pusher

Abstract

The application provides a pusher and a delivery device for a closure device. The pusher is used for loading the closure device, and comprises an operating handle at the proximal end of the pusher, a connecting head for fixed connection with the closure device, and a push rod connected at one end with the operating handle and at the other end with the connecting head. The part of the push rod close to the operating handle is provided with a marking area, and the marking area comprises a plurality of marking elements. In the axial direction of the push rod, each marking element is movable forward and backward in the marking area, so as to mark the positions of different parts of the closure device. The marking elements in the marking area are movable forward and backward, and the relative positions of the marking elements in the marking area can be adjusted according to different models of the closure device, so as to realize the extracorporeal universal marking of different closure devices, thereby solving the problem of the universality of the determination of the intracorporeal positions of different closure devices. The pusher provided by the application can meet the requirement of the operator that the specific intracorporeal delivery positions of a plurality of closure devices with different models and styles can be known extracorporeally.

Description

Technical Field

[0001] This application relates to the field of cardiac occlusion device delivery equipment, and more particularly to a pusher. Background Technology

[0002] Left atrial appendage occlusion (LAAO) is a procedure that uses an occluder to block the left atrial appendage (LAA) to prevent thrombus formation during atrial fibrillation (AF), thereby reducing the risk of long-term disability or death due to thromboembolism in AF patients. The delivery of the occluder to the LA requires a delivery device, which typically includes a delivery sheath and a pusher. The pusher is used to load the occluder. Before the occlusion procedure, the pusher, which is loaded externally with the occluder, is inserted into the sheath from the distal end. Once the delivery sheath is in place, the operator pushes the pusher from the proximal end to the distal end of the delivery sheath to release the occluder into the body.

[0003] However, with the innovative development of materials, biodegradable occluders are increasingly used in clinical practice. Because these occluders are not visible in vivo, it is impossible to determine their location during delivery, increasing the risk of surgical failure. Furthermore, a wide variety of occluder models are available on the market, and different surgeons have different observation requirements during occlusion procedures. Currently, it is difficult to meet the requirement that surgeons can determine the specific delivery location of various occluders of different models in vivo from outside the body; in other words, the problem of universality in determining the location of different occluders in vivo remains unresolved.

[0004] Therefore, there is an urgent need for a new plug delivery device. Summary of the Invention

[0005] The first aspect of this application provides a pusher, comprising: a pusher for loading a blocking device, the pusher including:

[0006] The control handle is located near the pusher.

[0007] Connector, used for fixed connection with the plugging device;

[0008] The push rod is connected to the operating handle at one end and to the connector at the other end. The part of the push rod near the operating handle is provided with a marking area, which includes multiple markers. Each marker can move back and forth in the marking area along the axial direction of the push rod to mark the position of different parts of the plug.

[0009] The pusher provided in this application has a marking area with multiple movable markers within it. After the pusher's connector is fixedly connected to the occluder, the pusher can be operated to pull the occluder from the distal end of the delivery sheath into the sheath. During the pulling process, the markers can be used to mark the junctions of different parts of the occluder. When the delivery sheath and pusher are placed inside the body and the occluder is released from the distal end of the delivery sheath to the target tissue, the markers in the marking area allow the operator to know the specific delivery location of the occluder and the actual portion released inside the body from outside the body. The movable markers in the marking area allow the relative position of the markers in the marking area to be adjusted according to different occluder models, achieving universal marking for different occluders outside the body, thereby solving the problem of universality in determining the location of different occluders inside the body. The pusher provided in this application can meet the requirement that the operator can know the specific delivery location of various occluders of different models and types inside the body from outside the body.

[0010] In some optional embodiments of this application, the markers are ring-shaped, with each marker looped around the outer periphery of the push rod.

[0011] In some optional embodiments of this application, the same marking features of each marker are different from each other to mark different parts of the occluder. The marking features are selected from at least one of the outer contour shape, surface marking number and color.

[0012] In some optional embodiments of this application, the marker is an elastic collar ring. The marker has an extended state and a tightened state. In the extended state, the marker expands radially in the push rod and can move back and forth in the marking area. In the tightened state, the marker is fixed in the marking area.

[0013] In some optional embodiments of this application, the marker is a metal ring with internal threads formed on its inner circumference, and the push rod is a steel cable rod.

[0014] In some optional embodiments of this application, the push rod includes a slide rail formed on the outer peripheral surface of the push rod and extending upward along the axial direction of the push rod. A protrusion is provided on the inner ring side of the marker, which protrudes toward the ring center of the marker and engages with the slide rail, so that the marker can slide relative to the push rod.

[0015] In some optional embodiments of this application, the push rod further includes a plurality of annular grooves spaced apart along the axial direction of the push rod. The annular grooves are formed on the outer peripheral surface of the push rod, and the radial direction of the annular grooves is perpendicular to the axial direction of the push rod.

[0016] The inner ring side of the marker is provided with an elastic retainer, which has a retracted state and an extended state.

[0017] When the elastic clip is in the retracted state, the marker is movably positioned between two adjacent annular grooves.

[0018] When the elastic clip is in the extended position, the marker is secured in the annular groove.

[0019] In some optional embodiments of this application, a receiving groove is provided on the inner ring side of the marker, and the receiving groove extends radially from the inner ring surface of the marker to the outer ring surface of the marker.

[0020] The elastic locking component includes an elastic element and a locking post. One end of the elastic element is fixedly disposed at the bottom of the receiving groove, and the other end of the elastic element is connected to the bottom of the locking post. The top of the locking post is exposed through the opening of the receiving groove, and the shape of the locking post is adapted to the annular groove.

[0021] In the retracted state, the locking pin is inside the receiving groove and compresses the elastic element; in the extended state, the top of the locking pin extends out of the receiving groove and the elastic element resets.

[0022] In some optional embodiments of this application, the marking element includes a coaxially arranged spun outer ring and a clamping inner ring, the clamping inner ring being disposed on the inner ring side of the spun outer ring and threadedly connected to the spun outer ring, and the marking element having a free state and a clamped state.

[0023] In the free state, the threads between the outer spinning ring and the inner clamping ring are loosely fitted, and the marker can be slidably positioned in the marking area.

[0024] In the clamped state, the outer ring and the inner ring are screwed together, and the marking piece is clamped to the outer circumference of the push rod by the inner ring.

[0025] In some optional embodiments of this application, the spun outer ring is provided with an internal thread and a frustum-shaped inner hole in sequence along its own axial direction on its inner ring side. The cross-sectional dimension of the frustum-shaped inner hole decreases axially away from the internal thread on the spun outer ring.

[0026] The clamping inner ring has external threads and a frustum-shaped extrusion port sequentially arranged on its outer ring side along its own axial direction. The cross-sectional dimension of the frustum-shaped extrusion port decreases axially away from the external threads on the clamping inner ring. The frustum-shaped extrusion port also has multiple strip-shaped grooves, which are spaced apart circumferentially along the frustum-shaped extrusion port, and the extension direction of the strip-shaped grooves is the same as the extension direction of the generatrix of the frustum-shaped extrusion port.

[0027] The internal and external threads are matched to make the clamping inner ring and the spinning outer ring threaded together. In the clamping state, the frustum-shaped extrusion port is inserted into the frustum-shaped inner hole, and the frustum-shaped extrusion port radially contracts through the extrusion action of the frustum-shaped inner hole on the outer circumferential surface of the frustum-shaped extrusion port, so that the clamped inner ring extrudes the outer circumferential surface of the push rod.

[0028] The second aspect of this application provides a plugging device delivery apparatus, which includes the pusher of the first aspect of this application. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the pusher provided in this application;

[0030] Figure 2 This is a schematic diagram of a plugging device in its original state.

[0031] Figure 3 This is a schematic diagram of the structure of the pusher provided in this application when it is loaded with a plug and pulled into the inner cavity of the sheath body of the delivery sheath;

[0032] Figure 4 yes Figure 2 The diagram shows the plug in its fully extended state.

[0033] Figure 5 This is a three-dimensional structural diagram of the push rod in the marking area portion of another embodiment of the pusher provided in this application;

[0034] Figure 6 This is a three-dimensional structural diagram of the marker in a retracted state in another embodiment of the pusher provided in this application;

[0035] Figure 7 This is a three-dimensional structural diagram of the marker in the extended state in another embodiment of the pusher provided in this application;

[0036] Figure 8 This is a front view of the pusher provided in another embodiment of the present application when the marker is in the extended state;

[0037] Figure 9 yes Figure 8 Schematic diagram of the cross-sectional structure at the CC point;

[0038] Figure 10 This is a three-dimensional structural diagram of the pusher provided in this application, showing the push rod in the marked area from a certain perspective.

[0039] Figure 11 This is a front view of the spinning outer ring in another embodiment of the pusher provided in this application;

[0040] Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure at point BB;

[0041] Figure 13 This is a side view of the pusher provided in this application clamping the inner ring in another embodiment;

[0042] Figure 14 yes Figure 13 Schematic diagram of the cross-sectional structure at point BB;

[0043] Figure 15 This is a three-dimensional structural diagram of the pusher provided in this application from another perspective of the push rod being located in the marked area portion;

[0044] Figure 16 yes Figure 15 A schematic diagram of the initial position structure of the marker at DD as it changes from a free state to a clamped state;

[0045] Figure 17 yes Figure 16 A schematic diagram of the cross-sectional structure at point BB;

[0046] Figure 18 yes Figure 15 A top-view structural diagram showing the termination position of the process from the free state to the clamped state of the marker at point DD;

[0047] Figure 19 yes Figure 18 A schematic diagram of the cross-sectional structure at point BB.

[0048] Explanation of reference numerals in the attached figures:

[0049] Operating handle -1;

[0050] Connector-2;

[0051] Push rod-3; slide rail-31; annular groove-32;

[0052] Marker-4; Protrusion-41; Elastic clip-42; Elastic element-421; Clip-422; Receiving groove-43; Spin-out outer ring-44; Internal thread-441; Frustum-shaped inner hole-442; Clamping inner ring-45; External thread

[0053] -451; Frustum-shaped extrusion port -452; Strip-shaped groove -453;

[0054] Marked area - A;

[0055] Blocker-5; Left disc anchor head-51, Left disc body-52, Waist section-53, Right disc body-54, Right disc anchor head-55.

[0056] Delivery sheath-6; Sheath body-61; Hemostatic valve-62;

[0057] The spun outer ring is away from the axial direction of the internal thread -Y1;

[0058] Clamp the inner ring away from the external thread axial direction -Y2;

[0059] Tightening direction during the process of screwing the outer ring and clamping the inner ring threads - Y3. Detailed Implementation

[0060] The following will be combined with the appendix Figure 1 To be continued Figure 19 The technical solution of this application is described in detail.

[0061] like Figure 1 As shown, this application provides a pusher, including: a pusher for loading a blocker 5, the pusher including:

[0062] Operating handle 1 is located near the pusher;

[0063] Connector 2 is used for fixed connection with the plugger 5;

[0064] The push rod 3 is connected to the operating handle 1 at one end and to the connector 2 at the other end. The part of the push rod 3 near the operating handle 1 is provided with a marking area A. The marking area A includes multiple marking elements 4. On the axial direction of the push rod 3, each marking element 4 can move back and forth in the marking area A to mark the position of different parts of the plugger 5.

[0065] The pusher provided in this application has a marking area A, in which multiple markers 4 can move back and forth. After the connector 2 of the pusher is fixedly connected to the occluder 5, the pusher can be operated to pull the occluder 5 from the distal end of the delivery sheath 6 into the delivery sheath 6. During the pulling process, the markers 4 can be used to mark the junctions of different parts of the occluder 5. When the delivery sheath 6 and the pusher are placed inside the body and the occluder 5 is released from the distal end of the delivery sheath 6 to the target tissue, the markers 4 in the marking area A allow the operator to know the specific delivery position of the occluder 5 inside the body and the actual portion that has been released, even from outside the body. The markers 4 in the marking area A can move back and forth, and the relative position of the markers 4 in the marking area A can be adjusted according to different models of the occluder 5, realizing universal marking for different occluders 5 outside the body, thereby solving the problem of universality in determining the position of different occluders 5 inside the body. The pusher provided in this application can meet the requirement that the operator can know the specific delivery position of various models and types of occluders 5 inside the body from outside the body. The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0066] It should be noted that in the embodiments of this application, the end of the device (such as a pusher) that is closer to the practitioner in actual use is called the proximal end, and the end that is farther away from the practitioner (i.e., closer to the patient) is called the distal end.

[0067] In some optional embodiments of this application, the marker 4 is annular. In these embodiments, the marker 4 is annular, and each marker 4 is looped around the outer periphery of the push rod 3.

[0068] In some optional embodiments of this application, the same marking features of each marker 4 are different from each other to mark different parts of the blocker 5. The marking features are selected from at least one of the outer contour shape, surface marking number and color.

[0069] In some of these examples, the occluder 5 includes different parts with varying shapes and functions. For example, Figure 2 As shown, from left to right, it includes a left disc anchor head 51, a left disc body 52, a waist section 53, a right disc body 54, and a right disc anchor head 55. The right disc anchor head 55 includes a threaded joint, and the plug 5 is threadedly connected to the connector 2 of the pusher through the threaded joint, so that the plug 5 is fixedly connected to the pusher, and the plug 5 is loaded onto the pusher. Figure 2 The diagram shows the structure of the plug 5 in its original state when it is not subjected to external tension.

[0070] The delivery sheath 6 includes a sheath body 61 and a hemostatic valve 62 connected to each other. Generally, before loading the occluder 5 onto the pusher, the operating handle 1 is held and the connector 2 of the pusher is inserted from the proximal end of the delivery sheath 6 into the sheath lumen of the delivery sheath 6, passing through the inner cavity of the sheath body 61 of the delivery sheath 6, with the distal opening of the connector 2 extending out of the sheath body 61 of the delivery sheath 6. At this time, the occluder 5 is then threadedly connected to the pusher. Subsequently, the operating handle 1 is held and the pusher is moved backward relative to the delivery sheath 6 to pull the occluder 5 from the outside into the inner cavity of the sheath body 61 of the delivery sheath 6. Because the body of the occluder 5 has a stretchable and deformable mesh structure, the occluder 5 elongates axially along the delivery sheath 6 during the process of being pulled into the inner cavity of the sheath body 61 of the delivery sheath 6.

[0071] Figure 4L1 corresponds to the unfolded portion of the left disc 52, L2 corresponds to the unfolded portion of the waist 53, and L3 corresponds to the unfolded portion of the right disc 54. During the process of the occluder 5 being pulled into the inner cavity of the sheath body 61 of the delivery sheath 6, the right disc 54 extends first, followed by the waist 53, and finally the left disc 52. In a specific example, when the right disc anchor head 55 just enters the inner cavity of the sheath body 61, the first marker 4 is moved to a position flush with the right opening end face of the hemostatic valve 62 and held stationary. Continue moving the pusher axially along the delivery sheath 6 from the distal end to the proximal end, pulling in the occluder 5. When it is observed that the right disc 54 is completely inside the sheath body 61 of the delivery sheath 6, and the junction of the waist 53 and the right disc 54 is at the distal end of the sheath body 61, move the second marker 4 to a position flush with the right opening end face of the hemostatic valve 62 and keep the second marker 4 stationary. This second marker 4 represents the starting position of the right disc 54 when the occluder 5 is subsequently released in vivo (i.e., moving the pusher from the proximal end to the distal end of the delivery sheath 6 so that the occluder 5 is released from the sheath body 61 of the delivery sheath 6 to the outside of the delivery sheath 6 to the specific position of the occluder 5 in vivo). In other words, when the occluder 5 is released in vivo, this second marker 4 is back at the distal end of the sheath body 61, indicating that the release of the right disc 54 in vivo has just begun.

[0072] From the above example, it can be deduced that during the process of the occluder 5 being pulled into the inner cavity of the sheath body 61 of the delivery sheath 6, when the junction of different parts of the occluder 5 is at the port of the distal end of the sheath body 61, a corresponding marker 4 is moved to a position flush with the right opening end face of the hemostatic valve 62 at this time and kept stationary. During the release of the occluder 5 in the body, the marker 4 serves as the release start mark for the corresponding part.

[0073] In some examples, the markers 4 in marking area A are distinguished from each other by at least one of the following: outer contour shape, surface marking number, and color. For example, there are four markers 4 in marking area A: the outer contour shape of the first marker 4 is triangular with a circular hole in the middle; the outer contour shape of the second marker 4 is quadrilateral with a circular hole in the middle; the outer contour shape of the third marker 4 is pentagonal with a circular hole in the middle; and the outer contour shape of the fourth marker 4 is circular with a circular hole in the middle.

[0074] In another example, there are four markers 4 in the marking area A. The first marker 4 has the number "1" printed on its outer surface, the second marker 4 has the number "2" printed on its outer surface, the third marker 4 has the number "3" printed on its outer surface, and the fourth marker 4 has the number "4" printed on its outer surface.

[0075] In another example, there are four markers 4 in the marking area A. The outer surface of the first marker 4 is coated with a red film, the outer surface of the second marker 4 is coated with a green film, the outer surface of the third marker 4 is coated with a white film, and the outer surface of the fourth marker 4 is coated with a blue film.

[0076] In some optional embodiments of this application, the marker 4 is an elastic collar with an extended state and a tightened state. In the extended state, the marker 4 expands radially along the push rod 3 and can move back and forth within the marking area A. In the tightened state, the marker 4 is fixed to the marking area A. In some examples of these embodiments, the practitioner can expand the marker 4 radially along the push rod 3, causing it to expand on the push rod 3. The marker 4 undergoes elastic deformation and is positioned loosely on the outer periphery of the push rod 3. The marker 4 can move back and forth with the marking area A to the desired marking position. Once the marker 4 has moved to the desired marking position, the practitioner can remove the force applied to expand it. Because the marker 4 has the ability to recover from deformation, it contracts radially and tightens onto the push rod 3 after the external force is removed. At this time, the marker 4 can be fixed in the marking area A to correspond to the junction of different parts of the occluder 5.

[0077] In some optional embodiments of this application, the marker 4 is a metal ring with an internal thread 441 formed on its inner circumference, and the push rod 3 is a steel cable rod.

[0078] In some examples of these embodiments, the steel cable pole is formed by winding one or more metal wires around a metal core. An internal thread 441 is formed on the inner circumference of the metal loop. When the operator needs to move the marker 4 to the desired marking position, the marker 4 can be loosened, causing it to detach from the steel cable pole. When the operator needs to fix the marker 4 in the desired marking position, the marker 4 can be tightened, clamping the marker 4 onto the steel cable pole under tension for a fixed connection.

[0079] like Figures 5 to 9 As shown, in some optional embodiments of this application, the push rod 3 includes a slide rail 31, which is formed on the outer peripheral surface of the push rod 3 and extends upward along the axial direction of the push rod 3. The inner ring side of the marker 4 is provided with a protrusion 41, which protrudes toward the ring center of the marker 4 and is engaged with the slide rail 31, so that the marker 4 can slide relative to the push rod 3.

[0080] In some examples of these embodiments, the push rod 3 includes two slide rails 31 arranged radially opposite to each other. The inner ring side of the marker 4 is provided with two radially opposite protrusions 41, which respectively engage with the slide rails 31 on both sides, so that the marker 4 can move smoothly and steadily on the rails in the marking area A of the push rod 3, which is convenient for the operator.

[0081] In some optional embodiments of this application, the push rod 3 further includes a plurality of annular grooves 32 spaced apart along the axial direction of the push rod 3. The annular grooves 32 are formed on the outer peripheral surface of the push rod 3, and the radial direction of the annular grooves 32 is perpendicular to the axial direction of the push rod 3.

[0082] The inner ring side of the marker 4 is provided with an elastic retainer 42, which has a retracted state and an extended state.

[0083] When the elastic retainer 42 is in the retracted state, the marker 4 is movably positioned between two adjacent annular grooves 32.

[0084] When the elastic clip 42 is in the extended state, the marker 4 is secured in the annular groove 32.

[0085] In these embodiments, the annular groove 32 is used to fix the marker 4 on the push rod 3, improve the accuracy of the marking position of the marker 4, and avoid marking errors caused by the sliding of the marker 4.

[0086] In some optional embodiments of this application, a receiving groove 43 is provided on the inner ring side of the marker 4, and the receiving groove 43 extends radially from the inner ring surface of the marker 4 to the outer ring surface of the marker 4.

[0087] The elastic locking element 42 includes an elastic element 421 and a locking post 422. One end of the elastic element 421 is fixedly disposed at the bottom of the receiving groove 43, and the other end of the elastic element 421 is connected to the bottom of the locking post 422. The top of the locking post 422 is exposed through the opening of the receiving groove 43, and the shape of the locking post 422 is adapted to the annular groove 32.

[0088] In the retracted state, the locking pin 422 is inside the receiving groove 43 and compresses the elastic element 421. In the extended state, the top of the locking pin 422 extends out of the groove of the receiving groove 43 and the elastic element 421 is reset.

[0089] In some examples of these embodiments, the elastic element 421 is a spring.

[0090] The inner diameter of the marking element 4 is larger than the diameter of the push rod 3, and the gap between the marking element 4 and the push rod 3 is smaller than the length of the locking post 422 extending out of the receiving groove 43. Therefore, when the marking element 4 moves between the two annular grooves 32, the outer peripheral surface of the push rod 3 contacts the locking post 422 of the elastic locking element 42 and presses the locking post 422 radially into the receiving groove 43, compressing the elastic element 421 at the bottom of the locking post 422. When the marking element 4 moves into the annular groove 32, the outer peripheral surface of the push rod 3 no longer presses against the elastic locking element 42, the elastic element 421 deforms and returns to its original position, i.e., the elastic element 421 resets, and the locking post 422 extends out from the opening of the receiving groove 43 and engages in the annular groove 32, preventing the marking element 4 from moving axially along the push rod 3, thereby fixing the marking element 4 at the marking location on the push rod 3.

[0091] like Figure 10 As shown, in some optional embodiments of this application, the push rod 3 includes a slide rail 31, which is formed on the outer peripheral surface of the push rod 3 and extends upward along the axial direction of the push rod 3. The inner ring side of the marker 4 is provided with a protrusion 41, which protrudes toward the ring center of the marker 4 and is engaged with the slide rail 31, so that the marker 4 can slide relative to the push rod 3.

[0092] In some examples of these embodiments, the push rod 3 includes two slide rails 31 arranged radially opposite to each other. The inner ring side of the marker 4 is provided with two radially opposite protrusions 41, which respectively engage with the slide rails 31 on both sides, so that the marker 4 can move smoothly and steadily on the rails in the marking area A of the push rod 3, which is convenient for the operator.

[0093] In some embodiments of this application, the marking element 4 includes a coaxially arranged spun outer ring 44 and a clamping inner ring 45. The clamping inner ring 45 is disposed on the inner ring side of the spun outer ring 44 and threadedly connected to the spun outer ring 44. The marking element 4 has a free state and a clamped state.

[0094] In the free state, the outer spinning ring 44 and the inner clamping ring 45 are loosely threaded, and the marker 4 is slidably disposed in the marking area A.

[0095] In the clamped state, the outer ring 44 and the inner ring 45 are screwed together, and the marker 4 is clamped to the outer circumference of the push rod 3 by the inner ring 45.

[0096] In these embodiments, a loose threaded fit between the spun outer ring 44 and the clamping inner ring 45 means that the spun outer ring 44 and the clamping inner ring 45 are threadedly connected as a single unit, but no preload is applied between the spun outer ring 44 and the clamping inner ring 45, so that the clamping inner ring 45 is not clamped to the push rod 3; or a loose threaded fit between the spun outer ring 44 and the clamping inner ring 45 means that the threads of the paired spun outer ring 44 and the clamping inner ring 45 constituting the marking element 4 are not threadedly connected, and no preload is applied between the spun outer ring 44 and the clamping inner ring 45, so that the clamping inner ring 45 is not clamped to the push rod 3. A tightening fit means that by tightening the spun outer ring 44 and the clamping inner ring 45, a preload is applied between the spun outer ring 44 and the clamping inner ring 45, so that the clamping inner ring 45 is clamped to the push rod 3.

[0097] In some optional embodiments, the marking element 4 includes a coaxially arranged spun outer ring 44 and a clamping inner ring 45, the clamping inner ring 45 being disposed on the inner ring side of the spun outer ring 44 and threadedly connected to the spun outer ring 44, and the marking element 4 having a free state and a clamped state.

[0098] In the free state, the outer spinning ring 44 and the inner clamping ring 45 are loosely threaded, and the marker 4 is slidably disposed in the marking area A.

[0099] In the clamped state, the outer ring 44 and the inner ring 45 are screwed together, and the marker 4 is clamped to the outer circumference of the push rod 3 by the inner ring 45.

[0100] In some optional embodiments, the spun outer ring 44 is provided with an internal thread 441 and a frustum-shaped inner hole 442 in sequence on its own axial direction on its own inner ring side. The cross-sectional dimension of the frustum-shaped inner hole 442 decreases in the axial direction Y1 away from the internal thread of the spun outer ring.

[0101] The clamping inner ring 45 has an external thread 451 and a frustum-shaped extrusion port 452 sequentially arranged on its outer ring side along its own axial direction. The cross-sectional dimension of the frustum-shaped extrusion port 452 decreases along the axial direction Y2 away from the external thread on the clamping inner ring. The frustum-shaped extrusion port 452 also has multiple strip-shaped grooves 453, which are spaced apart circumferentially along the frustum-shaped extrusion port 452. The extending direction of the strip-shaped grooves 453 is the same as the extending direction of the generatrix of the frustum-shaped extrusion port.

[0102] The internal thread 441 and the external thread 451 are sized to match so that the clamping inner ring 45 and the spun outer ring 44 are threadedly connected. In the clamping state, the frustum-shaped extrusion port 452 is inserted into the frustum-shaped inner hole 442 and the frustum-shaped extrusion port 452 is radially contracted by the extrusion action of the frustum-shaped inner hole 442 on the outer peripheral surface of the frustum-shaped extrusion port 452, so that the clamped inner ring 45 extrudes the outer peripheral surface of the push rod 3.

[0103] like Figure 11 and Figure 12 As shown, in some embodiments of this application, the spun outer ring 44 is provided with an internal thread 441 and a frustum-shaped inner hole 442 in sequence on its own axial direction on its own inner ring side. The cross-sectional dimension of the frustum-shaped inner hole 442 decreases in the axial direction Y1 away from the internal thread of the spun outer ring.

[0104] like Figure 13 and Figure 14 As shown, the clamping inner ring 45 has an external thread 451 and a frustum-shaped extrusion port 452 sequentially arranged on its outer ring side along its own axial direction. The cross-sectional dimension of the frustum-shaped extrusion port 452 decreases along the axial direction Y2 away from the external thread of the clamping inner ring. The frustum-shaped extrusion port 452 also has multiple strip-shaped grooves 453, which are spaced apart circumferentially along the frustum-shaped extrusion port 452, and the extension direction of the strip-shaped grooves 453 is the same as the extension direction of the generatrix of the frustum-shaped extrusion port. The protrusion 41 of the marking element 4 is formed on the inner side of the clamping inner ring 45. The arrangement of the strip-shaped grooves 453 allows the frustum-shaped extrusion port 452 to have more deformation allowance in its own radial direction. The frustum-shaped extrusion port 452 has a greater degree of deformation in its own radial direction due to external extrusion, thereby increasing the radial extrusion effect on the push rod 3 and thus better fixing it to the push rod 3.

[0105] like Figure 15 As shown, the push rod 3 has multiple markers 4 on the part of the marking area A, which are in both a free state and a clamped state. When it is necessary to change the marker 4 from the free state to the clamped state, the outer ring 44 and the inner ring 45 need to be tightened along the tightening direction Y3 during the tightening process of the outer ring and the inner ring, and the two are threadedly connected.

[0106] Figure 16 yes Figure 15 A schematic diagram of the initial position structure of marker 4 at DD as it changes from a free state to a clamped state. Figure 17 yes Figure 16 A cross-sectional structural diagram at point BB. The initial position of marker 4 during the process of changing from the free state to the clamped state indicates that the outer spinning ring 44 and the inner clamping ring 45 are not threaded together, and the outer spinning ring 44 does not apply a squeezing force to the inner clamping ring 45. Figure 18 yes Figure 15 A top-view structural schematic diagram showing the termination position of the process from the free state to the clamped state of marker 4 at point DD. Figure 19 yes Figure 18 The cross-sectional structure diagram at BB is shown in the figure. The termination position of the process from the free state to the clamped state refers to the threaded connection between the outer spinning ring 44 and the inner clamping ring 45, and the threads of the outer spinning ring 44 and the inner clamping ring 45 are fully engaged, with the outer spinning ring 44 applying a squeezing force to the inner clamping ring 45.

[0107] like Figures 16 to 19 As shown, the outer ring 44, along the twisting direction Y3 during the tightening process between the outer ring and the inner ring, first passes through the frustum-shaped extrusion port 452 of the inner ring 45, and then is threadedly connected to the outer thread 451 of the inner ring 45 by twisting. During the twisting process, the frustum-shaped inner hole 442 continuously applies a squeezing action to the outer circumferential surface of the frustum-shaped extrusion port 452. The frustum-shaped extrusion port 452 is embedded in the frustum-shaped inner hole 442 and, through the aforementioned squeezing action of the frustum-shaped inner hole 442, the strip groove 453 on the frustum-shaped extrusion port 452 continuously narrows, and then the frustum-shaped extrusion port 452 contracts radially, so that the inner ring 45 squeezes the outer circumferential surface of the push rod 3. The marker 4 is clamped to the push rod 3 by squeezing the outer circumferential surface of the push rod 3 through the inner ring 45.

[0108] During the process of changing the marking part 4 from the clamped state to the free state, simply loosen the outer ring 44 and the inner ring 45 by rotating them in the opposite direction to the tightening direction Y3 during the tightening process of the outer ring and the inner ring. After loosening, the squeezing effect of the inner ring 45 on the outer circumference of the push rod 3 disappears, and the marking part 4 can move freely in the axial direction of the push rod 3.

[0109] In these embodiments, by cleverly designing the threaded structure of the outer spinning ring 44 and the inner clamping ring 45, the marker 4 can move smoothly and freely in the axial direction of the push rod 3 while being fixed at any position. This allows for stepless adjustment of the marker 4 within the marking area A of the push rod 3, greatly ensuring the universality of the marking area A of the pusher for marking various types of occluders 5 on the market. The marker 4 has a simple structure and can efficiently switch between free and clamped states.

[0110] The second aspect of this application provides a blocker 5 delivery device, which includes the pusher of the first aspect of this application.

Claims

1. A pusher, characterized in that, The pusher is used to load the occluder, and the pusher includes: The operating handle is located near the pusher; Connector for fixed connection with the plug; The push rod has one end connected to the operating handle and the other end connected to the connector. A marking area is provided on the part of the push rod near the operating handle. The marking area includes multiple ring-shaped marking elements. On the axial direction of the push rod itself, each marking element is wrapped around the outer periphery of the push rod and can move back and forth in the marking area to mark the position of different parts of the occluder. The marking element includes a coaxially arranged spun outer ring and a clamping inner ring. The clamping inner ring is disposed on the inner ring side of the spun outer ring and is threadedly connected to the spun outer ring. The marking element has a free state and a clamped state. In the free state, the outer spinning ring and the inner clamping ring are loosely threaded, and the marking element is slidably disposed in the marking area. In the clamping state, the outer spinning ring and the inner clamping ring are threaded together, and the marking element is clamped to the push rod by pressing the outer peripheral surface of the push rod through the inner clamping ring. The spun outer ring has an internal thread and a frustum-shaped inner hole sequentially arranged on its inner ring side along its own axial direction. The cross-sectional dimension of the frustum-shaped inner hole decreases axially away from the internal thread on the spun outer ring. The clamping inner ring has an external thread and a frustum-shaped extrusion port sequentially arranged on its outer ring side along its own axial direction. The cross-sectional dimension of the frustum-shaped extrusion port decreases axially away from the external thread on the clamping inner ring. The frustum-shaped extrusion port also has multiple strip-shaped grooves, which are arranged at intervals along the circumference of the frustum-shaped extrusion port, and the extending direction of the strip-shaped grooves is the same as the extending direction of the generatrix of the frustum-shaped extrusion port. The internal thread and the external thread are matched in size to make the clamping inner ring and the spinning outer ring threadedly connected. In the clamping state, the frustum-shaped extrusion port is embedded in the frustum-shaped inner hole and the frustum-shaped extrusion port is radially contracted by the extrusion action of the frustum-shaped inner hole on the outer peripheral surface of the frustum-shaped extrusion port, so that the clamping inner ring extrudes the outer peripheral surface of the push rod.

2. The pusher according to claim 1, characterized in that, Each of the aforementioned marking elements has a different characteristic of the same type, so as to mark different parts of the occluder. The marking feature is selected from at least one of the outer contour shape, surface marking number and color.

3. The pusher according to claim 1, characterized in that, The push rod includes a slide rail formed on the outer peripheral surface of the push rod and extending upward along the axial direction of the push rod. The inner ring side of the marker is provided with a protrusion, which is formed on the inner side of the clamping inner ring. The protrusion protrudes toward the ring center of the marker and engages with the slide rail, so that the marker can slide relative to the push rod.

4. A plugging device delivery device, characterized in that, The plug delivery device includes a pusher as described in any one of claims 1 to 3.

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