Integrated plugging balloon suction catheter

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to an integrated plugging balloon suction catheter. The suction catheter comprises a woven mesh tube, the near end of the woven mesh tube is connected with a handle, and the far end opening of the woven mesh tube is used for being close to the thrombus position; the balloon is arranged on the periphery of the woven mesh tube in a sleeving mode, and the balloon is arranged at the far end of the woven mesh tube; the handle comprises a catheter suction port and a filling port, the catheter suction port is communicated with the far port of the woven mesh tube, and the filling port is communicated with the balloon. The aspiration catheter can effectively reduce the occurrence rate of thrombus escape, so that the risk of far-end embolism is reduced, and good prognosis of a patient is achieved through efficient thrombus extraction; and the extra cost of using other instruments can be reduced, so that the comprehensive cost of the operation is reduced, the thrombus extraction success rate is greatly improved, manpower and material resources are saved, and a patient is benefited.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical devices, and particularly relates to an integrated occlusion balloon suction catheter. BACKGROUND

[0002] For those patients who have acute ischemic stroke, after the cerebral blood vessels are blocked by thrombus, how to quickly remove the thrombus first, so that the blood supply of the brain tissue can be restored as soon as possible, and the scope and severity of cerebral infarction are reduced, mechanical thrombectomy has become an effective treatment method. Mechanical thrombectomy mainly has stent thrombectomy and catheter suction, but both of them have different shortcomings.

[0003] Stent thrombectomy: the stent must pass through the thrombus, and potential thrombus fragmentation; the thrombus is dragged, and potential thrombus fragmentation; generally, 1-6 times are needed to remove the thrombus; the blood vessel is easily damaged, causing pain; the first recanalization rate (FPE) is less than 30%; 24% of thrombectomy operations need other instruments for auxiliary rescue.

[0004] Catheter suction: the thrombus is dragged, and potential thrombus fragmentation; generally, 1-6 times are needed to remove the thrombus; the first recanalization rate (FPE) is less than 30%; 33% of thrombectomy operations need other instruments for auxiliary rescue.

[0005] How to avoid the disadvantages of the current two thrombectomy technologies is a problem that needs to be solved in the current interventional operation. Especially in the thrombectomy process, the broken thrombus flows to the deep intracranial blood vessels along with the blood flow, causing secondary damage to the patient.

[0006] Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies of the prior art. SUMMARY

[0007] The purpose of the present application is to provide an integrated occlusion balloon suction catheter to at least solve the above-mentioned problems existing in the prior art.

[0008] In order to achieve the above-mentioned purpose, the present application provides the following technical solution:

[0009] An integrated occlusion balloon suction catheter, the suction catheter comprises:

[0010] A braided mesh tube, a proximal end of the braided mesh tube is connected with a handle, and a distal end port of the braided mesh tube is used to be close to a thrombus position;

[0011] A balloon, the balloon is sleeved on the periphery of the braided mesh tube, and the balloon is arranged at the distal end of the braided mesh tube;

[0012] The handle comprises a catheter suction port and a filling port, the catheter suction port communicates with the distal end port of the braided mesh tube, and the filling port communicates with the balloon.

[0013] The integrated occlusion balloon suction catheter as described above, preferably, the outer tube is sleeved on the periphery of the braided mesh tube between the balloon and the handle.

[0014] The integrated occlusion balloon suction catheter as described above, preferably, at least one inflation channel is arranged in the outer tube, and two ends of the inflation channel are respectively communicated with the inflation ports in the balloon and the handle.

[0015] The integrated occlusion balloon suction catheter as described above, preferably, the balloon is made of a high polymer material.

[0016] The integrated occlusion balloon suction catheter as described above, preferably, the outer tube is made of a high polymer material, and the outer tube is fixed on the periphery of the braided mesh tube through heat shrinkage.

[0017] The integrated occlusion balloon suction catheter as described above, preferably, a developing ring is arranged near the distal end port of the braided mesh tube, and developing rings are arranged near the distal end and the proximal end of the braided mesh tube near the balloon.

[0018] The integrated occlusion balloon suction catheter as described above, preferably, the braided mesh tube has a three-layer structure, including an inner layer, an intermediate reinforcing layer and an outer layer.

[0019] The integrated occlusion balloon suction catheter as described above, preferably, the inner layer is made of a polytetrafluoroethylene material.

[0020] The integrated occlusion balloon suction catheter as described above, preferably, the intermediate reinforcing layer is made of a metal wire.

[0021] The integrated occlusion balloon suction catheter as described above, preferably, the outer layer is made of a high polymer material.

[0022] Beneficial effects:

[0023] In the suction catheter, the balloon is arranged to occlude in the blood vessel, so that the blood flow speed near the thrombus is reduced, which can effectively prevent the thrombus from escaping with the blood flow during the thrombectomy process, thereby improving the first thrombectomy success rate, reducing the interventional operation time and the difficulty of doctor's operation, reducing the risk of various complications during the operation, improving the operation success rate, and reducing the patient's pain.

[0024] That is, the balloon-equipped suction catheter in this application blocks the proximal blood flow to a certain extent, reduces the impact of the proximal blood flow on the thrombus, effectively reduces the incidence of thrombus escape, and thus reduces the risk of distal embolism. The efficient thrombectomy also achieves a good prognosis for the patient; and not only can it reduce the additional cost of using other instruments, thereby reducing the overall cost of the operation, but it also greatly improves the success rate of thrombectomy, saves manpower and material resources, and benefits patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings and the accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them:

[0026] Figure 1 This is a schematic structural diagram of an integrated occlusion balloon aspiration catheter according to an embodiment of the present invention;

[0027] Figure 2 A partially enlarged view of a suction catheter according to an embodiment of the present invention;

[0028] Figure 3 for Figure 1 Middle AA cross-section;

[0029] Figure 4 for Figure 1 Middle BB cross-section;

[0030] Figure 5 for Figure 1 Middle CC cross-section.

[0031] In the figure: 1. Balloon; 2. Outer tube; 21. Filling channel; 3. Braided mesh tube; 31. Inner layer; 32. Middle reinforcement layer; 33. Outer layer; 4. Development ring; 5. Stress diffusion tube; 6. Handle; 61. Catheter suction port; 62. Filling port. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0033] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0035] According to a specific embodiment of the present invention, Figures 1-5 As shown, the present invention provides an integrated occlusion balloon aspiration catheter, the aspiration catheter comprising:

[0036] The braided mesh tube 3 has a handle 6 connected to its proximal end, and a distal end of the braided mesh tube 3 is used to approach the thrombus position.

[0037] The balloon 1 is sleeved on the periphery of the braided mesh tube 3 , and the balloon 1 is arranged at the distal end of the braided mesh tube 3 .

[0038] The handle 6 includes a catheter suction port 61 and a filling port 62 . The catheter suction port 61 is communicated with the distal end of the braided mesh tube 3 , and the filling port 62 is communicated with the balloon 1 .

[0039] When the suction catheter is used for thrombectomy, the distal end of the braided mesh tube 3 is first delivered to the thrombus attachment, and then the filling fluid is filled into the balloon 1 through the filling port 62. The balloon 1 expands under the action of the liquid and blocks the blood vessel. Then, negative pressure is applied through the catheter suction port 61 to generate negative pressure at the distal end of the braided mesh tube 3 to aspirate the thrombus; or a thrombectomy stent is inserted from the catheter suction port 61, and the thrombectomy stent is extended from the distal end of the braided mesh tube 3 to remove the thrombus.

[0040] During the above-mentioned thrombectomy process, since the balloon 1 is blocked in the blood vessel, the blood flow velocity near the thrombus is reduced, which can effectively prevent the thrombus from escaping with the blood flow during the thrombectomy process, thereby improving the success rate of the first thrombectomy, reducing the interventional surgery time and the difficulty of the doctor's operation. At the same time, it can also reduce the risk of various complications during the operation, improve the success rate of the operation, and alleviate the patient's pain.

[0041] That is, the application sets the aspiration catheter of the balloon 1 to block the proximal blood flow to a certain extent, reduce the impact of the proximal blood flow on the thrombus, effectively reduce the incidence of thrombus escape, thereby reducing the risk of distal embolization, and high-efficiency thrombectomy also achieves good prognosis of the patient; not only can reduce the additional cost of using other instruments, thereby reducing the comprehensive cost of the operation, but also greatly improves the success rate of thrombectomy, saves manpower and material resources, and benefits the patients.

[0042] The aspiration catheter further comprises an outer tube 2, which is sleeved on the outer periphery of the braided mesh tube 3 between the balloon 1 and the handle 6.

[0043] In the embodiment, the outer tube 2 can protect the braided mesh tube 3 by being sleeved on the outer periphery of the braided mesh tube 3.

[0044] The outer tube 2 is provided with at least one inflation channel 21, and the two ends of the inflation channel 21 are respectively communicated with the inflation port 62 in the balloon 1 and the handle 6.

[0045] In the embodiment, the inflation liquid enters the inflation channel 21 from the inflation port 62 and enters the balloon 1 through the inflation channel 21; since the inflation channel 21 is arranged in the outer tube 2, the inflation channel 21 does not occupy the space of the braided mesh tube 3, which not only makes the braided mesh tube 3 have better structural strength, but also ensures that the thrombectomy operation in the braided mesh tube 3 and the inflation of the inflation channel 21 with the inflation liquid do not affect each other.

[0046] In the embodiment, two inflation channels 21 are symmetrically arranged on the outer tube 2; in other embodiments, 1, 3, 4, 5 or other numbers of inflation channels 21 can be arranged in the outer tube 2, and different numbers of inflation channels 21 can be arranged in the outer tube 2 according to the demand of the inflation liquid filling rate.

[0047] The balloon 1 is made of a high polymer material.

[0048] In the embodiment, the balloon 1 can be made of a high polymer material such as silicone or TPU.

[0049] The outer tube 2 is made of a high polymer material, and the outer tube 2 is fixed on the outer periphery of the braided mesh tube 3 by heat shrinking. In the embodiment, the outer tube 2 can also be made of a high polymer material such as silicone or TPU, and the outer tube 2 has a single-layer structure; the outer tube 2 is fixed on the outer periphery of the braided mesh tube 3 by heat shrinking, which not only makes the fixing method more convenient, but also realizes the firm combination of the outer tube 2 and the braided mesh tube 3.

[0050] The distal end of the braided mesh tube 3 is provided with a developing ring 4, and the developing ring 4 is arranged at the position close to the distal end and the proximal end of the balloon 1 on the braided mesh tube 3.

[0051] In the embodiment, the developing ring 4 is arranged near the distal end of the braided mesh tube 3 to facilitate observation of the position of the distal end of the braided mesh tube 3, so that the distal end of the braided mesh tube 3 can be more accurately sent to the thrombus position. The developing ring 4 is arranged on the braided mesh tube 3 at positions corresponding to the distal end and the proximal end of the balloon 1 to facilitate real-time observation of the position of the balloon 1.

[0052] In the embodiment, the developing ring 4 is composed of a developing metal such as platinum-tungsten or platinum-iridium.

[0053] The braided mesh tube 3 has a three-layer structure, including an inner layer 31, a middle reinforcing layer 32 and an outer layer 33.

[0054] The inner layer 31 is made of polytetrafluoroethylene material.

[0055] The middle reinforcing layer 32 is made of metal wires. In the embodiment, the middle reinforcing layer 32 is made of metal wires such as stainless steel wires or nickel-titanium wires by braiding or winding.

[0056] The outer layer 33 is made of a high polymer material. In the embodiment, the outer layer can be made of a high polymer material such as silicone or TPU.

[0057] In the embodiment, the balloon 1 is adhesively connected with the outer layer tube 2 and the inner layer 31 by a glue process.

[0058] In the embodiment, a stress diffusion tube 5 can also be arranged at the distal end of the handle 6, and the stress diffusion tube 5 is composed of a high polymer material such as polyolefin.

[0059] It can be understood that the above description is only exemplary, and the embodiments of the application are not limited thereto.

[0060] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application is within the scope of protection of the claims of the application.

Claims

1. An integrated occlusion balloon aspiration catheter, characterized in that: The suction catheter comprises: A braided mesh tube, wherein the proximal end of the braided mesh tube is connected to a handle, and the distal end of the braided mesh tube is used to approach the location of the thrombus; A balloon, wherein the balloon is sheathed on the periphery of the braided mesh tube and is arranged at the distal end of the braided mesh tube; The handle comprises a catheter suction port and a filling port, wherein the catheter suction port is communicated with the distal end of the braided mesh tube, and the filling port is communicated with the balloon.

2. The integrated occlusion balloon aspiration catheter according to claim 1, characterized in that: The suction catheter further comprises an outer tube, which is sleeved on the periphery of the braided mesh tube between the balloon and the handle.

3. The integrated occlusion balloon aspiration catheter according to claim 2, characterized in that: At least one filling channel is provided in the outer tube, and two ends of the filling channel are respectively connected to the balloon and the filling port in the handle.

4. The integrated occlusion balloon aspiration catheter according to claim 3, characterized in that: The balloon is made of polymer material.

5. The integrated occlusion balloon aspiration catheter according to claim 4, characterized in that: The outer tube is made of polymer material and is fixed to the periphery of the braided mesh tube by heat shrinkage.

6. The integrated occlusion balloon aspiration catheter according to claim 1, characterized in that: A developing ring is provided near the distal end of the braided mesh tube, and developing rings are provided at both the distal end and the proximal end of the braided mesh tube close to the balloon.

7. The integrated occlusion balloon aspiration catheter according to claim 2, characterized in that: The braided mesh tube has a three-layer structure, including an inner layer, a middle reinforcement layer and an outer layer.

8. The integrated occlusion balloon aspiration catheter according to claim 7, characterized in that: The inner layer is made of polytetrafluoroethylene.

9. The integrated occlusion balloon aspiration catheter according to claim 7, characterized in that: The middle reinforcement layer is made of metal wire.

10. The integrated occlusion balloon aspiration catheter according to claim 7, characterized in that: The outer layer is made of polymer material.

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