Delivery assembly, delivery system and loading method

Abstract

The application discloses a delivery assembly, a delivery system and a loading method. The delivery assembly comprises a delivery channel and an intermediate piece. The delivery channel comprises an inner sheath, an outer sheath and a sheath core tube. The intermediate piece comprises a plurality of first main channels penetrating through a proximal end face and a distal end face and / or a plurality of second main channels penetrating through an inner wall and an outer wall. In the loading process, the stent is detachably fixed on the intermediate piece through a soft wire. The delivery system comprises the above delivery assembly and a control assembly. The loading method comprises binding the proximal end of the stent on the intermediate piece through the soft wire in the loading stage, and releasing the soft wire after the loading is completed. In the application, the intermediate piece is arranged on the sheath core tube of the delivery assembly. In the loading process of the stent, the stent is detachably fixed on the intermediate piece through the soft wire. The intermediate piece tightens the stent, which prevents the stent from moving along with the outer sheath and prevents the stent from being shortened. After the loading process is completed, the soft wire can be removed, so that the soft wire does not affect the delivery process.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a delivery component, delivery system, and loading method. Background Technology

[0002] Generally, when using a support frame, it needs to be loaded into a conveyor assembly first, and then the conveyor assembly transports the support frame to the designated position before releasing it to perform its function. During loading, the support frame needs to be inserted into the sheath of the conveyor little by little. To make the support frame more flexible, it is usually designed without a keel. Therefore, once resistance is encountered, the support frame will shorten. In addition, because the support frame has self-expansion properties, it will press tightly against the sheath. Due to friction, the support frame and the sheath will move together during the assembly process, leading to assembly failure. Therefore, a conveyor assembly is needed that can solve the problems of support frame shortening or support frame and sheath moving together when loading a support frame in existing conveyor devices. Summary of the Invention

[0003] Therefore, the present invention provides a conveying component, a conveying system, and a loading method to solve the problem that the support shortens or the support and sheath move together when loading the support in existing conveying devices.

[0004] The technical solution adopted in this invention is:

[0005] A delivery assembly is provided, including a delivery channel comprising an inner sheath, an outer sheath, and a core sheath, the core sheath being inserted within the inner sheath with its distal end extending from the distal end of the inner sheath, the outer sheath being sleeved outside the inner sheath, and a gap between the outer sheath and the core sheath for mounting a support; an intermediate member disposed on the core sheath and located proximal to the gap, the intermediate member including a proximal end face, a distal end face opposite to the proximal end face, an inner wall near the core sheath, and an outer wall opposite to the inner wall, the intermediate member further including a plurality of first main channels penetrating the proximal end face and the distal end face and / or a plurality of second main channels penetrating the inner wall and the outer wall for inserting a flexible member to bind the support.

[0006] In one embodiment, multiple first main channels are parallel to each other.

[0007] In one embodiment, multiple second main channels are parallel or collinear with each other.

[0008] In one embodiment, the distal surface of the intermediate component is concave.

[0009] In one embodiment, an auxiliary component is also included, located at the far end of the conveying channel, the auxiliary component comprising two or more parallel branch channels.

[0010] In one embodiment, a fixing member is also included, the fixing member being located at the far end of the conveying channel, the fixing member having a plurality of secondary channels, the plurality of secondary channels being parallel or collinear with each other.

[0011] In one embodiment, the inner sheath is provided with an axially extending wiring channel.

[0012] A conveying system is also provided, including the conveying components described above, and a control component, the control component including a slider and a groove fixed to the outer sheath tube, wherein the slider moves along the groove to drive the outer sheath tube to move relative to the sheath core tube.

[0013] A loading method is also provided for loading the bracket into the delivery assembly, the steps of which are as follows:

[0014] S1 binds the proximal end of the stent to the intermediate component with a flexible wire. The first and second ends of the flexible wire extend and are taut along the same intermediate component channel or along mutually parallel intermediate component channels.

[0015] S2 keeps the position of the sheath core tube of the conveying component unchanged, while pushing the outer sheath tube of the conveying component to move towards the distal end until the outer sheath tube completely covers the support.

[0016] S3 releases one end of the cord and pulls the other end to retract the cord.

[0017] In one embodiment, step S1 further includes:

[0018] S11 The distal end of the bracket is attached to the fixing member by a pull wire. The first and second ends of the pull wire extend out along the same or parallel through holes of the fixing member. The first and second ends of the pull wire are kept taut, so that the distal part of the bracket is compressed radially onto the fixing member.

[0019] In one embodiment, step S3 further includes:

[0020] After the bracket reaches its destination, S31 partially releases the bracket. After confirming accurate positioning, either end of the pull wire is released to remove the pull wire, thereby fully releasing the bracket.

[0021] Beneficial effects of the embodiments of the present invention:

[0022] The conveying assembly of this invention, by setting an intermediate component on the sheath core tube of the conveying assembly, allows for the detachable fixing of the support to the intermediate component using a flexible cable during the loading process. The intermediate component tauts the support, preventing it from moving with the outer sheath tube and from shortening. After the loading process is completed, the flexible cable can be removed to maintain the simplicity of the device and avoid the cable interfering with the conveying process. The conveying system of this invention, utilizing the conveying assembly and the intermediate component, can reliably load the support. The control component of the conveying assembly can directly control the movement of the outer sheath tube for the loading process. The loading method of this invention provides a reliable method for loading supports using the intermediate component, preventing the support from shortening or moving with the outer sheath tube during loading. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the conveying system in Example 1;

[0024] Figure 2 This is a schematic diagram of the conveying component in Example 1;

[0025] Figure 3 This is a schematic diagram of the loading process of the lumen stent in Example 1;

[0026] Figure 4 This is a schematic diagram of the transportation process of the lumen stent in Example 1;

[0027] Figure 5 This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 1;

[0028] Figure 6 This is a wiring diagram of the middleware in another embodiment;

[0029] Figure 7 This is a force diagram showing the first contact state between the flexible wire and the support.

[0030] Figure 8 This is a force diagram showing the second contact state between the flexible wire and the support;

[0031] Figure 9 This is a force diagram showing the third contact state between the flexible wire and the support;

[0032] Figure 10 This is a force diagram showing the fourth contact state between the flexible wire and the support;

[0033] Figure 11 This is a schematic diagram of the longitudinal cross-sectional structure of the intermediate component in another embodiment;

[0034] Figure 12 This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 2;

[0035] Figure 13This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 3;

[0036] Figure 14 This is a structural schematic diagram of the intermediate component of the conveying assembly in Example 4;

[0037] Figure 15 This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 4;

[0038] Figure 16 This is a schematic diagram of the structure of the intermediate component of the conveying assembly in Example 5;

[0039] Figure 17 This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 5;

[0040] Figure 18 This is a schematic diagram of the operation of the conveying component during the loading stage in Embodiment 6;

[0041] Figure 19 This is a schematic diagram of the operation of the conveying component during the loading stage in Embodiment 7;

[0042] Figure 20 This is a schematic diagram of the operation of the delivery component during the release phase in Example 7;

[0043] Figure 21 This is a first-view working schematic diagram of the fixing component in the conveying assembly in Embodiment 7;

[0044] Figure 22 This is a second-view working schematic diagram of the fixing component in the conveying assembly in Embodiment 7;

[0045] Figure 23 This is a first-view working schematic diagram of the fixing component in the conveying assembly in Embodiment 8;

[0046] Figure 24 This is a second-view working schematic diagram of the fixing component in the conveying assembly in Embodiment 8. Detailed Implementation

[0047] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0048] In the description of this invention, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. If a feature is referred to as "set," "fixed," or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0049] In the description of the embodiments of the present invention, the term "several" means one or more, and the term "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number, while the terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features, and not as indicating or implying relative importance, the number of indicated technical features, or the order of the indicated technical features.

[0050] Furthermore, unless otherwise defined, the technical and scientific terms used in the embodiments of this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] It should be noted that in the field of interventional medical devices, the end of a medical device implanted in the human or animal body that is closer to the operator is generally called the "proximal end," and the end that is farther from the operator is called the "distal end." Based on this principle, the "proximal end" and "distal end" of any component of a medical device are defined. "Axial direction" generally refers to the length direction of the medical device during delivery, and "radial direction" generally refers to the direction of the medical device perpendicular to its "axial direction." Based on this principle, the "axial direction" and "radial direction" of any component of a medical device are defined.

[0052] For ease of description, the implant to be implanted in the embodiments involved in this application is a luminal stent.

[0053] Example 1

[0054] Example 1 provides a conveying component and a conveying system, as shown in the appendix to the specification. Figure 1-4 As shown, Figure 1 This is a schematic diagram of the conveying system 1 in Embodiment 1. Figure 2This is a schematic diagram of the conveying component 10 in Embodiment 1. Figure 3 This is a schematic diagram of the loading process of the lumen support 30 in Example 1. Figure 4 This is a schematic diagram of the transportation process of the lumen stent 30 in Embodiment 1. The delivery system 1 includes a delivery component 10 and a control component 20 for controlling the movement of the delivery component 10. In actual operation, the delivery component 10 is loaded with the lumen stent 30 to be delivered. The delivery component 10 transports the lumen stent 30 to be delivered to the designated position. The control component 20 controls the movement of the delivery component and releases the lumen stent 30 at the position, thus completing the entire implantation process.

[0055] The delivery assembly 10 includes a tube body 100, which includes an inner sheath tube 110, an outer sheath tube 120, and an inner sheath core tube 130. The outer sheath tube 120 is sleeved outside the inner sheath tube 110, and the inner sheath core tube 130 passes through the inner sheath tube 110 with its distal end extending out of the inner sheath tube 110. There is a gap between the inner sheath core tube 130 and the outer sheath tube 120 located outside the inner sheath tube 110.

[0056] The delivery assembly 10 tube body 100 also encloses a tip head 140 located at the distal end of the inner sheath core tube 130. The tip head 140 has a hollow design and is made of an X-ray impermeable material.

[0057] The control assembly 20 includes a slider 210 and a housing 220. The inner sheath 110 axially penetrates the proximal and distal end faces of the housing 220. The outer sheath 120 is fixedly connected to the slider 210 near its proximal end. When the slider 210 moves along the groove, it can drive the outer sheath 120 to move axially. Preferably, the control assembly 20 is in the form of a handle, on which multiple control units can be installed, wherein the slider 210 controls the axial movement of the outer sheath 120.

[0058] In another embodiment, while retaining the individual movement of the outer sheath 120 controlled by the slider 210, another slider is provided to achieve the overall movement of the tube body 100.

[0059] It should be noted that the slider is only a specific implementation of the conveying system 1 in this embodiment. The slider is selected in the conveying system 1 of this embodiment to realize the axial displacement of the outer sheath tube 120. This embodiment does not limit the use of sliders to achieve the purpose of controlling the axial displacement of the outer sheath tube 120.

[0060] In this embodiment, the lumen support 30 is in a compressed state during the delivery stage, changes from a compressed state to an expanded state during the release stage, and changes from an expanded state to a compressed state during the loading stage.

[0061] During the delivery phase, the lumen support 30 is loaded in the cavity between the distal end of the inner sheath core tube 130 and the distal end of the outer sheath tube 120, and contacts the outer surface of the inner sheath core tube 130. Throughout the delivery phase, the inner sheath tube 110, outer sheath tube 120, inner sheath core tube 130 and lumen support 30 move synchronously to ensure that the lumen support 30 can reach the predetermined position.

[0062] During the release phase, the outer sheath 120 moves axially toward the proximal end relative to the inner sheath core 130, and the lumen support 30 gradually expands as the outer sheath 120 retracts until it is finally released into a naturally expanded state.

[0063] During the loading phase, the outer sheath 120 moves axially toward the distal end relative to the inner sheath core 130. The lumen support 30 gradually compresses as the outer sheath 120 advances until it is fully compressed. Since the lumen support 30 is initially in an expanded state, a portion of the lumen support 30 presses against the outer sheath 120. Without external force, the movement of the outer sheath 120 can easily drive the lumen support 120 to move, causing the lumen support 120 and the outer sheath 120 to move together. This can lead to the lumen support 120 shortening or displacement, resulting in assembly failure. Therefore, to solve this problem, an intermediate component 150 is used in this embodiment.

[0064] In this embodiment, the intermediate component 150 is located at the distal end of the inner sheath core tube 130. The intermediate component 150 is preferably fixed on the outer surface of the inner sheath core tube 130 that is not covered by the inner sheath tube 110. The loading section on the inner sheath core tube 130 is defined by the installation position of the lumen support 30 (i.e., the gap between the inner sheath core tube 130 and the outer sheath tube 120). The intermediate component 150 is located at the proximal end of the loading section, and the tip head 140 is located at the distal end of the loading section.

[0065] During loading of the lumen support 130, a flexible component is used to fix the lumen support 30 to the intermediate component 150, thus ensuring that the lumen support 30 is already fixed to the intermediate component 150 during pre-assembly. In this embodiment, a flexible wire is used as the flexible component. During loading, since the lumen support 30 is fixed to the intermediate component 150 located near the loading section, when the outer sheath tube 120 moves axially toward the distal end relative to the inner sheath core tube 130, the lumen support 30 will not move with the outer sheath tube 120 and thus ensure the normal progress of loading.

[0066] It should be noted that in this embodiment, the flexible wire is bound to the bare corrugated coil of the lumen stent 30 to make it easier to explain the binding method of the flexible wire. In another embodiment, small holes can be provided on the membrane of the lumen stent 30, and the flexible wire passes through the small holes to bind the lumen stent 30. In another embodiment, the crest of the lumen stent 30 is not attached to the membrane so that the flexible wire can pass through to achieve binding.

[0067] Since the flexible suture 40 needs to be properly withdrawn after the loading process, its material should be either a polymer or a metal. Polymer materials offer better flexibility and a smaller diameter compared to metal materials (such as nickel-titanium filaments), making the flexible suture 40 easier to withdraw without affecting the support structure. Therefore, polymer materials are preferred for the flexible suture 40, including but not limited to PTFE sutures and polyester sutures. However, it is worth noting that because the flexible suture 40 is used to fix the lumen support 30, it is prone to entanglement with the bare corrugated portion of the lumen support 30. This results in significant friction between the flexible suture 40 and the lumen support 30 during withdrawal, leading to difficulty in withdrawal or even breakage of the flexible suture. Therefore, the structure of the intermediate component 150 needs to be appropriately designed to minimize or eliminate contact between the flexible suture 40 and the lumen support 30, and to prevent the flexible suture 40 from twisting relative to the corrugated portion of the lumen support 30.

[0068] To meet the above requirements, the structural design and wiring method of the middleware 150 are as follows:

[0069] Refer to the instruction manual appendix Figure 5 , Figure 5 This is a schematic diagram of the wiring of the intermediate component 150 of the conveying assembly 10 in Embodiment 1. The intermediate component 150 is a rotating structure including a hollow channel 1500 through which the inner sheath core tube passes. In addition, the intermediate component 150 is provided with at least three channels that are separated from each other and parallel to each other, which are referred to as channel 1501, channel 1502 and channel 1503 respectively. In order to prevent the edges of the through holes from being worn or the soft wire 40 from being pulled, the edges of the through holes are rounded.

[0070] The specific wiring method for the intermediate component 150 is as follows: the flexible wire 40 passes through the inside of the lumen support, through the channel 1501 of the intermediate component 150, then through the channel 1502, and then around the bare corrugated coil (one or more) of the lumen support. The flexible wire then enters and passes through the channel 1503, then passes back through the channel 1501 and exits from the inner cavity of the support. The position where the flexible wire 40 leaves the previous channel and enters the next channel is on the same surface of the intermediate component 150.

[0071] In another embodiment, to ensure the force balance between the flexible cord 40 and the lumen support, refer to the appendix of the specification. Figure 6 As shown, attached Figure 6This is a schematic diagram of the wiring of the intermediate component 151 in another embodiment. The wiring method of the flexible wire 40 in the intermediate component 151 is the same as in embodiment 1, except that the position of the flexible wire contacting the bare corrugated coil of the lumen support is closer to the axis of the intermediate component 151. Preferably, the flexible wire 40 enters and exits the intermediate component 151 along the channel 1511. The line connecting the centers of the openings at the same end of the channels 1513 and 1512 intersects the axis of the intermediate component 151, and the corresponding sheath core tube is provided with a clearance groove or clearance hole for the flexible wire to pass through.

[0072] In this embodiment, after the wiring is completed, both ends of the flexible wire 40 extend to the outside from the same direction through the same through hole. Simultaneously, the ends of the flexible wire 40 are gently pulled to taut the portion of the wire between holes 1501 and 1502, thus fixing the lumen support to the intermediate member 150. At this time, the outer sheath tube 120 moves axially towards the distal end relative to the inner sheath core tube 130. The bare corrugated coil of the lumen support is fixed by the taut flexible wire 40, preventing displacement with the outer sheath tube 120 and ensuring the normal loading of the lumen support. After loading is completed, the flexible wire 40 is released and removed.

[0073] The relative relationship between the flexible cord and the bare corrugated coil of the lumen stent is as follows: Figure 7-10 The above, Figure 7 This is a force diagram showing the force between the flexible wire and the lumen support in the first contact state. Figure 8 This is a force diagram showing the second contact state between the flexible wire and the lumen support. Figure 9 This is a force diagram showing the third contact state between the flexible wire and the lumen support. Figure 10 This is a force diagram of the flexible wire and the lumen support in the fourth contact state. F1 is the friction force between the flexible wire and the bare corrugated coil 301 of the lumen support, and F2 is the pulling force required to remove the flexible wire 40. In order to facilitate the removal of the flexible wire 40, the smaller the value of F2, the easier it is to remove the flexible wire 40. Therefore, the friction force F1 should be smaller.

[0074] When the flexible cord 40 is taut, the bare wave coil 301 is fixed. At this time, the bare wave coil 301 has both a tendency to expand and return to its original shape, and a tendency to move with the outer sheath (the outer sheath moves relative to the inner sheath to load the support). The tension of the flexible cord 40 is along its own direction and is equal everywhere. Taking the upper contact point between the flexible cord 40 and the bare wave coil 301 as the base point, the flexible cord 40 includes a first segment to the left of the base point and a second segment to the right of the base point. The pressure between the flexible wire 40 and the bare wave coil 301 determines the friction between them. The pressure between the flexible wire 40 and the bare wave coil 301 is the sum of the component of the tension on the first segment of the flexible wire 40 towards the center of the bare wave coil 301 and the component of the tension on the second segment of the flexible wire 40 towards the center of the bare wave coil 301. In specific situations, the smaller the angle between the first and second segments of the flexible wire 40, the greater the sum of the components of the tension on the first segment of the flexible wire 40 towards the center of the bare wave coil 301 and the component of the tension on the second segment of the flexible wire 40 towards the center of the bare wave coil 301, and the greater the friction that needs to be overcome when withdrawing the flexible wire 40.

[0075] Therefore, from Figures 7 to 9 The value of F1 gradually increases, and in Figure 9 In cases where the flexible cord 40 passes through the bare corrugated coil 301 of the lumen support, the two ends of the flexible cord 40 are parallel to each other or form a small angle with each other, which can easily lead to... Figure 10 In the case of entanglement, the friction of the flexible wire 40 itself will cause the flexible wire 40 to lock up, making it impossible to withdraw.

[0076] In this embodiment, the flexible wire 40 runs along the direction of channel 1501 – bare wave loop of the lumen support – channel 1502. Since the bare wave loop of the lumen support is very close to the intermediate member 150, the included angle between the two sides of the flexible wire 40 located on the adjacent sides of the bare wave loop is large (preferably greater than 90°). After the flexible wire 40 is straightened, the friction between the flexible wire and the lumen support is small. Furthermore, since the flexible wire 40 passes through the first and second sides of the bare wave loop of the lumen support along two different channels, the flexible wire 40 will not entangle.

[0077] In another embodiment, the surface of the intermediate member near the lumen support is concave (i.e., the distal end face of the intermediate member is concave), such as... Figure 11 As shown, Figure 11 This is a schematic diagram of the longitudinal section structure of the intermediate component in another embodiment. With this configuration, the intermediate component and the lumen support partially overlap axially. Specifically, the end of the bare corrugated coil 301 of the lumen support is located within the concave cavity formed by the concave surface of the intermediate component. This avoids axial gaps between the lumen support and the intermediate component, which could cause the outer sheath to bend at these gaps, leading to a higher risk of breakage at the bend location when the support is released.

[0078] Example 2

[0079] The parts of the conveying components and conveying system in Example 2 that are the same as those in Example 1 will not be described again here. The main difference between the two is that, for example... Figure 12 As shown, Figure 12 This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 2. To avoid tangling of the flexible wire 40 when it first enters the intermediate component 250 and when it finally leaves the intermediate component 250 and returns to the starting position, the intermediate component 250 in Embodiment 2 is provided with four channels, namely channel 2501, channel 2502, channel 2503 and channel 2504, and their specific wiring method is as follows:

[0080] The flexible wire 40 is passed through the inside of the lumen support, through the channel 2503 of the intermediate member 250, then through the channel 2501, and then around the bare corrugated coil (one or more) of the lumen support. The flexible wire 40 then passes through the channel 2502, and then exits from the channel 2504 and passes back into the lumen of the support. The position where the flexible wire 40 leaves the previous channel and enters the next channel is on the same surface of the intermediate member 250.

[0081] Example 3

[0082] The parts of the conveying assembly and system in Example 3 that are the same as those in Example 1 will not be described again here. The main difference is that the intermediate component has a partial or complete protrusion on the side near the lumen support, and the protrusion has a circumferential channel, such as... Figure 13 As shown, Figure 13 This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 3. The protrusion 351 can be multiple partial protrusions or an overall protrusion. The protrusion 351 is provided with horizontal or diagonal channels. In this embodiment, two horizontally arranged channels are used as an example. Channels 3501 and 3502 are arranged opposite to each other, and their wiring method is as follows:

[0083] The flexible wire 40 passes through the inside of the lumen support, radially from the outside to the inside through the channel 3501 of the intermediate member 350, and then around the bare corrugated ring (one or more) of the lumen support. The flexible wire 40 then passes radially from the inside to the outside through the channel 3502 and back through the inner cavity of the support. The position where the flexible wire 40 leaves the previous channel and enters the next channel is on the same surface of the intermediate member 350.

[0084] When the two ends of the flexible wire 40 are pulled, the flexible wire 40 is taut through the first and second sides of the bare wavering of the lumen support, with an included angle of nearly 180° between them, and the friction between the flexible wire 40 and the bare wavering of the lumen support is close to 0.

[0085] Example 4

[0086] The parts of the conveying assembly and system in Example 4 that are the same as those in Example 3 will not be described again here. The main difference is that the intermediate component is provided with at least two axial channels, such as... Figure 14-15 As shown, Figure 14 This is a structural schematic diagram of the intermediate component of the conveying assembly in Embodiment 4. Figure 15 This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 4. The intermediate component 450 is provided with two axial channels and two circumferential channels. The circumferential channels are channel 4501 and channel 4502, and the axial channels are channel 4503 and channel 4504. The wiring method is as follows:

[0087] The flexible wire 40 passes through the inside of the lumen support, radially from the outside to the inside through the channel 4501 of the intermediate member 450, then through the channel 4503, and then around the bare corrugated coil (one or more) of the lumen support. The flexible wire 40 then passes through the channel 4504, and then exits radially from the inside to the outside through the channel 4502 and returns from the inner cavity of the support. The position where the flexible wire 40 leaves the previous channel and enters the next channel is on the same surface of the intermediate member 450.

[0088] When the two ends of the flexible wire 40 are pulled, the flexible wire 40 is taut through the first and second sides of the bare wavering of the lumen support, with an included angle of nearly 180° between them, and the friction between the flexible wire 40 and the bare wavering of the lumen support is close to 0.

[0089] In this embodiment, while ensuring that the distance between the inlet side of the flexible cable 40 when it first enters the intermediate member 450 and the outlet side when it finally leaves the intermediate member 450 and returns to the starting position is as far as possible, an intermediate member 450 with axial channels of different spacing can be selected when different support structures or conveying environments need to be addressed.

[0090] Example 5

[0091] The parts of the conveying assembly and system in Example 5 that are the same as those in Example 1 will not be described again here. The main difference is that both sides of the intermediate component have partial or integral protrusions, and the protrusions have circumferential channels, such as... Figure 16-17 As shown, Figure 16 This is a structural schematic diagram of the intermediate component of the conveying assembly in Embodiment 5. Figure 17 This is a schematic diagram of the wiring of the intermediate component of the conveying assembly in Embodiment 5. Both sides of the intermediate component 550 have protrusions, denoted as protrusion 551 and protrusion 552 respectively. In this embodiment, protrusion 551 has two oppositely arranged circumferential channels, namely channel 5501 and channel 5502, and protrusion 5502 has two oppositely arranged circumferential channels, namely channel 5503 and channel 5504. The wiring method is as follows:

[0092] The flexible wire 40 passes through the inside of the lumen support, radially from the inside to the outside through the channel 5501 of the intermediate member 550, then radially from the outside to the inside through the channel 5503, and then around the bare corrugated coil (one or more) of the lumen support. The flexible wire 40 then radially from the inside to the outside through the channel 5505, and then radially from the outside to the inside through the channel 5502 and back through the inner cavity of the support. The position where the flexible wire 40 leaves the previous channel and enters the next channel is on the same surface of the intermediate member 550.

[0093] When the two ends of the flexible wire 40 are pulled, the flexible wire 40 is taut through the first and second sides of the bare wavering of the lumen support, with an included angle of nearly 180° between them, and the friction between the flexible wire 40 and the bare wavering of the lumen support is close to 0.

[0094] Example 6

[0095] The parts of the conveying assembly and system in Example 6 that are the same as those in Example 1 will not be described again here. The main difference is that, without changing the position of the original intermediate component, an intermediate component is added at the tip end of the conveyor, such as... Figure 18 As shown, Figure 18 This is a schematic diagram of the operation of the conveying component in the loading stage of Embodiment 6. The first intermediate component 650 serves to fix the cavity support 30. The second intermediate component 660 is provided with two separate channels, which separate the wire 40 from the inlet side of the first entry into the intermediate component 650 and the outlet side of the wire 40 when it finally leaves the intermediate component 650 and returns to the starting position, so as to prevent the wire 40 from getting tangled.

[0096] Example 7

[0097] The parts of the conveying assembly and system in Example 7 that are the same as those in Example 1 will not be described again here. The main difference is that the inner sheath tube has a channel through which the flexible wire can pass, and an additional intermediate component (referred to as a fixing component for distinction) and a tip head are both located at the far end of the loading section, that is, the fixing component and the tip head are located on the same side of the lumen support. Specifically, as shown... Figures 19-20 As shown, Figure 19 This is a schematic diagram of the operation of the conveying component during the loading stage in Embodiment 7. Figure 20 This is a schematic diagram of the operation of the delivery component in the release stage of Embodiment 7. The fixing member 760 can be any intermediate component structure in Embodiments 1-5. In this embodiment, the fixing member 760 is selected from the intermediate component structure in Embodiment 1.

[0098] In this embodiment, multiple circumferentially distributed corrugated coils on the tip head side are mounted and fixed to the fixing member 760 using a pull wire 41. Both ends of the pull wire 41 can pass through the inner sheath tube 710 (the inner sheath tube has several axially arranged cable routing channels for flexible wires to pass through), facilitating operation by the user outside the conveying assembly or conveying system. Due to the fixing effect of the fixing member 760, during the release of the lumen support, the corrugated coils near the tip head end of the support are contracted, so the support will not adhere to the wall when a small portion is released. In other words, in the initial stage of the lumen support release, the expansion of the support is controlled by the operator. At this time, the position of the support can be adjusted appropriately to make the positioning of the support more accurate and avoid the need to retrieve the entire support due to inaccurate initial positioning.

[0099] Refer to the method of mounting the carrier ring on the 760 fastener. Figure 21-22 , Figure 21 This is a first-view working schematic diagram of the fixing component in the conveying assembly in Embodiment 7. Figure 22 This is a second-view schematic diagram of the fixing member in the conveying assembly of Embodiment 7. For greater clarity, the hollow channel portion of the fixing member 760 has been omitted from the corresponding drawing.

[0100] The pull wire 41 passes through channels 7601, 7602, 301, 7603, and 7601 in sequence. The specific wiring method is similar to that in Embodiment 1. The pull wire 41 hangs the bare wave coil 301 of the lumen stent 30 on the fixing member 760 and pulls it in. Specifically, the pull wire 41 passes through multiple peaks on the bare wave coil 301. After the pull wire 41 is tightened, the bare wave coil 301 is hung on the fixing member 760. The tightening of the pull wire 41 causes the lumen stent 30 to be subjected to radial force. When the lumen stent 30 is partially released, it is in a semi-expanded state due to the tension of the pull wire 41. At this time, the lumen stent 30 does not directly contact the blood vessel wall, and the operator can make fine adjustments or positioning of the position of the lumen stent 30.

[0101] To ensure balanced force distribution, in this embodiment, the peaks through which the pull wire 41 passes through the bare wave loop 301 satisfy the following conditions: the peaks through which the pull wire 41 passes are the first peaks, and the first peaks are adjacent to each other with an equal number of second peaks 302.

[0102] Example 8

[0103] The parts of the conveying assembly and system in Example 8 that are the same as those in Example 7 will not be described again here. The main difference is that the way the fixing element hangs the tube support is different. Refer to... Figure 23-24 , Figure 23 This is a first-view working schematic diagram of the fixing component in the conveying assembly in Embodiment 8. Figure 22 This is a second-view working schematic diagram of the fixing component in the conveying assembly in Embodiment 8.

[0104] The cable 41 passes through channel 7601, channel 7602, wave loop 301, channel 7603, and channel 7601 in sequence. The specific routing method is similar to that in embodiment 7.

[0105] The pull wire 41 hangs all the peaks of the bare corrugated ring of the lumen support 30 on the fixing member 760 and gathers them together. That is, the pull wire 41 passes through all the peaks 303 of the lumen support 30 and pulls all the adjacent peaks 303 together in series, so that the end of the lumen support 30 near the fixing member 760 is compressed by force. Compared with embodiment 7, the force of the pull wire 41 on the lumen support 30 is more uniform in this embodiment.

[0106] It should be noted that, for Embodiments 7 and 8, the structure of the fastener 760 can be selected in various ways, including but not limited to the structure of the intermediate component similar to that in Embodiments 1-5. The fasteners in Embodiments 7 and 8 use the structure of the intermediate component in Embodiments 1-5 to take advantage of the effect of the intermediate component in the previous embodiments that facilitates the removal of the flexible wire. It cannot be assumed that the structure of the fastener 760 is the same as the structure of the intermediate component, which is a necessary technical feature for realizing this solution.

[0107] Furthermore, in Embodiments 7 and 8, since the flexible wire structure of the near-end intermediate component 750 only functions during assembly, it can preferably be removed after assembly. That is, the flexible wire 40 can be removed after loading is complete. Furthermore, the intermediate component 750 can also be removed, thereby making the system simpler (e.g., ...). Figure 20 As shown in the figure, the risk of problems during use is smaller, allowing the conveyor to simultaneously fulfill the functions of conveying and adjusting position.

[0108] In conclusion, for Embodiments 7 and 8, there is a conveying method in which, before the loading stage of the bracket, the proximal end of the bracket is bound to the intermediate component with a flexible cord. The first and second ends of the flexible cord extend out along the same or parallel intermediate component channels and are taut. At the same time, during this stage, the distal end of the bracket is bound to the fixing component with a pull wire. The first and second ends of the pull wire extend out along the same or parallel fixing component channels and are kept taut, thereby compressing the distal end of the bracket radially onto the fixing component. Then, the bracket is loaded. After the bracket is loaded, either end of the flexible cord is released to remove the cord. The bracket is then transported to the designated destination and then partially released. At this time, the distal end of the bracket is still in a retracted state. After confirming that the bracket is in an accurate position, one end of the pull wire is released to remove the pull wire, thereby completely releasing the bracket.

[0109] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0110] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application. Furthermore, unless otherwise specified, the embodiments of the present invention and the features described therein can be combined with each other.

Claims

1. A conveying assembly, characterized in that, include The conveying channel includes an inner sheath, an outer sheath, and a core sheath. The core sheath is inserted inside the inner sheath, and the distal end of the core sheath extends from the distal end of the inner sheath. The outer sheath is sleeved outside the inner sheath, and there is a gap between the outer sheath and the core sheath for loading a support. An intermediate component is disposed on the sheath core tube and located at the proximal end of the gap. The intermediate component includes a proximal end face, a distal end face opposite to the proximal end face, an inner wall near the sheath core tube, and an outer wall opposite to the inner wall. The intermediate component also includes multiple first main channels penetrating the proximal end face and the distal end face and / or multiple second main channels penetrating the inner wall and the outer wall for threading a flexible wire to bind the support. The flexible wire passes through the intermediate component along the first main channel and / or the second main channel, and after the flexible wire bypasses multiple peaks on the same wave loop of the support to be transported, it passes through the intermediate component along the first main channel and / or the second main channel. The contact point between the flexible wire and the support is a base point, such that the included angle between the two segments of the flexible wire located on both sides of the base point is greater than 90°.

2. The conveying assembly according to claim 1, characterized in that, Multiple first main channels are parallel to each other.

3. The conveying assembly according to claim 1, characterized in that, Multiple second main channels are parallel or collinear with each other.

4. The conveying assembly according to claim 1, characterized in that, The distal surface of the intermediate component is concave.

5. The conveying assembly according to claim 1, characterized in that, It also includes auxiliary components located at the far end of the conveying channel, the auxiliary components including two or more parallel branch channels.

6. The conveying assembly according to claim 1, characterized in that, It also includes a fixing component located at the far end of the conveying channel, the fixing component having multiple secondary channels that are parallel or collinear with each other.

7. The conveying assembly according to claim 6, characterized in that, The inner sheath is provided with a wiring channel extending along the axial direction.

8. A conveying system, characterized in that, The delivery assembly, including any one of claims 1-6, further includes a control assembly, the control assembly including a slider and a groove fixed to the outer sheath tube, wherein the slider moves along the groove to drive the outer sheath tube to move relative to the sheath core tube.

9. A loading method for loading a support into a delivery assembly as described in any one of claims 1-6, comprising the following steps: S1 binds the proximal end of the stent to the intermediate component with a flexible wire. The first and second ends of the flexible wire extend and are taut along the same intermediate component channel or along parallel intermediate component channels respectively. The contact point between the flexible wire and the stent is the base point, so that the included angle between the two segments of the flexible wire located on both sides of the base point is greater than 90°. S2 keeps the position of the sheath core tube of the conveying component unchanged, while pushing the outer sheath tube of the conveying component to move towards the distal end until the outer sheath tube completely covers the support. S3 releases one end of the cord and pulls the other end to retract the cord.

10. The method for loading the bracket according to claim 9, characterized in that, Step S1 also includes: S11 The distal end of the bracket is attached to the fixing member by a pull wire. The first and second ends of the pull wire extend out along the same or parallel through holes of the fixing member. The first and second ends of the pull wire are kept taut, so that the distal part of the bracket is compressed radially onto the fixing member.

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