CN219185172U

CN219185172U - Thrombus aspiration catheter

Info

Publication number: CN219185172U
Application number: CN202320565338.6U
Authority: CN
Inventors: 黄文静; 王燕球; 雷珍; 陆杰进
Original assignee: Nanning Tecbod Biotechnology Co ltd
Current assignee: Nanning Tecbod Biotechnology Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-06-16
Anticipated expiration: 2033-03-22

Abstract

The utility model discloses a thrombus aspiration catheter, which comprises an aspiration tube, a high-pressure saline tube, a wire guide tube, a guide wire, a thrombus breaking knife, an umbrella-shaped enclosing shield and an end connector, wherein a wire guide cavity is arranged in the wire guide tube, the guide wire can penetrate through the wire guide cavity, the wire guide tube and the high-pressure saline tube are sleeved in the aspiration tube, an aspiration cavity is formed between the aspiration tube and the wire guide tube, the umbrella-shaped enclosing shield is arranged on the wire guide tube and can extend out of the inner end of the aspiration tube along with the movement of the wire guide tube and is contacted with the vessel wall, the thrombus breaking knife is arranged on the wire guide tube and is positioned on the inner side of the umbrella-shaped enclosing shield, the high-pressure saline tube is arranged on the side wall of the wire guide tube, and the outer ends of the wire guide tube, the high-pressure saline tube and the aspiration tube are connected with a negative pressure aspiration device through the end connector. The utility model can avoid the influence of the adherence of the guide wire in the suction pipe on the suction effect, can fully crush the thrombus blocks by arranging the thrombus crushing knife, avoid the overlarge suction of the thrombus blocks from being unsmooth, is beneficial to thrombus delivery, and can block the diffusion path of the thrombus by the umbrella-shaped fence to avoid complications.

Description

Thrombus aspiration catheter

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a thrombus aspiration catheter.

Background

Thrombus is a small block of blood flow formed on the surface of the inside surface of a cardiovascular system vessel where it is exfoliated or repaired. In variable fluid dependency (variable), the thrombus consists of insoluble fibrin, deposited platelets, accumulated white blood cells and entrapped red blood cells. The blood vessel of the human body is usually blocked by the existence of thrombus, so that local tissues form tissue necrosis due to ischemia, and life-threatening diseases such as myocardial infarction, cerebral apoplexy and the like are easily caused, thereby greatly affecting the health of the human body.

At present, a relatively common artificial mechanical method for recovering vascular patency in clinic is thrombus aspiration, which is mainly used for introducing a thrombus aspiration catheter into a human blood vessel to extract thrombus which forms an occlusion in the human blood vessel. The treatment rate of recanalizing blood vessels using thrombi aspiration is high, however, existing thrombi aspiration still have many drawbacks.

The existing thrombus aspiration catheter generally adopts a double-cavity tube, the inner cavity of the catheter is used for drawing thrombus through a guide wire, and the outer cavity of the catheter is used for drawing thrombus, so that the thrombus can be diffused in the distal direction and even in the proximal direction, complications are easy to cause, and the risk of operation is increased.

Disclosure of Invention

The utility model aims to provide a thrombus suction catheter, which solves the problems in the prior art, reduces thrombus diffusion and improves the cleaning effect of thrombus.

In order to achieve the above object, the present utility model provides the following solutions:

the utility model provides a thrombus aspiration catheter which comprises an aspiration tube, a high-pressure saline tube, a wire guide tube, a guide wire, a thrombus breaking knife, an umbrella-shaped fence and an end connector, wherein a wire guide cavity is formed in the wire guide tube, the guide wire can penetrate through the wire guide cavity, the wire guide tube and the high-pressure saline tube are sleeved in the aspiration tube, an aspiration cavity is formed between the aspiration tube and the wire guide tube, the umbrella-shaped fence is arranged on the wire guide tube and can extend out of the inner end of the aspiration tube along with the movement of the wire guide tube and is contacted with a vessel wall, the thrombus breaking knife is arranged on the wire guide tube and is positioned on the inner side of the umbrella-shaped fence, and the wire guide tube, the high-pressure saline tube and the outer end of the aspiration tube are connected with a negative pressure aspiration device through the end connector.

Preferably, a filter screen is arranged at the tail end of the guide wire, one end of the filter screen is fixed with the tail end of the guide wire, the other end of the filter screen is sleeved on the guide wire in a sliding manner, the filter screen is a net-shaped braided fabric, the net-shaped braided fabric can be deformed into a sphere in a tubular shape when being extruded by the guide wire tube, and the spherical filter screen can be contacted with the blood vessel wall.

Preferably, the bolt breaking knife comprises a collar, a breaking knife and a protective shell, wherein the collar is fixedly arranged on the wire guide tube, the breaking knife is rotatably arranged on the collar, the breaking knife is positioned in the protective shell, and the protective shell and the wire guide tube are integrated.

Preferably, the protective housing is cone-shaped and is provided with an overflow hole, and the crushing knife is 1mm away from the port of the protective housing.

Preferably, the high-pressure brine pipe is provided with two water outlet ends, one water outlet end is obliquely arranged on the protective shell, the other water outlet end is axially arranged along the guide wire pipe, and the high-pressure physiological brine sprayed in the high-pressure brine pipe can enable the crushing cutter to rotate.

Preferably, the root of the umbrella-shaped enclosing shield is fixed on the guide wire tube, the umbrella surface is provided with an overflow hole matched with the suction cavity, and the umbrella surface is made of a flexible material capable of gathering and is contacted with the blood vessel wall after being unfolded.

Preferably, the length of the guide wire tube between the thrombus breaking knife and the filter screen is at least half of the thrombus length, and can be adjusted according to the thrombus length.

Preferably, an elastic tube is seamlessly connected to the inner end of the suction tube, the elastic tube is made of polyurethane material, and the outer surface of the elastic tube is provided with a hydrophilic coating.

Compared with the prior art, the utility model has the following technical effects:

the thrombus suction catheter with the double-cavity mechanism can prevent the guide wire from adhering to the wall in the suction pipe to influence the suction effect, can fully crush thrombus blocks by arranging the thrombus crushing knife, prevents the thrombus blocks from excessively large suction and being unsmooth, is beneficial to thrombus conveying, and can prevent the diffusion path of thrombus from being blocked by the umbrella-shaped fence to avoid complications.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing the structure of a thrombus aspiration catheter according to the present utility model in its use state;

FIG. 2 is a schematic view showing a collapsed state of the thrombus aspiration catheter of the present utility model;

FIG. 3 is a schematic structural view of a bolt cutter according to the present utility model;

FIG. 4 is a schematic view of the umbrella-shaped enclosure of the present utility model;

wherein: 1-suction pipe, 2-high-pressure brine pipe, 3-wire guide pipe, 4-wire guide, 5-umbrella-shaped surrounding baffle, 6-end connector, 7-filter screen, 8-collar, 9-crushing knife, 10-protective shell and 11-elastic pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to fall within the scope of the utility model.

The utility model aims to provide a thrombus suction catheter, which solves the problems existing in the prior art, reduces thrombus diffusion and improves the cleaning effect of thrombus.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

As shown in fig. 1 to 4: the embodiment provides a thrombus aspiration catheter, including suction tube 1, high-pressure salt water pipe 2, wire guide pipe 3, seal wire 4, garrulous bolt sword, umbrella-type encloses fender 5 and tip joint 6, be provided with the seal wire chamber in the wire guide pipe 3, wire guide 4 can run through the seal wire chamber, wire guide pipe 3, in the suction tube 1 is all located to high-pressure salt water pipe 2 cover, form the suction chamber between suction tube 1 and the wire guide pipe 3, umbrella-type encloses fender 5 and sets up on wire guide pipe 3 and can stretch out the inner of suction tube 1 and contact with the vascular wall along with the removal of wire guide pipe 3, be provided with garrulous bolt sword on the wire guide pipe 3 and be located the inboard that umbrella-type encloses fender 5, high-pressure salt water pipe 2 sets up on the lateral wall of wire guide pipe 3, the outer end of wire guide pipe 3, high-pressure salt water pipe 2 and suction tube 1 is connected with negative pressure aspiration device through tip joint 6.

The end of the guide wire 4 is provided with a filter screen 7, one end of the filter screen 7 is fixed with the end of the guide wire 4, the other end of the filter screen 7 is sleeved on the guide wire 4 in a sliding way, the filter screen 7 is a net-shaped braided fabric, the net-shaped braided fabric can be deformed into a sphere in a tubular shape when extruded by the guide wire tube 3, and the spherical filter screen 7 can be contacted with the wall of a blood vessel. The length of the guide wire tube 3 between the thrombus crushing cutter and the filter screen 7 is at least half of the thrombus length, and can be adjusted according to the thrombus length. Preferably, in this embodiment, when the thrombus cleaning is started, the thrombus breaking knife is positioned at one end of the thrombus, the filter screen 7 is positioned at the other end of the thrombus, along with the pushing of the guide wire tube 3, the thrombus breaking knife starts to clean the thrombus, when the thrombus breaking knife cleans to half the length of the thrombus, the filter screen 7 starts to be extruded, and when the thrombus breaking knife cleans the thrombus, the filter screen 7 must be deformed completely, and the thrombus can be intercepted by the filter screen 7, so that the distal diffusion of the thrombus can be avoided.

The bolt breaking knife comprises a shaft collar 8, a breaking knife 9 and a protective shell 10, wherein the shaft collar 8 is fixedly arranged on the wire guide tube 3, the breaking knife 9 is rotationally arranged on the shaft collar 8, the breaking knife 9 is positioned in the protective shell 10, the protective shell 10 and the wire guide tube 3 are integrated, and the protective shell 10 can prevent the breaking knife 9 from directly contacting the blood vessel wall to cause injury. The protective housing 10 is awl bucket type and is provided with the overflow hole, and broken sword 9 is 1mm apart from protective housing 10 port, can avoid broken sword 9 to expose, can be convenient for break sword 9 stretch into in the thrombus again and break, the transport of thrombus of being convenient for. The high-pressure saline pipe 2 is provided with two water outlets, one water outlet is obliquely arranged on the protective shell 10, the other water outlet is axially arranged along the guide wire pipe 3, and the high-pressure saline sprayed in the high-pressure saline pipe 2 can provide power for the crushing knife 9 to rotate on one hand, and can flush residual thrombus on the blood vessel wall on the other hand, so that the thrombus cleaning effect is improved.

The root of umbrella-shaped fence 5 is fixed on wire guide tube 3, be provided with on the umbrella face with suction chamber assorted overflow hole, the thrombus sediment of being convenient for circulate, the umbrella face is the flexible material that can gather together and prop up after prop up and contact with the vascular wall, forms the fence that the thrombus was backward flow, avoids the diffusion, improves thrombus clearance effect.

The inner end of the suction tube 1 is connected with an elastic tube 11 in a seamless mode, the elastic tube 11 is made of polyurethane materials, a hydrophilic coating is arranged on the outer surface of the elastic tube 11, and the elastic tube 11 has a certain deformation capability, so that the suction tube 1 has good compliance and trafficability, and the conveying efficiency and the conveying effect of the suction tube are improved.

The specific working principle of the thrombus aspiration catheter of this embodiment is as follows: when the thrombus is sucked, firstly, the skin is punctured to put the catheter into a vessel for forming the thrombus, the pushing is stopped when the suction tube 1 reaches the thrombus, the guide wire 4 is continuously pushed forward until the umbrella-shaped baffle 5 is completely separated from the suction tube 1, at the moment, the inner end of the guide wire 4 is positioned in a thrombus block, the whole guide wire is pushed forward until the breaking knife 9 contacts the thrombus, the thrombus cleaning is started, the pulse pressure is generated by the driving pump to inject physiological saline through the high-pressure saline pipe 2, the breaking knife 9 rotates to break the thrombus, meanwhile, the physiological saline is sprayed from the end part of the suction tube 1 to flush the thrombus, the high-speed physiological saline generates a local low-pressure area, broken thrombus particles are discharged through the suction cavity, meanwhile, the negative pressure of the negative pressure suction device can be used for extracting the thrombus after breaking in the vessel, when the thrombus is about to clear up the through holes, the guide wire 4 is pulled, the filter screen 7 forms a distal end filtering baffle to avoid the thrombus from flowing away, the guide wire 3 is continuously pushed for a small distance until the thrombus block is clear up, after the thrombus in the suction tube 1 is waited for completely pumping the thrombus in the vessel, the thrombus is removed from the vessel, the vessel is hemostatic, so that the thrombus is removed, and the thrombus is removed.

The principles and embodiments of the present utility model have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present utility model and its core ideas; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. A thrombus aspiration catheter, characterized in that: including suction tube, high-pressure brine pipe, seal wire, garrulous bolt sword, umbrella-shaped fender and tip connect, be provided with the seal wire chamber in the seal wire pipe, the seal wire can run through the seal wire chamber, the seal wire pipe the high-pressure brine pipe all overlaps to be located in the suction tube, the suction tube with form the suction chamber between the seal wire pipe, the umbrella-shaped fender set up in on the seal wire pipe and can follow the removal of seal wire pipe stretches out the inner of suction tube and contacts with the vascular wall, be provided with garrulous bolt sword on the seal wire pipe and be located the umbrella-shaped inboard of enclosing the fender, the high-pressure brine pipe set up in on the lateral wall of seal wire pipe, the seal wire pipe the high-pressure brine pipe with the outer end of suction tube is passed through the tip connects and is connected with negative pressure suction device.

2. The thrombus aspiration catheter according to claim 1, wherein: the end of the guide wire is provided with a filter screen, one end of the filter screen is fixed with the end of the guide wire, the other end of the filter screen is sleeved on the guide wire in a sliding mode, the filter screen is a net-shaped braided fabric, the net-shaped braided fabric can be deformed into a sphere in a tubular mode when being extruded by the guide wire tube, and the spherical filter screen can be contacted with the blood vessel wall.

3. The thrombus aspiration catheter according to claim 2, wherein: the bolt breaking knife comprises a shaft collar, a breaking knife and a protective shell, wherein the shaft collar is fixedly arranged on the wire guide tube, the breaking knife is rotatably arranged on the shaft collar, the breaking knife is positioned in the protective shell, and the protective shell and the wire guide tube are integrated.

4. A thrombus aspiration catheter according to claim 3, wherein: the protective housing is awl fill type and is provided with the overflow hole, broken sword distance protective housing port 1mm.

5. A thrombus aspiration catheter according to claim 3, wherein: the high-pressure brine pipe is provided with two water outlet ends, one water outlet end is obliquely arranged on the protective shell, the other water outlet end is arranged along the axial direction of the guide wire pipe, and the high-pressure physiological saline water sprayed in the high-pressure brine pipe can enable the crushing cutter to rotate.

6. A thrombus aspiration catheter according to claim 3, wherein: the root of the umbrella-shaped enclosing shield is fixed on the guide wire pipe, the umbrella surface is provided with an overflow hole matched with the suction cavity, and the umbrella surface is made of a flexible material capable of gathering and is contacted with the blood vessel wall after being unfolded.

7. A thrombus aspiration catheter according to claim 3, wherein: the length of the guide wire tube between the thrombus breaking knife and the filter screen is at least half of the length of thrombus, and can be adjusted according to the length of thrombus.

8. The thrombus aspiration catheter according to claim 1, wherein: the inner end of the suction tube is connected with an elastic tube in a seamless mode, the elastic tube is made of polyurethane materials, and the outer surface of the elastic tube is provided with a hydrophilic coating.