A delivery handle and delivery system for a left atrial appendage occluder

Abstract

The present invention discloses a delivery handle and delivery system for a left atrial appendage occluder, wherein the delivery handle comprises a proximal handle and a distal handle which are socketed and can rotate and slide relative to each other, the proximal handle is connected to the proximal end of the left atrial appendage occluder through a proximal cable, the distal handle is connected to the distal end of the left atrial appendage occluder through a distal cable, at least one of the proximal handle and the distal handle is provided with an identification portion for characterizing the relative displacement of the proximal handle and the distal handle; and also comprises a locking mechanism for locking or unlocking the proximal handle and the distal handle. The above-mentioned delivery handle and delivery system can better meet the installation and delivery requirements of a left atrial appendage occluder controlled by dual cables, and can realize the unlocking and locking of the proximal handle and the distal handle, and can reduce the difficulty of operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a delivery handle and a delivery system for a left atrial appendage occluder. Background Art

[0002] The left atrial appendage occluder is used to block the left atrial appendage, which can reduce the incidence of stroke in patients with atrial fibrillation. Its working principle is: using the left atrial appendage occluder to block the left atrium entrance of the left atrial appendage, blocking the blood flow between the left atrial appendage and the left atrium, thereby preventing the thrombus generated by the left atrial appendage from entering the atrium, thereby reducing the risk of stroke.

[0003] At present, there is a left atrial appendage occluder, the distal and proximal ends of which are connected to control cables, which can control and adjust the shape of the left atrial appendage occluder during the release process. For this type of left atrial appendage occluder, how to provide a delivery handle to complete the above-mentioned control process is still a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The purpose of the present invention is to provide a delivery handle and delivery system for a left atrial appendage occluder, which can better meet the installation and delivery requirements of a left atrial appendage occluder controlled by a dual cable, and can realize the unlocking and locking of the proximal handle and the distal handle, and can reduce the difficulty of operation.

[0005] In order to solve the above technical problems, the present invention provides a delivery handle of a left atrial appendage occluder, comprising a proximal handle portion and a distal handle portion which are socketed and can rotate and slide relative to each other, the proximal handle portion is connected to the proximal portion of the left atrial appendage occluder through a proximal cable, and the distal handle portion is connected to the distal portion of the left atrial appendage occluder through a distal cable, at least one of the proximal handle portion and the distal handle portion is provided with an identification portion for indicating the relative displacement of the proximal handle portion and the distal handle portion; and also includes a locking mechanism for locking or unlocking the proximal handle portion and the distal handle portion.

[0006] In specific practice, the left atrial appendage occluder can be conveniently delivered as a whole through centralized control of the proximal handle and the distal handle, and the deployment state and the posture during installation of the left atrial appendage occluder can be conveniently controlled through separate control of the proximal handle and the distal handle (including axial displacement and circumferential rotation), thereby better meeting the installation and delivery requirements of the left atrial appendage occluder controlled by dual cables.

[0007] When the proximal handle and the distal handle do not need to be controlled separately or have been adjusted, the proximal handle and the distal handle can be locked by the locking mechanism to prevent the proximal handle and the distal handle from moving relative to each other without control. When the proximal handle and the distal handle need to be operated to move relative to each other, the locking mechanism can be used to unlock them.

[0008] The relative displacement between the proximal handle and the distal handle can be determined through the marking portion, which can effectively avoid excessive movement and penetration of the left atrial appendage due to operational errors, thereby reducing the difficulty of operating the left atrial appendage occluder provided by the present invention.

[0009] Optionally, the marking portion is a scale line.

[0010] Optionally, the locking mechanism includes a locking member, which is installed on the outer side of the proximal handle and the distal handle with an adjustable radial assembly depth. When the locking member is radially pressed against the inner side of the proximal handle and the distal handle, the proximal handle and the distal handle can be locked.

[0011] Optionally, the locking member includes a rod and an operating head, and the rod is threadedly connected to one of the proximal handle and the distal handle located on the outside.

[0012] Optionally, the locking mechanism includes an inner shell and an outer shell, the inner shell is installed on the outer one of the proximal handle and the distal handle, a pad is further provided on the radial inner side of the inner shell, the inner shell is provided with a pressing piece that can move radially, and the pressing piece is provided with a stop portion; the outer shell is outer-fitted to the inner shell and can slide axially relative to the inner shell, the shell wall of the outer shell is provided with a hole-type or groove-type stop fitting portion, and an elastic member is further provided between the outer shell and the inner shell, and when the outer shell and the inner shell slide toward each other so that the stop portion is embedded in the stop fitting portion, the outer shell can press the pad axially so that the pad can deform radially to press the inner one of the proximal handle and the distal handle, and the elastic member is in an energy storage state.

[0013] Optionally, the pad is clamped between one of the proximal handle and the distal handle located on the outside and the inner shell, and the pad abuts against the inner wall surface of the inner shell in the radial direction.

[0014] Optionally, a shell wall of the inner shell is provided with a notch at a position corresponding to the pressing piece in the radial direction, and a handle wall of one of the proximal handle and the distal handle located on the outside is provided with a hole-type or groove-type avoidance portion at a position corresponding to the pressing piece in the radial direction.

[0015] Optionally, the shell includes an outer cylinder portion and an inner cylinder portion connected to each other, the stop fitting portion is arranged on the outer cylinder portion, the inner cylinder portion can be axially opposed to the cushion portion, the elastic member is a spring, and the spring sleeve is installed on the inner cylinder portion.

[0016] Optionally, the locking mechanism also includes a locking sleeve, which is installed on the outer side of the proximal handle and the distal handle with an adjustable axial assembly depth, and the outer side of the proximal handle and the distal handle or the locking sleeve is provided with an expansion portion having a wedge-shaped cross-section at least partially in the axial direction, and the locking sleeve which is displaced axially can position the proximal handle and the distal handle through the expansion portion.

[0017] Optionally, the locking sleeve is threadedly connected to the outer one of the proximal handle and the distal handle.

[0018] Optionally, among the proximal handle and the distal handle, the one located on the inner side has a protruding portion extending out of the one located on the outer side, and the protruding portion is detachably mounted with an operating portion.

[0019] Optionally, the proximal cable is sheathed around the distal cable, and a reinforcement tube is installed on a portion of the sheath of the distal cable close to the distal handle.

[0020] Optionally, the proximal cable is sheathed around the distal cable, and the locking mechanism includes a damping portion; the damping portion is disposed between the proximal cable and the distal cable; and / or the damping portion is disposed between the proximal handle and the distal handle.

[0021] Optionally, at least one of the proximal handle and the distal handle includes a main handle and a cover cap which are separately arranged in the axial direction, and the cover cap is cylindrical, and its inner wall is provided with reinforcing ribs extending in the radial direction for fixing a connecting tube, and the connecting tube is used to install the proximal cable or the distal cable.

[0022] The present invention also provides a delivery system for a left atrial appendage occluder, comprising a guide assembly and a loading assembly, wherein the loading assembly is used to accommodate the left atrial appendage occluder; and also comprises a delivery handle, wherein the delivery handle is the delivery handle of the left atrial appendage occluder mentioned above.

[0023] Since the delivery handle of the above-mentioned left atrial appendage occluder already has the above-mentioned technical effects, the delivery system of the left atrial appendage occluder having the delivery handle should also have similar technical effects, so it will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a first specific embodiment of a delivery system for a left atrial appendage occluder provided by the present invention, including a delivery handle;

[0025] Figure 2 is a schematic diagram of the structure of the guide assembly;

[0026] Figure 3 , Figure 4It is a schematic diagram of the structure of two loading components;

[0027] Figure 5 A structural diagram of the connection between the proximal cable, the distal cable and the left atrial appendage occluder;

[0028] Figure 6 A structural diagram of the connection between the second specific implementation of the delivery handle of the left atrial appendage occluder provided by the present invention and the proximal cable and the distal cable;

[0029] Figure 7 for Figure 6 The structural diagram of the middle conveying handle;

[0030] Figure 8 for Figure 7 sectional view of

[0031] Fig. 9 A schematic structural diagram of a third specific implementation mode of the delivery handle of the left atrial appendage occluder provided by the present invention;

[0032] Fig.10 for Fig. 9 sectional view of

[0033] Fig.11 A schematic structural diagram of a variation of a third specific implementation of the delivery handle of the left atrial appendage occluder provided by the present invention;

[0034] Fig.12 for Fig.11 sectional view of

[0035] Fig.13 for Fig.12 A partial enlarged view of the matching parts of the middle locking sleeve and the proximal handle and distal handle.

[0036] Figure 1-Figure 13 The reference numerals in the figures are described as follows:

[0037] 1 proximal handle, 11 main handle, 12 cover cap, 121 reinforcing rib, 122 connecting tube, 13 operating part;

[0038] 2 distal handle, 21 avoidance portion;

[0039] 3 Near-end cable;

[0040] 4 remote end cables, 41 reinforcement tubes;

[0041] 5. Logo department;

[0042] 6 locking mechanism, 61 locking member, 62 inner shell, 621 cushion portion, 622 pressing member, 622a stopper portion, 63 outer shell, 631 outer tube portion, 631a stopper matching portion, 632 inner tube portion, 64 elastic member, 65 locking sleeve, 66 expansion portion;

[0043] 7 guide assembly, 71 outer sheath, 72 blood sealing valve, 73 dilator;

[0044] 8 loading components;

[0045] 9Left atrial appendage occluder. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] The term “several” as used herein refers to an indefinite number of multiples, usually more than two; and when “several” is used to indicate the number of certain components, it does not indicate the quantitative relationship between these components.

[0048] Please refer to Figure 1-Figure 13 , Figure 1 This is a structural schematic diagram of a first specific embodiment of a delivery system for a left atrial appendage occluder provided by the present invention, including a delivery handle. Figure 2 is a schematic diagram of the structure of the guide component. Figure 3 The schematic diagram of the loading assembly is shown in Figure 1. Figure 4 It is a structural diagram of another loading component. Figure 5 This is a structural diagram of the connection between the proximal cable, the distal cable and the left atrial appendage occluder. Figure 6 This is a structural diagram of the connection between the second specific embodiment of the delivery handle of the left atrial appendage occluder provided by the present invention and the proximal cable and the distal cable. Figure 7 for Figure 6 Schematic diagram of the structure of the conveying handle. Figure 8 for Figure 7 A cross-sectional view of Fig. 9 This is a structural schematic diagram of a third specific embodiment of the delivery handle of the left atrial appendage occluder provided by the present invention. Fig.10 for Fig. 9 A cross-sectional view of Fig.11 This is a structural schematic diagram of a variation of a third specific implementation of the delivery handle of the left atrial appendage occluder provided by the present invention. Fig.12 for Fig.11 A cross-sectional view of Fig.13 for Fig.12 A partial enlarged view of the matching parts of the middle locking sleeve and the proximal handle and distal handle.

[0049] In this article, the proximal end of the left atrial appendage occluder 9 refers to the end of the left atrial appendage occluder 9 relatively close to the operator, and the distal end refers to the end of the left atrial appendage occluder 9 relatively far away from the operator; similarly, for other components, the end relatively close to the operator can be called the proximal end of the component, and the end relatively far away from the operator can be called the distal end of the component.

[0050] like Figure 1 As shown, the present invention provides a delivery handle of a left atrial appendage occluder 9, comprising a proximal handle 1 and a distal handle 2 which are connected to each other and can rotate and slide relative to each other, the proximal handle 1 is connected to the proximal end of the left atrial appendage occluder 9 through a proximal cable 3, and the distal handle 2 is connected to the distal end of the left atrial appendage occluder 9 through a distal cable 4, the proximal handle 1 can control the proximal end of the left atrial appendage occluder 9 to move through the proximal cable 3, and the distal handle 2 can control the distal end of the left atrial appendage occluder 9 to move through the distal cable 4. At least one of the proximal handle 1 and the distal handle 2 is provided with an identification portion 5 for indicating the relative displacement of the proximal handle 1 and the distal handle 2; and also includes a locking mechanism 6 for locking or unlocking the proximal handle 1 and the distal handle 2.

[0051] In specific practice, the left atrial appendage occluder 9 can be conveniently delivered as a whole through centralized control of the proximal handle 1 and the distal handle 2, and the deployment state and the posture of the left atrial appendage occluder 9 during installation can be conveniently controlled through separate control of the proximal handle 1 and the distal handle 2 (including axial displacement and circumferential rotation), thereby better meeting the installation and delivery requirements of the left atrial appendage occluder 9 controlled by dual cables.

[0052] During assembly, the proximal handle 1 can be located inside the distal handle 2, or the distal handle 2 can be located inside the proximal handle 1, which needs to be determined in combination with the structures of the two handles.

[0053] When there is no need to control the proximal handle 1 and the distal handle 2 separately, or when the adjustment is completed, the proximal handle 1 and the distal handle 2 can be locked by the locking mechanism 6 to prevent the proximal handle 1 and the distal handle 2 from uncontrolled relative movement. When the proximal handle 1 and the distal handle 2 need to be operated to perform relative movement, the locking mechanism 6 can be used to unlock them.

[0054] The relative displacement between the proximal handle 1 and the distal handle 2 can be determined by the marking portion 5, which can effectively avoid excessive movement and penetration of the left atrial appendage due to operational errors, thereby reducing the difficulty of operating the left atrial appendage occluder 9 provided by the present invention.

[0055] The marking part 5 can be a scale line, and the scale line can have several scales or only one scale. Both schemes can be adopted in practical applications. In addition, the marking part 5 can also adopt a non-scale line mark, such as a red or other relatively eye-catching color mark, and its shape is not limited to a line, and can also be a triangle or other shapes.

[0056] Combination Figure 5, the proximal cable 3 is used to connect to the proximal end of the left atrial appendage occluder 9, and the distal cable 4 is used to connect to the distal end of the left atrial appendage occluder 9. Here, the embodiment of the present invention does not limit the connection method between each cable and the left atrial appendage occluder 9. During the specific implementation, those skilled in the art can set it according to actual needs. Generally speaking, the connection method between each cable and the left atrial appendage occluder 9 can be a threaded connection; each cable can be made of steel cable, or other materials that can meet the requirements.

[0057] Based on the connection relationship between the two cables, in actual assembly, the proximal cable 3 can be installed in the distal cable 4. With this structure, the distal cable 4 will be relatively thin. Fig.10 A reinforcing tube 41 may also be installed on the outer sleeve of the distal cable 4 near the distal handle 2 to improve the strength.

[0058] The reinforcing tube 41 may specifically be a metal tube, such as a stainless steel tube, etc. During actual assembly, the reinforcing tube 41 may be fixed by welding or other methods.

[0059] Furthermore, a damping portion (not shown in the figure) can be provided between the proximal cable 3 and the distal cable 4. The damping portion can be made of a flexible material such as silicone, and its outer diameter can be slightly larger than the inner diameter of the proximal cable 3, that is, the damping portion can be interference fitted in the proximal cable 3, and the inner diameter of the damping portion can be slightly smaller than the outer diameter of the distal cable 4. In this way, an interference fit can also be formed between the damping portion and the distal cable 4. With such arrangement, when the two handles move relative to each other, the left atrial appendage occluder 9 is in a stretched or contracted state, and the damping part applies a certain damping to the proximal cable 3 and the distal cable 4, so that the left atrial appendage occluder 9 is locked in any stretched or contracted state, and can be locked without setting other locking structures. In other words, the damping part can be used as a specific implementation of the locking mechanism, and is more conducive to ensuring the release state of the left atrial appendage occluder 9 in the atrium, so as to more stably control the release and adjustment of the left atrial appendage occluder 9; at the same time, when the two handles move relative to each other, there is moving damping, and the operating feel is better; in addition, the above-mentioned damping part can also play a certain blood sealing effect.

[0060] The damping part may also be disposed between the proximal handle 1 and the distal handle 2, and in this case, a similar technical effect may be achieved. The number of the damping part is at least one.

[0061] At least one of the proximal handle 1 and the distal handle 2 may include a main handle 11 and a cover cap 12 which are separately arranged in the axial direction. The cover cap 12 may be cylindrical, and its inner wall may be provided with reinforcing ribs 121 extending in the radial direction for fixing a connecting tube 122, thereby improving the fixing strength of the connecting tube 122; the connecting tube 122 is used for installing a proximal cable 3 or a distal cable 4, and is specifically used for connecting the proximal cable 3 in the embodiment of the accompanying drawings.

[0062] Combination Fig.10 The proximal handle 1 can be configured as a structure including a main handle 11 and a cap 12, and the distal handle 2 can be an integrated structure. This configuration can facilitate the assembly of the proximal cable 3 and the distal cable 4.

[0063] There are many options for the structural form of the locking mechanism 6, as long as it can achieve locking and unlocking of the proximal handle 1 and the distal handle 2. The present invention will hereinafter combine multiple embodiments to illustrate the structure that can be adopted by the locking mechanism 6.

[0064] Embodiment 1

[0065] like Figure 1 As shown, in the first embodiment, the locking mechanism 6 may include a locking member 61, which is mounted on the outer side of the proximal handle 1 and the distal handle 2 with an adjustable radial assembly depth. In this way, when the locking member 61 is not pressed against the inner side of the proximal handle 1 and the distal handle 2 in the radial direction, the proximal handle 1 and the distal handle 2 can move relative to each other; and when the locking member 61 is pressed against the inner side of the proximal handle 1 and the distal handle 2 in the radial direction, the proximal handle 1 and the distal handle 2 can be locked.

[0066] There are also many options for the installation method of the locking member 61 that can adjust the radial assembly depth. For example, the locking member 61 can include a rod and an operating head, and the rod can be threadedly connected to the outer one of the proximal handle 1 and the distal handle 2; thus, by adjusting the threaded insertion depth of the rod, the assembly depth of the locking member 61 can be adjusted. In addition, the locking member 61 can also be a spring pin or other components, which can also achieve similar technical effects.

[0067] In the scheme of the accompanying drawings, combined Figure 1 The distal handle 2 can be inserted into the proximal handle 1, and the aforementioned locking piece 61 can be inserted into the handle wall of the proximal handle 1, and its radial assembly depth can be adjusted relative to the handle wall of the proximal handle 1.

[0068] Embodiment 2

[0069] like Figure 6-Figure 8As shown, in the second embodiment, the locking mechanism 6 may include an inner shell 62 and an outer shell 63 , and the inner shell 62 may be installed on one of the proximal handle 1 and the distal handle 2 located on the outside.

[0070] In the embodiment of the drawings, the distal handle 2 is mounted on the proximal handle 1, and correspondingly, the inner shell 62 is mounted on the distal handle 2. The following embodiment of the present invention uses this solution as an example to explain the specific structure of the locking mechanism 6 in this embodiment. The structural form of the locking mechanism 6 corresponding to the solution in which the proximal handle 1 is mounted on the distal handle 2 is similar to that of the distal handle 2, and a repeated description is not given herein.

[0071] Combination Figure 8 , a cushion portion 621 may be further provided on the radial inner side of the inner shell 62, and the cushion portion 621 may be specifically made of a flexible material with a certain elasticity such as rubber so as to be able to deform and recover; the inner shell 62 may be provided with a pressing piece 622 that can move in the radial direction, and the pressing piece 622 may be provided with a stop portion 622a; in the assembled state, the outer shell 63 may be externally mounted on the inner shell 62, and may be able to slide axially relative to the inner shell 62, the shell wall of the outer shell 63 may be provided with a hole-shaped or groove-shaped stop fitting portion 631a, and an elastic member 64 may be further provided between the outer shell 63 and the inner shell 62, and when the outer shell 63 and the inner shell 62 slide toward each other so that the stop portion 622a is embedded in the stop fitting portion 631a, the outer shell 63 may press the cushion portion 621 in the axial direction, so that the cushion portion 621 may be able to deform radially to compress the proximal handle 1, thereby achieving locking of the proximal handle 1 and the distal handle 2, and the elastic member 64 may be in an energy storage state.

[0072] When unlocking is required, the pressing member 622 can be pressed radially, that is, the stopper portion 622a can be disengaged from the stopper matching portion 631a, and the elastic force accumulated by the elastic member 64 can be released, so that the outer shell 63 can be pushed relatively away from the inner shell 62. In this way, the axial force acting on the pad 621 can be eliminated, and the pad 621 can be restored to its original shape, thereby releasing the locking of the proximal handle 1 and the distal handle 2, and the proximal handle 1 and the distal handle 2 can slide or rotate relative to each other.

[0073] In addition, the relative sliding between the inner shell 62 and the outer shell 63 also needs to prevent the inner shell 62 and the outer shell 63 from sliding relative to each other when the stopper 622a and the stopper matching part 631a are disengaged. This effect can be achieved by setting a limiting structure. For example, the limiting structure can include a matching slider and a slide groove. The sliding of the slider in the slide groove can guide the relative sliding between the inner shell 62 and the outer shell 63. At the same time, the two groove end walls in the length direction of the slide groove can limit the relative sliding distance between the inner shell 62 and the outer shell 63. Of the slider and the slide groove, one can be set on the inner shell 62 and the other can be set on the outer shell 63.

[0074] The cushion portion 621 can be clamped between the inner shell 62 and the distal handle 2, and the outer wall surface of the cushion portion 621 can be radially opposed to the inner wall surface of the inner shell 62. In this way, when the cushion portion 621 is subjected to the axial extrusion force from the outer shell 63, the cushion portion 621 has no space to deform outwards, and can only deform radially inwards, thereby compressing and fixing the proximal handle 1 and the distal handle 2.

[0075] It should be pointed out that the pad 621 can actually be only snap-fitted to the inner shell 62, which does not affect the implementation of the above-mentioned solution; there are many options for the installation and fixing method between the inner shell 62 and the distal handle 2, such as bonding, threaded connection, snap-fit, etc., preferably a detachable connection method such as threaded connection and snap-fit ​​to facilitate disassembly and assembly.

[0076] Furthermore, a notch may be provided in the shell wall of the inner shell 62 at a position corresponding to the pressing piece 622 in the radial direction, that is, the shell wall of the inner shell 62 may not be a complete wall surface in the circumferential direction. The formed notch can be used to avoid the pressing piece 622 and can ensure that the pressing piece 622 has sufficient downward space, so as to facilitate the miniaturized design of the radial dimension of the inner shell 62.

[0077] Furthermore, the handle wall of the distal handle 2 may be provided with a hole-shaped or groove-shaped avoidance portion 21 at a position corresponding to the pressing member 622 in the radial direction. The avoidance portion 21 may also achieve the technical effect of avoiding the pressing member 622 from moving downward.

[0078] Of course, the above-mentioned notch and avoidance portion 21 may not exist, that is, the shell wall of the inner shell 62 may also form a complete wall surface in the circumferential direction. In this case, a certain radial spacing is required between the pressing member 622 and the inner shell 62 to meet the pressing requirements.

[0079] Please continue to refer to Figure 8 The outer shell 63 may include an outer cylinder portion 631 and an inner cylinder portion 632 connected to each other, and a connecting wall is formed at the connection between the outer cylinder portion 631 and the inner cylinder portion 632. The stop fitting portion 631a may be arranged on the outer cylinder portion 631, and the inner cylinder portion 632 may be axially abutted against the cushion portion 621; the elastic member 64 is specifically a spring, and the spring may be installed in the inner cylinder portion 632 in an outer sleeve, and the axial ends of the spring may respectively abut against the connecting wall and the inner shell 62.

[0080] It should be noted that the elastic member 64 is not limited to the above-mentioned spring. In fact, it can also adopt other elastic elements such as elastic ropes, elastic blocks, etc., as long as the corresponding technical effects can be achieved.

[0081] Embodiment 3

[0082] like Fig. 9 , Fig.10As shown, in the third embodiment, the locking mechanism 6 may include a locking sleeve 65 , which is installed on the outer side of the proximal handle 1 and the distal handle 2 with an adjustable axial assembly depth.

[0083] exist Fig. 9 , Fig.10 In the embodiment, the proximal handle 1 can be located outside the distal handle 2, and accordingly, the locking sleeve 65 is installed on the proximal handle 1. The following embodiments of the present invention all take this solution as an example to illustrate the structure of the locking mechanism 6 involved in this embodiment. The structural form of the locking mechanism 6 corresponding to the solution in which the distal handle 2 is installed on the proximal handle 1 is similar, and no repeated description is made herein.

[0084] In detail, the locking sleeve 65 can be configured with a tightening portion 66 whose axial cross-section is at least partially wedge-shaped. In this way, by adjusting the axial assembly depth of the locking sleeve 65, the proximal handle 1 and the distal handle 2 can be compressed or released by the tightening portion 66, thereby achieving locking or unlocking of the proximal handle 1 and the distal handle 2.

[0085] The expansion part 66 can be made of a flexible material such as rubber to ensure the reliability of the compression. The installation structure of the expansion part 66 and the lock body 65 is not limited here. In the embodiment of the accompanying drawings, the two are assembled by snap-fitting. In addition, various connection schemes such as vulcanization and bonding can also be used as long as the reliable connection between the two can be ensured.

[0086] There are also many options for connecting the locking sleeve 65 with the proximal handle 1. Generally speaking, the locking sleeve 65 and the proximal handle 1 can be connected by a thread, so that the axial assembly depth of the locking sleeve 65 can be easily adjusted by screwing the locking sleeve 65. In addition, the locking sleeve 65 can also adopt a structure similar to a spring pin.

[0087] like Figure 11-13 As shown, in a variation of the third embodiment, the distal handle 2 may be located outside the proximal handle 1. In this case, the proximal portion of the distal handle 2 is used to install the distal cable 4, and the distal portion of the distal handle 2 is used to install the aforementioned locking sleeve 65. The assembly method of the locking sleeve 65 is similar to that described above and will not be repeated here.

[0088] and Fig. 9 , Fig.10In this variation, the expansion part 66 can be directly arranged on the distal handle 2. In this way, by continuously adjusting the axial installation position of the locking sleeve 65, the proximal handle 1 and the distal handle 2 can also be positioned and pressed by the expansion part 66. The material selection of the expansion part 66 is consistent with the above-mentioned definition. In addition, in this variation, the expansion part 66 can actually be installed on the locking sleeve 65, that is, the aforementioned Fig. 9 , Fig.10 The lock sleeve structure in can also achieve similar technical effects; similarly, Fig. 9 , Fig.10 Embodiments may also employ Figure 11-13 The solution in .

[0089] Furthermore, among the proximal handle 1 and the distal handle 2, the one located on the inner side may have a protruding portion extending out of the one located on the outer side, and the protruding portion is detachably mounted with an operating portion 13 to facilitate operation of the one located on the inner side.

[0090] by Figure 11-13 Taking the illustrated variation as an example, the operating portion 13 can be mounted on the proximal handle 1, and a detachable mounting method is adopted, so that the setting position of the operating portion 13 can be conveniently adjusted. The specific mounting method can be a threaded connection, or a radially penetrating fixing hole can be provided in the operating portion 13, and a connecting member in the form of a screw or the like can pass through the fixing hole to be tightly pressed against the outer wall of the proximal handle 1, thereby fixing the position of the operating portion 13.

[0091] Of course, the operating portion 13 may also be connected by a fixed connection method such as welding that is not easy to disassemble, which is also practically feasible.

[0092] The present invention also provides a delivery system for a left atrial appendage occluder, comprising a guide assembly 7 and a loading assembly 8, wherein the loading assembly 8 is used to accommodate a left atrial appendage occluder 9; and also comprises a delivery handle, which is the delivery handle of the left atrial appendage occluder involved in the above-mentioned embodiments.

[0093] Since the delivery handle of the above-mentioned left atrial appendage occluder 9 already has the above-mentioned technical effects, the delivery system of the left atrial appendage occluder having the delivery handle should also have similar technical effects, so it will not be elaborated here.

[0094] Combination Figure 2-Figure 5, the guide assembly 7 may include an outer sheath 71, the proximal end of the outer sheath 71 is connected with a blood sealing valve 72, and the dilator 73 may be installed in the outer sheath 71. When performing left atrial appendage occlusion, firstly, the femoral vein is punctured through the guide assembly 7, from the inferior vena cava to the right atrium, and the atrial septum is punctured until the deep part of the left atrial appendage; then the dilator 73 is withdrawn, and the loading assembly 8 loaded with a left atrial appendage occluder 9 of a suitable model is connected to the proximal end of the outer sheath 71; the proximal end and the distal end of the left atrial appendage occluder 9 are respectively connected to the proximal handle 1 and the distal handle 2 through the proximal cable 3 and the distal cable 4, and then the proximal handle 1 and the distal handle 2 are controlled to achieve the adjustment, release and retraction of the left atrial appendage occluder 9.

[0095] When the left atrial appendage occluder 9 is released, the proximal handle 1 and the distal handle 2 can be synchronously moved first, so that the left atrial appendage occluder 9 can reach the distal end of the outer sheath 71 to be in a releasable position; then, the outer sheath 71 can be withdrawn to expose a part of the left atrial appendage occluder 9; then, the distal handle 2 can be operated to locate the distal end of the left atrial appendage occluder 9; then, the outer sheath 71 can be continued to be withdrawn until the left atrial appendage occluder 9 is fully exposed; then, the position of the proximal end of the left atrial appendage occluder 9 can be adjusted by operating the proximal handle 1, and before the proximal position is adjusted, the left atrial appendage occluder 9 is not fixed to the inner wall tissue, and the release state of the left atrial appendage occluder can be adjusted at any time without scratching the inner wall tissue of the left atrial appendage. If the released position is not suitable, the left atrial appendage occluder 9 can also be put into the outer sheath 71 as a whole first, and then released, which is also feasible.

[0096] There are many options for the structural form of the loading assembly 8, as long as it can meet the loading requirements. Figure 3 The loading assembly 8 shown is provided with a blood sealing valve 72. Figure 4 The loading assembly 8 shown is not equipped with a blood sealing valve 72 . Both forms of loading assemblies 8 can be used in practical applications.

[0097] The left atrial appendage occluder 9 is generally provided with barbs, which can penetrate into the inner wall tissue of the left atrial appendage after release to fix the left atrial appendage. When the delivery handle and delivery system provided by the present invention are used, the left atrial appendage occluder 9 can be controlled to deform (such as Figure 5 In this way, the barbs can also be deformed and retracted, and it is not easy to scratch the inner wall tissue of the left atrial appendage, which can better solve the scratching of the inner wall tissue of the left atrial appendage caused by the traditional left atrial appendage occluder 9 during the retraction process.

[0098] It should be pointed out that although the embodiments of the present invention all take the delivery of the left atrial appendage occluder 9 as an example to describe the structure and function of the delivery handle and the delivery system provided by the present invention, this does not mean that the delivery handle and the delivery system can only be used for the delivery of the left atrial appendage occluder 9. In fact, they can also be used in congenital heart occluders, stoma devices and other devices that need to be delivered through interventional methods.

[0099] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A delivery handle for a left atrial appendage occluder, characterized in that: The device comprises a proximal handle (1) and a distal handle (2) which are sleeved together and can rotate and slide relative to each other, the proximal handle (1) being connected to the proximal end of a left atrial appendage occluder (9) via a proximal cable (3), and the distal handle (2) being connected to the distal end of the left atrial appendage occluder (9) via a distal cable (4), and at least one of the proximal handle (1) and the distal handle (2) being provided with an identification portion (5) for indicating the relative displacement of the proximal handle (1) and the distal handle (2); It also includes a locking mechanism (6) for locking or unlocking the proximal handle (1) and the distal handle (2); The locking mechanism (6) comprises an inner shell (62) and an outer shell (63); the inner shell (62) is mounted on one of the proximal handle (1) and the distal handle (2) which is located on the outside; a pad (621) is further provided on the radial inner side of the inner shell (62); the inner shell (62) is provided with a pressing member (622) which can move in the radial direction, and the pressing member (622) is provided with a stopper (622a); the outer shell (63) is externally mounted on the inner shell (62) and can slide axially relative to the inner shell (62); a hole is provided on the shell wall of the outer shell (63) A stop fitting portion (631a) is provided between the outer shell (63) and the inner shell (62). When the outer shell (63) and the inner shell (62) slide toward each other so that the stop portion (622a) is embedded in the stop fitting portion (631a), the outer shell (63) can press the cushion portion (621) in the axial direction so that the cushion portion (621) can be deformed in the radial direction to compress the inner side of the proximal handle portion (1) and the distal handle portion (2), and the elastic member (64) is in an energy storage state.

2. The delivery handle of the left atrial appendage occluder according to claim 1, characterized in that: The marking portion (5) is a scale mark.

3. The delivery handle of the left atrial appendage occluder according to claim 1, characterized in that: The cushion portion (621) is clamped between the outer one of the proximal handle portion (1) and the distal handle portion (2) and the inner shell (62), and the cushion portion (621) abuts against the inner wall surface of the inner shell (62) in the radial direction.

4. The delivery handle of the left atrial appendage occluder according to claim 1, characterized in that: The shell wall of the inner shell (62) is provided with a notch at a position corresponding to the pressing piece (622) in the radial direction, and the handle wall of one of the proximal handle (1) and the distal handle (2) located on the outside is provided with a hole-shaped or groove-shaped avoidance portion (21) at a position corresponding to the pressing piece (622) in the radial direction.

5. The delivery handle of the left atrial appendage occluder according to claim 1, characterized in that: The outer shell (63) comprises an outer cylinder portion (631) and an inner cylinder portion (632) which are connected to each other; the stop fitting portion (631a) is arranged on the outer cylinder portion (631); the inner cylinder portion (632) can abut against the cushion portion (621) along the axial direction; the elastic member (64) is a spring; and the spring sleeve is installed on the inner cylinder portion (632).

6. The delivery handle of the left atrial appendage occluder according to any one of claims 1 to 5, characterized in that: The proximal cable (3) is sheathed on the distal cable (4), and a reinforcement tube (41) is installed on a portion of the sheath of the distal cable (4) close to the distal handle (2).

7. The delivery handle according to any one of claims 1 to 5, characterized in that: The proximal cable (3) is sheathed on the distal cable (4), and the locking mechanism (6) comprises a damping portion; The damping portion is provided between the proximal cable (3) and the distal cable (4); and / or the damping portion is provided between the proximal handle (1) and the distal handle (2).

8. The delivery handle of the left atrial appendage occluder according to any one of claims 1 to 5, characterized in that: At least one of the proximal handle (1) and the distal handle (2) comprises a main handle (11) and a cover cap (12) which are separately arranged in the axial direction; the cover cap (12) is cylindrical, and its inner wall is provided with reinforcing ribs (121) extending in the radial direction for fixing a connecting tube (122); the connecting tube (122) is used for installing the proximal cable (3) or the distal cable (4).

9. A delivery system for a left atrial appendage occluder, comprising a guide assembly (7) and a loading assembly (8), wherein the loading assembly (8) is used to accommodate the left atrial appendage occluder (9), and is characterized in that: It also includes a delivery handle, which is the delivery handle of the left atrial appendage occluder according to any one of claims 1-8.

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