JP7690359B2 - Hemostasis valve opening/closing mechanism and medical connector - Google Patents

Description

The technology disclosed in this specification relates to a mechanism for opening and closing a hemostasis valve, a fixing mechanism for a long medical device, and a medical connector.

The Y connector is a medical connector that is connected to a guiding catheter. The Y connector has a main tube and a branch tube that branches off from the main tube. A long medical device such as a guidewire or catheter is introduced into the guiding catheter via the main tube, and a liquid such as a contrast agent or saline is supplied via the branch tube. The Y connector is provided with an opening/closing mechanism for opening and closing a hemostatic valve that prevents blood from flowing out through the lumen of the main tube, and a fixing mechanism for fixing the long medical device.

In the opening and closing mechanism of the hemostasis valve in a conventional Y-connector, a penetrating member (opener) is provided with a through hole formed coaxially with the lumen of the main pipe, and by pressing the penetrating member in a direction parallel to the axial direction of the lumen of the main pipe, the penetrating member presses the hemostasis valve to switch between an open state in which the hemostasis valve is opened and a closed state in which the penetrating member moves away from the hemostasis valve to close (see, for example, Patent Document 1). At this time, the so-called double knock mechanism having a rotating cam keeps the hemostasis valve in the open or closed state even after the pressure on the penetrating member by the operator is released. Furthermore, in the fixing mechanism for long medical devices in conventional Y-connectors, an elastic fixed valve is provided with a through hole through which the long medical device is inserted. By rotating the screw to move it in the axial direction, which in turn moves the pusher in the axial direction, the fixed valve is pressed by the pusher and elastically deformed, reducing the inner diameter of the through hole of the fixed valve to fix the long medical device, and switching between a fixed state in which the fixed valve is not pressed by the pusher, the inner diameter of the through hole of the fixed valve expands, and the fixation of the long medical device is released (see, for example, Patent Document 1).

Patent No. 5249049

In the above-mentioned conventional Y-connector configuration, a rotating cam formed around the entire circumference of the cam mechanism is used to maintain the open or closed state of the hemostatic valve, so that a biasing member for biasing the penetrating member toward the base end must be installed between the hemostatic valve and the penetrating member to avoid interference with the cam mechanism, resulting in a problem that the overall length of the device is large. Therefore, a new design is required for the hemostatic valve opening and closing mechanism. In addition, in the above-mentioned conventional Y-connector configuration, the operation of fixing/unfixing the long medical device is performed by rotating a screw, which is cumbersome, and there is a problem that the degree of fixation of the long medical device cannot be grasped by touch or visually. Note that such a problem is not limited to Y-connectors, but is a common problem with medical connectors equipped with a hemostatic valve opening and closing mechanism and/or a fixing mechanism for a long medical device.

This specification discloses a technology that can solve the above-mentioned problems.

The technology disclosed in this specification can be realized, for example, in the following forms:

(1) The opening and closing mechanism of the hemostatic valve disclosed in the present specification comprises a housing, a hemostatic valve, a penetrating member, a ring pin, and a biasing member. The housing is a tubular member having a lumen formed therein that communicates with a tip opening and a base opening. The hemostatic valve is attached within the housing and is normally in a closed state. When pressed from the base end side, the hemostatic valve is in an open state in which a through hole communicating with the tip opening of the housing is formed. The penetrating member is a member having a through hole formed therein, and is housed within the housing on the base end side of the hemostatic valve so as to be slidable along a first direction that is the extension direction of the lumen. The penetrating member can be located at a first position that closes the hemostatic valve and a second position displaced from the first position to the tip side along the first direction. The second position is a position in which the hemostatic valve is pressed to open the hemostatic valve and communicate the through hole of the hemostatic valve with the through hole of the penetrating member. The ring pin has a ring-shaped main body portion surrounding the outer circumferential surface of the penetrating member, and a pin portion protruding radially inward from the main body portion. The ring pin is accommodated in the housing in a state in which movement in the first direction is restricted on the base end side of the hemostatic valve, and rotation around the first direction is permitted. A biasing member biases the penetrating member toward the base end side. A motion restricting groove that is connected in one circumference is formed on the surface of the penetrating member, and the pin portion of the ring pin is loosely fitted into the motion restricting groove. The motion restricting groove is formed with a closed position portion, a first apex portion, an open holding portion, and a second apex portion. The closed position portion is a portion into which the pin portion fits without restricting movement of the penetrating member toward the tip side when the penetrating member is in a first state in the first position. The first apex is a portion into which the pin fits without restricting movement of the penetrating member toward the base end side when the penetrating member reaches a second state from the first state to a position more distal than the second position. The open retaining portion is a portion into which the pin fits so as to restrict movement of the penetrating member toward the base end side when the penetrating member is displaced from the second state to the second position by the biasing force of the biasing member in a third state. The second apex is a portion into which the pin fits without restricting movement of the penetrating member toward the base end side when the penetrating member reaches a fourth state from the third state to a position more distal than the second position.

In this manner, in this opening/closing mechanism, when the penetrating member is in the first position and the hemostatic valve is in the closed state, if the penetrating member receives a pressing force and slides in the first direction toward the inside of the housing, the penetrating member moves from the second position to a position toward the distal end, and as a result, the pin portion of the ring pin reaches the first apex, which is a portion of the movement restricting groove that fits without restricting the movement of the penetrating member toward the proximal end. When the pressing force on the penetrating member is then released, the penetrating member moves toward the proximal end to the second position by the biasing force of the biasing member, and the hemostatic valve switches from the open state to the closed state. At this time, the pin portion of the ring pin moves from the first apex of the movement restricting groove to the open retaining portion, restricting the movement of the penetrating member toward the proximal end and maintaining the penetrating member in the second position, thereby maintaining the open state of the hemostatic valve. Furthermore, when the penetrating member is pressed again and slides inwardly of the housing in the first direction, the penetrating member moves from the second position to a position toward the distal end, and as a result, the pin portion of the ring pin reaches the second apex, which is a portion of the movement restriction groove that fits without restricting the movement of the penetrating member toward the proximal end. When the pressing force on the penetrating member is then released, the penetrating member moves toward the proximal end to the first position due to the biasing force of the biasing member, and the hemostatic valve switches from an open state to a closed state. Therefore, according to this opening/closing mechanism, the open/closed state of the hemostatic valve can be switched and maintained each time the operator presses the penetrating member, improving the operability of the opening/closing mechanism.

(2) In the above-mentioned hemostasis valve opening/closing mechanism, a hollow annular accommodating hole extending in the first direction is formed on the outer circumferential side of the through hole in the penetrating member, a slit extending in the first direction and communicating with the accommodating hole is formed on the outer circumferential surface of the penetrating member, the biasing member is tubular and accommodated in the accommodating hole of the penetrating member, and a convex portion protruding radially inward is formed on the inner circumferential surface of the housing and inserted into the slit of the penetrating member to restrict movement of the biasing member toward the tip side. According to this hemostasis valve opening/closing mechanism, the biasing member can be disposed in the penetrating member, and the overall length of the device can be shortened compared to a configuration in which the biasing member is disposed between the hemostasis valve and the penetrating member.

(3) The fixing mechanism for the long medical device disclosed in this specification includes a circular tubular body, a shaft member, at least two valve levers, an elastic body, and a power imparting member. The circular tubular body is a flexible circular tubular member having a through hole formed therein through which the long medical device is inserted. The circular tubular body is a tubular member having a shaft member and a lumen formed therein for accommodating the circular tubular body. The shaft member is formed with at least two slit holes communicating the lumen with the outer circumferential surface, and a support portion provided for each slit hole. Each valve lever is supported by the support portion on the outer circumferential side of the shaft member so as to be rotatable about the support portion as a fulcrum. Each valve lever has a lever portion protruding to the outer circumferential side, and a claw portion provided at a position capable of interfering with the circular tubular body through the slit hole of the shaft member as the valve lever rotates, and is formed with a recess. An elastic body is arranged to surround the shaft member and engages with the recess of each valve lever under tension. The power imparting member is a member that slides in a first direction, which is the axial direction of the tubular body, at a position where it interferes with the lever portion of each of the valve levers. This fixing mechanism is configured so that, as the power imparting member slides from the first position to the second position, the lever portion of each of the valve levers is pressed, causing the valve lever to rotate and enter a first state in which the claw portion is separated from the tubular body, and as the power imparting member slides from the second position to the first position, the lever portion of each of the valve levers is pressed, causing the valve lever to rotate and enter a second state in which the claw portion interferes with the tubular body and the inner diameter of the through hole of the tubular body is deformed to be smaller.

In this manner, in the fixing mechanism, by sliding the power applying member from the second position to the first position along the first direction, which is the extension direction of the circular tubular body, each valve lever can be switched from a first state in which it does not interfere with the circular tubular body to a second state in which it interferes with the circular tubular body, and the valve levers are pressed against the claws of each valve lever to reduce the inner diameter of the through hole of the circular tubular body, thereby fixing the long medical device. At this time, the tension of the elastic body holds each valve lever in the second state, thereby maintaining the fixed state of the long medical device. Also, by sliding the power applying member from the first position to the second position along the first direction, each valve lever can be switched from the second state to the first state, thereby releasing the interference of the claws of each valve lever with the circular tubular body and releasing the fixed state of the long medical device. At this time, the tension of the elastic body holds each valve lever in the first state, thereby maintaining the released state of the long medical device. Therefore, with this fixing mechanism, it is possible to fix and release a long medical device by sliding a power imparting member, which is an easier operation than the conventional operation of rotating a screw, and the degree of fixation of the long medical device can be grasped by touch and sight, improving the operability of the fixing mechanism.

(4) The fixing mechanism for the long medical device may include a plurality of sets of two valve levers facing each other across the tubular body, and the positions of the claw portions of each set of valve levers in the second state may be different from each other along the first direction. According to this fixing mechanism for the long medical device, the claw portions of the plurality of valve lever sets can fix the long medical device at a plurality of positions along the first direction on the tubular body, thereby improving the reliability of fixing the long medical device.

The technology disclosed in this specification can be realized in various forms, for example, a hemostatic valve opening/closing mechanism, a fixing mechanism for a long medical device, a medical connector equipped with a hemostatic valve opening/closing mechanism and/or a fixing mechanism for a long medical device, a medical device equipped with a medical connector, etc.

FIG. 1 is an explanatory diagram showing the configuration of a medical connector according to an embodiment of the present invention; FIG. 2 is an explanatory diagram showing the configuration of the opening and closing mechanism of the hemostasis valve of the medical connector shown in FIG. FIG. 3 is an explanatory diagram showing the configuration of the opening/closing mechanism shown in FIG. FIG. 1 is an explanatory diagram showing the configuration of an opening/closing mechanism. FIG. 1 is an explanatory diagram showing the configuration of an opening/closing mechanism. FIG. 13 is a perspective view showing the external configuration of a base end portion of a housing of the opening/closing mechanism and a ring pin; FIG. 2 is a perspective view showing the external configuration of a distal end portion of the housing and a hemostasis valve; FIG. 13 is a perspective view showing an external configuration of a penetrating member in the opening and closing mechanism; FIG. 2 is a perspective view showing an external configuration of a penetrating member; FIG. 13 is an explanatory diagram showing the position of the pin portion of the ring pin in the movement restriction groove of the penetrating member; FIG. 13 is an explanatory diagram showing the position of the pin portion of the ring pin in the movement restriction groove of the penetrating member; FIG. 1 is an explanatory diagram showing a configuration of a fixing mechanism in the present embodiment. FIG. 13 is an explanatory diagram showing the configuration of the fixing mechanism shown in FIG. FIG. 1 is an explanatory diagram showing a configuration of a fixing mechanism. FIG. 1 is an explanatory diagram showing a configuration of a fixing mechanism. FIG. 1 is an explanatory diagram showing a configuration of a fixing mechanism. FIG. 1 is an explanatory diagram showing a configuration of a fixing mechanism. FIG. 13 is a perspective view showing the external configuration of a shaft member of the fixing mechanism; FIG. 1 is a perspective view showing the external configuration of a cylindrical body of a fixing mechanism; FIG. 13 is a perspective view showing the external configuration of a valve lever of the fixing mechanism;

A. Embodiments:
A-1. Configuration of medical connector:
FIG. 1 is an explanatory diagram showing the configuration of the medical connector in this embodiment. FIG. 1 shows the configuration of a longitudinal section (YZ section) of the medical connector 10. The medical connector 10 of this embodiment is a Y connector that is connected to a guiding catheter GC via a rotator 20 and used. In this specification, in the medical connector 10, the side to which the guiding catheter GC is connected (Z-axis positive direction side) is referred to as the tip side, and the opposite side (Z-axis negative direction side) is referred to as the base side. In addition, for the medical connector 10 and each of its components, the tip side end is referred to as the "tip", the tip and its vicinity are referred to as the "tip part", the base side end is referred to as the "base end", and the base end and its vicinity are referred to as the "base end part". In addition, for convenience of explanation, the Z-axis direction is referred to as the front-back direction, the Y-axis direction is referred to as the up-down direction, the Y-axis positive direction is referred to as the up direction, the Y-axis negative direction is referred to as the down direction, and the X-axis direction is referred to as the left-right direction. However, the posture of the medical connector 10 is not limited to this.

The medical connector 10 has a tubular main pipe 11 extending in the front-rear direction, and a tubular branch pipe 12 branching from near the tip and extending obliquely upward toward the base end. A lumen 13 is formed in the main pipe 11, extending in the front-rear direction and penetrating the main pipe 11, and a long medical device (not shown), such as a guidewire or catheter, is introduced into the guiding catheter GC via the lumen 13. A lumen 14 is formed in the branch pipe 12, communicating with the lumen 13, and a liquid, such as a contrast medium or saline solution, is supplied via the lumen 14 from a liquid supply device (not shown) connected to the end of the branch pipe 12.

The medical connector 10 comprises an opening/closing mechanism 100 for a hemostasis valve and a fixing mechanism 200 for a long medical device. The opening/closing mechanism 100 is provided on the base end side of the fixing mechanism 200. The portion of the medical connector 10 on the tip side of the fixing mechanism 200 is composed of a joint member 300 that functions as the tip of the main pipe section 11 and the branch pipe section 12. Below, the configurations of the opening/closing mechanism 100 and the fixing mechanism 200 will be described in this order.

The medical connector 10 is used by being held by a technician such as a doctor. For example, the technician grasps the main pipe 11 of the medical connector 10 in the position shown in FIG. 1 with four fingers from the index finger to the little finger covering the main pipe 11 from above, and holds the medical connector 10 so that the thumb is positioned near the base end of the penetrating member 140 of the opening/closing mechanism 100 or the base end of the power imparting member 270 of the fixing mechanism 200.

A-2. Configuration of the hemostasis valve opening/closing mechanism 100:
Next, the configuration of the opening/closing mechanism 100 of the hemostasis valve will be described. Figures 2 to 5 are explanatory diagrams showing the configuration of the opening/closing mechanism 100 in this embodiment. Figures 2 and 3 show its longitudinal section (YZ section), and Figures 4 and 5 show its external perspective view. Figures 2 and 4 show the opening/closing mechanism 100 in a state in which the hemostasis valve 120 is closed (hereinafter referred to as "closed state opening/closing mechanism 100c"), and Figures 3 and 5 show the opening/closing mechanism 100 in a state in which the hemostasis valve 120 is open (hereinafter referred to as "open state opening/closing mechanism 100o").

The opening/closing mechanism 100 is a mechanism for opening and closing the hemostatic valve 120 that suppresses the outflow of blood through the lumen 13 (FIG. 1). The opening/closing mechanism 100 of this embodiment is a mechanism that switches between a state in which the hemostatic valve 120 is closed and a state in which the hemostatic valve 120 is open each time the operator applies pressure to the penetrating member 140. The opening/closing mechanism 100 includes a housing 110, a hemostatic valve 120, a penetrating member 140, a ring pin 160, and a biasing member 106.

2 and 3, the housing 110 is a tubular member in which a tip end opening 112 and a base end opening 111 are formed, and a lumen 113 is formed that communicates with them. The lumen 113 formed in the housing 110 is a through hole that extends in the front-rear direction (Z-axis direction) and constitutes a part of the lumen 13 of the main pipe portion 11 of the medical connector 10. The housing 110 is formed, for example, from a resin. Note that the housing 110 is not shown in FIGS. 4 and 5. The Z-axis direction is an example of the first direction in the claims.

In this embodiment, the housing 110 has three sections aligned in the front-rear direction, namely, a distal section 110D, an intermediate section 110M, and a proximal section 110P. Each of these sections is a tubular member having a lumen extending in the front-rear direction. The proximal end of the intermediate section 110M is inserted and fixed into the lumen at the distal end of the base section 110P, and the proximal end of the distal section 110D is inserted and fixed into the lumen at the distal end of the intermediate section 110M, so that the proximal section 110P, the intermediate section 110M, and the distal section 110D are integrated to form the housing 110.

Figure 6 is a perspective view showing the external configuration of the base end portion 110P of the housing 110 and the ring pin 160. As shown in Figures 2, 3 and 6, a flange portion 115 that protrudes in the outer circumferential direction is formed at the base end of the base end portion 110P of the housing 110. In addition, a convex portion 114 that protrudes radially inward is formed on the inner circumferential surface of the base end portion 110P approximately in the center in the front-to-rear direction. In this embodiment, two convex portions 114 that face each other in the radial direction are formed on the base end portion 110P.

Figure 7 is a perspective view showing the external configuration of the distal end portion 110D of the housing 110 and the hemostatic valve 120. As shown in Figures 2, 3, and 7, a first wall portion 116 is formed at the distal end of the distal end portion 110D, extending from the outer circumferential surface toward the radial center. The shape of the first wall portion 116 when viewed in the Z-axis direction is a circular ring shape with a hole that forms the lumen 113. In addition, a second wall portion 117 is further formed at the distal end of the distal end portion 110D, extending from the distal end of the first wall portion 116 toward the base end side. The second wall portion 117 is approximately cylindrical and extends in the front-rear direction. Due to the presence of the first wall portion 116 and the second wall portion 117, a substantially hollow cylindrical storage space 118 is formed at the distal end of the distal end portion 110D.

2 to 5 and 7, the hemostatic valve 120 is a member having a substantially disk-shaped main body 127 and a substantially cylindrical protrusion 128 protruding from the outer periphery toward the tip side, and is formed of an elastic material such as silicone rubber. The hemostatic valve 120 is accommodated inside the tip of the housing 110. More specifically, the protrusion 128 is inserted into the accommodation space 118 formed in the tip side portion 110D of the housing 110, thereby fixing the hemostatic valve 120 to the housing 110. A slit 121 is formed at a substantially central position in the main body 127 as viewed in the Z-axis direction (FIG. 4). The hemostatic valve 120 is normally in a closed state in which the slit 121 is closed and the valve is closed (FIGS. 2 and 4). When the hemostatic valve 120 is in a closed state, the lumen 113 is closed by the hemostatic valve 120, and blood outflow from the hemostatic valve 120 to the base end side through the lumen 113 is suppressed. When the hemostatic valve 120 is pressed from the base end side, each piece separated by the slit 121 is elastically deformed so as to be displaced toward the tip end side, and the valve is in an open state in which a through hole 122 is formed that penetrates the hemostatic valve 120 in the front-rear direction (FIGS. 3 and 5). In the open state, the through hole 122 communicates with the tip opening 112 via the lumen 113. Therefore, when the hemostatic valve 120 is in the open state, the lumen 113 is not closed at the position of the hemostatic valve 120 and is in an open state. When the pressing force from the base end side is removed, the hemostatic valve 120 is elastically deformed and returns to the closed state.

8 and 9 are perspective views showing the external configuration of the penetrating member 140 in this embodiment. In this embodiment, the penetrating member 140 has three parts aligned in the front-rear direction, namely, a tip part 140D, a middle part 140M, and a base part 140P. Note that in FIG. 9, the middle part 140M is omitted in order to show the internal configuration of the penetrating member 140. The tip part 140D, the middle part 140M, and the base part 140P are joined together to form the penetrating member 140 as a whole. The penetrating member 140 is a member in which a through hole 142 extending in the front-rear direction is formed, and is made of, for example, resin.

A flange portion 145 that protrudes in the outer circumferential direction is formed at the base end of the base end side portion 140P of the penetrating member 140. The tip portion 144 of the tip side portion 140D has a smaller diameter than the other portions. A hollow annular accommodation hole 147 extending in the front-rear direction is formed on the outer circumferential side of the through hole 142 in the intermediate portion 140M and the base end side portion 140P. The base end of the accommodation hole 147 extends to the base end of the base end side portion 140P, and the tip of the accommodation hole 147 extends to the vicinity of the tip of the intermediate portion 140M. In addition, a slit 148 extending in the front-rear direction is formed on the outer circumferential surface of the penetrating member 140. In this embodiment, two slits 148 that face each other in the radial direction are formed on the outer circumferential surface of the penetrating member 140. The tip of each slit 148 is open, and the base end of the slit 148 reaches the vicinity of the tip of the base end side portion 140P. Each slit 148 is connected to a receiving hole 147. In addition, a movement restriction groove 40 is formed on the outer peripheral surface of the middle portion 140M of the penetrating member 140. The movement restriction groove 40 is a so-called heart cam groove, and is a groove that is connected in a heart shape in one revolution. As shown in Figures 2 and 3, a flat ring member 102 that is approximately C-shaped when viewed in the front-rear direction is attached to the outer periphery of the tip portion 144.

2 and 3, the penetrating member 140 is housed inside the housing 110 on the base end side of the hemostatic valve 120. In the penetrating member 140 housed in the housing 110, the through hole 142 communicates with the lumen 113 of the housing 110. The through hole 142 of the penetrating member 140 and the lumen 113 of the housing 110 are coaxial with each other. The base end of the base end portion 140P of the penetrating member 140 is exposed from the housing 110, allowing a pressing operation by a technician such as a doctor.

The penetrating member 140 is slidable in the front-rear direction with its vertical and horizontal positions determined relative to the housing 110. The penetrating member 140 is positioned so that the through hole 142 faces the slit 121 of the hemostatic valve 120 in the front-rear direction. The penetrating member 140, which is slidable in the front-rear direction, can be positioned at a pressing position P2 (FIGS. 3 and 5) in which the tip 144 presses the hemostatic valve 120 to open the hemostatic valve 120, and at a non-pressing position P1 (FIGS. 2 and 4) in which the hemostatic valve 120 is not pressed and the hemostatic valve 120 is closed. In this embodiment, the penetrating member 140 positioned at the non-pressing position P1 is separated from the hemostatic valve 120 on the base end side, but the penetrating member 140 may be positioned so as to contact the hemostatic valve 120 to restrict the slit 121 from deforming in the rear direction. As shown in Figures 3 and 5, when the penetrating member 140 is in the pressing position P2, the through hole 122 and the through hole 142 communicate with each other. The pressing position P2 is an example of the second position in the claims, and the non-pressing position P1 is an example of the first position in the claims.

The biasing member 106 is, for example, a substantially cylindrical spring. The spring is made of, for example, a metal such as stainless steel. As shown in Figs. 2 and 3, the biasing member 106 is accommodated in a hollow annular accommodation hole 147 formed in the penetrating member 140. The accommodation hole 147 is blocked by a cover member 108 attached to the base end side of the penetrating member 140. The base end of the biasing member 106 accommodated in the accommodation hole 147 abuts against the tip side surface of the cover member 108. In addition, the tip of the biasing member 106 abuts against the convex portion 114 of the housing 110. Therefore, the biasing member 106 biases the penetrating member 140 toward the base end side with respect to the housing 110. When the biased penetrating member 140 is not subjected to a pressing operation by the operator, it is located in a non-pressing position P1 (Figs. 2 and 4) where it does not press the hemostasis valve 120.

2 to 6, the ring pin 160 is a member having a ring-shaped main body 161 and a pin portion 162 protruding radially inward from the main body 161, and is formed of, for example, resin. The main body 161 is arranged to surround the outer circumferential surface of the penetrating member 140, and is fitted into the penetrating member 140 so that the spring property of the main body 161 presses the pin portion 162 against the movement restriction groove 40 formed on the surface of the penetrating member 140. The pin portion 162 is loosely fitted into the movement restriction groove 40. As shown in FIGS. 2 and 3, the ring pin 160 is accommodated at a position on the base side of the hemostasis valve 120. The ring pin 160 is sandwiched between the base side surface of the intermediate portion 110M and the tip side surface of the base side portion 110P in the housing 110, so that the movement in the front-rear direction is restricted. On the other hand, the ring pin 160 is allowed to rotate around the Z axis.

The position of the pin portion 162 in the movement restriction groove 40 changes as the penetrating member 140 slides forward and backward (Z-axis direction). Figures 10 and 11 are explanatory diagrams showing the position of the pin portion 162 in the movement restriction groove 40 in this embodiment. Figures 10 and 11 show the planar configuration of the penetrating member 140, the ring pin 160, and the hemostatic valve 120. Figure 10 shows a closed state opening and closing mechanism 100c in which the penetrating member 140 is in the non-pressed position P1 and the hemostatic valve 120 is closed, and Figure 11 shows an open state opening and closing mechanism 100o in which the penetrating member 140 is in the pressed position P2 and a through hole 122 is formed in the hemostatic valve 120.

10 and 11, as the penetrating member 140 slides in the front-rear direction (Z-axis direction), the pin portion 162 moves relatively in one direction (counterclockwise in the illustrated example) within the movement restriction groove 40 while rotating and swinging around the Z-axis. That is, as shown in FIG. 10, in the first state in which the penetrating member 140 is in the non-pressing position P1, the pin portion 162 is located at the bottom of the heart shape of the movement restriction groove 40 (hereinafter referred to as the "closed position portion 40A"). In this state, the movement of the penetrating member 140 toward the tip side is not restricted by the pin portion 162. When the penetrating member 140 moves from the first state toward the tip side (positive direction of the Z-axis), the pin portion 162 moves relatively toward the base end side within the movement restriction groove 40. In a second state in which the penetrating member 140 is displaced from the non-pressing position P1 to the pressing position P2 and further reaches a position on the tip side of the pressing position P2, the pin portion 162 is located at one of a pair of apexes (hereinafter referred to as the "first apex 40B") that sandwich the heart-shaped valley portion of the movement restricting groove 40. In this state, the movement of the penetrating member 140 toward the base end side is not restricted by the pin portion 162. In a third state in which the penetrating member 140 moves from the second state to the pressing position P2 so as to return slightly to the base end side, as shown in FIG. 11, the pin portion 162 moves relatively toward the tip side within the movement restricting groove 40 and reaches the heart-shaped valley portion of the movement restricting groove 40 (hereinafter referred to as the "open holding portion 40C"). In this state, the movement of the penetrating member 140 toward the base end side is restricted by the interference between the pin portion 162 and the movement restricting groove 40, and the penetrating member 140 is maintained at the pressing position P2. In a fourth state in which the penetrating member 140 moves slightly toward the tip from the third state to a position further toward the tip than the pressing position P2, the pin portion 162 moves relatively toward the base end within the movement restricting groove 40 and is located at the other of a pair of apexes (hereinafter referred to as the "second apex 40D") that sandwich the heart-shaped valley in the movement restricting groove 40. In this state, the movement of the penetrating member 140 toward the base end is not restricted by the pin portion 162. When the penetrating member 140 moves toward the base end from the fourth state to the non-pressing position P1, the pin portion 162 moves relatively toward the tip within the movement restricting groove 40 and returns to the closed position portion 40A in the movement restricting groove 40 (FIG. 10). In this embodiment, a depth-wise step is provided at the boundary between each part of the movement restriction groove 40 (closed position part 40A, first apex part 40B, open holding part 40C, and second apex part 40D), preventing the pin part 162 from moving backwards within the movement restriction groove 40.

A-3. Operation of the opening and closing mechanism 100 of the hemostasis valve 120:
Next, the operation of the opening/closing mechanism 100 will be described. In the initial state, as shown in Fig. 2 and Fig. 4, the penetrating member 140 is in a non-pressing position P1 where it does not press the hemostasis valve 120 by receiving the biasing force of the biasing member 106. In this state, the hemostasis valve 120 is closed, and the opening/closing mechanism 100 becomes a closed-state opening/closing mechanism 100c. At this time, as shown in Fig. 10, the pin portion 162 is in the closed position portion 40A of the operation restriction groove 40.

For example, when a valve opening operation is performed by pressing the flange portion 145 toward the inside of the housing 110 with the thumb of the operator holding the medical connector 10, the penetrating member 140 slides from the non-pressing position P1 toward the tip side against the biasing force of the biasing member 106. As a result, the pin portion 162 moves relatively toward the base end side within the operation restriction groove 40. When the penetrating member 140 moves toward the tip side by more than a certain distance, the tip portion 144 of the penetrating member 140 presses the hemostatic valve 120 to open the hemostatic valve 120. When the valve opening operation by the operator is released after the penetrating member 140 reaches a position distal to the pressing position P2 and the pin portion 162 reaches the first apex 40B of the movement restriction groove 40, as shown in FIG. 11, the penetrating member 140 returns slightly to the base end side due to the biasing force of the biasing member 106, and the pin portion 162 moves relatively to the tip side within the movement restriction groove 40 to reach the open holding portion 40C. In this state, the penetrating member 140 is maintained in the pressing position P2 because the movement of the penetrating member 140 toward the base end side is restricted by the interference between the pin portion 162 and the movement restriction groove 40. As a result, the opening/closing mechanism 100 becomes the open state opening/closing mechanism 100o shown in FIG. 3 and FIG. 5.

When the opening/closing mechanism 100 is in the open state opening/closing mechanism 100o, for example, when the operator's thumb is used to perform a valve closing operation by pressing the flange portion 145 toward the inside of the housing 110, similar to the valve opening operation, the penetrating member 140 slides from the pressing position P2 toward the tip side against the biasing force of the biasing member 106. Accordingly, the pin portion 162 moves relatively from the open holding portion 40C in the operation restriction groove 40 toward the base end side to reach the second apex 40D. In this state, the movement of the penetrating member 140 toward the base end side is not restricted by the pin portion 162. Therefore, when the operator releases the valve closing operation, the penetrating member 140 moves toward the base end side due to the biasing force of the biasing member 106 and returns to the non-pressing position P1. Accordingly, as shown in FIG. 10, the pin portion 162 moves relatively toward the tip side within the operation restriction groove 40 to return to the closed position portion 40A. As a result, the hemostasis valve 120 is closed, and the opening/closing mechanism 100 becomes the closed-state opening/closing mechanism 100c shown in Figures 2 and 4.

In this way, each time the pressing operation (valve opening operation and valve closing operation) is performed on the penetrating member 140, the opening/closing mechanism 100 switches between the closed state opening/closing mechanism 100c and the open state opening/closing mechanism 100o.

A-4. Technical effects of the opening and closing mechanism 100 of the hemostasis valve 120:
As described above, in the opening/closing mechanism 100, when the penetrating member 140 is located at the non-pressed position P1 and the hemostatic valve 120 is in the closed state, if the penetrating member 140 receives a pressing force and slides inward in the front-rear direction of the housing 110, the penetrating member 140 moves to a position distal to the pressing position P2, and as a result, the pin portion 162 reaches the first apex 40B, which is a portion of the operation restricting groove 40 that fits in the operation restricting groove 40 without restricting the movement of the penetrating member 140 toward the base end. After that, when the pressing force on the penetrating member 140 is released, the penetrating member 140 moves to the base end side to the pressing position P2 due to the biasing force of the biasing member 106, and the hemostatic valve 120 switches from the open state to the closed state. At this time, the pin portion 162 moves from the first apex 40B to the open holding portion 40C of the operation restricting groove 40, restricting the movement of the penetrating member 140 toward the base end side and maintaining the penetrating member 140 at the pressing position P2, thereby maintaining the open state of the hemostatic valve 120. When the penetrating member 140 receives the pressing force again and slides toward the inside of the housing 110 in the front-rear direction, the penetrating member 140 moves to a position toward the tip side from the pressing position P2, and as a result, the pin portion 162 reaches the second apex 40D, which is a portion of the operation restricting groove 40 that fits without restricting the movement of the penetrating member 140 toward the base end side. After that, when the pressing force on the penetrating member 140 is released, the penetrating member 140 moves to the non-pressing position P1 toward the base end side due to the biasing force of the biasing member 106, and the hemostatic valve 120 switches from the open state to the closed state. Therefore, according to the opening and closing mechanism 100, the open/closed state of the hemostasis valve 120 can be switched and maintained in that state each time the operator presses the penetrating member 140, thereby improving the operability of the opening and closing mechanism 100.

In addition, in the opening and closing mechanism 100, a hollow annular accommodation hole 147 extending in the front-rear direction is formed on the outer periphery of the through hole 142, and a slit 148 extending in the front-rear direction and communicating with the accommodation hole 147 is formed on the outer periphery surface of the penetrating member 140. In addition, the urging member 106 is cylindrical and is accommodated in the accommodation hole 147 of the penetrating member 140, and a convex portion 114 protruding radially inward is formed on the inner periphery surface of the housing 110, which is inserted into the slit 148 of the penetrating member 140 to restrict the movement of the urging member 106 toward the tip side. Therefore, according to the opening and closing mechanism 100 of this embodiment, the urging member 106 can be disposed in the penetrating member 140, and the overall length of the device can be shortened compared to a configuration in which the urging member 106 is installed between the hemostasis valve 120 and the penetrating member 140.

A-5. Configuration of fixing mechanism 200 for elongated medical device:
Next, the configuration of the fixing mechanism 200 will be described. Figures 12 to 17 are explanatory diagrams showing the configuration of the fixing mechanism 200 in this embodiment. Figures 12 and 13 show its longitudinal section (YZ section), Figures 14 and 15 show its external perspective view, and Figures 16 and 17 show its plan (XY plane). Figures 12, 14 and 16 show the fixing mechanism 200 in a state in which the fixing of a long medical device such as a guidewire GW is released (hereinafter referred to as "released state fixing mechanism 200n"), and Figures 13, 15 and 17 show the fixing mechanism 200 in a state in which a long medical device is fixed (hereinafter referred to as "fixed state fixing mechanism 200f").

The fixing mechanism 200 is a mechanism for fixing and releasing the long medical device inserted into the lumen 13 (FIG. 1) of the medical connector 10. The fixing mechanism 200 of this embodiment is a mechanism that switches between a fixed state in which the long medical device is fixed and a released state in which the long medical device is released, each time the operator performs a sliding operation on the power application member 270. The fixing mechanism 200 includes a housing 210, a shaft member 230, a circular tubular body 220, at least two valve levers 240, an elastic body 250, and a power application member 270.

As shown in Figures 12 and 13, the housing 210 is a substantially cylindrical member and is made of, for example, resin. The entire surface of the base end of the housing 210 is a base end opening 211, and a relatively small diameter tip end opening 212 is formed at the tip of the housing 210. Note that the housing 210 is not shown in Figures 14 to 17.

Figure 18 is a perspective view showing the external configuration of the shaft member 230. The shaft member 230 is a tubular member in which a lumen 233 is formed extending from the tip to the base end, and is made of, for example, resin. As shown in Figures 12 and 13, the shaft member 230 is housed in the housing 210 with the tip protruding from the tip opening 212 of the housing 210 toward the tip side. In the shaft member 230, the lumen 233 extends in the front-rear direction (Z-axis direction).

A flange portion 231 protruding in the outer circumferential direction is formed at the base end of the shaft member 230. The base end side surface of the flange portion 231 abuts against the tip side surface of the tip side portion 110D (see FIG. 1) of the housing 110 of the opening/closing mechanism 100. In addition, the shaft member 230 is formed with a slit hole 234 that communicates its outer circumferential surface with the lumen 233. In this embodiment, the shaft member 230 is formed with four slit holes 234 that are approximately evenly arranged in the circumferential direction. Each slit hole 234 extends along the front-rear direction from a position slightly on the base end side from the tip of the shaft member 230 to just before the flange portion 231. Inside each slit hole 234, a support portion 235 is formed that extends in a direction approximately perpendicular to the front-rear direction (in this embodiment, the X-axis direction or Y-axis direction) so as to connect between the two opposing side walls of the slit hole 234. The cross-sectional shape of the support portion 235 perpendicular to the extension direction is approximately semicircular (see Figures 12 and 13).

Figure 19 is a perspective view showing the external configuration of the circular tubular body 220. The circular tubular body 220 is a flexible circular tubular member having a through hole 227 formed therein through which a long medical device such as a guidewire GW is inserted, and is made of an elastic material such as silicone rubber. The circular tubular body 220 has a circular tubular main body portion 222 that extends in the front-rear direction, and flange portions 221 that are disposed on both ends of the main body portion 222 and have a larger outer diameter than the main body portion 222.

As shown in Figs. 12 to 15, the circular tubular body 220 is housed in the lumen 233 of the shaft member 230 with its axis parallel to the front-rear direction (Z-axis direction). More specifically, the main body 222 of the circular tubular body 220 is housed in the lumen 233, and the flanges 221 at both ends of the circular tubular body 220 protrude to the outside from the front and rear of the lumen 233. The through hole 227 in the circular tubular body 220 is coaxial with the lumen 233. The through hole 227 also constitutes a part of the lumen 13 (see Fig. 1). The front-rear direction (Z-axis direction) is an example of the first direction in the claims.

Figure 20 is a perspective view showing the external configuration of the valve lever 240. The valve lever 240 is a member for fixing a long medical device such as a guidewire GW, and is made of, for example, resin. As shown in Figures 12 to 17, the fixing mechanism 200 has a total of four valve levers 240: a pair of valve levers 240 (first valve levers 240A) arranged to face each other in the Y-axis direction with the circular tubular body 220 in between, and a pair of valve levers 240 (second valve levers 240B) arranged to face each other in the X-axis direction with the circular tubular body 220 in between.

As shown in FIG. 20, each valve lever 240 has, for example, a substantially disk-shaped lever portion 241 and a pointed protruding claw portion 242. Each valve lever 240 also has a support recess 245 that engages with the support portion 235 of the shaft member 230.

12 to 17, each valve lever 240 is supported by the support portion 235 of the shaft member 230 within the slit hole 234 of the shaft member 230 so as to be rotatable about the support portion 235 of the shaft member 230 as a fulcrum. When each valve lever 240 is supported by the support portion 235, the lever portion 241 of each valve lever 240 is formed to protrude toward the outer periphery. In addition, the claw portion 242 of each valve lever 240 is provided at a position where it can interfere with the cylindrical body 220 via the slit hole 234 of the shaft member 230 as the valve lever 240 rotates about the support portion 235 as a fulcrum. More specifically, each valve lever 240 rotates about the support portion 235 as a fulcrum, thereby switching between a non-interference state S1 in which the claw portion 242 is separated from the circular tubular body 220 and does not interfere with the circular tubular body 220 as shown in Figures 12, 14, and 16, and an interference state S2 in which the claw portion 242 interferes with the circular tubular body 220 and elastically deforms the circular tubular body 220 so that the inner diameter of the through hole 227 of the circular tubular body 220 becomes smaller as shown in Figures 13, 15, and 17. When each valve lever 240 is in the interference state S2, the circular tubular body 220 elastically deforms to reduce the inner diameter of the through hole 227, so that the inner circumferential surface of the circular tubular body 220 is pressed against a long medical device such as a guidewire GW inserted through the through hole 227, and as a result, the long medical device is fixed and sliding in the front-rear direction is restricted. The non-interference state S1 is an example of a first state in the scope of the claims, and the interference state S2 is an example of a second state in the scope of the claims.

As described above, the fixing mechanism 200 of this embodiment includes a pair of first valve levers 240A arranged to face each other in the Y-axis direction, and a pair of second valve levers 240B arranged to face each other in the X-axis direction. The positions of the claws 242 in the interference state S2 of the pair of first valve levers 240A and the pair of second valve levers 240B are different from each other along the front-rear direction. Specifically, the position of the claws 242 in the interference state S2 of the pair of first valve levers 240A is closer to the tip side than the position of the claws 242 in the interference state S2 of the pair of second valve levers 240B. This configuration can be realized by making the formation positions of the claws 242 different between the first valve lever 240A and the second valve lever 240B. By adopting such a configuration, the claws 242 of the valve lever 240 can be interfered with the circular tubular body 220 at two positions spaced apart in the front-rear direction, and the long medical device can be more reliably fixed. As shown in FIG. 17, the claws 242 of the pair of first valve levers 240A each have tapered surfaces that face each other and are approximately parallel to each other in the interference state S2, and the long medical device is clamped from both sides by the tapered surfaces of the claws 242 of the pair of first valve levers 240A, thereby achieving even more reliable fixation of the long medical device. This is also true for the pair of second valve levers 240B.

As shown in FIG. 20, each valve lever 240 has a recess 244 that opens toward the outer periphery. As shown in FIG. 12 to FIG. 15, an elastic body 250 is engaged with the recess 244 of each valve lever 240. The elastic body 250 is a ring-shaped member, and is formed of an elastic material such as rubber. The elastic body 250 is arranged to surround the outer periphery of the shaft member 230, and engages with the recess 244 of each valve lever 240 in a tensioned state. Therefore, the elastic body 250 holds each valve lever 240 in a non-interference state S1 or an interference state S2. That is, as shown in FIG. 12, when the elastic body 250 is located on the tip side of the support portion 235 of the shaft member 230 that supports each valve lever 240, the tension of the elastic body 250 holds each valve lever 240 in a non-interference state S1. When each valve lever 240 rotates from this state, causing the elastic body 250 to move toward the base end side beyond the position of the support portion 235 of the shaft member 230, the tension of the elastic body 250 promotes the rotation of each valve lever 240 toward the interference state S2, and each valve lever 240 is maintained in the interference state S2 after it has reached the interference state S2. Conversely, when each valve lever 240 rotates from this state, causing the elastic body 250 to move toward the tip end side beyond the position of the support portion 235 of the shaft member 230, the tension of the elastic body 250 promotes the rotation of each valve lever 240 toward the non-interference state S1, and each valve lever 240 is maintained in the non-interference state S1 after it has reached the non-interference state S1. When each valve lever 240 is in the interference state S2, the inner diameter of the through hole 227 of the cylindrical body 220 becomes smaller due to the interference of each valve lever 240, and the long medical device inserted into the through hole 227 is fixed in place; however, the fixing force at this time can be adjusted by adjusting the tension of the elastic body 250.

As shown in Figs. 12 and 13, the power applying member 270 is a substantially cylindrical member and is made of, for example, resin. The power applying member 270 is accommodated in the housing 210 so as to be slidable in the front-rear direction. A circumferential portion of the power applying member 270 extends so as to protrude toward the base end side of the housing 210, and a flange portion 272 protruding in the outer circumferential direction is formed at the base end of the portion. The flange portion 272 is a portion that accepts the operation of a surgeon, such as a doctor, to slide the power applying member 270. Note that the power applying member 270 is not shown in Figs. 14 to 17.

At the tip of the power applying member 270, a double wall portion 273 is formed to hold the lever portion 241 of each valve lever 240. Therefore, the power applying member 270 can slide in the front-rear direction to interfere with the lever portion 241 and rotate each valve lever 240 to switch the state. More specifically, as shown in FIG. 12, when the power applying member 270 is at a tip side position P2, which is relatively on the tip side, each valve lever 240 is in a non-interference state S1. Also, as shown in FIG. 13, when the power applying member 270 is at a base side position P1, which is closer to the base side than the tip side position P2, each valve lever 240 is in an interference state S2. The tip side position P2 is an example of a second position in the scope of the claims, and the base side position P1 is an example of a first position in the scope of the claims.

A-6. Operation of the fixing mechanism 200 for the elongated medical device:
Next, the operation of the fixing mechanism 200 will be described. In the initial state, the power imparting member 270 is located at the distal end position P2 as shown in Fig. 12. In this state, as shown in Figs. 12, 14 and 16, each valve lever 240 is in a non-interference state S1 in which it does not interfere with the circular tubular body 220, and a long medical device such as a guidewire GW inserted through the through hole 227 of the circular tubular body 220 is not fixed. In other words, the fixing mechanism 200 is a released state fixing mechanism 200n.

For example, when an operator holding the medical connector 10 applies pressure to the power applying member 270 toward the base end (hereinafter referred to as the "fixing operation"), the power applying member 270 slides from the distal position P2 toward the base end. When the power applying member 270 slides from the distal position P2 toward the base end, a load moving toward the base end is applied to the lever portion 241 of each valve lever 240 held by the double wall portion 273 of the power applying member 270, causing each valve lever 240 to rotate about the support portion 235 of the shaft member 230 as a fulcrum against the tension of the elastic body 250. When the elastic body 250 engaged with the recess 244 of each valve lever 240 moves proximally from the position of the support portion 235 in association with this rotation, the tension of the elastic body 250 promotes the rotation of each valve lever 240 toward the interference state S2, and each valve lever 240 is maintained in the interference state S2 after it has reached the interference state S2 (FIGS. 13, 15, and 17). In this state, the inner diameter of the through hole 227 of the circular tubular body 220 is reduced by the interference of each valve lever 240, and the long medical device inserted in the through hole 227 is fixed. As a result, the fixing mechanism 200 becomes a fixed state fixing mechanism 200f. At this time, the power applying member 270 is located at the proximal position P1.

In addition, when the fixing mechanism 200 is in the fixed state fixing mechanism 200f, if the operator applies an operation of pressing the power applying member 270 toward the distal end side in the opposite direction to the fixing operation (hereinafter referred to as the "fixing release operation"), the power applying member 270 slides from the base end position P1 toward the distal end side. When the power applying member 270 slides from the base end position P1 toward the distal end side, a load moving toward the distal end side is applied to the lever portion 241 of each valve lever 240 clamped by the double wall portion 273 of the power applying member 270, and each valve lever 240 rotates around the support portion 235 of the shaft member 230 as a fulcrum against the tension of the elastic body 250. When the elastic body 250 engaged with the recess 244 of each valve lever 240 moves distally beyond the position of the support portion 235 due to this rotation, the tension of the elastic body 250 promotes the rotation of each valve lever 240 toward the non-interference state S1, and each valve lever 240 is maintained in the non-interference state S1 after it reaches the non-interference state S1 (FIGS. 12, 14, and 16). In this state, each valve lever 240 does not interfere with the circular tubular body 220, so that the inner diameter of the through hole 227 is enlarged to its original size due to the elastic restoring force of the circular tubular body 220, and the fixation of the long medical device inserted through the through hole 227 is released. As a result, the fixing mechanism 200 becomes the fixed state fixing mechanism 200f. At this time, the power imparting member 270 is located at the distal position P2.

In this way, each time the operation (fixing operation and release operation) of sliding the power applying member 270 to the base end side or the tip end side is performed, the state of the fixing mechanism 200 switches between the release state fixing mechanism 200n and the fixed state fixing mechanism 200f. At this time, the operator can easily know whether the fixing mechanism 200 is in the release state or the fixed state by visually checking the position of the power applying member 270 in the front-to-rear direction. In addition, when sliding the power applying member 270, the force required to slide the power applying member 270 clearly changes before and after the elastic body 250 passes the position of the support part 235, so the operator can easily know by touch whether the fixing operation or the release operation has been performed correctly.

A-7. Technical effects of the fixing mechanism 200 for elongated medical devices:
As described above, in the fixing mechanism 200, by sliding the power imparting member 270 from the distal end position P2 to the proximal end position P1 along the front-rear direction, which is the extension direction of the circular tubular body 220, each valve lever 240 can be switched from a non-interference state S1 in which it does not interfere with the circular tubular body 220 to an interference state S2 in which it interferes with the circular tubular body 220. As a result, the claw portions 242 of each valve lever 240 are pressed against the circular tubular body 220, reducing the inner diameter of the through hole 227 of the circular tubular body 220, and the long medical device can be fixed. At this time, the tension of the elastic body 250 holds each valve lever 240 in the interference state S2, thereby maintaining the fixed state of the long medical device. Moreover, by sliding the power imparting member 270 from the base end position P1 to the tip end position P2 along the front-rear direction, each valve lever 240 can be switched from the interference state S2 to the non-interference state S1, whereby the claw portion 242 of each valve lever 240 is released from interference with the cylindrical body 220, and the fixed state of the long medical device is released. At this time, the tension of the elastic body 250 keeps each valve lever 240 in the non-interference state S1, so that the fixed state of the long medical device is maintained. Therefore, according to the fixing mechanism 200 of this embodiment, the fixing and release of the long medical device can be realized by an operation of sliding the power imparting member 270, which is easier than the conventional operation of rotating a screw, and the fixation state of the long medical device can be grasped by touch and vision, so that the operability of the fixing mechanism 200 can be improved.

The fixing mechanism 200 also includes multiple sets of two valve levers 240 that face each other across the circular tubular body 220, and the positions of the claws 242 in the interference state S2 of each set of valve levers 240 differ from each other along the front-rear direction. Therefore, according to the fixing mechanism 200, the claws 242 of the multiple sets of valve levers 240 can fix the long medical device at multiple positions along the front-rear direction of the circular tubular body 220, making it possible to fix the long medical device more reliably.

B. Variations:
The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the spirit of the invention. For example, the following modifications are also possible.

The configurations of the medical connector 10, the opening/closing mechanism 100, and the fixing mechanism 200 in the above embodiment are merely examples and can be modified in various ways. For example, in the above embodiment, the fixing mechanism 200 has four valve levers 240, but the number of valve levers 240 provided in the fixing mechanism 200 can be modified to any number as long as it is two or more.

In the above embodiment, the housing 110 of the opening/closing mechanism 100 is composed of three parts (tip side part 110D, middle part 110M, and base side part 110P), but the housing 110 may be composed of two or less parts, or may be composed of four or more parts. Similarly, in the above embodiment, the penetrating member 140 of the opening/closing mechanism 100 is composed of three parts (tip side part 140D, middle part 140M, and base side part 140P), but the penetrating member 140 may be composed of two or less parts, or may be composed of four or more parts.

In the above embodiment, the biasing member 106 of the opening/closing mechanism 100 is housed in the housing hole 147 of the housing 110, but the biasing member 106 may be disposed in another position.

The dimensions and materials of each component in the above embodiment are merely examples and can be modified in various ways.

In the above embodiment, the medical connector 10 has both the opening/closing mechanism 100 and the fixing mechanism 200, but the medical connector 10 may have only one of the opening/closing mechanism 100 and the fixing mechanism 200.

10: Medical connector 11: Main pipe section 12: Branch pipe section 13: Lumen 14: Lumen 20: Rotator 40: Operation restriction groove 40A: Closed position section 40B: First apex section 40C: Open holding section 40D: Second apex section 100: Opening and closing mechanism 102: Ring member 106: Pressing member 108: Cover member 110: Housing 110D: Distal end section 110M: Middle section 110P: Base end section 111: Base end opening 112: Distal end opening 113: Lumen 114: Convex section 115: Flange section 116: First wall section 117: Second wall section 118: Storage space 120: Hemostatic valve 121: Slit 122: Through hole 127: Main body section 128: Convex section 140: Penetrating member 140D: Tip side portion 140M: Middle portion 140P: Base side portion 142: Through hole 144: Tip portion 145: Flange portion 147: Storage hole 148: Slit 160: Ring pin 161: Main body portion 162: Pin portion 200: Fixing mechanism 200f: Fixed state fixing mechanism 200n: Released state fixing mechanism 210: Housing 211: Base end side opening 212: Tip side opening 220: Circular tubular body 221: Flange portion 222: Main body portion 227: Through hole 230: Shaft member 231: Flange portion 233: Lumen 234: Slit hole 235: Support portion 240: Valve lever 241: Lever portion 242: Claw portion 244: Recess 245: Support recess 250: Elastic body 260: Holding mechanism 270: Power imparting member 272: Flange portion 273: Double wall portion 300: Joint member GC: Guiding catheter GW: Guide wire

Claims (3)

A hemostasis valve opening and closing mechanism, comprising:
a tubular housing having a lumen communicating with a distal end opening and a proximal end opening;
a hemostasis valve attached within the housing, which is normally in a closed state and, when pressed from the base end side, is in an open state in which a through hole communicating with the tip end opening of the housing is formed;
a penetrating member having a through hole formed therein and accommodated within the housing so as to be slidable along a first direction which is the extension direction of the lumen on the base end side of the hemostatic valve, the penetrating member being capable of being positioned at a first position which places the hemostatic valve in a closed state, and at a second position displaced from the first position to the tip end side along the first direction, where the hemostatic valve is placed in the open state by pressing the hemostatic valve, thereby connecting the through hole of the hemostatic valve with the through hole of the penetrating member;
a ring pin having a ring-shaped main body portion surrounding an outer peripheral surface of the penetrating member and a pin portion protruding radially inward from the main body portion, the ring pin being accommodated in the housing in a state in which movement in the first direction is restricted on the base end side of the hemostasis valve and rotation around the first direction is permitted;
A biasing member that biases the penetrating member toward the base end side;
Equipped with
A movement restricting groove is formed on the surface of the penetrating member, the movement restricting groove being continuous all around the circumference,
The pin portion of the ring pin is loosely fitted into the movement restricting groove,
The movement restricting groove is formed with a closed position portion into which the pin portion fits without restricting movement of the penetrating member toward the tip end side when the penetrating member is in a first state in which the penetrating member is in the first position, a first apex portion into which the pin portion fits without restricting movement of the penetrating member toward the base end side when the penetrating member reaches a position more distal than the second position from the first state, an open holding portion into which the pin portion fits so as to restrict movement of the penetrating member toward the base end side when the penetrating member is in a third state in which the penetrating member is displaced from the second state to the second position by the biasing force of the biasing member, and a second apex portion into which the pin portion fits without restricting movement of the penetrating member toward the base end side when the penetrating member reaches a position more distal than the second position from the third state.
Hemostasis valve opening and closing mechanism. The hemostasis valve opening and closing mechanism according to claim 1,
A hollow annular receiving hole is formed on an outer circumferential side of the through hole in the penetrating member, the hollow annular receiving hole extending in the first direction,
A slit is formed on an outer peripheral surface of the penetrating member, the slit extending in the first direction and communicating with the receiving hole,
The biasing member is cylindrical and is accommodated in the accommodation hole of the penetrating member,
A convex portion is formed on an inner peripheral surface of the housing, the convex portion protruding radially inward and inserted into the slit of the penetrating member to restrict movement of the biasing member toward the tip side.
Hemostasis valve opening and closing mechanism. The opening and closing mechanism of the hemostasis valve according to claim 1 or 2 ,
A fixing mechanism for the elongated medical device;
A medical connector comprising:

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