Delivery device and medical system

Abstract

The application provides a delivery device and a medical system. The delivery device comprises a handle part and a support part. The support part comprises a first support section, a second support section and a third support section. The first support section is connected to the distal end of the handle part. The first support section and the second support section are arranged in the direction from the proximal end to the distal end. The outer diameter of the first support section is larger than that of the second support section. The third support section is connected to the second support section and extends in the radial direction of the second support section. The medical system comprises the delivery device and a medical implant. The medical implant comprises an artificial blood vessel and a stent. The artificial blood vessel is used to be sleeved on the first support section. The stent comprises a main stent and a branch stent. The main stent is used to be radially contracted and sleeved on the second support section. The branch stent is used to be radially contracted and sleeved on the second support section. In the process of loading and delivering the medical implant, the first support section is used to support the artificial blood vessel, so that the collapse of the artificial blood vessel is avoided and the use performance of the medical implant is affected.

Description

[0001] This application is a divisional application of application number 202210651772.6, filed on June 9, 2022, entitled "Transportation Device and Medical System". Technical Field

[0002] This invention relates to the field of medical device technology, specifically to a delivery device and medical system. Background Technology

[0003] In the treatment of thoracic aortic dissection, for Stanford type A dissection originating in the ascending aorta, since there are currently no endovascular repair products, the primary treatment is open-chest surgery for aortic replacement. Traditional open-chest surgery typically requires two procedures to treat the entire thoracic aortic dissection, making it difficult to complete the treatment in a single operation. In recent years, the use of intraoperative stents (i.e., the Sun's procedure) has enabled the previously two-operation open-chest process to be completed in a single surgery, shortening the operation time and reducing surgical trauma to the patient.

[0004] The medical implants used in the treatment of Stanford type A aortic dissection include pre-connected artificial blood vessels and intraoperative stents, allowing the artificial blood vessel and delivery stent to be delivered to the aorta via the same delivery device. In existing technologies, during the loading and storage of the medical implants into the delivery device, the artificial blood vessel is prone to collapse due to a lack of radial support, resulting in irregular shapes. Once the artificial blood vessel collapses, it is difficult to recover, especially when it is implanted into the body to replace autologous blood vessels; the collapse is essentially irreversible, affecting blood flow within the artificial blood vessel and adversely impacting the treatment outcome. Furthermore, the various components of the delivery devices in existing technologies are mostly glued together. The strength of the connection between these components after bonding depends heavily on the technician's skill, control of the amount of glue used, and the quality of the glue. Inexperienced technicians, improper glue usage, and glue cracking can all lead to connection failures between the components during use of the delivery device. Summary of the Invention

[0005] The purpose of this invention is to provide a delivery device and medical system for supporting artificial blood vessels in medical implants, preventing the artificial blood vessels from collapsing and affecting the treatment effect.

[0006] To achieve the above objectives, the present invention provides a conveying device, comprising:

[0007] Handle section; and,

[0008] The support portion includes a first support segment, a second support segment, and a third support segment. The first support segment is connected to the distal end of the handle portion. The first support segment and the second support segment are arranged and connected to each other along the direction from the proximal end to the distal end of the support portion. The outer diameter of the first support segment is larger than the outer diameter of the second support segment. The third support segment is connected to the second support segment and extends radially along the second support segment at the connection position between the second support segment and the third support segment.

[0009] Optionally, the support portion includes a first support rod, an outer support structure, a second support rod, and a third support rod; the first support rod includes a first segment and a second segment arranged at an angle, the proximal end of the first segment being connected to the distal end of the handle portion, and the proximal end of the second segment being connected to the distal end of the first segment; the outer support structure is connected to the first segment and covers a portion of the outer peripheral surface of the first segment, the outer support structure and the first segment together constituting the support segment; the second support rod is connected to the distal end of the second segment and extends axially along the second segment, the second support rod and the second segment together constituting the second support segment; the third support rod is connected to the second segment and extends radially along the second support segment at the connection position between the second support segment and the third support segment, the portion of the third support rod outside the second segment constituting the third support segment.

[0010] Optionally, the external support structure includes at least two support plates, each of which has an arc-shaped cross-section. The at least two support plates are arranged at circumferential intervals along the first segment and are mechanically connected to the first segment respectively.

[0011] Optionally, the first segment is provided with at least two first connecting hole groups arranged circumferentially, each first connecting hole group including multiple first connecting holes, and the multiple first connecting holes in the same first connecting hole group are spaced apart along the axial direction of the first segment; the inner surface of the support plate is provided with multiple first connecting posts arranged spaced apart along the length direction of the support plate, and the multiple first connecting posts on the same support plate are respectively inserted into the multiple first connecting holes of the same first connecting hole group.

[0012] Optionally, the first segment is further provided with a first threading hole, the axis of the first threading hole is inclined relative to the axis of the first segment, and the opening of the first threading hole is located in the gap between two adjacent support pieces.

[0013] Optionally, the conveying device further includes a first guide member, the proximal end of the second support rod being mechanically connected to the second segment, and the distal end of the second support rod being mechanically connected to the first guide member;

[0014] And / or, the conveying device further includes a second guide member disposed at the distal end of the third support rod, the third support rod being mechanically connected to the second segment.

[0015] Optionally, a second connecting hole extending axially along the second segment is provided on the distal end face of the second segment, and a first pin hole extending radially along the second segment and communicating with the second connecting hole is also provided on the distal outer peripheral surface of the second segment; a third connecting hole extending axially along the first guide is provided on the proximal end face of the first guide, and a second pin hole extending radially along the first guide and communicating with the third connecting hole is also provided on the proximal side of the first guide; the second support rod includes an inner core and an outer wrapping layer, the proximal and distal ends of the inner core are exposed outside the outer wrapping layer, and the proximal end of the inner core has a third pin hole, and the distal end of the inner core has a fourth pin hole; the proximal end of the inner core is inserted into the second connecting hole, and the distal end of the inner core is inserted into the third connecting hole; the conveying device further includes a first pin and a second pin; the first pin is inserted into the first pin hole and the third pin hole, and the second pin is inserted into the second pin hole and the fourth pin hole;

[0016] And / or, the second segment is provided with a fourth connecting hole extending radially along the second segment, the fourth connecting hole including a first sub-hole segment and a second sub-hole segment that are interconnected, the inner diameter of the first sub-hole segment being larger than the inner diameter of the second sub-hole segment, so that the connection between the first sub-hole segment and the second sub-hole segment forms a first stepped surface; the proximal end of the third support rod is inserted into the fourth connecting hole and is used to abut against the first stepped surface.

[0017] Optionally, the delivery device is used to load a medical implant, the medical implant including a stent;

[0018] The handle includes a housing and a wired control assembly, which is detachably connected to the housing and is used to control the bracket to retract radially and connect to the support, or to control the bracket to expand radially and detach from the support; the distal end of the housing is mechanically connected to the proximal end of the support, and the support and the housing remain relatively stationary.

[0019] Optionally, the housing includes an inner shell, an outer shell, and a fixing sleeve; the inner shell is partially disposed inside the outer shell, and there is a gap between the distal outer peripheral surface of the inner shell and the distal inner peripheral surface of the outer shell; the fixing sleeve is partially disposed within the gap, and the fixing sleeve also covers the distal end face of the inner shell.

[0020] The inner shell is mechanically connected to the outer shell, the fixing sleeve, and the first support rod, and the inner shell is also mechanically connected to the fixing sleeve.

[0021] Optionally, the inner shell has a plurality of first snap-fit ​​members arranged circumferentially at intervals on its distal inner circumferential surface, and the first support rod has a plurality of second snap-fit ​​members arranged circumferentially at intervals on its proximal outer circumferential surface. One of the first snap-fit ​​members and the second snap-fit ​​member is a groove, and the other is a protrusion for snapping into the groove.

[0022] And / or, the outer circumferential surface of the inner shell is provided with a third snap-fit ​​member extending axially, the proximal outer circumferential surface of the inner shell is also provided with a first abutment portion extending circumferentially, and the distal outer circumferential surface of the inner shell is provided with a fourth snap-fit ​​member extending circumferentially; the outer shell includes a shell body and an annular first retaining ring, the inner circumferential surface of the shell body is provided with a fifth snap-fit ​​member extending axially, the first retaining ring is disposed at the proximal end of the shell body, and the inner circumferential surface of the first retaining ring is provided with a second abutment portion extending circumferentially; the fixing sleeve includes a cylindrical retaining ring and a second retaining ring disposed at the distal end of the cylindrical retaining ring, the inner circumferential surface of the cylindrical retaining ring is provided with a sixth snap-fit ​​member extending circumferentially;

[0023] Both the first abutting portion and the second abutting portion are protrusions, and the distal end face of the first abutting portion abuts against the proximal end face of the second abutting portion; one of the three locking members and the fifth locking member is a groove, and the other is a protrusion that fits into the groove; one of the fourth locking member and the sixth locking member is a groove, and the other is a protrusion that fits into the groove.

[0024] And / or, the third snap-fit ​​element is a groove; the outer circumferential surface of the inner shell is provided with at least one set of axially extending protrusions, the protrusions including two protrusions spaced apart circumferentially along the inner shell, and the space between the two protrusions forms the third snap-fit ​​element.

[0025] Optionally, the support includes a main support and a branch support, wherein the branch support is connected to the side of the main support;

[0026] The proximal end of the inner shell protrudes beyond the proximal end of the outer shell; the wired control assembly includes a first wired control mechanism and a second wired control mechanism. The first wired control mechanism is detachably connected to the inner shell and is used to control the distal portion of the main support and the branch support to retract radially and connect with the support portion, or to control the distal portion of the main support and the branch support to expand radially and detach from the support portion; the second wired control mechanism is disposed outside the first wired control mechanism and covers a portion of the proximal outer peripheral surface of the inner shell, and is detachably connected to the inner shell. The second wired control mechanism is used to control the proximal portion and the main body portion of the main support to retract radially and connect with the support portion, or to control the proximal portion and the main body portion of the main support to expand radially and detach from the support portion.

[0027] Optionally, the first wire control mechanism includes a cylindrical joint, and a seventh and an eighth locking member are provided on the outer peripheral surface of the joint; the seventh locking member is a slot and includes a first and a second slot segment that are interconnected, the first slot segment extends axially along the joint and the distal end of the first slot segment is an open end, and the second slot segment extends circumferentially along the joint; a ninth and a tenth locking member are provided on the proximal inner peripheral surface of the inner shell, the ninth locking member is a protrusion and is used to insert into the second slot segment, and one of the eighth and tenth locking members is a groove and the other is a protrusion that engages with the groove.

[0028] Optionally, the second wire control mechanism includes a bottom wall, an inner baffle wall, and an outer baffle wall. The inner baffle wall is disposed inside the outer baffle wall and is also detachably connected to the inner shell. The outer peripheral surface of the outer baffle wall is flush with the outer peripheral surface of the outer shell. The bottom wall is connected to the proximal ends of the outer baffle wall and the inner baffle wall.

[0029] Optionally, the inner shell has an eleventh and a twelfth snap-fit ​​member on its proximal outer circumferential surface, and the inner baffle has a thirteenth and a fourteenth snap-fit ​​member on its inner circumferential surface. The eleventh snap-fit ​​member is a groove and includes a third and a fourth groove segment that communicate with each other. The third groove segment extends axially along the inner shell and has an open end at its proximal end. The fourth groove segment extends circumferentially along the inner shell. The thirteenth snap-fit ​​member is a protrusion and is used to insert into the fourth groove segment. One of the twelfth and fourteenth snap-fit ​​members is a groove, and the other is a protrusion that snaps into the groove.

[0030] Optionally, the first wire control mechanism is further provided with a second threading hole, the second threading hole including a third sub-hole segment and a fourth sub-hole segment, the third sub-hole segment being located near the end of the fourth sub-hole segment, and the diameter of the third sub-hole segment being larger than the diameter of the fourth sub-hole segment; the second wire control mechanism is further provided with a third threading hole, the third threading hole including a fifth sub-hole segment and a sixth sub-hole segment, the fifth sub-hole segment being connected to the near end of the sixth sub-hole segment, and the inner diameter of the fifth sub-hole segment being larger than the inner diameter of the sixth sub-hole segment;

[0031] And / or, the inner circumferential surface of the inner shell is provided with a plurality of reinforcing ribs arranged at intervals along the axial direction, and the reinforcing ribs are provided with a plurality of fourth through holes.

[0032] Furthermore, to achieve the above objectives, the present invention also provides a medical system comprising:

[0033] The conveying device as described in the preceding item; and,

[0034] A medical implant for detachably mounting on the delivery device, comprising an artificial blood vessel and a stent, the stent comprising a main stent and a branch stent, the proximal end of the main stent being connected to the distal end of the artificial blood vessel, and the proximal end of the branch stent being connected to the side of the main stent; wherein,

[0035] The artificial blood vessel is used to be fitted onto the outer peripheral surface of the first support segment and is stretched open by the first support segment; the main stent is radially contracted and fitted onto the outer peripheral surface of the second support segment, and the branch stent is radially contracted and fitted onto the outer peripheral surface of the third support segment.

[0036] Compared with the prior art, the delivery device and medical system of the present invention have the following advantages:

[0037] The aforementioned delivery device includes a handle and a support. The support includes a first support segment, a second support segment, and a third support segment. The first support segment is connected to the distal end of the handle. The first and second support segments are arranged and connected to each other along the proximal to distal direction of the support, and the outer diameter of the first support segment is larger than the outer diameter of the second support segment. The third support segment is connected to the second support segment and extends radially outward along the second support segment at the connection point between the third and second support segments. The delivery device is used to load and deliver a medical implant, which includes an artificial blood vessel and a stent. The stent includes a main stent and a branch stent. The proximal end of the main stent is connected to the distal end of the artificial blood vessel, and the proximal end of the branch stent is connected to the side of the main stent. When the delivery device loads the medical implant, the artificial blood vessel is fitted onto the outer peripheral surface of the first support segment and is expanded by the first support segment. The main stent contracts radially and is fitted onto the outer peripheral surface of the second support segment, and the branch stent contracts radially and is fitted onto the outer peripheral surface of the third support segment. In other words, when the medical implant used for Stanford type A dissection treatment is loaded using the delivery device, the first support section can be used to provide radial support for the artificial blood vessel, thereby preventing the artificial blood vessel from collapsing and affecting the treatment effect.

[0038] Furthermore, the various parts and components of the conveying device are connected by mechanical connections to reduce or even eliminate the use of adhesives. This avoids dependence on factors such as the skill level of the technician, the amount of adhesive used, and the quality of the adhesive, thereby preventing connection failures caused by these factors during use and improving surgical safety. Attached Figure Description

[0039] The accompanying drawings are provided to better understand the invention and are not intended to unduly limit the scope of the invention. Wherein:

[0040] Figure 1 This is a schematic diagram of the conveying device provided by the present invention according to an embodiment;

[0041] Figure 2 This is a structural diagram of a medical implant in the prior art;

[0042] Figure 3 This is an exploded view of a conveying device according to an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the structure of the second support rod according to an embodiment of the present invention;

[0044] Figure 5 This is a cross-sectional view of a conveying device provided according to an embodiment of the present invention;

[0045] Figure 6 yes Figure 5 Enlarged diagram of point A in the diagram;

[0046] Figure 7 yes Figure 5 Enlarged schematic diagram at point B in the diagram, omitting the proximal ends of the inner core of the second support rod and the third support rod;

[0047] Figure 8 yes Figure 5 Enlarged schematic diagram at point C in the diagram, omitting the far end of the inner core of the second support rod and the second pin;

[0048] Figure 9 This is a schematic diagram of the structure of the sub-shell of the inner shell of the conveying device provided according to an embodiment of the present invention;

[0049] Figure 10 This is a schematic diagram of the sub-shell structure of the inner shell of the conveying device according to an embodiment of the present invention. Figure 10 and Figure 9 The observation directions are different;

[0050] Figure 11 This is a schematic diagram of the housing of the conveying device provided according to an embodiment of the present invention;

[0051] Figure 12 This is a schematic diagram of the housing of the conveying device according to an embodiment of the present invention. Figure 12 and Figure 11 The observation directions are different;

[0052] Figure 13 This invention is based on Figure 12 AA sectional view of the housing of the provided conveying device;

[0053] Figure 14This is a schematic diagram of the structure of the first wire control mechanism of the conveying device provided according to an embodiment of the present invention;

[0054] Figure 15 This is a cross-sectional view of the first wire-controlled structure provided by the present invention according to an embodiment;

[0055] Figure 16 The present invention provides a schematic diagram of the structure of the second wire control mechanism according to an embodiment;

[0056] Figure 17 This is a cross-sectional view of the second wire control mechanism provided by the present invention according to an embodiment.

[0057] [The annotations in the attached figures are explained below]:

[0058] 1000 - Handle, 1100 - Housing, 1110 - Inner Housing, 1110a - Sub-Housing, 1110b - Through Hole, 1110c - Fifth Connecting Hole, 1110d - Second Connecting Post, 1111 - First Connecting Member, 1112 - Semi-circular Ring, 1112a - Fourth Wire Hole, 1113 - Third Connecting Member, 1113a - Protruding Rib, 1114 - First Abutment, 1115 - Fourth Connecting Member, 1116 - Eleventh Connecting Member, 1116a - Third Groove, 1116b - Fourth Groove, 1117 - Twelfth Connecting Member, 1118 - Ninth Connecting Member, 1119 - Tenth Connecting Member, 1120 - Outer Housing, 1120a - Housing Body, 1120b - First Retaining Ring, 1121 - Fifth Connecting Member, 1122 - Second The components are: 1130-Fixing sleeve, 1130a-Cylindrical retaining ring, 1130b-Second retaining ring, 1131-Sixth locking member, 1200-Wire control assembly, 1210-First wire control mechanism, 1210a-Joint, 1211-Seventh locking member, 1211a-First groove segment, 1211b-Second groove segment, 1212-Eighth locking member, 1213-Second wire hole, 1213a-Third sub-hole segment, 1213b-Fourth sub-hole segment, 1220-Second wire control mechanism, 1220a-Bottom wall, 1220b-Inner retaining wall, 1220c-Outer retaining wall, 1221-Thirteenth locking member, 1222-Fourteenth locking member, 1223-Third wire hole, 1223a-Fifth sub-hole segment, 1223b-Sixth sub-hole segment.

[0059] 2000-Support section, 2010-First support segment, 2011-First connecting hole, 2020-Second support segment, 2030-Third support segment, 2100-First support rod, 2110-First segment, 2111-First wire hole, 2112-Second snap-fit, 2120-Second segment, 2121-Second connecting hole, 2122-First pin hole, 2123-Fourth connecting hole, 2123a-First sub-hole segment, 2123b-Second sub-hole segment, 2200-Outer support structure, 2210-Support piece, 2211-First connecting post, 2300-Second support rod, 2310-Inner core, 2311-Third pin hole, 2312-Fourth pin hole, 2320-Outer wrapping layer, 2400-Third support rod, 2410-Rod body, 2420-Connecting part;

[0060] 3000 - First guide element, 3100 - Third connecting hole, 3200 - Second pin hole;

[0061] 4000 - Second guide component;

[0062] 5100 - First pin, 5200 - Second pin;

[0063] 10 - Artificial blood vessel, 20 - Stent, 21 - Main stent, 22 - Branch stent. Detailed Implementation

[0064] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the actual number, shape, and size of components in the actual implementation. In the actual implementation, the type, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex.

[0065] Furthermore, while each embodiment described below possesses one or more technical features, this does not imply that users of the present invention must simultaneously implement all technical features in any embodiment, or can only separately implement some or all technical features in different embodiments. In other words, provided it is feasible, those skilled in the art can, based on the disclosure of the present invention and depending on design specifications or implementation requirements, selectively implement some or all technical features in any embodiment, or selectively implement a combination of some or all technical features in multiple embodiments, thereby increasing the flexibility in implementing the present invention.

[0066] As used herein, the singular forms “a,” “an,” and “the” include plural objects, and the plural form “a plurality” includes two or more objects, unless otherwise expressly indicated. As used herein, the term “or” is generally used to include the meaning of “and / or,” unless otherwise expressly indicated, and the terms “install,” “connect,” and “link” should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Connections can be mechanical or electrical. Connections can be direct or indirect through an intermediate medium, and can represent internal communication between two elements or an interaction between two elements. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] Furthermore, in this article, the terms "proximal" and "distal" refer to the relative orientation, position, and direction of the components or movements relative to each other from the perspective of the physician using the medical device. Although "proximal" and "distal" are not restrictive, "proximal" usually refers to the end of the medical device that is closer to the physician during normal operation, while "distal" usually refers to the end that first enters the patient's body.

[0068] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clearly illustrate the objectives of the embodiments of the present invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0069] Figure 1 A schematic diagram of the conveying device provided in an embodiment of the present invention is shown. Figure 1As shown, the conveying device includes a handle portion 1000 and a support portion 2000. The support portion 2000 is disposed at the distal end of the handle portion 1000 and includes a first support section 2010, a second support section 2020, and a third support section 2030. The proximal end of the first support section 2010 is connected to the handle portion 1000. The first support section 2010 and the second support section 2020 are arranged and connected to each other along the direction from the proximal end to the distal end of the support portion 2000, and the outer diameter of the first support section 2010 is larger than the outer diameter of the second support section 2020. The third support section 2030 is connected to the second support section 2020 and extends radially along the second support section 2020 at the connection position S between the second support section 2020 and the third support section 2030. Here, the radial extension of the third support segment 2030 along the second support segment 2020 at the connection position between the second support segment 2020 and the third support segment 2030 includes both the case where the third support segment 2030 extends radially along the second support segment 2020 at the connection position S and the case where the third support segment 2030 extends radially approximately along the second support segment 2020 at the connection position S.

[0070] The delivery device is used to load and deliver a medical implant for the treatment of Stanford type A aortic dissection, the structure of which is as follows: Figure 2As shown, the device includes an artificial blood vessel 10 and a stent 20. The stent 20 includes a main stent 21 and a branch stent 22. The proximal end of the main stent 21 is connected to the distal end of the artificial blood vessel 10, and the proximal end of the branch stent 22 is connected to the side of the main stent 21, and the branch stent 22 communicates with the main stent 21. When the medical implant is loaded onto the delivery device, the artificial blood vessel 10 is fitted onto the outer peripheral surface of the first support segment 2010 and supported by the first support segment 2010. The main stent 21 contracts radially and is fitted onto the second support segment 2020, and the branch stent 22 contracts radially and is fitted onto the third support segment 2030. By using the first support segment 2010 to provide radial support for the artificial blood vessel 10, the collapse of the artificial blood vessel 10 on the delivery device can be avoided, thereby preventing adverse effects on the performance of the medical implant after implantation in the human body. Those skilled in the art will understand that the main support 21 can be divided into a proximal portion, a main body portion, and a distal portion arranged sequentially along its axial direction. The proximal and main body portions of the main support 21 contract radially under the constraint of a first binding wire and are detachably connected to the second support segment 2020. The distal portion of the main support 21 contracts radially under the constraint of a second binding wire and is detachably connected to the second support segment 2020. It should be noted that in some implementations, the first binding wire can also bind the distal portion of the main support 21. The branch support 22 contracts radially under the constraint of a third binding wire and is detachably connected to the third support segment 2030.

[0071] In this embodiment, to adapt to the shape of human blood vessels, the first support segment 2010 and the second support segment 2020 are preferably arranged at an angle to reduce the difficulty for the support portion 2000 of the delivery device to enter the blood vessel. The angle formed between the first support segment 2010 and the second support segment 2020 can be set according to the shape of human blood vessels.

[0072] Alternatively, please refer to Figure 3 The support part 2000 may include a first support rod 2100, an outer support structure 2200, a second support rod 2300, and a third support rod 2400.

[0073] The first support rod 2100 includes a first segment 2110 and a second segment 2120 arranged at an angle. The proximal end of the first segment 2110 is connected to the distal end of the handle portion 1000, and the proximal end of the second segment 2120 is connected to the distal end of the first segment 2110. The outer support structure 2200 is connected to the first segment 2110 and covers a portion of the outer peripheral surface of the first segment 2110. The first segment 2110 and the outer support structure 2200 together constitute the first support segment 2010, and the outer peripheral surface of the outer support structure 2200 is used to contact the artificial blood vessel 10. Preferably, the external support structure 2200 includes at least two support pieces 2210, each of which has an arc-shaped cross-section. The at least two support pieces 2210 are arranged circumferentially at intervals along the first segment 2110 so that there is a gap between adjacent support pieces 2210. Each support piece 2210 is connected to the first segment 2110.

[0074] The second support rod 2300 is connected to the distal end of the second segment 2120 and extends axially along the second segment 2120. The second support rod 2300 and the second segment 2120 together constitute the second support segment 2020, thereby arranging the second support segment 2020 at an angle to the first support segment 2010. The third support rod 2400 is connected to the second segment 2120 and extends radially along the second segment 2120 at the connection position S between the second segment 2120 and the third support rod 2400. The portion of the third support rod 2400 outside the second segment 2120 constitutes the third support segment 2030.

[0075] Furthermore, the delivery device also includes a first guide 3000 and a second guide 4000. The first guide 3000 is connected to the distal end of the second support rod 2300, and the second guide 4000 is disposed at the distal end of the third support rod 2400, that is, at the end of the third support rod 2400 away from the second segment 2120. At least a portion of the structure of the first guide 3000, for example, its distal end is divided into a cone-shaped body with a cross-section that gradually decreases from the proximal end to the distal end. At least a portion of the structure of the second guide 4000, for example, its distal end is divided into a cone-shaped body with a cross-section that gradually decreases from the proximal end to the distal end. The first guide 3000 and the second guide 4000 are used to guide the delivery device through the blood vessels of the human body. Preferably, the first guide 3000 and the second guide 4000 are made of soft materials, which avoids damage to the blood vessels during entry and withdrawal, and also avoids scratching the already deployed stent 20 during withdrawal.

[0076] Further, the handle portion 1000 includes a housing 1100 and a wired control assembly 1200. The wired control assembly 1200 is detachably connected to the housing 1100 and is used to control the bracket 20 to retract radially and connect to the support portion 2000, or to control the bracket 20 to expand radially and detach from the support portion 2000. That is, the wired control assembly 1200 is used to control the first binding wire, the second binding wire, and the third binding wire so that the main bracket 21 and the branch bracket 22 of the bracket 20 retract radially and connect to the corresponding support section, or so that the main bracket 21 and the branch bracket 22 of the bracket 20 expand radially and detach from the corresponding support section and are released.

[0077] Please continue to refer to this. Figure 3 The housing 1100 includes an inner shell 1110, an outer shell 1120, and a fixing sleeve 1130. The inner shell 1110 is partially disposed inside the outer shell 1120 and connected to the outer shell 1120, with a gap between the distal outer peripheral surface of the inner shell 1110 and the distal inner peripheral surface of the outer shell 1120. The fixing sleeve 1130 is partially disposed within the gap and also covers the distal end face of the inner shell 1110, and is connected to the inner shell 1110.

[0078] The wired control assembly 1200 includes a first wired control mechanism 1210 and a second wired control mechanism 1220. The first wired control mechanism 1210 and the second wired control mechanism 1220 are detachably connected to the inner shell 1110, and the second wired control mechanism 1220 is disposed outside the first wired control mechanism 1210, covering a portion of the proximal outer peripheral surface of the inner shell 1110. The second wired control mechanism 1220 controls the first binding wire to maintain or release it from the main support 21. The first wired control mechanism 1210 controls the second binding wire and the third binding wire to maintain or release them from the distal portion of the main support 21 and the branch support 22, respectively.

[0079] The second wire control mechanism 1220 is connected to a first control wire (not shown in the figure). The first control wire is used to connect with the first restraint wire, and the second wire control mechanism 1220 is used to selectively lock or unlock the first restraint wire through the first control wire. Specifically, when the second wire control mechanism 1220 is connected to the inner shell 1110, the second wire control mechanism 1220 locks the first restraint wire through the first control wire, so that the first restraint wire remains restrained to the main support 21, and at least keeps the proximal portion and the main body portion of the main support 21 in a radially contracted state and connected to the second support segment 2020. When the second wire control mechanism 1220 is separated from the inner shell 1110, the second wire control mechanism 1220 unlocks the first restraint wire through the first control wire, so that the first restraint wire is released from restraint to the main support 21, and at least allows the proximal portion and the distal portion of the main support 21 to expand radially and disengage from the second support segment 2020. It should be noted that, in this embodiment of the invention, the first binding wire can bind the main support 21 in any suitable manner, and those skilled in the art can choose any suitable connection method to achieve the connection between the first control wire and the first binding wire according to the actual situation.

[0080] The first wire control mechanism 1210 is connected to the second and third binding wires via a second control wire (not shown in the figure), and the first wire control mechanism 1210 is used to selectively lock or unlock the second and third binding wires via the second control wire. Specifically, when the first wire control mechanism 1210 is connected to the inner shell 1110, the first wire control mechanism 1210 locks the second and third binding wires via the second control wire, so that the distal portion of the main support 21 remains in a radially contracted state and connected to the second support section 2020 under the action of the second binding wire, while the branch support 22 remains in a radially contracted state and connected to the third support section 2030 under the action of the third binding wire. When the first wire control mechanism 1210 separates from the inner shell 1110, the first wire control mechanism 1210 releases the lock on the second binding wire and the third binding wire through the second control wire, and allows the distal portion of the main support 21 to expand radially and detach from the second support section 2020, and allows the branch support 22 to expand radially and detach from the third support section 2030.

[0081] The embodiments of the present invention do not particularly limit the manner in which the second restraint wire restrains the distal portion of the main support 21, nor the manner in which the third restraint wire restrains the branch support 22, nor the manner in which the second control wire is connected to the second and third restraint wires. For example, in one optional implementation, the first guide 3000 is provided with a first locking hole (not shown in the figure), the second guide 4000 is provided with a second locking hole (not shown in the figure), and the second control wire includes a first sub-control wire and a second sub-control wire, the first sub-control wire being connected to the second restraint wire, and the second sub-control wire being connected to the third restraint wire. When the first wire control mechanism 1210 is connected to the inner shell 1110, the end of the second binding wire away from the first sub-control wire passes through the hole on the distal portion of the main bracket 21 and is inserted into the first locking hole and locked. At the same time, the end of the third binding wire away from the second sub-control wire passes through the hole on the branch bracket 22 and is inserted into the second locking hole and locked. Thus, the distal portion of the main bracket 21 contracts radially and is connected to the second support section 2020, and the branch bracket 22 contracts radially and is connected to the third support section 2030. When the first wire control mechanism 1210 separates from the inner shell 1110, the first wire control mechanism 1210, through the first sub-control wire, moves the second binding wire away from the first locking hole and disengages it from the gap between the first locking hole and the distal portion of the main support 21, so that the second binding wire is no longer locked and the distal portion of the main support 21 is released. Additionally, the first wire control mechanism 1210, through the second sub-control wire, moves the third binding wire away from the gap between the second locking hole and the branch support 22, so that the third binding wire is no longer locked and the branch support 22 is released. Preferably, the first sub-control wire and the second binding wire are an integral structure, and the second sub-control wire and the third binding wire are an integral structure, that is, the first sub-control wire and the second binding wire are actually a single wire. It can be understood that, in an alternative implementation, the second control wire can also be a single wire, and this second control wire is simultaneously connected to both the second binding wire and the third binding wire.

[0082] In this embodiment of the invention, the various components of the support portion 2000, the support portion 2000 and the handle portion 1000, and the various components of the handle portion 1000 are mainly connected by mechanical connections. The term "mechanical connection" here refers to a connection solely through mechanical components. Possible methods include interference fits, interlocking of protrusions and grooves, pin-to-pin hole connections, key-to-keyway connections, threaded connections, and mutual abutment between two components, but do not include welding or bonding. By using mechanical connections between the various components of the conveying device, adhesive bonding is reduced or even completely eliminated. This eliminates the need for skilled technicians and precise control over adhesive usage, and also eliminates concerns about adhesive quality. This avoids poor bonding quality caused by these factors and connection failures due to issues such as glue separation during use.

[0083] Next, we will explain the connection method between the various components by describing the specific structure of each component of the conveying device.

[0084] Please refer to Figure 3 and Figure 5 The first segment 2110 and the second segment 2120 of the first support rod 2100 can be integrally formed. The first segment 2110 has at least two groups of first connecting holes arranged circumferentially. Each group of first connecting holes includes multiple first connecting holes 2011, and the multiple first connecting holes 2011 within the same group are spaced apart axially along the first segment 2110. Each support piece 2210 has multiple first connecting posts 2211 spaced apart along its length on its inner surface. The multiple first connecting posts 2211 on the same support piece 2210 are respectively used to insert into the multiple first connecting holes 2011 within the same group of first connecting holes, so that the support piece 2210 is connected to the first segment 2110. In this embodiment, there are two support pieces 2210 and two groups of first connecting holes.

[0085] Please continue to refer to point 3. Figure 5 and combined Figure 7The second segment 2120 has a second connecting hole 2121 extending axially along the second segment 2120 on its distal end face, and a first pin hole 2122 extending radially along the second segment 2120 and communicating with the second connecting hole 2121 on its distal outer peripheral surface. Furthermore, the second segment 2120 also has a fourth connecting hole 2123 extending radially along its outer peripheral surface. The fourth connecting hole 2123 includes a first sub-hole segment 2123a and a second sub-hole segment 2123b that communicate with each other. The inner diameter of the first sub-hole segment 2123a is larger than the inner diameter of the second sub-hole segment 2123b, such that the intersection of the first sub-hole segment 2123a and the second sub-hole segment 2123b forms a first stepped surface.

[0086] Please continue to refer to this. Figures 3 to 5 The second support rod 2300 includes an inner core 2310 and an outer wrapping layer 2320. The proximal and distal ends of the inner core 2310 are exposed outside the outer wrapping layer 2320. The proximal end of the inner core 2310 is provided with a third pin hole 2311, and the distal end of the inner core 2310 is provided with a fourth pin hole 2312.

[0087] like Figure 8 As shown, the first guide member 3000 has a third connecting hole 3100 extending axially along the first guide member 3000 on its proximal end face, and a second pin hole 3200 extending radially along the first guide member 3000 and communicating with the third connecting hole 3100 on its proximal side surface.

[0088] Furthermore, such as Figure 3 As shown, the conveying device further includes a first pin 5100 and a second pin 5200. When assembling the first support rod 2100, the second support rod 2300, and the first guide member 3000, it is only necessary to insert the proximal end of the inner core 2310 into the second connecting hole 2121, insert the first pin 5100 into the first pin hole 2122 and pass through the third pin hole 2311, insert the distal end of the inner core 2310 into the third connecting hole 3100, and then insert the second pin 5200 into the second pin hole 3200 and pass through the fourth pin hole 2312.

[0089] When assembling the first support rod 2100 and the third support rod 2400, the proximal end of the third support rod 2400 is inserted into the fourth connecting hole 2123, and the proximal end of the third support rod 2400 is located in the first sub-hole segment 2123a. In an optional implementation, the third support rod 2400 includes a rod body 2410 and a connecting portion 2420 disposed at the proximal end of the rod body 2410. The rod body 2410 is first inserted into the fourth connecting hole 2123. The connecting portion 2420 is, for example, a tube, which is sleeved on the proximal end of the rod body 2410 and interference-fitted with the proximal end of the rod body 2410 to form the proximal end of the third support rod 2400. Alternatively, after the connecting portion 2420 is sleeved onto the rod body 2410, the tube is clamped by a clamp to deform the tube and fix it to the rod body 2410. The connecting portion 2420 is inserted into the first sub-hole segment 2123a and abuts against the first stepped surface at the intersection of the first sub-hole segment 2123a and the second sub-hole segment 2123b. Additionally, the second guide member 4000 can be connected to the distal end of the third support rod 2400 in any suitable manner, for example, by injection molding. Optionally, the third support rod 2400 is made of nickel-titanium alloy.

[0090] In addition, please return to the reference. Figure 5 and Figure 6 The first segment 2110 of the first support rod 2100 is further provided with a first threading hole 2111. The axis of the first threading hole 2111 is inclined relative to the axis of the first segment 2110, and the opening of the first threading hole 2111 is located in the gap between two adjacent support pieces 2210, so that the outer support structure 2200 does not obstruct the opening of the first threading hole 2111. The first threading hole 2111 is used for the distal end of the first control wire to be inserted.

[0091] And, please return to the reference. Figure 3 The first segment 2110 has a plurality of second snap-fit ​​members 2112 arranged at circumferential intervals on its proximal outer peripheral surface. The second snap-fit ​​members 2112 are used for mechanical connection with the handle portion 1000.

[0092] Please continue to refer to this. Figure 3 and Figure 5 and combined Figure 9The inner shell 1110 has a plurality of first snap-fit ​​members 1111 arranged circumferentially at intervals on its distal inner circumferential surface. The first snap-fit ​​members 1111 are used to snap into second snap-fit ​​members 2112 on the first support rod 2110. Optionally, the first snap-fit ​​member 1111 is a groove, and the second snap-fit ​​member 2112 is a protrusion, with each second snap-fit ​​member 2112 inserted into one of the first snap-fit ​​members 1111. When the first snap-fit ​​member 1111 and the second snap-fit ​​member 2112 are snapped into each other, the inner shell 1110 and the first support rod 2110 remain relatively stationary. Preferably, there are two of each of the first snap-fit ​​members 1111 and the second snap-fit ​​members 2112.

[0093] Alternatively, from the perspective of ease of assembly, such as Figure 3 As shown, the inner shell 1110 is an assembled component, which may include two sub-shells 1110a, and each sub-shell 1110a is provided with a first snap-fit ​​member 1111. The first snap-fit ​​member 1111 has two opposite ends in the circumferential direction of the sub-shell 1110a, one end being an open end and the other end being a closed end. Each second snap-fit ​​member 2112 is inserted into the corresponding first snap-fit ​​member 1111 from the open end, and the open end of one first snap-fit ​​member 1111 is correspondingly arranged with the closed end of the other first snap-fit ​​member 1111, so that the two first snap-fit ​​members 1111 are isolated from each other and do not communicate. It should be understood that each of the sub-shells 1110a has a first surface and a second surface that are circumferentially opposite and extend axially. The first surface is provided with a fifth connecting hole 1110c, and the second surface is provided with a second connecting post 1110d. The second connecting post 1110d on one sub-shell 1110a is used to insert into the fifth connecting hole 1110c on the other sub-shell 1110a, so that the two sub-shells 1110a are fastened together to form the inner shell 1110.

[0094] Furthermore, such as Figure 3 and Figure 9As shown, the inner circumferential surface of the inner shell 1110 is also provided with a plurality of annular reinforcing ribs arranged at intervals along the axial direction, and each reinforcing rib is provided with a plurality of fourth threading holes 1112a. A portion of the fourth threading holes 1112a are used for the first control wire to pass through, and a portion of the fourth threading holes 1112a are used for the second control wire to pass through. Depending on the actual situation, a portion of the fourth threading holes 1112a may also be used for the first binding wire to pass through, a portion of the fourth threading holes 1112a for the second binding wire to pass through, and a portion of the fourth threading holes 1112a for the third binding wire to pass through. This can prevent the wires from tangling or bending. It can be understood that each reinforcing rib actually includes two interlocking semicircular rings 1112, each semicircular ring 1112 is disposed on one of the sub-shells 1110a, and each semicircular ring 1112 can be provided with the fourth threading holes 1112a.

[0095] Please continue to refer to this. Figure 3 and combined Figure 10 The inner shell 1110 has a third engaging member 1113 extending axially on its outer peripheral surface. The inner shell 1110 has a first abutting portion 1114 extending circumferentially on its proximal outer peripheral surface. The inner shell 1110 also has an eleventh engaging member 1116 and a twelfth engaging member 1117 on its proximal outer peripheral surface. The eleventh engaging member 1116 is a slot and includes a third groove segment 1116a and a fourth groove segment 1116b that communicate with each other. The third groove segment 1116a extends axially along the inner shell 1110, and its proximal end is an open end. The fourth groove segment 1116b extends circumferentially along the inner shell 1110. The inner shell 1110 has a fourth engaging member 1115 extending circumferentially on its distal outer peripheral surface. Furthermore, as... Figure 9 As shown, the inner shell 1110 also has a ninth snap-fit ​​member 1118 and a tenth snap-fit ​​member 1119 on its proximal inner circumferential surface. The ninth snap-fit ​​member 1118 is, for example, a protrusion. Furthermore, the inner shell 1110 also has a through hole 1110b communicating with the inner cavity of the inner shell 1110, the through hole 1110b being used for the first control wire to pass through.

[0096] Please continue to refer to this. Figure 3 and combined Figures 11 to 13The outer casing 1120 includes a casing body 1120a and an annular first retaining ring 1120b. The casing body 1120a may be a hollow cylindrical structure, and the first retaining ring 1120b is disposed at the proximal end of the casing body 1120a. A fifth engaging member 1121 extending axially is provided on the inner circumferential surface of the casing body 1120a, and a second abutting portion 1122 extending circumferentially is provided on the inner circumferential surface of the first retaining ring 1120b. The fixing sleeve 1130 includes a cylindrical retaining ring 1130a and a second retaining ring 1130b disposed at the distal end of the cylindrical retaining ring 1130a. A sixth engaging member 1131 extending circumferentially is provided on the inner circumferential surface of the annular retaining ring 1130a.

[0097] One of the third latching member 1113 and the fifth latching member 1121 is a groove, and the other is a protrusion for engaging the groove. For example, the third latching member 1113 is a groove, and the fifth latching member 1121 is a protrusion. Specifically, the outer peripheral surface of the inner shell 1110 is provided with at least one axially extending set of protruding ribs, the set of protruding ribs including two spaced-apart protruding ribs 1113a, the space between the two protruding ribs 1113a forming the third latching member 1113. The advantage of this is that the outer diameter of the inner shell 1110 can be reduced, thereby reducing the radial dimension of the outer shell 1120 and the radial dimension of the entire handle portion 1000. Moreover, this arrangement also allows for functional separation between the outer shell 1120 and the inner shell 1110. When the outer tube of the conveying device needs to be shaped, only the outer surface of the outer shell 1120 can be shaped without affecting the function of the inner shell 1110.

[0098] Furthermore, both the first abutting portion 1114 and the second abutting portion 1122 are protrusions, and the distal end face of the first abutting portion 1114 is used to abut against the proximal end face of the second abutting portion 1122. One of the fourth latching member 1115 and the sixth latching member 1131 is a groove, and the other is a protrusion that engages with the groove. Optionally, the fourth latching member 1115 is a protrusion, and the sixth latching member 1131 is a groove.

[0099] Please refer to Figure 3 and Figure 5 and combined Figure 14The first wire-controlled mechanism 1210 includes a cylindrical joint portion 1210a, and a seventh latching member 1211 and an eighth latching member 1212 are provided on the outer peripheral surface of the joint portion 1210a. Preferably, the seventh latching member 1211 is a slot and includes a first slot segment 1211a and a second slot segment 1211b that are interconnected. The first slot segment 1211a extends axially along the joint portion 1210a, and the distal end of the first slot segment 1211a is an open end. The second slot segment 1211b extends circumferentially along the joint portion 1210a and is used to engage with the ninth latching member 1118 on the inner shell 1110. The eighth snap-fit ​​connector 1212 is connected to the tenth snap-fit ​​connector 1119 on the inner shell 1110. One of the eighth snap-fit ​​connector 1212 and the tenth snap-fit ​​connector 1119 is a groove, and the other is a protrusion that snaps into the groove. For example, the eighth snap-fit ​​connector 1212 is a groove, and the tenth snap-fit ​​connector 1119 is a protrusion.

[0100] Please refer to Figure 15 The first wire control mechanism 1210 is further provided with a second threading hole 1213 communicating with the inner cavity of the inner shell 1110. The second threading hole 1213 includes a third sub-hole segment 1213a and a fourth sub-hole segment 1213b. The third sub-hole segment 1213a is located near the end of the fourth sub-hole segment 1213b, and the diameter of the third sub-hole segment 1213a is larger than the diameter of the fourth sub-hole segment 1213b, so that a second stepped surface is formed at the intersection of the third sub-hole segment 1213a and the fourth sub-hole segment 1213b. The second threading hole 1213 is used to connect with the second control wire. The second control wire may include a second wire body and a second connecting segment. The second connecting segment is a tube and is sleeved on the near end of the second wire body. After being clamped and deformed by a clamp, it is fixed to the second wire body. The second connecting segment can abut against the second stepped surface at the intersection of the third sub-hole segment 1213a and the fourth sub-hole segment 1213b. It should be noted that when the second control wire includes the first sub-control wire and the second sub-control wire, the actual second wire body includes the first sub-control wire and the second sub-control wire.

[0101] Please refer to this again. Figure 16 and Figure 17 The second wire-controlled mechanism 1220 includes a bottom wall 1220a, an inner baffle wall 1220b, and an outer baffle wall 1220c. The inner baffle wall 1220b is disposed inside the outer baffle wall 1220c, and the bottom wall 1220a is disposed at the proximal ends of the inner baffle wall 1220b and the outer baffle wall 1220c. The inner baffle wall 1220b is used for detachable connection with the inner shell 1110.

[0102] The inner circumferential surface of the inner baffle 1220b is provided with a thirteenth snap-fit ​​member 1221 and a fourteenth snap-fit ​​member 1222. The thirteenth snap-fit ​​member 1221 is a protrusion and is used to insert into the fourth groove segment 1116b of the eleventh snap-fit ​​member 1116. One of the fourteenth snap-fit ​​member 1222 and the twelfth snap-fit ​​member 1117 is a groove, and the other is a protrusion that snaps into the groove. For example, the fourteenth snap-fit ​​member 1222 is a protrusion, and the twelfth snap-fit ​​member 1117 is a groove.

[0103] The second wire control mechanism 1220 is also provided with a third threading hole 1223. Specifically, the second wire control mechanism 1220 is provided with a protrusion 1224, which is located on the inner side of the inner baffle wall 1220b, and the protrusion 1224 is provided with the third threading hole 1223. The third threading hole 1223 includes a fifth sub-hole segment 1223a and a sixth sub-hole segment 1223b. The fifth sub-hole segment 1223a is located near the end of the sixth sub-hole segment 1223b, and the diameter of the fifth sub-hole segment 1223a is larger than the diameter of the sixth sub-hole segment 1223b, so that the intersection of the fifth sub-hole segment 1223a and the sixth sub-hole segment 1223b forms a third stepped surface. The third threading hole 1223 is used to connect to the proximal end of the first control wire. The first control wire may include a first wire body and a first connecting segment. The first connecting segment may be a tube and sleeved on the proximal end of the first wire body. After being clamped and deformed by a clamp, the first connecting segment is fixed to the proximal end of the first wire body. The first connecting segment is used to abut against the third stepped surface at the intersection of the fifth sub-hole segment 1223a and the sixth sub-hole segment 1223b.

[0104] Furthermore, this embodiment of the invention also provides a medical system, which includes the aforementioned delivery device and the medical implant. The medical implant includes an artificial blood vessel 10 and a stent 20. The stent 20 includes a main stent 21 and a branch stent 22. The proximal end of the main stent 21 is connected to the artificial blood vessel 10, and the proximal end of the branch stent 22 is connected to the side of the main stent 21. In actual use, the artificial blood vessel 10 is fitted onto the outer peripheral surface of the first support segment 2010 and is supported by the first support segment 2010. The main stent 21 is radially contractible and detachably fitted onto the outer peripheral surface of the second support segment 2020, and the branch stent 22 is radially contractible and detachably fitted onto the outer peripheral surface of the third support segment 2030.

[0105] The assembly process of the medical system is as follows:

[0106] First, assemble the support part 2000. The assembly process can be as described above and will not be repeated here.

[0107] Then, the first wire body of the first control wire and the second wire body of the second control wire are passed through the corresponding fourth threading hole 1112a on the reinforcing rib of each sub-shell 1110a, and the proximal end of the second wire body is passed through the through hole 1110b on the inner shell 1110. The distal ends of both the first wire body and the second wire body are located outside the distal end of the inner shell 1110, and the proximal ends of both the first wire body and the second wire body are located outside the proximal end of the inner shell 1110b.

[0108] Next, the support 2000 is assembled with the inner shell 1110. Specifically, one of the second snap-fit ​​pieces 2112 on the first support rod 2100 is inserted into the first snap-fit ​​piece 1111 of one of the sub-shells 1110a, and then the other second snap-fit ​​piece 2112 on the first support rod 2100 is inserted into the first snap-fit ​​piece 1111 of the other sub-shell 1110a. Then, the two sub-shells 1110a are fastened together, and the second connecting post 1110d is inserted into the corresponding fifth connecting hole 1110c.

[0109] Then, the fixing sleeve is fitted onto the distal end of the inner shell 1110, and the fourth snap-fit ​​member 1115 on the inner shell 1110 is inserted into the sixth snap-fit ​​member 1131 on the fixing sleeve 1130. It should be understood that the fourth snap-fit ​​member 1115 will undergo slight deformation during the process of inserting the fourth snap-fit ​​member 1115 into the sixth snap-fit ​​member 1131, but the fourth snap-fit ​​member 1115 will return to its original shape after being inserted into the sixth snap-fit ​​member 1131.

[0110] Subsequently, the outer shell 1120 is fitted onto a portion of the outer peripheral surface of the inner shell 1110 along the axial direction of the inner shell 1110, such that the fifth snap-fit ​​member 1121 on the outer shell 1120 is inserted into the third snap-fit ​​member 1113 on the inner shell 1110, and the second abutment portion 1122 on the outer shell 1120 passes over the first abutment portion 1114 on the inner shell 1110, such that the proximal end face of the second abutment portion 1122 abuts against the distal end face of the first abutment portion 1114. It should be understood that during the process of the second abutment portion 1122 passing over the first abutment portion 1114, at least one of the first abutment portion 1114 and the second abutment portion 1122 undergoes slight deformation, but after the second abutment portion 1122 passes over the first abutment portion 1114, the deformed abutment portion returns to its original shape. At this point, the housing 1100 is assembled, and the proximal end of the inner housing 1110 protrudes beyond the proximal end of the outer housing 1120.

[0111] Next, the proximal end of the second wire body of the second control wire is passed through the second threading hole of the first wire control mechanism 1210, and the second connecting segment is connected to the proximal end of the second wire body. Then, the second connecting segment is pulled into the third sub-hole segment 1213a.

[0112] Next, the engaging portion 1210a of the first wire control mechanism 1210 is inserted into the proximal end of the inner cavity of the inner shell 1110, and the ninth locking member 1118 on the inner shell 1110 is inserted into the first groove 1211a of the engaging portion 1210a. Then, the first wire control mechanism 1210 is rotated so that the ninth locking member 1118 is inserted into the second groove 1211b. At the same time, the tenth locking member 1119 on the inner shell 1110 is inserted into the eighth locking member 1212 of the first wire control mechanism 1210. It can be understood that during the rotation of the first wire control mechanism 1210, the tenth locking member 1119 undergoes slight deformation, but after the tenth locking member 1119 enters the eighth locking member 1212, the tenth locking member 1119 returns to its original shape. At this time, the first wire control mechanism 1210 and the inner shell 1110 are fixedly engaged.

[0113] Next, the proximal end of the first wire body of the first control wire is passed through the third threading hole 1223, and the proximal end of the first wire body is connected to the first connecting segment, and the first connecting segment is pulled into the fifth sub-hole segment.

[0114] Subsequently, the second wire control mechanism 1220 is fitted over the first wire control mechanism 1210, and the thirteenth latching member 1221 on the second wire control mechanism 1220 is inserted into the third slot 1116a on the inner shell 1110. Then, the second wire control mechanism 1220 is rotated so that the thirteenth latching member 1221 enters the fourth slot 1116b. Simultaneously, the fourteenth latching member 1222 on the second wire control mechanism 1220 is also inserted into the twelfth latching member 1117 on the inner shell 1110. It should be understood that during the rotation of the second wire control mechanism 1220, the fourteenth latching member 1222 undergoes slight deformation, but after entering the twelfth latching member 1117, the fourteenth latching member 1222 returns to its original shape. At this point, the second wire control mechanism 1220 is fixedly engaged with the inner shell 1110.

[0115] It should be noted that the outer diameters of the second wire control mechanism 1220 and the outer diameter of the outer shell 1120 can be reasonably configured so that the outer peripheral surface of the second wire control mechanism 1220 is flush with the outer peripheral surface of the outer shell 1120. Furthermore, the engagement method of the eleventh latching member 1116 and the thirteenth latching member 1221 allows for repeated assembly and disassembly between the inner shell and the second wire control mechanism 1220, preventing the protrusion of the thirteenth latching member 1221 from whitening or even breaking due to excessive force. The engagement method of the seventh latching member 1211 and the ninth latching member 1118 has the same advantages.

[0116] It should also be noted that the support piece 2210 of the outer support structure 2200 can also be installed on the first support rod 2100 after the first support rod 2100 and the inner shell 1110 are assembled. Furthermore, the embodiments of the present invention do not particularly limit the shape of all protrusions. Those skilled in the art can reasonably configure the shape of each protrusion according to actual needs, as long as it can be inserted into the corresponding groove to form a snap-fit ​​fit.

[0117] Furthermore, the medical implant can be loaded onto the support 2000 after the delivery device is assembled. As mentioned above, the first binding wire, the second binding wire, and the third binding wire can be used in any suitable manner available in the prior art to bind the main stent 21 and the branch stent 22; this embodiment of the invention does not limit this. A suitable method is selected based on the specific binding method of the first binding wire, the second binding wire, and the third binding wire on the stent 20 to connect the first control wire to the first binding wire, and to connect the second control wire to the second binding wire and the third binding wire (for cases other than where the second control wire includes a first sub-control wire and a second sub-control wire, and the first sub-control wire and the second binding wire are an integral structure, or the second sub-control wire and the third binding wire are an integral structure). Moreover, the connection operation between the first control wire and the first binding wire can be performed during the assembly of the delivery device or after the delivery device is assembled. The connection operation between the second control wire, the second binding wire, and the third binding wire (for cases where the second control includes a first sub-control wire and a second sub-control wire, and the first sub-control wire and the second binding wire are an integral structure, or the second sub-control wire and the third binding wire are an integral structure) can be performed before the assembly of the conveying device, during the assembly of the conveying device, or after the assembly of the conveying device is completed, depending on the specific needs. Additionally, depending on the actual situation, the first binding wire, the second binding wire, and the third binding wire may also pass through the interior of the handle portion 1000. In this case, the first binding wire, the second binding wire, and the third binding wire can each pass through a fourth threading hole 1112a, and this step is performed before the two sub-housings 1110a are fastened together. After the first control wire is connected to the first binding wire, the distal end of the first control wire is inserted into the first threading hole 2111. It should be understood that when the medical implant is loaded into the delivery device, both the first control wire and the second control wire are taut, thereby abutting the second stepped surface at the intersection of the first connecting segment and the third sub-hole segment 1213a and the fourth sub-hole segment 1213b, and simultaneously abutting the third stepped surface at the intersection of the second connecting segment and the fifth sub-hole segment 1223a and the sixth sub-hole segment 1223b. Furthermore, when the medical implant is loaded into the delivery device, the connecting portion 2420 of the third support rod 2400 abuts the first stepped surface at the intersection of the first sub-hole segment 2123a and the second sub-hole segment 2123b.

[0118] In actual use, the medical system first delivers the medical implant to the target location (i.e., the aortic arch) in the patient's body via the delivery device. Then, the operator can rotate the second wire control mechanism 1220 to disengage the thirteenth snap-fit ​​1221 from the fourth slot 1116b and into the third slot 1116b. Next, the operator pulls the second wire control mechanism 1220 from the distal end to the proximal end to disengage it from the inner shell 1110. This causes the first control wire to move from the distal end to the proximal end, disengaging the distal end of the first control wire from the first threading hole 2111 and releasing the locking of the first binding wire. As a result, the first binding wire can release the binding of the main stent 21, allowing the proximal portion and the main body of the main stent 21 to expand radially. Next, the operator rotates the first wire control mechanism 1210, causing the ninth latching member 1118 to disengage from the second slot 1211b and enter the first slot 1211a. The operator then pulls the first wire control mechanism 1210 from the distal end to the proximal end, causing it to disengage from the inner shell 1110 and move the second control wire from the distal end to the proximal end. Through the movement of the second control wire from the distal end to the proximal end, the first wire control mechanism 1210 releases the locking of the second and third binding wires, thereby releasing the second binding wire from binding the distal portion of the main support 21 and the third binding wire from binding the branch support 22. Thus, the distal portion of the main support 21 expands radially and disengages from the second support section 2020, completing the release of the main support 21, and the branch support 22 expands radially and disengages from the third support section 2030, completing the release of the branch support 22. Finally, the operator controls the handle 1000 to move as a whole from the distal end to the proximal end in order to remove the delivery device from the body.

[0119] While the present invention has been disclosed above, it is not limited thereto. Those skilled in the art can make various modifications and variations to the present invention without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, the present invention also intends to include such modifications and variations.

Claims

1. A conveying device, characterized in that, include: handle part; as well as, The support portion includes a first support segment, a second support segment, and a third support segment. The first support segment is connected to the distal end of the handle portion. The first support segment and the second support segment are arranged and connected to each other along the direction from the proximal end to the distal end of the support portion. The outer diameter of the first support segment is larger than the outer diameter of the second support segment. The third support segment is connected to the second support segment and extends radially along the second support segment at the connection position between the second support segment and the third support segment. The support portion includes a first support rod and an outer support structure. The first support rod includes a first segment and a second segment. The proximal end of the first segment is connected to the distal end of the handle portion, and the proximal end of the second segment is connected to the distal end of the first segment. The outer support structure includes at least two support plates, which are arranged circumferentially at intervals along the first segment and are mechanically connected to the first segment respectively. The outer support structure and the first segment together constitute the first support segment. The second segment constitutes a part of the second support segment.

2. The conveying device according to claim 1, characterized in that, The first segment and the second segment are connected at an angle. The support portion also includes a second support rod and a third support rod. The second support rod is connected to the distal end of the second segment and extends along the axial direction of the second segment. The second support rod and the second segment together constitute the second support segment. The third support rod is connected to the second segment and extends radially along the second support segment at the connection position between the second support segment and the third support segment. The portion of the third support rod outside the second segment constitutes the third support segment.

3. The conveying device according to claim 1, characterized in that, Each of the support pieces has a circular arc cross-section.

4. The conveying device according to claim 1, characterized in that, The first segment is provided with at least two first connecting hole groups arranged circumferentially, each first connecting hole group including multiple first connecting holes, and the multiple first connecting holes in the same first connecting hole group are spaced apart along the axial direction of the first segment; the inner surface of the support plate is provided with multiple first connecting posts arranged spaced apart along the length direction of the support plate, and the multiple first connecting posts on the same support plate are respectively inserted into the multiple first connecting holes of the same first connecting hole group.

5. The conveying device according to claim 3, characterized in that, The first segment is also provided with a first threading hole, the axis of the first threading hole is inclined relative to the axis of the first segment, and the opening of the first threading hole is located in the gap between two adjacent support pieces.

6. The conveying device according to claim 2, characterized in that, The conveying device further includes a first guide member, the proximal end of the second support rod is mechanically connected to the second segment, and the distal end of the second support rod is mechanically connected to the first guide member; And / or, the conveying device further includes a second guide member disposed at the distal end of the third support rod, the third support rod being mechanically connected to the second segment.

7. The conveying device according to claim 6, characterized in that, The second segment has a second connecting hole extending axially along its distal end face, and a first pin hole extending radially along its distal outer circumference and communicating with the second connecting hole. The first guide has a third connecting hole extending axially along its proximal end face, and a second pin hole extending radially along its proximal side surface and communicating with the third connecting hole. The second support rod includes an inner core and an outer wrapping layer. The proximal and distal ends of the inner core are exposed outside the outer wrapping layer. The proximal end of the inner core has a third pin hole, and the distal end of the inner core has a fourth pin hole. The proximal end of the inner core is inserted into the second connecting hole, and the distal end of the inner core is inserted into the third connecting hole. The conveying device also includes a first pin and a second pin. The first pin is inserted into the first pin hole and the third pin hole, and the second pin is inserted into the second pin hole and the fourth pin hole. And / or, the second segment is provided with a fourth connecting hole extending radially along the second segment, the fourth connecting hole including a first sub-hole segment and a second sub-hole segment that are interconnected, the inner diameter of the first sub-hole segment being larger than the inner diameter of the second sub-hole segment, so that the connection between the first sub-hole segment and the second sub-hole segment forms a first stepped surface; the proximal end of the third support rod is inserted into the fourth connecting hole and is used to abut against the first stepped surface.

8. The conveying device according to claim 2, characterized in that, The delivery device is used to load medical implants, which include stents; The handle includes a housing and a wired control assembly, which is detachably connected to the housing and is used to control the bracket to retract radially and connect to the support, or to control the bracket to expand radially and detach from the support; the distal end of the housing is mechanically connected to the proximal end of the support, and the support and the housing remain relatively stationary.

9. The conveying device according to claim 8, characterized in that, The housing includes an inner shell, an outer shell, and a fixing sleeve; the inner shell is partially disposed inside the outer shell, and there is a gap between the distal outer peripheral surface of the inner shell and the distal inner peripheral surface of the outer shell; the fixing sleeve is partially disposed within the gap, and the fixing sleeve also covers the distal end face of the inner shell. The inner shell is mechanically connected to the outer shell, the fixing sleeve, and the first support rod, and the inner shell is also mechanically connected to the fixing sleeve.

10. The conveying device according to claim 9, characterized in that, The inner shell has a plurality of first snap-fit ​​pieces arranged at intervals along the circumference on its distal inner circumferential surface, and the first support rod has a plurality of second snap-fit ​​pieces arranged at intervals along the circumference on its proximal outer circumferential surface. One of the first snap-fit ​​pieces and the second snap-fit ​​piece is a groove, and the other is a protrusion for snapping into the groove. And / or, the outer circumferential surface of the inner shell is provided with a third snap-fit ​​member extending axially, the proximal outer circumferential surface of the inner shell is also provided with a first abutment portion extending circumferentially, and the distal outer circumferential surface of the inner shell is provided with a fourth snap-fit ​​member extending circumferentially; the outer shell includes a shell body and an annular first retaining ring, the inner circumferential surface of the shell body is provided with a fifth snap-fit ​​member extending axially, the first retaining ring is disposed at the proximal end of the shell body, and the inner circumferential surface of the first retaining ring is provided with a second abutment portion extending circumferentially; the fixing sleeve includes a cylindrical retaining ring and a second retaining ring disposed at the distal end of the cylindrical retaining ring, the inner circumferential surface of the cylindrical retaining ring is provided with a sixth snap-fit ​​member extending circumferentially; Both the first abutting portion and the second abutting portion are protrusions, and the distal end face of the first abutting portion abuts against the proximal end face of the second abutting portion; one of the three locking members and the fifth locking member is a groove, and the other is a protrusion that fits into the groove; one of the fourth locking member and the sixth locking member is a groove, and the other is a protrusion that fits into the groove. And / or, the third snap-fit ​​element is a groove; the outer circumferential surface of the inner shell is provided with at least one set of axially extending protrusions, the protrusions including two protrusions spaced apart circumferentially along the inner shell, and the space between the two protrusions forms the third snap-fit ​​element.

11. The conveying device according to claim 9, characterized in that, The support includes a main support and a branch support, and the branch support is connected to the side of the main support; The proximal end of the inner shell protrudes beyond the proximal end of the outer shell; the wired control assembly includes a first wired control mechanism and a second wired control mechanism. The first wired control mechanism is detachably connected to the inner shell and is used to control the distal portion of the main support and the branch support to retract radially and connect with the support portion, or to control the distal portion of the main support and the branch support to expand radially and detach from the support portion; the second wired control mechanism is disposed outside the first wired control mechanism and covers a portion of the proximal outer peripheral surface of the inner shell, and is detachably connected to the inner shell. The second wired control mechanism is used to control the proximal portion and the main body portion of the main support to retract radially and connect with the support portion, or to control the proximal portion and the main body portion of the main support to expand radially and detach from the support portion.

12. The conveying device according to claim 11, characterized in that, The first wire-controlled mechanism includes a cylindrical joint, on the outer circumferential surface of which a seventh locking member and an eighth locking member are provided; the seventh locking member is a slot and includes a first slot segment and a second slot segment that are interconnected, the first slot segment extends axially along the joint and the distal end of the first slot segment is an open end, and the second slot segment extends circumferentially along the joint; the inner circumferential surface of the inner shell is provided with a ninth locking member and a tenth locking member, the ninth locking member is a protrusion and is used to insert into the second slot segment, and one of the eighth locking member and the tenth locking member is a groove and the other is a protrusion that engages with the groove.

13. The conveying device according to claim 11, characterized in that, The second wire control mechanism includes a bottom wall, an inner baffle wall, and an outer baffle wall. The inner baffle wall is disposed inside the outer baffle wall and is also detachably connected to the inner shell. The outer peripheral surface of the outer baffle wall is flush with the outer peripheral surface of the outer shell. The bottom wall is connected to the proximal end of the outer baffle wall and the inner baffle wall.

14. The conveying device according to claim 13, characterized in that, The inner shell has an eleventh and a twelfth snap-fit ​​component on its proximal outer circumferential surface, and the inner baffle wall has a thirteenth and a fourteenth snap-fit ​​component on its inner circumferential surface. The eleventh snap-fit ​​component is a groove and includes a third and a fourth groove segment that are interconnected. The third groove segment extends axially along the inner shell and has an open end at its proximal end. The fourth groove segment extends circumferentially along the inner shell. The thirteenth snap-fit ​​component is a protrusion and is used to insert into the fourth groove segment. One of the twelfth and fourteenth snap-fit ​​components is a groove, and the other is a protrusion that snaps into the groove.

15. The conveying device according to claim 11, characterized in that, The first wire control mechanism is further provided with a second threading hole, which includes a third sub-hole segment and a fourth sub-hole segment. The third sub-hole segment is located near the end of the fourth sub-hole segment, and the diameter of the third sub-hole segment is larger than the diameter of the fourth sub-hole segment. The second wire control mechanism is further provided with a third threading hole, which includes a fifth sub-hole segment and a sixth sub-hole segment. The fifth sub-hole segment is connected to the near end of the sixth sub-hole segment, and the inner diameter of the fifth sub-hole segment is larger than the inner diameter of the sixth sub-hole segment. And / or, the inner circumferential surface of the inner shell is provided with a plurality of reinforcing ribs arranged at intervals along the axial direction, and the reinforcing ribs are provided with a plurality of fourth through holes.

16. A medical system, characterized in that, include: The conveying device as described in any one of claims 1-15; as well as, A medical implant for detachably mounting on the delivery device, comprising an artificial blood vessel and a stent, the stent comprising a main stent and a branch stent, the proximal end of the main stent being connected to the distal end of the artificial blood vessel, and the proximal end of the branch stent being connected to the side of the main stent; wherein, The artificial blood vessel is used to be fitted onto the outer peripheral surface of the first support segment and is stretched open by the first support segment; the main stent is radially contracted and fitted onto the outer peripheral surface of the second support segment, and the branch stent is radially contracted and fitted onto the outer peripheral surface of the third support segment.

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