Guiding suction catheter and catheter system with same

Abstract

The invention provides a guide suction catheter and a catheter system with the catheter, the guide suction catheter comprises a catheter main body, a delivery piece, a delivery handle, an anchoring balloon and a guide wire tube, an extension channel is arranged in the catheter main body, and the near end of the catheter main body is provided with a leading-in port communicated with the extension channel; 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 guide 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

[0001] This application is a divisional application of the Chinese Invention Patent Application with the application number 2024106678746 and the application date May 27, 2024, and the title "Guiding Aspiration Catheter and Catheter System Having the Catheter". TECHNICAL FIELD

[0002] The present application relates to the technical field of medical devices, and in particular to a guiding aspiration catheter and a catheter system having the catheter. BACKGROUND

[0003] Percutaneous transluminal coronary intervention (PCI) refers to a technique of using percutaneous puncture technology to send in a balloon catheter or other related instruments to remove coronary artery stenosis or obstruction and to reconstruct coronary artery blood flow.

[0004] With the continuous development of medicine, medical intervention surgery has also been greatly developed. The extension catheter can guide the guiding catheter to treat the collateral and the lesion far away from the aorta in the process of coronary CTO lesion interventional therapy. In the process of small vessel interventional therapy, generally, the guiding catheter is delivered to the position of the larger blood vessel close to the small blood vessel, then the guide wire is passed through the guiding catheter and delivered to the thrombus of the small blood vessel, the extension catheter is sleeved on the guide wire and reaches the target area along the guide wire, and then the aspiration is performed. However, this method has the following problems: for the distal small blood vessel, the extension catheter needs to be used, and since the guide wire exists 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, which causes the aspiration passage to be not smooth, the effective aspiration area is small, and the thrombus aspiration effect is affected.

[0005] Therefore, it is necessary to provide a guiding aspiration catheter with a smooth aspiration passage and avoiding the influence of the guide wire on the effective aspiration area of the lumen, and to provide a catheter system having the guiding aspiration catheter. SUMMARY

[0006] The first object of the present application is to provide a guiding aspiration catheter with a smooth aspiration passage and avoiding the influence of the guide wire on the effective aspiration area of the lumen.

[0007] The second object of the present application is to provide a catheter system having a guiding aspiration catheter, which ensures a smooth aspiration passage and avoids the influence of the guide wire on the effective aspiration area of the lumen.

[0008] To achieve the above first object, the application provides a guide suction catheter, comprising a catheter main body, a delivery part, a delivery handle, an anchoring balloon and a guide wire tube, the catheter main body is internally provided with an extension channel for conveying medical devices, the proximal end of the catheter main body is provided with a guide inlet in communication with the extension channel; the distal end of the delivery part is connected with the proximal end of the catheter main body, the inside of the delivery part is provided with a filling channel; the distal end of the delivery handle is connected with the proximal end of the delivery part, the inner cavity of the delivery handle is in communication with the filling channel; the anchoring balloon is sleeved on the catheter main body and located at a position close to the proximal end of the catheter main body, the inner cavity of the anchoring balloon is in communication with the filling channel; the guide wire tube is connected with the catheter main body in parallel along the catheter direction of the catheter main body, and the proximal end of the guide wire tube is located on the distal end side of the anchoring balloon, the distal end of the guide wire tube extends to the distal end of the catheter main body, and the guide wire tube is internally provided with a guide wire cavity for the guide wire to pass through.

[0009] Compared with the prior art, the guide suction catheter of the application is connected with the guide wire tube in parallel along the catheter direction of the catheter main body, so that the guide wire can pass through the guide wire cavity of the guide wire tube without occupying the area of the extension channel of the catheter main body, the suction passage through the extension channel of the catheter main body is smooth, the effective suction area is relatively large, the influence of the guide wire on the effective suction area of the lumen can be avoided, and the suction effect is improved, at the same time, the guide wire passing through the guide wire cavity can also guide and anchor the catheter main body, so that the guide suction catheter can be accurately conveyed to the target area.

[0010] Preferably, the guide wire cavity is arranged in the catheter main body.

[0011] Preferably, the distal end of the catheter main body is a beveled suction port.

[0012] Preferably, the catheter main body comprises an inner layer, an intermediate reinforcing layer and an outer layer arranged in sequence from inside to outside.

[0013] Preferably, the hardness of the outer layer decreases from the proximal end to the distal end of the catheter main body.

[0014] Preferably, the distal end of the delivery part is fixed in the wall of the catheter main body, the delivery part is provided with a through hole at a position close to the proximal end of the catheter main body, and the through hole is in communication between the filling channel and the inner cavity of the anchoring balloon.

[0015] Preferably, the inside of the delivery part is a hollow structure, the filling channel is formed in the hollow structure, and the distal end of the delivery part extends to a position corresponding to the anchoring balloon.

[0016] Preferably, the guide inlet of the catheter main body is in a beveled structure.

[0017] To achieve the above-mentioned second object, the present application provides a catheter system, comprising a guide catheter, a guide wire and the guide suction catheter mentioned above, the guide catheter is provided with a guide channel, when the anchor balloon is not inflated, the guide suction catheter slides in the guide channel, the guide wire is movably arranged through the guide channel and the guide wire cavity; when the anchor balloon is inflated, the anchor balloon abuts on the inner wall of the guide channel after expansion, and the extension channel communicates with the guide channel.

[0018] Compared with the prior art, the catheter system of the present application has a guide suction catheter, which is connected with a guide wire tube in parallel in the catheter direction of the catheter body, so that the guide wire can pass through the guide wire cavity of the guide wire tube without occupying the area of the extension channel of the catheter body, so that the suction passage through the guide channel and the extension channel is smooth, the effective suction area is relatively large, the influence of the guide wire on the effective suction area of the lumen can be avoided, and the suction effect is improved, at the same time, the guide wire passing through the guide wire cavity can also guide and anchor the catheter body, so that the guide suction catheter can be accurately delivered to the target area.

[0019] Preferably, the guide suction catheter is inserted into the guide channel, and the distal end of the catheter body is arranged to pass out of the distal end of the guide channel, the proximal end of the catheter body is arranged inside the guide channel, and the proximal end of the delivery member is arranged outside the proximal end of the guide channel. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the guide suction catheter of the present application.

[0021] Figure 2 is Figure 1 is a sectional view along the A-A direction in the above-mentioned embodiment.

[0022] Figure 3 is Figure 1 is a sectional view along the A-A direction of another embodiment in the above-mentioned embodiment.

[0023] Figure 4 is Figure 3 is an enlarged view of C in the above-mentioned embodiment.

[0024] Figure 5 is Figure 1 is a sectional view along the B-B direction in the above-mentioned embodiment.

[0025] Figure 6 is Figure 1 is a sectional view along the B-B direction of a second embodiment in the above-mentioned embodiment.

[0026] Figure 7 is Figure 1 is a sectional view along the B-B direction of a third embodiment in the above-mentioned embodiment.

[0027] Figure 8 is Figure 1 is a sectional view of the fourth embodiment along the direction of B-B.

[0028] Figure 9 is Figure 1 is a sectional view of the fifth embodiment along the direction of B-B.

[0029] Figure 10 is a sectional view of the guide suction catheter of the present application along the direction of the catheter.

[0030] Figure 11 is a structural view of the catheter system of the first embodiment of the present application during suction operation.

[0031] Figure 12 is a partial semi-sectional view of the catheter system of the present application.

[0032] Figure 13 is a schematic view of the distal end structure of the guide suction catheter of another embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to describe the technical content and structural features of the present application in detail, the following further description is made in combination with the embodiments and the accompanying drawings. It should be noted that in the above description and the following description, the "proximal end" generally refers to the end of the medical device close to the operator during normal operation, and the "distal end" generally refers to the end of the medical device first entering the patient's body during normal operation.

[0034] Please refer to Figures 1 to 13The catheter system 200 of the present application comprises a guide catheter 201, a guide wire 202 and a guide suction catheter 100. The guide suction catheter 100 comprises a catheter body 1, a delivery member 2, a delivery handle 3, an anchor balloon 4 and a guide wire tube 5. The catheter body 1 is provided with an extension channel 11 for conveying medical devices, and a guide inlet 12 in communication with the extension channel 11 at the proximal end of the catheter body 1. The distal end of the delivery member 2 is connected to the proximal end of the catheter body 1, and the interior of the delivery member 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 member 2, and the inner cavity of the delivery handle 3 is in communication with the filling channel 21. The anchor balloon 4 is sleeved on the catheter body 1 and located at a position close to the proximal end of the catheter body 1, and the inner cavity of the anchor balloon 4 is in communication with the filling channel 21. The guide wire tube 5 is connected to the catheter body 1 in parallel along the catheter direction of the catheter body 1, and the proximal end of the guide wire tube 5 is located on the distal side of the anchor balloon 4, and the distal end of the guide wire tube 5 extends to the distal end of the catheter body 1. The guide wire tube 5 is provided with a guide wire cavity 51 for the guide wire 202 to pass through. The guide catheter 201 is provided with a guide channel 201a. When the anchor balloon 4 is not filled, the guide suction catheter 100 slides in the guide channel 201a, and the guide wire 202 movably passes through the guide channel 201a and the guide wire cavity 51. When the anchor balloon 4 is filled, the anchor balloon 4 expands and abuts against the inner wall of the guide channel 201a and the guide wire 202, and the extension channel 11 is in communication with the guide channel 201a.

[0035] Specifically, the guide suction catheter 100 is inserted into the guide channel 201a, and the distal end of the catheter body 1 is out of the distal end of the guide channel 201a, the proximal end of the catheter body 1 is located in the guide channel 201a, the proximal end of the delivery member 2 is located outside the proximal end of the guide channel 201a, and the guide inlet 12 is in communication with the extension channel 11 and the guide channel 201a.

[0036] Please refer to Figure 5 and Figure 6 In an embodiment, the guide wire tube 5 is arranged on the outer wall of the catheter body 1, but it is not limited thereto.

[0037] Please refer to Figure 1 and Figure 13 In an embodiment, the distal end of the catheter body 1 is a beveled suction port. By setting the distal end of the catheter body 1 as a beveled suction port, the contact area of the distal end of the catheter body 1 with the thrombus 300 is increased, the thrombus 300 capture ability is improved, and the suction efficiency is improved. The angle between the beveled suction port and the axial direction of the catheter body 1 can be 0-90 degrees, but it is not limited thereto.

[0038] Please refer to Figure 3 In an embodiment, the catheter body 1 comprises an inner layer 13, an intermediate reinforcing layer 14 and an outer layer 15 arranged in sequence from inside to outside. The catheter body 1 is a three-layer composite structure, which can provide strong support, pressure resistance and bending resistance.

[0039] In an embodiment, the inner layer 13 is made of polytetrafluoroethylene or linear low-density polyethylene, thereby providing lower friction for other instruments passing through the extension channel 11 located in the inner layer 13; the middle reinforcing layer 14 is a stainless steel woven mesh layer or a spring layer, so that the catheter body 1 has strong negative pressure resistance and strong support, thereby improving the bending resistance and torsion control of the catheter body 1; the outer layer 15 is made of a mixture of one or more of polyether prefront polyamide, nylon and polyurethane elastomer, and has a smoother appearance and feel on the outer surface, thereby fully protecting the blood vessels and avoiding thrombus 300, dissection and the like.

[0040] In an embodiment, the hardness of the outer layer 15 decreases from the proximal end to the distal end of the catheter body 1. This makes the catheter body 1 less conspicuous and better meets the needs of the catheter body 1 in the human body blood vessels, which can make the doctor more accurate and convenient to operate, and can reduce the pain of the patient during the operation. Further, the outer layer 15 is also coated with a hydrophilic layer, and the head end of the catheter body 1 is soft and non-invasive. This design ensures that the catheter body 1 has good support, control and lubricity.

[0041] As Figure 5 and Figure 6 In an embodiment, the catheter body 1 and the guide wire tube 5 are separately arranged, and the catheter body 1 and the guide wire tube 5 are bonded, fused or connected together through a connecting piece. It can be understood that as long as the guide wire cavity 51 and the extension channel 11 are separately arranged, it falls within the scope of the present application. Please refer to Figures 7 to 9 In other embodiments, the catheter body 1 and the guide wire tube 5 can also be integrally arranged, so that the guide wire cavity 51 and the extension channel 11 are separately arranged, the guide wire cavity 51 is preferentially arranged in the catheter body 1, and the cross-sectional shape of the extension channel 11 can be deformed in multiple ways, such as Figures 7 to 9 but not limited thereto.

[0042] Please refer to Figures 1 to 4 , Figure 10In an embodiment, the distal end of the delivery member 2 is fixed in the wall of the catheter body 1, and the delivery member 2 is provided with a through hole 22 at a position close to the proximal end of the catheter body 1, the through hole 22 being in communication between the inflation channel 21 and the inner cavity of the anchoring balloon 4. The inner cavity of the delivery handle 3, the inflation channel 21 of the delivery member 2 and the inner cavity of the anchoring balloon 4 are in communication with each other and form a single-cavity channel, and the doctor can connect a fluid injection medium at the delivery handle 3, the fluid injection medium can enter the anchoring balloon 4 through the inner cavity of the delivery handle 3, the inflation channel 21 of the delivery member 2 and the through hole 22, so as to inflate the anchoring balloon 4, so that the anchoring balloon 4 is quickly anchored in the guide channel 201a of the guide catheter 201 and is blocked, and the guide suction catheter 100 and the guide catheter 201 are sealingly connected, and during subsequent suction of thrombus or plaque, the suction pressure is not reduced, and the guide suction catheter 100 is prevented from moving. The anchoring balloon 4 can anchor the guide wire 202 during the operation of the doctor, and prevent the guide wire 202 from moving forward and backward, so as to avoid the damage to the blood vessel caused by the movement of the guide suction catheter 100 or the guide wire 202. In addition, since the distal end of the delivery member 2 is fixed in the wall of the catheter body 1, the delivery member 2 can be hidden in the middle of the material of the catheter body 1, so that the delivery member 2 does not cause damage to the blood vessel. Specifically, the delivery member 2 is provided with a plurality of through holes 22, and the through holes 22 are distributed at the middle position of the balloon.

[0043] Please refer to Figures 1 to 4 , Figure 10 In an embodiment, the inside of the delivery member 2 is in a hollow structure, the inflation channel 21 is formed in the hollow structure, and the distal end of the delivery member 2 extends to a position corresponding to the anchoring balloon 4. However, this is not limited, for example, in other embodiments, the proximal end of the delivery member 2 is in a hollow structure, and the inflation channel 21 is formed in the hollow structure.

[0044] In another embodiment, the delivery member 2 extends to the distal end, and the distal end of the delivery member 2 is in a solid structure. By setting the distal end of the delivery member 2 as a solid structure, the pushing force can be better transmitted. Further, the outer diameter of the hollow structure 23 is greater than the outer diameter of the solid structure 24, so as to ensure the strength of the pushing rod delivery member 2 at the position of the hollow structure 23.

[0045] During the interventional treatment, the operator can directly hold the delivery handle 3 to smoothly push the catheter body 1 in the human body, and the delivery member 2 provides good support force and pushing force for the guide suction catheter 100, so as to ensure the smooth progress of the operation. The delivery member 2 can be made of stainless steel, and the outer surface is polished to improve the safety of the interventional treatment.

[0046] Please refer to Figure 1 and Figures 10 to 12In an embodiment, the guide inlet 12 of the catheter body 1 is in a beveled structure, so that the guide and suction catheter 100 has better pushability and delivery. The angle between the beveled structure and the axial direction of the catheter body 1 can be 0-90 degrees, but is not limited thereto.

[0047] The guide inlet 12 can be used as a channel for the instrument to enter and exit, and can also be used as a channel for the thrombus 300 to be suctioned. For example, a catheter or a stent connected externally can enter the extension channel 11 of the catheter body 1 from the guide inlet 12 and move through to the distal end of the catheter body 1, so that the guide and suction catheter 100 can be used as a rapid exchange catheter, thereby achieving rapid exchange of the instrument. For another example, the guide inlet 12 can be connected with a syringe through the guide catheter 201, so as to achieve suction of the thrombus 300 through the syringe.

[0048] Please refer to Figure 1 and Figure 3 In an embodiment, the anchoring balloon 4 is vacuumed and flatly attached to the outer layer 15 of the catheter body 1, the distal end of the anchoring balloon 4 is tightly welded or bonded with 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 with the outer layer 15 of the catheter body 1 and the distal end of the delivery member 2, the welded or bonded parts at both ends of the anchoring balloon 4 are smoothly transitioned without obvious concave-convex feeling, so that other channel instruments can be more smoothly and low-resistance. Specifically, the anchoring balloon 4 can be a compliant balloon, which means that after the anchoring balloon 4 is expanded to a predetermined diameter, its diameter and volume can continuously increase with the increase of the filling pressure. The anchoring balloon 4 can be made of nylon, polyethylene, polyurethane or polyethylene terephthalate material.

[0049] In an embodiment, the outer layer 15 of the catheter body 1 is provided with a developing element 6 near the anchoring balloon 4, but is not limited thereto. Further, the distal end of the catheter body 1 can also be provided with the developing element 6, but is not limited thereto. In the operation of angiography, the developing element 6 can show a black shadow to provide position information for the operator. The developing element 6 can be made of a developing material which is not transparent to X-rays, and the developing material can be one or more of gold, tungsten, platinum gold and platinum-iridium alloy. The developing element 6 can be a developing ring, 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 to quickly capture the position of the catheter body 1 and the anchoring balloon 4.

[0050] Please refer to Figure 11 and Figure 12In an embodiment, the proximal end of the guide catheter 201 is provided with a catheter seat 203, which has a first interface 203a and a second interface 203b, the first interface 203a and the second interface 203b are respectively communicated with the guide channel 201a, the guide wire 202 and the guide suction catheter 100 are inserted into the first interface 203a, and the proximal end of the delivery member 2 is located outside the catheter seat 203, and the second interface 203b is used for fluid delivery or suction.

[0051] In an embodiment, after the guide suction catheter 100 of the present application completes the anchoring operation, a contrast agent or other fluid medium can be injected through the catheter seat 203 on the guide catheter 201, which can flow along the guide channel 201a of the guide catheter 201 into the extension channel 11 of the catheter main body 1 of the guide suction catheter 100, and super-selective contrast or other targeted treatment can be performed.

[0052] In an embodiment, after the guide suction catheter 100 of the present application completes the anchoring operation, the relevant suction instrument can be used to perform the operation of suctioning the thrombus 300, calcified plaque and the like in the blood vessel through the catheter seat 203 on the guide catheter 201. The thrombus 300 or calcified plaque and the like can flow back to the guide channel 201a of the guide catheter 201 along the extension channel 11 of the catheter main body 1 of the guide suction catheter 100 under the action of negative pressure, and finally be extracted out of the body.

[0053] In combination Figures 1 to 13 Taking the example of suctioning the thrombus 300 into a small blood vessel, the specific working principle of the catheter system 200 of the present application is as follows:

[0054] Into the target area: the thrombus 300 is in a small blood vessel, the guide catheter 201 is delivered to a larger blood vessel close to the small blood vessel, the guide wire 202 is delivered to the thrombus 300 in the small blood vessel along the first interface 203a of the catheter seat 203 at the proximal end of the guide catheter 201. The guide suction catheter 100 is delivered along the guide wire 202, and the guide suction catheter 100 is inserted into the guide catheter 201 from the first interface 203a of the catheter seat 203 at the proximal end of the guide catheter 201. The distal end of the catheter main body 1 of the guide suction catheter 100 is exposed from the distal end of the guide catheter 201, the proximal end of the catheter main body 1 is located in the guide channel 201a, one end of the delivery member 2 is located in the guide channel 201a, the other end of the delivery member 2 is exposed from the first interface 203a of the catheter seat 203, and the delivery handle 3 is located outside the catheter seat 203. Under the guidance of the guide wire 202, the catheter main body 1 enters the guide catheter 201, and since the catheter main body 1 contains the delivery member 2, the delivery member 2 can apply force, so that the guide catheter 201 is easily guided into the branch blood vessel and the narrow blood vessel.

[0055] Establishing a transmission channel: inflate the anchor balloon 4 through the inner cavity of the delivery handle 3 and the filling channel 21 in the delivery member 2, the anchor balloon 4 expands and anchors in the guide channel 201a, the anchor balloon 4 blocks the gap between the guide catheter 201 and the catheter body 1, and the guide channel 201a is in communication with the catheter lumen.

[0056] Transporting contrast agent / drug: block the first interface 203a of the catheter seat 203 of the guide catheter 201 extending out of the delivery member 2, transport the contrast agent / drug at the second interface 203b of the catheter seat 203, and the contrast agent / drug flows into the elongated channel 11 of the catheter body 1 along the guide channel 201a, and then flows out of the distal end of the catheter body 1, and the contrast agent / drug flows to the distal end of the small blood vessels, thereby performing superselective angiography / targeted drug delivery.

[0057] Aspirating thrombus 300, plaque with external suction device: block the first interface 203a of the catheter seat 203 of the guide catheter 201 extending out of the delivery member 2, connect the suction device at the second interface 203b of the catheter seat 203, and aspirate the thrombus 300, plaque at the distal end of the catheter body 1. The thrombus 300 or calcified plaque, etc. under the action of negative pressure flows back along the elongated channel 11 of the catheter body 1 to the guide channel 201a, and is finally aspirated out of the body.

[0058] Withdrawal of guide wire 202(or guide suction catheter 100): withdraw the medium in the anchor balloon 4 under the negative pressure state of the pressure pump. Under X-ray fluoroscopy, it is determined that the anchor balloon 4 is deflated and no medium is left, and the guide wire 202(or guide suction catheter 100) is withdrawn in its entirety until it is withdrawn out of the body.

[0059] In summary, the catheter system 200 of the present application has a guide suction catheter 100 which is connected with a guide wire tube 5 in parallel in the catheter direction of the catheter body 1, so that the guide wire 202 can pass through the guide wire lumen 51 of the guide wire tube 5 without occupying the area of the elongated channel 11 of the catheter body 1, so that the suction path through the guide channel 201a and the elongated channel 11 is smooth, the effective suction area is relatively large, the influence of the guide wire 202 on the effective suction area of the lumen can be avoided, and the suction effect is improved. At the same time, the guide wire 202 passing through the guide wire lumen 51 can also guide and anchor the catheter body 1, ensuring that the guide suction catheter 100 can be accurately delivered to the target area. In addition, since the guide wire 202 does not occupy the area of the elongated channel 11 of the catheter body 1, the effective suction area is relatively large, the suction capacity for large thrombus 300 is better, and the complications are reduced. Furthermore, the guide suction catheter 100 of the present application can not only be used as a guide instrument to insert deep into the blood vessel to a more distant position, but also can realize the function of thrombus 300 and plaque suction, reduce thrombotic events caused by thrombus 300 suction, reduce the exchange between instruments, and improve the operation efficiency.

[0060] The above-described embodiments are merely intended to illustrate the present application, but not to limit the scope of the present application. Any equivalent changes made in the light of the above-described embodiments should be construed as falling within the scope of the present application.

Claims

1. A guide suction catheter, characterized in that: include: a catheter body, wherein an extension channel for delivering medical devices is provided in the catheter body, and an inlet is provided at the proximal end of the catheter body and communicates with the extension channel; 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 guide suction catheter according to claim 1, characterized in that The guidewire cavity is arranged in the catheter body.

3. The guide suction catheter according to claim 1, characterized in that The distal end of the catheter body is a beveled suction port.

4. The guide suction 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.

5. The guide suction catheter according to claim 4, characterized in that: The hardness of the outer layer decreases from the proximal end to the distal end of the catheter body.

6. The guide suction catheter according to claim 1, characterized in that The distal end of the delivery member is fixed in the tube wall of the catheter body. The delivery member is provided with a through hole at a position close to the proximal end of the catheter body. The through hole is connected between the filling channel and the inner cavity of the anchoring balloon.

7. The guide suction catheter according to claim 1, characterized in that The interior of the delivery component is a hollow structure, the filling channel is formed in the hollow structure, and the distal end of the delivery component extends to a position corresponding to the anchoring balloon.

8. The guide suction catheter according to claim 1, characterized in that The introduction port of the catheter body is an oblique port structure.

9. A catheter system, characterized in that: The invention comprises a guiding catheter, a guide wire, and a guiding aspiration catheter according to any one of claims 1 to 8, wherein a guiding channel is provided in the guiding catheter, and when the anchoring balloon is not inflated, the guiding 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 filled, the anchoring balloon expands and abuts against the inner wall of the guiding channel, and the extension channel is communicated with the guiding channel.

10. The catheter system according to claim 9, wherein The guide suction catheter is inserted into the guide channel, and the distal end of the catheter body passes through the distal end of the guide channel, the proximal end of the catheter body is located in the guide channel, and the proximal end of the delivery member is located outside the proximal end of the guide channel.

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