Distal aspiration catheter and thrombus aspiration catheter system

Abstract

The utility model provides a far-end aspiration catheter and thrombus aspiration catheter system.The far-end aspiration catheter comprises a catheter body, a delivery piece, a delivery handle, an anchoring balloon and a guide wire tube, an extension channel is formed in the catheter body, and a leading-in opening communicated with the extension channel is formed in the near end of the catheter body; the far end of the delivery part is connected with the near end of the catheter body, and a filling channel is formed in the delivery part. The far end of the delivery handle is connected with the near end of the delivery piece, and an inner cavity of the delivery handle is communicated with the filling channel; the anchoring balloon is arranged on the catheter body in a sleeving mode, and an inner cavity of the anchoring balloon is communicated with the filling channel; the guide wire tube is connected with the catheter body in parallel, the near end of the guide wire tube is located on one side of the far end of the anchoring balloon, the far end of the guide wire tube extends to the far end of the catheter body, and a guide wire cavity allowing a guide wire to penetrate through is formed in the guide wire tube. The effective suction area of the far-end suction catheter is relatively large, the influence of the guide wire on the effective suction area of the catheter cavity can be avoided, and the suction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a distal aspiration catheter and a thrombus aspiration catheter system. Background Art

[0002] Percutaneous transluminal coronary intervention (PCI) refers to the technology of using percutaneous puncture technology to insert a balloon catheter or other related devices to relieve coronary artery stenosis or obstruction and restore coronary blood flow.

[0003] With the continuous development of medicine, medical interventional surgery has also been greatly developed. During the surgical interventional treatment of coronary CTO lesions, the extension catheter is guided by the guide catheter, which can more deeply treat the side branches and lesions far away from the aorta. In the process of small blood vessel interventional treatment, under normal circumstances, the guide catheter will be delivered to the position of a larger blood vessel close to the small blood vessel, and then the guide wire will be passed through the guide catheter and delivered to the thrombus in the small blood vessel. The extension catheter is placed on the guide wire and follows the guide wire to the target area, and then suction is performed. However, this method has the following problems: for distal small blood vessels, an extension catheter needs to be used. Since there is a guide wire in the lumen of the extension catheter, the guide wire occupies the area of ​​the lumen of the extension catheter, and the guide wire is not close to the catheter wall, resulting in an obstructed suction path and a small effective suction area, which affects the suction effect of the thrombus.

[0004] Therefore, it is necessary to provide a distal aspiration catheter with a smooth aspiration pathway that can prevent the guidewire from affecting the effective aspiration area of ​​the lumen, and to provide a thrombus aspiration catheter system having the distal aspiration catheter. Utility Model Content

[0005] The first object of the utility model is to provide a distal suction catheter with a smooth suction passage and capable of preventing the guide wire from affecting the effective suction area of ​​the lumen.

[0006] The second purpose of the present invention is to provide a thrombus aspiration catheter system, which has a distal aspiration catheter, which ensures a smooth aspiration path and prevents the guide wire from affecting the effective aspiration area of ​​the lumen.

[0007] To achieve the above-mentioned first purpose, the present invention provides a distal suction catheter, comprising a catheter body, a delivery member, a delivery handle, an anchoring balloon and a guidewire tube, wherein the catheter body is provided with an extension channel for delivering medical devices, and the proximal end of the catheter body is provided with an introduction port connected to the extension channel; the distal end of the delivery member is connected to the proximal end of the catheter body, and a filling channel is provided inside the delivery member; the distal end of the delivery handle is connected to the proximal end of the delivery member, and the inner cavity of the delivery handle is connected to the filling channel; the anchoring balloon is sleeved on the catheter body and located near the proximal end of the catheter body, and the inner cavity of the anchoring balloon is connected to the filling channel; the guidewire tube is connected to the catheter body in parallel along the catheter direction of the catheter body, and the proximal end of the guidewire tube is located on the distal side of the anchoring balloon, the distal end of the guidewire tube extends to the distal end of the catheter body, and a guidewire cavity for the guidewire to pass through is provided in the guidewire tube.

[0008] Compared with the prior art, the distal suction catheter of the utility model is connected to a guidewire tube in parallel in the catheter direction of the catheter body, so that the guidewire can pass through the guidewire cavity of the guidewire tube without occupying the area of ​​the extension channel of the catheter body, so that the suction path for suction through the extension channel of the catheter body is smooth, and the effective suction area is relatively large, which can avoid the guidewire from affecting the effective suction area of ​​the lumen and improve the suction effect. At the same time, the guidewire passing through the guidewire cavity can also guide and anchor the catheter body, ensuring that the distal suction catheter can be accurately delivered to the target area.

[0009] Preferably, the guide wire tube is arranged on the outer wall of the catheter body.

[0010] Preferably, the catheter body includes an inner layer, a middle reinforcement layer and an outer layer which are sequentially arranged from the inside to the outside.

[0011] Preferably, the inner layer material is polytetrafluoroethylene or linear low-density polyethylene; or / and the middle reinforcement layer is a stainless steel braided mesh layer or a spring layer; or / and the outer layer material is a mixture of one or more of polyether front-end polyamide, nylon and polyurethane elastomer.

[0012] Preferably, a developing element is provided at the proximal end of the catheter body at a position close to the anchoring balloon.

[0013] Preferably, a developing element is provided at the distal end of the catheter body.

[0014] Preferably, the radial cross-sectional structure of the delivery member is one of an ellipse, a circle and a semi-arc.

[0015] To achieve the above-mentioned second purpose, the utility model provides a thrombus aspiration catheter system, including a guiding catheter, a guide wire and the above-mentioned distal aspiration catheter, wherein a guiding channel is provided in the guiding catheter, and when the anchoring balloon is not inflated, the distal aspiration catheter slides in the guiding channel, and the guide wire can movably pass through the guiding channel and the guide wire cavity; when the anchoring balloon is inflated, the anchoring balloon abuts against the inner wall of the guiding channel and the guide wire, and the extension channel is connected to the guiding channel.

[0016] Compared with the prior art, the thrombus aspiration catheter system of the present invention has a distal aspiration catheter, which is connected to a guidewire tube in parallel in the catheter direction of the catheter body, so that the guidewire can pass through the guidewire cavity of the guidewire tube without occupying the area of ​​the extension channel of the catheter body, so that the aspiration path for aspiration through the guide channel and the extension channel is smooth, and the effective aspiration area is relatively large, which can avoid the guidewire from affecting the effective aspiration area of ​​the lumen and improve the aspiration effect. At the same time, the guidewire passing through the guidewire cavity can also guide and anchor the catheter body, ensuring that the distal aspiration catheter can be accurately delivered to the target area.

[0017] Preferably, the distal suction catheter is inserted into the guiding channel, and the distal end of the catheter body passes through the distal end of the guiding channel, the proximal end of the catheter body is located in the guiding channel, and the proximal end of the delivery member is located outside the proximal end of the guiding channel.

[0018] Preferably, the proximal end of the guiding catheter is provided with a catheter seat, and the catheter seat has a first interface and a second interface, the first interface and the second interface are respectively connected to the guiding channel, the guide wire and the distal suction catheter are both inserted into the first interface, and the proximal end of the delivery member is located on the outside of the catheter seat, and the second interface is used for fluid delivery or suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the distal suction catheter of the present utility model.

[0020] Figure 2 yes Figure 1 Schematic cross-sectional view along the AA direction.

[0021] Figure 3 yes Figure 1 A schematic cross-sectional view of another embodiment along the AA direction.

[0022] Figure 4 yes Figure 3 Enlarged view of point C in the middle.

[0023] Figure 5 yes Figure 1 Schematic cross-sectional view along the BB direction.

[0024] Figure 6 yes Figure 1 Schematic cross-sectional view of the second embodiment along the BB direction.

[0025] Figure 7 yes Figure 1 Schematic cross-sectional view of the third embodiment along the BB direction.

[0026] Figure 8 yes Figure 1 Schematic cross-sectional view of the fourth embodiment along the BB direction.

[0027] Figure 9 yes Figure 1 Schematic cross-sectional view of the fifth embodiment along the BB direction.

[0028] Figure 10 A schematic cross-sectional view of the distal suction catheter of the present invention along the catheter direction.

[0029] Figure 11 This is a structural diagram of the thrombus aspiration catheter system according to the first embodiment of the present invention during aspiration operation.

[0030] Figure 12 It is a partial half-section schematic diagram of the thrombus aspiration catheter system of the present invention.

[0031] Figure 13 It is a schematic diagram of the distal structure of a distal suction catheter according to another embodiment of the present invention. DETAILED DESCRIPTION

[0032] To further illustrate the technical content and structural features of the present invention, the following is a detailed description of the embodiments and accompanying drawings. It should be noted that the "proximal end" in the above and following descriptions generally refers to the end of the medical device closest to the operator during normal operation, and the "distal end" generally refers to the end of the medical device that first enters the patient's body during normal operation.

[0033] See also Figures 1 to 13The thrombus aspiration catheter system 200 of the present invention includes a guiding catheter 201 , a guide wire 202 and a distal aspiration catheter 100 . Among them, the distal suction catheter 100 includes a catheter body 1, a delivery component 2, a delivery handle 3, an anchoring balloon 4 and a guidewire tube 5. The catheter body 1 is provided with an extension channel 11 for delivering medical devices, and the proximal end of the catheter body 1 is provided with an introduction port 12 connected to the extension channel 11; the distal end of the delivery component 2 is connected to the proximal end of the catheter body 1, and the interior of the delivery component 2 is provided with a filling channel 21; the distal end of the delivery handle 3 is connected to the proximal end of the delivery component 2, and the inner cavity of the delivery handle 3 is connected to the filling channel 21; the anchoring balloon 4 is sleeved on the catheter body 1 and is located near the proximal end of the catheter body 1, and the inner cavity of the anchoring balloon 4 is connected to the filling channel 21; the guidewire tube 5 is connected in parallel with the catheter body 1 along the catheter direction of the catheter body 1, and the proximal end of the guidewire tube 5 is located on the distal side of the anchoring balloon 4, the distal end of the guidewire tube 5 extends to the distal end of the catheter body 1, and the guidewire tube 5 is provided with a guidewire cavity 51 for the guidewire 202 to pass through. A guiding channel 201a is provided in the guiding catheter 201. When the anchoring balloon 4 is not inflated, the distal suction catheter 100 slides in the guiding channel 201a, and the guide wire 202 can movably pass through the guiding channel 201a and the guide wire cavity 51; when the anchoring balloon 4 is inflated, the anchoring balloon 4 abuts against the inner wall of the guiding channel 201a and the guide wire 202, and the extension channel 11 is connected to the guiding channel 201a.

[0034] Specifically, the distal suction catheter 100 is inserted into the guide channel 201a, and the distal end of the catheter body 1 comes out from the distal end of the guide channel 201a, the proximal end of the catheter body 1 is located in the guide channel 201a, and the proximal end of the delivery component 2 is located outside the proximal end of the guide channel 201a. The introduction port 12 connects the extension channel 11 with the guide channel 201a.

[0035] See also Figure 5 and Figure 6 In one embodiment, the guide wire tube 5 is disposed on the outer wall of the catheter body 1 , but the present invention is not limited thereto.

[0036] See also Figure 1 and Figure 13 In one embodiment, the distal end of the catheter body 1 is provided with an oblique suction port. This oblique suction port increases the contact area between the distal end of the catheter body 1 and the thrombus 300, improving the ability to capture the thrombus 300 and enhancing suction efficiency. The angle between the oblique suction port and the axial direction of the catheter body 1 can be 0-90 degrees, but is not limited thereto.

[0037] See also Figure 3 In one embodiment, the catheter body 1 includes an inner layer 13, an intermediate reinforcement layer 14, and an outer layer 15, which are arranged in order from the inside to the outside. The catheter body 1 is a three-layer composite structure that can provide strong support, pressure resistance, and anti-bending properties.

[0038] In one embodiment, the inner layer 13 is made of polytetrafluoroethylene or linear low-density polyethylene, thereby providing lower friction for other instruments to pass through the extended channel 11 located in the inner layer 13; the middle reinforcement layer 14 is a stainless steel braided mesh layer or a spring layer, so that the catheter body 1 has strong negative pressure resistance and strong support, so as to improve the folding resistance and torsion control of the catheter body 1; the outer layer 15 is made of a mixture of one or more of polyether front-end polyamide, nylon and polyurethane elastomer, and the outer surface has a smoother appearance and feel, fully protecting the blood vessels and avoiding the formation of thrombus 300, dissection, etc.

[0039] In one embodiment, the outer layer 15 decreases in hardness from the proximal end to the distal end of the catheter body 1. This makes the catheter body 1 less obtrusive and better meets the requirements for inserting the catheter body 1 into human blood vessels. This not only allows for more precise and convenient operation for the physician, but also reduces pain for the patient during the procedure. Furthermore, the outer layer 15 is coated with a hydrophilic layer, making the tip of the catheter body 1 soft and non-invasive. This design ensures that the catheter body 1 has excellent support, controllability, and lubricity.

[0040] like Figure 5 and Figure 6 In one embodiment, the catheter body 1 and the guidewire tube 5 are separately provided, and the catheter body 1 and the guidewire tube 5 are bonded, welded, or connected together through a connector. It is understandable that as long as the guidewire cavity 51 and the extension channel 11 are separated, it falls within the scope of this application. Please refer to Figures 7 to 9 In other embodiments, the catheter body 1 and the guidewire tube 5 can also be integrally provided, so that the guidewire cavity 51 and the extension channel 11 are separated and provided, the guidewire cavity 51 is preferably provided in the catheter body 1, and the cross-sectional shape of the extension channel 11 can be variously deformed, for example Figures 7 to 9 As shown, but not limited to.

[0041] See also Figures 1 to 4 、 Figure 10In one embodiment, the distal end of the delivery member 2 is fixed within the wall of the catheter body 1. A through-hole 22 is provided near the proximal end of the delivery member 2, connecting the filling channel 21 with the inner lumen of the anchoring balloon 4. The inner lumens of the delivery handle 3, the filling channel 21 of the delivery member 2, and the inner lumens of the anchoring balloon 4 are interconnected to form a single lumen. A physician can connect the delivery handle 3 to inject fluids or other media, which can enter the anchoring balloon 4 through the inner lumen of the delivery handle 3, the filling channel 21 of the delivery member 2, and the through-hole 22, thereby inflating the anchoring balloon 4 and rapidly anchoring it within the guiding channel 201a of the guiding catheter 201. This seals the distal aspiration catheter 100 and the guiding catheter 201, preventing subsequent aspiration of thrombi or plaques without reducing aspiration pressure and preventing movement of the distal aspiration catheter 100. When inflated, anchoring balloon 4 anchors guidewire 202, preventing it from moving forward or backward during operation. This prevents potential damage to blood vessels caused by movement of distal suction catheter 100 or guidewire 202. Furthermore, because the distal end of delivery element 2 is fixed within the wall of catheter body 1, delivery element 2 can be concealed within the material of catheter body 1, preventing it from damaging blood vessels. Specifically, delivery element 2 is provided with a plurality of through-holes 22, distributed throughout the center of the balloon.

[0042] See also Figures 1 to 4 , Figure 10 In one embodiment, the interior of the delivery element 2 is a hollow structure, the filling channel 21 is formed in the hollow structure, and the distal end of the delivery element 2 extends to a position corresponding to the anchoring balloon 4. However, this is not limiting. For example, in other embodiments, the proximal end of the delivery element 2 is a hollow structure, and the filling channel 21 is formed in the hollow structure.

[0043] In another embodiment, delivery member 2 extends distally, with the distal end of delivery member 2 being a solid structure. This solid structure allows for better transmission of the pushing force. Furthermore, the outer diameter of hollow structure 23 is larger than that of solid structure 24, thereby ensuring the strength of delivery member 2 at the location of hollow structure 23.

[0044] During interventional therapy, the operator can directly grasp the delivery handle 3 to smoothly advance the catheter body 1 within the human body. The delivery member 2 provides excellent support and pushing force for the distal aspiration catheter 100, ensuring a smooth procedure. The delivery member 2 can be made of stainless steel, with a polished exterior to enhance the safety of the interventional procedure.

[0045] In one embodiment, the radial cross-section of the delivery member 2 is one of an elliptical, circular, and semi-arc shape. Furthermore, the delivery member 2 is made of a hypotube.

[0046] See also Figure 1 as well as Figures 10 to 12 In one embodiment, the introduction port 12 of the catheter body 1 is an oblique structure, which can make the distal suction catheter 100 of the present invention have better push delivery. The angle between the oblique structure and the axial direction of the catheter body 1 can be 0-90 degrees, but is not limited thereto.

[0047] The introduction port 12 can be used as a channel for the entry and exit of instruments, and can also be used as a channel for aspirating the thrombus 300. For example, an external catheter or stent can enter the extension channel 11 of the catheter body 1 from the introduction port 12 and move through it to the distal end of the catheter body 1. In this way, the distal aspiration catheter 100 can be used as a rapid exchange catheter, thereby realizing rapid exchange of instruments; for example, the introduction port 12 can also be connected to a syringe through the guiding catheter 201 to facilitate aspiration of the thrombus 300 through the syringe.

[0048] See also Figure 1 and Figure 3 In one embodiment, the anchoring balloon 4 is vacuum-flattened and attached to the outer layer 15 of the catheter body 1. The distal end of the anchoring balloon 4 is tightly welded or bonded to the outer layer 15 of the catheter body 1, thereby forming a sealed end. The proximal end of the anchoring balloon 4 is tightly welded to the outer layer 15 of the catheter and the distal end of the delivery member 2. The welds or bonds at both ends of the entire anchoring balloon 4 have a smooth transition without obvious bumps, making it easier to enter other channels and instruments with low resistance. Specifically, the anchoring balloon 4 can be a compliant balloon. The compliant balloon here means that after the anchoring balloon 4 expands to a predetermined diameter, its diameter and volume can continue to increase with the increase of filling pressure. The anchoring balloon 4 can be made of nylon, polyethylene, polyurethane or polyethylene terephthalate.

[0049] In one embodiment, the proximal end of the catheter body 1 is provided with a developing element 6 at a position close to the anchoring balloon 4, but the present invention is not limited thereto. Furthermore, the distal end of the catheter body 1 may also be provided with a developing element 6, but the present invention is not limited thereto. During the angiography operation, the developing element 6 may display a black shadow to provide position information to the operator. The developing element 6 may be made of an X-ray-opaque developing material, and the developing material may be one or more of gold, tungsten, platinum, and platinum-iridium alloy. The developing element 6 may be a developing ring, or a cylindrical spiral developing coil, or a developing coating coated on the side wall of the catheter body 1. Specifically, the developing element 6 is preferably a developing ring, which can help the operator quickly capture the position of the catheter body 1 and the anchoring balloon 4.

[0050] See also Figure 11 and Figure 12In one embodiment, a catheter seat 203 is provided at the proximal end of the guiding catheter 201. The catheter seat 203 has a first interface 203a and a second interface 203b. The first interface 203a and the second interface 203b are respectively connected to the guiding channel 201a. The guidewire 202 and the distal suction catheter 100 are both inserted into the first interface 203a, and the proximal end of the delivery member 2 is located on the outside of the catheter seat 203. The second interface 203b is used for fluid delivery or suction.

[0051] In one embodiment, after the distal aspiration catheter 100 of the present invention completes the anchoring operation, a contrast agent or other fluid medium can be injected through the catheter seat 203 on the guiding catheter 201. The medium can flow along the guiding channel 201a of the guiding catheter 201 into the extension channel 11 of the catheter body 1 of the distal aspiration catheter 100 for super-selective angiography or other targeted treatments.

[0052] In one embodiment, after the distal aspiration catheter 100 of the present invention has completed the anchoring operation, a related aspiration device can be used to aspirate thrombus 300, calcified plaque, etc. from the blood vessel through the catheter adapter 203 on the guiding catheter 201. Under the action of negative pressure, the thrombus 300, calcified plaque, etc., can flow back along the extension channel 11 of the catheter body 1 of the distal aspiration catheter 100 into the guiding channel 201a of the guiding catheter 201, and ultimately be withdrawn from the body.

[0053] Combine Figures 1 to 13 Taking the example of entering a small blood vessel to aspirate a thrombus 300, the specific working principle of the thrombus aspiration catheter system 200 of the present invention is as follows:

[0054] Entering the target area: Thrombus 300 is located in a small blood vessel. Guide catheter 201 is transported to a larger vessel near the small vessel. Guidewire 202 is then transported along first interface 203a of catheter adapter 203 at the proximal end of guiding catheter 201 to the location of thrombus 300 in the small vessel. Guidewire tube 5 is then transported along guidewire 202 to distal aspiration catheter 100, which extends into guiding catheter 201 through first interface 203a of catheter adapter 203 at the proximal end of guiding catheter 201. The distal end of catheter body 1 of distal aspiration catheter 100 emerges from the distal end of guiding catheter 201, while the proximal end of catheter body 1 is located within guiding channel 201a. One end of delivery member 2 is located within guiding channel 201a, while the other end of delivery member 2 emerges from first interface 203a of catheter adapter 203. Delivery handle 3 is located outside catheter adapter 203. Under the guidance of the guidewire 202, the catheter body 1 enters the finger anchoring position. Since the catheter body 1 contains the delivery component 2, the delivery component 2 can exert force, making it easy for the guiding catheter 201 to enter the branch blood vessels and narrow blood vessels.

[0055] Establish a transmission channel: fill the anchoring balloon 4 through the inner cavity of the delivery handle 3 and the filling channel 21 in the delivery component 2. After the anchoring balloon 4 is expanded, it is anchored in the guiding channel 201a. The anchoring balloon 4 blocks the gap between the guiding catheter 201 and the catheter body 1, and the guiding channel 201a is connected to the catheter cavity.

[0056] Delivery of contrast agent / drug: The first interface 203a of the delivery member 2 extending from the catheter adapter 203 of the guiding catheter 201 is blocked, and the contrast agent / drug is delivered through the second interface 203b of the catheter adapter 203. The contrast agent / drug flows along the guiding channel 201a into the extension channel 11 of the catheter body 1, then flows out at the distal end of the catheter body 1 and flows to the distal end of the small blood vessels, thereby performing super-selective angiography / targeted drug administration.

[0057] An external aspirator is used to aspirate thrombus 300 or plaque: First port 203a, extending from delivery element 2, at catheter hub 203 of guiding catheter 201 is sealed. A suction device is connected to second port 203b of catheter hub 203 to aspirate thrombus 300 or plaque at the distal end of catheter body 1. Under negative pressure, thrombus 300 or calcified plaque flows back through extension channel 11 of catheter body 1 into guiding channel 201a until it is removed from the body.

[0058] Withdrawal of the guidewire 202 (or distal aspiration catheter 100): Use a pressure pump under negative pressure to withdraw the medium within the anchoring balloon 4. Under X-ray fluoroscopy, confirm that the anchoring balloon 4 is deflated and no medium remains. Then withdraw the guidewire 202 (or distal aspiration catheter 100) until it is out of the body.

[0059] In summary, the thrombus aspiration catheter system 200 of the present invention comprises a distal aspiration catheter 100. The distal aspiration catheter 100 is connected to a guidewire tube 5 in parallel with the catheter body 1 in the direction of the catheter, so that the guidewire 202 can pass through the guidewire lumen 51 of the guidewire tube 5 without occupying the area of ​​the extension channel 11 of the catheter body 1. This makes the aspiration path for aspiration through the guide channel 201a and the extension channel 11 smooth, and the effective aspiration area is relatively large. This can prevent the guidewire 202 from affecting the effective aspiration area of ​​the lumen and improve the aspiration effect. At the same time, the guidewire 202 passing through the guidewire lumen 51 can also guide and anchor the catheter body 1, ensuring that the distal aspiration catheter 100 can be accurately delivered to the target area. In addition, because the guidewire 202 does not occupy the area of ​​the extension channel 11 of the catheter body 1, the effective aspiration area is relatively large, which improves the aspiration capability for large thrombi 300 and reduces complications. In addition, the distal aspiration catheter 100 of the present invention can be used as a guiding instrument to be inserted deeper into a farther position in the blood vessel, and can also realize the function of aspirating thrombus 300 and plaque, thereby reducing thrombotic events caused by aspiration of thrombus 300, reducing the exchange between instruments, and improving surgical efficiency.

[0060] The above disclosure is only a preferred embodiment of the present invention and cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope covered by the present invention.

Claims

1. A distal suction catheter, characterized in that: include: A catheter body, wherein the catheter body is provided with an extension channel for conveying medical devices, and a proximal end of the catheter body is provided with an introduction port communicating with the extension channel, the introduction port being an oblique structure, and the axial angle between the introduction port and the catheter body being greater than 0 degrees but less than 90 degrees; a delivery member, wherein the distal end of the delivery member is connected to the proximal end of the catheter body, and a filling channel is provided inside the delivery member; a delivery handle, wherein the distal end of the delivery handle is connected to the proximal end of the delivery member, and the inner cavity of the delivery handle is in communication with the filling channel; an anchoring balloon, the anchoring balloon being sheathed on the catheter body and located near the proximal end of the catheter body, the inner lumen of the anchoring balloon being in communication with the filling channel; A guide wire tube is connected in parallel with the catheter body along the catheter direction of the catheter body, and the proximal end of the guide wire tube is located on the distal side of the anchoring balloon, the distal end of the guide wire tube extends to the distal end of the catheter body, and a guide wire cavity is provided in the guide wire tube for the guide wire to pass through.

2. The distal aspiration catheter according to claim 1, characterized in that The guide wire tube is arranged on the outer wall of the catheter body.

3. The distal aspiration catheter according to claim 1, characterized in that The catheter body comprises an inner layer, a middle reinforcement layer and an outer layer which are sequentially arranged from the inside to the outside.

4. The distal aspiration catheter according to claim 3, characterized in that The inner layer is made of polytetrafluoroethylene or linear low-density polyethylene; or / and the middle reinforcement layer is a stainless steel braided mesh layer or a spring layer; or / and the outer layer is made of a mixture of one or more of polyether front-end polyamide, nylon and polyurethane elastomer.

5. The distal aspiration catheter according to claim 1, characterized in that The proximal end of the catheter body is provided with a visualization element at a position close to the anchoring balloon.

6. The distal aspiration catheter according to claim 1, characterized in that The distal end of the catheter body is provided with a developing element.

7. The distal aspiration catheter according to claim 1, characterized in that The radial cross-sectional structure of the delivery component is one of an ellipse, a circle and a semi-arc.

8. A thrombus aspiration catheter system, characterized in that: The distal aspiration catheter comprises a guiding catheter, a guide wire, and the distal aspiration catheter according to any one of claims 1 to 7, wherein the guiding catheter is provided with a guiding channel, and when the anchoring balloon is not inflated, the distal aspiration catheter slides in the guiding channel, and the guide wire can movably pass through the guiding channel and the guide wire cavity; When the anchoring balloon is inflated, the anchoring balloon abuts against the inner wall of the guiding channel and the guide wire, and the extension channel is communicated with the guiding channel.

9. The thrombus aspiration catheter system according to claim 8, characterized in that: The distal suction catheter is inserted into the guiding channel, and the distal end of the catheter body passes through the distal end of the guiding channel, the proximal end of the catheter body is located in the guiding channel, and the proximal end of the delivery member is located outside the proximal end of the guiding channel.

10. The thrombus aspiration catheter system according to claim 8, characterized in that: The proximal end of the guiding catheter is provided with a catheter seat, and the catheter seat has a first interface and a second interface, the first interface and the second interface are respectively connected to the guiding channel, the guide wire and the distal suction catheter are both inserted into the first interface, and the proximal end of the delivery member is located on the outside of the catheter seat, and the second interface is used for fluid delivery or suction.

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