Catheter connector, conveying assembly and thrombectomy system

Abstract

The invention relates to a catheter connector, a conveying assembly and a thrombectomy system, and the catheter connector comprises a connector body which is provided with an axial through main channel; the number of the first sealing assemblies is at least one, and the first sealing assemblies are connected with one end of the connector body and used for sealing the main channel; and the second sealing assembly is connected with the end, away from the connector body, of the first sealing assembly, and the second sealing assembly is used for sealing the main channel again. According to the catheter connector, the first sealing assembly and the second sealing assembly are arranged at one end of the connector body, at least double sealing is conducted on the near end opening of the main channel, and when the interior of the main channel is in a negative pressure environment, the at least double sealing assemblies can effectively prevent external air from being pressed into the main channel; therefore, the negative pressure environment in the main channel can be prevented from being damaged, the sealing performance is effectively improved, and the phenomenon of blood leakage or air leakage in clinical operation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a catheter connector, a delivery assembly and a thrombus removal system. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Interventional therapy has become an effective and important treatment for acute pulmonary embolism. Currently, interventional therapy for acute pulmonary embolism mainly includes catheter thrombolysis and catheter-based thrombus removal / resection. Both treatment methods require the establishment of a vascular channel with the human body through a catheter or sheath, and the treatment device is inserted into the lesion through the established vascular channel for treatment.

[0004] In order to ensure the smooth progress of interventional treatment and prevent blood or saline from being discharged from the opening of the catheter connector along the vascular channel, the opening of the catheter connector needs to be effectively sealed. In addition, during the thrombus removal process, in order to avoid residual small thrombi after thrombus removal, a suction device is usually connected to the catheter connector to extract and discharge the small thrombi from the body through negative pressure suction.

[0005] Most of the existing catheter connectors achieve sealing with interventional treatment devices through simple sealing rubber rings. With such a sealing structure, during the process of aspirating thrombus with a suction device, since the blood vessel channel is in a negative pressure environment, the sealing structure is mostly made of flexible materials and has insufficient supporting force, which can easily lead to the opening on the sealing structure for the interventional treatment device to be opened by external air pressure, allowing external air to enter the blood vessel channel, destroying the negative pressure environment and further affecting the suction effect. Summary of the invention

[0006] Based on this, it is necessary to provide a catheter connector with good negative pressure sealing performance.

[0007] Furthermore, a conveying component with good negative pressure sealing performance is also provided.

[0008] Furthermore, a thrombus removal system with good negative pressure sealing performance is also provided.

[0009] A catheter connector comprises: a connector body having a main channel extending axially therethrough; at least one first sealing assembly, the first sealing assembly being connected to one end of the connector body and used for sealing the main channel; and a second sealing assembly being connected to an end of the first sealing assembly away from the connector body and used for resealing the main channel.

[0010] In one embodiment, a first clamping portion is provided on the joint body near one side of the first sealing assembly. The first sealing assembly includes: a first seal, having a first opening axially penetrating therethrough; and a first gland, having a first perforation axially penetrating therethrough. The first gland is clamped to the first clamping portion to press the first seal tightly against the joint body.

[0011] In one embodiment, a first embedding groove is provided on the end surface of the joint body facing the first seal. The first seal includes a first sealing portion and a first embedding portion connected to the first sealing portion. The first embedding portion is at least partially embedded in the first embedding groove to preliminarily fix the first seal.

[0012] In one embodiment, the first opening is provided on the first sealing portion. A first positioning post is provided on one of the end surface of the joint body facing the first sealing portion and the first sealing portion, and a first positioning hole is provided on the other. The first positioning post extends axially toward the first sealing portion and extends into the first positioning hole.

[0013] In one embodiment, the first gland includes a first pressing portion and a first clamping post connected to the first pressing portion. A plurality of the first clamping posts are provided, and the plurality of first clamping posts are circumferentially spaced apart. The plurality of first clamping posts are all clamped to the first clamping portion so that the first pressing portion presses the first seal.

[0014] In one embodiment, a plurality of clamping protrusions are provided on the first clamping portion and are circumferentially spaced apart along it. A clamping hole axially penetrating therethrough is provided on each of the first clamping posts. Each of the first clamping posts is clamped to the distal end surface of the first clamping portion, and the clamping protrusion penetrates through the clamping hole.

[0015] In one embodiment, the second sealing assembly includes: a second seal, having a second opening axially penetrating therethrough; and a second gland, having a second perforation axially penetrating therethrough. The second gland is clamped to the first pressing portion to press the second seal tightly against the end surface of the first pressing portion facing the second seal.

[0016] In one embodiment, the projection of the first opening on the second seal does not overlap with the second opening.

[0017] In one embodiment, a second embedding groove is provided on the end surface of the first pressing portion facing the second seal. The second seal includes a second sealing portion and a second embedding portion connected to the second sealing portion. The second embedding portion is at least partially embedded in the second embedding groove to preliminarily fix the second seal.

[0018] In one embodiment, the second opening is provided on the second sealing portion, and a second positioning post is provided on one of the end faces of the first pressing portion facing the second sealing portion and the second sealing portion, and a second positioning hole is formed in the other one. The second positioning post extends axially toward the second sealing portion and extends into the second positioning hole.

[0019] In one embodiment, the second gland comprises a second pressing portion and second clamping posts connected to the second pressing portion. A plurality of the second clamping posts are provided, and the plurality of second clamping posts are circumferentially spaced apart. The plurality of second clamping posts are all clamped with the first clamping portion so that the second pressing portion presses the second sealing member.

[0020] A delivery assembly includes: the catheter connector and a delivery sheath as described above, and the delivery sheath is connected to an end of the connection body away from the first sealing assembly.

[0021] An embolus removal system includes the delivery assembly as described above, an embolus removal stent, and a reinforcing tube connected to the proximal end of the embolus removal stent. The embolus removal stent can movably pass through the catheter connector and the delivery sheath driven by the reinforcing tube, and the reinforcing tube is sealed by the first sealing assembly and the second sealing assembly together.

[0022] In one embodiment, the embolus removal system further includes a suction device connected to the joint body of the catheter connector, and the inner cavity of the delivery assembly is sealed multiple times by the first sealing assembly and the second sealing assembly.

[0023] The catheter connector provided by the embodiment of the present invention is provided with a first sealing assembly and a second sealing assembly at one end of the joint body to perform at least two-layer sealing on the near port of the main channel. When the main channel is in a negative pressure environment, the at least two-layer sealing assembly can effectively prevent external air from being pressed into the main channel, so as to avoid the destruction of the negative pressure environment in the main channel. The catheter connector arranged in this way can effectively improve the sealing performance and avoid blood leakage or air leakage during clinical operations.

[0024] The delivery assembly provided by the embodiment of the present invention adopts the above catheter connector, which can effectively improve the sealing performance of the proximal side of the delivery assembly and avoid blood leakage during the operation.

[0025] The embolus removal system provided by the embodiment of the present invention adopts the above delivery assembly. When the suction assembly suctions, the delivery sheath can still be kept in a sealed state, so as to avoid the destruction of the negative pressure environment in the delivery sheath, improve the suction effect of the suction assembly, and reduce the residual amount of fine thrombus after embolus removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0027] in:

[0028] Figure 1 Detailed description of the invention The figure is an exploded view of a conveying assembly in one embodiment of the present invention.

[0029] Figure 2 FIG. 4 is a schematic diagram of the structure of a thrombus removal system according to an embodiment of the present invention.

[0030] Figure 3 Schematic diagram of a state where a dilator is inserted into a thrombectomy system according to an embodiment of the present invention.

[0031] Figure 4 FIG. 1 is a schematic structural diagram of a catheter connector according to an embodiment of the present invention.

[0032] Figure 5 For along Figure 4 Sectional view after cutting along the center cutting line AA.

[0033] Figure 6 FIG. 4 is an exploded view of a catheter connector according to an embodiment of the present invention.

[0034] Figure 7 Schematic diagram of the structure of the connector body in one embodiment of the present invention.

[0035] Figure 8 Schematic diagram of the structure of the first sealing member in one embodiment of the present invention.

[0036] Figure 9 Schematic diagram of a first structure of a first gland in an embodiment of the present invention.

[0037] Figure 10 Schematic diagram of the second structure of the first gland in one embodiment of the present invention.

[0038] Figure 11 FIG. 1 is a schematic structural diagram of a catheter connector in another embodiment of the present invention.

[0039] Figure 12 FIG. 4 is an exploded view of a catheter connector according to another embodiment of the present invention.

[0040] Figure 13 Schematic diagram of the structure of the second sealing member in one embodiment of the present invention.

[0041] Figure 14This is a schematic structural diagram of the second gland in an embodiment of the present invention.

[0042] Figure 15 This is a schematic structural diagram of the second gland in another embodiment of the present invention.

[0043] Figure 16 This is a schematic structural diagram of the second gland in another embodiment of the present invention. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the embodiments of the present invention, it should be noted that, as terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the embodiments of the present invention 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 thus cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "coupling" 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 invention can be understood according to specific situations.

[0047] In the field of interventional medical devices, generally, the end of the 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", and the "proximal end" and "distal end" of any component of the medical device are defined based on this principle. 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 parallel to its "axial direction", and the "axial direction" and "radial direction" of any component of the medical device are defined based on this principle. The "circumferential direction" refers to the circumferential direction, that is, the direction around the axis of the lumen structure or the cylinder.

[0048] Please refer toFigure 1 An embodiment of the present invention relates to a delivery assembly 10, which is mainly used to establish a blood vessel channel with the human body when removing pulmonary artery embolism, so that a treatment instrument can directly extend into the lesion position of the human body for treatment. Alternatively, it can also be used to assist in interventional or implant surgeries (for example, for a lumen capture system or for delivering other implantable instruments) to establish a blood vessel channel.

[0049] The delivery assembly 10 includes a catheter connector 1 and a delivery sheath 2. The catheter connector 1 has three interfaces (a, b, c). Among them, interface a and interface c are located at axially opposite ends, and interface a is located at the distal end, and interface c is located at the proximal end. Interface b is located on the side wall of the catheter connector 1, and interface b communicates with interface a and interface c. The delivery sheath 2 is connected to interface a at the distal most end of the catheter connector 1. The delivery sheath 2 is used to extend into a human blood vessel and establish a blood vessel channel.

[0050] Please refer to Figure 2 In one embodiment, the aforementioned delivery assembly 10 is used in a thrombectomy system 100 and is a part of the thrombectomy system 100. The thrombectomy system 100 further includes: a suction device 20, a thrombectomy stent 30, a reinforcing tube (not shown in the drawings), a catheter adapter 50, and a Y-valve 60. The reinforcing tube passes through the delivery assembly 10, and the distal end of the reinforcing tube is fixedly connected to the proximal end of the thrombectomy stent 30, and the proximal end of the reinforcing tube is fixedly connected to the distal end of the catheter adapter 50. The Y-valve 60 is connected to the proximal end of the catheter adapter 50, and a two-way valve 61 is provided on the side branch of the Y-valve 60. When in use, a guide wire passes through the thrombectomy stent 30, the reinforcing tube, the catheter adapter 50, and the Y-valve 60, and the guide wire plays a guiding role in the movement of the thrombectomy stent 30. The suction device 20 is connected to interface b on the side of the catheter connector 1 close to the delivery sheath 2, and the suction device 20 is used to extract the remaining fine thrombus after the thrombectomy stent 30 removes the thrombus, so as to discharge the thrombus out of the body.

[0051] It can be understood that the thrombectomy stent 30 has a radially expanded state and a radially contracted state, so that it can move axially along the delivery sheath 2 under the drive of the reinforcing tube, so as to extend out of or be received in the delivery sheath 2. When the thrombectomy stent 30 reaches the thrombectomy position (i.e., the embolism position), by operating the reinforcing tube, the reinforcing tube pushes the thrombectomy stent 30 received in the delivery sheath 2 to extend out of the delivery sheath 2. After the thrombectomy stent 30 is released from the restraint of the delivery sheath 2, it switches from the radially contracted state to the radially expanded state. When the thrombectomy stent 30 is in the radially expanded state, it can abut against the blood vessel wall, and then through the pulling of the reinforcing tube, the thrombus located on the inner wall of the blood vessel is scraped off. After the thrombus is scraped off, the thrombectomy stent 30 enters the delivery sheath 2 again under the pulling action of the reinforcing tube, thus completing the thrombectomy.

[0052] Please refer to together Figure 1 and Figure 3, It should be noted that during the establishment of the vascular access, in order to enable the delivery sheath 2 to smoothly enter the human body, a dilator 70 with a certain rigidity is inserted into the delivery sheath 2. The delivery sheath 2 is supported by the dilator 70, and the delivery sheath 2 is smoothly extended into the human body to establish a vascular access. Please refer to Figure 3 , The dilator 70 includes a dilator body 71 and a dilator adapter 72. In this embodiment, the dilator body 71 penetrates from the interface c of the catheter connector 1 into the delivery sheath 2, and a part of it extends out of the distal end of the delivery sheath 2 to facilitate the dilation of the incision on the human body and assist the delivery sheath 2 to enter the human body. At least a part of the dilator adapter 72 is located outside the catheter connector 1 and proximal to the interface c, facilitating the operator to remove the dilator 70 after the delivery sheath 2 smoothly enters the human body.

[0053] In one embodiment, the aspiration device 20 includes a connecting tube 21, a stop clamp 22, a female connector 23, a jacket 24, and a piston rod 25. Specifically, one end of the connecting tube 21 is hermetically connected to the interface b on the catheter connector 1, and the end of the connecting tube 21 far from the catheter connector 1 is connected to the female connector 23. The stop clamp 22 is sleeved on the connecting tube 21. The stop clamp 22 is used to control the opening and closing of the connecting tube 21. A male connector (not shown in the drawings) adapted to the female connector 23 is provided at one end of the jacket 24 close to the female connector 23. The jacket 24 is connected to the connecting tube 21 through the mutual cooperation of the female connector 23 and the male connector. The jacket 24 has an aspiration chamber (not shown in the drawings), and the piston rod 25 is movably assembled in the aspiration chamber. The piston rod 25 moves in the aspiration chamber in a direction close to or away from the connecting tube 21 to aspirate thrombus. When aspirating thrombus, by pulling the piston rod 25 away from the connecting tube 21 along the axial direction of the jacket 24, a negative pressure is formed in the aspiration chamber, so that a negative pressure is also formed in the delivery sheath 2 and the catheter connector 1 communicated with the aspiration chamber, and then the fine thrombus remaining at the distal end of the delivery sheath 2 after being chopped is extracted.

[0054] In this embodiment, the connecting tube 21 is made of thermoplastic polyurethane rubber material. In other embodiments, the material of the connecting tube 21 can also be polycarbonate (PC), polystyrene (PS), polyamide (PA), etc.

[0055] Please refer to Figure 2 , In this embodiment, the thrombectomy stent 30 includes a first interception part 31 and a second interception part 32. Among them, the proximal end of the first interception part 31 is connected to the distal end of the reinforcement tube, and the proximal end of the second interception part 32 is connected to the distal end of the first interception part 31. The first interception part 31 is mainly used to scrape and cut the thrombus in the blood vessel, and can also intercept free thrombus. The second interception part 32 is mainly used to collect the scraped thrombus. In other embodiments, the thrombectomy stent 30 may also have only one interception part, or have more than two interception parts.

[0056] Please refer to Figure 1 、 Figure 4 and Figure 5 In one embodiment, the catheter connector 1 includes: a joint body 11, a first sealing assembly 12, and a second sealing assembly 13. Specifically, the joint body 11 has a main channel 101 that axially penetrates. At least one first sealing assembly 12 is provided. The first sealing assembly 12 is connected to one end of the joint body 11 and is used to seal the main channel 101. The second sealing assembly 13 is connected to the end of the first sealing assembly 12 away from the joint body 11 and is used to perform secondary sealing on the main channel 101.

[0057] It can be understood that the first sealing assembly 12 and the second sealing assembly 13 can perform at least two seals on the main channel 101, which can not only improve the sealing effect of the catheter connector 1, but also improve the strength of the sealed portion of the main channel 101, so that the main channel 101 can still maintain a sealed state when it is in a negative pressure, thereby avoiding the destruction of the negative pressure environment in the blood vessel channel, improving the thrombus aspiration effect, and reducing the residual amount of fine thrombus after thrombectomy.

[0058] It should be noted that in this embodiment, only one first sealing assembly 12 is provided. In order to enable the reinforcing tube to pass through the first sealing assembly 12 and the second sealing assembly 13 smoothly, a hydrophilic coating can be applied to the outer wall of the reinforcing tube to reduce the friction force on the surface of the reinforcing tube. In other embodiments, multiple first sealing assemblies 12 can be provided, and the multiple first sealing assemblies 12 perform multiple seals on the main channel 101, which can effectively ensure the sealing effect of the main channel 101. Specifically, the multiple first sealing assemblies 12 are all axially installed, and the first sealing assembly 12 closest to the joint body 11 is directly connected to the joint body 11, and the remaining first sealing assemblies 12 are connected to the previous first sealing assembly 12, so as to indirectly connect to the joint body 11.

[0059] Please refer to Figure 4 and Figure 6 In one embodiment, a first clamping portion 111 is provided on one side of the joint body 11 close to the first sealing assembly 12. The first sealing assembly 12 includes a first sealing member 121 and a first gland 122. The first sealing member 121 has a first opening 1210 that axially penetrates. The first gland 122 has a first through hole 1220 that axially penetrates. The first gland 122 is used to be clamped with the first clamping portion 111, so as to press the first sealing member 121 against the joint body 11.

[0060] It can be understood that by pressing and fixing the first seal 121 on the proximal end face of the joint body 11 through the first gland 122, not only can the sealing effect of the first seal assembly 121 on the main channel 101 be ensured, but also the proximal end face of the joint body 11 can provide an axial supporting force to a part of the first seal 121, reducing the risk of axial deformation of the first seal 121 and further enhancing the sealing effect.

[0061] Please refer to Figures 6 to 8 , in one embodiment, a first groove 110 is provided on the end face of the joint body 11 facing the first seal assembly 12. The first seal 121 includes a first sealing portion 1211 and a first embedding portion 1212 connected to the first sealing portion 1211. The first embedding portion 1212 is used to cooperate with the first groove 110 to preliminarily fix the first seal 121. In this embodiment, the first groove 110 is an annular groove, the first embedding portion 1212 is integrally annular, and at least a part of the first embedding portion 1212 is embedded in the first groove 110.

[0062] In one embodiment, a first opening 1210 is provided on the first sealing portion 1211. A first positioning post 112 is further provided on the end face of the joint body 11 facing the first sealing portion 1211, and the first positioning post 112 extends axially toward the first sealing portion 1211. A first positioning hole 1213 adapted to the first positioning post 112 is provided on the first sealing portion 1211. In this embodiment, a plurality of first positioning posts 112 are provided and are circumferentially spaced apart. Correspondingly, a plurality of first positioning holes 1213 are also provided and are circumferentially spaced apart. The first opening 1210 is located in the annular region surrounded by the first positioning holes 1213, and the first opening 1210 is a cross-shaped hole. In other embodiments, the first opening 1210 can also be a linear hole or a circular hole.

[0063] It can be understood that when a component (such as a reinforcing pipe, an expander 70, etc.) passes through the first seal assembly 12, friction will be generated between the component and the first seal 121, generating a pulling force on the first seal 121 in the distal or proximal direction, causing the first seal 121 to have a tendency to displace distally or proximally. At this time, on the one hand, the pulling force generated by the component on the first seal assembly 121 can be resisted by the cooperation of the first positioning post 112 and the first positioning hole 1212; on the other hand, the pulling force generated by the component on the first seal assembly 121 can be further resisted by the cooperation of the first embedding portion 1212 and the first groove 110. With such a setting, it is possible to prevent the first seal 121 from displacing when the component penetrates or withdraws from the first seal assembly 12, thereby improving the assembly reliability of the first seal assembly 121.

[0064] It should be noted that the first positioning post 112 can also be arranged on the end face of the first sealing part 1211 facing the joint body 11 and extend axially towards the joint body 11. Correspondingly, the first positioning hole 1213 can be arranged on the end face of the joint body 11 facing the first sealing part 1211. Or, a part of the first positioning post 112 is arranged on the first sealing part 1211 and another part is arranged on the joint body 11; similarly, a part of the first positioning hole 1213 is arranged on the first sealing part 1211 and another part is arranged on the joint body 11. In short, the cooperation of the first positioning post 112 and the first positioning hole 1213 can position the first seal 121 and prevent the first sealing assembly 121 from shifting.

[0065] Please refer to Figure 6 、 Figure 7 、 Figure 9 and Figure 10 , in an embodiment, the first gland 122 includes a first pressing part 1221 and a first clamping post 1222 connected to the first pressing part 1221. In this embodiment, a plurality of first clamping posts 1222 are provided and are circumferentially spaced apart. The first clamping post 1222 is used to be clamped with the first clamping part 111 to realize the fixed assembly between the first gland 122 and the connection body 11, so that the first pressing part 1221 presses the first seal 121 against the proximal end face of the connection body 11, thereby sealing the main channel 101.

[0066] In this embodiment, a first clamping head 12221 is arranged on the side of the first clamping post 1222 away from the first pressing part 1221, and the first clamping head 12221 abuts against the end face of the first clamping part 111 away from the first seal 121, so as to realize the clamping of the first gland 122 and the first clamping part 111. A first annular accommodating groove 12212 is arranged on the end face of the first pressing part 1221 facing the first seal 121, and the first annular accommodating groove 12212 is correspondingly arranged with the first positioning post 112. After the first gland 122 is clamped with the first clamping part 111, the first pressing part 1221 presses the first seal 121 tightly against the proximal end face of the joint body 11, and the first seal 121 is elastically deformed under pressure. The proximal end of the first positioning post 112 passing through the first positioning hole 1213 is accommodated in the first annular accommodating groove 12212, so that the first gland 122 presses the first seal 121 tightly to improve the sealing effect.

[0067] In another embodiment, the first annular accommodation groove 12212 may also be a sunk groove communicating with the first through hole 1220. Thus, when the first gland 122 is not engaged with the first engaging portion 111, the first positioning post 112 passes through the first positioning hole 1213, and the first positioning post 112 does not protrude out of the first positioning hole 1213; after the first gland 122 is engaged with the first engaging portion 111, the first gland 122 deforms the first seal 121 by extrusion, so that the first positioning post 112 protrudes out of the first positioning hole 1213 and just abuts against the bottom of the first annular accommodation groove 12212. With such a setting, the first gland 122 and the first seal 121 are pressed more tightly, which is beneficial to improving the sealing performance of the first sealing assembly 12.

[0068] In other embodiments, the first annular accommodation groove 12212 may also be omitted. Thus, when the first gland 122 is not engaged with the first engaging portion 111, the first positioning post 112 passes through the first positioning hole 1213, and the first positioning post 112 does not protrude out of the first positioning hole 1213; after the first gland 122 is engaged with the first engaging portion 111, the first gland 122 deforms the first seal 121 by extrusion, so that the first positioning post 112 protrudes out of the first positioning hole 1213 and just abuts against the end face of the first pressing portion 1221 facing the first engaging portion 111.

[0069] Please refer to Figure 11 and Figure 12 , in another embodiment, a plurality of engaging protrusions 1111 are provided on the outer side wall of the first engaging portion 111, and the plurality of engaging protrusions 1111 are spaced apart along the circumferential direction of the first engaging portion 111. A radially penetrating engaging hole 12220 is provided on each of the plurality of first engaging posts 1222, and the engaging hole 12220 is adapted to the engaging protrusion 1111, further improving the reliability of the connection between the first engaging post 1222 and the first engaging portion 111, making the assembly of the first seal 121 more firm, and being beneficial to improving the radial supporting force of the first sealing assembly 12.

[0070] Please return to Figures 4 to 6 , in one embodiment, the second sealing assembly 13 includes a second seal 131 and a second gland 132. The second seal 131 has a second through hole 1310 axially penetrating therethrough, and a medical device can pass through the second through hole 1310 and the first through hole 1210 respectively and then enter the main channel 101. The second gland 132 has a second through hole 1320 axially penetrating therethrough for the medical device to pass through the second through hole 1310. The second gland 132 is engaged with the first pressing portion 1221 to press the second seal 131 tightly against the end face of the first pressing portion 1221 facing the second seal 131.

[0071] It can be understood that, through the setting of the second sealing assembly 13, at least two sealing structures need to be penetrated before the medical device penetrates into the main channel 101. On the one hand, the main channel 101 is sealed at least twice, which can improve the sealing effect of the catheter connector 1. On the other hand, the setting of the second sealing assembly 13 can prevent air leakage when the main channel 101 is under negative pressure, thereby ensuring the suction effect of the suction device 20 and making the thrombus removal more thorough.

[0072] In one embodiment, the first seal 121 and the second seal 131 are axially misaligned, so that the projections of the first opening 1210 and the second opening 1310 in the axial direction do not overlap. The first seal 121 and the second seal 131 arranged in this way can effectively improve the axial support ability after the first sealing assembly 12 and the second sealing assembly 13 are assembled, and further avoid the phenomenon of air leakage of the first sealing assembly 12 and the second sealing assembly 13 when the main channel 101 is under negative pressure, and further improve the thrombus aspiration effect. In this embodiment, both the first opening 1210 and the second opening 1310 are cross-shaped holes, and the first opening 1210 is misaligned with the second opening 1310 by 45 degrees. That is, the projection of the first opening 1210 on the second seal 131 coincides with the second opening 1310 after rotating 45 degrees.

[0073] Please refer to Figure 6 、 Figure 9 and Figure 13 In one embodiment, a second groove 12210 is provided on the end surface of the first pressing portion 1221 facing the second seal 131. The second seal 131 includes a second sealing portion 1311 and a second embedding portion 1312 connected to the second sealing portion 1311. The second embedding portion 1312 is used to cooperate with the second groove 12210 to preliminarily fix the second seal 131. In this embodiment, the second groove 12210 is also provided as an annular groove, and the second embedding portion 1312 is integrally annular.

[0074] The second opening 1310 is provided on the second sealing portion 1311. A second positioning post 12211 is further provided on the end surface of the first pressing portion 1221 facing the second sealing portion 1311, and the second positioning post 12211 extends axially toward the second sealing portion 1311. A second positioning hole 1313 adapted to the second positioning post 12211 is provided on the second sealing portion 1311. In this embodiment, a plurality of second positioning posts 12211 are provided and are circumferentially spaced apart. Correspondingly, a plurality of second positioning holes 1313 are also provided and are circumferentially spaced apart. The second opening 1310 is located in the annular region surrounded by the plurality of second positioning holes 1313, and the second opening 1310 is a cross-shaped hole. In other embodiments, the second opening 1310 can also be a linear hole.

[0075] It can be understood that when a component (such as a reinforcing pipe, an expander 70, etc.) penetrates through the second sealing assembly 13, friction will be generated between the component and the second seal 131, creating a pulling force on the second seal 131 towards the distal end or the proximal end, causing the second seal 131 to have a tendency to displace towards the distal end or the proximal end. At this time, on the one hand, the second positioning post 12211 can cooperate with the first positioning hole 1312 to resist the pulling force generated by the component on the second sealing assembly 131. On the other hand, the second insertion part 1312 can also cooperate with the second insertion groove 12210 to further resist the pulling force generated by the component on the second sealing assembly 131. With such a setting, it can be avoided that the second seal 131 displaces when the component penetrates into or withdraws from the second sealing assembly 13, thereby improving the reliability of the assembly of the second sealing assembly 131. In addition, when the friction between the component penetrating through the first sealing assembly 12 and the second sealing assembly 13 is relatively large, a hydrophilic coating can be applied to the outer wall of the component to reduce the friction during penetration.

[0076] It should be noted that the second positioning post 12211 can also be arranged on the end face of the second sealing part 1311 facing the first sealing assembly 12 and extend axially towards the first sealing assembly 13. Correspondingly, the second positioning hole 1313 can be arranged on the end face of the first pressing part 1221 facing the second sealing part 1311. Or, a part of the second positioning post 12211 is arranged on the second sealing part 1311, and another part is arranged on the first pressing part 1221. Similarly, a part of the second positioning hole 1313 is arranged on the second sealing part 1311, and another part is arranged on the first pressing part 1221. In short, the cooperation between the second positioning post 12211 and the second positioning hole 1313 can play a positioning role for the second seal 1311 and prevent the first sealing assembly 121 from displacing.

[0077] Please refer to Figure 6 、 Figure 9 and Figure 14 , in an embodiment, the second gland 132 includes a second pressing part 1321 and a second clamping post 1322 connected to the second pressing part 1321. The second clamping post 1322 is used to be clamped with the distal end face of the first pressing part 1221 located between the adjacent first clamping posts 1222, so that the second gland 132 is pressed and locked with the first gland 122, thereby pressing the second seal 131 tightly against the end face of the first pressing part 1221. A plurality of second clamping posts 1322 are provided, and the plurality of second clamping parts 1322 are distributed at intervals along the circumference of the second pressing part 1322.

[0078] In this embodiment, a second engaging head 13221 is provided on one side of the second engaging post 1322 away from the second pressing portion 1321. The first engaging head 13221 abuts against the end face of the first pressing portion 1221 away from the second seal 131, and the second gland 132 is engaged with the first pressing portion 1221. Specifically, the second engaging head 13221 is engaged between adjacent first engaging posts 1222. A second annular receiving groove 13211 is provided on the end face of the second pressing portion 1321 facing the second seal 131, and the second annular receiving groove 13211 is correspondingly arranged with the second positioning post 12211. After the second gland 132 is engaged with the first pressing portion 1221, the second pressing portion 1321 presses the second seal 131 tightly against the proximal end face of the first pressing portion 1221. The second seal 131 undergoes elastic deformation under pressure, and the proximal end of the second positioning post 12211 passing through the second positioning hole 1313 is received in the second annular receiving groove 13211, so that the second gland 132 presses the second seal 131 tightly to improve the sealing effect.

[0079] In another embodiment, the second annular receiving groove 13211 may also be a sunk groove communicating with the second through hole 1320. In this way, when the second gland 132 is not engaged with the first pressing portion 1221, the second positioning post 12211 passes through the second positioning hole 1313, and the second positioning post 12211 does not pass out of the second positioning hole 1313; after the second gland 132 is engaged with the first pressing portion 1221, the second gland 132 deforms the second seal 131, so that the second positioning post 12211 passes out of the second positioning hole 1313 and just abuts against the bottom of the second annular receiving groove 13211. With such a setting, the second gland 132 presses against the second seal 131 more tightly, which is beneficial to improving the sealing performance of the second sealing assembly 13.

[0080] In other embodiments, the second annular receiving groove 13211 may also be omitted. In this way, when the second gland 132 is not engaged with the first pressing portion 1221, the second positioning post 12211 passes through the second positioning hole 1313, and the second positioning post 12211 does not pass out of the second positioning hole 1313; after the second gland 132 is engaged with the first pressing portion 1221, the second gland 132 deforms the second seal 131, so that the second positioning post 12211 passes out of the second positioning hole 1313 and just abuts against the end face of the second pressing portion 1321 facing the first pressing portion 1221.

[0081] Please combine Figure 6 、 Figure 9 and Figure 15, in another embodiment, a third engaging head 13222 is further provided on the second engaging post 1322. The third engaging head 13222 is used to engage with the distal end surface of the first engaging portion 111, so as to perform double-engaging fixation on the second gland 132, further improving the reliability of the installation of the second gland 132.

[0082] It should be noted that the second gland 132 can be a metal part or a plastic part. When the second gland 132 is a metal part, the second gland 132 adopts an integral design and is integrally formed by cutting. When the second gland 132 is a plastic part, the second gland 132 adopts a split design for the convenience of processing the second gland 132.

[0083] In this embodiment, the second gland 132 adopts an integral design. In other embodiments, please refer to Figure 16 , when the second gland 132 is provided in a split manner, the second pressing portion 1321 includes a first splicing portion 13212 and a second splicing portion 13213, and the first splicing portion 13212 and the second splicing portion 13213 are detachably connected. Specifically, a plug post 13214 is convexly provided on the end surface of the second splicing portion 13213 facing the second splicing portion 13213, and a plug hole 13215 corresponding to the plug post 13214 is provided on the first splicing portion 13212. Through the plugging and assembling of the plug post 13214 and the plug hole 13215, the first splicing portion 13212 and the second splicing portion 13213 are spliced to form the second pressing portion 1321. At this time, the second annular accommodating groove 13211 is formed by splicing two semi-annular accommodating grooves.

[0084] 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.

[0085] 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 catheter connector, characterized in that, Comprising: A joint body having a main channel axially penetrating therethrough; At least one first sealing assembly connected to one end of the joint body for sealing the main channel; and, A second sealing assembly connected to the end of the first sealing assembly away from the joint body, the second sealing assembly being used for re-sealing the main channel.

2. The catheter connector according to claim 1, wherein, A first clamping portion is provided on the joint body near the first sealing assembly side, and the first sealing assembly includes: A first sealing member having a first opening axially penetrating therethrough; and, A first gland having a first through hole axially penetrating therethrough, the first gland being clamped with the first clamping portion to press the first sealing member against the joint body.

3. The catheter connector according to claim 2, wherein, A first groove is provided on the end face of the joint body facing the first sealing member. The first sealing member includes a first sealing portion and a first embedding portion connected to the first sealing portion. The first embedding portion is at least partially embedded in the first groove to preliminarily fix the first sealing member.

4. The catheter connector according to claim 3, characterized in that, The first opening is provided on the first sealing portion. A first positioning post is provided on one of the end face of the joint body facing the first sealing portion and the first sealing portion, and a first positioning hole is provided on the other. The first positioning post extends axially toward the first sealing portion side and extends into the first positioning hole.

5. The catheter connector according to claim 2, wherein, The first gland includes a first pressing portion and a first clamping post connected to the first pressing portion. A plurality of the first clamping posts are provided, and the plurality of first clamping posts are circumferentially spaced apart. The plurality of first clamping posts are all clamped with the first clamping portion so that the first pressing portion presses the first sealing member.

6. The catheter connector according to claim 5, wherein, A plurality of clamping protrusions are provided on the first clamping portion and are circumferentially spaced apart. A clamping hole axially penetrating therethrough is provided on each first clamping post. Each first clamping post is clamped with the distal end face of the first clamping portion, and the clamping protrusion passes through the clamping hole.

7. The catheter connector according to claim 5, characterized in that, The second sealing assembly includes: A second sealing member having a second opening axially penetrating therethrough; and, A second gland having a second through hole axially penetrating therethrough, the second gland being clamped with the first pressing portion to press the second sealing member against the end face of the first pressing portion facing the second sealing member.

8. The catheter connector according to claim 7, wherein, The projection of the first opening on the second sealing member does not overlap with the second opening.

9. The catheter connector according to claim 7, wherein, A second groove is provided on the end face of the first pressing portion facing the second sealing member. The second sealing member includes a second sealing portion and a second embedding portion connected to the second sealing portion. The second embedding portion is at least partially embedded in the second groove to preliminarily fix the second sealing member.

10. The catheter connector according to claim 9, characterized in that, The second opening is provided on the second sealing portion. A second positioning post is provided on one of the end face of the first pressing portion facing the second sealing portion and the second sealing portion, and a second positioning hole is provided on the other. The second positioning post extends axially toward the second sealing portion side and extends into the second positioning hole.

11. The catheter connector according to claim 7, wherein, The second gland includes a second pressing portion and second clamping posts connected to the second pressing portion. A plurality of the second clamping posts are provided, and the plurality of second clamping posts are circumferentially spaced apart. The plurality of second clamping posts are all clamped to the first clamping portion so that the second pressing portion presses the second seal.

12. A conveying component, characterized in that, Comprising: The catheter connector and the delivery sheath according to any one of claims 1-11, wherein the delivery sheath is connected to an end of the connection body away from the first seal assembly.

13. A thrombectomy system, characterized in that, Comprising the delivery assembly, the thrombectomy stent and the reinforcement tube connected to the proximal end of the thrombectomy stent according to claim 12, wherein the thrombectomy stent is movably passed through the catheter connector and the delivery sheath driven by the reinforcement tube, and the first seal assembly and the second seal assembly jointly seal the reinforcement tube.

14. The thrombectomy system according to claim 13, wherein The thrombectomy system further includes a suction device connected to the joint body of the catheter connector, and the inner cavity of the delivery assembly is multi-sealed by the first seal assembly and the second seal assembly.

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