Sealing member, tube body connector and thrombectomy system

Abstract

The utility model relates to a sealing component, a tube body connector and a thrombectomy system, the sealing component comprises a body, a density gasket and a furling part, and the body is provided with a first cavity; the sealing gasket is arranged in the first cavity, and an opening capable of being opened and closed is formed in the sealing gasket; the folding part is connected with one end of the body, the folding part is provided with a second cavity, and the second cavity and the first cavity are coaxial; in a natural state, the second cavity is in an open state, the folding part can be folded in the radial direction, and when the folding part changes to the folded state in the radial direction, the second cavity changes to a sealed state. The sealing component can provide continuous sealing and is good in sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a sealing member, a tube connector and an embolus extraction system. Background Art

[0002] The information provided in this part is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] In recent years, interventional therapy has been increasingly widely used in the cardiovascular field. To prevent blood from flowing out, a sealing member is indispensable in interventional surgery.

[0004] Existing sealing members usually use sealing rings. When in use, the interventional instrument passes through the sealing ring and is clamped by the sealing ring. However, when the interventional instrument is withdrawn, at the moment of withdrawal, it is difficult to achieve sealing and blood may spurt out, which will bring inconvenience and risks to the surgery.

[0005] Therefore, there is a practical need for an improved sealing member. Summary of the Utility Model

[0006] Based on this, it is necessary to provide a sealing member with better sealing performance.

[0007] A sealing member includes:

[0008] A body having a first cavity;

[0009] A sealing gasket disposed in the first cavity, and an opening that can be opened and closed is formed on the sealing gasket;

[0010] A converging portion connected to one end of the body, and the converging portion has a second cavity that is coaxial with the first cavity; in the natural state, the second cavity is in an open state, the converging portion can converge in the radial direction, and when the state of the converging portion changes to converge in the radial direction, the second cavity changes to a sealed state.

[0011] In one embodiment, a first slit and a second slit are formed on the sealing gasket, and the first slit and the second slit intersect;

[0012] The thicknesses of the first slit and the second slit both penetrate the thickness of the sealing gasket, thereby forming the opening; or,

[0013] The thicknesses of the first slit and the second slit do not penetrate the thickness of the sealing gasket, and the first slit and the second slit form the opening that penetrates the thickness of the sealing gasket at the intersection.

[0014] In one embodiment, the sealing gasket is circular, the first slit and the second slit intersect at the center of the sealing gasket. When the thicknesses of both the first slit and the second slit penetrate the thickness of the sealing gasket, the lengths of the first slit and the second slit are at least equal to 50% of the diameter of the sealing gasket.

[0015] In one embodiment, the sealing gasket includes a plurality of fan-shaped sealing pieces. The arc-shaped edge of each sealing piece is connected to the inner wall of the first cavity. Moreover, the two straight edges of each sealing piece abut against the straight edges of adjacent sealing pieces but are not fixedly connected, thereby forming the openable and closable opening.

[0016] In one embodiment, a plurality of cutting grooves are provided on the converging portion. The plurality of cutting grooves divide the converging portion into a plurality of partition members. In the natural state, the plurality of partition members are circumferentially spaced apart. When the converging portion converges in the radial direction, adjacent partition members overlap in the radial direction, causing the second cavity to change to a sealed state.

[0017] In one embodiment, the openings of the cutting grooves are located on the side surface of the converging portion. The cutting grooves extend from the side surface of the converging portion towards the body in the depth direction, and extend from the inner wall of the converging portion towards the side surface of the converging portion in the radial direction. Moreover, a side opening is formed on one side of the cutting groove away from the side surface of the converging portion, enabling the cutting groove to communicate with the second cavity.

[0018] In one embodiment, the bottom of the cutting groove is in the same plane as the sealing gasket.

[0019] In one embodiment, a plurality of protrusions are provided on the outer wall of the body, which are evenly spaced or unevenly spaced in the circumferential direction. The axial length of each protrusion is equal to or different from the axial length of the body.

[0020] A pipe connector includes a connecting body, a locking member, and the above-mentioned sealing member. The locking member has an installation cavity, and the sealing member is received in the installation cavity. The locking member is detachably assembled with the connecting body to dispose the sealing member between the connecting body and the locking member; when the locking member is assembled with the connecting body but not locked, the opening of the sealing gasket is in a closed state, and the converging portion is in an open state. When the locking member is locked, the sealing member is squeezed, and the converging portion converges radially.

[0021] In one embodiment, an abutment portion is provided on the side of the locking member away from the connecting body, and the abutment portion is used to cooperate with the connecting body to squeeze or not squeeze the sealing member. The side of the abutment portion facing the installation cavity is an annular wedge surface, and the angle between the annular wedge surface and the axis of the locking member is greater than or equal to 60° and less than 90°.

[0022] A thrombus removal system comprises: a first push tube, a second push tube, a delivery sheath, a thrombus removal bracket and the above-mentioned tube body connector, the proximal end of the delivery sheath is connected to the distal end of the tube body connector, the first push tube can be movably passed through the tube body connector and the delivery sheath, the second push tube can be movably passed through the first push tube, the proximal end of the thrombus removal bracket is connected to the distal end of the second push tube, and the thrombus removal bracket can be movably passed through the tube body connector and the delivery sheath driven by the first push tube, and the closing portion is radially closed and holds the first push tube by locking the locking piece.

[0023] In one embodiment, the thrombus removal system further includes a suction device, and the suction device is connected to and communicated with the connection body.

[0024] The sealing component includes a body, a sealing gasket and a retracting portion. The sealing gasket is formed with an openable and closable opening. When in use, the external component can open the opening and then penetrate the sealing gasket and be wrapped by the sealing gasket, thereby forming a primary seal; the retracting portion can be retracted in the radial direction. After the external component penetrates the second cavity, the retracting portion is retracted and tightly embraces the external component, so that the second cavity is sealed, thereby forming a secondary seal. Moreover, at the moment when the external component is withdrawn, the opening of the sealing gasket can be closed to achieve continuous sealing. Therefore, the sealing performance of the sealing component is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] in:

[0027] Figure 1 is a schematic structural diagram of a thrombus removal system according to an embodiment;

[0028] Figure 2 is an exploded schematic diagram of a pipe body connector according to an embodiment;

[0029] Figure 3 for Figure 2Cross-sectional view of the pipe connector shown with the sealing member omitted;

[0030] Figure 4 Schematic structural view of the sealing member of an embodiment;

[0031] Figure 5 Along Figure 4 Cross-sectional view taken along line A-A of;

[0032] Figure 6 For Figure 4 Schematic structural view of the sealing member shown from another angle;

[0033] Figure 7 For Figure 4 Schematic structural view of the sealing member shown from another angle. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0035] In the description of the embodiments of the present utility model, it should be noted that terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a replaceable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0037] In the field of interventional medical devices, generally, the end of a medical device implanted into the human body or animal body that is closer to the operator is called the "proximal end", and the end that is farther from the operator is called the "distal end". Based on this principle, the "proximal end" and "distal end" of any component of the medical device are defined. The "axial direction" generally refers to the length direction of the medical device when it is being delivered, and the "radial direction" generally refers to the direction of the medical device that is not perpendicular to its "axial direction". Based on this principle, the "axial direction" and "radial direction" of any component of the medical device are defined. The "circumferential direction" refers to the circumferential direction, that is, the direction around the axis of the lumen structure or cylinder.

[0038] Please refer to Figure 1 , a thrombectomy system 1 according to an embodiment includes a first push tube (not shown in the figure), a second push tube 100, a delivery sheath 200, a thrombectomy stent 300, and a tube connector 400. The proximal end of the delivery sheath 200 is connected to the distal end of the tube connector 400, and the distal end of the second push tube 100 is connected to the proximal end of the thrombectomy stent 300. The thrombectomy stent 300 has a radially expanded state and a radially contracted state. The second push tube 100 is movably inserted through the first push tube, and the first push tube is movably inserted through the tube connector 400 and the delivery sheath 200, so as to drive the thrombectomy stent 300 to be received in the inner cavity of the delivery sheath 200 or be released from the inner cavity of the delivery sheath 200 to the target position.

[0039] Please refer to Figure 2 , the tube connector 400 includes a connection body 410, a locking member 420, and a sealing member 430. The sealing member 430 is disposed between the connection body 410 and the locking member 420, and the locking member 420 and the connection body 410 cooperate with each other to realize the pressing and fixing of the sealing member 430 and the state adjustment of the sealing member 430.

[0040] The connection body 410 has a proximal opening 411 and a distal opening 412 that communicate with each other. The proximal opening 411 and the distal opening 412 are located at axially opposite ends. The proximal end of the delivery sheath 200 is connected to the distal opening 412 of the connection body 410, and the inner cavity of the delivery sheath 200 communicates with the distal opening 412.

[0041] In one embodiment, an external thread 413 is provided at one end of the connection body 410 close to the proximal opening 411. The locking member 420 is assembled at the proximal opening 411 of the connection body 410. The locking member 420 and the connection body 410 are detachably connected through the external thread 413.

[0042] In one embodiment, the locking member 420 is integrally in the shape of a hollow cylinder.

[0043] In one embodiment, the locking member 420 has an installation cavity 421 for receiving the sealing member 430. When the locking member 420 is connected to the connection body 410, the sealing member 430 is received in the installation cavity 421.

[0044] Please refer to Figure 2 and Figure 3 , an internal thread 422 is provided on the inner side wall of the installation cavity 421. One end of the locking member 420 close to the installation cavity 421 is provided with an abutting portion 423, and a through hole 424 communicating with the installation cavity 421 is opened on the abutting portion 423, so that an external member (for example, the first push tube) can pass through the locking member 420 and the sealing member 430 through the through hole 424. The abutting portion 430 is used to cooperate with the connection body 410 to squeeze the sealing member 430 when the locking member 420 is locked on the connection body 410, so that the sealing member 430 is deformed to seal the proximal opening 411. Moreover, the radial width of the through hole 424 is smaller than the radial width of the sealing member 430, so that the abutting portion 423 can prevent the sealing member 430 from coming out of the proximal end of the installation cavity 421.

[0045] In one embodiment, the side of the abutting portion 423 close to the installation cavity 421 is an annular wedge surface, and the proximal side of the annular wedge surface is the small end and the distal side is the large end. It should be noted that the annular wedge surface is the inner surface of a frustum structure.

[0046] The connection body 410 makes the locking member 420 and the connection body 410 detachably connected and adjusts the locking degree of the locking member 420 through the mutual cooperation of the external thread 413 and the internal thread 422.

[0047] In one embodiment, a limiting ring 414 is further provided at the proximal end of the connection body 410, and the limiting ring 414 is located at the distal end of the external thread 413. The locking member 420 is further provided with a limiting protrusion 425 and a transition cavity 426, and both the limiting protrusion 425 and the transition cavity 426 are located at the distal end of the installation cavity 421. The limiting protrusion 425 is located on the inner wall at the distal end of the transition cavity 426. The transition cavity 426 has a distal opening and is communicated with the installation cavity 421. The outer diameter of the limiting ring 414 is larger than the inner diameter of the limiting protrusion 425, but the limiting ring 414 can squeeze the limiting protrusion 425 and enter the transition cavity 426, and is axially limited by the limiting protrusion 425 and cannot come out of the locking member 420 without being subjected to a tensile force.

[0048] During assembly, after the limiting ring 414 presses against the limiting protrusion 425 and extends into the transition cavity 426, it is limited by the limiting protrusion 425, so that when the locking member 420 is loosened, the locking member 420 is always in a connected state with the connection body 410, preventing the locking member 420 from falling off. If the locking member 420 falls off, the proximal opening 411 of the connection body 410 will be in a fully open state, which may cause a relatively large amount of blood to flow out instantly during the fall, thus posing a health risk to the patient and prolonging the operation time. Preventing the locking member 420 from falling off is beneficial to improving the surgical safety and reducing the operation time.

[0049] Please also refer to Figure 4 , the sealing member 430 includes a body 431, a sealing gasket 432, and a converging portion 433.

[0050] As Figure 5 shown, the body 431 has a first cavity 4311. The first cavity 4311 has two axially opposite openings. The sealing gasket 432 is disposed in the first cavity 4311 for sealing the first cavity 4311. An openable and closable opening is formed on the sealing gasket 432.

[0051] As Figure 6 shown, in one embodiment, the sealing gasket 432 is provided with a first slit 4321 and a second slit 4322, and the first slit 4321 and the second slit 4322 intersect. The thicknesses of the first slit 4321 and the second slit 4322 both penetrate through the thickness of the sealing gasket 432, thereby forming an opening. In the natural state, the opening is in a closed state. This enables the sealing gasket 432 to seal the first cavity 4311 to a certain extent. When an external component (for example, the first push tube) is to be passed through the first cavity 4311, the external component pushing against the sealing gasket 432 will cause the opening to open, facilitating the passage of the external component.

[0052] The thicknesses of the first slit 4321 and the second slit 4322 both penetrate through the thickness of the sealing gasket 432, thereby dividing the sealing gasket 432 into a plurality of circumferentially distributed sealing pieces 4323. The first slit 4321 and the second slit 4322 are the edges of each sealing piece 4323. In the natural state, the first slit 4321 and the second slit 4322 are in a state of abutment, thus closing the opening. When pushed by an external component, the first slit 4321 and the second slit 4322 no longer abut, causing the opening to open. That is, it is poked open by the external component. For the sealing gasket 432 with this structure, when the external component passes through, the frictional force received is small, facilitating the passage.

[0053] In one embodiment, the sealing gasket 432 is circular, and the first slit 4321 and the second slit 4322 intersect at the center of the sealing gasket 432. Moreover, the lengths of the first slit 4321 and the second slit 4322 are at least equal to 50% of the diameter of the sealing gasket 432 to facilitate the penetration of an external component.

[0054] In one embodiment, the lengths of the first slit 4321 and the second slit 4322 are at least equal to 90% of the diameter of the sealing gasket 432 to reduce the frictional force and more facilitate the penetration of an external component.

[0055] In another embodiment, the thicknesses of neither the first slit 4321 nor the second slit 4322 penetrate the thickness of the sealing gasket 432, but the first slit 4321 and the second slit 4322 form an opening penetrating the sealing gasket 432 at the intersection. Similarly, in the natural state, the first slit 4321 and the second slit 4322 abut at the intersection, making the opening in a closed state. When pushed by an external component, the first slit 4321 and the second slit 4322 no longer abut at the opening, causing the opening to open. That is, it is poked open by the external component. When an external component penetrates, the sealing gasket 432 with this structure can better wrap the external component and has better sealing performance.

[0056] It should be noted that regardless of whether the first slit 4321 and the second slit 4322 penetrate the thickness of the sealing gasket 432, in other embodiments, the number of slits on the sealing gasket 432 is not limited to two. For example, it may also include a third slit, a fourth slit, etc.

[0057] In the embodiment including the first slit 4321 and the second slit 4322, the sealing gasket 432 and the body 431 are of an integral structure.

[0058] In another embodiment, the sealing gasket 432 and the body 431 are not of an integral structure. The sealing gasket 432 includes a plurality of fan-shaped sealing pieces 4323. The arc-shaped edges of each sealing piece 4323 are connected to the inner wall of the first cavity 4311. The plurality of sealing pieces 4323 are circumferentially distributed, thereby forming a circular sealing gasket 432 with an area equal to the cross-sectional area of the first cavity 4311. Moreover, the two straight edges of each sealing piece 4323 abut against the straight edges of the adjacent sealing pieces 4323 but are not fixedly connected, thereby forming an opening that can be opened and closed.

[0059] In one embodiment, there is one sealing gasket 432. In another embodiment, there may be a plurality of sealing gaskets 432. For example, there are two sealing gaskets 432, and the two sealing gaskets 432 are arranged at intervals or without intervals in the first cavity 4311.

[0060] Please refer to Figure 4 and Figure 5The retracted portion 433 is connected to one end of the body 431, and the retracted portion 433 has a second cavity 4331, and the second cavity 4331 has two axially opposite openings. The second cavity 4331 is coaxial with the first cavity 4311. In a natural state, the second cavity 4331 is in an open state, and the external component can pass through the retracted portion 433 and the sealing gasket 432 in sequence. The retracted portion 433 can be retracted in the radial direction. When the retracted portion 433 changes to a radially retracted state, the second cavity 4331 changes to a sealed state, thereby hugging the outer wall of the external component.

[0061] In one embodiment, the gathering portion 433 is provided with a plurality of grooves 4332, and the plurality of grooves 4332 divide the gathering portion 433 into a plurality of partitions 4333. In a natural state, the plurality of partitions 4333 are spaced apart in the circumferential direction. When the gathering portion 433 is squeezed, adjacent partitions 4333 overlap in the radial direction to close the second cavity 4331. The arrangement of the grooves 4332 enables adjacent partitions 4333 to overlap in the radial direction when the gathering portion 433 is squeezed, so that the gathering portion 433 is in a radially gathered state. When the external component penetrates the second cavity 4331, the plurality of partitions 4333 overlapping in the radial direction can hug the surface of the external component and seal the second cavity 4331.

[0062] By adjusting the degree of radial overlap of the plurality of partitions 4333 , the plurality of clamping members 4333 of the gathering portion 433 can clamp external components with different outer diameters, thereby improving the sealing performance and achieving better versatility.

[0063] Please also read Figure 7 In one embodiment, the gathering portion 433 has a truncated cone-shaped profile, and the end of the gathering portion 433 with a larger bottom area is connected to the body 431. The opening of the slot 4332 is located on the side of the gathering portion 433. The slot 4332 extends from the side of the gathering portion 433 to the body 431 in the depth direction, and extends from the inner wall of the gathering portion 433 to the side close to the gathering portion 433 in the radial direction. In addition, a side opening is formed on the side of the slot 4332 away from the side of the gathering portion 433, so that the slot 4332 is connected to the second cavity 4331. The slot 4332 configured in this way can, on the one hand, enable the plurality of partitions 4333 to hug or cling to the external component that penetrates the second cavity 4331 when the gathering portion 433 is squeezed; on the other hand, it can improve the expansion performance of the gathering portion 433, which is beneficial to the expansion of the gathering portion 433, thereby facilitating the penetration of external components (such as a dilator, a first push tube, etc.).

[0064] During the assembly process of the locking member 420 and the connection body 410, when the locking member 420 is rotated to move the locking member 420 in the locking trend direction, the connection body 410 forces the entire sealing member 430 to move towards the abutting portion 423. Under the blockage of the abutting portion 423, the converging portion 433 forces the cutting groove 4332 to contract, and the converging portion 433 converges radially. The multiple separating members 4333 overlap radially to tightly hold the externally inserted member. Moreover, the radial convergence of the converging portion 433 can drive the multiple sealing pieces 4323 of the sealing gasket 432 to approach each other radially and tightly adhere to the externally inserted member. That is, the first slit 4321 and the second slit 4322 of the sealing gasket 432 are misaligned to improve the sealing performance.

[0065] When the locking member 420 is rotated to move the locking member 420 in the loosening trend direction, the converging portion 433 changes from the radially converged state to the radially expanded state.

[0066] The sealing member 430 is made of an elastic material such as silica gel, rubber, or elastic plastic, making the sealing member 430 easy to be extruded and able to return to its original state after being extruded.

[0067] In one embodiment, the angle between the annular wedge-shaped surface of the abutting portion 423 and the axis of the locking member 420 is greater than or equal to 60° and less than 90°. The angle being less than 90° makes it such that when the connection body 410 pushes the entire sealing member 430 to move towards the abutting portion 423 and the sealing member 430 is axially extruded by the blockage of the abutting portion 423, on the one hand, it is beneficial for the converging portion 433 to converge radially, and the multiple separating members 4333 overlap radially to tightly hold the externally inserted member; on the other hand, it is beneficial for driving the multiple sealing pieces 4323 of the sealing gasket 432 to approach each other radially and tightly adhere to the externally inserted member. The angle being greater than or equal to 60° is beneficial for avoiding the situation where, when the locking member 420 is overly tightened, the multiple separating members 4333 overlap radially excessively and partially protrude from the through hole 424, resulting in the sealing member 430 not being able to automatically return to the natural state after the locking member 420 is loosened. Thus, the operation is convenient and the sealing effect is good.

[0068] It should be noted that, in the above embodiment, the sealing member 430 is used in cooperation with the connection body 410 and the locking member 420 of the pipe connector 400. By adjusting the degree of axial extrusion of the sealing member 430 by the connection body 410 and the locking member 420, the opening or closing of the second cavity 4331 of the sealing member 430 is achieved. In other embodiments, it can also be used in cooperation with other joint structures to adjust the degree of radial extrusion of the sealing member 430 to achieve the opening or closing of the second cavity 4331 of the sealing member 430.

[0069] Such as Figure 7As shown, in one embodiment, the cut groove 4332 is not communicated with the end face of the main body 431 close to the side of the connecting main body 410. Such a setting of the cut groove 4332 can effectively avoid the phenomenon that the sealing member 430 is split from the cut groove 4332 when an external member with a larger outer diameter is inserted, thereby effectively ensuring the stability of the sealing member 430 and enabling the operation to proceed smoothly.

[0070] In one embodiment, the bottom of the cut groove 4332 is on the same plane as the sealing gasket 432, so that the radial contraction of the contraction part 433 can better drive the multiple sealing pieces 4323 of the sealing gasket 432 to approach in the radial direction, thereby better realizing two-stage sealing.

[0071] When there are multiple sealing gaskets 432, one of the sealing gaskets 432 is on the same plane as the bottom of the cut groove 4332, and the remaining sealing gaskets 432 are located at the distal end of the sealing gasket 432 that is on the same plane as the bottom of the cut groove 4332.

[0072] It should be noted that in other embodiments, the bottom of the cut groove 4332 does not necessarily have to be on the same plane as the sealing gasket 432, and the sealing gasket 432 can be farther away from the proximal opening of the second cavity 4331 than the bottom of the cut groove 4332. In this way, two-stage sealing and continuous sealing can also be achieved, and it is convenient for external members to be inserted.

[0073] Please return to Figure 6 , in one embodiment, a plurality of protrusions 4312 are arranged on the outer wall of the main body 431 of the sealing member 430 at circumferentially spaced intervals. By providing the protrusions 4312, after the sealing member 430 is placed in the installation cavity 421, there is a gap between the outer surface of the main body 431 and the inner side wall of the installation cavity 421, and thus there is an expansion space for the sealing member 430 after it is placed in the installation cavity 421, which is convenient for an external member with a larger outer diameter to penetrate into the tube connector 400.

[0074] In one embodiment, the plurality of protrusions 4312 are evenly spaced along the circumference of the main body 431, and the axial length of each protrusion 4312 is equal to the axial length of the main body 431. Thus, when the outer diameter of the external member is large, the sealing member 430 can be evenly stressed during radial expansion, so as to facilitate the radial expansion of the sealing member 430 and it is not easily split.

[0075] It should be noted that, in other embodiments, the plurality of protrusions 4312 may be distributed at non-uniform intervals along the circumference of the body 431, and the axial length of each protrusion 4312 may not be equal to the axial length of the body 431. Regardless of whether the plurality of protrusions 4312 are evenly distributed at intervals along the circumference of the body 431, and whether the axial length of each protrusion 4312 is equal to the axial length of the body 431, providing a plurality of protrusions 4312 distributed at intervals along the circumference of the body 431 on the surface of the body 431 can provide space for the sealing member 430 to expand radially.

[0076] When the device is to be implanted, for example, the implantation of the thrombus removal stent 300, by adjusting the locking degree of the locking member 420 to adjust the radial contraction degree of the plurality of partitions 4333, the opening degree of the second cavity 4331 can be adjusted, so that it is easier to pass the first push tube through the tube body connector 400 to deliver the thrombus removal stent 300 to the target position through the delivery sheath 200. In addition, during the thrombus removal process, the closing degree of the second cavity 4331 can be adjusted according to the outer diameter of the first push tube, so that the friction between the contraction portion 433 and the first push tube is small, so that the first push tube can slide axially smoothly to smoothly perform the thrombus removal operation. In this process, in order to reduce the friction, although the contraction portion 433 is not overly tightly fitted with the outer surface of the first push tube, the sealing gasket 432 and the contraction portion 433 together provide a two-level seal, so that the sealing performance during the thrombus removal process is better, which is conducive to avoiding or slowing down the occurrence of blood leakage. Moreover, when the first push tube and the thrombus removal bracket 300 are withdrawn, the opening of the sealing gasket 432 is closed, thereby achieving sealing. Compared with the density ring, the sealing performance is better, and the phenomenon of blood spraying at the moment of withdrawal is avoided.

[0077] Therefore, the sealing performance of the sealing component 430 is good, and it can provide continuous sealing during the operation, and it is convenient for external components to be inserted and easy to operate.

[0078] The tubular connector 400 includes a sealing member 430, so that the external member can be easily inserted into the tubular connector 400, and it is not easy to cause bleeding after insertion, and it is not easy to cause a large amount of blood to spray out at the moment of withdrawal.

[0079] The thrombus removal system 1 uses the above-mentioned tube connector 400 to connect with the delivery sheath 200, which has good sealing performance and is easy to operate.

[0080] Please go back Figure 1 In one embodiment, the thrombus removal system 1 further includes a suction device 500. Figure 2, a side opening 415 is further provided on the connecting body 410, and the side opening 415 communicates with the proximal opening 411 and the distal opening 412. The suction device 500 is connected to the side opening 415 and is used to suck the fine thrombi, free fine thrombi and newly generated thrombi generated during the thrombectomy process, and discharge the thrombi out of the body, effectively avoiding the residual of fine thrombi in the blood vessel, thereby reducing the probability of re - formation of thrombi due to the residual of fine thrombi on the inner wall of the blood vessel.

[0081] Moreover, during the thrombectomy process, the simultaneous use of the suction device 500 for suction is beneficial to avoid the overflow of blood from the proximal end of the tube connector 400. The suction device 500 is used in combination with the tube connector 400 including the sealing member 430, which improves the sealing performance of the thrombectomy system 1, thus facilitating the smooth progress of the operation and improving the safety of the operation.

[0082] The technical features of the above - described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above - described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0083] The above - disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A sealing member, characterized in that, Comprising: A body having a first cavity; A sealing gasket disposed in the first cavity, and an openable and closable opening is formed on the sealing gasket; A converging portion connected to one end of the body, and the converging portion has a second cavity which is coaxial with the first cavity; In the natural state, the second cavity is in an open state, and the converging portion can converge in the radial direction. When the state of the converging portion changes to converge in the radial direction, the second cavity changes to a sealed state.

2. The sealing member according to claim 1, characterized in that, A first slit and a second slit are formed on the sealing gasket, and the first slit and the second slit intersect; The thicknesses of the first slit and the second slit both penetrate through the thickness of the sealing gasket, thereby forming the opening; Or, The thicknesses of the first slit and the second slit do not penetrate through the thickness of the sealing gasket, and the first slit and the second slit form the opening penetrating through the thickness of the sealing gasket at the intersection.

3. The sealing member according to claim 2, wherein The sealing gasket is circular, and the first slit and the second slit intersect at the center of the sealing gasket. When the thicknesses of the first slit and the second slit both penetrate through the thickness of the sealing gasket, the lengths of the first slit and the second slit are at least equal to 50% of the diameter of the sealing gasket.

4. The sealing member according to claim 1, characterized in that, The sealing gasket includes a plurality of fan-shaped sealing pieces. The arc-shaped edge of each sealing piece is connected to the inner wall of the first cavity, and the two straight edges of each sealing piece abut against but are not fixedly connected to the straight edges of the adjacent sealing pieces, thereby forming the openable and closable opening.

5. The sealing member according to claim 1, characterized in that, A plurality of cutting grooves are provided on the converging portion. The plurality of cutting grooves divide the converging portion into a plurality of partition members. In the natural state, the plurality of partition members are spaced apart in the circumferential direction. When the converging portion converges in the radial direction, the adjacent partition members overlap in the radial direction, causing the second cavity to change to a sealed state.

6. The sealing member according to claim 5, wherein The opening of the cutting groove is located on the side surface of the converging portion. The cutting groove extends from the side surface of the converging portion towards the body in the depth direction, and extends from the inner wall of the converging portion towards the side surface of the converging portion in the radial direction. Moreover, a side opening is formed on one side of the cutting groove away from the side surface of the converging portion, so that the cutting groove communicates with the second cavity.

7. The sealing member according to claim 5, characterized in that, The bottom of the cutting groove is in the same plane as the sealing gasket.

8. The sealing member according to claim 1, characterized in that A plurality of protrusions are provided on the outer wall of the body and are evenly spaced or unevenly spaced in the circumferential direction. The axial length of each protrusion is equal to or unequal to the axial length of the body.

9. A pipe connector, characterized in that, Comprising a connecting body, a locking member and the sealing member according to any one of claims 1 to 8. The locking member has an installation cavity, and the sealing member is received in the installation cavity. The locking member is detachably assembled with the connecting body to dispose the sealing member between the connecting body and the locking member; when the locking member is assembled with the connecting body but not locked, the opening of the sealing gasket is in a closed state, and the converging portion is in an open state. When the locking member is locked, the sealing member is squeezed, and the converging portion converges radially.

10. The tubular connector according to claim 9, characterized in that, An abutment portion is provided on the side of the locking member away from the connecting body, and the abutment portion is used to cooperate with the connecting body to squeeze or not squeeze the sealing member. The side of the abutment portion facing the installation cavity is an annular wedge surface, and the angle between the annular wedge surface and the axis of the locking member is greater than or equal to 60° and less than 90°.

11. A thrombectomy system, characterized in that, include: A first push tube, a second push tube, a delivery sheath, a thrombus retrieval bracket and a tube body connector as described in claim 9, wherein the proximal end of the delivery sheath is connected to the distal end of the tube body connector, the first push tube can be movably passed through the tube body connector and the delivery sheath, the second push tube can be movably passed through the first push tube, the proximal end of the thrombus retrieval bracket is connected to the distal end of the second push tube, and the thrombus retrieval bracket can be movably passed through the tube body connector and the delivery sheath driven by the first push tube, and the closing portion is radially closed and holds the first push tube by locking the locking piece.

12. The thrombectomy system according to claim 11, wherein, The thrombus removal system further includes a suction device, which is connected to and communicated with the connection body.

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