Implant conveying system

Abstract

The utility model relates to the technical field of arterial aneurysm embolism instrument conveying, in particular to an implant conveying system which comprises a pushing tube with a tube cavity; one end of the conveying piece is connected with one end of the pushing pipe through a connecting spring; the conveying piece is provided with a conveying cavity and a positioning hole communicated with the conveying cavity; one end of the releasing wire sequentially penetrates through the pipe cavity, the inner space of the connecting spring and the conveying cavity into the positioning hole, and the other end of the releasing wire is arranged at the other end of the pushing pipe through a fixator; when the implant is conveyed, the tail ring of the implant is arranged in the conveying cavity, and one end of the release wire sequentially penetrates through the pipe cavity, the inner space of the connecting spring, the conveying cavity and the tail ring to enter the positioning hole; and the end, located in the positioning hole, of the release wire is pulled out through the fixator, so that the implant is released. The tail ring of the implant is limited by arranging the release wire in the positioning hole, so that the implant is convenient to convey. Not only is the operation of the implant in the releasing process simplified, but also the releasing stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aneurysm embolization instrument delivery technical field, especially implant delivery system. BACKGROUND

[0002] Intracranial aneurysm is a type of pathological change with extremely high harm in cerebrovascular diseases, which is formed from local structural abnormalities or acquired injury of blood vessel wall, and gradually expands into a cystic protrusion under the action of hemodynamic load or external force. The most deadly complication of this type of pathological change is subarachnoid hemorrhage caused by aneurysm rupture, which has a high mortality rate, and some survivors will be left with severe neurological dysfunction. At present, interventional embolization is mainly used for treatment in clinic, and coil embolization has become the mainstream due to its small trauma and rapid recovery. This technology implants a coil into the aneurysm cavity through a microcatheter, and achieves aneurysm cavity occlusion by mechanical filling and thrombosis, but the key link is the precise release control of the coil, which is a key technical difficulty affecting the operation effect.

[0003] In the exploration of coil release methods, the existing technology mainly includes hydrolysis, electrolysis and mechanical release. Hydrolysis releases by dissolving the connecting structure by injecting solvent into the delivery system, but there are two defects: first, the amount of solvent injection is difficult to accurately control, and if the dosage is insufficient, the connecting part cannot be dissolved, and if the dosage is excessive, it may increase the intravascular pressure and induce hemodynamic disorder; second, the solvent needs to flow back through the distal end of the blood vessel, which is easily affected by the tortuosity or branches of the blood vessel, resulting in delayed or failed release. Electrolysis relies on the physical properties of electric current welding, and separates by thermal contraction of the metal welding point after power-off, but uneven heating of the welding site may cause local high voltage, which may cause electrical burns to the tissue, and the release time fluctuates greatly, requiring high skill of the operator. Mechanical release technology realizes the physical separation of the coil and the push system through precise mechanical structure, which has become the current mainstream solution. UTILITY MODEL CONTENTS

[0004] In order to solve or at least partially solve the above technical problems, the utility model provides an implant delivery system.

[0005] The utility model provides an implant delivery system, which comprises a push tube, a connecting spring, a delivery piece, a release wire and a fixator. The push tube has a lumen. One end of the delivery piece is connected to one end of the push tube through the connecting spring. The delivery piece has a delivery cavity and a positioning hole communicating with the delivery cavity. One end of the release wire is sequentially arranged in the lumen, the internal space of the connecting spring, the delivery cavity and the positioning hole. The other end of the release wire is arranged at the other end of the push tube through the fixator.

[0006] In the process of delivering the implant, the tail ring of the implant is arranged in the delivery lumen, and one end of the release wire is arranged in the delivery lumen in sequence through the lumen, the internal space connected with the spring, the delivery lumen and the tail ring and the positioning hole. The other end of the release wire is pulled out of the positioning hole by the fixing device to release the implant.

[0007] Optionally, the delivery member comprises a delivery tube and a positioning tube, the delivery tube has a delivery lumen, and the positioning tube has a positioning hole; the positioning member is arranged in the delivery lumen and connected with the delivery tube.

[0008] Optionally, the length of the positioning tube is less than the length of the delivery tube; and the end face of the positioning tube near the proximal end is a bevel.

[0009] Optionally, the delivery member comprises a delivery tube and a positioning member in the shape of U, the delivery tube has a delivery lumen, and the positioning member is arranged at one end of the delivery tube; the end of the delivery tube near the distal end is located in the U-shaped groove of the positioning member; and the positioning member has a positioning hole in communication with the delivery lumen.

[0010] Optionally, the delivery member comprises a delivery tube and a positioning member, the delivery tube has a delivery lumen, the delivery tube is provided with at least one insertion port in communication with the delivery lumen, one end of the positioning member penetrates through the insertion port into the delivery lumen, and the part of the positioning member in the delivery lumen has a positioning hole; and the positioning member is arranged vertically or obliquely relative to the axis of the delivery tube.

[0011] Optionally, the delivery member comprises a delivery tube and a positioning member, the delivery tube has a delivery lumen, the positioning member is arranged in the delivery lumen, one end of the positioning member is connected with the cavity wall of the delivery lumen, and the positioning member has a positioning hole.

[0012] Optionally, the delivery member comprises a delivery tube and a positioning member, the delivery tube has a delivery lumen, the cavity wall of the delivery lumen is provided with a clamping groove, the positioning member is arranged in the delivery lumen, and both ends of the positioning member are clamped in the clamping groove; and the positioning member has a positioning hole.

[0013] Optionally, one group of auxiliary fixing plates is arranged at both ends of the positioning member; one group of auxiliary fixing plates comprises two auxiliary fixing plates, the two auxiliary fixing plates are respectively located at both sides of the positioning member along the length direction of the positioning member; and the positioning hole is located at the middle part of the positioning member.

[0014] Optionally, the positioning member comprises two positioning sub-plates arranged symmetrically, and the middle part of the two positioning sub-plates has a positioning hole.

[0015] Optionally, the delivery member comprises a delivery tube and a positioning member; the delivery tube has a delivery lumen; the delivery lumen is provided with a clamping groove; the positioning member is woven into a woven body by a plurality of woven wires, the mesh of the woven body is a positioning hole; and the side wall of the positioning member in the non-compressed state is arranged in the clamping groove.

[0016] Optionally, the implant delivery system further comprises:

[0017] The thermoplastic tube is wrapped on the outer wall of the delivery member, or the restraint spring is sleeved on the delivery member, and the thermoplastic tube is wrapped on the restraint spring.

[0018] The utility model provides a kind of implant delivery system, which comprises a push tube, a connecting spring, a delivery member, a release wire and a fixator. The push tube has a lumen. One end of the delivery member is connected to one end of the push tube via the connecting spring. The delivery member has a delivery cavity. A positioning member is arranged on the delivery member and forms a positioning gap between the delivery cavity wall. The positioning gap is in communication with the delivery cavity via the positioning hole of the positioning member. One end of the release wire is sequentially arranged in the lumen, the internal space of the connecting spring, the delivery cavity, the positioning hole and the positioning gap. The other end of the release wire is arranged at the other end of the push tube via the fixator.

[0019] When delivering the implant, the tail ring of the implant is arranged in the delivery cavity, and one end of the release wire is sequentially arranged in the lumen, the internal space of the connecting spring, the delivery cavity, the tail ring and the positioning hole and the positioning gap. The end of the release wire located in the positioning gap is extracted via the fixator to release the implant.

[0020] Optionally, the positioning member is a woven body in the form of a mesh tube woven by a plurality of woven wires, and the mesh holes of the woven body are the positioning holes. When the positioning member is arranged in the delivery cavity, the positioning gap is formed between the positioning member and the delivery cavity wall.

[0021] Compared with the prior art, in the present embodiment, the tail ring of the implant is limited by arranging the release wire in the positioning hole, which facilitates the delivery of the implant. It is also convenient for the release of the implant. When the implant needs to be released, the release wire only needs to be extracted, and the tail ring of the implant loses the limitation of the release wire and can be released.

[0022] All the embodiments of the utility model adopt a technical solution completely opposite to the above-mentioned three prior arts, which not only improves the stability of the implant during delivery, but also simplifies the operation during the release of the implant and improves the release stability. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model, the related drawings will be briefly introduced below. It can be understood that the drawings described below are only used to illustrate some embodiments of the utility model, and those skilled in the art can also obtain many other technical features and connection relationships not mentioned in this paper from these drawings.

[0024] Figure 1 is a cross-sectional view of an embodiment of the implant delivery system of the utility model;

[0025] Figure 2 is Figure 1 the enlarged view of A of

[0026] Figure 3 is a cross-sectional view of an embodiment of a delivery member of an implant delivery system of the present application Figure 1 ;

[0027] Figure 4 is an expanded view of an embodiment of a delivery member of an implant delivery system of the present application Figure 1 ;

[0028] Figure 5 is an expanded view of an embodiment of a delivery member of an implant delivery system of the present application Figure 2 ;

[0029] Figure 6 is a manufacturing view of an embodiment of a delivery member of an implant delivery system of the present application

[0030] Figure 7 is an exploded view of an embodiment of a delivery member of an implant delivery system of the present application

[0031] Figure 8 is a partial cross-sectional view of an embodiment of a delivery member of an implant delivery system of the present application Figure 1 ;

[0032] Figure 9 is an exploded cross-sectional view of an embodiment of a delivery member of an implant delivery system of the present application Figure 1 ;

[0033] Figure 10 is an exploded cross-sectional view of an embodiment of a delivery member of an implant delivery system of the present application Figure 2 ;

[0034] Figure 11 is a partial cross-sectional view of an embodiment of a delivery member of an implant delivery system of the present application Figure 2 ;

[0035] Figure 12 is a partial cross-sectional view of an embodiment of a delivery member of an implant delivery system of the present application Figure 3 ;

[0036] Figure 13 is a cross-sectional view of an embodiment of a positioning member of an implant delivery system of the present application Figure 1 ;

[0037] Figure 14 is a cross-sectional view of an embodiment of a positioning member of an implant delivery system of the present application Figure 2 ;

[0038] Figure 15 This is a partial cross-sectional schematic diagram of a delivery component of an implant delivery system according to this utility model. Figure 4 ;

[0039] Figure 16 This is a partial cross-sectional schematic diagram of a delivery component of an implant delivery system according to this utility model. Figure 5 ;

[0040] Figure 17 This is a side view schematic diagram of an embodiment of the delivery component of an implant delivery system according to the present invention;

[0041] Figure 18 This is a partial schematic diagram of one embodiment of the release wire of the implant delivery system of this utility model;

[0042] Figure 19 This is a partial cross-sectional schematic diagram of a delivery component of an implant delivery system according to this utility model. Figure 6 ;

[0043] Figure 20 This is a partial cross-sectional schematic diagram of a delivery component of an implant delivery system according to this utility model. Figure 7 ;

[0044] Figure 21 This is a schematic diagram of the structure of a delivery component of an implant delivery system according to the present invention;

[0045] Figure 22 This is an exploded view of one embodiment of the delivery component of an implant delivery system according to this utility model;

[0046] Figure 23 This is a partial cross-sectional schematic diagram of a delivery component of an implant delivery system according to this utility model. Figure 8 ;

[0047] Figure 24 This is a schematic diagram illustrating an embodiment of the delivery component of an implant delivery system according to this utility model. Figure 3 .

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

[0049] 1, push tube; 11, lumen; 21, connecting spring; 22, fixator; 23, groove; 31, delivery tube; 32, delivery cavity; 33, positioning tube; 34, positioning hole; 35, insertion port; 36, clamping groove; 41, release wire; 43, limiting block; 44, limiting layer; 5, stainless steel foil; 51, first part; 52, second part; 6, positioning member; 61, U-shaped groove; 62, auxiliary fixing plate; 63, positioning sub-plate; 64, first support part; 65, second support part; 66, connecting ring; 67, positioning gap; 68, accommodating cavity; 71, thermoplastic tube; 72, binding spring; 8, tail ring. DETAILED DESCRIPTION

[0050] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are only used for reference and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0051] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0052] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to represent other meanings, for example, the term "upper" can also be used to represent a certain attachment relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0053] In addition, the terms "set", "connected", and "fixed" should be interpreted broadly. For example, "connected" can be fixed connection, detachable connection, or integral structure; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium, or internal communication between two devices, elements or components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present disclosure according to the specific circumstances.

[0054] Unless otherwise specified, the term "a plurality of" means two or more, and the term "a plurality of groups" means two groups or more.

[0055] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0056] In the present utility model, the distal end refers to the end far away from the operator during surgery, and the proximal end refers to the end close to the operator during surgery. The implant includes a stent or an aneurysm embolization device. The implant can use an existing implant, and the existing implant has a tail ring at the end close to the proximal end.

[0057] The inventor found that the existing hydrolysis and electrolysis have defects, and as the current mainstream mechanical release technology, the inventor searched the existing mechanical release technology, and some of the searched existing technologies are as follows:

[0058] Prior art 1: utility model patent with authorization announcement number CN114504357B.

[0059] Prior art 2: utility model patent with authorization announcement number CN210170107U.

[0060] Prior art 3: utility model patent with authorization announcement number CN109770985B.

[0061] In the above three existing technologies, such mechanical structures mainly use a structure similar to the Chinese Fengmou structure to release the implant, but the structure in such a mechanical release technology scheme is complex, which will cause the implant to be operated complicatedly and have poor release stability during release.

[0062] Therefore, the inventor of the present utility model provides an implant delivery system to solve the above problems. The following will describe several specific embodiments of the present utility model in detail in combination with the drawings.

[0063] First embodiment

[0064] The implant delivery system mentioned in this embodiment is, for example, Figure 1As shown, the implant delivery system comprises a push tube 1, a connecting spring 21, a delivery member, a release wire 41 and a retainer 22. The push tube 1 has a lumen 11 inside. Optionally, the push tube 1 can be made of stainless steel. The connecting spring 21 is arranged between the push tube 1 and the delivery member, specifically, one end of the connecting spring 21 is connected to the end of the push tube 1 close to the distal end, and the other end of the connecting spring 21 is connected to the end of the delivery member close to the proximal end.

[0065] As shown in Figure 1 , Figure 2 , the delivery member comprises a delivery tube 31 and a positioning tube 33. The delivery tube 31 has a delivery lumen 32 inside. The inner space of the positioning tube 33 can be regarded as a positioning hole 34. The positioning tube 33 is arranged on the delivery tube 31 and located in the delivery lumen 32 of the delivery tube 31. In this way, the positioning hole 34 and the delivery lumen 32 are communicated. The delivery lumen 32 of the delivery member is communicated with the lumen 11 of the push tube 1 through the inner space of the connecting spring 21. One end of the release wire 41 is sequentially arranged in the lumen 11 of the push tube 1, the inner space of the connecting spring 21, the delivery lumen 32 of the delivery member and the positioning hole 34 of the positioning tube 33, and the other end of the release wire 41 is arranged in the groove 23 of the retainer 22. The retainer 22 is clamped and fixed to the end of the push tube 1 close to the proximal end, and the end of the push tube 1 close to the proximal end is located in the groove 23 of the retainer 22. In this way, the connection between the retainer 22 and the push tube 1 is completed.

[0066] Optionally, the wire diameter of the release wire 41 is 0.03mm-0.1mm. In this way, the structural strength of the release wire 41 can limit the tail ring 8 of the implant.

[0067] Optionally, as shown in Figure 3 , the middle part of the delivery tube 31 is protruding away from the axis of the delivery tube 31. It can be observed from Figure 3 that the wall of the delivery tube 31 is an arc-shaped protruding wall. In this way, the wall of the delivery tube 31 is arc-shaped, which is more convenient for the delivery of the implant.

[0068] In this embodiment, the structure design scheme of the delivery member is as follows:

[0069] Optionally, not shown in the figure, the length of the positioning tube 33 is less than the length of the delivery tube 31. The positioning tube 33 is located at the middle part of the delivery tube 31 along the length direction. The end face of the end of the positioning tube 33 close to the proximal end is beveled. In this way, the end of the release wire 41 can enter the positioning hole 34.

[0070] Optionally, as shown in Figure 2As shown, the length of the positioning tube 33 is less than the length of the conveying tube 31. The end face of the positioning tube 33 near the distal end is flush with the end face of the conveying tube 31 near the distal end. The end face of the positioning tube 33 near the proximal end is beveled, which facilitates the entry of one end of the release wire 41 into the positioning hole 34.

[0071] Either of the two optional technical solutions mentioned above can be chosen.

[0072] The above-mentioned solution can be further improved by modifying the structure of the conveyor component, specifically:

[0073] Optionally, such as Figure 2 As shown, the positioning tube 33 is disposed on the wall of the conveying cavity 32, and the axis of the positioning hole 34 is parallel to the axis of the conveying cavity 32. This optional technical solution, combined with the above-mentioned optional technical solution, makes it easier for one end of the release wire 41 to enter the positioning hole 34.

[0074] Optionally, not shown in the figure, the outer wall of the positioning tube 33 is connected to the wall of the conveying cavity 32, and the positioning hole 34 is coaxially arranged with the conveying cavity 32. This optional technical solution, combined with the above-mentioned optional technical solution, makes it easier for one end of the release wire 41 to enter the positioning hole 34.

[0075] Either of the two optional technical solutions mentioned above can be chosen.

[0076] The exemplary usage process disclosed in this embodiment is as follows:

[0077] like Figure 1 , Figure 2 As shown, during implant delivery, the tail ring 8 of the implant is first bent towards one side of the implant along its length. Then, the tail ring 8 is positioned within the delivery cavity 32 of the delivery device, with the tail ring 8 located at the proximal end of the positioning hole 34. Next, one end of the release wire 41 is sequentially passed through the lumen 11 of the push tube 1, the internal space of the connecting spring 21, the delivery cavity 32 of the delivery device, and the tail ring 8 of the implant to the positioning hole 34 of the positioning tube 33. The other end of the release wire 41 is positioned at the proximal end of the push tube 1 via the fixator 22, thus securing the implant. When the implant is delivered into the aneurysm, the surgeon only needs to remove the fixator 22 from the push tube 1. The fixator 22 moves the release wire 41 proximally. As the end of the release wire 41 located in the positioning hole 34 is withdrawn, it sequentially passes through the tail ring 8 of the implant, the delivery cavity 32 of the delivery device, the internal space of the connecting spring 21, and the lumen 11 of the push tube 1. When the end of the release wire 41 located in the positioning hole 34 passes through the tail ring 8 of the implant, the tail ring 8 of the implant loses the restriction of the release wire 41, and the implant begins to release and deform.

[0078] Compared with the prior art, in the embodiment, the tail ring 8 of the implant is limited by arranging the release wire 41 in the positioning hole 34, which facilitates the delivery of the implant. Also, the release of the implant is facilitated. When the implant needs to be released, the release wire 41 is only needed to be pulled out, and the tail ring 8 of the implant can be released by losing the limitation of the release wire 41. The embodiment adopts a technical solution completely opposite to the three prior arts, which not only simplifies the operation of the implant in the release process, but also improves the release stability.

[0079] In the embodiment, a manufacturing method of the delivery member is also disclosed, which is specifically as follows.

[0080] Optionally, as shown in Figure 2 , Figure 4 , a rectangular stainless steel foil 5 is divided into a first part 51 and a second part 52 along the dotted line part in the figure, the first part 51 with a smaller area is cut off at a corner, the first part 51 is first rolled towards the second part 52, and the edge of the first part 51 is in contact with the boundary between the first part 51 and the second part 52, and the connection is achieved by laser welding, at this time, the first part 51 is rolled into the positioning tube 33. Then the second part 52 is rolled towards the first part 51, and the edge of the second part 52 is also in contact with the boundary between the first part 51 and the second part 52, and the connection is achieved by laser welding, at this time, the second part 52 is rolled into the delivery tube 31, and the positioning tube 33 is located in the delivery tube 31. In this way, the delivery member with the end face of the positioning tube 33 near the proximal end being a bevel is obtained.

[0081] Optionally, as shown in Figure 2 , Figure 5 , a rectangular stainless steel foil 5 is divided into a first part 51 and a second part 52 along the dotted line part in the figure, the first part 51 is first rolled towards the second part 52, and the edge of the first part 51 is in contact with the boundary between the first part 51 and the second part 52, and the connection is achieved by laser welding, at this time, the first part 51 is rolled into the positioning tube 33. Then the second part 52 is rolled towards the first part 51, and the edge of the second part 52 is also in contact with the boundary between the first part 51 and the second part 52, and the connection is achieved by laser welding, at this time, the second part 52 is rolled into the delivery tube 31, and the positioning tube 33 is located in the delivery tube 31. In this way, the delivery member is obtained.

[0082] Optionally, as shown in Figure 2 , Figure 6As shown, first, a rectangular stainless steel foil 5 with small area is used to roll into a tubular shape, and laser welding is used to connect, so that the positioning tube 33 can be obtained. Then, a rectangular stainless steel foil 5 with large area is used to roll into a tubular shape, and laser welding is used to connect, so that the conveying tube 31 can be obtained. Finally, the positioning tube 33 is arranged in the conveying tube 31, and laser welding is used to connect the positioning tube 33 and the conveying tube 31, and finally the conveying member is obtained.

[0083] Second embodiment

[0084] This embodiment also proposes an implant conveying system. The second embodiment is a further improvement based on the first embodiment, and the main improvement is the structure of the conveying member, and the specific scheme is as follows:

[0085] Optionally, as shown in the figure, the conveying member includes a conveying tube 31 and a positioning member 6. The conveying tube 31 has a conveying cavity 32 inside. The positioning member 6 is in a strip shape, and is arranged in the conveying cavity 32, and one end of the positioning member 6 is connected with the cavity wall of the conveying cavity 32. The positioning member 6 has a positioning hole 34, and one end of the release wire 41 can pass through the positioning hole 34. The length direction of the positioning member 6 is arranged perpendicular to the axis direction of the conveying tube 31. Optionally, the cross-sectional shape of the positioning member 6 is rectangular. Or the cross-sectional shape of the positioning member 6 is wavy. Or the cross-sectional shape of the positioning member 6 is arc-shaped. Figure 3 Optionally, as shown in the figure, the conveying member includes a conveying tube 31 and a positioning member 6. The conveying tube 31 has a conveying cavity 32 inside, and a gap is formed on the tube wall of the conveying tube 31, which is in communication with the conveying cavity 32. The gap can be regarded as an insertion port 35. The positioning member 6 is in a strip shape, and has a positioning hole 34, and one end of the release wire 41 can pass through the positioning hole 34. One end of the positioning member 6 penetrates through the gap into the conveying cavity 32, and the end of the positioning member 6 in the conveying cavity 32 can abut against the cavity wall of the conveying cavity 32, or can not abut against the cavity wall of the conveying cavity 32. The gap clamps and fixes the other end of the positioning member 6.

[0086] Optionally, as shown in the figure, the conveying member includes a conveying tube 31 and a positioning member 6. The conveying tube 31 has a conveying cavity 32 inside, and a gap is formed on the tube wall of the conveying tube 31, which is in communication with the conveying cavity 32. The gap can be regarded as an insertion port 35. The positioning member 6 is in a strip shape, and has a positioning hole 34, and one end of the release wire 41 can pass through the positioning hole 34. One end of the positioning member 6 penetrates through the gap into the conveying cavity 32, and the end of the positioning member 6 in the conveying cavity 32 can abut against the cavity wall of the conveying cavity 32, or can not abut against the cavity wall of the conveying cavity 32. The gap clamps and fixes the other end of the positioning member 6.

[0087] Figure 3 Figure 10 Optionally, as shown in the figure, the conveying member includes a conveying tube 31 and a positioning member 6. The conveying tube 31 has a conveying cavity 32 inside, and a gap is formed on the tube wall of the conveying tube 31, which is in communication with the conveying cavity 32. The gap can be regarded as an insertion port 35. The positioning member 6 is in a strip shape, and has a positioning hole 34, and one end of the release wire 41 can pass through the positioning hole 34. One end of the positioning member 6 penetrates through the gap into the conveying cavity 32, and the end of the positioning member 6 in the conveying cavity 32 can abut against the cavity wall of the conveying cavity 32, or can not abut against the cavity wall of the conveying cavity 32. The gap clamps and fixes the other end of the positioning member 6.

[0088] The exemplary use process disclosed in this embodiment is as follows:

[0089] As shown in the figure, the conveying member includes a conveying tube 31 and a positioning member 6. The conveying tube 31 has a conveying cavity 32 inside, and a gap is formed on the tube wall of the conveying tube 31, which is in communication with the conveying cavity 32. The gap can be regarded as an insertion port 35. The positioning member 6 is in a strip shape, and has a positioning hole 34, and one end of the release wire 41 can pass through the positioning hole 34. One end of the positioning member 6 penetrates through the gap into the conveying cavity 32, and the end of the positioning member 6 in the conveying cavity 32 can abut against the cavity wall of the conveying cavity 32, or can not abut against the cavity wall of the conveying cavity 32. The gap clamps and fixes the other end of the positioning member 6. Figures 1 to 3 ​​As shown, when the implant is delivered, the tail ring 8 of the implant is first bent towards one side of the implant along its length direction, and then the tail ring 8 of the implant is arranged in the delivery cavity 32 of the delivery member, and the tail ring 8 is located at one side of the positioning member 6 along its length direction, and the tail ring 8 of the implant is located below the positioning hole 34, that is, the tail ring 8 of the implant is located at the end of the positioning hole 34 close to the proximal end. Then one end of the release wire 41 is sequentially arranged in the lumen 11 of the push tube 1, the internal space of the connecting spring 21, the delivery cavity 32 of the delivery member, the tail ring 8 of the implant, and the positioning hole 34 of the positioning tube 33, and the other end of the release wire 41 is arranged at the end of the push tube 1 close to the proximal end through the retainer 22, so that the fixation of the implant is realized.

[0090] Compared with the prior art, in the present embodiment, the structure of the delivery member is further simplified, and the simple positioning member 6 is used instead of the positioning tube 33 in the first embodiment, which not only simplifies the structure of the delivery member, but also limits the tail ring 8 of the implant by arranging the release wire 41 in the positioning hole 34, facilitating the delivery of the implant. It is also convenient for the release of the implant. When the implant needs to be released, the release wire 41 only needs to be pulled out, and the tail ring 8 of the implant loses the limitation of the release wire 41 and can be released.

[0091] Third embodiment

[0092] The present embodiment also proposes an implant delivery system. The third embodiment is a parallel embodiment of the second embodiment, and the main improvement is the structure of the delivery member, and the specific scheme is as follows:

[0093] Optionally, as shown in Figure 7 , Figure 8 The delivery member includes a delivery tube 31 and a positioning member 6. The delivery tube 31 has a delivery cavity 32 inside. The cross-sectional shape of the positioning member 6 is U-shaped, that is, the shape of the positioning member 6 is U-shaped. The positioning member 6 has a U-shaped groove 61. The positioning member 6 is arranged at the end of the delivery tube 31 close to the distal end, and the end of the delivery tube 31 close to the distal end is located in the U-shaped groove 61 of the positioning member 6. The positioning member 6 has a positioning hole 34. When the positioning member 6 is arranged on the delivery tube 31, the positioning hole 34 communicates with the delivery cavity 32.

[0094] Optionally, as shown in Figure 9As shown, the conveying component includes a conveying pipe 31 and a positioning component 6. The conveying pipe 31 has a conveying cavity 32 inside. Two insertion ports 35 are provided on the conveying pipe 31, symmetrically arranged along the axis of the conveying pipe 31. One end of the positioning component 6 passes through the two insertion ports 35 and the conveying cavity 32 to the other side of the conveying pipe 31. The middle part of the positioning component 6 is located within the conveying cavity 32, and the middle part of the positioning component 6 has a positioning hole 34. When the positioning component 6 is installed on the conveying pipe 31, the positioning hole 34 communicates with the conveying cavity 32. Both ends of the positioning component 6 are bent towards the proximal end and fit against the outer wall of the conveying pipe 31; at this time, the positioning component 6 has a U-shaped shape.

[0095] Either of the two optional technical solutions mentioned above can be chosen.

[0096] Fourth embodiment

[0097] This embodiment also proposes an implant delivery system. The fourth embodiment is a parallel embodiment to the second embodiment, with the main improvement being the structure of the delivery component, as detailed below:

[0098] Optionally, such as Figure 10 As shown, the conveying component includes a conveying pipe 31 and a positioning component 6. The conveying pipe 31 has a conveying cavity 32 inside. The wall of the conveying pipe 31 has an insertion port 35, which communicates with the conveying cavity 32. Correspondingly, the wall of the conveying cavity 32 has a locking groove 36. The insertion port 35 and the locking groove 36 are located on opposite sides of the axis of the conveying pipe 31, and are positioned opposite each other, i.e., at the same horizontal level. The positioning component 6 is perpendicular to the axis of the conveying pipe 31 in its length direction. The positioning component 6 has a long strip-shaped structure and a positioning hole 34 in its middle. One end of the positioning component 6 passes through the insertion port 35 into the conveying cavity 32 and is inserted into the locking groove 36 for locking and fixing. When the positioning component 6 is placed on the conveying pipe 31, the positioning hole 34 of the positioning component 6 communicates with the conveying cavity 32. The other end of the positioning element 6 is flush with the outer wall of the delivery tube 31, which ensures that there is no protrusion on the surface of the delivery element and makes it easier to deliver the implant.

[0099] Optionally, such as Figure 10 , Figure 11As shown, the delivery member comprises a delivery tube 31 and a positioning member 6. The delivery tube 31 has a delivery cavity 32 inside. The delivery tube 31 has an insertion opening 35 on the tube wall, which is in communication with the delivery cavity 32. Correspondingly, the delivery cavity 32 has a clamping groove 36 on the cavity wall. The insertion opening 35 and the clamping groove 36 are respectively located on both sides of the axis of the delivery tube 31, and the height of the clamping groove 36 is lower than that of the insertion opening 35. The positioning member 6 is obliquely arranged along the axis of the delivery tube 31. The positioning member 6 has a positioning hole 34 in the middle. One end of the positioning member 6 penetrates the insertion opening 35 into the delivery cavity 32 and is inserted into the clamping groove 36 for clamping and fixing. When the positioning member 6 is arranged on the delivery tube 31, the positioning hole 34 of the positioning member 6 is in communication with the delivery cavity 32. The other end of the positioning member 6 is flush with the outer tube wall of the delivery tube 31, so that the outer surface of the delivery member is ensured to be smooth and the delivery of the implant is facilitated.

[0100] The above two optional technical solutions can be selected.

[0101] Optionally, the cross-sectional shape of the positioning member 6 is rectangular. Or the cross-sectional shape of the positioning member 6 is wavy. Or the cross-sectional shape of the positioning member 6 is arc-shaped.

[0102] Fifth embodiment

[0103] The present embodiment also proposes an implant delivery system. The fifth embodiment is a parallel embodiment of the second embodiment, and the main improvement is the structure of the delivery member. The specific scheme is as follows:

[0104] Optionally, as shown in the figure, Figure 12 the delivery member comprises a delivery tube 31 and a positioning member 6. The delivery tube 31 has a delivery cavity 32 inside. The delivery cavity 32 has two clamping grooves 36 on the cavity wall, which are symmetrically arranged along the axis of the delivery tube 31. The positioning member 6 has a positioning hole 34. The positioning member 6 is arranged in the delivery cavity 32, and the two ends of the positioning member 6 respectively enter the two clamping grooves 36 for clamping and fixing. When the positioning member 6 is arranged on the delivery tube 31, the positioning hole 34 of the positioning member 6 is in communication with the delivery cavity 32. In this way, the positioning member 6 can be prevented from protruding from the outer surface of the delivery tube 31, and the passing performance of the delivery member in the microcatheter is improved.

[0105] Optionally, as shown in the figure, Figures 12 to 14 the difference from the above optional technical solution is the shape of the positioning member 6. The cross-sectional shape of the positioning member 6 is rectangular. Or the cross-sectional shape of the positioning member 6 is wavy. Or the cross-sectional shape of the positioning member 6 is arc-shaped.

[0106] Optionally, as shown in the figure, Figure 12 , Figure 15As shown, the difference between the above-mentioned optional technical solutions is the structure of the positioning member 6. The positioning member 6 is integrally formed with two groups of auxiliary fixing plates 62, which are arranged at the two ends of the positioning member 6. Since the two groups of auxiliary fixing plates 62 are arranged in the same way on the positioning member 6, the connection structure of one group of auxiliary fixing plates 62 and the positioning member 6 is introduced. One group of auxiliary fixing plates 62 includes two auxiliary fixing plates 62, which are arranged on the two sides of the positioning member 6 along the length direction, i.e., one end of one auxiliary fixing plate 62 is arranged on one side of the positioning member 6, and one end of the other auxiliary fixing plate 62 is arranged on the other side of the positioning member 6. Both of the two auxiliary fixing plates 62 are arranged obliquely on the positioning member 6. Specifically, one end of one auxiliary fixing plate 62 is arranged on one side of the positioning member 6, and the other end of the auxiliary fixing plate 62 is arranged towards the distal end. One end of the other auxiliary fixing plate 62 is arranged on the other side of the positioning member 6, and the other end of the auxiliary fixing plate 62 is arranged towards the proximal end. The middle part of the positioning member 6 has a positioning hole 34. Correspondingly, a plurality of clamping grooves 36 are arranged on the cavity wall of the conveying cavity 32, which can be used for clamping and fixing the auxiliary fixing plates 62 and the positioning member 6. The auxiliary fixing plates 62 can assist the positioning member 6 to be clamped and fixed more stably in the conveying cavity 32 of the conveying member.

[0107] Alternatively, as shown in Figure 12 , Figure 16 The difference between the above-mentioned optional technical solutions is the structure of the positioning member 6. The positioning member 6 includes two positioning sub-plates 63, both of which are arc-shaped plates. One positioning sub-plate 63 protrudes towards the proximal end, and the other positioning sub-plate 63 protrudes towards the distal end. The two positioning sub-plates 63 are connected at the middle part. In this way, the two positioning sub-plates 63 are symmetrically arranged. The middle part of the connection between the two positioning sub-plates 63 has a positioning hole 34. Correspondingly, a plurality of clamping grooves 36 are arranged on the cavity wall of the conveying cavity 32, which can be used for clamping and fixing the two positioning sub-plates 63. In this way, the two symmetrically arranged arc-shaped positioning sub-plates 63 can be clamped and fixed more stably in the conveying cavity 32 of the conveying member.

[0108] The above-mentioned four optional technical solutions can be selected.

[0109] Sixth embodiment

[0110] This embodiment also proposes an implant delivery system. The sixth embodiment is a further improvement based on any one of the second to fifth embodiments. The main improvement is the structure of the positioning hole 34 of the positioning member 6 and the release wire 41. The specific structure is as follows:

[0111] Alternatively, as shown in Figure 17 , Figure 18As shown, the end of the release wire 41 close to the distal end is also provided with a limiting block 43. Alternatively, the end of the release wire 41 close to the distal end is provided at the middle position of the limiting block 43. The width of the limiting block 43 is the same as the diameter of the release wire 41. The positioning hole 34 is a waist-shaped hole, the diameter of the positioning hole 34 is larger than the diameter of the release wire 41, the length of the positioning hole 34 is larger than the length of the limiting block 43, and the length of the limiting block 43 is larger than the diameter of the positioning hole 34. Before the tail ring 8 of the implant is about to enter the positioning hole 34 at the end of the release wire 41, the release wire 41 is rotated so that the length direction of the limiting block 43 is the same as the length direction of the waist-shaped hole, so that the limiting block 43 can pass through the positioning hole 34. Then the release wire 41 is rotated by a certain angle, so that the length direction of the limiting block 43 is obliquely arranged in the length direction of the waist-shaped hole, so that the limiting is completed. In this embodiment, the limiting block 43 is used instead of the anchor 22, and the limiting block 43 is arranged at the end of the release wire 41 close to the distal end, which can prevent the release wire 41 from moving.

[0112] Alternatively, as shown in Figure 17 , Figure 18 different from the above-mentioned optional technical solutions, the end of the release wire 41 close to the distal end is also provided with two limiting blocks 43, the two limiting blocks 43 are sequentially and spaced apart along the length direction of the release wire 41, one limiting block 43 is located at the end of the release wire 41 close to the distal end, and the other limiting block 43 is close to the proximal end, and a limiting interlayer 44 is formed between the two limiting blocks 43. Before the tail ring 8 of the implant is about to enter the positioning hole 34 at the end of the release wire 41, the release wire 41 is rotated so that the length direction of the limiting block 43 is the same as the length direction of the waist-shaped hole, so that the limiting block 43 can pass through the positioning hole 34. When the limiting block 43 close to the distal end passes through the positioning hole 34, the release wire 41 is rotated by a certain angle, so that the length direction of the limiting block 43 is obliquely arranged in the length direction of the waist-shaped hole, and at this time the positioning member 6 is also located in the limiting interlayer 44 between the two limiting blocks 43, so that the limiting is completed. In this embodiment, the limiting block 43 is used instead of the anchor 22, and the two limiting blocks 43 are arranged at the end of the release wire 41 close to the distal end, which can prevent the release wire 41 from moving.

[0113] The above two optional technical solutions can be selected.

[0114] Of course, the limiting block 43 is arranged at the end of the release wire 41 close to the distal end, and the anchor 22 is arranged at the end of the release wire 41 close to the proximal end, so that the risk of the release wire 41 moving is smaller, and the release wire 41 can be more stably arranged in the positioning hole 34.

[0115] Seventh embodiment

[0116] The third embodiment is a further improvement based on the first or second embodiment, and the main improvement is as follows:

[0117] Optionally, as shown in Figure 12 , Figure 19 , the delivery member comprises a delivery tube 31 and a positioning member 6. The delivery tube 31 has a delivery cavity 32 inside. The delivery cavity 32 has a clamping groove 36 on the cavity wall, which is arranged around the axis of the delivery tube 31. A plurality of braided wires are cross-braided to form a braided body, which can be regarded as the positioning member 6. The positioning member 6 has a plurality of mesh holes in the circumferential direction and at both ends thereof, and both ends of the positioning member 6 are designed in a closed structure. The mesh holes can be regarded as positioning holes 34. The diameters of both ends of the positioning member 6 are the same, and the diameter of the middle part of the positioning member 6 is larger than that of one end, which can make the positioning member 6 in a lantern shape. The positioning member 6 in a lantern shape can better fit the cavity wall of the delivery cavity 32, thereby increasing the stability of the positioning member 6 in the delivery cavity 32. When the positioning member 6 is arranged in the delivery cavity 32, the side wall of the positioning member 6 in an expanded state (i.e., a non-compressed state) is clamped in the clamping groove 36, which can further improve the stability of the positioning member 6 in the delivery cavity 32.

[0118] The exemplary use process disclosed in the embodiment is as follows:

[0119] As shown in Figure 12 , Figure 19 , when the implant is delivered, the tail ring 8 of the implant is first bent towards one side of the implant along the length direction, and then the tail ring 8 of the implant is arranged in the delivery cavity 32 of the delivery member, and the tail ring 8 passes through the positioning holes 34 and enters the positioning member 6 in a lantern shape, and then one end of the release wire 41 passes through the lumen 11 of the push tube 1, the internal space of the connecting spring 21, the delivery cavity 32 of the delivery member, the positioning hole 34 close to the proximal end of the positioning member 6, the tail ring 8 of the implant, and the other positioning hole 34 close to the distal end of the positioning member 6 in sequence, and the other end of the release wire 41 is arranged on the end of the push tube 1 close to the proximal end through the fixator 22. The position of the positioning hole 34 close to the proximal end of the positioning member 6 corresponds to the position of the other positioning hole 34 close to the distal end of the positioning member 6, so that the release wire 41 passes through the tail ring 8 between the two positioning holes 34 to realize the limiting fixation of the implant, which is more reliable.

[0120] Optionally, as shown in Figure 12 , Figure 20As shown, the delivery member includes a delivery tube 31, a positioning member 6. The delivery tube 31 has a delivery cavity 32 inside. The delivery cavity 32 has two clamping grooves 36 on the cavity wall, and the two clamping grooves 36 are sequentially and spaced apart along the length direction of the delivery tube 31. The clamping grooves 36 are annularly arranged around the axis of the delivery tube 31. A plurality of woven wires are cross-woven to form a woven body, which can be regarded as the positioning member 6. The positioning member 6 includes a first support part 64 and a second support part 65, both of which are trumpet-shaped, and the small-diameter end of the first support part 64 is connected to the small-diameter end of the second support part 65, and a connecting ring 66 is sleeved at the connection position of the two. Optionally, the connecting ring 66 can be made of a developing material. In the utility model, the developing material can be any one of platinum-iridium alloy, platinum-tungsten alloy, and tantalum alloy. The first support part 64 and the second support part 65 both have a plurality of mesh holes, which can be regarded as positioning holes 34. When the positioning member 6 is arranged in the delivery cavity 32, in the inflation state (i.e. the non-compressed state) of the positioning member 6, the large-diameter end edge of the first support part 64 is clamped in the clamping groove 36 close to the distal end, and the large-diameter end edge of the second support part 65 is clamped in the clamping groove 36 close to the proximal end, and such a structure can make the positioning member 6 present an I-shaped structure, and can further improve the stability of the positioning member 6 in the delivery cavity 32.

[0121] The example use process disclosed in the embodiment is as follows:

[0122] As shown in Figure 12 , Figure 20 , when the implant is delivered, the tail ring 8 of the implant is first bent towards one side of the implant along the length direction of the implant, and then the tail ring 8 of the implant is arranged in the delivery cavity 32 of the delivery member, and the tail ring 8 passes through the positioning hole 34 of the first support part 64 into the space between the first support part 64 and the second support part 65. Then one end of the release wire 41 sequentially passes through the lumen 11 of the push tube 1, the internal space of the connecting spring 21, the delivery cavity 32 of the delivery member, a positioning hole 34 of the second support part 65, the tail ring 8 of the implant, and a positioning hole 34 of the first support part 64, and the other end of the release wire 41 is arranged on the end of the push tube 1 close to the proximal end through the retainer 22. The position of the positioning hole 34 of the first support part 64 corresponds to the position of the positioning hole 34 of the second support part 65, so that the positioning and fixing of the implant are realized by the release wire 41 passing through the tail ring 8 between the two positioning holes 34, and such positioning and fixing are more reliable.

[0123] Optionally, of course, the clamping grooves 36 can not be arranged on the cavity wall of the delivery cavity 32, and the delivery tube 31 can be directly supported and fixed by the tension of the positioning member 6 in the inflation state. Laser welding technology can also be used to connect the positioning member 6 and the delivery tube 31.

[0124] The three optional technical solutions can be selected independently.

[0125] Of course, the number of the release wire 41 can also be multiple. The arrangement of the multiple release wires 41 is the same as that of the single release wire 41, and each release wire 41 is arranged in a different positioning hole 34.

[0126] Eighth embodiment

[0127] The eighth embodiment is a parallel embodiment of the first embodiment, and the differences between the eighth embodiment and the first embodiment are as follows:

[0128] The implant delivery system mentioned in this embodiment, as shown in Figure 1 、 Figure 2 、 Figure 21 、 Figure 22 , the implant delivery system includes a push tube 1, a connecting spring 21, a delivery member, a positioning member 6, a release wire 41, and a retainer 22. The push tube 1 has a lumen 11 inside. The connecting spring 21 is arranged between the push tube 1 and the delivery member. Specifically, one end of the connecting spring 21 is connected to the end of the push tube 1 close to the distal end, and the other end of the connecting spring 21 is connected to the end of the delivery member close to the proximal end.

[0129] As shown in Figure 21 、 Figure 22 , the delivery member has a tubular structure and can be regarded as a delivery tube 31, and the delivery member has a delivery lumen 32 inside. The positioning member 6 has a positioning hole 34, and the positioning member 6 is arranged on the delivery member. The part of the positioning member 6 provided with the positioning hole 34 is located in the delivery lumen 32 of the delivery member, and the part of the positioning member 6 provided with the positioning hole 34 is attached to the cavity wall of the delivery lumen 32, and the part of the positioning member 6 provided with the positioning hole 34 forms a positioning gap 67 with the cavity wall of the delivery lumen 32. The positioning gap 67 communicates with the delivery lumen 32 of the delivery member through the positioning hole 34 of the positioning member 6. One end of the release wire 41 is sequentially arranged in the lumen 11 of the push tube 1, the internal space of the connecting spring 21, the delivery lumen 32 of the delivery member, and the positioning hole 34 of the positioning member 6 to the positioning gap 67. The other end of the release wire 41 is arranged in the groove 23 of the retainer 22, the retainer 22 is clamped and fixed to the end of the push tube 1 close to the proximal end, and the end of the push tube 1 close to the proximal end is located in the groove 23 of the retainer 22, so that the connection between the retainer 22 and the push tube 1 is completed.

[0130] Optionally, as shown in Figure 3 , the middle part of the delivery tube 31 is protruding away from the axis of the delivery tube 31, which can be seen from Figure 3It is observed that the wall of the delivery tube 31 is an outwardly protruding arc-shaped wall. Such arrangement can make the wall of the delivery tube 31 arc-shaped, which can make the positioning gap 67 larger, facilitating not only the delivery of the implant but also the threading of the release wire 41 into the positioning gap 67.

[0131] In the present embodiment, the structure of the delivery member and the positioning member 6 is as follows:

[0132] Alternatively, as shown in Figure 21 , Figure 22 , the positioning member 6 is made of a low-elasticity high-molecular material such as nylon or PTFE, and has a receiving cavity 68. The positioning member 6 is sleeved on the wall of the delivery member along the length direction of the delivery member, and the wall of the delivery member is located in the receiving cavity 68 of the positioning member 6, and the positioning member 6 is located on one side of the axis of the delivery member. The positioning hole 34 of the positioning member 6 is located in the delivery cavity 32, and the part of the positioning member 6 provided with the positioning hole 34 forms a positioning gap 67 with the cavity wall of the delivery cavity 32. Such arrangement facilitates the threading of one end of the release wire 41 into the positioning gap 67.

[0133] Alternatively, as shown in Figure 21 , Figure 23 , a plurality of braided wires are cross-braided to form a braided body in the form of a mesh tube, which can be regarded as the positioning member 6. The mesh holes of the braided body can be regarded as the positioning hole 34 of the positioning member 6. When the positioning member 6 is arranged in the delivery cavity 32, the positioning member 6 in the expanded state (i.e. non-compressed state) abuts against the cavity wall of the delivery cavity 32, and the positioning gap 67 is formed between the positioning member 6 and the cavity wall of the delivery cavity 32. The positioning member 6 in the expanded state can be used to support and fix the delivery tube 31 by its own tension, which can further improve the stability of the positioning member 6 in the delivery cavity 32.

[0134] The above two optional technical solutions can be selected.

[0135] The exemplary use process disclosed in the present embodiment is as follows:

[0136] As shown in Figure 1 , Figure 2 , Figure 21 , when delivering the implant, the tail ring 8 of the implant is first arranged in the delivery cavity 32 of the delivery member, and then one end of the release wire 41 is threaded into the lumen 11 of the push tube 1, the internal space of the connecting spring 21, the delivery cavity 32 of the delivery member, the tail ring 8 of the implant, and the positioning hole 34 of the positioning member 6 to the positioning gap 67 in sequence. The other end of the release wire 41 is arranged in the push tube 1 near the proximal end through the retainer 22. In this way, the implant is fixed and limited, which is more reliable.

[0137] In the present embodiment, a connecting method of the positioning member 6 and the delivery member is also disclosed, which is specifically as follows:

[0138] Optionally, as shown in Figure 21 , Figure 22 , Figure 24 illustrated, a sleeve structure with elasticity is prepared by using a polymer material, which can be regarded as the positioning member 6. The inner space of the sleeve structure of the positioning member 6 can be regarded as the accommodating cavity 68, and one side of the positioning member 6 has the positioning hole 34 in communication with the accommodating cavity 68.

[0139] The sleeve structure of the positioning member 6 is sleeved on a rectangular stainless steel foil 5, that is, the rectangular stainless steel foil 5 penetrates through the accommodating cavity 68 of the positioning member 6. The rectangular stainless steel foil 5 is rolled to connect the two ends of the rectangular stainless steel foil 5 along the length direction and form the tubular structure of the delivery member.

[0140] Compared with the first embodiment, the present embodiment is more reliable in limiting and fixing the implant. However, the first embodiment is more convenient for the disengagement wire 41 to enter the positioning hole 34.

[0141] Ninth embodiment

[0142] The present embodiment also proposes an implant delivery system, and the ninth embodiment is a further improvement based on any one of the first to eighth embodiments, and the main improvements are specifically as follows:

[0143] Optionally, as shown in Figure 23 , the implant delivery system further comprises a thermoplastic tube 71, and the thermoplastic tube 71 is sleeved on the outer tube wall of the delivery tube 31. That is, the thermoplastic tube 71 can be regarded as being wrapped on the outer wall of the delivery member. By arranging the thermoplastic tube 71 on the outer wall of the delivery member, the outer surface of the delivery member can be smoother and neater, which can avoid hindering the delivery of the implant in the microcatheter and is more convenient for the delivery of the implant.

[0144] Optionally, as shown in Figure 23 , the implant delivery system further comprises the thermoplastic tube 71 and a restraint spring 72, and the restraint spring 72 can be made of a radiopaque material. This is convenient for the operator to observe the position of the delivery member under the condition of fluoroscopy. The restraint spring 72 is sleeved on the delivery tube 31 and in contact with the outer tube wall of the delivery tube 31, that is, the restraint spring 72 can be regarded as being sleeved on the delivery member. The thermoplastic tube 71 is sleeved on the restraint spring 72, that is, the thermoplastic tube 71 can be regarded as being wrapped on the restraint spring 72. In the present embodiment, the restraint spring 72 is first used to constrain the delivery tube 31 to prevent the delivery tube 31 from being damaged or disintegrated along the laser welding seam. Then, the thermoplastic tube 71 is used to wrap the restraint spring 72, so that the outer surface of the restraint spring 72 can be smoother and neater, which can avoid hindering the delivery of the implant in the microcatheter and is more convenient for the delivery of the implant.

[0145] The two optional technical solutions can be selected.

[0146] Finally, it should be noted that those skilled in the art can understand that, in order to enable the reader to better understand the present application, the embodiments of the present application propose many technical details. However, even without these technical details and various changes and modifications based on the above embodiments, the technical solutions claimed in each claim of the present application can be basically realized. Therefore, in practical applications, various changes can be made to the above embodiments in form and detail without departing from the spirit and scope of the present application.

Claims

1. An implant delivery system, characterized by, The implant delivery system comprises: a push tube having a tube cavity; a delivery member having one end connected to one end of the push tube through a connecting spring; the delivery member has a delivery cavity and a positioning hole in communication with the delivery cavity; a release wire having one end sequentially passing through the tube cavity, the internal space of the connecting spring, the delivery cavity and the positioning hole, and the other end being arranged at the other end of the push tube through a fixing device; when the implant is delivered, a tail ring of the implant is arranged in the delivery cavity, and one end of the release wire sequentially passes through the tube cavity, the internal space of the connecting spring, the delivery cavity and the tail ring and is arranged in the positioning hole; one end of the release wire arranged in the positioning hole is pulled out through the fixing device to release the implant.

2. The implant delivery system of claim 1, wherein, The delivery member comprises: a delivery tube having a delivery cavity; a positioning tube having a positioning hole; and 3. The implant delivery system according to claim 2, wherein the length of the positioning tube is less than the length of the delivery tube; and an end face of the positioning tube close to the proximal end is a bevel.

4. The implant delivery system of claim 1, wherein, The delivery member comprises: a delivery tube having a delivery cavity; a positioning member in the shape of U arranged at one end of the delivery tube; an end of the delivery tube close to the distal end is arranged in a U-shaped slot of the positioning member; and the positioning member has a positioning hole in communication with the delivery cavity.

5. The implant delivery system of claim 1, wherein, The delivery member comprises: a delivery tube having a delivery cavity; and a positioning member having one end penetrating into the delivery cavity through the insertion port; and the positioning member is arranged perpendicularly or obliquely relative to the axis of the delivery tube.

6. The implant delivery system of claim 1, wherein, The delivery member comprises: a delivery tube having a delivery cavity; a positioning member arranged in the delivery cavity; one end of the positioning member is connected to the cavity wall of the delivery cavity; and the positioning member has a positioning hole.

7. The implant delivery system of claim 1, wherein, The delivery member comprises: a delivery tube having a delivery cavity; and a positioning member arranged in the delivery cavity; two ends of the positioning member are respectively clamped in the clamping slots; and the positioning member has a positioning hole.

8. The implant delivery system according to claim 7, wherein each of the two ends of the positioning member is provided with a set of auxiliary fixing plates; each set of auxiliary fixing plates comprises two auxiliary fixing plates, and the two auxiliary fixing plates are respectively arranged on the two sides of the positioning member along the length direction of the positioning member; and the positioning hole is arranged in the middle part of the positioning member.

9. The implant delivery system according to claim 7, wherein the positioning member comprises two positioning sub-plates arranged symmetrically, and the middle part of the two positioning sub-plates has a positioning hole.

10. The implant delivery system of claim 1, wherein, The delivery member comprises: a delivery tube having a delivery cavity; and a positioning member formed by weaving a plurality of woven wires into a woven body; the mesh holes of the woven body are the positioning holes; and the side wall of the positioning member in the non-compressed state is arranged in the clamping slot.

11. The implant delivery system of any of claims 1 to 10, wherein, Further comprising: a thermoplastic tube covering the outer wall of the delivery member; or a restraint spring sleeved on the delivery member; and a thermoplastic tube covering the restraint spring.

12. An implant delivery system, characterized by The implant delivery system comprises: a push tube having a tube cavity; a delivery member having one end connected to one end of the push tube through a connecting spring; the delivery member has a delivery cavity; a positioning member arranged on the delivery member and forming a positioning gap between the cavity wall of the delivery cavity; and the positioning gap is in communication with the delivery cavity through the positioning hole of the positioning member. The release wire is sequentially threaded through the lumen, the inner space of the connecting spring, the delivery lumen, the positioning hole and the positioning gap at one end, and is arranged at the other end of the push tube through the fixator; When the implant is delivered, the tail ring of the implant is arranged in the delivery lumen, and one end of the release wire is sequentially threaded through the lumen, the inner space of the connecting spring, the delivery lumen, the tail ring, the positioning hole and the positioning gap; The end of the release wire in the positioning gap is pulled out through the fixator to release the implant.

13. The implant delivery system according to claim 12, characterized in that The positioning member is woven into a braided body in the form of a mesh tube by a plurality of braided wires, and the mesh holes of the braided body are the positioning holes; when the positioning member is arranged in the delivery lumen, the positioning gap is formed between the positioning member and the lumen wall of the delivery lumen.

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