CN111588441A - Three-dimensional bolt support of getting - Google Patents
Three-dimensional bolt support of getting Download PDFInfo
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- CN111588441A CN111588441A CN202010495608.1A CN202010495608A CN111588441A CN 111588441 A CN111588441 A CN 111588441A CN 202010495608 A CN202010495608 A CN 202010495608A CN 111588441 A CN111588441 A CN 111588441A
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- thrombus
- embolectomy
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- stent
- spiral ring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
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Abstract
The invention discloses a three-dimensional embolectomy support, and belongs to the field of medical instruments. The thrombus extraction stent comprises a mesh section and a spiral ring; n grid sections are arranged, N-1 spiral rings are arranged, and the grid sections and the spiral rings are connected into a thrombus extraction support at intervals; the spiral ring has a rotation angle, the grid section is a C-shaped hollow grid section, openings are formed in different directions according to needs, and thrombus can be caught from different angles; the spiral ring fixes the thrombus annularly. The thrombus capture stent is applied to thrombus capture, due to the sectional design and the multi-side opening, thrombus can be captured from different angles, the thrombus at the bent part of a blood vessel can be captured, and the clinical risks of blood vessel wall injury and the like are reduced.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a three-dimensional thrombus removal support.
Background
The atherosclerotic plaque is broken, so that blood flow forms thrombus on the inner surface of blood vessels of a cardiovascular and cerebrovascular system, the thrombus falls off to block the cardiovascular and cerebrovascular system, diseases such as myocardial infarction and cerebral apoplexy are caused, myocardial ischemia necrosis and cerebral anoxia are caused, and the life health of human beings is greatly threatened. Aiming at cardiovascular and cerebrovascular thrombosis, the current main treatment methods comprise drug thrombolysis, mechanical thrombus extraction, thrombus suction and the like. Mechanical thrombus removal and thrombus suction are realized by taking out thrombus from a human blood vessel through a physical method, so that the blood vessel is communicated again, and the normal flow of blood is recovered, thereby achieving the purpose of treatment. The main principle of mechanical thrombus removal is that a thrombus removal bracket made of memory alloy material is sent to a target position with the assistance of a guide wire and a catheter, and the thrombus is captured and pulled into the catheter and then taken out of the body after the thrombus removal bracket is released.
The existing embolectomy stent is generally formed by laser cutting or weaving of nickel-titanium alloy, stainless steel or other materials, has a hollowed-out grid structure on the surface, and is shaped by heat treatment or other modes. One end of the thrombus taking support is usually connected with a pushing rod, and the thrombus taking support is pressed and held before being conveyed to form a cylinder shape so as to be conveyed to a target blood vessel through a thin catheter. After the thrombus taking support is released, due to the shape memory effect of the material, the section is in a C-shaped cylinder shape with a single-side opening, so that the thrombus can be caught.
The conventional cylindrical thrombus taking support with the C-shaped single-side opening has the structural characteristics that thrombus can be captured from one side only after the cylindrical thrombus taking support is released, the clamping force of the thrombus taking support on the thrombus is limited, the thrombus can fall off in the process of being pulled into a catheter and escapes to the deep part of the blood vessel or other blood vessels along with blood flow, so that the thrombus taking operation fails, and unpredictable clinical risks are brought to a patient.
The conventional cylindrical embolectomy support is generally of a hollow latticed integral structure, the radial structure stress is large, the pressing and holding difficulty is high, the reduction range of the diameter after rolling is limited, the applicable catheter specification is small, the conveying performance is reduced, embolectomy cannot be carried out on smaller blood vessels, and the application range is small.
The tradition tube-shape embolectomy support, the latticed overall structure that is the fretwork generally, its axial structure stress is great, and the ability of taking place the bending along the axial is relatively poor, is difficult to get into and through crooked blood vessel, also is difficult to arrest the thrombus that is located the crooked department of blood vessel, and probably in embolectomy operation process, causes comparatively serious damage to the vascular wall, brings unpredictable clinical risk for the patient.
Accordingly, those skilled in the art have endeavored to develop a three-dimensional embolectomy support that overcomes the above problems.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is the problem of not being able to catch thrombi from different angles.
In order to achieve the aim, the invention provides a three-dimensional embolectomy stent, which comprises a grid section and a spiral ring; n grid sections are arranged, N-1 spiral rings are arranged, and the grid sections and the spiral rings are connected into a thrombus removal support at intervals; the spiral ring has a rotation angle, the grid section is a C-shaped hollow grid section, openings are formed in different directions according to needs, and thrombus can be caught from different angles; the spiral ring fixes the thrombus annularly.
Further, the mesh section is in the shape of a roll.
Further, development points may be provided on the mesh segments.
Further, a developing point may be provided on the spiral ring.
Further, the diameter and axial length of the mesh segment are determined according to the size of the blood vessel and the position of the thrombus.
Further, the diameter and axial length of the helical ring are determined according to the matching requirements of the mesh segments.
Further, the helical ring may be axially stretchable.
Further, the rotation angle of the spiral ring determines the opening direction of the mesh segment.
Furthermore, the outer end grid section of the embolectomy support is connected with a pushing rod, and the pushing rod is made of metal or high polymer materials.
Furthermore, the mesh section and the spiral ring are formed by a nickel-titanium alloy tube with shape memory characteristics through laser cutting and heat treatment shaping, or are formed by nickel-titanium alloy wires through weaving, welding and heat treatment shaping.
The invention has the technical effects that:
1. the thrombus taking bracket is designed in a sectional mode, and thrombus can be caught from different angles due to multi-side openings; simultaneously, the spiral ring can carry out the hoop to the thrombus and fix to can realize catching and fixing the three-dimensional of thrombus, improve the clamping-force of getting the thrombus support to the thrombus, effectively prevent the emergence that the thrombus drops.
2. After the spiral ring axial tension, radial deformability is stronger, and the sectional type design is compared in the latticed overall structure of fretwork of conventional embolus taking support, has reduced the radial structure stress of embolus taking support, and embolus taking support is whole to be changed into to press and hold into less diameter to can carry tiny blood vessel through the pipe that the internal diameter is littleer, transport performance will be showing and is promoted.
3. The spiral ring and the spaced sectional type design of the hollow grid of drum form, axial structure stress reduces by a wide margin, and thrombectomy support axial compliance promotes, can adapt to the blood vessel of different forms, and the transportability obtains further reinforcing, also can implement to the thrombus that is located vascular bending department simultaneously and arrest, and has reduced the probability that clinical risks such as vascular wall damage take place.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a three-dimensional schematic view of a embolectomy stent according to a preferred embodiment of the present invention;
FIG. 2 is a schematic front view of a three-dimensional embolectomy holder, according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view of a preferred embodiment of a radial expansion of a three-dimensional thrombectomy stent of the present invention;
FIG. 4 is a radially expanded view of an embolectomy stent according to another preferred embodiment of the invention.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1, a three-dimensional embolectomy stent comprises N mesh sections 1 and N-1 spiral rings 2; the grid section 1 and the spiral ring 2 are connected into a thrombus taking support at intervals; the spiral ring 2 has a rotation angle, the grid section 1 is a C-shaped hollow grid section, and openings are formed in different directions according to needs, so that thrombus can be caught from different angles; the spiral ring 2 fixes the thrombus annularly. The grid section 1 is in a reel shape, and developing points can be arranged on the grid section 1 and the spiral ring 2; the diameter and axial length of the mesh section 1 are determined according to the size of the blood vessel and the position of the thrombus; the diameter and axial length of the helical ring 2 are determined according to the fitting requirements of the mesh segment 1. The helical ring 2 is axially stretchable, and the rotation angle of the helical ring 2 determines the opening direction of the mesh segment 1. The outer end grid section 1 of the embolectomy support is connected with a pushing rod, and the pushing rod is made of metal or high polymer materials. The thrombus taking support is formed by a nickel-titanium alloy tube with shape memory characteristics through laser cutting and heat treatment shaping, or formed by nickel-titanium alloy wires through weaving, welding and heat treatment shaping, or formed by processing stainless steel or other medical materials. The thrombus removal support can be additionally provided with developing points at specific positions of the spiral ring and the grid section so as to improve the developing performance of the thrombus removal support; in addition, one end of the embolectomy support can be connected with a pushing rod made of metal or high polymer materials so as to be matched with the guide pipe to be conveyed to a target site.
Example one
Referring to fig. 1, 2 and 3, in a three-dimensional embolectomy stent according to a preferred embodiment of the present invention, there are three mesh segments 1, namely, a first mesh segment 11, a second mesh segment 12 and a third mesh segment 13, and two spiral rings 2, namely, a first spiral ring 21 and a second spiral ring 22.
The first grid section 11, the second grid section 12 and the third grid section 13 are all in a drum-shaped hollow structure; the grid area, the diameter and the length along the axial direction of the grid section can be changed according to actual needs, and are not limited to the pattern in the figure.
The first spiral ring 21 is connected with the first grid section 11 and the second grid section 12, the rotation angle of the first spiral ring 21 is 540 degrees, the included angle between the opening directions of the first grid section 11 and the second grid section 12 is 180 degrees, and the first grid section 11 and the second grid section 12 are opened towards different sides; the second spiral ring 22 connects the second mesh segment 12 and the third mesh segment 13, and the rotation angle of the second spiral ring 22 is 540 °, so that the included angle between the opening directions of the second mesh segment 12 and the third mesh segment 13 is 180 °, and the second mesh segment 12 and the third mesh segment 13 are open to different sides.
The rotation angle of the spiral ring 2 can be changed according to actual needs, and if the rotation angle of the spiral ring is (360n + x) °, where n is a natural number and x is a real number, the included angle between the opening directions of two adjacent mesh segments 1 connected by the spiral ring 2 is x °. The different spiral rings 2 may have the same or different rotation angles. In addition, the screw pitch of the spiral ring 2 can be uniform or variable, and can be specifically changed according to actual needs; the diameter of the spiral ring 2 may be uniform or may vary, and may be changed according to the diameter of two adjacent mesh segments and the actual requirement.
The length of the embolectomy stent, the number of the mesh sections and the number of the spiral rings can be changed according to actual needs, and the embolectomy stent is not limited to the pattern in the drawing.
Example two
As shown in FIG. 4, in the embolectomy stent of another preferred embodiment of the present invention, there are four mesh segments 1, namely, a first mesh segment 11, a second mesh segment 12, a third mesh segment 13 and a fourth mesh segment 14, and three helical rings 2, namely, a first helical ring 21, a second helical ring 22 and a third helical ring 23. The diameters of different grid sections 1 are the same or different, and the mesh-type blood vessel can adapt to blood vessels with different diameters at the far end and the near end; the rotation angles of the spiral rings 2 are different, and the opening directions of the grid sections 1 are different; the diameter of the spiral ring 2 is changed, so that transition between grid sections 1 with different diameters can be realized; the larger the pitch of the spiral ring 2 is, the more easily the embolectomy stent is axially bent.
In practice, other modifications may be made as required and are not limited to that shown in FIG. 4.
The thrombus taking support is composed of a spiral ring 2 with different rotation angles and mesh sections 1 with different mesh areas, diameters and axial lengths, the thrombus can be caught from different angles after the mesh sections 1 are released, and meanwhile the spiral ring 2 fixes the thrombus in the annular direction, so that the three-dimensional catching and fixing of the thrombus can be realized, the clamping force of the thrombus taking support can be effectively improved, and the thrombus is prevented from falling off.
The invention adopts a sectional design, the C-shaped drum-shaped hollow grids are connected through the spiral ring 2, and the thrombus taking support is provided with openings at multiple sides in a sectional manner, so that thrombus can be caught from different angles; therefore, the thrombus can be captured and fixed in a three-dimensional manner, and the clamping force of the thrombus taking support on the thrombus is improved. After 2 axial extensions of spiral ring, radial deformability is stronger, and the sectional type design is compared in the latticed overall structure of fretwork of conventional embolectomy support, has reduced the radial structure stress of embolectomy support to can carry tiny blood vessel through the pipe that the internal diameter is littleer, transport performance will be showing and is promoted. The invention has small axial structural stress and improved axial flexibility, can adapt to blood vessels with different forms, further enhances the conveying performance, simultaneously can capture thrombus at the bending part of the blood vessel, and reduces the probability of clinical risks such as blood vessel wall injury and the like.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A three-dimensional embolectomy bracket is characterized by comprising a grid section and a spiral ring; n grid sections are arranged, N-1 spiral rings are arranged, and the grid sections and the spiral rings are connected into a thrombus extraction support at intervals; the spiral ring has a rotation angle, the grid section is a C-shaped hollow grid section, openings are formed in different directions according to needs, and thrombus can be caught from different angles; the spiral ring fixes the thrombus annularly.
2. A volumetric thrombectomy stent according to claim 1, wherein the mesh segment is in the shape of a roll.
3. A stereoscopic embolectomy stent as recited in claim 1, wherein visualization points are disposed on the mesh section.
4. The stereoscopic embolectomy stent of claim 1 wherein the spiral ring is configured to have visualization points.
5. The stereoscopic embolectomy stent of claim 1, wherein the diameter and axial length of the mesh section are determined according to the size of the blood vessel and the position of the thrombus.
6. The stereoscopic embolectomy stent of claim 1 wherein the diameter and axial length of the helical loop are determined by the fit requirements of the mesh segment.
7. The spatial embolectomy stent of claim 1, wherein the helical loop is axially stretchable.
8. The spatial embolectomy stent of claim 1, wherein the angle of rotation of the helical loop determines the direction of opening of the mesh segment.
9. The stereoscopic embolectomy support of claim 1, wherein the outer end mesh section of the embolectomy support is connected with a push rod, and the push rod is made of metal or high polymer material.
10. The stereoscopic embolectomy stent of claim 1, wherein the mesh segments and the helical rings are formed by laser cutting and heat setting of a nitinol tube with shape memory characteristics, or by weaving, welding and heat setting of nitinol wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010495608.1A CN111588441A (en) | 2020-06-03 | 2020-06-03 | Three-dimensional bolt support of getting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010495608.1A CN111588441A (en) | 2020-06-03 | 2020-06-03 | Three-dimensional bolt support of getting |
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| Publication Number | Publication Date |
|---|---|
| CN111588441A true CN111588441A (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010495608.1A Pending CN111588441A (en) | 2020-06-03 | 2020-06-03 | Three-dimensional bolt support of getting |
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| CN (1) | CN111588441A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112568964A (en) * | 2020-11-30 | 2021-03-30 | 赛诺神畅医疗科技有限公司 | Thrombus taking support and thrombus taking device |
| CN115153994A (en) * | 2022-07-06 | 2022-10-11 | 深圳市金瑞凯利生物科技有限公司 | Can post expand vascular support and system |
| CN115281905A (en) * | 2022-08-30 | 2022-11-04 | 苏州中天医疗器械科技有限公司 | Thrombectomy support, thrombectomy device and thrombectomy system |
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| CN105662534A (en) * | 2016-01-06 | 2016-06-15 | 赵烜 | Blood vessel thrombus-taking device with spine-shaped structures and thrombus therapeutic instrument thereof |
| CN205339057U (en) * | 2016-01-06 | 2016-06-29 | 赵烜 | Blood vessel thrombectomy device and thrombus therapeutic instrument with thorn column structure |
| CN106580397A (en) * | 2016-12-20 | 2017-04-26 | 北京久事神康医疗科技有限公司 | Sectional thrombus extraction device and thrombus extraction method making use of thrombus extraction device |
| CN206333945U (en) * | 2016-08-04 | 2017-07-18 | 上海形状记忆合金材料有限公司 | A kind of bidirectional protective takes bolt device |
| CN107049420A (en) * | 2017-05-09 | 2017-08-18 | 心凯诺医疗科技(上海)有限公司 | One kind takes bolt support and thrombus withdrawing device |
| CN206576918U (en) * | 2016-12-20 | 2017-10-24 | 北京久事神康医疗科技有限公司 | A kind of segmented takes pin device |
| CN109965941A (en) * | 2017-12-28 | 2019-07-05 | 先健科技(深圳)有限公司 | One kind taking bolt device |
| US20190365397A1 (en) * | 2017-01-23 | 2019-12-05 | Inretio Ltd. | An apparatus and a method for clot and plaque retracting |
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2020
- 2020-06-03 CN CN202010495608.1A patent/CN111588441A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105662534A (en) * | 2016-01-06 | 2016-06-15 | 赵烜 | Blood vessel thrombus-taking device with spine-shaped structures and thrombus therapeutic instrument thereof |
| CN205339057U (en) * | 2016-01-06 | 2016-06-29 | 赵烜 | Blood vessel thrombectomy device and thrombus therapeutic instrument with thorn column structure |
| CN206333945U (en) * | 2016-08-04 | 2017-07-18 | 上海形状记忆合金材料有限公司 | A kind of bidirectional protective takes bolt device |
| CN106580397A (en) * | 2016-12-20 | 2017-04-26 | 北京久事神康医疗科技有限公司 | Sectional thrombus extraction device and thrombus extraction method making use of thrombus extraction device |
| CN206576918U (en) * | 2016-12-20 | 2017-10-24 | 北京久事神康医疗科技有限公司 | A kind of segmented takes pin device |
| US20190365397A1 (en) * | 2017-01-23 | 2019-12-05 | Inretio Ltd. | An apparatus and a method for clot and plaque retracting |
| CN107049420A (en) * | 2017-05-09 | 2017-08-18 | 心凯诺医疗科技(上海)有限公司 | One kind takes bolt support and thrombus withdrawing device |
| CN109965941A (en) * | 2017-12-28 | 2019-07-05 | 先健科技(深圳)有限公司 | One kind taking bolt device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112568964A (en) * | 2020-11-30 | 2021-03-30 | 赛诺神畅医疗科技有限公司 | Thrombus taking support and thrombus taking device |
| CN115153994A (en) * | 2022-07-06 | 2022-10-11 | 深圳市金瑞凯利生物科技有限公司 | Can post expand vascular support and system |
| CN115281905A (en) * | 2022-08-30 | 2022-11-04 | 苏州中天医疗器械科技有限公司 | Thrombectomy support, thrombectomy device and thrombectomy system |
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Address after: 201201 Room 201, building 4, No. 590, Ruiqing Road, Zhangjiang High Tech Industry East District, Pudong New Area, Shanghai Applicant after: Shanghai Xinwei Medical Technology Co.,Ltd. Address before: 201201 Room 201, building 4, No. 590, Ruiqing Road, Zhangjiang High Tech Industry East District, Pudong New Area, Shanghai Applicant before: SHANGHAI HEARTCARE MEDICAL TECHNOLOGY Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20200828 |