Implant conveying system and inner pipe assembly and conveying component thereof

Abstract

The utility model belongs to the field of medical equipment, and particularly relates to an implant conveying system as well as an inner tube assembly and a conveying component thereof. The inner tube assembly includes: an inner tube; the inner sleeve is arranged outside the inner pipe in a sliding and sleeving manner; the tube sleeve is connected to the outer part of the near end of the inner sleeve; the inner tube protection structure is fixedly arranged outside the near end of the inner tube in a sleeving mode, and the inner tube protection structure is located between the tube sleeve and the inner tube so that an anti-bending tube layer with the preset axial length can be formed at the near end of the inner tube. According to the utility model, the inner tube protection structure is arranged outside the near end of the inner tube, so that supporting force can be provided for the near end of the inner tube, and the inner tube is prevented from being bent in the implant conveying process, particularly in the inner tube withdrawing process.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment, and in particular relates to an inner tube component for an implant delivery system, a delivery component for the implant delivery system and an implant delivery system. Background Art

[0002] Cardiac interventional surgery is a new technology for diagnosing and treating cardiovascular diseases. It is a diagnostic and treatment method that punctures the surface blood vessels, inserts a cardiac catheter under continuous digital subtraction angiography, and uses specific cardiac catheter operation techniques to confirm and treat heart disease.

[0003] Cardiac interventional surgery instruments need to place implants - valve prostheses - into designated locations. Due to the complexity of the heart's location, the implant delivery system requires multiple pipelines to complete the surgery. The delivery catheter is equipped with a plug for guiding, where the plug is connected to the proximal end of the delivery handle through an inner tube. After the valve prosthesis is released, the plug is pulled back to the distal end of the delivery catheter by the inner tube, and then withdrawn from the human body along with the delivery catheter.

[0004] Due to the limitation of the inner diameter of human blood vessels, the outer diameter of the delivery catheter cannot be too large, which requires that the diameter and / or wall thickness of the multi-layer pipeline in the implant delivery system be very small. Since the inner tube is close to the axial center, its inner diameter is the smallest and the pipeline is also the most fragile. In the process of withdrawing the inner tube to the distal end of the delivery catheter, the inner tube extends from the nearest end of the delivery catheter. Since it is relatively fragile, it is easy to bend during the extension process. At the same time, the proximal end of the inner tube needs to move axially, and the fixed seat that drives the movement of the inner tube needs to be fixed and sealed with the structure of the delivery handle. When the diameter of the inner tube is very small, the fixation and sealing between the inner tube fixed seat and the delivery handle are also difficult.

[0005] Therefore, it is necessary to develop an implant delivery system and an inner tube assembly and a delivery member thereof that can solve at least one of the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide an implant delivery system and its inner tube assembly and delivery component, which can provide support force for the inner tube with a smaller diameter and / or wall thickness and is relatively fragile in the pipeline, thereby preventing the inner tube from bending during the implant delivery process, especially bending during the process of withdrawing the inner tube to the distal end of the delivery catheter.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] According to a first aspect of the utility model, there is provided an inner tube assembly for an implant delivery system, comprising:

[0009] Inner tube;

[0010] An inner sleeve, slidably sleeved on the outside of the inner tube;

[0011] a sleeve connected to the outside of the proximal end of the inner sleeve; and

[0012] The inner tube protection structure is fixedly sleeved outside the proximal end of the inner tube, and the inner tube protection structure is located between the sleeve and the inner tube to form an anti-bending tube layer with a predetermined axial length at the proximal end of the inner tube.

[0013] According to one embodiment of the utility model, the inner tube protection structure includes a main body portion sleeved on the outside of the inner tube and a handle portion extending axially from the main body portion beyond the inner tube, the main body portion has an inner hole for receiving the inner tube, and the portion of the main body portion excluding the inner hole is used to form the anti-bending tube layer.

[0014] According to an embodiment of the utility model, the handle portion is provided with a radial protrusion for the operator to hold it easily.

[0015] According to one embodiment of the utility model, one or more openings perpendicular to the inner hole and connected to the inner hole are provided on the main body, and the adhesive injected through the openings is used to connect the inner tube and the inner tube protection structure and seal the gap between the inner tube and the inner tube protection structure.

[0016] According to one embodiment of the utility model, the inner tube has a distal end, a middle section and a proximal end which are arranged in sequence, the inner sleeve is slidably mounted on the middle section of the inner tube, and the inner tube protection structure is fixedly mounted on the proximal end of the inner tube.

[0017] According to an embodiment of the utility model, the inner sleeve has a distal end and a proximal end which are arranged in sequence, and the proximal end of the inner sleeve is used for threaded connection with the pipe sleeve.

[0018] According to an embodiment of the utility model, the sleeve has a distal end and a proximal end which are arranged in sequence, the distal end of the sleeve is used for threaded connection with the inner sleeve, and the proximal end of the sleeve is used for receiving the inner tube protection structure.

[0019] According to one embodiment of the utility model, the inner tube assembly further includes:

[0020] a tube sleeve cap sleeved on the proximal end of the tube sleeve, the tube sleeve cap being threadedly connected to the tube sleeve; and

[0021] A sealing member is disposed between the sleeve and the sleeve cap.

[0022] According to one embodiment of the utility model, the inner tube assembly further includes:

[0023] a transmission seat fixedly connected to the pipe sleeve, wherein the transmission seat is sleeved outside a portion of the pipe sleeve; and

[0024] A housing engaged with the transmission seat, a portion of the sleeve and the sleeve cap are accommodated in the housing.

[0025] According to a second aspect of the present invention, a delivery member for an implant delivery system is provided, comprising:

[0026] Foreign control; and

[0027] The inner tube assembly described in the first aspect of the utility model has a portion of the inner tube assembly slidably sleeved inside the outer tube; the distal end of the inner tube can extend a predetermined length from the distal end of the outer tube; the predetermined length is less than or equal to the predetermined axial length of the anti-bending tube layer.

[0028] According to a third aspect of the present invention, there is provided an implant delivery system, comprising:

[0029] a delivery handle; and

[0030] The delivery component described in the second aspect of the utility model is connected to the delivery handle and extends from the delivery handle to the distal end.

[0031] According to an embodiment of the present invention, the conveying handle comprises a fixed shell having a non-circular inner contour, and a portion of the outer shell of the conveying member is fitted in the fixed shell in a shape-matched manner.

[0032] By adopting the above technical solution, the utility model has at least one of the following beneficial effects:

[0033] The implant delivery system and its inner tube assembly and delivery component provided by the utility model can provide support force for the proximal end of the inner tube by arranging an inner tube protection structure outside the proximal end of the inner tube, which helps to reduce or even avoid bending of the proximal end of the inner tube during implant delivery, especially bending during the process of withdrawing the inner tube to the distal end of the delivery catheter, thereby improving the service life.

[0034] The implant delivery system and its inner tube assembly and delivery member provided by the utility model can facilitate an operator to operate the inner tube by providing a handle portion on a portion of the inner tube protection structure extending beyond the inner tube, for example, facilitating the operator to hold the handle portion to perform an inner tube retraction operation.

[0035] The implant delivery system and its inner tube assembly and delivery member provided by the utility model can achieve fixation and sealing of the inner tube and the inner tube protection structure by arranging an opening on the main body of the inner tube protection structure that is connected to the inner hole fluid of the main body, and injecting an adhesive into the opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic diagram of the structure of a delivery component for an implant delivery system provided in one embodiment of the utility model;

[0038] Figure 2A and 2B for Figure 1 A partial schematic diagram of a delivery member for an implant delivery system is shown, wherein Figure 2A is the front view, Figure 2B is a side view;

[0039] Figure 3 This is a schematic structural diagram of an implant delivery system provided in one embodiment of the utility model.

[0040] Description of Reference Numerals

[0041] 1 inner tube; 11 distal end; 12 middle section; 13 proximal end; 14 plug; 2 inner sleeve; 21 distal end; 22 proximal end; 3 sleeve; 31 distal end; 32 proximal end; 4 inner tube protection structure; 41 main body; 42 handle; 43 axially extending through hole; 44 opening; 5 sleeve cap; 51 peripheral wall; 52 top wall; 6 sealing member; 7 transmission seat; 8 outer shell; 81 peripheral wall; 82 top wall; 9 valve; 10 valve fixing member; 100 outer tube; 200 delivery handle; 201 fixing shell. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the utility model clearer, the following is a further detailed description of the utility model embodiments in conjunction with specific embodiments and with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0043] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents recorded in the specification so as to facilitate the understanding and reading of technical personnel in this field, and are not used to limit the conditions under which the present application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should fall within the scope of the technical content disclosed in the present application.

[0044] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. The term "or" is usually used to include the meaning of "and / or", unless the content clearly indicates otherwise.

[0045] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. The terms "bottom", "top", "lower", "inside", and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0046] The utility model relates to an implant delivery system and an inner tube assembly and a delivery member for delivering an implant to a target position in a human body. The implant may be, for example, a valve prosthesis. This article takes the implant as an example of a valve prosthesis to illustrate the structure of the implant delivery system and its inner tube assembly and delivery member. However, it should be understood that the implant delivery system and its inner tube assembly and delivery member provided by the utility model are not limited to delivering valve prostheses, and other types of implants may also be delivered.

[0047] In the description of the present invention, the term "proximal end" refers to a relative position closer to the operator's operating end and farther from the target position in the human body, the term "distal end" refers to a relative position farther from the operator's operating end and closer to the target position in the human body, and the term "middle section" refers to a position between the proximal end and the distal end. The present invention is further described in detail below in conjunction with the accompanying drawings.

[0048] The first aspect of the present invention provides an inner tube assembly for an implant delivery system. Figure 1 and 2AAs shown, the inner tube assembly includes an inner tube 1, an inner sleeve 2, a sleeve 3 and an inner tube protection structure 4. The inner sleeve 2 is slidably sleeved on the outside of the inner tube 1, the sleeve 3 is connected to the outside of the proximal end of the inner sleeve 2, and the inner tube protection structure 4 is fixedly sleeved on the outside of the proximal end of the inner tube 1 and located inside a part of the sleeve 3. In other words, the inner tube protection structure 4 is arranged between the inner tube 1 and a part of the sleeve 3. The inner tube protection structure 4 forms an anti-bending tube layer of a predetermined axial length at the proximal end of the inner tube 1.

[0049] As mentioned in the background technology section, due to the limitation of the inner diameter of human blood vessels, the diameter and / or wall thickness of the multilayer pipeline in the implant delivery system are very small, especially the inner tube arranged near the axial position, which has the smallest inner diameter and the most fragile pipeline. In the process of the inner tube 1 withdrawing to the distal end of the delivery catheter, the inner tube 1 extends from the nearest end of the delivery handle (the delivery catheter is configured in the delivery handle device at the proximal end). Since it is relatively fragile, it is easy to bend during the extension process. For this reason, in the utility model, an inner tube protection structure 4 is provided at the proximal end of the inner tube 1 to form an anti-bending tube layer of a predetermined axial length at the proximal end of the inner tube 1, providing support force for the proximal end of the inner tube 1, thereby enhancing the anti-bending ability of the inner tube 1 in this part, so that the inner tube assembly provided by the utility model can effectively reduce or even avoid bending of this part of the inner tube 1 during the implant delivery process, especially bending during the withdrawal process of the inner tube 1, thereby improving the service life of the inner tube assembly as a whole.

[0050] like Figure 1 As shown, in the embodiment shown, the inner tube 1 has a distal end portion 11, a middle section 12 and a proximal end portion 13 arranged in sequence. The inner sleeve 2 is slidably sleeved on the middle section 12 of the inner tube 1, and the distal end portion 11 of the inner tube 1 extends out of the inner sleeve 2. The inner tube protection structure 4 is fixedly sleeved on the proximal end portion 13 of the inner tube 1. The inner sleeve 2 has a distal end portion 21 and a proximal end portion 22 arranged in sequence, and the outer side surface of the proximal end portion 22 is provided with an external thread for threaded connection with the sleeve 3. The sleeve 3 has a distal end portion 31 and a proximal end portion 32 arranged in sequence, and the inner side surface of the distal end portion 31 is provided with an internal thread for cooperating with the external thread arranged on the outer side surface of the inner sleeve 2 to realize the connection between the inner sleeve 2 and the sleeve 3, and the inner side of the proximal end portion 32 is used to receive the inner tube protection structure 4.

[0051] Preferably, the inner tube protection structure 4 can be configured in the form of a tube sleeve that can provide support for the inner tube 1. In some embodiments, the inner tube protection structure 4 can be configured in the form of a tube sleeve that surrounds the entire circumferential wall of the proximal portion 13 of the inner tube 1, that is, the inner tube protection structure 4 completely covers the circumferential wall of the proximal portion 13 of the inner tube 1. In other embodiments, the inner tube protection structure 4 can also be configured in the form of a tube sleeve that surrounds only a portion of the circumferential wall of the proximal portion 13 of the inner tube 1, that is, the inner tube protection structure 4 only partially covers the circumferential wall of the proximal portion 13 of the inner tube 1, for example, the inner tube protection structure 4 includes a plurality of arcuate sheets spaced apart from each other, and these arcuate sheets are used together to support the inner tube 1.

[0052] In some embodiments, the inner tube protection structure 4 includes a main body 41 sleeved on the outside of the inner tube 1 and a handle 42 axially extending from the main body 41 beyond the inner tube 1. The main body 41 has an inner hole for receiving the inner tube 1, and the main body 41 is used to provide support for the inner tube 1. The handle 42 is used to facilitate the operator to operate the inner tube 1. For example, after the implant is implanted in the target position of the human body, it is convenient for the operator to pull the inner tube 1 axially through the handle 42 to complete the withdrawal operation of the inner tube 1. In order to better achieve the above purpose, preferably, a radial protrusion is provided on the handle 42 for the operator to hold it. That is, in order to facilitate the operator to hold and apply force, the radial size of at least a part of the handle 42 is greater than the radial size (i.e., the outer diameter) of the main body 41. In other words, at least a part of the handle 42 protrudes radially outward relative to the main body 41.

[0053] In some embodiments, an axially extending through hole 43 is provided on the handle portion 42, and the axially extending through hole 43 is fluidically connected to the central hole of the inner tube 1. Liquid can be injected into the inner tube 1 through the axially extending through hole 43, for example, the air in the inner tube 1 can be emptied during use.

[0054] As mentioned in the background technology section, due to the limitation of the inner diameter of human blood vessels, the diameter and / or wall thickness of the multi-layer pipeline in the implant delivery system are very small, especially the inner tube arranged near the axis, which has the smallest inner diameter and is the most fragile. At the same time, the proximal end of the inner tube needs to move axially, and the handle that drives the inner tube to move needs to be fixed and sealed with the structure of the delivery handle. When the diameter of the inner tube is very small, the fixation and sealing between the handle and the delivery handle will also be difficult.

[0055] In order to solve the above-mentioned fixation and sealing problem between the handle portion and the delivery handle, in some embodiments, the main body portion 41 is provided with one or more openings 44 that are perpendicular to the inner hole and connected to the inner hole, and adhesive can be injected into the inner tube 1 and the inner tube protection structure 4 through the openings 44 to connect the inner tube 1 and the inner tube protection structure 4 and seal the gap between the inner tube 1 and the inner tube protection structure 4. In this way, the fixation and sealing of the inner tube 1 and the inner tube protection structure 4 can be simply achieved at the same time. Preferably, the plurality of openings 44 can be spaced apart from each other in the axial direction so as to ensure the injection effect. Figure 1 In the illustrated embodiment, five openings 44 are provided on the main body 41. Preferably, the adhesive may be a UV adhesive that can be cured under UV light.

[0056] In some embodiments, the inner tube assembly further comprises a sleeve cap 5 sleeved on the proximal end of the sleeve 3 and a seal 6 arranged between the sleeve 3 and the sleeve cap 5, the seal 6 being used to seal the gap between the sleeve 3 and the inner tube protection structure 4 to prevent blood from flowing out. Specifically, the sleeve cap 5 is threadedly connected to the sleeve 3. The sleeve cap 5 comprises a peripheral wall portion 51 and a top wall portion 52 connected to each other, and an inner thread is arranged on the inner side of the peripheral wall portion 51, which is adapted to the outer thread arranged on the outer wall of the sleeve 3. The top wall portion 52 is arranged perpendicular to the peripheral wall portion 51, and a through hole is arranged at the center of the top wall 42 to allow the inner tube protection structure 4 (specifically the main body 41) to pass through. The seal 6 can be arranged between the inner wall of the top wall 42 of the sleeve cap 5 and the end wall of the sleeve 3, or between the inner wall of the peripheral wall portion 51 of the sleeve cap 5 and the outer wall of the sleeve 3. The seal 6 can be arranged in the form of a sealing ring, for example.

[0057] In some embodiments, the inner tube assembly further comprises a transmission seat 7 fixedly connected to the pipe sleeve 3 and a shell 8 engaged with the transmission seat 7. The transmission seat 7 is sleeved on the outside of a portion of the pipe sleeve 3, and a portion of the pipe sleeve 3 and the pipe sleeve cap 5 are accommodated in the shell 8. In the illustrated embodiment, the transmission seat 7 is sleeved on the outside of the proximal portion 31 of the pipe sleeve 3. A fixing portion extending radially outward is provided on the distal portion 32 of the pipe sleeve 3, and the transmission seat 7 and the pipe sleeve 3 are connected via the fixing portion. For example, a connecting hole is provided on the fixing portion, and the fastener passes through the connecting hole to reach the transmission seat 7 to achieve the fixing of the transmission seat 7 and the pipe sleeve 3. The shell 8 is snap-fitted and connected to the transmission seat 7. In the illustrated embodiment, the shell 8 is sleeved on the proximal portion 32 of the pipe sleeve 3 and the outside of the pipe sleeve cap 5, covering the proximal portion 32 of the pipe sleeve 3 and the pipe sleeve cap 5. Specifically, the shell 8 includes a connected peripheral wall portion 81 and a top wall portion 82, the peripheral wall portion 81 is arranged at the proximal end portion 32 of the sleeve 3 and the outside of the sleeve cap 5, the top wall portion 82 is arranged perpendicular to the peripheral wall portion 81, and the center of the top wall portion 82 is provided with a through hole allowing the inner tube protection structure 4 (specifically the main body 41) to pass through, and the handle portion 42 of the inner tube protection structure 4 can abut against the top wall portion 82 of the shell 8, thereby achieving position limiting. During operation, the transmission seat 7 can be driven by the shell 8 to drive the sleeve 3 to move axially to assist in the implantation process. For example, in the embodiment shown, the end of the distal end portion 31 of the sleeve 3 is connected to the valve fixing member 10 for fixing the valve 9, and the release, expansion and withdrawal of the valve 9 and the withdrawal of the sleeve 3 can be achieved via the axial movement of the sleeve 3.

[0058] A second aspect of the present invention provides a delivery component for an implant delivery system. Figure 1 As shown, the conveying member includes an outer tube 100 and the inner tube assembly described above, and a part of the inner tube assembly is slidably sleeved inside the outer tube 100. Specifically, the distal end of the inner tube 1 of the inner tube assembly can extend a predetermined length from the distal end of the outer tube 100; the predetermined length is less than or equal to the predetermined axial length of the anti-bending tube layer. A chamber for accommodating the valve 9 is formed between the outer tube 100 and the inner tube 1 (specifically the distal end 11). A plug 14 is connected to the distal end of the inner tube 1, and the size of the plug 14 matches the size of the outer tube 100. In the initial stage of implantation, when the pipeline enters the blood vessel, the plug 14 plays a guiding role, and is used to seal the space between the outer tube 100 and the inner tube 1 when the inner tube is withdrawn and contacts the distal end of the outer tube 100, so as to prevent blood from flowing out of the body through the catheter.

[0059] The predetermined axial length is greater than or equal to the length of the distal end of the inner tube 1 extending from the distal end of the outer tube 100, so as to better protect the fragile section of the inner tube. In the process of the inner tube 1 withdrawing to the distal end of the delivery catheter (for example, the distal end of the outer tube 100), the axial movement distance of the inner tube 1 relative to the delivery catheter is roughly equal to the length of the distal end of the inner tube 1 extending from the distal end of the outer tube 100, that is, the length of the fragile section of the inner tube 1 is roughly equal to the length of the distal end of the inner tube 1 extending from the outer tube 100, so that after the fragile section of the inner tube 1 extends out of the proximal end of the delivery handle, the anti-bending tube layer is still not fully extended, so as to provide protection for the fragile section of the inner tube 1 and effectively prevent the inner tube from bending.

[0060] A third aspect of the present invention provides an implant delivery system. Figure 3 As shown, the implant delivery system includes a delivery handle 200 and the delivery member described above, and the delivery member is connected to the delivery handle 200. The delivery member extends from the delivery handle 200 to the distal end. Here, it should be noted that Figure 1 The right part of Figure 2A and Figure 2B The parts shown correspond to Figure 3 The right end part of .

[0061] In the illustrated embodiment, the delivery handle 200 includes a fixed shell 201, and the delivery member can move axially relative to the fixed shell 201. Specifically, a portion of the outer shell 8 of the delivery member is matched in shape and assembled in the fixed shell 201. Preferably, the outer contour shape of the outer shell 8 is set to be non-circular, and the inner contour shape of the fixed shell 201 is set to be a matching non-circular, thereby limiting the circumferential movement of the outer shell 8 during the axial movement of the outer shell 8.

[0062] The above are exemplary embodiments disclosed by the present utility model. The order disclosed in the above embodiments of the present utility model is only for description and does not represent the advantages and disadvantages of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope (including claims) disclosed in the embodiments of the present utility model is limited to these examples. Various changes and modifications may be made without departing from the scope defined in the claims. In addition, although the elements disclosed in the embodiments of the present utility model may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0063] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. An inner tube assembly for an implant delivery system, characterized in that: include: Inner tube; An inner sleeve, slidably sleeved on the outside of the inner tube; A sleeve connected to the outside of the proximal end of the inner sleeve; as well as The inner tube protection structure is fixedly sleeved outside the proximal end of the inner tube, and the inner tube protection structure is located between the sleeve and the inner tube to form an anti-bending tube layer with a predetermined axial length at the proximal end of the inner tube.

2. The inner tube assembly for an implant delivery system according to claim 1, characterized in that: The inner tube protection structure includes a main body portion sleeved on the outside of the inner tube and a handle portion extending axially from the main body portion beyond the inner tube. The main body portion has an inner hole for receiving the inner tube, and the portion of the main body portion excluding the inner hole is used to form the anti-bending tube layer.

3. The inner tube assembly for an implant delivery system according to claim 2, characterized in that: The handle portion is provided with a radial protrusion which is convenient for an operator to hold.

4. The inner tube assembly for an implant delivery system according to claim 2, characterized in that: The main body is provided with one or more openings perpendicular to the inner hole and connected to the inner hole, and the adhesive injected through the openings is used to connect the inner tube and the inner tube protection structure and seal the gap between the inner tube and the inner tube protection structure.

5. The inner tube assembly for an implant delivery system according to claim 2, characterized in that: The inner tube has a distal end, a middle section and a proximal end which are arranged in sequence, the inner sleeve is slidably sleeved on the middle section of the inner tube, and the inner tube protection structure is fixedly sleeved on the proximal end of the inner tube; and / or The inner sleeve has a distal end and a proximal end which are arranged in sequence, and the proximal end of the inner sleeve is used for threaded connection with the sleeve; and / or The sleeve has a distal end and a proximal end which are arranged in sequence. The distal end of the sleeve is used for threaded connection with the inner sleeve, and the proximal end of the sleeve is used for receiving the inner tube protection structure.

6. The inner tube assembly for an implant delivery system according to claim 2, characterized in that: Also includes: A pipe sleeve cap sleeved on the proximal end of the pipe sleeve, wherein the pipe sleeve cap is threadedly connected to the pipe sleeve; as well as A sealing member is disposed between the sleeve and the sleeve cap.

7. The inner tube assembly for an implant delivery system according to claim 6, characterized in that: Also includes: A transmission seat fixedly connected to the pipe sleeve, wherein the transmission seat is sleeved outside a portion of the pipe sleeve; as well as A housing engaged with the transmission seat, a portion of the sleeve and the sleeve cap are accommodated in the housing.

8. A delivery member for an implant delivery system, characterized in that: include: External pipe; as well as The inner tube assembly described in any one of claims 1-7, wherein a portion of the inner tube assembly is slidably sleeved inside the outer tube; the distal end of the inner tube can extend a predetermined length from the distal end of the outer tube; the predetermined length is less than or equal to a predetermined axial length of the anti-bending tube layer.

9. An implant delivery system, characterized in that: include: Delivery handle; as well as The delivery member of claim 8, wherein the delivery member is connected to the delivery handle and extends distally from the delivery handle.

10. The implant delivery system according to claim 9, characterized in that: The delivery handle comprises a fixed shell having a non-circular inner contour, and a portion of the outer shell of the delivery member is form-fitted into the fixed shell.

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