A vascular structure treatment assembly

Abstract

The application belongs to the technical field of interventional medical instruments, and particularly relates to a kind of vascular structure stenosis treatment assembly.The treatment assembly comprises a cutting stent, an in-vivo collection device, a balloon catheter and an extra-corporeal protection branch, the cutting stent and the in-vivo collection device are slidably arranged in the balloon catheter, and the cutting stent and the in-vivo collection device can be extended from the balloon catheter and released to an unfolded state; the cutting stent is located at the proximal end of the in-vivo collection device and at the distal end of atheromatous plaque or thrombus; the inlet of the extra-corporeal protection branch is in communication with the vascular structure, the outlet is in communication with a vein, and the communication position of the inlet and the vascular structure is located at the distal end of the in-vivo collection device.The application creates a suitable space through the balloon catheter, cuts atheromatous plaque or thrombus and other substances through the cutting stent, and collects the cut substances through the in-vivo collection device and the extra-corporeal protection branch, thus having the advantages of small trauma, fast recovery and obvious curative effect.

Description

Technical Field

[0001] This application belongs to the field of interventional medical device technology, specifically relating to a treatment component for vascular stenosis. Background Technology

[0002] In modern medicine, stenosis of vascular structures such as arteries and veins is a common vascular disease that seriously threatens human health. Taking the carotid artery as an example, as a vital channel supplying blood to the brain, stenosis of the carotid artery significantly affects blood supply to the brain, thereby increasing the risk of serious cerebrovascular events such as ischemic stroke and transient ischemic attack. Other vascular structures such as arteries and veins in other parts of the body also support various blood supply systems or organs; stenosis or occlusion inevitably leads to dysfunction or loss of function in these systems and organs.

[0003] Currently, treatment methods for stenosis of vascular structures such as arteries and veins mainly include stent placement and endarterectomy of these structures. Stent placement is a relatively minimally invasive interventional treatment. By implanting a stent into the narrowed area of ​​the artery or vein, the blood vessel is opened to restore normal blood flow. It has the advantages of being less invasive and having a relatively quick recovery. However, stent implantation also has some limitations, such as the risk of in-stent restenosis, which may require further intervention. In addition, the long-term effects of stents and the chronic irritation to the blood vessel wall require further attention.

[0004] Endarterectomy of vascular structures such as arteries and veins involves cutting open these structures to directly remove atherosclerotic plaques or thrombi from the vascular endothelium, thereby restoring the normal diameter and blood flow of the blood vessels. This method is clearly effective in relieving stenosis in vascular structures such as arteries and veins, and can achieve good treatment results in some severe cases suitable for surgery. However, this treatment method also has significant drawbacks. On the one hand, because it requires cutting open vascular structures such as arteries and veins, the surgery is relatively invasive, the postoperative recovery time is long, and complications such as incision infection and bleeding may occur, which can affect the patient's physical condition and postoperative quality of life.

[0005] On the other hand, and more importantly, if the detached atherosclerotic thrombus is not effectively intercepted and removed after endarterectomy, it can travel with the bloodstream to other blood vessels, causing other complications. Taking carotid artery stenosis as an example, if the detached atherosclerotic thrombus is not effectively intercepted and removed during carotid endarterectomy, it can easily travel with the bloodstream to the brain, forming a cerebral thrombosis and leading to serious complications such as cerebral infarction, posing a significant risk to the patient's life and disability. Although some measures have been taken clinically to prevent thrombus detachment, the effectiveness of these methods is still unsatisfactory and cannot completely prevent thrombi from entering cerebral blood vessels. In other areas, large artery stripping surgery may be difficult to directly access, and there is also the risk of plaque detachment exacerbating ischemia.

[0006] With the increasing aging of the population and the rising demands for a healthy quality of life, there is an urgent need for a safer and more effective method or technology to treat stenosis of vascular structures such as arteries and veins, in order to overcome the shortcomings of existing treatments, reduce the risk of surgical trauma and complications, and improve patients' treatment outcomes and quality of life. Utility Model Content

[0007] The purpose of this application is to provide a safe and effective treatment component for stenosis of vascular structures such as arteries and veins, in order to overcome the shortcomings of existing treatment methods, reduce the risk of surgical trauma and complications, and improve the treatment effect and quality of life of patients.

[0008] The embodiments of this application can be implemented through the following technical solutions:

[0009] A treatment component for vascular stenosis includes a cutting stent, an in vivo collection device, a balloon catheter, and an external protection branch. The cutting stent and the in vivo collection device are slidably disposed within the balloon catheter and can extend out of the balloon catheter and be released to an deployed state.

[0010] The cutting stent is located at the proximal end of the in vivo collection device and at the distal end of the atherosclerotic plaque or thrombus.

[0011] The inlet of the external protection branch is connected to a vascular structure, and the outlet is connected to a normal proximal large vein. The connection between the inlet and the vascular structure is located at the distal end of the in vivo collection device.

[0012] Preferably, the in vivo collection device is connected to the distal end of the cutting stent, and the in vivo collection device and the cutting stent move synchronously.

[0013] Preferably, when the in vivo collection device is in the unfolded state, it has a mesh structure and its outer diameter gradually increases in the direction away from the cutting support.

[0014] Preferably, the mesh of the in vivo collection device has a polygonal structure.

[0015] Furthermore, the inlet and outlet of the external protection branch are connected by a conduit, and a flow control device is provided on the conduit.

[0016] Preferably, a filter device is also provided between the flow control device and the outlet of the external protection branch.

[0017] Furthermore, the opening degree of the flow control device is determined based on the baseline value of cerebral blood flow.

[0018] Furthermore, the balloon catheter includes a first catheter, a second catheter, and a balloon. The balloon is connected to the distal end of the first catheter, and the second catheter is slidably inserted inside the first catheter. The cutting stent and the in vivo collection device are slidably inserted inside the second catheter.

[0019] Furthermore, when the cutting support is in the unfolded state, it is a mesh structure with polygonal mesh openings. Its proximal end is connected to the delivery guide wire through a first fixing structure, and its distal end is connected to the in vivo collection device through a second fixing structure.

[0020] The embodiments of this application provide a treatment component for vascular stenosis, which has at least the following beneficial effects:

[0021] This application creates a suitable space using a balloon catheter to cut atherosclerotic plaques or thrombi via a cutting stent, resulting in significant and effective treatment. Furthermore, the cut material is collected both internally and externally via a protective branch, reducing surgical trauma and the risk of complications. This application's vascular stenosis treatment component effectively removes and collects foreign bodies from arteries and veins through interventional procedures, offering advantages such as minimal trauma, rapid recovery, and significant therapeutic effects.

[0022] The peripheral curved surface of the in vivo collection device in this application forms a slope-like structure, with the slope facing proximally. This slope structure enables layered capture and collection of debris from various locations, and also allows the in vivo collection device to adapt to and fit snugly against vascular structures such as arteries and veins of different inner diameters. Regardless of the inner diameter of vascular structures such as arteries and veins, the in vivo collection device can fit tightly, reducing the possibility of debris escape due to insufficient fit. At the same time, the tight fit further ensures the effective collection and capture of debris, minimizing the probability of debris escape, thus providing a more reliable guarantee for the treatment of stenosis of vascular structures such as arteries and veins, and effectively reducing the occurrence of adverse events such as debris entering cerebral blood vessels.

[0023] The external protection branch in this application precisely regulates blood flow through a flow control device, allowing small particles to flow within the catheter at an appropriate velocity. Furthermore, a filtration device further enhances this effect, meticulously filtering the blood after it has passed through the flow control device and collecting any remaining small particles. This design effectively prevents small particles from flowing into the veins with the blood, thereby avoiding the formation of venous thrombosis. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the connection between the vascular stenosis treatment component and the relevant blood vessel in this application;

[0025] Figure 2 This is an overall structural diagram showing the connection between the delivery guide wire, cutting support, and in vivo collection device in this application.

[0026] Figure 3 This is an overall structural diagram of the balloon catheter in this application.

[0027] Reference numerals: 1. Cutting stent; 2. In vivo collection device; 3. Balloon catheter; 31. First catheter; 32. Second catheter; 33. Balloon; 4. External protection branch; 41. Flow control device; 42. Filter device; 5. First fixation structure; 6. Second fixation structure; 7. Guide wire delivery; A. Vascular structures such as arteries and veins; B. Large proximal vein. Detailed Implementation

[0028] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0029] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. Unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0030] Furthermore, in the description of the embodiments of this application, various components on the drawings have been enlarged or reduced for ease of understanding, but this is not intended to limit the scope of protection of this application.

[0031] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and specific embodiments. For ease of description, the terms "proximal" and "distal" are used in the following description, where "proximal" refers to the end closer to the operator, and "distal" refers to the end farther from the operator and deeper into vascular structures such as arteries and veins.

[0032] This application provides a treatment component for vascular stenosis. Figure 1 This paper illustrates a schematic diagram of the connection between the vascular stenosis treatment component (hereinafter referred to as the "treatment component") and the relevant blood vessel in this application. Figure 1 As shown, the treatment component includes a cutting stent 1, an in vivo collection device 2, a balloon catheter 3, and an external protection branch 4. The balloon catheter 3 delivers the in vivo collection device 2 and the cutting stent 1, dilating the narrowed blood vessel to create suitable space for subsequent placement of the in vivo collection device 2 and the cutting stent 1. The cutting stent 1 cuts atherosclerotic plaques or thrombi, reducing them to smaller, blood-flowable particles. The in vivo collection device 2 collects these particles. The external protection branch 4 further collects any particles not successfully captured by the in vivo collection device 2, further reducing the probability of these particles entering cerebral blood vessels. This application creates suitable space using the balloon catheter 3, cuts atherosclerotic plaques or thrombi using the cutting stent 1, achieving significant therapeutic effects. The dual collection of the cut material using the in vivo collection device 2 and the external protection branch 4 reduces the risk of surgical trauma and complications. This treatment component effectively removes and collects foreign bodies within vascular structures such as arteries and veins through interventional procedures, offering advantages such as minimal trauma, rapid recovery, and significant therapeutic effects.

[0033] The following section will detail the working relationship and structure of the cutting stent 1, the in vivo collection device 2, and the balloon catheter 3.

[0034] Specifically, the cutting stent 1 and the internal collection device 2 are slidably inserted into the balloon catheter 3. The cutting stent 1 and the internal collection device 2 can extend from the balloon catheter 3 and be released to the deployed state. That is, the cutting stent 1 and the internal collection device 2 have both a contracted state and a deployed state. When the cutting stent 1 and the internal collection device 2 are placed inside the balloon catheter 3, they are in the contracted state. When the cutting stent 1 and the internal collection device 2 move along their axial direction within the balloon catheter 3 and extend out of the balloon catheter 3, they can switch from the contracted state to the deployed state. Similarly, after the surgery is completed, the cutting stent 1 and the internal collection device 2 can move along their axial direction and be retracted into the balloon catheter 3, and they switch from the deployed state to the contracted state to facilitate withdrawal from the body along with the balloon catheter 3.

[0035] Furthermore, the balloon catheter 3 includes a first catheter 31, a second catheter 32, and a balloon 33. The balloon 33 is connected to the distal end of the first catheter 31 and is the key component for the balloon catheter 3 to achieve vasodilation. The outer wall of the first catheter 31 is provided with a first chamber communicating with the balloon 33. By operating the first chamber, the balloon 33 can be switched between inflated and deflated states. When it is necessary to dilate a narrowed blood vessel, a specific medium is delivered to the first chamber to inflate the balloon 33, thereby opening the blood vessel; when dilation is not needed, the balloon 33 can be deflated to facilitate operation and reduce the impact on the blood vessel.

[0036] In some specific embodiments of this application, such as Figure 1 and Figure 3 As shown, a three-way valve is provided on the proximal outer wall of the balloon catheter 3. The side branch of the three-way valve is connected to the first chamber. The operator can use a syringe to inject or withdraw air into the side branch of the three-way valve to switch the expansion and contraction states of the balloon 33.

[0037] Furthermore, the second catheter 32 is slidably inserted within the first catheter 31. Throughout the treatment process, the second catheter 32 serves as the delivery device, with the cutting stent 1 and the in vivo collection device 2 slidably inserted within it. By manipulating the second catheter 32, the cutting stent 1 and the in vivo collection device 2 can be accurately delivered to the target location within the blood vessel, and at the target location, the cutting stent 1 and the in vivo collection device 2 can be switched from a constricted state to an expanded state. This structural design allows the balloon catheter 3 to not only achieve vascular dilation but also provide a channel for the delivery of the cutting stent 1 and the in vivo collection device 2. The cooperation of all components improves the treatment's effectiveness and safety.

[0038] Thus, the operator can control the position of the in vivo collection device 2 and the cutting stent 1 relative to the balloon catheter 3 by delivering the guide wire 7, thereby realizing the switching of the state and adjustment of the position of the in vivo collection device 2 and the cutting stent 1.

[0039] It is conceivable that the cutting stent 1 and the in vivo collection device 2 could also switch between their contracted and deployed states through their respective separate operating devices, but this method suffers from structural complexity and cumbersome operation. In some preferred embodiments of this application, the cutting stent 1 and the in vivo collection device 2 are made of shape memory metal material, so that they can automatically switch from the contracted state to the deployed state when they extend from the balloon catheter 3.

[0040] Furthermore, such as Figure 1 As shown, the cutting stent 1 is located proximal to the in vivo collection device 2, and distal to the atherosclerotic plaque or thrombus. During the treatment procedure, the operator can use the guide wire 7 to repeatedly move the cutting stent 1 between the proximal and distal ends of the atherosclerotic plaque or thrombus. During this process, the cutting stent 1, through its structure and movement, effectively and thoroughly cuts the atherosclerotic plaque or thrombus, breaking it down into small particles. Simultaneously, due to the positional relationship between the in vivo collection device 2 and the cutting stent 1, the in vivo collection device 2 can promptly capture and collect the small particles generated after the cutting action, collecting most of the debris in situ.

[0041] In some preferred embodiments of this application, such as Figure 1 and Figure 2 As shown, the internal collection device 2 is connected to the distal end of the cutting stent 1, and the internal collection device 2 and the cutting stent 1 move synchronously. This connection method allows the internal collection device 2 to move synchronously with the cutting stent 1. During the actual treatment procedure, the cutting stent 1 cuts atherosclerotic plaques or thrombi into fragments. The internal collection device 2 moves synchronously with the cutting stent 1, tracking its position in real time. Compared to a fixed collection device, this dynamic internal collection device 2 can collect the fragments generated by the cutting stent 1 more promptly and efficiently. Because it can always maintain a close distance to the cutting site, it can collect the generated fragments in a timely manner, greatly improving the efficiency of fragment collection, thereby better ensuring the smooth progress of the treatment process and reducing the risks of fragments entering cerebral blood vessels.

[0042] In some specific embodiments of this application, such as Figure 1 and Figure 2 As shown, when the cutting stent 1 is in the deployed state, it has a mesh structure with polygonal openings to achieve effective and efficient cutting of substances such as atherosclerotic plaques or thrombi. Its proximal end is connected to the delivery guidewire 7 via the first fixing structure 5, and its distal end is connected to the in vivo collection device 2 via the second fixing structure 6. The cutting stent 1 achieves stable connection with the delivery guidewire 7 and the in vivo collection device 2 through the first fixing structure 5 and the second fixing structure 6, respectively.

[0043] In some preferred embodiments of this application, such as Figure 1 and Figure 2 As shown, when the in vivo collection device 2 is in the deployed state, it has a mesh structure, and its outer diameter gradually increases in the direction away from the cutting support 1. This structural design brings many advantages.

[0044] First, the outer peripheral curved surface of the in vivo collection device 2 forms a slope-like structure, with the slope facing proximally. This slope structure enables layered capture and collection of debris from various locations. During actual treatment, the fragments cut by the stent 1 from atherosclerotic plaques or thrombi disperse within the blood vessel. The slope-like structure of the in vivo collection device 2 can capture these fragments from different layers based on their location and trajectory, significantly improving the capture efficiency and collecting as many fragments as possible generated during the cutting process.

[0045] Secondly, this type of slope structure allows the in-body collection device 2 to adapt to, fit snugly against vascular structures A such as arteries and veins with different inner diameters. Since the inner diameter of vascular structures A varies among individuals, this characteristic of the in-body collection device 2 ensures the stability of its active connection with these structures. Regardless of the inner diameter of the vascular structure A, the in-body collection device 2 can fit snugly, reducing the possibility of debris escape due to insufficient fit. Simultaneously, the snug fit further ensures effective debris collection and capture, minimizing the probability of debris escape, thus providing a more reliable guarantee for the treatment of stenosis of vascular structures such as arteries and veins, and effectively reducing the occurrence of adverse events such as debris entering cerebral blood vessels.

[0046] In some preferred embodiments of this application, such as Figure 1 and Figure 2 As shown, when the in vivo collection device 2 is in the unfolded state, its inner and outer diameters are basically the same for a certain length near the distal end, so that the in vivo collection device 2 and the vascular structure are in surface contact. Compared with line contact, it has the advantages of stable dynamic connection and tight fit, and further reduces the possibility of debris escape due to poor fit.

[0047] In some preferred embodiments of this application, the mesh of the in vivo collection device 2 has a polygonal structure, including but not limited to triangular, quadrilateral, pentagonal, and hexagonal structures, to achieve effective capture of debris.

[0048] The structure of external protection branch 4 will be described in detail below.

[0049] Specifically, such as Figure 1As shown, the inlet of the external protection branch 4 is connected to vascular structures A such as arteries and veins, and the outlet is connected to a large proximal vein B. The connection point between its inlet and vascular structure A is located at the distal end of the in vivo collection device 2. This connection configuration establishes an external pathway from vascular structure A (arteries and veins) to the large proximal vein B.

[0050] During treatment, while the internal collection device 2 can collect most of the small particles generated by the cutting stent 1, some particles may still not be successfully captured. At this point, the external protection branch 4 plays a crucial role. Utilizing the inherent pressure difference between vascular structures A (such as arteries and veins) and the proximal large vein B, blood in the external protection branch 4 naturally flows from vascular structures A to the proximal large vein B, without the need for an external pump to pressurize the blood flow. This design allows small particles not captured by the internal collection device 2 to be further collected and captured along with the blood through the external protection branch 4, thereby reducing the risk of small particles entering cerebral blood vessels and improving the safety and effectiveness of the treatment. The external protection branch 4 and the internal collection device 2 work together to form a dual guarantee, minimizing the potential threat of small particles generated by the cutting to cerebral blood vessels and providing a more comprehensive solution for the treatment of carotid or vertebral artery stenosis.

[0051] Specifically, such as Figure 1 As shown, the inlet and outlet of the external protection branch 4 are interconnected by a catheter, which forms a dedicated channel for blood flow. The existence of this channel provides a specific transport path for small particles that are not successfully captured by the in vivo collection device 2, allowing them to be guided out of the body with the flow of blood.

[0052] Meanwhile, the catheter is equipped with a flow control device 41, which allows for precise control of blood flow within the catheter according to the actual treatment needs. During treatment, an appropriate blood flow helps to more effectively collect residual small particles, ensuring collection efficiency while avoiding potential adverse effects from excessive or insufficient flow. For example, excessive flow may cause additional pressure on the vessel wall, while insufficient flow may fail to collect small particles adequately. The presence of the flow control device 41 allows the external protection branch 4 to better adapt to the physiological conditions and treatment requirements of different patients, further improving the safety and effectiveness of the treatment and providing a more reliable guarantee for the treatment of stenosis in vascular structures such as arteries and veins.

[0053] In some specific embodiments of this application, the opening degree of the flow control device 41 is determined based on the baseline value of cerebral blood flow.

[0054] In some preferred embodiments of this application, such as Figure 1 A filter device 42 is also provided between the flow control device 41 and the outlet of the external protection branch 4 to better collect small particles and ensure the safety of treatment.

[0055] The external protection branch 4 is responsible for collecting small particles that the internal collection device 2 failed to capture. The flow control device 41 precisely regulates the blood flow, allowing the small particles to flow through the catheter at an appropriate velocity. Furthermore, the filtration device 42 further enhances this function, meticulously filtering the blood after passing through the flow control device 41 and re-collecting the small particles. This design effectively prevents small particles from flowing into the proximal large vein B, thus avoiding thrombus formation in the proximal large vein B. If small particles do flow into the proximal large vein B, they may accumulate within it, increasing the risk of thrombosis. The filtration device 42 ensures the safety of the venous system, providing stronger protection for the patient's recovery and further improving the effectiveness and safety of the entire vascular stenosis treatment component.

[0056] In some preferred embodiments of this application, the catheter of the external protection branch 4 is connected to the vascular structure A and the proximal large vein B through a Y-shaped puncture needle, which has the advantages of minimal trauma and convenient operation.

[0057] This vascular stenosis treatment component achieves precise removal and collection of intravascular foreign bodies through interventional procedures. The treatment process and mechanism are as follows: First, a balloon catheter 3 is used to deliver the in vivo collection device 2 and the cutting stent 1. The balloon 33 dilates the stenotic vessel, establishing an effective channel and creating placement space for subsequent operations. Then, a second catheter 32 extends distally, crossing the atherosclerotic plaque. The in vivo collection device 2 and the cutting stent 1 are then extended distally, and the second catheter 32 is withdrawn from the body. The in vivo collection device 2 and the cutting stent 1 automatically switch to an deployed state within vascular structures A such as arteries and veins. The cutting stent 1... The procedure involves mechanically cutting atherosclerotic plaques or thrombi, breaking down large pathological materials into tiny particles that can travel with the bloodstream. Simultaneously, the in-vivo collection device 2 captures and collects most of the debris in situ. To further ensure safety, an external protection pathway 4 acts as a dual-protection system, continuously filtering residual particles not captured by the in-vivo device, forming a comprehensive protection system from the inside of the blood vessel to the outside. After the procedure, the cutting stent 1 and the in-vivo collection device 2 are retrieved into the first catheter 31 via the guidewire 7, and the medium in the balloon 33 is aspirated until the balloon 33 is in a contracted state. The treatment components are then withdrawn from the body. This three-tiered synergistic mechanism (plaque cutting → dual collection → external filtration) not only significantly improves surgical debridement efficiency but also minimizes the risk of debris embolism through a layered protection design. It combines the clinical advantages of minimally invasive interventional therapy—small trauma and rapid recovery—with the dual action of mechanical removal and physical protection, ensuring both the efficacy and operational safety of treating vascular stenosis such as arteries and veins.

[0058] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A treatment component for vascular stenosis, characterized in that: It includes a cutting stent, an in vivo collection device, a balloon catheter, and an external protection branch. The cutting stent and the in vivo collection device are slidably inserted into the balloon catheter. The cutting stent and the in vivo collection device can extend out of the balloon catheter and be released to the deployed state. The cutting stent is located at the proximal end of the in vivo collection device and at the distal end of the atherosclerotic plaque or thrombus. The inlet of the external protection branch is connected to a vascular structure, and the outlet is connected to a normal proximal large vein. The connection between the inlet and the vascular structure is located at the distal end of the in vivo collection device.

2. The vascular stenosis treatment component according to claim 1, characterized in that: The in vivo collection device is connected to the distal end of the cutting support, and the in vivo collection device and the cutting support move synchronously.

3. The vascular stenosis treatment component according to claim 2, characterized in that: When the in vivo collection device is in the unfolded state, it has a mesh structure and its outer diameter gradually increases in the direction away from the cutting support.

4. The vascular stenosis treatment component according to claim 3, characterized in that: The mesh of the in-body collection device has a polygonal structure.

5. The vascular stenosis treatment component according to claim 1, characterized in that: The inlet and outlet of the external protection branch are connected by a conduit, and a flow control device is installed on the conduit.

6. The vascular stenosis treatment component according to claim 5, characterized in that: A filter device is also provided between the flow control device and the outlet of the external protection branch.

7. A treatment component for vascular stenosis according to claim 5, characterized in that: The opening degree of the flow control device is determined based on the baseline value of cerebral blood flow.

8. The vascular stenosis treatment component according to claim 1, characterized in that: The balloon catheter includes a first catheter, a second catheter, and a balloon. The balloon is connected to the distal end of the first catheter. The second catheter is slidably inserted inside the first catheter. The cutting stent and the in vivo collection device are slidably inserted inside the second catheter.

9. A treatment component for vascular stenosis according to claim 2, characterized in that: When the cutting support is in the unfolded state, it has a mesh structure with polygonal mesh, and its proximal end is connected to the delivery guide wire through the first fixing structure, and its distal end is connected to the in vivo collection device through the second fixing structure.

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