Thrombus removal catheter for intracavity treatment

Abstract

The invention provides a thrombus removal catheter for intracavity treatment, and belongs to the technical field of medical instruments. Comprising a first guide rod and a cutter body, a guide wire is inserted into the first guide rod, the outer wall of the first guide rod is slidably sleeved with a first isolation sleeve, the outer wall of the first isolation sleeve is slidably sleeved with a second guide rod, and the supporting assembly is used for supporting blood vessels of a patient. By arranging the supporting assembly, thrombus which is separated or falls off from the inner wall of a blood vessel can be blocked and protected, the thrombus is prevented from flowing to the far-end blood vessel along with blood, and the phenomenon of far-end embolism is avoided; the supporting assembly can collect thrombus separated in the cutting process or falling off from the inner wall of a blood vessel in a unified mode, the collected thrombus is discharged out of the body of a patient, the phenomenon of far-end embolism is avoided, and it is guaranteed that the thrombus is not left in the whole thrombus removing process.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a thrombus removal catheter for endovascular treatment. Background Art

[0002] With the continuous development of endovascular treatment technology, although the thrombus removal catheter for endovascular treatment of acute limb ischemia has significant advantages in clinical applications, during the operation of the thrombus removal catheter, some thrombi may fall off, forming distal embolism, thus aggravating the ischemia of the affected limb. Specifically, during the endovascular treatment operation, some thrombi may fall off from their original positions and move with the blood flow to the distal blood vessels. These detached thrombus fragments will form new embolisms at the distal blood vessels, blocking blood flow and thus aggravating the ischemia of the distal limb. This situation will make the already ischemic limb even worse, increasing the complexity of treatment and the pain of the patient.

[0003] For example, Chinese Patent No. CN118750107B discloses a thrombus removal catheter for endovascular treatment of acute limb ischemia, which relates to the technical field of thrombus removal catheters. It includes an outer catheter, an outer catheter cavity for aspirating thrombus is formed inside it, and an installation groove is arranged on the outer surface of the outer catheter. An adaptive occlusion device is located inside the installation groove, and the adaptive occlusion device includes a balloon body fixed inside the installation groove. The polyurethane balloon in the adaptive occlusion device can contract under negative pressure and automatically expand after the pressure is restored, ensuring precise control of blood flow. This design reduces the possibility of thrombus movement or blood vessel rupture during the operation.

[0004] The above technical solution uses a hollow double - auger cutting method to remove thrombi. Compared with the prior art, although the design of the hollow double - auger can ensure the integrity of the thrombus by dispersing force and reducing stress concentration, reducing the risk of blood vessel blockage, during the cutting process, both the double - auger and the single - auger will generate local vibrations in the blood vessel. During the vibration process, large thrombi are prone to separation, and thrombi attached to the blood vessel wall are prone to fall off. After the catheter is removed, some thrombi detached during the cutting process will still remain inside the blood vessel, increasing the risk of forming distal embolism. Therefore, the present invention provides a thrombus removal catheter for endovascular treatment to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a thrombus removal catheter for endovascular treatment. By providing a support assembly, it is possible to shield and protect the thrombus that has been separated or detached from the inner wall of the blood vessel, preventing the thrombus from flowing with the blood to the distal blood vessel and forming the phenomenon of distal embolism. After the thrombus is cleared, the support assembly can uniformly collect the thrombus separated or detached from the inner wall of the blood vessel during the cutting process and discharge the collected thrombus from the patient's body. This not only avoids the phenomenon of distal embolism but also ensures that there is no residue of the thrombus during the entire thrombus removal process, making the removal work more thorough. Through the above settings, the problems of incomplete thrombus removal by the current thrombus removal catheter and the prone occurrence of distal embolism during the removal process can be solved.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A thrombus removal catheter for endovascular treatment, comprising a first guiding rod and a cutter body. A guide wire is inserted into the first guiding rod. A first isolation sleeve is slidably sleeved on the outer wall of the first guiding rod. A second guiding rod is slidably sleeved on the outer wall of the first isolation sleeve. A second isolation sleeve is slidably sleeved on the outer wall of the second guiding rod. A support assembly for supporting the patient's blood vessel, the support assembly is respectively connected to the first guiding rod and the second guiding rod.

[0007] Optionally, a cutting auger is rotatably connected in the cutter body. A circulation hole is penetrated and opened on the outer wall of one end of the cutter body. A delivery pipe is fixedly sleeved on the other end of the cutter body.

[0008] Optionally, the support assembly includes a distal annular skeleton and a distal isolation skeleton fixedly connected to one end of the first guiding rod. The support assembly further includes a proximal annular skeleton fixedly connected to the outer wall of the second guiding rod. The profiles of the distal annular skeleton and the proximal annular skeleton are the same. The size of the proximal annular skeleton is larger than that of the distal annular skeleton. The distal annular skeleton, the distal isolation skeleton, and the proximal annular skeleton are all made of wire braiding.

[0009] Optionally, the distal annular skeleton is composed of two parts, an arc support part and a strengthening support part, and the arc support part is located on both sides of the strengthening support part.

[0010] Optionally, the arc support part has a circular arc profile bent towards the strengthening support part, and the strengthening support part is in an "X" - shaped structure.

[0011] Optionally, a plurality of the arc support parts and the strengthening support parts are braided and wound around each other to form an entire disc - shaped profile.

[0012] Optionally, the distal isolation framework is composed of a gradient support part, a concave support part, and a reinforcing rib. The gradient support parts are symmetrically arranged on both sides of the concave support part, and the reinforcing rib is cross-wound between the gradient support part and the concave support part.

[0013] Optionally, the gradient support part is arranged in a gradient structure, where the size of the gradient support part near the concave support part is larger than that of the other end, and the middle position of the concave support part has an inwardly concave arc-shaped contour.

[0014] Optionally, the number of the distal annular frameworks is two. The distal annular frameworks and the distal isolation framework are connected to each other through a connecting framework. The distal annular frameworks and the distal isolation framework are both fixed to the first guiding rod through a connecting framework, and the proximal annular framework is fixed to the second guiding rod through a connecting framework.

[0015] Optionally, the cutter body is slidably arranged on the outer wall of the second isolation sleeve, and the cutter body is located between the distal isolation framework and the proximal annular framework.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, by setting the support assembly, the blood vessel can be supported and sealed before thrombus removal, thereby providing a more open surgical space for medical staff and improving the upper limit of operation. The support assembly can also block and protect the thrombus separated or detached from the blood vessel inner wall to prevent the thrombus from flowing to the distal blood vessel with the blood and forming the phenomenon of distal embolism. After the thrombus is cleared, the support assembly can collect the thrombus separated or detached from the blood vessel inner wall during the cutting process in a unified manner and discharge the collected thrombus from the patient's body. This not only avoids the phenomenon of distal embolism but also ensures that there is no residue of thrombus during the entire thrombus removal process, making the removal work more thorough.

[0017] The support component provided by this application has three usage states. State 1: With the help of a guide wire, the first guiding rod is passed through the thrombus area in the blood vessel, and the distal annular framework and the distal isolation framework are located in the distal blood vessel of the thrombus area. The first isolation sleeve is pulled outward to deploy the distal annular framework and the distal isolation framework. At this time, the distal annular framework can expand the patient's blood vessel and provide an open surgical channel and space. The distal isolation framework can block the distal blood vessel of the thrombus to prevent the thrombus from flowing into the distal blood vessel along the blood vessel. The separated and detached thrombus from the blood vessel wall during the thrombus removal process will be blocked and collected by the distal isolation framework, thus ensuring the efficiency of the thrombus removal process and avoiding the occurrence of distal embolism. State 2: The proximal annular framework is deployed to expand the patient's blood vessel. Since the size of the proximal annular framework is larger than that of the distal annular framework, the residual thrombus remaining after cutting on the blood vessel wall will flow into the distal blood vessel along the expanded blood vessel and will eventually be isolated and collected by the distal isolation framework, improving the efficiency of collecting the residual thrombus. State 3: The first guiding rod is moved towards the proximal annular framework. During the movement of the first guiding rod, the distal isolation framework will secondarily collect the residual thrombus along the way to prevent thrombus residue. When the distal isolation framework moves to the position of the proximal annular framework, the medical staff will remove all the catheters in the blood vessel from the patient's body. During the removal process, the distal isolation framework will continuously block the thrombus to prevent the thrombus from falling off, and finally achieve the effect of removing all the thrombus from the patient's body, ensuring the thoroughness of the entire thrombus removal work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0019] Figure 1 Schematic three-dimensional structure diagram of a thrombus removal catheter for endovascular treatment; Figure 2 Schematic three-dimensional structure diagram of the cooperation in State 1 of the support component; Figure 3 Schematic three-dimensional structure diagram of the cooperation between the distal annular framework and the distal isolation framework; Figure 4 For Figure 3 Enlarged three-dimensional structure diagram at position A in Figure 5 Schematic cross-sectional three-dimensional structure diagram of the cooperation of the thrombus removal catheter for endovascular treatment; Figure 6 Schematic three-dimensional structure diagram of the cooperation in the first perspective in State 2 of the support component; Figure 7 Schematic three-dimensional structure diagram of the cooperation in State 3 of the support component; Figure 8 is Figure 7 The enlarged three-dimensional structure diagram at position B in Figure 9 is Figure 7 The enlarged three-dimensional structure diagram at position C in Figure 10 It is the second-view matching three-dimensional structure diagram when the support component is in state two.

[0020] Reference numerals: 1. First guiding rod; 101. First isolation sleeve; 2. Distal annular skeleton; 201. Arc-shaped supporting part; 202. Reinforcing supporting part; 3. Distal isolation skeleton; 301. Gradient supporting part; 302. Concave supporting part; 303. Reinforcing rib; 4. Connecting skeleton; 5. Cutter body; 501. Cutting auger; 502. Circulation hole; 503. Delivery pipe; 6. Second guiding rod; 601. Second isolation sleeve; 7. Proximal annular skeleton; 8. Guide wire.

[0021] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0022] The following describes in detail a thrombus removal catheter for endovascular treatment provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0023] It should be noted that in the specification, it is mentioned that "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. Additionally, when combining embodiments to describe specific features, structures, or characteristics, implementing such features, structures, or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0024] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, can alternatively, depending at least in part on the context, allow for the presence of other factors that are not necessarily expressly described.

[0025] It will be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0026] In addition, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. may be used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as illustrated in the figures. Spatial relative terms are intended to encompass different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented, and the spatial relative descriptors used herein may be interpreted accordingly.

[0027] As Figures 1 to 3As shown in the figure, an embodiment of the present invention provides a thrombus removal catheter for endovascular treatment, which includes a first guiding rod 1 and a cutter body 5. A guide wire 8 is inserted into the first guiding rod 1. A first isolation sleeve 101 is slidably sleeved on the outer wall of the first guiding rod 1. A second guiding rod 6 is slidably sleeved on the outer wall of the first isolation sleeve 101. A second isolation sleeve 601 is slidably sleeved on the outer wall of the second guiding rod 6; a support assembly, which is used to support the blood vessel of the patient. The support assembly is respectively connected to the first guiding rod 1 and the second guiding rod 6. In this technical solution, by setting the support assembly, the blood vessel can be supported and sealed before the cutter body 5 removes the thrombus in the blood vessel. The supported blood vessel can provide a wider surgical space for medical staff, improving the upper limit of operation. Moreover, during the entire thrombus removal process, the support assembly can block and protect the separated thrombus or the thrombus detached from the inner wall of the blood vessel, preventing the thrombus from flowing along with the blood to the distal blood vessel and forming the phenomenon of distal embolism. In addition, when the medical staff removes the cutter body 5 from the blood vessel after the thrombus is cleared, the support assembly can collect the separated or detached thrombus from the inner wall of the blood vessel during the cutting process in a unified manner and discharge the collected thrombus from the patient's body. Such a setting not only avoids the phenomenon of distal embolism, but also ensures that there is no residual thrombus during the entire thrombus removal process, making the removal work more thorough.

[0028] As an implementation manner in this embodiment, as Figures 1 to 7As shown, the support assembly includes a distal annular skeleton 2 and a distal isolation skeleton 3 fixedly connected to one end of the first guide rod 1. The distal annular skeleton 2 consists of two parts: an arc support part 201 and a reinforcement support part 202. The arc support part 201 is located on both sides of the reinforcement support part 202, and the arc support part 201 has a circular arc contour that bends towards the reinforcement support part 202. The reinforcement support part 202 is in an "X" shape structure. A number of arc support parts 201 and reinforcement support parts 202 are intertwined and enclosed to form an entire disc-shaped contour. The distal isolation skeleton 3 consists of three parts: a gradient support part 301, a concave support part 302, and a reinforcing rib 303. The gradient support part 301 is symmetrically arranged on both sides of the concave support part 302, and the reinforcing rib 303 is cross-wound between the gradient support part 301 and the concave support part 302. The gradient support part 301 is arranged in a gradient structure, where the size of the gradient support part 301 near the concave support part 302 is larger than that of the other end. The middle position of the concave support part 302 has a circular arc contour that is concave inward. The number of distal annular skeletons 2 is two. The distal annular skeleton 2 and the distal isolation skeleton 3 are connected to each other through a connecting skeleton 4. The distal annular skeleton 2 and the distal isolation skeleton 3 are both fixedly connected to the first guide rod 1 through the connecting skeleton 4. The distal annular skeleton 2 and the distal isolation skeleton 3 are both installed on the outer wall of the first guide rod 1. In the initial state, the first isolation sleeve 101 is located outside the distal annular skeleton 2 and the distal isolation skeleton 3. At this time, both the distal annular skeleton 2 and the distal isolation skeleton are in a state of being compressed by the first isolation sleeve 101. The first guide rod 1 and the first isolation sleeve 101 are tubular structures and are guided into the patient's blood vessel through a guide wire 8. When it is necessary to support and seal the patient's blood vessel with the distal annular skeleton 2 and the distal isolation skeleton 3, the medical staff pulls the first isolation sleeve 101 outwards, so that the distal annular skeleton 2 and the distal isolation skeleton 3 are exposed in the patient's blood vessel, and they automatically deform and expand in the patient's blood vessel by virtue of the elasticity of their own structures.

[0029] Specifically, there are two distal annular skeletons 2 in total, and the overall contour is disc-shaped. When the distal annular skeleton 2 is unfolded, it can expand the patient's blood vessel by means of its disc-shaped contour. Since the arc-shaped support portion 201 has a circular arc contour that bends towards the direction of the strengthening support portion 202, the overall contour of the distal annular skeleton 2 is relatively smooth. Such a setting not only ensures that the distal annular skeleton 2 will not cause scratches to the inner wall of the patient's blood vessel after unfolding, but also guarantees that the distal annular skeleton 2 has a certain flexibility after unfolding, so that the distal annular skeleton 2 will not overly support the patient's blood vessel after unfolding, avoiding excessive local tension of the blood vessel and resulting in damage. Since the strengthening support portion 202 is in an "X" shape structure, such a structure makes the structural strength of the outer circumference of the distal annular skeleton 2 relatively high, ensuring that the distal annular skeleton 2 can fully expand the patient's blood vessel after unfolding, providing a wider surgical space for medical staff and improving the convenience of operation. Since there are two distal annular skeletons 2 in total, and these two distal annular skeletons 2 are fixedly connected to each other through the connecting skeleton 4, such a setting enables the two distal annular skeletons 2 to fully expand the blood vessel after unfolding, forming an open blood vessel channel.

[0030] Furthermore, after the distal isolation skeleton 3 is unfolded, it is a tapered cylindrical structure with smaller sizes at both ends and a larger size in the middle. Compared with the distal annular skeleton 2, the overall structure density of the distal isolation skeleton 3 is greater. Therefore, when the distal isolation skeleton 3 is unfolded, it can block and intercept the thrombus in the blood vessel, thereby preventing the thrombus from flowing along the blood vessel to the distal blood vessel and causing the phenomenon of distal embolism. Since the middle position of the concave support portion 302 has a circular arc contour that is concave inward, such a setting makes the density of the middle position of the distal isolation skeleton 3 higher after unfolding, which is more conducive to intercepting and accommodating the thrombus inside the distal isolation skeleton 3. The reinforcing ribs 303 are cross-wound between the tapered support portion 301 and the concave support portion 302. On the basis of ensuring the structural strength of the distal isolation skeleton 3, the distal isolation skeleton 3 deforms more quickly and thoroughly during the deformation process, improving the effect of intercepting and accommodating the thrombus.

[0031] In this embodiment, as Figures 1 to 10As shown, the support assembly further includes a proximal annular skeleton 7 fixedly connected to the outer wall of the second guide rod 6. The distal annular skeleton 2 and the proximal annular skeleton 7 have the same profile, and the size of the proximal annular skeleton 7 is larger than that of the distal annular skeleton 2. The distal annular skeleton 2, the distal isolation skeleton 3, and the proximal annular skeleton 7 are all made of woven metal wires. The proximal annular skeleton 7 and the second guide rod 6 are fixed to each other through a connecting skeleton 4. A cutting auger 501 is rotatably connected inside the cutter body 5. A circulation hole 502 is formed through the outer wall of one end of the cutter body 5. A delivery pipe 503 is fixedly sleeved on the other end of the cutter body 5. The cutter body 5 is slidably arranged on the outer wall of the second isolation sleeve 601. The cutter body 5 is located between the distal isolation skeleton 3 and the proximal annular skeleton 7. The working principles of the second guide rod 6 and the second isolation sleeve 601 are the same as those of the first guide rod 1 and the first isolation sleeve 101, so they will not be elaborated in this technical solution. It is worth mentioning that the distal annular skeleton 2 and the proximal annular skeleton 7 have the same profile, and the proximal annular skeleton 7 can also support the patient's blood vessel after being deployed.

[0032] Further, there are three usage states of the support assembly in the technical solution provided by this application, and these three usage states respectively correspond to the specific process of thrombus removal. In the first state: medical staff use a guide wire 8 to guide the first guide rod 1 and the first isolation sleeve 101 into the patient's blood vessel, and let the first guide rod 1 pass through the thrombus area in the blood vessel, so that the distal annular skeleton 2 and the distal isolation skeleton 3 are located in the distal blood vessel of the thrombus area. Then, the first isolation sleeve 101 is pulled outwards to deploy the distal annular skeleton 2 and the distal isolation skeleton 3 (as Figure 2 shown). In this state, the distal annular skeleton 2 can expand the patient's blood vessel and provide an open surgical channel and space. The distal isolation skeleton 3 can block the distal blood vessel of the thrombus to prevent the thrombus from flowing into the distal blood vessel along the blood vessel. At this time, the medical staff implant the cutter body 5 into the patient's blood vessel and use the cutting auger 501 to remove the thrombus in the blood vessel. During the removal process, the thrombus cut by the cutting auger 501 will be discharged from the patient's body along the delivery pipe 503. The thrombus separated and detached from the blood vessel wall during the cutting process will be blocked and collected by the distal isolation skeleton 3, thus ensuring the efficiency of the thrombus removal process and avoiding the occurrence of distal embolism.

[0033] In the second state, after the thrombus in the blood vessel has been cut by the cutter body 5, the medical staff first remove the cutter body 5 from the blood vessel, and then pull out the second isolation sleeve 601. At this time, the proximal annular skeleton 7 will expand and expand the patient's blood vessel during the expansion process (as Figure 6As shown, since the size of the proximal annular frame 7 is larger than that of the distal annular frame 2, when the blood vessel is expanded by the proximal annular frame 7, a larger deformation will occur compared to the distal end of the blood vessel. Such a setting enables the thrombus remaining on the inner wall of the blood vessel after cutting to flow into the distal blood vessel along the expanded blood vessel and is finally isolated and collected by the distal isolation frame 3, improving the efficiency of collecting the remaining thrombus.

[0034] In state three, the medical staff simultaneously pull the first guide rod 1 and the first isolation sleeve 101 outward, causing the first guide rod 1 to move towards the proximal annular frame 7 and finally move to the position of the proximal annular frame 7 (as Figure 7 shown). Since the size of the proximal annular frame 7 is larger than that of the distal annular frame 2, the distal annular frame 2 and the distal isolation frame 3 will not be blocked by the inner wall of the blood vessel during the movement towards the proximal annular frame 7, improving the smoothness of the movement of the first guide rod 1. And during the movement of the first guide rod 1, the distal isolation frame 3 will secondarily collect the remaining thrombus along the way to prevent thrombus residue. When the distal isolation frame 3 moves to the position of the proximal annular frame 7, the medical staff simultaneously pull the first guide rod 1, the first isolation sleeve 101, the second guide rod 6, and the second isolation sleeve 601 to remove all the catheters in the blood vessel from the patient's body. During the removal process, the distal isolation frame 3 will continuously block the thrombus to prevent the thrombus from falling off, and finally achieve the effect of removing all the thrombus from the patient's body, ensuring the thoroughness of the entire thrombus removal work.

[0035] The working principle of the technical solution provided by the present invention is as follows: During use, first guide the first guiding catheter and the first isolation sleeve 101 into the patient's blood vessel through the guide wire 8, and let the first guiding rod 1 pass through the thrombus area in the blood vessel, so that the distal annular framework 2 and the distal isolation framework 3 are located in the distal blood vessel of the thrombus area. Then, pull the first isolation sleeve 101 outward to deploy the distal annular framework 2 and the distal isolation framework 3. At this time, the medical staff implants the cutter body 5 into the patient's blood vessel, and uses the cutting auger 501 to remove the thrombus in the blood vessel. During the removal process, the thrombus cut by the cutting auger 501 will be discharged from the patient's body along the delivery tube 503. The thrombus separated and detached from the blood vessel wall during the cutting process will be blocked and collected by the distal isolation framework 3. When the thrombus in the blood vessel is completely cut by the cutter body 5, the medical staff first removes the cutter body 5 from the blood vessel, and then pulls the second isolation sleeve 601 outward. At this time, the proximal annular framework 7 will deploy and expand the patient's blood vessel during the deployment process. Then, the medical staff simultaneously pulls the first guiding rod 1 and the first isolation sleeve 101 outward, so that the first guiding rod 1 moves toward the proximal annular framework 7. During the movement of the first guiding rod 1, the distal isolation framework 3 will collect the residual thrombus along the way to prevent thrombus residue. When the distal isolation framework 3 moves to the position of the proximal annular framework 7, the medical staff simultaneously pulls the first guiding rod 1, the first isolation sleeve 101, the second guiding rod 6 and the second isolation sleeve 601 to remove all the catheters in the blood vessel from the patient's body. During the removal process, the distal isolation framework 3 will continuously block the thrombus to prevent the thrombus from falling off, and finally achieve the effect of removing all the thrombus from the patient's body, ensuring the thoroughness of the entire thrombus removal work.

[0036] The present invention covers any alternatives, modifications, equivalent methods and solutions made within the spirit and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. In addition, well-known methods, processes, procedures, components and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A thrombus removal catheter for endovascular treatment, comprising a first guiding rod and a cutter body, characterized in that, The guide wire is inserted into the first guiding rod. A first isolation sleeve is slidably sleeved on the outer wall of the first guiding rod. A second guiding rod is slidably sleeved on the outer wall of the first isolation sleeve. A second isolation sleeve is slidably sleeved on the outer wall of the second guiding rod. A support assembly for supporting the blood vessel of a patient, and the support assembly is respectively connected to the first guiding rod and the second guiding rod.

2. The thrombus removal catheter for endovascular treatment according to claim 1, characterized in that, A cutting auger is rotatably connected in the cutter body. A circulation hole is penetrated and opened on the outer wall of one end of the cutter body. A delivery pipe is fixedly sleeved on the other end of the cutter body.

3. The thrombus removal catheter for endovascular treatment according to claim 1, wherein The support assembly includes a distal annular skeleton and a distal isolation skeleton fixedly connected to one end of the first guiding rod. The support assembly further includes a proximal annular skeleton fixedly connected to the outer wall of the second guiding rod. The contours of the distal annular skeleton and the proximal annular skeleton are the same. The size of the proximal annular skeleton is larger than that of the distal annular skeleton. The distal annular skeleton, the distal isolation skeleton and the proximal annular skeleton are all made of metal wires.

4. The thrombus removal catheter for endovascular treatment according to claim 3, characterized in that, The distal annular skeleton is composed of two parts, an arc support part and a strengthening support part, and the arc support part is located on both sides of the strengthening support part.

5. The thrombus removal catheter for endovascular treatment according to claim 4, characterized in that, The arc support part has a circular arc contour bent towards the strengthening support part, and the strengthening support part is in an "X" shape structure.

6. The intracavitary thrombus removal catheter according to claim 4, characterized in that: A plurality of the arc support parts and the strengthening support parts are intertwined and wound around to form an entire disc-shaped contour.

7. The thrombus removal catheter for endovascular treatment according to claim 3, wherein The distal isolation skeleton is composed of three parts, a gradient support part, a concave support part and a reinforcing rib. The gradient support parts are symmetrically arranged on both sides of the concave support part, and the reinforcing rib is cross-wound between the gradient support part and the concave support part.

8. The thrombus removal catheter for endovascular treatment according to claim 7, wherein The gradient support part is arranged in a gradient structure, and the size of the gradient support part near one end of the concave support part is larger than that of the other end. The middle position of the concave support part has a circular arc contour sunken inward.

9. The thrombus removal catheter for endovascular treatment according to claim 3, characterized in that, The number of the distal annular skeletons is two. The distal annular skeleton and the distal isolation skeleton are connected to each other through a connecting skeleton. The distal annular skeleton and the distal isolation skeleton are both fixedly connected to the first guiding rod through a connecting skeleton. The proximal annular skeleton and the second guiding rod are fixedly connected to each other through a connecting skeleton.

10. The thrombus removal catheter for endovascular treatment according to claim 3, characterized in that, The cutter body is slidably arranged on the outer wall of the second isolation sleeve, and the cutter body is located between the distal isolation skeleton and the proximal annular skeleton.

Images