Delivery system and medical instrument

Abstract

The invention provides a conveying system and a medical instrument. The delivery system includes a handle body, a branch channel establishment assembly, and a bundle diameter adjustment assembly. And the bending degree of the deformable part in the second state is greater than that of the deformable part in the first state. The compression degree of the intravascular stent in the fourth state is smaller than that of the intravascular stent in the third state. The deformable part can move in the axial direction of the handle body so that the far end of the deformable part can move to the open window of the intravascular stent, and the deformable part in the second state can stretch out of the open window. According to the intravascular stent, the branch channel establishing assembly and the beam diameter adjusting assembly are matched with each other, when the intravascular stent is in the fourth state, the deformable part in the second state extends out of the open window, and the branch channel is accurately established, so that the accuracy of the branch channel is improved, and the treatment effect is improved.

Description

Technical Field

[0001] The present application belongs to the field of branch stent technology, and specifically relates to a delivery system and a medical device. Background Art

[0002] In the field of medical device technology, the treatment of aortic aneurysms and dissections involving the ascending aorta or aortic arch is still difficult, especially the reconstruction of branch vessels on the aortic arch, such as the innominate artery, left common carotid artery, left subclavian artery, etc. Vascular stents can be introduced into blood vessels to reconstruct blood vessels. Among them, the pre-buried guide wire and branch blood vessels need to be introduced into the branch blood vessels to establish a branch channel. However, in related technologies, the accuracy of establishing a branch channel is low, which affects the treatment effect and even causes the disease to worsen. Summary of the invention

[0003] In view of this, the first aspect of the present application provides a delivery system, the delivery system comprising:

[0004] handle body;

[0005] a branch channel establishing component, disposed on the handle body, the branch channel establishing component comprising a deformable portion, the deformable portion having a first state and a second state, the bending degree of the deformable portion in the second state being greater than the bending degree of the deformable portion in the first state; and

[0006] a beam diameter adjustment component, arranged on the handle body, and used to adjust the blood vessel stent from a third state to a fourth state, wherein the compression degree of the blood vessel stent in the fourth state is less than the compression degree of the blood vessel stent in the third state;

[0007] Wherein, the branch channel establishing component passes through the vascular stent, and when the vascular stent is in the third state, the branch channel establishing component is in the first state, and when the vascular stent is in the fourth state, the branch channel establishing component is in the second state; the deformable portion can move along the axial direction of the handle body so that the distal end of the deformable portion moves to the window of the vascular stent, and the deformable portion in the second state can extend from the window.

[0008] Wherein, the deformable portion comprises a pre-buried guide wire, the distal end of which is used to extend from the window; wherein, the pre-buried guide wire is in a bent state.

[0009] Wherein, the deformable portion also includes a pre-buried catheter sleeved on the outer peripheral side of the pre-buried guide wire, and the pre-buried catheter can move relative to the pre-buried guide wire to guide the pre-buried guide wire to extend from the window; wherein, the distal end of the pre-buried catheter is in a bent state.

[0010] Among them, the branch channel establishment component also includes a first connecting tube and a catheter seat, the first connecting tube is closer to the handle body than the catheter seat, the pre-buried guide wire is inserted into the first connecting tube and the catheter seat, the catheter seat is in a fixed state when threadedly connected to the first connecting tube, and is in an adjustable state when separated from the first connecting tube, so that the catheter seat can move in a direction away from or close to the first connecting tube, and can also rotate relative to the first connecting tube to allow the pre-buried guide wire to extend from the window.

[0011] The pre-buried catheter is inserted into the first connecting tube and the catheter seat, and the catheter seat can also move the pre-buried guide wire and the pre-buried catheter to the window of the vascular stent.

[0012] Wherein, the bundle diameter adjustment component includes a bundle diameter guidewire, and the bundle diameter guidewire is used to put the vascular stent in the third state. The bundle diameter adjustment component can move axially along the handle body to pull the bundle diameter guidewire to change the vascular stent from the third state to the fourth state.

[0013] Among them, the beam diameter adjustment component also includes a second connecting tube and a pull ring. The second connecting tube is closer to the handle body than the pull ring. The beam diameter guide wire is passed through the second connecting tube and connected to the pull ring. The pull ring is in a fixed state when threadedly connected to the second connecting tube, and is in a pullable state when separated from the second connecting tube, so that the pull ring can move in a direction away from the second connecting tube to pull the beam diameter guide wire.

[0014] Wherein, the delivery system further comprises a release component arranged on the handle body, and the release component is used to put the vascular stent in a restrained state.

[0015] Wherein, the release assembly comprises a plurality of release guidewires, and the distal end of each of the release guidewires is used to penetrate at least one anchoring ring of the vascular stent, so that the vascular stent is in the restrained state.

[0016] Wherein, the release assembly further comprises a control member, the release guide wire is connected to the control member, and the control member can move along the axial direction of the handle body so that the release guide wire is arranged outside the anchoring ring.

[0017] Among them, the release guide wire is inserted into the handle body, the control member is sleeved on the handle body, a first limiting portion is provided on the inner circumference of the control member, and a second limiting portion is provided on the outer circumference of the handle body. When the first limiting portion is engaged with the second limiting portion, the control member is in a fixed state. When the first limiting portion is rotated to be separated from the second limiting portion, the control member is in a movable state, so that the control member moves relative to the handle body.

[0018] Among them, the release assembly also includes a fixing part, which includes a base and a slider protruding from the base. The base is arranged in the handle body and is used to connect the release guide wire. The peripheral side of the handle body has a first sliding hole arranged along the axial direction of the handle body. The slider is arranged in the first sliding hole and connected to the control member.

[0019] Among them, the handle body includes a first part and a second part that are connected, the first part is closer to the distal end of the deformable part than the second part, the beam diameter adjustment component and the branch channel establishment component are respectively arranged on opposite sides of the first part, and the release component is arranged in the second part.

[0020] Among them, the conveying system also includes a catheter assembly arranged on the handle body, the catheter assembly includes a first guide tube and a second guide tube, the vascular stent is inserted into the distal end of the first guide tube and is sleeved on the distal outer peripheral side of the second guide tube, and the first guide tube can move relative to the second guide tube along the axial direction of the handle body to expose the vascular stent.

[0021] Among them, the catheter assembly also includes a bending adjustment piece and a bending adjustment wire, the bending adjustment piece is sleeved on the first guide tube, one end of the bending adjustment wire is fixed to the first guide tube, and the other end of the bending adjustment wire is passed through the bending adjustment piece; the bending adjustment piece can slide relative to the first guide tube to pull the bending adjustment wire so that the distal end of the first guide tube is in a bent state.

[0022] Wherein, the catheter assembly also includes a second rotating member and a second fixed member, the second rotating member is sleeved on the second fixed member, the second fixed member is connected to the first guide tube and sleeved on the second guide tube; the second rotating member can rotate relative to the second guide tube to drive the second fixed member and the first guide tube to slide relative to the second guide tube.

[0023] A second aspect of the present application provides a medical device, which includes a vascular stent and a delivery system as provided in the first aspect of the present application.

[0024] The medical device provided in the second aspect of the present application adopts the delivery system provided in the first aspect of the present application, and makes the branch channel establishment component and the beam diameter adjustment component cooperate with each other. When the vascular stent is in the fourth state, the deformable portion in the second state extends out from the window to accurately establish the branch channel, so as to improve the accuracy of the branch channel and improve the treatment effect.

[0025] Wherein, the vascular stent comprises a stent body, and a plurality of wire binding rings arranged around the stent body, and the bundle diameter adjustment component comprises a bundle diameter guide wire, and the bundle diameter guide wire is passed through the plurality of wire binding rings, so that the vascular stent is in the third state;

[0026] Wherein, the wire binding ring comprises a fixed portion for fixing to the stent body, and a ring portion for being passed through by the binding wire;

[0027] When the vascular stent is in the third state, the guide wire extends around the outer circumference of the stent body and compresses the vascular stent in the radial direction of the vascular stent, and the ring portion of the wire binding ring at least partially overlaps the vascular stent in the axial direction and is passed through by the guide wire, so that the wire binding ring maintains a state of compressing the vascular stent.

[0028] Wherein, the wire binding ring is arranged on the outer periphery of the stent body, the number of the wire binding ring is at least one, and the wire binding ring includes a binding end away from the fixed part;

[0029] When the vascular stent is in the third state, the bundle wire extends more than a full circle around the outer circumference of the stent body, and the area of ​​the ring portion close to the fixed portion and the area of ​​the ring portion close to the binding end overlap axially and are passed through by the bundle wire.

[0030] Wherein, the wire binding ring is arranged on the outer periphery of the stent body, the number of the wire binding ring is at least two, and the wire binding ring includes a binding end away from the fixed part;

[0031] When the vascular stent is in the third state, the two wire-binding rings extend in opposite directions around the outer circumference of the stent body, and the regions of the ring portions of the two wire-binding rings close to the respective binding ends overlap in the axial direction and are passed through by the binding guidewire.

[0032] The wire binding ring is arranged in the inner cavity of the stent body, the number of the wire binding ring is at least two, and the wire binding ring comprises two oppositely arranged fixed parts and a binding end arranged between the two fixed parts;

[0033] When the vascular stent is in the third state, the regions of the ring portions of the two wire-binding rings close to the respective binding ends overlap on the central axis of the stent body and are passed through by the binding guide wire.

[0034] Beneficial effects:

[0035] The present application discloses a delivery system for establishing a branch channel. The branch channel establishment component includes a deformable portion, which can move along the axial direction of the handle body, and the deformable portion can change its bending degree to switch between a first state and a second state. The beam diameter adjustment component can control the vascular stent to switch from the fourth state to the third state. In other words, the beam diameter adjustment component can control the expansion degree of the vascular stent.

[0036] When the vascular stent is in the third state with a greater degree of compression, the deformable portion is in the first state with a smaller degree of bending due to being limited by the compression of the vascular stent in the vascular stent, and the deformable portion cannot extend from the window of the vascular stent. At this time, since the vascular stent is in the third state with a greater degree of compression, that is, the radial dimension of the vascular stent is smaller and does not stick to the inner wall of the blood vessel, the inner wall of the blood vessel will not be scratched when moving. The position of the handle body can be adjusted to adjust the position of the vascular stent relative to the blood vessel so that the window of the vascular stent can be aligned with the branch blood vessel.

[0037] Then, the bundle diameter adjustment component is used to convert the vascular stent from the third state to the fourth state. At this time, the inner diameter of the vascular stent increases and can be close to the inner wall of the blood vessel to play a positioning role. The vascular stent is no longer easily displaced relative to the blood vessel.

[0038] When the vascular stent is in the fourth state with a smaller degree of compression, the vascular stent at least partially expands, and the deformable portion can move along the axial direction of the handle body to the window close to the vascular stent. At this time, since the vascular stent no longer compresses and constrains the deformable portion, the deformable portion recovers to the second state with a larger degree of bending under its own elasticity, which is convenient for pushing forward and extending out from the window. In the process of pushing the branch channel establishment component forward, since the vascular stent is adjusted by the bundle diameter adjustment component to be close to the inner wall of the blood vessel, it will not be pushed and displaced in the process, thereby ensuring that the branch channel establishment component accurately enters the branch channel through the window, thereby accurately establishing the branch channel.

[0039] Therefore, the present application enables the branch channel establishment component and the bundle diameter adjustment component to cooperate with each other, so that when the vascular stent is in the fourth state with a larger diameter, it can be in contact with the inner wall of the blood vessel, thereby fixing the vascular stent; the deformable portion is in the second state with a larger degree of bending, which is convenient for being pushed out of the window, and the vascular stent will not be displaced during the pushing process to cause misalignment between the window and the branch blood vessel, thereby achieving precise establishment of the branch channel to improve the accuracy of the branch channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the implementation modes of the present application will be described below.

[0041] Figure 1 A schematic diagram of the structure of a conveying system provided in one embodiment of the present application.

[0042] Figure 2 A schematic structural diagram of a conveying system provided in another embodiment of the present application.

[0043] Figure 3 A schematic structural diagram of a conveying system provided in yet another embodiment of the present application.

[0044] Figure 4 A schematic diagram of the structure of a vascular stent provided in one embodiment of the present application.

[0045] Figure 5 A schematic diagram of the local structure of a conveying system provided in one embodiment of the present application Figure 1 .

[0046] Figure 6 A schematic diagram of the local structure of a conveying system provided in one embodiment of the present application Figure 2 .

[0047] Figure 7 A schematic diagram of the structure of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 1 .

[0048] Figure 8 A schematic diagram of the structure of a vascular stent and a pre-buried catheter provided in one embodiment of the present application.

[0049] Fig. 9 A local structural explosion of a conveying system provided in one embodiment of the present application Figure 1 .

[0050] Fig.10 A partial cross-sectional view of a delivery system provided in one embodiment of the present application Figure 1 .

[0051] Fig.11 A schematic diagram of the local structure of a conveying system provided in one embodiment of the present application Figure 3 .

[0052] Fig.12 A local structural explosion of a conveying system provided in one embodiment of the present application Figure 2 .

[0053] Fig.13 A partial cross-sectional view of a delivery system provided in one embodiment of the present application Figure 2 .

[0054] Fig.14 A schematic diagram of the structure of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 2.

[0055] Fig.15 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 1 .

[0056] Fig.16 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 2 .

[0057] Fig.17 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 3 .

[0058] Fig.18 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 4 .

[0059] Fig.19 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 5 .

[0060] Description of reference numerals: delivery system 1, handle body 11, first shell 111, second shell 112, first part 113, second part 114, branch channel establishment component 12, deformable part 121, embedded guide wire 1211, embedded catheter 1212, first connecting tube 122, catheter seat 123, beam diameter adjustment component 13, beam diameter guide wire 131, second connecting tube 132, pull ring 133, locking seat 134, catheter component 14, first guide tube 141, second guide tube 142, guide head 143 , first fixing member -144, bending adjustment member -1451, bending adjustment wire -1452, bending adjustment inner tooth -1453, first rotating member -1454, second rotating member -1461, second fixing member -1462, buckle member -1463, support rod -15, release assembly -16, release guide wire -161, control member -162, fixing part -163, base -1631, slider -1632, vascular stent -2, stent body -21, window -22, anchoring ring -23, wire binding ring -24, fixed part -241, ring part -242, binding end -243. DETAILED DESCRIPTION

[0061] The following are preferred implementations of the present application. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

[0062] Before introducing the present application, the related technical issues are introduced again in detail.

[0063] Aortic diseases mainly include true aortic aneurysms, false aortic aneurysms, and dissecting aneurysms. Due to various pathological changes, the aorta can expand locally to form true aneurysms, the vascular wall can tear to form dissecting aneurysms, or false aneurysms can form hematomas due to trauma. Aortic diseases seriously threaten human life and health. If not treated in time, once the aneurysm ruptures, the body will be short of blood supply in a short period of time, causing the patient's death.

[0064] Currently, the main methods for treating aortic diseases are surgery and intravascular interventional therapy. Surgery is the traditional open surgery, which involves thoracotomy or laparotomy for different lesion locations. This treatment method is highly traumatic to patients and has a slow recovery. It is a great challenge for the elderly, weak, or patients who cannot tolerate major surgery. The intravascular interventional therapy (TEVAR&EVAR) that has been slowly developed in modern times has the advantages of less trauma to patients, higher safety, and faster postoperative recovery. Therefore, this procedure has been increasingly widely used and developed rapidly.

[0065] The medical devices used in intravascular interventional treatment are mainly to pre-load the vascular stent into the delivery sheath of the delivery device. During the operation, the guide wire replacement technology is used to establish a surgical channel. The delivery sheath can enter the iliac artery, abdominal aorta, thoracic aorta, aortic arch, ascending aorta, aortic valve and other positions along the guide wire. After reaching the designated lesion location, the vascular stent is released. After self-expansion, the vascular stent adheres to the blood vessel wall, isolates the lesion location of the aneurysm, eliminates the impact of blood flow on the blood vessel wall at the lesion location, restores the correct direction of blood flow, and achieves the treatment effect.

[0066] At present, there are still difficulties in the treatment of aortic aneurysms and dissections involving the ascending aorta or aortic arch, especially the reconstruction of the branch vessels on the aortic arch (innominate artery, left common carotid artery, left subclavian artery), which is a great challenge. There are no commercial products on the market that can simultaneously reconstruct three branch vessels. At present, the main treatment methods for aortic arch lesions include arch open surgery, fenestration technology, chimney technology, branch stent technology, etc.

[0067] Several existing treatment methods have the following disadvantages. Arch open surgery is traumatic, complicated, and has many postoperative complications, which is not suitable for the elderly or patients who cannot tolerate major surgery; the fenestration technique is to open a window on the structure of the main stent, which destroys the stability of the original structure, and the external branch stent also has the risk of internal leakage; the chimney technique, the main stent and the branch stent are reconstructed side by side, and the branch stent is easily squeezed by the main stent, resulting in a low long-term patency rate, and there are also risks such as Gutter internal leakage.

[0068] Please refer to Figure 1-Figure 7 , Figure 1A schematic diagram of the structure of a conveying system provided in one embodiment of the present application. Figure 2 A schematic structural diagram of a conveying system provided in another embodiment of the present application. Figure 3 A schematic structural diagram of a conveying system provided in yet another embodiment of the present application. Figure 4 A schematic diagram of the structure of a vascular stent provided in one embodiment of the present application. Figure 5 A schematic diagram of the local structure of a conveying system provided in one embodiment of the present application Figure 1 . Figure 6 A schematic diagram of the local structure of a conveying system provided in one embodiment of the present application Figure 2 . Figure 7 A schematic diagram of the structure of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 1 .

[0069] This embodiment provides a delivery system 1, which includes a handle body 11, a branch channel establishment component 12, and a beam diameter adjustment component 13. The branch channel establishment component 12 is disposed on the handle body 11, and includes a deformable portion 121, wherein the deformable portion 121 has a first state and a second state, and the bending degree of the deformable portion 121 in the second state is greater than the bending degree of the deformable portion 121 in the first state. The beam diameter adjustment component 13 is disposed on the handle body 11, and is used to adjust the blood vessel stent 2 from the third state to the fourth state, and the compression degree of the blood vessel stent 2 in the fourth state is less than the compression degree of the blood vessel stent 2 in the third state.

[0070] Among them, the branch channel establishment component 12 passes through the vascular stent 2, when the vascular stent 2 is in the third state, the branch channel establishment component 12 is in the first state, and when the vascular stent 2 is in the fourth state, the branch channel establishment component 12 is in the second state; the deformable portion 121 can move along the axial direction of the handle body 11 so that the distal end of the deformable portion 121 moves to the window 22 of the vascular stent 2, and the deformable portion 121 in the second state can extend from the window 22.

[0071] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order.

[0072] It should be noted that, for medical devices used in intravascular interventional surgery (medical devices used to implant vascular stents 2 into blood vessels), the end of the delivery system 1 close to the operator is usually defined as the proximal end, while the end away from the operator is defined as the distal end. For vascular stents 2 (medical devices used to be implanted into blood vessels), the definition is different from that of the delivery devices. Specifically, the end close to the human heart is defined as the proximal end (or proximal end) of the vascular stent 2, and the end away from the human heart is defined as the distal end (or distal end).

[0073] The main components of the delivery system 1 of this embodiment include a catheter assembly 14, a pre-buried guide wire 1211, a pre-buried catheter 1212, a bundle diameter guide wire 131, a release guide wire 161, a support rod 15, a bundle diameter adjustment assembly 13, a branch channel establishment assembly 12, and a release assembly 16.

[0074] For example, in the reconstruction of the aortic arch and the three branches of the aortic arch, it is necessary to release the ascending aortic stent, then release the innominate artery branch stent and the left common carotid artery branch stent, then release the arch stent, and finally release the left subclavian artery branch stent. The modular design ensures the entire release process and the cerebral blood supply is continuously maintained. Among them, the delivery system 1 of this embodiment can be used to release the arch stent.

[0075] The catheter assembly 14 includes a first guide tube 141 and a second guide tube 142. The vascular stent 2 is inserted into the distal end of the first guide tube 141 and is sleeved on the distal outer peripheral side of the second guide tube 142. The first guide tube 141 can move axially along the handle body 11 relative to the second guide tube 142 to expose the vascular stent 2.

[0076] The distal end of the support rod 15 is passed through the first guide tube 141, and the proximal end of the support rod 15 is connected to the control device. The support rod 15 has at least one accommodating hole arranged along the axial direction of the support rod 15, and the accommodating hole is used to accommodate at least one of the second guide tube 142, the embedded guide wire 1211, the bundle diameter guide wire 131, and the release guide wire 161.

[0077] The support rod 15 is fixedly connected to the tail of the handle body 11. The support rod 15 can be moved by moving the entire handle body 11. The support rod 15 is mainly composed of a polymer multi-lumen tube, a stainless steel tube, a push rod fixing member and an infusion tube, which are fixedly connected in sequence in the axial direction. The sealing of the tail of the support rod 15 is ensured by a sealing gasket and a sealing end cover structure.

[0078] This embodiment provides a delivery system 1 for establishing a branch channel. Among them, the handle body 11 can move relative to the blood vessel, driving the branch channel establishment component 12 and the beam diameter adjustment component 13 to move relative to the blood vessel. The branch channel establishment component 12 includes a deformable portion 121, and the deformable portion 121 can move along the axial direction of the handle body 11, and the deformable portion 121 has a certain elasticity. It is in a bent state (called the second state) in a natural state, and can change its bent state (called the first state) when it is subject to a restraining force. When the restraining force is removed, it can elastically return to the bent state in the natural state. In other words, the bending shape of the deformable portion 121 can be converted between the first state and the second state.

[0079] The beam diameter adjustment component 13 can adjust the radial size of the vascular stent 2. The vascular stent 2 has a certain elasticity. In the natural state, it is in an expanded state with a larger diameter (called the fourth state). When it is subjected to a radial constraint force, its radial size is reduced and it is in a compressed state (called the third state). In other words, the compression degree of the vascular stent 2 in the fourth state is less than the compression degree of the vascular stent 2 in the third state, or in other words, the diameter of the vascular stent 2 in the fourth state is greater than the diameter of the vascular stent 2 in the third state. When the vascular stent 2 is in a compressed state (called the third state), it does not stick to the inner wall of the blood vessel and does not scratch the inner wall of the blood vessel when moving. When the vascular stent 2 is in an expanded state (called the fourth state), it sticks to the inner wall of the blood vessel, plays a positioning or anchoring effect, and is not easy to move relative to the blood vessel. Among them, the process of the beam diameter adjustment component 13 making the vascular stent 2 change from the third state to the fourth state is called releasing the vascular stent 2.

[0080] The deformable portion 121 is disposed inside the vascular stent 2, so when the vascular stent 2 is in a compressed state (called the third state), a restraining force is applied to the deformable portion 121, so that it is in a relatively straight first state. When the vascular stent 2 is in an expanded state (called the fourth state), no restraining force is applied to the deformable portion 121, and the deformable portion 121 changes from the first state to the second state under its own elasticity, that is, the deformable portion 121 is in a more curved state.

[0081] When the vascular stent 2 is in a compressed state (referred to as the third state), the window 22 thereon is folded, and when the vascular stent 2 is in an expanded state (referred to as the fourth state), the window 22 of the vascular stent 2 is unfolded so that the deformable portion 121 can extend from the window 22. For example, when the vascular stent 2 is in the third state, the vascular stent 2 is completely compressed; when the vascular stent 2 is in the fourth state, the vascular stent 2 is partially released, or fully released. For another example, when the vascular stent 2 is in the third state, the vascular stent 2 is partially released; when the vascular stent 2 is in the fourth state, the vascular stent 2 is fully released.

[0082] When the vascular stent 2 is in the third state with a greater degree of compression, the deformable portion 121 is in the first state with a lesser degree of bending, at which time the window 22 is folded, and the deformable portion 121 cannot extend from the window 22 of the vascular stent 2. At this time, since the vascular stent 2 is compressed and has a smaller diameter, it does not abut against the inner wall of the blood vessel, and the position of the vascular stent 2 relative to the blood vessel can be adjusted by adjusting the position of the handle body 11, and the inner wall of the blood vessel will not be scratched in the process.

[0083] After the beam diameter adjustment component 13 is operated to convert it from the third state to the fourth state, its diameter increases and can be close to the inner wall of the blood vessel, playing a positioning role, and the vascular stent 2 is no longer easily displaced relative to the blood vessel. In the fourth state, the window 22 of the vascular stent 2 is unfolded. When the vascular stent 2 is in the fourth state with a smaller compression degree (larger diameter), at least part of the vascular stent 2 is released, and the deformable portion 121 can move along the axial direction of the handle body 11, close to the window 22 of the vascular stent 2. At this time, the deformable portion 121 is in the second state with a larger bending degree. The deformable portion 121 is pushed out of the window 22 by pushing the branch channel establishment component 12 forward. Since in this process, the vascular stent 2 in the fourth state is firmly positioned on the inner wall of the blood vessel and will not slide relative to the inner wall of the blood vessel, the vascular stent 2 will not be displaced in the process of pushing the branch channel establishment component 12, causing the window 22 to be misaligned with the branch blood vessel, thereby achieving accurate establishment of the branch channel to improve the accuracy of the branch channel.

[0084] Therefore, in this embodiment, the branch channel establishing component 12 and the beam diameter adjusting component 13 cooperate with each other. When the vascular stent 2 is in the fourth state with a larger diameter, it can be in contact with the inner wall of the blood vessel, thereby fixing the vascular stent 2; the deformable portion 121 is in the second state with a larger degree of bending, which is convenient for being pushed out of the window 22, and the vascular stent 2 will not be displaced during the pushing process to cause the window 22 and the branch blood vessel to be misaligned, thereby achieving precise establishment of the branch channel to improve the accuracy of the branch channel.

[0085] Please refer to Figure 1-Figure 7In one embodiment, the deformable portion 121 includes a pre-buried guide wire 1211, and the distal end of the pre-buried guide wire 1211 is used to extend from the window 22; wherein the pre-buried guide wire 1211 is in a bent state.

[0086] The deformable portion 121 provided in this embodiment includes a pre-embedded guide wire 1211, and the curvature of the pre-embedded guide wire 1211 changes with the curvature of the deformable portion 121. The curvature of the pre-embedded guide wire 1211 in the second state is greater than that of the pre-embedded guide wire 1211 in the first state.

[0087] For example, when the vascular stent 2 is in the third state, the pre-embedded guide wire 1211 is in a straight state; when the vascular stent 2 is in the fourth state, the pre-embedded guide wire 1211 is in a curved state.

[0088] For another example, when the vascular stent 2 is in the third state, the pre-embedded guide wire 1211 is in a pre-bent state; when the vascular stent 2 is in the fourth state, the pre-embedded guide wire 1211 is in a bent state. The pre-embedded guide wire 1211 adopts a pre-bent design, which can enhance the pre-bent effect, so that the pre-embedded guide wire 1211 can present a bent shape when extended, so as to conveniently extend from the lateral window of the stent in a bent shape.

[0089] When the vascular stent 2 is in the third state with a greater degree of compression, the pre-buried guide wire 1211 cannot extend from the window 22 of the vascular stent 2. By adjusting the position of the handle body 11, the position of the vascular stent 2 relative to the blood vessel can be adjusted, so that after the third state is converted to the fourth state, the window 22 of the vascular stent 2 can be aligned with the branch blood vessel, providing a basis for the subsequent precise establishment of the branch channel. When the vascular stent 2 is in the fourth state with a lesser degree of compression, at least part of the vascular stent 2 is released, the deformable portion 121 is in the second state with a greater degree of bending, the pre-buried guide wire 1211 can extend from the window 22, and at least part of the pre-buried guide wire 1211 enters the branch blood vessel to accurately establish the branch channel.

[0090] Please refer to Figure 1-Figure 8 , Figure 8 A schematic diagram of the structure of a vascular stent and a pre-buried catheter provided in one embodiment of the present application. In one embodiment, the deformable portion 121 further includes a pre-buried catheter 1212 sleeved on the outer peripheral side of the pre-buried guide wire 1211, and the pre-buried catheter 1212 can move relative to the pre-buried guide wire 1211 to guide the pre-buried guide wire 1211 to extend from the window 22; wherein the distal end of the pre-buried catheter 1212 is in a bent state.

[0091] The pre-buried catheter 1212 is nested in the pre-buried guide wire 1211. Both the pre-buried catheter 1212 and the pre-buried guide wire 1211 can extend from the window 22. For example, the pre-buried catheter 1212 and the pre-buried guide wire 1211 are first extended from the window 22, and then the pre-buried catheter 1212 is moved relative to the pre-buried guide wire 1211 in a direction away from the window 22, so that the pre-buried guide wire 1211 is exposed from the pre-buried catheter 1212.

[0092] The pre-buried catheter 1212 is a nickel-titanium braided mesh tube, and the head end has a pre-molded angle. The nickel-titanium braided mesh tube makes the pre-buried catheter 1212 have better elasticity and pre-molded shape memory. The pre-molded angle refers to the pre-molded curved shape of the head end, which can remain approximately straight under external force (or when accommodated in the first guide tube 141), and can return to the pre-molded curved shape after the external force is removed. The function of the pre-molded angle is to make the pre-buried catheter 1212, after the curvature is restored, conveniently extend from the window on the side wall of the vascular stent 2 due to the lateral bending of the end.

[0093] Optionally, the pre-buried catheter 1212 is pre-bent, and the pre-bent angle is 80°-110°. The distal end of the pre-buried catheter 1212 has a pre-shaped angle. This arrangement can improve the efficiency of establishing a branch channel. For example, the pre-buried catheter 1212 has a pre-shaped angle at the head end, which facilitates the introduction of the pre-buried guide wire 1211 into the left subclavian artery when the branch vessel opening of the left subclavian artery is selected, and is convenient for the establishment of a pathway when the left subclavian artery is released, saving operation time.

[0094] Optionally, both the pre-buried catheter 1212 and the pre-buried guide wire 1211 adopt a pre-bending design. Because the product is contained in the first guide tube 141 for a long time before entering the operating room, and before the ends of the guide wire and catheter are extended out of the first guide tube 141 during the operation, they are bound to a certain extent into a nearly straight state. The pre-buried guide wire 1211 and the pre-buried catheter 1212 adopt a pre-bending design to enhance the pre-bending effect, so that the pre-buried guide wire 1211 and the pre-buried catheter 1212 can present a curved shape when extending from the first guide tube 141, so as to conveniently extend from the lateral window of the vascular stent 2 in a curved shape.

[0095] The head end of the embedded catheter 1212 has two developing rings, one of which is arranged at the end and the other is arranged at the beginning of the bend. The embedded catheter 1212 has good developing performance.

[0096] Please refer to Figure 1-Figure 9 , Fig. 9 The local structure explosion of the conveying system 1 provided in one embodiment of the present application Figure 1In one embodiment, the branch channel establishment component 12 further includes a first connecting tube 122 and a catheter seat 123, wherein the first connecting tube 122 is closer to the handle body 11 than the catheter seat 123, and the pre-buried guide wire 1211 is inserted into the first connecting tube 122 and the catheter seat 123, and the catheter seat 123 is in a fixed state when being threadedly connected to the first connecting tube 122, and is in an adjustable state when the catheter seat 123 is separated from the first connecting tube 122, so that the catheter seat 123 can move in a direction away from or close to the first connecting tube 122, and can also rotate relative to the first connecting tube 122, so that the pre-buried guide wire 1211 extends out of the window 22.

[0097] When there is no need to move the pre-embedded guide wire 1211, the catheter seat 123 can be threadedly connected to the first connecting tube 122 and be in a fixed state. At this time, the pre-embedded guide wire 1211 cannot move relative to the catheter seat 123 to prevent the position of the pre-embedded guide wire 1211 from being moved at will. When it is necessary to move the pre-embedded guide wire 1211, the catheter seat 123 can be separated from the first connecting tube 122 and be in an adjustable state. The catheter seat 123 can be used to move the pre-embedded guide wire 1211 toward or away from the first connecting tube 122, or rotate relative to the first connecting tube 122 to move the position of the pre-embedded guide wire 1211, so that the pre-embedded guide wire 1211 extends from the window 22 to accurately establish a branch channel.

[0098] Please refer to Figure 1-Figure 9 In one embodiment, the pre-buried catheter 1212 is inserted into the first connecting tube 122 and the catheter seat 123, and the catheter seat 123 can also move the pre-buried guide wire 1211 and the pre-buried catheter 1212 to the window 22 of the vascular stent 2.

[0099] The pre-buried catheter 1212 is sleeved on the pre-buried guide wire 1211, and when the catheter seat 123 is separated from the first connecting tube 122 and is in an adjustable state, the catheter seat 123 can move in a direction away from or close to the first connecting tube 122, and can also rotate relative to the first connecting tube 122, so that the pre-buried catheter 1212 extends out from the window 22.

[0100] By using the catheter seat 123 and the first connecting tube 122, the position of the embedded catheter 1212 can be fixed or adjusted. When there is no need to move the embedded catheter 1212, the catheter seat 123 can be threadedly connected to the first connecting tube 122 and is in a fixed state. At this time, the embedded catheter 1212 cannot move relative to the catheter seat 123 to prevent the position of the embedded catheter 1212 from being moved at will. When it is necessary to move the embedded catheter 1212, the catheter seat 123 can be separated from the first connecting tube 122 and is in an adjustable state. The catheter seat 123 can be used to move the embedded catheter 1212 in a direction close to or away from the first connecting tube 122, or rotate relative to the first connecting tube 122 to move the position of the embedded catheter 1212, so that the embedded catheter 1212 extends from the window 22 to accurately establish a branch channel.

[0101] Furthermore, the position of the pre-buried catheter 1212 relative to the pre-buried guide wire 1211 can be adjusted by using the catheter seat 123 and the first connecting tube 122 , so that the pre-buried guide wire 1211 extends out of the pre-buried catheter 1212 .

[0102] Please refer to Figure 1-Figure 9 In one embodiment, the bundle diameter adjustment component 13 includes a bundle diameter guide wire 131, and the bundle diameter guide wire 131 is used to put the vascular stent 2 in the third state. The bundle diameter adjustment component 13 can move axially along the handle body 11 to pull the bundle diameter guide wire 131 to change the vascular stent 2 from the third state to the fourth state.

[0103] The guide wire 131 is used to compress and bind the stent 2 in the radial direction of the stent 2 so as to facilitate delivery of the stent 2 into the blood vessel. The guide wire 131 is mainly made of nickel-titanium alloy and passes through the small cavity of the support rod 15. The guide wire 131 is arranged in the first guide tube 141.

[0104] The vascular stent 2 in the third state is compressed, and at least part of the vascular stent 2 in the fourth state is released. For example, the proximal end and the distal end of the vascular stent 2 in the third state are completely compressed, and the distal end of the vascular stent 2 in the fourth state is released, and the proximal end is still compressed. The radial size of the vascular stent 2 in the third state is smaller than the radial size of the vascular stent 2 in the fourth state.

[0105] When the bundle diameter guide wire 131 binds the vascular stent 2, the vascular stent 2 is in the third state; when the bundle diameter guide wire 131 is separated from the vascular stent 2, the vascular stent 2 is in the fourth state. In this embodiment, the bundle diameter guide wire 131 is used to first bind the vascular stent 2, so that it is in the compressed third state, so as to facilitate the delivery of the vascular stent 2 into the blood vessel and align it with the position of the branch blood vessel; then the bundle diameter guide wire 131 is used to release at least part of the vascular stent 2, so that the window 22 of the vascular stent 2 is unfolded, so that at least part of the vascular stent 2 is fixed in the blood vessel, and the deformable part 121 can be extended from the window 22 to accurately establish a branch channel.

[0106] Please refer to Figure 1-Figure 9 In one embodiment, the beam diameter adjustment component 13 also includes a second connecting tube 132 and a pull ring 133. The second connecting tube 132 is closer to the handle body 11 than the pull ring 133. The beam diameter guide wire 131 is passed through the second connecting tube 132 and connected to the pull ring 133. The pull ring 133 is in a fixed state when threadedly connected to the second connecting tube 132. The pull ring 133 is in a pullable state when separated from the second connecting tube 132, so that the pull ring 133 can move in a direction away from the second connecting tube 132 to pull the beam diameter guide wire 131.

[0107] The proximal end of the beam diameter guide wire 131 is connected to the pull ring 133. The beam diameter adjustment assembly 13 also includes a locking seat 134 disposed between the second connecting tube 132 and the pull ring 133, and the locking seat 134 can be threadedly connected or separated from the second connecting tube 132. When the locking seat 134 is threadedly connected to the second connecting tube 132, the pull ring 133 and the second connecting tube 132 are in a fixed state; when the locking seat 134 is separated from the second connecting tube 132, the pull ring 133 and the second connecting tube 132 are in a retractable state. The beam diameter guide wire 131 is locked and fixed in the proximal handle body 11 through the locking seat 134 and the second connecting tube 132.

[0108] When there is no need to release the vascular stent 2, there is no need to pull the guide wire 131, and the locking seat 134 can be threadedly connected with the second connecting tube 132 to be in a fixed state. At this time, the guide wire 131 cannot move relative to the second connecting tube 132 to prevent the position of the guide wire 131 from being pulled at will. When it is necessary to pull the guide wire 131, the locking seat 134 can be separated from the second connecting tube 132 to be in a pullable state, and the pull ring 133 can be used to move the guide wire 131 in a direction away from the second connecting tube 132, so that the vascular stent 2 is changed from the third state to the fourth state, and at least part of the vascular stent 2 is released.

[0109] Please refer to Figure 1-Figure 9In one embodiment, the delivery system 1 further includes a release component 16 disposed on the handle body 11 , and the release component 16 is used to put the vascular stent 2 in a restrained state.

[0110] The release component 16 is used to compress the proximal end of the vascular stent 2 and put it in a restrained state so as to deliver the vascular stent 2 into the blood vessel and relatively fix the position of the vascular stent 2 to align the position of the window 22 and the branch blood vessel, providing a basis for accurately establishing a branch channel.

[0111] For example, the guide wire 131 is pulled to release part of the stent 2, so that part of the stent 2 is attached to the inner wall of the blood vessel, and the fenestration 22 is unfolded and aligned with the branch blood vessel. Then, the deformable portion 121 is extended from the fenestration 22. Then, the release guide wire 161 is separated from the anchor ring 23, the proximal end of the stent 2 is released, and the stent 2 is completely attached to the inner wall of the blood vessel.

[0112] Please refer to Figure 1-Figure 9 In one embodiment, the release assembly 16 includes a plurality of release guidewires 161, and the distal end of each of the release guidewires 161 is used to penetrate at least one anchoring ring 23 of the vascular stent 2, so that the vascular stent 2 is in the restrained state.

[0113] The release guide wire 161 passes through the small cavity hole of the support rod 15. At least one anchoring ring 23 is provided at the proximal end of the vascular stent 2. For example, one release guide wire 161 is provided with one anchoring ring 23. For another example, one release guide wire 161 is provided with multiple anchoring rings 23. The number of release guide wires 161 is 2-5. The number of anchoring rings 23 is 2-6.

[0114] By using the release guide wire 161 to pass through the anchor ring 23, the vascular stent 2 is compressed and bound in the circumferential direction to reduce the volume of the vascular stent 2, so as to facilitate the delivery of the vascular stent 2 into the blood vessel. When the vascular stent 2 needs to be unfolded and attached to the blood vessel wall, the release guide wire 161 can be pulled out from the anchor ring 23 to unfold the vascular stent 2 and attach it to the blood vessel wall.

[0115] For example, the distal end of the vascular stent 2 is compressed and bound in the circumferential direction by using the guide wire 131; the proximal end of the vascular stent 2 is compressed and bound in the circumferential direction by using the release guide wire 161. The two cooperate with each other, and one of the guide wire 131 and the release guide wire 161 can be pulled first to put the vascular stent 2 in a semi-released state, which can not only stably adhere part of the vascular stent 2 to the vessel wall, but also facilitate the alignment of the window 22 and the branch vessel, thereby improving the accuracy of establishing the branch channel; subsequently, the other of the guide wire 131 and the release guide wire 161 is pulled to put the vascular stent 2 in a fully released state, and the entire vascular stent 2 is stably adhered to the vessel wall to achieve the establishment of the main channel.

[0116] Optionally, the catheter assembly 14 also includes a guide head 143 and a first fixing member 144, the first fixing member 144 and the guide head 143 are sequentially arranged at the distal end of the second guide tube 142, the first fixing member 144 has a plurality of fixing holes, and the fixing holes are used to accommodate the distal end of the release guide wire 161 to fix the vascular stent 2.

[0117] The catheter assembly 14 comprises a guide head 143, a first fixing member 144, and a second guide tube 142. The guide head 143 and the first fixing member 144 are provided with small holes for the insertion of a release guide wire 161. The release guide wire 161 is arranged on the peripheral side of the second guide tube 142.

[0118] It should be noted that, in the initial state, the first guide tube 141 is in contact with the guide head 143, so that the vascular stent 2 after the bundle diameter is completely disposed in the first guide tube 141, so as to facilitate the delivery of the vascular stent 2 into the blood vessel.

[0119] For example, the release guide wire 161 may be composed of three nickel-titanium wires, which are evenly distributed on the outer periphery of the second guide tube 142 in the circumferential direction, and the distal ends (front ends) thereof are detachably inserted into the corresponding three fixing holes of the guide head 143, and pass through the anchoring ring 23 at the proximal end of the vascular stent 2, thereby compressing and restraining the proximal end of the vascular stent 2 in the circumferential direction. The post-release operation process is to pull the three release guide wires 161 toward the proximal end through the handle, and the three release guide wires 161 are withdrawn from the anchoring ring 23. Due to the loss of the restraining force, the vascular stent 2 expands radially under its own elasticity, thereby sticking to the inner wall of the blood vessel.

[0120] Please refer to Figure 1-Figure 10 , Fig.10 A partial cross-sectional view of a delivery system provided in one embodiment of the present application Figure 1 In one embodiment, the release assembly 16 further includes a control member 162 , the release guide wire 161 is connected to the control member 162 , and the control member 162 can move along the axial direction of the handle body 11 so that the release guide wire 161 is disposed outside the anchor ring 23 .

[0121] The handle body 11 includes a first shell 111, and the control member 162 is sleeved on the first shell 111 and can move along the axial direction of the first shell 111. The distal end of the release guide wire 161 is directly or indirectly connected to the control member 162. When the control member 162 moves along the axial direction of the handle body 11, the release guide wire 161 can also move along the axial direction of the handle body 11. When the control member 162 moves in a direction away from the vascular stent 2, the release guide wire 161 also moves in a direction away from the vascular stent 2, so that the release guide wire 161 is pulled out from the anchor ring 23.

[0122] Please refer to Figure 1-Figure 10 In one embodiment, the release guide wire 161 is passed through the handle body 11, and the control member 162 is sleeved on the handle body 11. The inner circumference of the control member 162 is provided with a first limiting portion, and the outer circumference of the handle body 11 is provided with a second limiting portion. When the first limiting portion is engaged with the second limiting portion, the control member 162 is in a fixed state. When the first limiting portion is rotated to be separated from the second limiting portion, the control member 162 is in a movable state, so that the control member 162 moves relative to the handle body 11.

[0123] One of the first limiting portion and the second limiting portion is a clamping groove, and the other of the first limiting portion and the second limiting portion is a clamping block.

[0124] For example, the inner side wall of the control member 162 has a block, and the outer peripheral side of the first shell 111 of the handle body 11 is provided with a slot, and the block can cooperate with the slot. When the block is in the slot, the control member 162 cannot slide along the axial direction of the handle body 11. The slot is arranged along the circumference of the handle body 11. By first rotating the handle body 11 along the circumference of a preset angle, for example, the preset angle is 90°, so that the block on the control member 162 is rotated out of the slot, the control member 162 can move along the axial direction of the handle body 11.

[0125] Please refer to Figure 1-Figure 10 In one embodiment, the release assembly 16 also includes a fixing portion 163, the fixing portion 163 includes a base 1631, and a slider 1632 protruding from the base 1631, the base 1631 is disposed in the handle body 11, and is used to connect the release guide wire 161, and the peripheral side of the handle body 11 has a first sliding hole arranged along the axial direction of the handle body 11, and the slider 1632 is disposed in the first sliding hole and connected to the control member 162.

[0126] The proximal end of the release guide wire 161 is fixedly connected to the fixing portion 163. The fixing portion 163 is connected to the control member 162, that is, the axial movement of the control member 162 along the handle body 11 can drive the fixing portion 163 to move axially along the handle body 11, thereby driving the release guide wire 161 to move axially along the handle body 11.

[0127] The first shell 111 is formed by enclosing two semi-annular tubular structures. After the two semi-annular tubular structures are assembled, a slideway, i.e., a first sliding hole, will be formed in the middle. The first shell 111 of the handle body 11 has a first sliding hole on its circumferential side, and at least part of the slider 1632 is disposed in the first sliding hole. Since the first sliding hole is disposed axially along the handle body 11, the sliding direction of the fixing portion 163 is limited, so that the fixing portion 163 can only slide axially along the handle body 11 to drive the release guide wire 161 to move axially along the handle body 11.

[0128] The operation of extracting the release guide wire 161 is as follows: first, the control member 162 is rotated to rotate the first limit portion to separate from the second limit portion, and the control member 162 is in a movable state. Then, the control member 162 is moved in a direction away from the vascular stent 2, that is, the control member 162 is pulled back, and the control member 162 slides along the first shell 111, thereby driving the fixing portion 163 to move in a direction away from the vascular stent 2, that is, the fixing portion 163 moves backward, and then drives the release guide wire 161 to move in a direction away from the vascular stent 2, that is, the release guide wire 161 moves backward, so as to release the vascular stent 2.

[0129] It should be noted that if the bundle diameter guide wire 131 is pulled first and then the release guide wire 161 is withdrawn, the process of withdrawing the release guide wire 161 can also be understood as the post-release of the vascular stent 2 .

[0130] Please refer to Figure 1-Figure 11 , Fig.11 A schematic diagram of the local structure of a conveying system provided in one embodiment of the present application Figure 3 In one embodiment, the handle body 11 includes a first portion 113 and a second portion 114 connected to each other, the first portion 113 is closer to the distal end of the deformable portion 121 than the second portion 114, the beam diameter adjustment component 13 and the branch channel establishment component 12 are respectively disposed on opposite sides of the first portion 113, and the release component 16 is disposed on the second portion 114.

[0131] The beam diameter adjusting component 13 is symmetrically arranged with the branch channel establishing component 12. The releasing component 16 is farther away from the blood vessel stent 2 than the beam diameter adjusting component 13 and the branch channel establishing component 12.

[0132] First, the beam diameter adjustment component 13 and the branch channel establishment component 12 are controlled to extend the deformable portion 121 from the window 22, and then the release component 16 is controlled to withdraw the release guide wire 161, so that the vascular stent 2 is deployed and the branch channel and the main channel are accurately established. This embodiment reduces the difficulty of operating the delivery system 1 and improves the efficiency of establishing the branch channel by adjusting the positional relationship of the beam diameter adjustment component 13, the branch channel establishment component 12, and the release component 16, and combining the sequential steps of the medical operation.

[0133] Please refer to Figure 1-Figure 7In one embodiment, the delivery system 1 also includes a catheter assembly 14 disposed on the handle body 11, the catheter assembly 14 includes a first guide tube 141 and a second guide tube 142, the vascular stent 2 is inserted into the distal end of the first guide tube 141 and is sleeved on the distal outer peripheral side of the second guide tube 142, the first guide tube 141 can move relative to the second guide tube 142 along the axial direction of the handle body 11 to expose the vascular stent 2.

[0134] The first guide tube 141 is a sheath tube. Optionally, the first guide tube 141 has a pre-bending state, and the first guide tube 141 in the pre-bending state has a pre-bending angle. The range of the pre-bending angle is 0°-40°. The pre-bending angle is the initial pre-bending angle of the first guide tube 141, and on the premise of the initial pre-bending angle, it is also configured to further adjust the bending angle of the first guide tube 141. The adjustable angle range increases the range of the adjustable range by 40° (the direction of increasing the angle) on the basis of the initial angle.

[0135] When a vascular stent 2 needs to be installed in a curved blood vessel, such as the aortic arch, after the initial pre-bend angle is set, the first guide tube 141 can adaptively adjust the posture of the first guide tube 141 to match the curvature direction of the blood vessel by relying on its own elasticity and the supporting force of the blood vessel wall. For example, the blood vessel is curved to the left, and the first guide tube 141 itself is curved. When the first guide tube 141 enters the blood vessel, in theory, the bending direction of the first guide tube 141 may be forward, backward, left, or right. However, the first guide tube 141 adjusts its bending direction to the left curvature consistent with the blood vessel by relying on the supporting force of the blood vessel wall. Secondly, increasing the adjustable curvature can match the different curvatures of the aortic arch of different people.

[0136] At least a portion of the deformable portion 121 is disposed in the first guide tube 141 and is movable relative to the first guide tube 141. Furthermore, when the first guide tube 141 is bent, the deformable portion 121 is also bent accordingly.

[0137] The catheter assembly 14 includes a guide head 143, a first fixing member 144, and a second guide tube 142. The distal end of the second guide tube 142 is fixed to the first fixing member 144 and the guide head 143. The guide head 143 and the first fixing member 144 are provided with through holes for accommodating the release guide wire 161 to fix the release guide wire 161. The second guide tube 142 is penetrated by a fixing portion 163 and is slidably connected to the fixing portion 163. The proximal end of the second guide tube 142 is fixedly connected to the first shell 111. The material of the second guide tube 142 is mostly polymer materials (peek, pi, etc.) and stainless steel tubes. The stainless steel tubes are generally thin-walled capillaries, and can also be made into a sea wave tube shape for flexibility.

[0138] Please refer to Figure 1-Figure 13 , Fig.12 A local structural explosion of a conveying system provided in one embodiment of the present application Figure 2 . Fig.13 A partial cross-sectional view of a delivery system provided in one embodiment of the present application Figure 2 In one embodiment, the catheter assembly 14 further includes a bending adjusting piece 1451 and a bending adjusting wire 1452, wherein the bending adjusting piece 1451 is sleeved on the first guide tube 141, one end of the bending adjusting wire 1452 is fixed to the first guide tube 141, and the other end of the bending adjusting wire 1452 is passed through the bending adjusting piece 1451; the bending adjusting piece 1451 can slide relative to the first guide tube 141 to pull the bending adjusting wire 1452 so that the distal end of the first guide tube 141 is in a bent state.

[0139] The bending adjusting piece 1451 cooperates with the bending adjusting wire 1452 to make part of the first guide tube 141 in a bent state. Optionally, the bending adjusting wire 1452 passes through the bending adjusting piece 1451 and is fixed on the guide wire pressing block, and is fixed by steel sleeve riveting. The guide wire pressing block is sleeved on the first guide tube 141 and is fixedly connected to the first guide tube 141. The bending adjusting piece 1451 is inserted from the distal end of the first guide tube 141 and slidably placed in front of the guide wire pressing block.

[0140] Optionally, the handle body 11 also includes a second shell 112, the catheter assembly 14 includes a first rotating member 1454, the first guide tube 141 and the second guide tube 142 are inserted into the second shell 112, the first rotating member 1454 is sleeved in the second shell 112, the bending adjusting member 1451 includes a main body and a connecting portion protruding from the main body, the main body is slidably connected to the first guide tube 141, the main body is arranged in the second shell 112, and the peripheral side of the second shell 112 has a second sliding hole arranged along the axial direction of the first guide tube 141, the connecting portion is arranged in the second sliding hole and is rotatably connected to the first rotating member 1454, the first rotating member 1454 can rotate relative to the second shell 112, so that the bending adjusting member 1451 slides relative to the first guide tube 141.

[0141] The second housing 112 is formed by enclosing two semi-annular tubular structures. After the two semi-annular tubular structures are assembled, a slideway, i.e., a second sliding hole, is formed in the middle. The portion of the bending adjusting member 1451 having threaded teeth can extend out from the slideway, i.e., the connecting portion can be arranged in the second sliding hole and rotatably connected to the first rotating member 1454. The second sliding hole is arranged along the axial direction of the handle body 11. In this way, the bending adjusting member 1451 can only move along the axial direction of the handle body 11, but cannot rotate relative to the handle body 11.

[0142] Optionally, the catheter assembly 14 also includes two bending adjustment inner teeth 1453, which are assembled and combined on the second shell 112, so that the bending adjustment inner teeth 1453 are threadedly matched with the bending adjustment piece 1451, so that the rotation of the bending adjustment inner teeth 1453 can drive the bending adjustment piece 1451 to slide along the slide.

[0143] Then slide the first rotating member 1454 from the far end of the second shell 112 and put it on the bending adjustment member 1451 to complete the assembly. The inner wall of the first rotating member 1454 has a strip-shaped protrusion, and the outside of the bending adjustment inner tooth 1453 has a sliding groove along the axial direction of the handle body 11, so that the protrusion on the first rotating member 1454 is embedded in the sliding groove outside the bending adjustment inner tooth 1453, so that rotating the first rotating member 1454 can drive the bending adjustment inner tooth 1453 to rotate.

[0144] Further optionally, the inner teeth 1453 can only rotate on the outer periphery of the second shell 112 but cannot slide along the axial direction of the second shell 112 .

[0145] The operation of bending the first guide tube 141 is: rotate the first rotating member 1454 to drive the bending adjustment inner tooth 1453 threadedly connected to the first rotating member 1454 to rotate, and then the bending adjustment inner tooth 1453 drives the bending adjustment member 1451 threadedly connected thereto to move along the axial direction of the handle body 11, thereby driving the bending adjustment wire 1452 connected to the bending adjustment member 1451 to move along the axial direction of the handle body 11, thereby making the distal end of the first guide tube 141 in a bent state.

[0146] Please refer to Figure 1-Figure 13 In one embodiment, the catheter assembly 14 also includes a second rotating member 1461 and a second fixing member 1462, the second rotating member 1461 is sleeved on the second fixing member 1462, the second fixing member 1462 is connected to the first guide tube 141 and sleeved on the second guide tube 142; the second rotating member 1461 can rotate relative to the second guide tube 142 to drive the second fixing member 1462 and the first guide tube 141 to slide relative to the second guide tube 142.

[0147] Optionally, the catheter assembly 14 also includes a latching piece 1463 arranged on the outer peripheral side of the second shell body 112, the first guide tube 141 and the second guide tube 142 are inserted into the second shell body 112, and the second rotating member 1461 is sleeved on the second shell body 112. When the latching piece 1463 is engaged with the second rotating member 1461, the second rotating member 1461 is in a fixed state, and when the latching piece 1463 moves relative to the second shell body 112 to separate from the second rotating member 1461, the second rotating member is in a slidable state, so that the second rotating member and the second fixed member 1462 slide relative to the second guide tube 142.

[0148] The fixed handle is connected to the second housing 112 by means of a buckle, the fixed handle cover and the sheath tube sheath are connected to the fixed handle by screwing, the fixed structure and the buckle 1463 are first fixed by screws and then fixed to the second housing 112 by means of a buckle connection with the other half of the fixed structure, the rotating handle cover and the handle are connected by screws and buckles to assemble the sheath tube tooth block together to form a connection, and thus, the assembly of the front part of the handle body 11 is completed. The design principle of bending the first guide tube 141 and adjusting the first guide tube 141 to move forward or backward is that the screwing of the screw teeth converts the circumferential motion into linear motion.

[0149] In this embodiment, the second rotating member 1461 rotates circumferentially relative to the second guide tube 142, and then converts it into a form in which the second fixing member 1462 drives the second guide tube 142 to slide axially along the handle body 11, thereby adjusting the position of the first guide tube 141 relative to the second guide tube 142. By moving the first guide tube 141 toward the proximal end of the handle body 11, the distal end of the second guide tube 142 is exposed, thereby exposing the vascular stent 2, providing a basis for the subsequent establishment of a branch channel.

[0150] After the front part of the handle body 11 is completed, the support ring is inserted into the proximal end of the second shell 112, and then the support rod 15 is inserted from the proximal end of the catheter assembly 14. The shell rotating cylinder fixes the proximal end of the second shell 112 through a thread, and the first connecting tube 122 and the second connecting tube 132 on the left and right sides are fixed to the tail end fixing piece with glue in advance, and then the other half of the tail end fixing piece and the second shell 112 are combined and buckled. At this time, the release guide wire 161, the embedded catheter 1212, and the bundle diameter guide wire 131 have all been inserted from the sealing end cover on the push rod fixing piece, and then the control piece 162 is buckled with the fixing piece and the first shell 111. The locking structure of the catheter assembly 14 is first aligned and embedded with the card groove of the first shell 111, and then the inner second guide tube 142 in the catheter assembly 14 is passed through the center hole of the locking structure of the catheter assembly 14, the tail slide cover and the locking nut of the catheter assembly 14 are screwed with the front structure thread, and the Luer is adhered to the proximal end of the catheter assembly 14 by glue.

[0151] Please refer to Figure 1-Figure 13 The present application also provides a medical device, which includes a vascular stent 2 and a delivery system 1 as provided above in the present application.

[0152] The medical device provided in this embodiment adopts the delivery system 1 provided in the above application, and makes the branch channel establishing component 12 cooperate with the beam diameter adjusting component 13. When the vascular stent 2 is in the fourth state, the deformable portion 121 in the second state extends out from the window 22 to accurately establish a branch channel, thereby improving the accuracy of the branch channel and improving the treatment effect.

[0153] The vascular stent 2 is a coated vascular stent 2 with embedded branches, and the vascular stent 2 is composed of an anchoring ring 23, a fenestration 22, an embedded branch, and a wire-binding ring 24. Similarly, the vascular stent 2 can have multiple fenestrations 22 and multiple groups of wire-binding rings 24. The anchoring ring 23 is used in the post-release process.

[0154] Please refer to Figure 1-Figure 15 , Fig.14 A schematic diagram of the structure of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 2 . Fig.15 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 1 In one embodiment, the vascular stent 2 includes a stent body 21 and a plurality of wire binding rings 24 arranged around the stent body 21, and the bundle diameter adjustment component 13 includes a bundle diameter guide wire 131, and the bundle diameter guide wire 131 is passed through the plurality of wire binding rings 24 to put the vascular stent 2 in the third state.

[0155] The wire-binding ring 24 includes a fixed portion 241 for fixing to the stent body 21, and a ring portion 242 for being penetrated by the guide wire 131. When the vascular stent 2 is in the third state, the guide wire 131 extends around the outer circumference of the stent body 21 and compresses the vascular stent 2 in the radial direction of the vascular stent 2, and the ring portion 242 of the wire-binding ring 24 at least partially overlaps the vascular stent 2 in the axial direction and is penetrated by the guide wire 131, so that the wire-binding ring 24 maintains the state of compressing the vascular stent 2.

[0156] The vascular stent 2 in this embodiment includes a stent body 21 and a wire binding ring 24. The wire binding ring 24 is arranged on the outer peripheral side and / or the inner peripheral side of the stent body 21. The wire binding ring 24 includes a solid portion 241 and a ring portion 242. When the wire binding ring 24 is passed through the wire binding ring 24, the wire binding ring 24 abuts against the ring portion 242. For example, a wire binding ring 24 is passed through a plurality of wire binding rings 24. The number of wire binding rings 24 is 2-10. Optionally, the wire binding rings 24 are arranged at intervals along the axial direction of the stent body 21. Optionally, the wire binding rings 24 are arranged at intervals along the circumferential direction of the stent body 21.

[0157] The guide wire 131 passes through the wire ring 24 to compress the stent 2 in the radial direction of the stent 2 so as to facilitate the stent 2 to enter the blood vessel. Fig.15 As shown, after the bundle guide wire 131 is pulled out from the wire binding ring 24, at least a portion of the vascular stent 2 is deployed in the radial direction of the vascular stent 2, providing a basis for accurately establishing a branch channel.

[0158] The following is an introduction to the cooperation between the wire guide wire 131 and the wire binding ring 24.

[0159] Please refer to Figure 1-Figure 16 , Fig.16 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 2 In one embodiment, the wire binding ring 24 is disposed on the outer periphery of the stent body 21, the number of the wire binding ring 24 is at least one, and the wire binding ring 24 includes a binding end 243 away from the fixed portion 241. When the vascular stent 2 is in the third state, the wire binding ring 24 extends more than a full circle around the outer periphery of the stent body 21, and the area of ​​the ring portion 242 close to the fixed portion 241 and the area of ​​the ring portion 242 close to the binding end 243 overlap in the axial direction and are passed through by the binding guide wire 131.

[0160] The fixed portion 241 of the wire binding ring 24 is fixed to the outer peripheral side wall of the stent body 21. For example, the area close to the midpoint of the ring portion 242 is the binding end 243, and the opposite two sides of the ring portion 242 are connected to the fixed portion 241.

[0161] The wire binding ring 24 is extended more than one circle along the axis of the stent body 21, so that the area of ​​the ring portion 242 close to the fixed portion 241 and the area of ​​the ring portion 242 close to the binding end 243 overlap, and the binding diameter guide wire 131 passes through the area of ​​the ring portion 242 close to the fixed portion 241 and the area of ​​the ring portion 242 close to the binding end 243, thereby compressing the vascular stent 2 in the radial direction of the vascular stent 2.

[0162] Please refer to Figure 1-Figure 17 , Fig.17 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 3 In one embodiment, the wire binding ring 24 is disposed on the periphery of the stent body 21, the number of the wire binding rings 24 is at least two, and the wire binding ring 24 includes a binding end 243 away from the fixed portion 241. When the vascular stent 2 is in the third state, the two wire binding rings 24 extend around the periphery of the stent body 21 in opposite directions, and the regions of the ring portions 242 of the two wire binding rings 24 close to the respective binding ends 243 overlap in the axial direction and are passed through by the binding guide wire 131.

[0163] The fixed portion 241 of the wire binding ring 24 is fixed to the outer peripheral side wall of the stent body 21. For example, the area near the midpoint of the ring portion 242 is the binding end 243, and the opposite sides of the ring portion 242 are connected to the fixed portion 241. The binding end 243 is used to cooperate with and abut against the binding guide wire 131.

[0164] like Fig.17As shown, one wire binding ring 24 extends around the outer circumference of the stent body 21 in a clockwise direction, and the other extends around the outer circumference of the stent body 21 in a counterclockwise direction. The ring portions 242 of the two wire binding rings 24 overlap in areas close to the binding end 243, and the binding diameter guide wire 131 passes through the area of ​​the ring portion 242 of one wire binding ring 24 close to the binding end 243 and the area of ​​the ring portion 242 of the other wire binding ring 24 close to the binding end 243, thereby compressing the blood vessel stent 2 in the radial direction of the blood vessel stent 2.

[0165] Please refer to Figure 1-Figure 19 , Fig.18 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 4 . Fig.19 A cross-sectional view of a vascular stent provided in an embodiment of the present application provided in a delivery system Figure 5 In one embodiment, the wire binding ring 24 is disposed in the inner cavity of the stent body 21, the number of the wire binding rings 24 is at least two, and the wire binding ring 24 includes two oppositely disposed fixed portions 241 and a binding end 243 disposed between the two fixed portions 241. When the vascular stent 2 is in the third state, the regions of the ring portions 242 of the two wire binding rings 24 close to the respective binding ends 243 overlap on the central axis of the stent body 21 and are passed through by the binding guide wire 131.

[0166] like Fig.18 As shown, the fixed portion 241 of the wire binding ring 24 is fixed to the inner peripheral side wall of the stent body 21. For example, the area near the midpoint of the ring portion 242 is the binding end 243, and the opposite sides of the ring portion 242 are connected to the fixed portion 241.

[0167] like Fig.19 As shown, the areas of the ring portions 242 of at least two wire binding rings 24 close to their respective binding ends 243 extend toward the central axis direction of the stent body 21 and overlap, and the binding guide wire 131 is arranged close to the central axis of the stent body 21 and passes through the areas of the ring portions 242 of each wire binding ring 24 close to their respective binding ends 243, thereby compressing the vascular stent 2 in the radial direction.

[0168] The operation of the delivery system 1 and the medical device is introduced below. For example, during surgery, the delivery sheath 107 enters the aortic arch through the femoral artery.

[0169] The first step is to adjust the bend of the distal end of the first guide tube 141: firstly adjust the bend by the first rotating member 1454, and then reset the first rotating member 1454 after the first guide tube 141 reaches the designated position.

[0170] Steps for retracting the first guide tube 141 toward the proximal end: at this time, the second rotating member 1461 is rotated, and the threaded cooperation between the second rotating member 1461 and the sheath tooth block is used to move the sheath tooth block axially, and the distal end of the first guide tube 141 is slowly retracted a portion until the vascular stent 2 located in the first guide tube 141 is exposed from the distal end of the first guide tube 141, and the window 22 of the vascular stent 2 is exposed from the distal end of the first guide tube 141.

[0171] Step 2: When the window 22 does not match the opening position of the branch blood vessel, that is, the window 22 is not aligned with the opening of the quasi-branch blood vessel, the handle body 11 can be fine-tuned forward and backward as a whole until it is moved to a suitable position, until the window 22 is aligned with the opening of the branch blood vessel, and then the next step of operation is performed.

[0172] Step 3. After the position is adjusted, the locking seat 134 on the tail of the handle body 11 is threadedly separated from the second connecting tube 132, unlocked, and then the pull ring 133 is pulled to withdraw the guide wire 131 and disengage it from the wire binding ring 24 of the vascular stent 2, thereby loosening the wire binding ring 24 of the vascular stent 2. At this time, the bundle diameter of the vascular stent 2 is opened, and the vascular stent 2 expands under the action of its own elastic expansion force and adheres to the blood vessel wall.

[0173] In the fourth step, use your thumb to press the latch 1463 to unlock the connection between the second rotating member 1461 and the handle body 11, and then quickly withdraw the second rotating member 1461 toward the proximal end of the conveying system 1, that is, withdraw the first guide tube 141 until the distal end of the vascular stent 2 is completely released.

[0174] Step 5: If a branch blood vessel channel needs to be established, the catheter seat 123 on the tail of the handle body 11 is threadedly separated from the first connecting tube 122, unlocked, and then the embedded guide wire 1211 is withdrawn a certain distance, and the pre-molded embedded catheter 1212 restores the pre-bend angle.

[0175] Step 6. Slowly rotate the catheter seat 123, and with the assistance of medical imaging equipment, continuously adjust the posture of the embedded catheter 1212 until the elbow of the embedded catheter 1212 extends out of the window 22 and enters the opening of the branch blood vessel, because the head end of the embedded catheter 1212 is pre-bent, the pre-bent design helps to super-select the opening of the branch blood vessel.

[0176] Step 7: Push the pre-buried guide wire 1211 forward along the pre-buried catheter 1212 into the branch blood vessel. Insert another medical device (capture device) from the human brachial artery and dock with the pre-buried guide wire 1211, and then, with the assistance of the pre-buried catheter 1212 and the capture device, pass (pull) the pre-buried guide wire 1211 out of the human brachial artery.

[0177] Step 8: The proximal end of the vascular stent 2 can be released afterward. Hold the rear control member 162 with your thumb and rotate it 90° counterclockwise (after unlocking it, the rear control member 162 can slide along the first shell 111), then pull it backwards to complete the release. At this time, the three release guide wires 161 are pulled out from the anchor ring 23, and the proximal end of the vascular stent 2 expands radially to achieve the release of the vascular stent 2. At this point, the channel of the branch blood vessel is established and the release of the main stent is completed.

[0178] Step 9: withdraw the delivery system 1 from the body. It should be noted that while the delivery system 1 is withdrawn, the pre-buried guide wire 1211 needs to remain in the body to facilitate the implantation of the branch stent, thereby realizing the reconstruction of the three-branch blood vessels of the aortic arch by the modular stent. At the same time, the pre-buried catheter 1212 and the pre-buried guide wire 1211 are designed to super-select the embedded branches of the vascular stent 2 and the opening of the branch blood vessels, which greatly saves the time of the operation and improves the fault tolerance rate when reconstructing the branch blood vessels, thereby improving the operability and safety of the operation.

[0179] Therefore, before the bundle diameter guide wire 131 of the vascular stent 2 is withdrawn, the vascular stent 2 can be moved back and forth in the blood vessel through the delivery system 1 to fine-tune the window 22 of the vascular stent 2 and the branch vessel opening to achieve precise positioning. For example, the window 22 of the vascular stent 2 is fine-tuned to align with the branch vessel opening of the left subclavian artery to achieve precise positioning.

[0180] Then, the bundle diameter guide wire 131 is withdrawn to make part of the vascular stent 2 adhere to the vascular wall to achieve preliminary fixation. Subsequently, the pre-buried guide wire and pre-buried catheter are controlled to extend from the window to accurately establish a branch channel to improve the accuracy of the branch channel and improve the treatment effect. After that, the release guide wire 161 is withdrawn to make the vascular stent 2 completely adhere to the vascular wall to achieve the release of the main stent.

[0181] The above is a detailed introduction to the contents provided in the implementation mode of the present application. This article explains and illustrates the principles and implementation modes of the present application. The above explanation is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation mode and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A conveying system, characterized in that: The delivery system comprises: handle body; a branch channel establishing component, disposed on the handle body, the branch channel establishing component comprising a deformable portion, the deformable portion having a first state and a second state, the bending degree of the deformable portion in the second state being greater than the bending degree of the deformable portion in the first state; and a beam diameter adjustment component, arranged on the handle body, and used to adjust the blood vessel stent from a third state to a fourth state, wherein the compression degree of the blood vessel stent in the fourth state is less than the compression degree of the blood vessel stent in the third state; Wherein, the branch channel establishing component passes through the vascular stent, and when the vascular stent is in the third state, the branch channel establishing component is in the first state, and when the vascular stent is in the fourth state, the branch channel establishing component is in the second state; the deformable portion can move along the axial direction of the handle body so that the distal end of the deformable portion moves to the window of the vascular stent, and the deformable portion in the second state can extend from the window.

2. The conveying system according to claim 1, characterized in that The deformable portion includes a pre-buried guide wire, the distal end of which is used to extend from the window; wherein the pre-buried guide wire is in a bent state.

3. The conveying system according to claim 2, characterized in that The deformable portion also includes a pre-buried catheter sleeved on the outer peripheral side of the pre-buried guide wire, and the pre-buried catheter can move relative to the pre-buried guide wire to guide the pre-buried guide wire to extend from the window; wherein the distal end of the pre-buried catheter is in a bent state.

4. The conveying system according to claim 3, characterized in that The branch channel establishment component also includes a first connecting tube and a catheter seat, the first connecting tube is closer to the handle body than the catheter seat, the pre-buried guide wire is inserted into the first connecting tube and the catheter seat, the catheter seat is in a fixed state when threadedly connected to the first connecting tube, and is in an adjustable state when separated from the first connecting tube, so that the catheter seat can move in a direction away from or close to the first connecting tube, and can also rotate relative to the first connecting tube to allow the pre-buried guide wire to extend from the window.

5. The conveying system according to claim 4, characterized in that The pre-buried catheter is inserted into the first connecting tube and the catheter seat, and the catheter seat can also move the pre-buried guide wire and the pre-buried catheter to the window of the vascular stent.

6. The conveying system according to claim 1, characterized in that The beam diameter adjustment component includes a beam diameter guide wire, which is used to put the vascular stent in the third state. The beam diameter adjustment component can move axially along the handle body to pull the beam diameter guide wire to change the vascular stent from the third state to the fourth state.

7. The conveying system according to claim 6, characterized in that The beam diameter adjustment assembly also includes a second connecting tube and a pull ring. The second connecting tube is closer to the handle body than the pull ring. The beam diameter guide wire is passed through the second connecting tube and connected to the pull ring. The pull ring is in a fixed state when threadedly connected to the second connecting tube, and is in a pullable state when separated from the second connecting tube, so that the pull ring can move in a direction away from the second connecting tube to pull the beam diameter guide wire.

8. The conveying system according to claim 1, characterized in that The delivery system further comprises a release assembly disposed on the handle body, and the release assembly is used to put the vascular stent in a restrained state.

9. The conveying system according to claim 8, characterized in that The release assembly includes a plurality of release guidewires, and the distal end of each of the release guidewires is used to penetrate at least one anchoring ring of the vascular stent to put the vascular stent in the restrained state.

10. The conveying system according to claim 9, characterized in that The release assembly further comprises a control member, the release guide wire is connected to the control member, and the control member can move along the axial direction of the handle body so that the release guide wire is arranged outside the anchoring ring.

11. The delivery system according to claim 10, characterized in that The release guide wire is inserted into the handle body, and the control member is sleeved on the handle body. A first limiting portion is provided on the inner circumference of the control member, and a second limiting portion is provided on the outer circumference of the handle body. When the first limiting portion is engaged with the second limiting portion, the control member is in a fixed state. When the first limiting portion is rotated to be separated from the second limiting portion, the control member is in a movable state, so that the control member moves relative to the handle body.

12. The delivery system according to claim 11, characterized in that The release assembly also includes a fixing portion, which includes a base and a slider protruding from the base. The base is arranged in the handle body and is used to connect the release guide wire. The circumferential side of the handle body has a first sliding hole arranged along the axial direction of the handle body. The slider is arranged in the first sliding hole and connected to the control member.

13. The delivery system according to claim 8, characterized in that The handle body includes a first part and a second part that are connected. The first part is closer to the distal end of the deformable part than the second part. The beam diameter adjustment component and the branch channel establishment component are respectively arranged on opposite sides of the first part, and the release component is arranged in the second part.

14. The delivery system according to claim 1, characterized in that The delivery system also includes a catheter assembly arranged on the handle body, the catheter assembly includes a first guide tube and a second guide tube, the vascular stent is inserted into the distal end of the first guide tube and is sleeved on the distal outer peripheral side of the second guide tube, and the first guide tube can move relative to the second guide tube along the axial direction of the handle body to expose the vascular stent.

15. The delivery system according to claim 14, characterized in that The catheter assembly also includes a bending adjusting piece and a bending adjusting wire. The bending adjusting piece is sleeved on the first guide tube, one end of the bending adjusting wire is fixed to the first guide tube, and the other end of the bending adjusting wire is passed through the bending adjusting piece; the bending adjusting piece can slide relative to the first guide tube to pull the bending adjusting wire so that the distal end of the first guide tube is in a bent state.

16. The delivery system according to claim 14, characterized in that The catheter assembly also includes a second rotating member and a second fixed member, the second rotating member is sleeved on the second fixed member, the second fixed member is connected to the first guide tube and sleeved on the second guide tube; the second rotating member can rotate relative to the second guide tube to drive the second fixed member and the first guide tube to slide relative to the second guide tube.

17. A medical device, characterized in that: The medical device includes a vascular stent and a delivery system as described in any one of claims 1-16.

18. The medical device according to claim 17, characterized in that The vascular stent comprises a stent body and a plurality of wire binding rings arranged around the stent body, the diameter adjustment assembly comprises a diameter guide wire, and the diameter guide wire is passed through the plurality of wire binding rings so that the vascular stent is in the third state; Wherein, the wire binding ring comprises a fixed portion for fixing to the stent body, and a ring portion for being passed through by the binding wire; When the vascular stent is in the third state, the guide wire extends around the outer circumference of the stent body and compresses the vascular stent in the radial direction of the vascular stent, and the ring portion of the wire binding ring at least partially overlaps the vascular stent in the axial direction and is passed through by the guide wire, so that the wire binding ring maintains a state of compressing the vascular stent.

19. The medical device according to claim 18, characterized in that The wire binding ring is arranged on the outer periphery of the stent body, the number of the wire binding ring is at least one, and the wire binding ring includes a binding end away from the fixed part; When the vascular stent is in the third state, the bundle wire extends more than a full circle around the outer circumference of the stent body, and the area of ​​the ring portion close to the fixed portion and the area of ​​the ring portion close to the binding end overlap axially and are passed through by the bundle wire.

20. The medical device according to claim 18, characterized in that The wire binding ring is arranged on the outer periphery of the stent body, the number of the wire binding ring is at least two, and the wire binding ring includes a binding end away from the fixed part; When the vascular stent is in the third state, the two wire-binding rings extend in opposite directions around the outer circumference of the stent body, and the regions of the ring portions of the two wire-binding rings close to the respective binding ends overlap in the axial direction and are passed through by the binding guidewire.

21. The medical device according to claim 18, characterized in that The wire binding ring is arranged in the inner cavity of the stent body, the number of the wire binding ring is at least two, and the wire binding ring comprises two oppositely arranged fixed parts and a binding end arranged between the two fixed parts; When the vascular stent is in the third state, the regions of the ring portions of the two wire-binding rings close to the respective binding ends overlap on the central axis of the stent body and are passed through by the binding guide wire.

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