Medical valves and medical valve opening and closing devices

Abstract

To provide a medical valve normally being closed and capable of reliably retaining an open state and a closed state, and opening / closing device of the medical valve.SOLUTION: A hemostasis valve 32 is a valve normally closed and comprised of an elastic material. The hemostasis valve 32 includes a cylindrical base part 32A, a plate-like part 32B provided inside an end portion in one end side of the base part 32A so as to close an opening in the one end side of the base part 32A and including a through-hole formed at a central part, and a projection 32C having a columnar shape and projecting from the central part of the plate-like part 32B to an opposite side of the other end side of the base part 32A. The projection 32C includes a through-hole (a shaft hole) 32e being closed by elastic force in a state with no pressure applied thereto, formed therein, where the through-hole 32e is configured to enlarge the diameter by applying the pressing force to the projection 32C.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a medical valve and an opening and closing device for a medical valve. [Background technology]

[0002] Patent Document 1 proposes a catheter connector that is connected to the base end of a catheter. In this catheter connector, a hard plunger and a compressible plug are disposed in the inner hole of the main body. By rotating a lever that is rotatably provided on the main body, the compression edge of the lever presses the hard plunger and the compressible plug, deforming the compressible plug radially inward. This applies a force to the outer periphery of the catheter, and the catheter connector is connected to the catheter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4452620 Summary of the Invention [Problem to be solved by the invention]

[0004] In the catheter connector disclosed in Patent Document 1, the compressible plug, which is a valve, is normally open, and a valve that is normally closed is not disclosed in Patent Document 1. Even if the compressible plug of Patent Document 1 is configured to be normally closed and the closed compressible plug is configured to be opened by a hard plunger and lever, it may not operate properly.

[0005] An object of the present disclosure is to provide a medical valve and an opening and closing device for a medical valve that are normally in a closed state and can reliably maintain the closed and open states. [Means for solving the problem]

[0006] In order to achieve the above object, a medical valve according to one aspect of the present disclosure is a valve made of an elastic material and normally in a closed state, and comprises a cylindrical base, a plate-like portion provided inside an end portion of one end of the base so as to block the opening at one end of the base and having a through hole formed in its center, and a cylindrical protrusion protruding from the center of the plate-like portion to the side opposite the other end of the base, wherein an axial hole is formed in the protrusion which is in a closed state due to an elastic force when no pressing force is applied, and the axial hole is configured to expand in diameter when a pressing force is applied to the protrusion.

[0007] A medical valve opening and closing device according to one aspect of the present disclosure includes a case, a holding portion provided within the case, the above-mentioned valve held in the holding portion, and a cylindrical penetrating body supported on the case so as to be movable along the axial direction of the base and capable of pressing against the plate-like portion to expand the axial hole of the protrusion.

[0008] The case may further include a pressing section provided within the case and having a pressed section and the penetrating body, and an operating section supported on the case so as to be movable along a direction perpendicular to the axial direction of the base and having an inclined section inclined with respect to the axial direction of the base, wherein the operating section is configured to move along the direction perpendicular to the axial direction of the base, so that the inclined section presses the pressed section to move the pressing section and move the penetrating body by moving the operating section along the direction perpendicular to the axial direction of the base.

[0009] The case may further include a pressing section provided within the case and having a pressed section and the penetrating body, and an operating section rotatably attached to the case, wherein the operating section has a cam that abuts against the pressed section and has an outer circumferential surface whose distance from a rotation axis changes circumferentially, and the cam may be rotated by rotating the operating section, and the outer circumferential surface may press the pressed section to move the pressing section, thereby moving the penetrating body.

[0010] The operating unit may have an operating lever connected to the cam, and the distance between a free end of the operating lever and the rotation shaft may be longer than the distance between the rotation shaft and the outer peripheral surface of the cam. Effect of the Invention

[0011] According to the present disclosure, it is possible to provide a valve and a valve opening and closing device that are normally closed and can reliably maintain the closed and open states. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view of an opening and closing device for a medical valve according to a first embodiment. FIG. [Diagram 2] 2 is a perspective view of the opening and closing device in a state in which the lever shown in FIG. 1 is raised. [Diagram 3] 2 is an external view of a tourniquet section in a closed state and a fixing section in an open state provided in the case of FIG. 1. [Figure 4] 3 is a cross-sectional view of a tourniquet section in a closed state and a fixing section in an open state provided in the case of FIG. 2. [Diagram 5] 5A and 5B are explanatory views of the hemostatic valve shown in FIG. 4, where (a) is a perspective view of the hemostatic valve, and (b) is a cross-sectional view of the hemostatic valve. [Figure 6] 6A and 6B are explanatory views of a method for producing the hemostatic valve shown in FIG. 5, where (a) is a perspective view of the hemostatic valve during the manufacturing process, and (b) is a cross-sectional view of the hemostatic valve during the manufacturing process. [Figure 7] FIG. 5 shows a perspective view of the fixed valve shown in FIGS. [Figure 8] 5A and 5B are perspective views of the second pressing portion shown in FIGS. 3 and 4, where (a) is a perspective view from the rear, and (b) is a perspective view from the front. [Figure 9] 2 is an external view of a tourniquet section in an open state and a fixing section in an open state provided in the case of FIG. 1. [Figure 10] 2 is a cross-sectional view of a tourniquet section in an open state and a fixing section in an open state provided in the case of FIG. 1. [Figure 11] 2 is an external view of a tourniquet section in an open state and a fixing section in a closed state provided in the case of FIG. 1. [Figure 12] 2 is a cross-sectional view of a tourniquet section in an open state and a fixing section in a closed state provided in the case of FIG. 1. [Figure 13] FIG. 11 is a perspective view of an opening and closing device for a medical valve according to a second embodiment. [Figure 14] 14 is a perspective view of the opening and closing device in a state in which a button portion of the operation unit of the opening and closing device in FIG. 13 is protruding from an opening of a protruding portion. [Figure 15] 14 is an external view of a tourniquet section in a closed state and a fixing section in an open state provided in the case of FIG. 13. [Figure 16] 15 is an external view of a tourniquet section in a closed state and a fixing section in a closed state provided in the case of FIG. 14. [Figure 17] 13A and 13B are external views of a hemostasis section in a closed state and a fixing section in an open state that are provided within a case of an opening and closing device of a medical valve according to a third embodiment. [Figure 18] FIG. 13 is a perspective view of an opening and closing device for a medical valve according to a fourth embodiment. [Figure 19] FIG. 19 is an exploded perspective view of a case of the opening and closing device shown in FIG. [Figure 20] 19 is a perspective view of a tourniquet section in an open state and a fixing section in a closed state in the opening and closing device shown in FIG. 18. [Figure 21] 21 is a cross-sectional view of a tourniquet part in an open state and a fixing part in a closed state in the opening and closing device shown in FIG. 20. [Figure 22] FIG. 22 is a perspective view of the first pressing portion of FIG. 21. [Figure 23] FIG. 22 is a partial cross-sectional external view of the tourniquet in the open state of FIG. 21. [Figure 24] 19 is a partial cross-sectional external view of the tourniquet unit in the opening and closing device shown in FIG. 18 in a half-open state. [Diagram 25] 19 is a partial cross-sectional external view of a hemostasis portion in an open state in the valve opening and closing device shown in FIG. 18. [Figure 26] 19 is a cross-sectional view of a hemostasis part in an open state and a fixing part in an open state in the valve opening and closing device shown in FIG. 18. [Figure 27] 25 is a partial cross-sectional external view of the tourniquet portion when the pressing cam is moving from the closed state of FIG. 23 to the half-open state of FIG. 24. [Figure 28]22 is a perspective view of the second pressing portion shown in FIG. 21. FIG. [Figure 29] 22 is a partial cross-sectional external view of the fixing part in the open state of FIG. 21. FIG. [Diagram 30] 19 is a partial cross-sectional external view of a fixing part in a half-closed state in the valve opening and closing device shown in FIG. 18. FIG. [Diagram 31] 19 is a partial cross-sectional external view of a fixing part in an open state of the valve opening and closing device shown in FIG. 18. [Diagram 32] 19 is a cross-sectional view of a hemostasis part in a closed state and a fixing part in a closed state in the valve opening and closing device shown in FIG. 18. [Diagram 33] 32 is a partial cross-sectional external view of the fixing part when the pressing cam is moving from the half-closed state of FIG. 30 to the closed state of FIG. 31. FIG. [Diagram 34] FIG. 13 is a perspective view of a second pressing portion according to the fifth embodiment. [Diagram 35] FIG. 13 is a partial cross-sectional external view of a fixing part in an open state according to a fifth embodiment. [Diagram 36] 36 is a partial cross-sectional external view of the fixing part in the half-closed state of FIG. 35. FIG. [Figure 37] 36 is a partial cross-sectional external view of the fixing part in the open state of FIG. 35. FIG. [Figure 38] FIG. 11 is a perspective view of a first pressing portion according to a modified example. [Figure 39] FIG. 13 is a partial cross-sectional external view of a hemostasis portion according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A medical valve and an opening and closing device for a medical valve according to one embodiment of the present disclosure are a medical valve and an opening and closing device for a medical valve used when inserting a catheter or the like into a treatment site, and will be described below with reference to the drawings.

[0014] <First embodiment> Hereinafter, a medical valve and an opening / closing device for the medical valve according to a first embodiment of the present disclosure will be described. Fig. 1 is a perspective view of the opening / closing device. Fig. 2 is a perspective view of the opening / closing device in a state where the lever shown in Fig. 1 is pulled up.

[0015] 1 and 2, the opening and closing device 1 is a so-called Y connector, and includes a pipe section 10 and a valve section 20. The pipe section 10 and the valve section 20 are made of synthetic resin. In Fig. 1, the lower left side of the pipe section 10 is the tip side, and the upper right side of the valve section 20 is the base end side.

[0016] The tube section 10 has a first tube section 11 and a second tube section 12. The first tube section 11 is tubular, its axis extends linearly, and is connected to the valve section 20. The second tube section 12 is tubular, its axis extends linearly, and is connected to an intermediate portion of the first tube section 11. The lumen of the first tube section 11 and the lumen of the second tube section 12 are connected to each other. When the opening and closing device 1 is used, the tip of the first tube section 11 is connected to a guiding catheter, a filament such as a catheter or a guidewire is inserted into the lumen of the first tube section 11, and an injector for injecting physiological saline or the like is connected to the second tube section 12.

[0017] The valve portion 20 includes a case 21, a hemostasis portion 30 (FIGS. 3 and 4), and a fixing portion 40. The case 21 has a first case portion 22, a second case portion 23, and a pair of lever support portions 24.

[0018] The second case portion 23 has a first case portion 22, a second case portion 23, and a pair of lever support portions 24. The first case portion 22 has a rectangular parallelepiped shape with one side open. An insertion hole (not shown) is formed in the wall located opposite the opening of the first case portion 22. A semicircular notch 22a is formed in each of the walls located at both ends in the longitudinal direction of the first case portion 22. The second case portion 23 has a rectangular parallelepiped shape with one side open. An insertion hole (not shown) is formed in the wall located opposite the opening. A semicircular notch 23a is formed in each of the walls located at both ends in the longitudinal direction of the second case portion 23.

[0019] The first case part 22 and the second case part 23 are connected to each other so that the opening of the first case part 22 and the opening of the second case part 23 are aligned, whereby the first case part 22 and the second case part 23 form a single hollow rectangular parallelepiped. The hemostatic part 30 and a part of the fixing part 40 are housed in the first case part 22 and the second case part 23. By connecting the first case part 22 and the second case part 23, the semicircular notch 22a and the semicircular notch 23a are aligned to form a single circular insertion hole 25. The first tube part 11 is inserted into the insertion hole 25 on the tip side, and the first pressing part 33 described later is inserted into the insertion hole 25 on the base end side.

[0020] FIG. 3 is an external view of the hemostasis unit 30 in the closed state and the fixing unit 40 in the open state, which are provided in the case 21 of FIG. 1. FIG. 4 is a cross-sectional view thereof. The hemostasis unit 30 has a first holding unit 31, a hemostasis valve 32, and a first pressing unit 33. The first holding unit 31 is fixed in the case 21. The first holding unit 31 has a first inner cavity 31a and is substantially cylindrical, and has a large diameter unit 34, a medium diameter unit 35, and a small diameter unit 36. The large diameter unit 34 has an outer diameter larger than the medium diameter unit 35, and the medium diameter unit 35 has an outer diameter larger than the small diameter unit 36. The large diameter unit 34 has an inner diameter larger than the medium diameter unit 35, and the medium diameter unit 35 has an inner diameter larger than the small diameter unit 36. An O-ring 37 is attached to an annular groove formed on the outer circumferential surface of the small diameter unit 36.

[0021] FIG. 5 is an explanatory diagram of the hemostatic valve 32 shown in FIG. 4, where (a) is a perspective view of the hemostatic valve 32 and (b) is a cross-sectional view of the hemostatic valve 32. The hemostatic valve 32 is made of an elastic material such as silicone rubber, and is pressed into and held in the large diameter portion 34 of the first holding portion 31. The hemostatic valve 32 is normally in a closed state and has a cylindrical base portion 32A, a disk-shaped plate-shaped portion 32B, and a protruding portion 32C. The plate-shaped portion 32B is provided on the inside of the end portion on the tip side of the base portion 32A so as to close the opening on the tip side of the base portion 32A. A through hole 32d is formed in the center of the plate-shaped portion 32B. The protruding portion 32C is substantially columnar (cylindrical) and protrudes from the center of the plate-shaped portion 32B toward the tip side. A through hole 32e is formed in the protruding portion 32C penetrating along its axial direction. The through hole 32e is, for example, an axial hole that is always in a closed state (when no pressing force is applied), such as a pinhole or a needle hole whose inner diameter is very small. The inner diameter of the through hole 32e may be of any size that can suppress blood leakage to the base end side. The thickness of the protruding portion 32C is configured to be thicker on the tip side (free end side) than on the base end side. The diameters of the through hole 32d and the through hole 32e gradually decrease from the base end side to the tip side. The diameters of the through hole 32d and the through hole 32e along the axial direction of the base portion 32A are small at the end on the base end side, very large in the center of the plate-shaped portion 32B, and gradually decrease from there toward the tip (protruding portion 32C).

[0022] Figure 6 is an explanatory diagram of a method for producing the hemostatic valve 32 shown in Figure 5, where (a) is a perspective view of the hemostatic valve 32 during the production process, and (b) is a cross-sectional view of the hemostatic valve 32 during the production process. During the production process, the hemostatic valve 32 is produced so that its protruding portion 32C protrudes inside the base portion 32A, i.e., from the center of the plate-shaped portion 32B toward the base end side. Thereafter, the protruding portion 32C is made to protrude inwardly toward the tip end side of the plate-shaped portion 32B, thereby producing the hemostatic valve 32 having the through holes 32d and 32e shown in Figure 5.

[0023] As shown in FIGS. 3 and 4, the first pressing portion 33 has a cylindrical penetrating body 33A, a first flange portion 33B, and a stopper 33C.

[0024] The penetrator 33A extends along the axial direction of the base 32A and has a second bore 33d. The first flange portion 33B is provided at the base end of the penetrator 33A. The stopper 33C is substantially cylindrical and provided on the outer periphery of the penetrator 33A, and extends from the surface of the tip side of the first flange portion 33B toward the tip side. The tip end of the stopper 33C is provided with a second flange portion 33E. The stopper 33C is inserted into an insertion hole 25 (FIG. 2) on the base end side of the case 21, and the first pressing portion 33 is supported so as to be reciprocable along the axial direction of the base 32A relative to the case 21. The first flange portion 33B is located outside the case 21, and the second flange portion 33E is located inside the case 21. The second flange portion 33E prevents the first pressing portion 33 from coming off the case 21.

[0025] When the first pressing portion 33 is positioned at the most proximal end side, the tip of the penetrating body 33A is positioned within the through hole 32d of the plate-shaped portion 32B. When the surgeon presses the first pressing portion 33 toward the distal end side, the tip of the penetrating body 33A presses the plate-shaped portion 32B to expand the through holes 32d and 32e. When the surgeon stops pressing the first pressing portion 33, the first pressing portion 33 is pushed back toward the proximal end side by the elastic force of the plate-shaped portion 32B and the protruding portion 32C, and the hemostatic valve 32 returns to the closed state.

[0026] The fixed part 40 has a second holding part 41, a fixed valve 42, a second pressing part 43, a coil spring 44, an operating part 45, and a lever 46. The second holding part 41 has a substantially rectangular parallelepiped shape with an opening on the base end side, and is fixed inside the case 21 so as to be immovable relative to the case 21. The first pipe part 11 is connected to the second holding part 41.

[0027] FIG. 7 shows a perspective view of the fixed valve 42 shown in FIGS. 3 and 4. The fixed valve 42 is made of an elastic material such as silicone rubber, and is pressed into and held in the second holding portion 41. As shown in FIGS. 4 and 7, the fixed valve 42 is normally open, has a cylindrical shape, and has a third lumen 42a. The fixed valve 42 is formed with an annular groove 42b that opens on the end face on the base end side and whose depth direction is from the base end side to the tip end side along the axial direction of the fixed valve 42. The fixed tube portion 42C between the third lumen 42a and the groove 42b in the fixed valve 42 is configured so that its thickness is thicker on the tip end side (where the groove 42b is deep) than on the base end side (where the groove 42b is shallow). In this embodiment, the fixed tube portion 42C is configured so that its thickness increases stepwise outward from the base end side toward the tip end side. For this reason, the groove 42b is configured so that its radial width is narrowed stepwise from the base end side toward the tip end side. As described later, the fixed cylindrical portion 42C comes into contact with the catheter, and the catheter is fixed to the valve opening and closing device 1.

[0028] 3 and 4. The second pressing portion 43 is substantially cylindrical and has a fourth cavity 43a. The second pressing portion 43 has a pressing body 43B, an insertion portion 43C, a third flange portion 43D, a support portion 43E, and a pair of pressed portions 43F.

[0029] The pressing body 43B is cylindrical and is configured so that the thickness of the pressing body 43B is thinner at the tip side than at the base end side. In this embodiment, the pressing body 43B is gradually thinner from the base end side to the tip side. The insertion part 43C is cylindrical and extends from the base end of the pressing body 43B toward the base end side. The fourth inner cavity 43a in the insertion part 43C has a larger diameter than the pressing body 43B. The small diameter part 36 of the first holding part 31 is inserted into the insertion part 43C, and the second pressing part 43 is supported by the small diameter part 36 so as to be reciprocable along its axial direction. An O-ring 37 abuts against the inner peripheral surface of the insertion part 43C.

[0030] The third flange portion 43D is rectangular and is provided at the base end of the pressing body 43B. The support portion 43E has a pair of pillar portions 43E1 and an annular plate portion 43E2. The pair of pillar portions 43E1 are plate-shaped and are provided near a pair of opposing sides of the base end side surface of the third flange portion 43D, respectively, and extend toward the base end side. The plate portion 43E2 is rectangular and is provided at the base end of the pair of pillar portions 43E1. Each pillar portion 43E1 is connected to a pair of opposing sides of the tip end side surface of the plate portion 43E2. Each pillar portion 43E1 faces an insertion hole (not shown) of the first case portion 22 and the second case portion 23. A gap 43g is formed between the plate portion 43E2 and the insertion portion 43C.

[0031] The pair of pressed portions 43F are provided on a pair of opposing sides of the surface of the tip end of the plate portion 43E2, which are different from the pair of opposing sides to which the pair of column portions 43E1 are connected. The pressed portion 43F has a first inclined surface 43F1 and a first flat surface 43F2. The first inclined surface 43F1 is inclined so that the thickness of the pressed portion 43F increases toward the tip end as it moves away from the lever 46 side. The first flat surface 43F2 is a flat surface perpendicular to the axial direction of the insertion portion 43C, and is located on the opposite side to the lever 46 side of the first inclined surface 43F1.

[0032] 4, the coil spring 44 is interposed between the medium diameter portion 35 of the first holding portion 31 and the third flange portion 43D. The coil spring 44 passes through a gap 43g between the plate portion 43E2 and the insertion portion 43C. The coil spring 44 constantly biases the second pressing portion 43 toward the tip side.

[0033] 3, the operating portion 45 has a rectangular ring shape, through whose interior the insertion portion 43C of the second pressing portion 43, the pair of pillar portions 43E1, and the coil spring 44 pass. The operating portion 45 is supported movably relative to the case 21 so as to pass through insertion holes (not shown) of the first case portion 22 and the second case portion 23 along the direction in which the first case portion 22 and the second case portion 23 face each other (a direction perpendicular to the axial direction of the insertion portion 43C (axial direction of the base portion 32A)).

[0034] The operation section 45 has a pair of long parts 45A extending in a direction in which the first case section 22 and the second case section 23 face each other, and a pair of short parts 45B shorter than the long parts 45A. The long parts 45A face each pressed part 43F of the second pressing section 43 in the axial direction of the fourth inner cavity 43a. The long parts 45A are tapered from the second case section 23 side to the first case section 22 side. Specifically, the long parts 45A have a first side part 45C, an inclined side part 45D as an inclined part, and a second side part 45E on the pressed part 43F side. The first side part 45C is a side part perpendicular to the axial direction of the insertion section 43C (a side part parallel to the first plane 43F2 and the surface on the tip side of the plate part 43E2). The inclined side portion 45D is connected to the first side portion 45C and is inclined so as to approach the tip side as it moves away from the lever 46. That is, the inclined side portion 45D is inclined with respect to the axial direction of the insertion portion 43C. The second side portion 45E is connected to the inclined side portion 45D and is a side portion (a side portion parallel to the first plane 43F2 and the surface on the tip side of the plate portion 43E2) perpendicular to the axial direction of the insertion portion 43C.

[0035] When the second pressing portion 43 is in a position to close the fixed valve 42, the first side portion 45C, the inclined side portion 45D, and the second side portion 45E abut against the tip side surface of the plate portion 43E2, the first inclined surface 43F1, and the first flat surface 43F2, respectively. When the second pressing portion 43 is in a position to open the fixed valve 42, the first side portion 45C abuts against the first flat surface 43F2 (see FIG. 11).

[0036] As shown in Figs. 1 and 2, one end of the lever 46 is supported to be able to swing on the tip end of the pair of lever support parts 24. The lever 46 abuts against the operating part 45 between the swing shaft and the free end. Therefore, the operating part 45 and the second pressing part 43 can be moved with a small load by the principle of leverage. When the surgeon pushes the lever 46 so that the other end approaches the second case part 23, the operating part 45 is pushed, and the part of the operating part 45 opposite to the lever 46 side protrudes from the case 21 as shown in Figs. 1 and 3. At this time, the inclined side part 45D of the operating part 45 pushes the first inclined surface 43F1 of the pressed part 43F of the second pressing part 43, and the second pressing part 43 moves to the base end side. As a result, the pressing body 43B of the second pressing part 43 also moves to the base end side, and the fixed valve 42 is in an open state as shown in Fig. 4. When the first side portion 45C of the operating portion 45 abuts against the first flat surface 43F2 of the pressed portion 43F, the second pressing portion 43 does not move toward the tip side, and the fixed valve 42 is maintained in an open state.

[0037] 1 and 3, by pressing the part of the operating part 45 protruding from the case 21, the operating part 45 moves toward the lever 46. As a result, the inclined side 45D of the operating part 45 moves the second pressing part 43 toward the tip side due to the biasing force of the coil spring 44, the pressing body 43B penetrates deeply into the groove 42b of the fixed valve 42, the fixed cylinder part 42C is pushed inward, the third lumen 42a is narrowed, and the fixed valve 42 is closed (see FIG. 12).

[0038] Next, a method of using the opening and closing device 1 will be described. Fig. 9 is an external view of the tourniquet unit 30 in the open state and the fixing unit 40 in the open state provided in the case 21 of Fig. 1. Fig. 10 is a cross-sectional view thereof. Fig. 11 is an external view of the tourniquet unit 30 in the open state and the fixing unit 40 in the closed state provided in the case 21 of Fig. 1. Fig. 12 is a cross-sectional view thereof.

[0039] First, a guiding catheter (not shown) is attached to the tip of the first tube portion 11 of the opening / closing device 1 in which the hemostasis portion 30 and the fixing portion 40 shown in Figs. 3 and 4 are in an open state, and the guiding catheter is inserted to the treatment site. After the guiding catheter is inserted to the treatment site, the tip of the first tube portion 11 of the opening / closing device 1 may be attached to the guiding catheter. Thereafter, with the hemostasis valve 32 and the fixing valve 42 open, a guidewire (filament) is inserted from the second lumen 33d of the first pressing portion 33 and introduced into the first lumen 31a of the first holding portion 31. After the tip of the guidewire passes through the hemostasis valve 32, the hemostasis valve 32 is closed. Since the inner circumferential surface of the protruding portion 32C of the hemostasis valve 32 is in close contact with the guidewire, leakage of blood or the like from the tip side to the base end side of the hemostasis valve 32 is suppressed. Depending on the thickness of the guidewire, the hemostatic valve 32 may be inserted in a slightly open state so as not to leak much blood while the first pressing part 33 is pressed. That is, as shown in Figures 9 and 10, the first pressing part 33 may be moved toward the distal end, and the penetrator 33A may press the plate-shaped part 32B of the hemostatic valve 32 to slightly expand the through holes 32d and 32e, and then the introduction member may be introduced.

[0040] By further moving the guidewire toward the distal end, it reaches the first tubular portion 11 via the third lumen 42a of the second pressing portion 43, and is introduced into the guiding catheter attached to the distal end of the first tubular portion 11. After the guidewire reaches the treatment site, the catheter is inserted along the guidewire. At this time, the hemostatic valve 32 is kept open, as when the guidewire was inserted.

[0041] 11 and 12, the surgeon presses the portion of the operating part 45 protruding from the case 21 to move the operating part 45 toward the lever 46. As a result, the second pressing part 43 moves toward the tip side due to the biasing force of the coil spring 44 by the inclined side portion 45D of the operating part 45, and the pressing body 43B penetrates deeply into the fixed valve 42. This reduces the diameter of the third lumen 42a of the second pressing part 43, and the fixed valve 42 enters a closed state in which it is in close contact with the catheter. As a result, the catheter is fixed to the opening and closing device 1.

[0042] From this state, the guidewire is pulled out. At this time, since the hemostasis valve 32 is closed, blood leakage can be suppressed. Then, depending on the treatment method, a treatment instrument such as a balloon catheter or a stent is inserted using the lumen of the catheter to perform treatment. When the catheter is pulled out after the treatment is completed, the fixed valve 42 is opened as shown in Figs. 3 and 4. Specifically, the lever 46 is pressed to move the operation part 45 to the side opposite to the lever 46 side. As a result, the second pressing part 43 is moved to the base end side by the inclined side part 45D of the operation part 45, and the third lumen 42a of the second pressing part 43 is expanded in diameter. The blood flows back up to the hemostasis valve 32, but is stopped by the hemostasis valve 32, and further backflow is prevented. Then, after the catheter is pulled out, the guiding catheter is pulled out, and the treatment is completed.

[0043] An injector or the like for injecting a liquid agent is connected to the second tube section 12 of the tube section 10, and a liquid agent such as physiological saline is supplied. The supplied liquid agent enters the guiding catheter via the first tube section 11 and is administered to the position of the treatment target.

[0044] As described above, the hemostatic valve 32 of the present disclosure is a valve that is normally in a closed state and is made of an elastic material. The hemostatic valve 32 includes a cylindrical base 32A, a plate-shaped portion 32B that is provided inside the end of one end of the base 32A so as to close the opening on one end of the base 32A and has a through hole formed in the center, and a cylindrical protruding portion 32C that protrudes from the center of the plate-shaped portion 32B to the opposite side to the other end of the base 32A. The protruding portion 32C is formed with a through hole (axial hole) 32e that is in a closed state by elastic force when no pressing force is applied, and is configured to expand the diameter of the through hole 32e when a pressing force is applied to the protruding portion 32C. Therefore, it is possible to provide a hemostatic valve 32 that can reliably maintain a closed state and an open state.

[0045] The opening and closing device 1 includes a case 21, a first holding part 31 provided in the case 21, a hemostasis valve 32 held by the first holding part 31, and a cylindrical penetrating body 33A that is supported movably along the axial direction of a base part 32A relative to the case 21 and can press a plate-like part 32B to expand a diameter of a through hole 32e of a protruding part 32C. According to this configuration, the hemostasis valve 32, which is in a closed state, can be easily opened by the penetrating body 33A.

[0046] <Second embodiment> Next, an opening and closing device for a medical valve according to a second embodiment of the present disclosure will be described with reference to the drawings. The same members as those in the opening and closing device 1 of the first embodiment will be given the same reference numbers and will not be described, and only configurations different from those in the opening and closing device 1 of the first embodiment will be described.

[0047] Fig. 13 is a perspective view of the opening and closing device 101. Fig. 14 is a perspective view of the opening and closing device 101 in a state in which the button portion 146 of the operation portion 145 of the opening and closing device 101 in Fig. 13 protrudes from the opening 123b of the protruding portion 123A. As shown in Figs. 13 and 14, the opening and closing device 101 has a configuration of the second case portion 123 and the operation portion 145 that is different from the configurations of the second case portion 23 and the operation portion 45 of the first embodiment.

[0048] 13 and 14, a rectangular cylindrical protrusion 123A is provided on the wall located on the opposite side of the opening of second case portion 123. Button portion 146 of operation portion 145 described below can appear and disappear through opening 123b of protrusion 123A.

[0049] Fig. 15 is an external view of the hemostasis unit 30 in the closed state and the fixing unit 40 in the open state, which are provided in the case 21 of Fig. 13. Fig. 16 is an external view of the hemostasis unit 30 in the closed state and the fixing unit 40 in the closed state, which are provided in the case 21 of Fig. 14. The operating unit 145 is substantially L-shaped in a plan view, and has a button unit 146 at the end on the protruding portion 123A side. The button unit 146 extends from the end of the operating unit 145 to the base end side. As shown in Figs. 13 and 14, the button unit 146 may have three projections extending from the front end to the base end side, but the present invention is not limited to this shape.

[0050] 13 and 15, by pressing the part of the operation part 145 protruding from the case 21, the operation part 145 moves toward the button part 146 side. As a result, the second pressing part 43 moves toward the tip side by the biasing force of the coil spring 44 by the inclined side part 45D of the operation part 145, and the pressing body 43B penetrates deeply into the fixed valve 42, and the fixed valve 42 is in a closed state (see FIG. 12). On the other hand, when the surgeon presses the button part 146 toward the first case 21 side, the operation part 145 is pressed, and the part of the operation part 145 opposite to the button part 146 side protrudes from the case 21 as shown in FIG. 13 and 15. At this time, the first inclined surface 43F1 of the pressed part 43F of the second pressing part 43 is pressed by the inclined side part 45D of the operation part 45, and moves toward the base end side. As a result, the pressing body 43B of the second pressing portion 43 also moves toward the base end side, and the fixed valve 42 enters an open state.

[0051] The opening and closing device 101 of this embodiment can also achieve the same effects as the opening and closing device 1 of the first embodiment.

[0052] <Third embodiment> Next, an opening and closing device for a medical valve according to a third embodiment of the present disclosure will be described with reference to the drawings. The same members as those in the opening and closing device 101 of the second embodiment will be given the same reference numerals and will not be described. Only configurations different from the opening and closing device 101 of the second embodiment will be described.

[0053] 17 is an external view of a hemostasis unit 230 in a closed state and a fixing unit 40 in an open state, which are provided in a case 221 of an opening / closing device 201 of the present embodiment. The configurations of the case 221 and the hemostasis unit 230 of the opening / closing device 201 of the present embodiment are different from the configurations of the case 21 and the hemostasis unit 30 of the opening / closing device 101 of the second embodiment.

[0054] In case 221, first case portion 222 is longer in the longitudinal direction than first case portion 22, and has two insertion holes (not shown) formed therein. Second case portion 223 is longer in the longitudinal direction than second case portion 23, and is provided with protruding portion 223A having the same shape as protruding portion 123A on the base end side of protruding portion 123A. Button portion 234C of operation portion 234 can appear and disappear through the opening of protruding portion 223A.

[0055] The hemostasis portion 230 has a first holding portion 31, a hemostasis valve 32 (see FIGS. 4 and 5), a third pressing portion 250, a coil spring 233, an operating portion 234, and a spring support portion 235.

[0056] The third pressing portion 250 has a configuration similar to that of the second pressing portion 43. Therefore, the third pressing portion 250 is substantially cylindrical and has an inner cavity (not shown). The third pressing portion 250 has a penetrating body 251, an insertion portion 252, a flange portion 253, a support portion 254, and a pair of pressed portions 255.

[0057] The penetrating body 251 is cylindrical and has the same outer and inner diameters as the penetrating body 33A of the second embodiment. The cylindrical portion 235A of the spring support portion 235 is inserted into the insertion portion 252, and the third pressing portion 250 is supported by the cylindrical portion 235A so as to be movable along its axial direction. The support portion 254 has a pair of pillar portions 254A and an annular plate portion 254B. The pressed portion 255 has a first inclined surface 255A and a first flat surface 255B.

[0058] The coil spring 233 is interposed between the spring support portion 235 and the flange portion 253. The coil spring 233 passes through the gap between the plate portion 254B and the insertion portion 252. The coil spring 233 constantly biases the third pressing portion 250 towards the tip side.

[0059] The operation portion 234 has a rectangular ring shape, through whose interior the insertion portion 252 of the third pressing portion 250, the pair of pillar portions 254A, and the coil spring 233 pass. The operation portion 234 is supported movably relative to the case 221 so as to pass through insertion holes (not shown) of the first case portion 222 and the second case portion 223 along the direction in which the first case portion 222 and the second case portion 223 face each other.

[0060] The operating portion 234 has the same shape as the operating portion 145. The operating portion 234 has a pair of long sides 234A, a pair of short sides 234B, and a button portion 234C. Each long side 234A has a first side 234D, an inclined side 234E, and a second side 234F on the side of each pressed portion 255.

[0061] 17, by pressing the part of the operation part 234 protruding from the first case part 222, the operation part 234 moves toward the button part 234C side. As a result, the third pressing part 250 moves toward the tip side by the biasing force of the coil spring 233 due to the inclined side part 234E of the operation part 234, and the penetrating body 251 presses the plate-shaped part 32B and the protruding part 32C of the hemostasis valve 32, and expands the through hole 32d and the through hole 32e. As a result, the hemostasis valve 32 is opened. On the other hand, by the operator pressing the button part 234C toward the first case 221 side, the operation part 234 is pressed, and the part of the operation part 234 opposite to the button part 234C side protrudes from the first case part 222. At this time, the third pressing portion 250 moves toward the base end side as the first inclined surface 255A of the pressed portion 255 is pressed by the inclined side portion 234E of the operating portion 234. As a result, the penetrating body 251 of the third pressing portion 250 also moves toward the base end side, and the hemostatic valve 32 is brought into a closed state.

[0062] The opening and closing device 1 further includes a third pressing part 250 provided in the case 21 and having a pressed part 255 and a penetrating body 251, and an operating part 234 supported movably along a direction perpendicular to the axial direction of the base 32A relative to the case 21 and having an inclined side part 234E inclined with respect to the axial direction of the base 32A. By moving the operating part 234 along a direction perpendicular to the axial direction of the base 32A, the inclined side part 234E presses the pressed part 255 to move the third pressing part 250, thereby moving the penetrating body 251. This allows the penetrating body 251 to be moved with a small load.

[0063] <Fourth embodiment> Next, an opening / closing device for a medical valve according to a fourth embodiment of the present disclosure will be described with reference to the drawings. The same members as those in the opening / closing device 1 of the first embodiment are given the same reference numbers and descriptions thereof will be omitted. Fig. 18 is a perspective view of the opening / closing device. Fig. 19 is an exploded perspective view of the case of the opening / closing device shown in Fig. 18.

[0064] The opening and closing device 301 includes a pipe portion 10 and a valve portion 320. The valve portion 320 includes a case 321, a hemostasis portion 330 (FIGS. 20 and 21), and a fixing portion 340 (FIGS. 20 and 21). The case 321 has a first case portion 322 and a second case portion 323.

[0065] The first case part 322 has a rectangular parallelepiped shape with one side open. A pair of insertion holes 322a, 322b are formed in the wall located on the opposite side of the opening of the first case part 322. A semicircular notch 322c is formed in each of the walls located on both ends of the longitudinal direction of the first case part 322. The second case part 323 has a rectangular parallelepiped shape with one side open. A semicircular notch 323a is formed in each of the walls located on both ends of the longitudinal direction of the second case part 323.

[0066] By connecting the first case part 322 and the second case part 323 so that the opening of the first case part 322 and the opening of the second case part 323 are aligned, the first case part 322 and the second case part 323 form a single hollow rectangular parallelepiped. The hemostasis part 330 and a part of the fixing part 340 are housed in the first case part 322 and the second case part 323. By connecting the first case part 322 and the second case part 323, the semicircular notch 322a and the semicircular notch 323a are aligned to form a single circular insertion hole 325. The first tube part 11 is inserted into the insertion hole 325 on the tip side.

[0067] Fig. 20 is a perspective view of the tourniquet unit 330 in the open state and the fixing unit 340 in the closed state of the opening and closing device 301 shown in Fig. 18. Fig. 21 is a cross-sectional view thereof.

[0068] The hemostasis part 330 has a first holding part 31, a hemostasis valve 32, a first pressing part 333, a valve fixing part 334, and a first operating part 338. The first holding part 31 is fixed to the case 321. The hemostasis valve 32 is made of an elastic material such as silicone rubber, and is held by the large diameter part 34 of the first holding part 31. The valve fixing part 334 has a substantially cylindrical shape and a disk-shaped lid part 334A having a through hole, a cylindrical first fixing part 334B, and a cylindrical second fixing part 334C provided on the outer periphery of the first fixing part 334B. The valve fixing part 334 is pressed into the large diameter part 34 of the first holding part 31 so as to close the opening of the large diameter part 34 with the base part 32A of the hemostasis valve 32 sandwiched between the first fixing part 334B and the second fixing part 334C. As a result, the hemostasis valve 32 is held by the first holding portion 31.

[0069] The first pressing portion 333 is supported in the case 321 so as to be movable along the axial direction of the hemostasis valve 32 relative to the case 321. FIG. 22 is a perspective view of the first pressing portion 333 in FIG. 21. As shown in FIGS. 21 and 22, the first pressing portion 333 has a cylindrical penetrating body 333A and a pressed portion 333B. The first pressing portion 333 is substantially cylindrical and has a second inner cavity 333c. The pressed portion 333B is connected to the base end of the penetrating body 333A. The pressed portion 333B has a main body portion 333D and a pair of rectangular flange portions 333E provided at both ends of the main body portion 333D in the axial direction of the first holding portion 31.

[0070] FIG. 23 is a partial cross-sectional external view of the hemostasis section 330 in the open state of FIG. 21. As shown in FIGS. 21 and 23, the first operation section 338 has a pressing cam 338A, a connecting section 338B, and an operation lever 338C. The pressing cam 338A is a so-called plate cam, and has a first cam surface 338D, a second cam surface 338E, and a third cam surface 338F. The distance from the rotation axis C1 of the pressing cam 338A increases in the order of the first cam surface 338D, the second cam surface 338E, and the third cam surface 338F. That is, the pressing cam 338A has an outer peripheral surface whose distance from the rotation axis C1 changes along the circumferential direction. The pressing cam 338A is disposed between a pair of flanges 333E. The rotation axis C1 of the pressing cam 338A is configured to be offset from the axis of the penetrating body 333A without intersecting with it.

[0071] The connecting portion 338B is connected to the pressing cam 338A, extends along the rotation axis C1, and passes through an insertion hole 322b (FIG. 19) of the first case portion 322. This allows the first operating portion 338 to be supported rotatably about the rotation axis C1 relative to the first case portion 322. The operating lever 338C is located outside the first case portion 322 and connected to the connecting portion 338B. The connecting portion 338B connects the pressing cam 338A and the operating lever 338C. The distance between the free end of the operating lever 338C and the rotation axis C1 is longer than the distance between the rotation axis C1 and the outer circumferential surface of the pressing cam 338A.

[0072] FIG. 24 is a partial cross-sectional external view of the hemostasis section 330 in the half-open state in the opening / closing device 301 shown in FIG. 18. FIG. 25 is a partial cross-sectional external view of the hemostasis section 330 in the open state in the opening / closing device 301 shown in FIG. 18. FIG. 26 is a cross-sectional view of the hemostasis section 330 in the open state and the fixing section 340 in the open state in the opening / closing device 301 shown in FIG. 18. In the hemostasis section 330 in the open state shown in FIGS. 21 and 23, the first pressing section 333 is located at the most proximal end side, and the first cam surface 338D of the pressing cam 338A abuts against the flange 333E on the tip side of the pressed section 333B. When the surgeon turns the operation lever 338C clockwise, the pressing cam 338A rotates and presses the flange 333E on the tip side toward the tip side, and the second cam surface 338E abuts against the flange 333E on the tip side as shown in FIG. 24. As a result, the first pressing portion 333 moves toward the tip side, and the tip of the penetrator 333A presses the plate-shaped portion 32B, slightly expanding the through holes 32d and 32e.

[0073] When the surgeon further turns the operation lever 338C clockwise, the pressing cam 338A rotates and presses the flange 333E on the tip side toward the tip side, and the third cam surface 338F abuts against the flange 333E on the tip side, as shown in Fig. 25. As a result, as shown in Fig. 26, the first pressing portion 333 moves further toward the tip side, and the tip of the penetrating body 333A further presses the plate-shaped portion 32B, widening the through holes 32d and 32e. When the surgeon turns the operation lever 338C counterclockwise, the first pressing portion 333 is pushed back toward the base end by the elastic force of the plate-shaped portion 32B and the protruding portion 32C, and the hemostatic valve 32 returns to the closed state.

[0074] Fig. 27 is a partial cross-sectional external view of the hemostasis part 330 when the pressing cam 338A is moving from the closed state of Fig. 23 to the half-open state of Fig. 24. In Fig. 27, a line segment connecting the rotation axis C1 of the pressing cam 338A and the abutment part 338G (boundary part between the first cam surface 338D and the second cam surface 338E) with respect to the flange part 333E on the tip side of the pressing cam 338A intersects with the axis of the penetrating body 333A. Therefore, a moment is generated in the pressing cam 338A by the elastic force of the plate-shaped part 32B and the protruding part 32C of the hemostasis valve 32. 23 to 25, when the first cam surface 338D, the second cam surface 338E, and the third cam surface 338F abut against the flange portion 333E on the tip side, the elastic force of the plate-shaped portion 32B and the protruding portion 32C of the hemostatic valve 32 is applied to the rotation axis C1 of the pressing cam 338A in a direction parallel to the axis of the penetrating body 333A, so that no moment is generated in the pressing cam 338A. Therefore, a clicking sensation can be generated when the surgeon rotates the pressing cam 338A.

[0075] 21, the fixed part 340 has a second holding part 41, a fixed valve 42, a second pressing part 343, a coil spring 44, and a second operating part 345. The second holding part 41 is fixed inside the case 321 so as to be immovable relative to the case 321. The fixed valve 42 is made of an elastic material such as silicone rubber, and is pressed into and held by the second holding part 41. In this embodiment, the fixed cylinder part 42C of the fixed valve 42 is tapered from the tip side toward the base end side.

[0076] FIG. 28 is a perspective view of the second pressing portion 343 shown in FIG. 21. The second pressing portion 343 is supported in the case 321 so as to be movable along the axial direction of the fixed valve 42 relative to the case 321. As shown in FIGS. 21 and 28, the second pressing portion 343 has a cylindrical pressing body 343A and a pressed portion 343B. The second pressing portion 343 is substantially cylindrical and has a fourth lumen 343c. The diameter of the fourth lumen 343c is smaller at the base end than at the tip end in the pressing body 343A, and is larger at the pressed portion 343B than the diameter of the pressing body 343A. The pressed portion 343B is connected to the base end of the pressing body 343A. The pressed portion 343B has a main body portion 343D and a pair of rectangular flange portions 343E provided at both ends of the axial direction of the second holding portion 41 relative to the main body portion 343D. The small diameter portion 36 of the first holding portion 31 is inserted into the pressed portion 343B, and the second pressing portion 343 is supported by the small diameter portion 36 so as to be capable of reciprocating along the axial direction. An O-ring 37 abuts against the inner circumferential surface of the pressed portion 343B.

[0077] FIG. 29 is a partial cross-sectional external view of the fixed part 340 in the open state of FIG. 21. As shown in FIGS. 21 and 29, the second operation part 345 has a pressing cam 345A, a connecting part 345B, and an operation lever 345C. The pressing cam 345A is a so-called plate cam, and has a first cam surface 345D, a second cam surface 345E, and a third cam surface 345F. The distance from the rotation axis C2 of the pressing cam 345A increases in the order of the first cam surface 345D, the second cam surface 345E, and the third cam surface 345F. That is, the pressing cam 345A has an outer peripheral surface whose distance from the rotation axis C2 changes along the circumferential direction. The pressing cam 345A is disposed between a pair of flanges 343E. The rotation axis C2 of the pressing cam 345A is configured to be offset from the axis of the pressing body 343A without intersecting with it.

[0078] The connecting portion 345B is connected to the pressing cam 345A, extends along the rotation axis C2, and penetrates the insertion hole 322a (FIG. 19) of the first case portion 322. This allows the second operating portion 345 to be supported rotatably around the rotation axis C2 relative to the first case portion 322. The operating lever 345C is located outside the first case portion 322 and connected to the connecting portion 345B. The connecting portion 345B connects the pressing cam 345A and the operating lever 345C. The coil spring 44 is interposed between the fixed valve 42 and the flange portion 343E on the tip side. The coil spring 44 constantly biases the second pressing portion 343 toward the base end side.

[0079] FIG. 30 is a partial cross-sectional external view of the fixed part 340 in the half-closed state in the opening / closing device 301 shown in FIG. 18. FIG. 31 is a partial cross-sectional external view of the fixed part 340 in the open state in the opening / closing device 301 shown in FIG. 18. FIG. 32 is a cross-sectional view of the hemostasis part 330 in the closed state and the fixed part 340 in the closed state in the opening / closing device 301 shown in FIG. 18. In the fixed part 340 in the open state shown in FIGS. 21 and 29, the first pressing part 343 is located at the most proximal end side, and the first cam surface 345D of the pressing cam 345A abuts against the flange part 343E on the tip side of the pressed part 343B. When the surgeon turns the operation lever 345C clockwise, the pressing cam 345A rotates and presses the flange part 343E on the tip side toward the tip side, and the second cam surface 345E abuts against the flange part 343E on the tip side as shown in FIG. 30. As a result, the first pressing portion 343 moves toward the tip side, the tip of the pressing body 343A enters the groove 42b of the fixed valve 42, the fixed cylinder portion 42C is pushed slightly inward, and the fixed valve 42 becomes half-closed.

[0080] When the surgeon further turns the operation lever 345C clockwise, the pressing cam 345A rotates and presses the flange 343E on the tip side toward the tip side, and the third cam surface 345F abuts against the flange 343E on the tip side, as shown in Fig. 31. As a result, as shown in Fig. 32, the first pressing portion 343 moves further toward the tip side, and the tip of the pressing body 343A penetrates deeply into the groove 42b of the fixed valve 42, the fixed cylinder portion 42C is pushed inward, the third lumen 42a is narrowed, and the fixed valve 42 is in a closed state. When the surgeon turns the operation lever 345C counterclockwise until the first cam surface 345 abuts against the flange 343E on the tip side, the second pressing portion 343 is pushed by the coil spring 44 and moves toward the base end, and the fixed valve 42 is in an open state.

[0081] Fig. 33 is a partial cross-sectional external view of the fixed part 340 when the pressing cam 345A is moving from the half-closed state of Fig. 30 to the closed state of Fig. 31. A line segment connecting the rotation axis C2 of the pressing cam 345A and the abutment part 345G (the boundary part between the second cam surface 345E and the third cam surface 345F) against the flange part 343E on the tip side of the pressing cam 345A intersects with the axis of the pressing body 343A. Therefore, a moment is generated in the pressing cam 345A by the elastic force of the fixed valve 42. 29 to 31, when the first cam surface 345D, the second cam surface 345E, and the third cam surface 345F contact the flange portion 343E on the tip side, the elastic force of the fixed valve 42 is applied to the rotation axis C2 of the pressing cam 345A in a direction parallel to the axis of the pressing body 343A, so that no moment is generated in the pressing cam 345A. Therefore, a clicking sensation can be generated when the surgeon rotates the pressing cam 345A.

[0082] The opening / closing device 301 is provided in the case 321, and further includes a first pressing part 333 having a tip-side flange 333E as a pressed part and a penetrating body 333A, and a first operating part 338 rotatably attached to the case 321. The first operating part 338 has a pressing cam 338A that abuts against the tip-side flange 333E and has an outer circumferential surface whose distance from the rotation axis C1 changes along the circumferential direction. The pressing cam 338A rotates by rotating the first operating part 338, and the outer circumferential surface presses the tip-side flange 333E to move the first pressing part 333, thereby moving the penetrating body 333A. With this configuration, the hemostasis valve 32 in a closed state can be easily opened by the first operating part 338 having the pressing cam 338A.

[0083] The distance between the free end of the operating lever 338C and the rotation axis C1 is longer than the distance between the rotation axis C1 and the outer circumferential surface of the pressing cam 338A, so that the penetrating body 333A can be moved with a small load by the principle of leverage.

[0084] <Fifth embodiment> Next, an opening and closing device for a medical valve according to a fifth embodiment of the present disclosure will be described with reference to the drawings. The same members as those in the opening and closing device 301 of the fourth embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0085] Fig. 34 is a perspective view of the second pressing portion 443 of this embodiment. Fig. 35 is a partial cross-sectional external view of the fixing portion 440 in the open state of this embodiment. As shown in Figs. 34 and 35, in the opening and closing device of this embodiment, the configurations of the second pressing portion 443 and the pressing cam 445A are different from the configurations of the second pressing portion 343 and the pressing cam 345A of the fourth embodiment.

[0086] The second pressing portion 443 has a configuration similar to that of the second pressing portion 343 of the fourth embodiment, and includes a cylindrical pressing body 443A and a pressed portion 443B. The second pressing portion 443 is substantially cylindrical and has a fourth lumen 443c. The pressed portion 443B has a main body 443D and a pair of rectangular flanges 443E provided at both ends of the axial direction of the fixed valve 42 relative to the main body 343D. A protruding portion 443F is provided on the base end side of the flange 443E on the tip side. The protruding portion 443F is provided at a position where a line segment connecting the rotation axis C3 of the pressing cam 445A described later and the protruding portion 443F is parallel to the axis of the fourth lumen 443c. A rectangular notch 443g is formed in the flange 443E on the base end side. The notch 443g is configured to be flush with the upper surface of the main body portion 443D.

[0087] The pressing cam 445A is a so-called plate cam, and first to sixth recesses 445b to 445g are formed along its outer circumference. The first to sixth recesses 445b to 445g are arranged in the order of increasing distance from the rotation axis C3 of the pressing cam 445A. That is, the pressing cam 445A has an outer circumferential surface whose distance from the rotation axis C3 changes along the circumferential direction. The pressing cam 445A is disposed between a pair of flanges 445E, and any one of the first to sixth recesses 445b to 445g engages with the convex portion 443F of the flange 443E on the tip side. The rotation axis C3 of the pressing cam 445A is configured to be offset from the axis of the pressing body 443A without intersecting therewith.

[0088] A protrusion 445H is provided on the upper surface of the pressing cam 445A. A plurality of recesses are formed on the inner surface of the upper side of the first case portion 322 along a circle whose center is the rotation axis C3 of the pressing cam 445A and whose radius is a line segment connecting the rotation axis C3 and the protrusion 445H. The plurality of recesses are formed at positions corresponding to the positions of the protrusion 445H when the first to sixth recesses 445b to 445g are engaged with the convex portion 443F.

[0089] FIG. 36 is a partial cross-sectional external view of the fixed part 440 in the half-closed state in this embodiment. FIG. 31 is a partial cross-sectional external view of the fixed part 440 in the open state in this embodiment. In the fixed part 440 in the open state shown in FIG. 35, the first recess 445b engages with the convex part 443F, and the first pressing part 443 is located at the most proximal end side. When the surgeon turns the operation lever 345C clockwise, the pressing cam 445A rotates, and the second and third recesses 445c and 445d engage with the convex part 443F in order while pressing the flange part 443E on the tip side to the tip side, and the fourth recess 445e engages with the convex part 443F as shown in FIG. 36. As a result, the first pressing part 443 moves to the tip side, the tip of the pressing body 443A enters the groove 42b of the fixed valve 42, the fixed cylinder part 42C is pushed slightly inward, and the fixed valve 42 is in the half-closed state.

[0090] When the operator further rotates the operation lever 345C clockwise, the pressing cam 445A rotates, and the fifth recess 445f engages with the convex portion 443F while pressing the flange portion 443E on the tip side further toward the tip side, and the sixth recess 445g engages with the convex portion 443F as shown in FIG. 37. As a result, the second pressing portion 443 moves further toward the tip side, and the tip of the pressing body 443A penetrates deeply into the groove 42b of the fixed valve 42, the fixed cylinder portion 42C is pushed inward, the third lumen 42a is narrowed, and the fixed valve 42 is in a closed state (see FIG. 32). When the operator rotates the operation lever 345C counterclockwise until the first recess 445b engages with the convex portion 443F, the second pressing portion 443 is pushed by the coil spring 44 and moves toward the base end side, and the fixed valve 42 is in an open state.

[0091] 36 and 37, when the pressing cam 445A rotates and the second pressing portion 443 moves to the tip side, the base end side portion of the pressing cam 445A is configured to protrude further to the base end side than the base end side flange 443E via the notch 443g of the base end side flange 443E. In this way, in the second pressing portion 443 of this embodiment, by forming the notch 443g in the base end side flange 443E, the longitudinal length of the second pressing portion 443 can be shortened, and therefore the longitudinal length of the opening and closing device can be shortened.

[0092] When the pressing cam 445A rotates, the protrusion 445H sequentially engages with a plurality of recesses (not shown) formed on the inner surface of the upper side of the first case part 322. Therefore, a clicking sensation can be generated when the surgeon rotates the pressing cam 445A.

[0093] According to the opening and closing device of this embodiment, it is possible to achieve the same effects as those of the opening and closing device 301 of the fourth embodiment.

[0094] The present disclosure is not limited to the configuration of the above-mentioned embodiment. The present invention as defined by the claims is not limited to the above-mentioned embodiment, and is intended to include all modifications within the meaning and scope equivalent to the claims. For example, the first pressing portion 333 of the fourth embodiment may be shaped similarly to the second pressing portion 443 of the fifth embodiment. That is, as shown in FIG. 38, a convex portion 333F may be provided on the base end side of the flange portion 333E on the tip side, and a rectangular notch 333g may be formed in the flange portion 333E on the base end side. Then, as shown in FIG. 39, in the hemostasis portion 330, instead of the pressing cam 338A, a pressing cam 438A having the same shape as the pressing cam 445A may be used to open and close the hemostasis valve 32. [Explanation of symbols]

[0095] 1, 101, 201, 301: Switchgear 21, 321: Case 31: 1st holding part 32: Hemostasis valve 32A: Base 32B: Plate-shaped part 32C:Protrusion 32e: Through hole 33A, 251: Penetrator 234:Operation unit 234E: Slanted side 250: Third pressing part 255: Pressed part 333: First pressing part 333A: Penetrator 333E:Tsubabe 338: 1st operation section 338A, 438A: Pressure cam 338C: Operating lever C1: Rotation axis

Claims

1. Case and A holding portion provided in the case; A medical valve that is held by the holding portion, is normally in a closed state, and is made of an elastic material, A cylindrical base; a plate-shaped portion provided inside an end portion of the one end of the base portion so as to close an opening of the one end of the base portion, the plate-shaped portion having a through hole formed in a center portion; a protruding portion having a cylindrical shape and protruding from a center portion of the plate-shaped portion toward an opposite side to the other end side of the base portion, The protruding portion is formed with a shaft hole that is in a closed state due to an elastic force when no pressing force is applied, and is configured so that the diameter of the shaft hole is expanded when a pressing force is applied to the protruding portion, The medical valve, wherein the protrusion has a radial thickness that is thicker on the opposite side to the plate-shaped portion side than on the plate-shaped portion side, and the outer diameter of the protrusion is smaller than the inner diameter of the base portion; a penetrating body that is cylindrical, supported on the case so as to be movable along the axial direction of the base, and that can press the plate-shaped portion to expand the axial hole of the protrusion.

2. a pressing part provided in the case and having a pressed part and the penetrating body; an operating unit supported on the case so as to be movable along a direction perpendicular to the axial direction of the base, the operating unit having an inclined portion inclined with respect to the axial direction of the base, 2. The opening and closing device of a medical valve according to claim 1, wherein the inclined portion presses the pressed portion to move the pressing portion by moving the operating portion along a direction perpendicular to the axial direction of the base, thereby moving the penetrating body.

3. a pressing part provided in the case and having a pressed part and the penetrating body; An operating unit rotatably attached to the case, the operating portion includes a cam having an outer circumferential surface that comes into contact with the pressed portion and whose distance from a rotation axis changes along a circumferential direction, 2. The opening and closing device of a medical valve according to claim 1, wherein the cam rotates by rotating the operating portion, and the outer circumferential surface presses the pressed portion to move the pressing portion, thereby moving the penetrating body.

4. 4. The opening and closing device of a medical valve according to claim 3, wherein the operating unit has an operating lever connected to the cam, and a distance between a free end of the operating lever and the rotation shaft is longer than a distance between the rotation shaft and the outer circumferential surface of the cam.

5. A medical valve which is normally in a closed state and which is made of an elastic material, comprising: a cylindrical base; a plate-like portion which is provided on the inside of an end portion of one end of the base so as to close an opening at one end of the base and has a through hole formed in its center; and a cylindrical protrusion which protrudes from the center of the plate-like portion to the side opposite the other end of the base, wherein an axial hole is formed in the protrusion which is in a closed state due to an elastic force when no pressing force is applied, and wherein a pressing force is applied to the protrusion to expand the diameter of the axial hole, A portion corresponding to the protrusion is fabricated so as to protrude from a center portion of the plate-like portion toward the base side together with the base portion and the plate-like portion; The portion corresponding to the protruding portion is protruding in an inverted manner toward the opposite side to the base side to form the protruding portion; a radial thickness of the protrusion is greater on the opposite side to the plate-shaped portion than on the plate-shaped portion side, and an outer diameter of the protrusion is smaller than an inner diameter of the base.

Images