Thrombus aspiration device

Abstract

The invention relates to a thrombus aspiration device which comprises a sheathing canal, an expansion assembly, a covering film arranged in the sheathing canal in a sleeved mode, a flexible rotary cutting assembly arranged in the covering film and a hose arranged at the end of the sheathing canal and communicated with the sheathing canal. A containing cavity used for containing the expansion assembly is formed between the inner wall covering film and the outer wall of the sheathing canal, the expansion assembly comprises a conveying device and an expansion support, the expansion support is arranged in the containing cavity, and the conveying device is used for pushing the expansion support out of the containing cavity and entering the hose; the expandable expansion stent structure is arranged on the inner wall of the elastic hose, the expansion stent can be expanded through the external connecting structure, the hose is expanded to be attached to the inner wall of a blood vessel, the inner diameter of the hose is expanded, the suction sectional area is remarkably increased through the design, and the thrombus suction efficiency is improved; meanwhile, the adaptability of the equipment to different blood vessel environments and thrombus properties is also improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a thrombus aspiration device. Background Art

[0002] In the field of medical devices, especially in the treatment of peripheral vascular diseases, removing thrombus in blood vessels is an important treatment method. With the progress of medical technology, various thrombus removal devices have been developed, including thrombus aspiration tubes. A thrombus aspiration tube is a specially designed medical device that removes thrombus by directly aspirating in blood vessels. It has the advantages of less trauma and quick recovery, and has become one of the commonly used treatment methods in clinics.

[0003] Solutions of the prior art: Existing thrombus aspiration tubes mainly break thrombus or support the aspiration tube by setting an extended stent outside the aspiration tube. The basic principle of these designs is to break thrombus physically or to expand the blood vessel by a stent to increase the aspiration cross-sectional area, thereby improving the efficiency of thrombus aspiration. In addition, there are also some technical solutions that set a rotary cutting component inside the aspiration tube to break thrombus by rotary cutting.

[0004] Problems of the prior art: Although existing thrombus aspiration tubes have solved the problem of thrombus removal to a certain extent, there are still some deficiencies. First, the existing aspiration tube design cannot effectively expand the aspiration cross-sectional area, resulting in low aspiration efficiency, easy to leave thrombus fragments, and increasing the risk of secondary blockage. Second, the existing aspiration tube needs to adjust the position of the stent multiple times during operation, increasing the operation time and risk. In addition, due to the different properties and positions of thrombus, the existing technical solutions have poor adaptability in dealing with complex vascular environments, may not be able to completely remove thrombus, and affect the treatment effect.

[0005] Therefore, how to improve the efficiency and safety of thrombus aspiration, and reduce the operation time and risk, is an urgent problem to be solved in this field currently.

[0006] To solve the above problems, the present invention provides a thrombus aspiration device. Summary of the Invention

[0007] To solve the above problems, the present invention provides a thrombus aspiration device to achieve the purpose of improving the efficiency of thrombus aspiration.

[0008] To achieve the above purpose, the present invention provides the following solutions:

[0009] A thrombus aspiration device, characterized in that it includes a sheath tube, a dilation assembly, a film sleeve arranged inside the sheath tube, a flexible rotary cutting assembly arranged inside the film, and a hose arranged at the end of the sheath tube and communicating with the sheath tube. An accommodation cavity for accommodating the dilation assembly is formed between the inner wall of the film and the outer wall of the sheath tube. Both ends of the accommodation cavity are open. The dilation assembly includes a delivery device and a dilation stent. The dilation stent is arranged inside the accommodation cavity. The delivery device is used to push the dilation stent out of the accommodation cavity and into the hose. The dilation stent expands inside the hose and fits against the inner wall of the hose. The flexible rotary cutting assembly is used to pass through the hose and reach the thrombus in the blood vessel.

[0010] Preferably, the flexible rotary cutting assembly includes an inner tube arranged inside the sheath tube, a flexible rotary cutting head arranged at one end of the inner tube, a rotary drive part arranged at the other end of the inner tube, and a movement drive part. The rotary drive part is used to drive the inner tube to rotate and drive the flexible rotary cutting head to rotate and cut. The movement drive part is used to drive the movement of the inner tube.

[0011] Preferably, a conductor channel for passing a guide wire is provided inside the inner tube.

[0012] Preferably, the flexible rotary cutting head includes two or more flexible heads arranged circumferentially and evenly along the outer wall of the inner tube.

[0013] Preferably, a plurality of barbs arranged at a predetermined angle with the flexible head are provided along the axial direction of the flexible head.

[0014] Preferably, the dilation stent includes a thin neck portion and a tapered dilation portion that are sequentially connected and integrally formed. A channel for the inner tube and the flexible rotary cutting head to pass through is provided between the thin neck portion and the tapered dilation portion.

[0015] Preferably, the delivery device includes a delivery rod and a U-shaped push rod arranged at the end of the delivery rod. The two branches of the U-shaped push rod abut against the thin neck portion. The delivery rod is used to push the U-shaped push rod and drive the dilation stent to extend out of the accommodation cavity.

[0016] Preferably, the hose is made of a medical-grade silicone material.

[0017] Preferably, a detachable aspiration joint is provided at the end of the sheath tube.

[0018] The present invention has achieved the following technical effects compared with the prior art:

[0019] 1. The existing thrombus aspiration catheter cannot effectively expand the aspiration cross-sectional area, resulting in low aspiration efficiency, easy residue of thrombus fragments, and increased risk of secondary blockage. Through the design of the extended stent, this technical solution significantly increases the aspiration cross-sectional area and improves the efficiency of thrombus aspiration.

[0020] 2. Problems of complex operation and long operation time: The existing thrombus aspiration catheter needs to adjust the position of the stent multiple times during operation, increasing the operation time and risk. Through the control of the delivery device, this technical solution has simple operation, shortens the operation time, and reduces the operation risk.

[0021] 3. Problem of poor adaptability: Due to the different properties and positions of thrombi, the existing technical solutions have poor adaptability in dealing with complex vascular environments, may not be able to completely remove thrombi, and affect the treatment effect. Through the entanglement of the flexible rotary cutting head with the thrombus, this technical solution ensures that the thrombus is completely removed and reduces the risk of residue.

[0022] 4. Safety problem: The existing thrombus aspiration catheter may cause damage to the inner wall of the blood vessel during operation, increasing the risk of complications. Through the design of the elastic hose, this technical solution ensures the stability of the aspiration catheter in the blood vessel and reduces the damage to the inner wall of the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Attached Figure 1 is a schematic structural diagram of the present invention;

[0025] Attached Figure 2 is a schematic structural diagram of the flexible rotary cutting assembly of the present invention;

[0026] Attached Figure 3 is a schematic structural diagram of the expansion stent of the present invention;

[0027] Attached Figure 4 is a schematic diagram of the cooperation between the delivery device and the expansion stent of the present invention;

[0028] Among them, 1, sheath tube; 2, hose; 3, expansion stent; 4, flexible rotary cutting assembly; 5, inner tube; 6, thin neck; 7, conical expansion part; 8, channel; 9, delivery rod; 10, U-shaped push rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 without creative work are within the scope of protection of the present invention.

[0030] In order to solve the above problems, the present invention provides a thrombus aspiration device to achieve the purpose of improving the thrombus aspiration efficiency.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] refer to Figures 1 to 4 , a thrombus aspiration device, characterized in that it includes a sheath tube, an expansion component, a coating arranged in the sheath tube, a flexible rotary cutting component arranged in the coating, and a hose arranged at the end of the sheath tube and connected to the sheath tube, a receiving cavity for receiving the expansion component is formed between the inner wall coating and the outer wall of the sheath tube, and both ends of the receiving cavity are open, the expansion component includes a conveying device and an expansion stent, the expansion stent is arranged in the receiving cavity, the conveying device is used to push the expansion stent out of the receiving cavity and into the hose, the expansion stent is expanded in the hose and fits the inner wall of the hose, and the flexible rotary cutting component is used to pass through the hose and enter the thrombus in the blood vessel; the present invention is provided with an expandable expansion stent structure on the inner wall of the elastic hose, and the expansion stent can be expanded through the external connection structure, so that the hose is opened and fits on the inner wall of the blood vessel and the inner diameter of the hose is expanded. This design significantly increases the suction cross-sectional area, improves the efficiency of thrombus aspiration, and also improves the adaptability of the device to different vascular environments and thrombus properties.

[0033] refer to Figure 2 The flexible peeling assembly includes an inner tube arranged in the sheath tube, a flexible peeling head arranged at one end of the inner tube, a rotation driving unit and a moving driving unit arranged at the other end of the inner tube. The rotation driving unit is used to drive the inner tube to rotate and drive the flexible peeling head to rotate and cut, and the moving driving unit is used to drive the movement of the inner tube.

[0034] refer to Figure 2 The flexible rotary cutting head includes two or more flexible heads arranged along the circumference of the outer wall of the inner tube.

[0035] refer to Figure 2 The flexible head is provided with a plurality of barbs arranged at a predetermined angle with the flexible head along its axial direction.

[0036] Furthermore, a conductor channel for passing a guide wire is provided inside the inner tube.

[0037] Reference Figure 3 , the dilation stent includes a thin neck portion and a tapered dilation portion that are sequentially connected and integrally formed, and a channel for the inner tube and the flexible cutting head to pass through is provided between the thin neck portion and the tapered dilation portion.

[0038] Furthermore, the delivery device includes a delivery tube and a drive rod disposed inside the delivery tube. The dilation stent is disposed at the end of the delivery rod. The drive rod is used to expand the dilation stent and fit it against the inner wall of the hose. After expansion, the outer diameter of the tapered dilation portion is greater than the outer diameter of the hose.

[0039] Reference Figure 4 , the delivery device includes a delivery rod and a U-shaped push rod disposed at the end of the delivery rod. The two branches of the U-shaped push rod are in contact with the thin neck portion. The delivery rod is used to push the U-shaped push rod and drive the dilation stent to extend out of the accommodation cavity.

[0040] Furthermore, the hose is made of a medical-grade silicone material with good elasticity and biocompatibility.

[0041] Furthermore, a detachable suction joint is provided at the end of the sheath tube.

[0042] The usage method of the thrombus aspiration device of the present invention is as follows:

[0043] First, move the sheath tube to the designated position, which is generally close to the thrombus. The dilation stent is pushed against the thin neck portion of the dilation stent by the U-shaped push rod at the end of the delivery rod. The dilation stent gradually extends out of the accommodation cavity and enters the hose. The dilation stent is released and expands in the hose to fit against the inner wall of the hose, driving the hose to expand. After the expansion is completed, start the mobile drive unit. The inner tube drives the flexible cutting head through the channel and the hose to reach the thrombus position. Start the rotary drive unit. The rotary drive unit is used to drive the inner tube to rotate and drive the flexible cutting head to rotate and cut. While cutting, the suction tube can aspirate the thrombus with the suction surface of the largest interface. The flexible cutting head can also entangle with the thrombus, bring it into the sheath tube together and aspirate it out of the body.

[0044] Adaptations made according to actual needs are within the protection scope of the present invention.

[0045] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A thrombus aspiration device, characterized in that: The invention comprises a sheath tube, an expansion component, a coating arranged inside the sheath tube, a flexible rotary cutting component arranged inside the coating, and a hose arranged at the end of the sheath tube and connected with the sheath tube, a receiving cavity for receiving the expansion component is formed between the inner wall coating and the outer wall of the sheath tube, and both ends of the receiving cavity are open, the expansion component comprises a conveying device and an expansion stent, the expansion stent is arranged in the receiving cavity, the conveying device is used to push the expansion stent out of the receiving cavity and into the hose, the expansion stent expands inside the hose and adheres to the inner wall of the hose, and the flexible rotary cutting component is used to pass through the hose and enter the thrombus in the blood vessel.

2. The thrombus aspiration device according to claim 1, characterized in that: The flexible peeling assembly includes an inner tube arranged in the sheath tube, a flexible peeling head arranged at one end of the inner tube, a rotating drive unit and a moving drive unit arranged at the other end of the inner tube. The rotating drive unit is used to drive the inner tube to rotate and drive the flexible peeling head to rotate and cut, and the moving drive unit is used to drive the movement of the inner tube.

3. The thrombus aspiration device according to claim 2, characterized in that: The inner tube is provided with a conductor channel for passing a guide wire.

4. The thrombus aspiration device according to claim 2, characterized in that: The flexible rotary cutting head includes two or more flexible heads arranged along the circumference of the outer wall of the inner tube.

5. The thrombus aspiration device according to claim 4, characterized in that: The flexible head is provided with a plurality of barbs arranged at a predetermined angle with the flexible head along the axial direction thereof.

6. The thrombus aspiration device according to claim 4, characterized in that: The expandable stent comprises a thin neck portion and a tapered expansion portion which are connected in sequence and formed integrally, and a channel for the inner tube and the flexible rotary cutting head to pass through is arranged between the thin neck portion and the tapered expansion portion.

7. The thrombus aspiration device according to claim 6, characterized in that: The conveying device includes a conveying rod and a U-shaped push rod arranged at the end of the conveying rod, two support rods of the U-shaped push rod abut against the thin neck, and the conveying rod is used to push the U-shaped push rod and drive the expansion stent to extend out of the accommodating cavity.

8. The thrombus aspiration device according to claim 1, characterized in that: The hose is made of medical grade silicone material.

9. The thrombus aspiration device according to claim 1, characterized in that: The end of the sheath tube is provided with a detachable suction joint.

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