Vascular intervention microcatheter

Abstract

The utility model discloses a vascular intervention micro catheter, and relates to the technical field of medical instruments. The vascular intervention micro-catheter comprises an outer-layer catheter and is characterized in that a positioning tube is fixedly connected to the interior of the outer-layer catheter, an inner-layer catheter is fixedly connected to the side, away from the outer-layer catheter, of the positioning tube, one end of the outer-layer catheter is fixedly connected with a limiting plate, and the limiting plate is arranged outside the inner-layer catheter; an expansion layer is fixedly connected to the end, away from the outer-layer catheter body, of the limiting plate and arranged outside the inner-layer catheter body, the inner-layer catheter body and the expansion layer are separated through the positioning pipe, gas can be injected into the space between the expansion layer and the inner-layer catheter body through the gas guide pipe at the moment, and the expansion layer can drive the grid sleeve to expand at the moment; at the moment, the blocked position in the blood vessel can be preliminarily cleaned, the effect of cleaning the inner wall of the blood vessel is achieved, the problem that the inner wall of the blood vessel is damaged due to the fact that a single-layer structure is adopted to conduct scraping step by step in the past is solved, and using safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely is a kind of vascular intervention microcatheter. BACKGROUND

[0002] Medical instrument refers to the instrument, equipment, appliance, in-vitro diagnostic reagent and calibrant, material and other similar or related articles for human body directly or indirectly, including the computer software needed, medical instrument includes medical equipment and medical consumables, and when cardiovascular and cerebrovascular disease, need to use microcatheter to carry out intervention treatment.

[0003] According to the vascular intervention microcatheter of Chinese patent announcement No. CN220293976U, the microcatheter is inserted into the catheter seat, and the auxiliary positioning tube is provided on the top surface of the microcatheter, and the expansion tube is integrally formed on the surface of the auxiliary positioning tube. A plurality of groups of air bags are formed between the inside of the auxiliary positioning tube and the inner tube, and a plurality of independent stamping openings are formed, so that the air bags can be inflated individually according to the size and position of the thrombus on the inner wall of the blood vessel. The microcatheter can be fixed, and the direction of the guide wire in the blood vessel can be adjusted by the inflation and expansion of the air bags at different positions, so that the guide wire can be precisely punctured from the different positions into the true lumen, and the expanded air bags can also provide support for the puncture of the guide wire.

[0004] When the above-mentioned method is used for intervention treatment, the blockage is gradually unblocked after being inserted, but this unblocking method can easily cause damage to the blood vessel wall, resulting in poor postoperative recovery effect and long recovery time. Utility model content

[0005] In view of the deficiencies of the prior art, the utility model provides a vascular intervention microcatheter, which solves the problem that the blockage is gradually unblocked after being inserted, but this unblocking method can easily cause damage to the blood vessel wall, resulting in poor postoperative recovery effect and long recovery time.

[0006] To achieve the above-mentioned purpose, the utility model realizes the following technical scheme: a vascular intervention microcatheter, comprising an outer catheter, characterized in that: the outer catheter is internally fixedly connected with a positioning tube, the positioning tube is fixedly connected with an inner catheter away from the outer catheter, one end of the outer catheter is fixedly connected with a limiting plate, the limiting plate is arranged outside the inner catheter, the limiting plate is fixedly connected with an expansion layer away from the outer catheter, the expansion layer is arranged outside the inner catheter, and the expansion layer is fixedly connected with a mesh sleeve outside.

[0007] Preferably, the positioning tube is internally provided with an air guide pipe, one end of the air guide pipe is arranged inside the inflation layer close to the position of the limiting plate.

[0008] Preferably, the limiting plate is symmetrically arranged in two groups, one group of the limiting plate is fixedly connected to the end of the inflation layer away from the outer layer catheter.

[0009] Preferably, the inner layer catheter is internally and slidably connected with a microcatheter body, the microcatheter body is provided with a scraping assembly away from the inner layer catheter.

[0010] Preferably, the scraping assembly comprises a limiting plate, the limiting plate is fixedly connected to the side of the microcatheter body away from the inner layer catheter, and the limiting plate is provided with an inflation ball away from the microcatheter body.

[0011] Preferably, the inflation ball is fixedly connected with a transmission pipe close to the limiting plate, the transmission pipe is fixedly connected to the side of the limiting plate away from the microcatheter body, the microcatheter body is communicated with the inflation ball through the transmission pipe, the inflation ball is externally fixedly connected with a spiral scraper, and the spiral scraper is circumferentially arranged outside the inflation ball in multiple groups.

[0012] The utility model provides a kind of vascular intervention microcatheter.Compared with prior art, it has the following beneficial effects:

[0013] 1, the vascular intervention microcatheter, the inner layer catheter and the inflation layer are separated by positioning tube, gas can be injected between the inflation layer and the inner layer catheter by air guide pipe at this time, the inflation layer will drive the mesh sleeve to expand at this time, so that the blood vessel inside the blockage can be preliminarily cleaned, the effect of cleaning the inner wall of blood vessel is realized, the problem of damage to the inner wall of blood vessel caused by the single-layer structure is solved, and the safety during use is improved.

[0014] 2, the vascular intervention microcatheter, the inflation ball is expanded by gas entering the inflation ball inside along the microcatheter body and the transmission pipe, so that the inflation ball is rotated by rotating the microcatheter body, and the limiting plate ensures the inflation direction of the inflation ball, so that the spiral scraper can be used to clean the blockage inside the blood vessel, the effect of cleaning the blockage is realized, the problem of poor cleaning effect of the blockage inside the blood vessel caused by the mesh sleeve is solved, and the safety during use is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is a three-dimensional sectional structure schematic diagram of the utility model;

[0017] Figure 3 It is a three-dimensional sectional structure schematic diagram of the utility model Figure 2The enlarged structure schematic view at middle A;

[0018] Figure 4 The utility model discloses Figure 2 The enlarged structure schematic view at middle B;

[0019] Figure 5 The utility model discloses Figure 2 The enlarged structure schematic view at middle C.

[0020] In the figure: 1, outer layer catheter, 2, limiting plate, 3, expansion layer, 4, inner layer catheter, 5, grid cover, 6, positioning tube, 7, gas guide pipe, 8, microcatheter main body, 9, positioning plate, 10, transmission pipe, 11, expansion ball, 12, spiral scraper. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a kind of vascular intervention microcatheter, including outer layer catheter 1, it is characterized in that: the positioning tube 6 is fixedly connected in the outer layer catheter 1, the inner layer catheter 4 is fixedly connected to the positioning tube 6 side away from outer layer catheter 1, the limiting plate 2 is fixedly connected to the outer layer catheter 1 one end, the limiting plate 2 is arranged in inner layer catheter 4 outside, the expansion layer 3 is fixedly connected to the limiting plate 2 one end away from outer layer catheter 1 of the limiting plate 2, the expansion layer 3 is arranged in inner layer catheter 4 outside, the grid cover 5 is fixedly connected to the expansion layer 3 outside, the gas guide pipe 7 is arranged in the positioning tube 6, and the gas guide pipe 7 one end is arranged in the expansion layer 3 inside close to the limiting plate 2 position.

[0023] When working, outer layer catheter 1 is inserted along blood vessel, when expansion layer 3 reaches the blockage position, gas is injected by folding gas guide pipe 7, positioning tube 6 guarantees that gas blown along gas guide pipe 7 does not deform, and gas enters between inner layer catheter 4 and expansion layer 3, can make expansion layer 3 expand, so that expansion layer 3 drives grid cover 5 to expand, so that the gap of grid cover 5 is attached with the blockage of blood vessel, and outer layer catheter 1 is rotated, so that expansion layer 3 and grid cover 5 are rotated, so that the blockage in the blood vessel is cleaned, the effect of cleaning the inner wall of blood vessel is realized, the problem that the inner wall of blood vessel is damaged by using single layer structure to gradually scrape is solved, and the safety during use is improved.

[0024] The limiting plate 2 has two groups of symmetrical arrangement, one group of the limiting plate 2 is fixedly connected to the expansion layer 3 away from the outer layer catheter 1, the inner layer catheter 4 is slidably connected with the microcatheter body 8, the microcatheter body 8 is provided with a scraping assembly away from the inner layer catheter 4, the scraping assembly comprises a positioning plate 9, the positioning plate 9 is fixedly connected to the microcatheter body 8 away from the inner layer catheter 4, and the positioning plate 9 is provided with an expansion ball 11 away from the microcatheter body 8.

[0025] In work, the microcatheter body 8 in the inner layer catheter 4 is telescopic, so that the microcatheter body 8 drives the positioning plate 9 and the expansion ball 11 to clean the blockage of the narrow blood vessel, and the cleaned blockage enters the inner layer catheter 4 for collection, realizing the effect of cleaning the blockage, solving the problem that the cleaning effect of the blockage in the blood vessel is poor by only using the mesh sleeve 5, and improving the safety during use.

[0026] The expansion ball 11 is fixedly connected with a transmission pipe 10 close to the positioning plate 9, the transmission pipe 10 is fixedly connected to the positioning plate 9 away from the microcatheter body 8, the microcatheter body 8 is connected with the transmission pipe 10 and the expansion ball 11, the expansion ball 11 is fixedly connected with a spiral scraper 12 outside, and the spiral scraper 12 has a plurality of groups of circumferential arrays outside the expansion ball 11.

[0027] In work, the microcatheter body 8 injects gas into the expansion ball 11 along the transmission pipe 10, so that the expansion ball 11 expands, and the spiral scraper 12 can rotate and scrape the blockage adhered to the inner wall of the blood vessel after the expansion ball 11 expands, at this time, the gas is released from the expansion ball 11, so that the blockage collected by the spiral scraper 12 is collected in the inner layer catheter 4, so as to be cleaned.

[0028] When working or using, the outer layer catheter 1 is inserted along the blood vessel, when the inflation layer 3 reaches the blockage position, the gas injection pipe 7 injects gas, the positioning pipe 6 ensures that the gas blown along the gas injection pipe 7 is not deformed, and the gas enters between the inner layer catheter 4 and the inflation layer 3, which makes the inflation layer 3 inflate, so that the inflation layer 3 drives the mesh sleeve 5 to inflate, so that the gap of the mesh sleeve 5 is in contact with the blockage of the blood vessel, and the outer layer catheter 1 is rotated to rotate the inflation layer 3 and the mesh sleeve 5, thereby cleaning the blockage inside the blood vessel, achieving the effect of cleaning the inner wall of the blood vessel, solving the problem of damage to the inner wall of the blood vessel caused by gradually scraping with a single layer structure in the prior art, improving the safety during use, and the microcatheter main body 8 in the inner layer catheter 4 is telescopic, so that the microcatheter main body 8 drives the positioning plate 9 and the inflation ball 11 to clean the blockage of the blood vessel at the narrow part, and the cleaned blockage is collected in the inner layer catheter 4, achieving the effect of cleaning the blockage, solving the problem that the cleaning effect of the blockage inside the blood vessel is poor when only the mesh sleeve 5 is used, and improving the safety during use, and the microcatheter main body 8 injects gas into the inflation ball 11 along the transmission pipe 10, so that the inflation ball 11 inflates, and the spiral scraper 12 can rotate and scrape the blockage on the inner wall of the blood vessel after the inflation ball 11 inflates, at this time, the gas is released from the inflation ball 11, so that the blockage collected by the spiral scraper 12 is collected in the inner layer catheter 4, thereby being cleaned.

[0029] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article, or apparatus. Without more limitations, the statement "comprises a limited element" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vascular intervention microcatheter comprising an outer catheter (1), characterized in that: The outer layer conduit (1) is internally fixedly connected with a positioning pipe (6), the positioning pipe (6) is fixedly connected with an inner layer conduit (4) away from the outer layer conduit (1), one end of the outer layer conduit (1) is fixedly connected with a limiting plate (2), the limiting plate (2) is arranged outside the inner layer conduit (4), one end of the limiting plate (2) away from the outer layer conduit (1) is fixedly connected with an expansion layer (3), the expansion layer (3) is arranged outside the inner layer conduit (4), and the expansion layer (3) is fixedly connected with a mesh sleeve (5) outside.

2. The microcatheter for vascular intervention according to claim 1, wherein: The positioning pipe (6) is internally provided with a gas guide pipe (7), one end of the gas guide pipe (7) is arranged inside the expansion layer (3) close to the limiting plate (2).

3. The microcatheter for vascular intervention according to claim 2, wherein: The limiting plate (2) has two groups arranged in a symmetrical manner, one group of the limiting plate (2) is fixedly connected to one end of the expansion layer (3) away from the outer layer conduit (1).

4. The microcatheter for vascular intervention according to claim 3, wherein: The inner layer conduit (4) is internally and slidably connected with a micro conduit body (8), and the micro conduit body (8) is provided with a scraping assembly away from the inner layer conduit (4).

5. The microcatheter for vascular intervention according to claim 4, wherein: The scraping assembly comprises a limiting plate (9), the limiting plate (9) is fixedly connected to one side of the micro conduit body (8) away from the inner layer conduit (4), and the limiting plate (9) is provided with an expansion ball (11) away from the micro conduit body (8).

6. The microcatheter for vascular intervention according to claim 5, wherein: The expansion ball (11) is fixedly connected with a transmission pipe (10) close to the limiting plate (9), the transmission pipe (10) is fixedly connected to one side of the limiting plate (9) away from the micro conduit body (8), the micro conduit body (8) is in communication with the expansion ball (11) through the transmission pipe (10), the expansion ball (11) is fixedly connected with a spiral scraper (12) outside, and the spiral scraper (12) has a plurality of groups arranged in a circumferential array outside the expansion ball (11).

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