Conveying device and conveying system

Abstract

The invention relates to a conveying device and a conveying system. The delivery device includes: an inner tube; the outer tube is arranged outside the inner tube in a sleeving mode and can move in the axial direction of the inner tube relative to the inner tube, and a containing space capable of containing an implant is defined by the outer wall of the inner tube and the inner wall of the outer tube; the bending adjusting piece is arranged between the inner tube and the outer tube, at least part of the bending adjusting piece is located in the containing space, and the bending adjusting piece is connected with the inner tube and can drive the near end of the inner tube and the implant to be bent. The near end of the conveying device can smoothly enter the target blood vessel and is matched with the bent shape of the target blood vessel, after the implant is released by the outer tube, it can be guaranteed that the implant is tightly attached to the inner wall of the target blood vessel, the implanting difficulty of the implant is reduced, the implanting accuracy of the implant is guaranteed, and therefore the treatment effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a delivery device and a delivery system. Background Art

[0002] Among aortic diseases such as aortic aneurysm and aortic dissection, they are one of the most fatal and difficult-to-treat vascular surgery diseases. Endovascular Aneurysm Repair (EVAR) is an effective means for treating diseases such as aortic dissection and aortic aneurysm. Compared with open surgery, endovascular aneurysm repair has significant advantages such as less trauma and fewer complications. Endovascular aneurysm repair mainly delivers a covered stent through a delivery system, so that the covered stent reaches the diseased aorta, thereby achieving the treatment purpose.

[0003] However, in some scenarios, due to the tortuous shape of the diseased blood vessel, the formation of large bend angles, etc., it brings great challenges to maintaining good wall apposition after the release of the covered stent. In addition, the covered stent itself has a certain stiffness, and in a bent state, a straightening force that resists bending will be generated, thereby reducing the flexibility of the covered stent. Similarly, the support components such as the inner tube in the delivery system also have poor flexibility. When the covered stent is installed on the inner tube, the stiffness of the two will be superimposed, making the flexibility of the delivery system even worse, increasing the difficulty of closely fitting the covered stent with the blood vessel wall after release. Summary of the Invention

[0004] Based on this, in view of the problem that the poor flexibility of the current delivery device and the covered stent leads to poor wall apposition between the covered stent and the inner wall of the blood vessel, it is necessary to provide a delivery device and a delivery system. After the proximal end of the delivery device is moved into the target blood vessel, it can conform to the bending shape of the target blood vessel, and then when releasing the implant, it can improve the wall apposition between the implant and the inner wall of the target blood vessel, reduce the implantation difficulty of the implant, facilitate the tight fit between the implant and the inner wall of the target blood vessel, and ensure the treatment effect.

[0005] A delivery device, the delivery device comprising:

[0006] An inner tube;

[0007] An outer tube, sleeved outside the inner tube and capable of moving axially along the inner tube, and an accommodation space for accommodating an implant is defined between the outer wall of the inner tube and the inner wall of the outer tube; and

[0008] A bending adjustment member, disposed between the inner tube and the outer tube and at least partially located in the accommodation space, the bending adjustment member is connected to the inner tube and can drive the proximal end of the inner tube and the implant to bend.

[0009] In one embodiment of the present application, the central axis of the bending member is parallel to the central axis of the inner tube;

[0010] and / or, the central axis of the bending member is spaced apart from the central axis of the inner tube in the radial direction of the inner tube;

[0011] and / or, the outer wall of the proximal end of the inner tube and the inner wall of the proximal end of the outer tube enclose the accommodating space, and the bending member can drive the proximal end of the inner tube and the implant to bend.

[0012] In one embodiment of the present application, the delivery device further includes a mounting member disposed on the outer wall of the inner tube, and the bending member is connected to the mounting member.

[0013] In one embodiment of the present application, the number of the mounting members is multiple:

[0014] The multiple mounting members are spaced apart along the axial direction of the inner tube, and each mounting member is connected to the bending member;

[0015] The axial distance between any two adjacent mounting members is a fixed value.

[0016] In one embodiment of the present application, the mounting member includes a first mounting member and at least one second mounting member. The first mounting member is disposed near the proximal end of the inner tube, and all the second mounting members are located between the first mounting member and the distal end of the inner tube. The proximal end of the bending member is fixedly connected to the first mounting member and is movably connected to all the second mounting members.

[0017] In one embodiment of the present application, the number of the bending members is multiple, and the multiple bending members are spaced apart along the circumferential direction of the inner tube; and / or,

[0018] The delivery device further includes a limiting member located between the outer wall of the inner tube and the inner wall of the outer tube, and the proximal end of the limiting member is used for detachably connecting to the implant.

[0019] In one embodiment of the present application, the delivery device further includes a support tube located inside the outer tube, sleeved outside the inner tube, and the support tube is located at the distal end of the accommodating space.

[0020] In one embodiment of the present application, the support tube can move distally along the axial direction of the inner tube relative to the inner tube; and / or,

[0021] The support tube has a wire routing channel that runs through along the axial direction of the support tube, and part of the bending members are located in the wire routing channel.

[0022] In an embodiment of the present application, the delivery device further includes a control handle, which includes a first control part and a second control part: the first control part is connected to the distal end of the outer tube and controls the axial movement of the outer tube relative to the inner tube; the second control part is connected to the distal end of the bending member and controls the bending member to drive the inner tube and the implant to bend.

[0023] A delivery system includes an implant and the delivery device according to any one of the above technical features. The implant is loaded in the accommodation space of the delivery device in a contracted configuration, and the implant is detachably connected to the inner tube.

[0024] After adopting the above technical solutions, the present application has at least the following technical effects:

[0025] In the delivery device and the delivery system of the present application, in the delivery device, the outer tube is sleeved outside the inner tube, and the inner wall of the outer tube and the outer wall of the inner tube form an accommodation space. The implant is loaded in the accommodation space in a contracted configuration. When the delivery device delivers the implant, its proximal end can move to the target blood vessel, and the outer tube can move axially relative to the inner tube towards the distal end to release the implant into the target blood vessel. In order to ensure the wall attachment of the implant to the target blood vessel, a bending member is provided between the inner tube and the outer tube. The bending member is at least partially located in the accommodation space and is connected to the inner tube. The bending member can drive the proximal end of the inner tube, the implant, and the proximal end of the outer tube to bend, so that the proximal end of the delivery device conforms to the bending shape of the target blood vessel, and further enables the released implant to abut against the inner wall of the target blood vessel. In addition, by arranging the bending member on the inner tube, the bending of the proximal end of the inner tube and the implant by the bending member can be realized throughout the process, further optimizing the release effect of the implant in the target blood vessel.

[0026] In this delivery device, the proximal end of the inner tube is connected by a bending member, and the bending member is used to control the proximal end of the inner tube to drive the implant and the proximal end of the outer tube to bend. When the target blood vessel has a large bending angle, the bending member drives the proximal end of the inner tube to bend, and then the inner tube can drive the implant and the proximal end of the outer tube to bend synchronously to increase the flexibility of the inner tube, the implant, and the outer tube, thereby increasing the flexibility of the proximal end of the delivery device. In this way, the proximal end of the delivery device can smoothly enter the target blood vessel and conform to the bending shape of the target blood vessel. After the outer tube releases the implant, it can ensure that the implant tightly adheres to the inner wall of the target blood vessel, reduce the implantation difficulty of the implant, ensure the accuracy of implant implantation, and thus ensure the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the proximal end of the delivery device loading the implant in an embodiment of the present application.

[0028] Figure 2 is Figure 1Schematic diagram of removing the outer tube at the proximal end of the shown delivery device.

[0029] Figure 3 For Figure 1 Schematic diagram of moving the proximal end of the shown delivery device to the target blood vessel and conforming to the curved shape of the target blood vessel.

[0030] Figure 4 For Figure 1 Schematic diagram of the implant conforming to the target blood vessel after the implant is released by the shown delivery device.

[0031] Wherein: 100, delivery device; 110, inner tube; 120, outer tube; 130, bending adjustment member; 140, mounting member; 141, first mounting member; 142, second mounting member; 150, support tube; 200, implant; 300, target blood vessel. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0034] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0038] See Figures 1 to 4 , this application provides a conveying device 100. Figure 1 It is a schematic diagram of the proximal end of the conveying device 100 in an embodiment of this application for loading the implant 200. Figure 2 For Figure 1 It is a schematic diagram of removing the outer tube 120 from the proximal end of the conveying device 100 shown. Figure 3 For Figure 1 It is a schematic diagram of the proximal end of the conveying device 100 shown moving to the target blood vessel 300 and matching the curved shape of the target blood vessel 300. Figure 4 For Figure 1Schematic diagram of the implant 200 conforming to the target blood vessel 300 after the delivery device 100 releases the implant 200. The delivery device 100 is applied to a delivery system for delivering the implant 200 of the delivery system to the target blood vessel 300 and releasing it. After the delivery device 100 delivers the implant 200 to the target blood vessel 300, it can adjust the shape of the implant 200 it loads, so that the implant 200 before release conforms to the shape of the target blood vessel 300, and then the implant 200 after release can easily conform to the inner wall of the target blood vessel 300, increasing the wall adhesion between the implant 200 and the target blood vessel 300, thereby achieving the purpose of treating the target blood vessel 300 and optimizing the treatment effect.

[0039] Here, the target blood vessel 300 refers to the diseased blood vessel where the implant 200 needs to be placed. The target blood vessel 300 may have a distorted shape, a large-angle bend, etc. The target blood vessel 300 is a diseased blood vessel of the aorta. Of course, in other embodiments of the present application, the target blood vessel 300 may also be other types of diseased blood vessels, which will not be elaborated one by one here. Exemplarily, the implant 200 is a covered stent. Of course, the implant 200 may also be other types of implant components such as valve stents and other components that need to be implanted. This embodiment only takes the implantation of the implant 200 into the target blood vessel 300 as an example for illustration.

[0040] It can be understood that due to the distorted shape of the diseased blood vessel, the formation of large bend angles, etc., it brings great challenges to maintaining good wall adhesion after the covered stent is released. In some technical solutions, the inner tube and other support components in the delivery system and the covered stent itself have a certain stiffness. In the bent state, these components will generate a straightening force that resists bending, resulting in poor flexibility of the delivery system, increasing the difficulty of the delivery system entering the target blood vessel 300 and the difficulty of the covered stent tightly adhering to the blood vessel wall after release.

[0041] Therefore, the present application provides a novel delivery device 100. After the proximal end of the delivery device 100 moves into the target blood vessel 300, it can conform to the bending shape of the target blood vessel 300. Furthermore, when releasing the implant 200, it can improve the wall adhesion between the implant 200 and the inner wall of the target blood vessel 300, reduce the implantation difficulty of the implant 200, facilitate the tight adhesion between the implant 200 and the inner wall of the target blood vessel 300, and ensure the treatment effect. The specific structure of the delivery device 100 in an embodiment is introduced below.

[0042] See Figures 1 to 4, in one embodiment, the delivery device 100 includes an inner tube 110, an outer tube 120, and a bending member 130. The outer tube 120 is sleeved outside the inner tube 110 and can move axially relative to the inner tube 110 along the axial direction of the inner tube 110. The outer wall of the inner tube 110 and the inner wall of the outer tube 120 define an accommodation space capable of accommodating the implant 200. The bending member 130 is disposed between the inner tube 110 and the outer tube 120, at least partially located in the accommodation space, and is connected to the inner tube 110 and can drive the proximal end of the inner tube 110 and the implant 200 to bend.

[0043] The inner tube 110 has a proximal end and a distal end which are oppositely arranged. As Figure 1 shown, the left side is the proximal end and the right side is the distal end. The proximal end refers to the end of the inner tube 110 close to the heart, and the distal end refers to the end of the inner tube 110 far from the heart. The inner tube 110 extends from the distal end to the proximal end to form a long strip-shaped tube. The directions of the distal end and the proximal end are also the axial direction of the inner tube 110. It should be noted that the proximal end and the distal end of the inner tube 110 are also applicable to the delivery device 100 and other components, which will not be elaborated hereinafter.

[0044] The outer tube 120 is movably sleeved outside the inner tube 110. An accommodation space is defined between the inner wall of the outer tube 120 and the outer wall of the inner tube 110. The implant 200 is loaded in the accommodation space. The implant 200 has an expanded configuration and a contracted configuration and can switch between the expanded configuration and the contracted configuration. When the implant 200 is in the contracted configuration, the implant 200 has a smaller volume. At this time, the implant 200 is loaded in the accommodation space and is delivered to the target blood vessel 300 by the delivery device 100. When the implant 200 is in the expanded configuration, the volume of the implant 200 increases compared with the contracted configuration. At this time, the implant 200 can support on the inner wall of the target blood vessel 300 to achieve the purpose of treatment.

[0045] The implant 200 is loaded in the accommodation space between the inner tube 110 and the outer tube 120 in a compressed configuration. At this time, the inner wall of the outer tube 120 can contact the implant 200 to restrict the expansion of the implant 200. In this way, the volume of the implant 200 can be reduced, facilitating the delivery of the implant 200. Of course, the implant 200 can also be constrained by a binding coil or other restricting components to keep the implant 200 in a compressed configuration. The outer tube 120 can move axially relative to the inner tube 110 to release the implant 200 into the target blood vessel 300. When the delivery device 100 delivers the implant 200 to the target blood vessel 300, the outer tube 120 moves distally to release the implant 200. At this time, the implant 200 switches from a contracted configuration to an expanded configuration and gradually expands, enabling the implant 200 to conform to the inner wall of the target blood vessel 300. It should be noted that after the implant 200 is loaded in the accommodation space, the implant 200 is located at the proximal end of the delivery device 100. After the proximal end of the delivery device 100 moves to the target blood vessel 300, the outer tube 120 releases the implant 200 into the target blood vessel 300 at the proximal end.

[0046] Generally, the target blood vessel 300 is twisted and has a large bending angle. When directly using the delivery device 100 to deliver the implant 200, there is a situation where the implant 200 does not fit well against the inner wall of the target blood vessel 300. For this reason, the present application adds a bending adjustment member 130 to the delivery device 100. Through the bending adjustment member 130, the bending of the delivery device 100 can be controlled, so that the bending shape of the proximal end of the delivery device 100 coincides with / is consistent with / matches the bending shape of the target blood vessel 300, that is, the bending angle of the proximal end of the delivery device 100 is approximately the same as the bending angle of the target blood vessel 300, as Figure 3 shown. After the implant 200 is released in this way, the implant 200 can tightly conform to the inner wall of the target blood vessel 300, ensuring the treatment effect, as Figure 4 shown.

[0047] Specifically, the bending adjustment member 130 is connected to the inner tube 110, and the distal end of the bending adjustment member 130 extends in the distal direction and is specifically connected to a control handle (mentioned later). In this way, when the proximal end of the delivery device 100 enters the blood vessel, the bending adjustment member 130 can adjust the bending shape of the proximal end of the delivery device 100 to facilitate entry into the blood vessel. At the same time, after entering the target blood vessel 300, when the outer tube 120 is retracted, the bending adjustment member 130 can drive the implant 200 through the inner tube 110 to maintain the current bending shape to ensure that the bending shape of the implant 200 coincides, so that the implant 200 can conform to the inner wall of the target blood vessel 300 after being released.

[0048] When it is necessary to control the proximal end of the delivery device 100 to bend, the bending adjustment member 130 is pulled. The bending adjustment member 130 can drive the proximal end of the inner tube 110 to bend. The proximal end of the inner tube 110 can drive the implant 200 loaded on its outer side and the outer tube 120 to bend, so as to increase the flexibility of the delivery device 100 and facilitate the proximal end of the inner tube 110 to drive the implant 200 and the proximal end of the outer tube 120 to bend. When the bending adjustment member 130 drives the proximal end of the inner tube 110 to bend, the proximal end of the inner tube 110 can conform to the bending shape of the target blood vessel 300, that is, the bending shape of the inner tube 110 coincides with the bending shape of the target blood vessel 300, so that the bending shape of the proximal end of the delivery device 100 coincides with the bending shape of the target blood vessel 300, and then the outer tube 120 can conform to the bending shape of the target blood vessel 300. When the outer tube 120 moves distally to release the implant 200, the implant 200 gradually expands to fit the inner wall of the target blood vessel 300.

[0049] When using the delivery device 100 of the present application to deliver the implant 200, first compress the implant 200 so that the implant 200 is loaded between the inner tube 110 and the outer tube 120 in a contracted configuration. Push the proximal end of the delivery device 100 into the target blood vessel 300. During the process of the delivery device 100 entering the target blood vessel 300, operate the bending adjustment member 130 to drive the proximal end of the inner tube 110 to bend, so that the bending shape of the inner tube 110 coincides with the bending shape of the target blood vessel 300. Subsequently, control the outer tube 120 to move distally to release the implant 200. The implant 200 gradually switches to an expanded configuration to abut against the inner wall of the target blood vessel 300. At this time, the implant 200 has good wall attachment to the target blood vessel 300, ensuring the treatment effect.

[0050] For the delivery device 100 in the above embodiment, the bending adjustment member 130 is used to connect the proximal end of the inner tube 110. The proximal end of the inner tube 110 is controlled by the bending adjustment member 130 to drive the implant 200 and the proximal end of the outer tube 120 to bend. The bending adjustment member 130 drives the proximal end of the inner tube 110 to bend, and then the proximal end of the inner tube 110 can drive the implant 200 and the proximal end of the outer tube 120 to bend synchronously, so as to increase the flexibility of the inner tube 110, the implant 200 and the outer tube 120, thereby increasing the flexibility of the proximal end of the delivery device 100. In this way, the proximal end of the delivery device 100 can smoothly enter the target blood vessel 300 and coincide with the bending shape of the target blood vessel 300. After the outer tube 120 releases the implant 200, it can ensure that the implant 200 is tightly attached to the inner wall of the target blood vessel 300, reducing the implantation difficulty of the implant 200 and ensuring the accuracy of the implantation of the implant 200, thereby ensuring the treatment effect.

[0051] Optionally, the inner tube 110 has a through conveying channel. The conveying channel is arranged through from the distal end to the proximal end and is located in the inner tube 110. The conveying channel is used for guiding wires or other instruments to pass through to meet the surgical requirements. Optionally, the inner tube 110 and the outer tube 120 have a braided layer to increase the bending performance of the inner tube 110 and the outer tube 120, facilitating the bending of the inner tube 110 and the outer tube 120 under the action of the bending member 130. Optionally, the inner tube 110 and the outer tube 120 are made of polyamide (nylon, Nylon), thermoplastic elastomer (TPE, Thermoplastic Elastomer) or other materials that can ensure the structural strength and bending performance of the inner tube 110 and the outer tube 120.

[0052] In one embodiment, the delivery device 100 further includes a control handle (not shown). The control handle is located at the distal end of the delivery device 100 and is respectively connected to the outer tube 120 and the bending member 130. The control handle can independently control the bending member 130 to drive the proximal end of the inner tube 110 to bend, and the control handle can also independently control the outer tube 120 to move distally.

[0053] The control handle can pull the bending member 130. Further, the bending member 130 can drive the proximal end of the inner tube 110 to bend. The bending of the proximal end of the inner tube 110 can drive the proximal ends of the implant 200 and the outer tube 120 to bend, so that the bending shape of the delivery device 100 coincides with the bending shape of the target blood vessel 300, as Figure 3 shown. After the delivery device 100 releases the implant 200, the control handle releases the bending member 130, and the proximal end of the inner tube 110 becomes straight, facilitating the withdrawal of the delivery device 100 from the blood vessel. When the control handle pulls the outer tube 120, the outer tube 120 can move distally to realize the release of the implant 200.

[0054] In one embodiment, the control handle includes a first control portion and a second control portion. The first control portion is connected to the distal end of the outer tube 120 and controls the outer tube 120 to move axially relative to the inner tube 110. The second control portion is connected to the distal end of the bending member 130 and controls the bending member 130 to drive the inner tube 110 and the implant 200 to bend.

[0055] The first control portion is directly or indirectly connected to the distal end of the outer tube 120, such as by means of a wire. When the first control portion moves the outer tube 120, the outer tube 120 can move distally to realize the release of the implant 200. The second control portion is directly or indirectly connected to the distal end of the bending member 130, such as the cooperation of a bending knob and a screw. The second control portion can pull the bending member 130, so that the bending member 130 can drive the proximal end of the inner tube 110 to bend, so that the bending shape of the proximal end of the delivery device 100 can coincide with the bending shape of the target blood vessel 300.

[0056] SeeFigure 1 and Figure 2 In one embodiment, the delivery device 100 further includes a support tube 150. The support tube 150 is located inside the outer tube 120, sleeved outside the inner tube 110, and is located at the distal end of the accommodation space. That is to say, the proximal end of the support tube 150 is connected to the inner tube 110 to support the inner tube 110 on the support tube 150. It can be understood that the support tube 150 has a certain structural strength and can stably support the bending of the inner tube 110 to meet the use performance. Optionally, the distal end of the support tube 150 is connected to the control handle.

[0057] Optionally, the inner tube 110 and the support tube 150 are coaxially arranged. In this way, the support effect on the inner tube 110 can be ensured, and the stable delivery of the implant 200 can be realized. Optionally, the inner diameter of the support tube 150 is greater than the outer diameter of the inner tube 110 to ensure that the inner tube 110 can pass through the support tube 150, thereby realizing the support effect of the support tube 150 on the inner tube 110. Optionally, the support tube 150 has a wire routing channel that penetrates from the proximal end to the distal end, and the distal end of the bending adjustment member 130 is connected to the control handle through the wire routing channel.

[0058] See Figure 1 and Figure 2 In one embodiment, the support tube 150 can move relative to the inner tube 110 in the axial direction of the inner tube 110 towards the distal end. That is to say, the support tube 150 is movably arranged outside the inner tube 110 and inside the outer tube 120. The support tube 150 can move in the axial direction towards the distal end to increase the size of the accommodation space, thereby increasing the length of the adjustable bending area at the proximal end of the inner tube 110, which is beneficial to adjusting the position of the implant in the accommodation space to a greater extent and facilitating the adjustment of the bending degree of the proximal end of the inner tube 110.

[0059] See Figure 1 and Figure 2 In one embodiment, the inner tube 110 has at least one connection position between the proximal end and the distal end, and the bending adjustment member 130 is connected to the inner tube 110 at the connection position. That is to say, in addition to connecting to the inner tube 110 near the proximal end of the inner tube 110, the bending adjustment member 130 is also connected to the inner tube 110 at other positions of the inner tube 110, so as to facilitate the bending adjustment member 130 to drive the inner tube 110 to present various bending forms. In this way, the bending adjustment member 130 can drive the proximal end of the inner tube 110 to bend from the connection position, so that the inner tube 110 can be bent according to the required bending form, so that the bending form of the inner tube 110 coincides with the bending form of the target blood vessel 300, that is, the bending form of the implant 200 is consistent with the bending form of the target blood vessel 300, thereby ensuring the wall attachment of the implant 200 to the inner wall of the target blood vessel 300.

[0060] See Figure 1 andFigure 2 In one embodiment, the conveying device 100 further includes a mounting member 140. The mounting member 140 is disposed on the outer wall of the inner tube 110 and is located in the outer tube 120. The bending member 130 is connected to the mounting member 140. The mounting member 140 is located between the inner tube 110 and the outer tube 120 and is fixedly disposed on the outer wall of the inner tube 110. The distal end of the bending member 130 can pass through the mounting member 140 to connect to the control handle. When controlling the proximal end of the conveying device 100 to bend, the bending member 130 is pulled. The bending member 130 drives the proximal end of the inner tube 110 to bend through the mounting member 140, so as to realize the bending control of the proximal end of the inner tube 110.

[0061] Moreover, the mounting member 140 is fixed to the outer wall of the inner tube 110, which can avoid relative movement between the mounting member 140 and the inner tube 110, and is convenient for the bending member 130 to control the bending of the inner tube 110. Optionally, the mounting member 140 is a mounting block, and the mounting block is fixed to the outer wall of the inner tube 110. Optionally, the mounting member 140 has an annular structure, and the inner cavity of the annulus is fixedly installed on the outer wall of the inner tube 110. Of course, in other embodiments of the present application, the mounting member 140 can also be cylindrical or other shapes, as long as it does not affect the loading and release of the implant 200.

[0062] See Figure 1 and Figure 2 In one embodiment, the number of the mounting members 140 is multiple. The multiple mounting members 140 are arranged at intervals along the axial direction of the inner tube 110, and each mounting member 140 is connected to the bending member 130. The distal end of the bending member 130 is connected to the second connecting portion of the control handle, and the proximal end of the bending member 130 passes through each mounting member 140. That is to say, a connection relationship between the inner tube 110 and the bending member 130 is established by using multiple mounting members 140, ensuring that the bending member 130 can reliably drive the inner tube 110 to bend, so that the bending shape of the inner tube 110 matches the bending shape of the target blood vessel 300, so as to ensure the wall attachment of the implant 200 to the inner wall of the target blood vessel 300 after the implant 200 is released. Thus, the implant 200 is tightly attached to the inner wall of the target blood vessel 300, reducing the implantation difficulty of the implant 200 and ensuring the accuracy of the implantation of the implant 200, thereby ensuring the treatment effect.

[0063] In one embodiment, the axial distance between any two adjacent mounting members 140 is a fixed value. That is to say, the distance between any two adjacent mounting members 140 in the axial direction is a fixed value. In this way, the relationship between the pulling force of the bending member 130 and the bending angle of the proximal end of the inner tube 110 can be quantified. The operator can predict the required bending angle of the proximal end of the inner tube 110 according to the bending degree of the target blood vessel 300, and control the pulling of the bending member 130 according to the bending angle, reducing the adjustment times of the bending shape of the proximal end of the inner tube 110 and improving the efficiency.

[0064] See Figure 1 andFigure 2 , in one embodiment, the mounting member 140 includes a first mounting member 141 and at least one second mounting member 142. The first mounting member 141 is disposed near the proximal end of the inner tube 110, and all the second mounting members 142 are located between the first mounting member 141 and the distal end of the inner tube 110. The proximal end of the bending member 130 is fixedly connected to the first mounting member 141 and is movably connected to all the second mounting members 142. In some implementations, the bending member 130 is movably connected to the second mounting members 142 along the axial direction.

[0065] That is to say, the first mounting member 141 is disposed near the proximal end of the inner tube 110, and at least one second mounting member 142 is located on the side of the first mounting member 141 away from the proximal end. When there is one second mounting member 142, one second mounting member 142 is disposed on the outer wall of the inner tube 110 and is located between the first mounting member 141 and the proximal end of the support tube 150. When there are multiple second mounting members 142, the multiple second mounting members 142 are spaced from the proximal end to the distal end on the outer wall of the inner tube 110.

[0066] The second mounting member 142 has a through mounting hole, and the bending member 130 is movably disposed in the mounting hole. When the second control part pulls the distal end of the bending member 130, the bending member 130 can pull the first mounting member 141 and move relative to the second mounting member 142 in the mounting hole, thereby driving the inner tube 110 to bend.

[0067] Exemplarily, as Figure 1 and Figure 2 shown, there is one second mounting member 142, the first mounting member 141 is close to the proximal end of the inner tube 110, and the second mounting member 142 is located in the middle region of the inner tube 110. The distal end of the bending member 130 is fixed to the control handle, the proximal end of the bending member 130 is fixed to the first mounting member 141, and is movably mounted in the mounting hole of the second mounting member 142. Thus, the bending member 130 drives the inner tube 110 to bend through the two mounting members 140. Of course, the inner tube 110 with different spacings and different numbers of mounting members 140 can also be replaced to meet different conveying requirements.

[0068] Refer to Figure 1 and Figure 2 , in one embodiment, the central axis of the bending member 130 is arranged parallel to the central axis of the inner tube 110 and is spaced from the central axis of the inner tube 110 in the radial direction of the inner tube 110. That is, the bending member 130 is arranged parallel to the inner tube 110, and there is a preset spacing between the central axis of the bending member 130 and the central axis of the inner tube 110 in the radial direction of the inner tube 110. It can be understood that the mutual parallelism in this application is not absolute parallelism, and the approximate parallelism (for example, the included angle is 0.1°) caused by processing errors and assembly errors is also within the scope of the mutual parallelism in this application, and will not be repeated hereinafter.

[0069] That is to say, the bending member 130 is located outside the inner tube 110, and there is a certain distance between the bending member 130 and the outer wall of the inner tube 110, so that the bending member 130 can drive the inner tube 110 to bend conveniently. Optionally, the bending member 130 is a traction wire, a steel wire rope, a nylon rope or other components that can play a pulling role.

[0070] See Figure 1 and Figure 2 Optionally, the number of the bending members 130 is one, and one bending member 130 is arranged outside the inner tube 110. Pull the bending member 130 to control the proximal end of the conveying device 100 to bend in the corresponding direction. When bending in other directions is required, after rotating the conveying device 100, adjust the circumferential position of the bending member 130, and pull the bending member 130 so that the proximal end of the conveying device 100 can be bent to meet the usage requirements. In this way, the conveying device 100 can be accurately conveyed into the target blood vessel 300, and its wall adhesion to the target blood vessel 300 can be increased.

[0071] In one embodiment, the number of the bending members 130 is multiple, and the multiple bending members 130 are arranged at intervals along the circumferential direction of the inner tube 110. The distal ends of the multiple bending members 130 are respectively connected to multiple second control parts, the proximal ends of the multiple bending members 130 are respectively fixed to the proximal end of the inner tube 110, and the multiple bending members 130 are distributed along the circumferential direction of the inner tube 110. When the proximal end of the conveying device 100 needs to bend in a certain direction, the corresponding second control part pulls the bending member 130 in this direction and releases the other bending members 130, so that the conveying device 100 can be accurately conveyed into the target blood vessel 300, and its wall adhesion to the target blood vessel 300 can be increased. In this way, without rotating the conveying device 100, directly pulling the bending member 130 in the corresponding direction and releasing the bending members 130 in the other directions can meet the bending control of the proximal end of the conveying device 100.

[0072] See Figure 1 and Figure 2 In one embodiment, the conveying device 100 further includes a visualization member, and the visualization member is arranged on the inner tube 110 and / or the outer tube 120. Exemplarily, the visualization member is arranged at the proximal end of the outer tube 120. Of course, in other embodiments of the present application, the visualization member can also be arranged at the proximal end of the inner tube 110 or at the proximal ends of the inner tube 110 and the outer tube 120. The visualization member has a visualization function. After cooperating with an imaging device such as an X-ray machine, the position of the conveying device 100 in the blood vessel can be displayed by X-ray irradiation, which is convenient for the operator to identify.

[0073] See Figure 1 and Figure 2, in one embodiment, the delivery device 100 further includes a limiting member (not shown), which is located between the outer wall of the inner tube 110 and the inner wall of the outer tube 120. The proximal end of the limiting member is used for detachably connecting with the implant 200. The limiting member is used to limit the shape of the implant 200 so that the implant 200 maintains a contracted configuration outside the inner tube 110, avoiding expansion due to accidental contact and movement of the outer tube 120. The proximal end of the limiting member is connected to the third control part of the control handle. After the outer tube 120 releases the implant, by operating the third control part, the third control part can control the limiting member to disengage from the implant 200, thereby releasing the restraint on the implant 200.

[0074] When the proximal end of the delivery device 100 is not in the target blood vessel 300, if the outer tube 120 accidentally moves distally, at this time, since the limiting member has not disengaged from the implant 200 and still plays a limiting role on the implant 200, at this time, the implant 200 is not released. After the proximal end of the delivery device 100 is in the target blood vessel 300, the first control part controls the outer tube 120 to move distally, and moreover, the third control part also controls the limiting member to disengage from the implant 200, realizing the release of the implant 200. Optionally, the limiting member is a restraint coil, a buckle driven by a connecting rope, or other structural forms. The limiting member can keep the implant 200 in a compressed configuration. After the limiting member disengages from the implant 200, the implant 200 switches from a contracted configuration to an expanded configuration.

[0075] In one embodiment, the implant 200 is located between the proximal ends of the inner tube 110 and the outer tube 120 and is limited by the inner wall of the proximal end of the outer tube 120. After the proximal end of the delivery device 100 is in the target blood vessel 300, control the outer tube 120 to move distally. At this time, the implant 200 is directly released into the target blood vessel 300 to abut against the inner wall of the target blood vessel 300.

[0076] In another embodiment, the implant 200 is located between the proximal ends of the inner tube 110 and the outer tube 120 and is limited by the limiting member. After the proximal end of the delivery device 100 is in the target blood vessel 300, control the outer tube 120 to move distally. At this time, due to the restraint of the limiting member on the implant 200, the implant 200 will not be released until the limiting member disengages from the implant 200, and then the implant 200 is released into the target blood vessel 300 to abut against the inner wall of the target blood vessel 300.

[0077] In some scenarios, after the outer tube 120 is retracted, the proximal end of the inner tube 110 and the implant 200 can be kept in a bent shape by operating the bending member 130, so that the bent shape of the proximal end of the inner tube 110 and the implant 200 continues to match the inner wall of the target blood vessel 300. Subsequently, control the limiting member to disengage from the implant 200, and the implant 200 is released into the target blood vessel 300.

[0078] The above-mentioned conveying device 100 and conveying system can, by arranging the bending adjustment part 130 on the inner tube 110, realize the bending adjustment of the proximal end of the inner tube 110 and the implant 200 in two stages of the retraction of the outer tube 120 and the release of the implant 200, further optimizing the release effect of the implant 200.

[0079] See Figures 1 to 4 , for the conveying device 100 of the present application, the proximal end of the inner tube 110 is connected by the bending adjustment part 130, and the proximal end of the inner tube 110 is controlled by the bending adjustment part 130 to drive the proximal ends of the implant 200 and the outer tube 120 to bend. When the target blood vessel 300 has a large bending angle, the bending adjustment part 130 drives the proximal end of the inner tube 110 to bend, and then the proximal end of the inner tube 110 can drive the implant 200 and the proximal end of the outer tube 120 to bend synchronously, so as to increase the flexibility of the inner tube 110, the implant 200 and the outer tube 120, thereby increasing the flexibility of the proximal end of the conveying device 100. In this way, the proximal end of the conveying device 100 can smoothly enter the target blood vessel 300 and match the bending shape of the target blood vessel 300. After the outer tube 120 releases the implant 200, it can ensure that the implant 200 fits tightly against the inner wall of the target blood vessel 300, reducing the implantation difficulty of the implant 200 and ensuring the accuracy of the implantation of the implant 200, thereby ensuring the treatment effect.

[0080] See Figure 1 , the present application also provides a conveying system, including the implant 200 and the conveying device 100 in any of the above embodiments. The implant 200 is loaded in the accommodation space of the conveying device 100 in a contracted configuration, and the implant 200 is detachably connected to the inner tube 110. The implant 200 has an expanded configuration and a contracted configuration. The implant 200 is loaded in the conveying device 100 in a contracted configuration. After the conveying device 100 releases the implant 200 in the target blood vessel 300, the implant 200 switches from the contracted configuration to the expanded configuration. After the conveying system of the present application uses the conveying device 100 of the above embodiment to convey the implant 200, it can ensure the wall attachment of the implant 200 to the target blood vessel 300, thereby ensuring the accuracy of the implantation of the implant 200 and ensuring the treatment effect.

[0081] Optionally, the control handle includes an adjustment part, the adjustment part has a plurality of adjustment gears, and the distal end of the bending adjustment part 130 is connected to the adjustment part. The adjustment part is used to adjust the distance that the bending adjustment part 130 moves proximally, so as to adjust the magnitude of the pulling force received by the bending adjustment part 130, thereby adjusting the bending angle of the proximal end of the inner tube 110. When operating the adjustment part, the adjustment part can pull the bending adjustment part 130, and then the bending adjustment part 130 can drive the proximal end of the inner tube 110 to bend. When the adjustment part is in different adjustment gears, the inner tube 110 has different bending angles to facilitate matching with target blood vessels 300 of different shapes. Optionally, the adjustment part is an adjustment knob, etc.

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

[0083] The above-described embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A conveying device, characterized in that, The delivery device includes: An inner tube; An outer tube sleeved outside the inner tube and capable of moving axially relative to the inner tube, and a receiving space capable of accommodating an implant is defined between the outer wall of the inner tube and the inner wall of the outer tube; and A bending adjustment member disposed between the inner tube and the outer tube and at least partially located in the receiving space, the bending adjustment member is connected to the inner tube and can drive the proximal end of the inner tube and the implant to bend.

2. The conveying device according to claim 1, wherein, The central axis of the bending adjustment member is parallel to the central axis of the inner tube; And / or, the central axis of the bending adjustment member and the central axis of the inner tube are spaced apart in the radial direction of the inner tube; And / or, the outer wall of the proximal end of the inner tube and the inner wall of the proximal end of the outer tube define the receiving space, and the bending adjustment member can drive the proximal end of the inner tube and the implant to bend.

3. The conveying device according to claim 1, wherein The delivery device further includes a mounting member disposed on the outer wall of the inner tube, and the bending adjustment member is connected to the mounting member.

4. The conveying device according to claim 3, characterized in that, The number of the mounting members is multiple: The multiple mounting members are spaced apart along the axial direction of the inner tube, and each mounting member is connected to the bending adjustment member; The axial distance between any two adjacent mounting members is a fixed value.

5. The conveying device according to claim 4, wherein The mounting member includes a first mounting member and at least one second mounting member. The first mounting member is disposed near the proximal end of the inner tube, and all the second mounting members are located between the first mounting member and the distal end of the inner tube. The proximal end of the bending adjustment member is fixedly connected to the first mounting member and movably connected to all the second mounting members.

6. The conveying device according to any one of claims 1 to 5, characterized in that The number of the bending adjustment members is multiple, and the multiple bending adjustment members are spaced apart circumferentially along the inner tube; and / or, The delivery device further includes a limiting member located between the outer wall of the inner tube and the inner wall of the outer tube, and the proximal end of the limiting member is used for detachably connecting to the implant.

7. The conveying device according to any one of claims 1 to 5, characterized in that, The delivery device further includes a support tube located inside the outer tube, sleeved outside the inner tube, and the support tube is located at the distal end of the receiving space.

8. The conveying device according to claim 7, characterized in that The support tube can move distally along the axial direction of the inner tube relative to the inner tube; and / or, The support tube has a wire routing channel that penetrates axially along the support tube, and part of the bending adjustment member is located in the wire routing channel.

9. The conveying device according to any one of claims 1 to 5, characterized in that The delivery device further includes a control handle, and the control handle includes a first control part and a second control part: the first control part is connected to the distal end of the outer tube and controls the outer tube to move axially relative to the inner tube; the second control part is connected to the distal end of the bending adjustment member and controls the bending adjustment member to drive the inner tube and the implant to bend.

10. A conveying system, characterized in that, An implant and the delivery device according to any one of claims 1 to 9, wherein the implant is loaded in the receiving space of the delivery device in a contracted configuration, and the implant is detachably connected to the inner tube.

Images