressing it.

7. A medical connector (10) according to claim 6, A medical connector (10) further comprising a holding mechanism (360) for holding the through member (330) in the first position (P1) and the second position (P2).

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