CN111820990B - Three-dimensional spiral intracranial thrombus removal support - Google Patents
Three-dimensional spiral intracranial thrombus removal support Download PDFInfo
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- CN111820990B CN111820990B CN202010716545.8A CN202010716545A CN111820990B CN 111820990 B CN111820990 B CN 111820990B CN 202010716545 A CN202010716545 A CN 202010716545A CN 111820990 B CN111820990 B CN 111820990B
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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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- 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
- A61B2017/22038—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 with a guide wire
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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
- A61B2017/22094—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 for crossing total occlusions, i.e. piercing
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Abstract
The invention relates to a three-dimensional spiral intracranial thrombus removal support, and belongs to the technical field of medical instruments. Comprises a spiral body, a conveying guide wire, a developing ring, a first central point and a second central point; the thrombus taking support is provided with filamentous spirochetes with different diameters which are sequentially sleeved according to the diameters, and the central axes of the spirochetes are overlapped; one end of the filamentous spiral body is connected with a first central point arranged on the central axis of the spiral body and is connected with the conveying guide wire through the first central point, and the other end of the filamentous spiral body is connected with a second central point arranged on the central axis of the spiral body; the central point is provided with a developing ring. The invention provides the three-dimensional spiral support with high thrombus extraction success rate, strong thrombus grabbing capacity, easy release, easy recovery and high safety by changing the space structure and the support form of the support.
Description
Technical Field
The invention relates to a three-dimensional spiral intracranial thrombus removal support, and belongs to the technical field of medical instruments.
Background
Current treatment methods for thrombus in stroke include drug thrombolysis and surgical embolectomy; wherein the effective window period of the drug thrombolysis is short, and the complications are more after recovery; the surgical mechanical embolectomy device makes it possible to achieve rapid and complete revascularization. But also has some problems, such as poor thrombus removal capability and long thrombus removal time; the rate of embolus escaping machine is high, and the embolus is difficult to take; the developing points are few, and the bracket is not easy to release and observe; the support force of the bracket is insufficient, and the large bolt is hard to embed; the bracket has poor catching capacity on small bolts and small hardness bolts; poor release recovery performance and difficult operation; poor bending property of the bracket and the like. Therefore, there is a need in the art for an embolectomy stent which is easy to release and recover, has a high embolectomy success rate, and causes little damage to blood vessels.
Disclosure of Invention
The invention aims to solve the technical problem that an embolectomy stent which is easy to release and recover, high in embolectomy success rate and less in vascular damage is urgently needed in the existing surgical embolectomy treatment. The required thrombus taking bracket needs to meet the requirement of strong catching capacity on hard thrombus; the escape probability of the rare thrombus and the broken thrombus is reduced; the bending performance of the stent is improved so as to adapt to different blood vessels; the embolectomy support is provided with a plurality of developing points, so that the development observation is easy; the developing ring is arranged in the stent, so that the technical requirement on the injury of the blood vessel wall is reduced.
In order to solve the problem, the invention adopts the technical scheme that a three-dimensional spiral intracranial thrombus extraction support is provided, which comprises a spiral body, a conveying guide wire, a developing ring, a first central point and a second central point; the thrombus taking support is provided with filamentous spirochetes with different diameters which are sequentially sleeved according to the diameters, and the central axes of the spirochetes are overlapped; one end of the filamentous spiral body is connected with a first central point arranged on the central axis of the spiral body and is connected with the conveying guide wire through the first central point, and the other end of the filamentous spiral body is connected with a second central point arranged on the central axis of the spiral body; and the central point is provided with a developing ring.
Preferably, the thread pitch of the filamentous spiral body close to the second central point is smaller than the thread pitch of the filamentous spiral body in the middle of the thrombus taking support.
Preferably, the thread spirals with different diameters are arranged between the first central point and the second central point, and the maximum stretching length of the spiral thread is the same or different.
Preferably, the different diameters of the filamentous spiral bodies are arranged between the first central point and the second central point, and the rotating directions of spiral body wires are the same or different.
Preferably, a developing ring or a developing wire is arranged on each of the first central point and the second central point.
Preferably, the number of the filamentous spirochetes arranged on the thrombus removal support is more than or equal to 2.
Preferably, the spiral wire is made of nickel titanium wire or stainless steel wire.
Preferably, the maximum diameter of the filamentous spirochetes of different diameters sequentially sleeved according to the diameter is set to be 2-7mm, and the minimum diameter of the filamentous spirochetes is set to be 0.2-6 mm.
Preferably, the diameter of the spiral body wire is set to be 0.01-0.2 mm.
Preferably, the length of the spiral body between the first central point and the second central point is set to be 20-60 mm.
Compared with the prior art, the invention has the following beneficial effects:
the thrombus extraction support provided by the invention has the advantages that by changing the space structure and the support form of the support, the three-dimensional spiral support which is high in thrombus extraction success rate, strong in thrombus grabbing capacity, easy to release and recover and high in safety is provided, the thrombus extraction support is easy to operate and use, and the success probability of mechanical thrombus extraction is improved.
1. The thrombus taking support has good release and recovery performance, and the design of the spiral combined structure ensures that the thrombus taking support is a plurality of parallel straight lines in a completely stretched state;
2. the thrombus embedding ability of the thrombus taking bracket is good, the catching ability is strong, and spiral bodies with different densities, different diameters and different wire diameters enable the embedding ability of hard thrombus, thin thrombus, big thrombus and small thrombus to be stronger;
3. the thrombus is not easy to escape due to the thrombus taking support, and due to the structure of the conical body, the spiral support can keep a certain umbrella-shaped structure in stretching, so that the thrombus is not easy to escape;
4. the thrombus taking support has small damage to the vessel wall, and the spiral body structure and the two ends of the developing ring are arranged, so that the damage to the vessel wall by the spiral body is reduced to the minimum in the moving process;
5. the thrombus taking support has good adaptability to bent blood vessels, and the spiral body structure ensures that the spiral support has good adaptability to blood vessels with different bends, so that thrombus can be taken out easily in the blood vessels with larger bends.
Drawings
FIG. 1 is a schematic structural view of a three-dimensional spiral intracranial thrombectomy support of the present invention;
reference numerals: 1. delivering a guide wire; 2. a first developing ring; 3. a second developing ring; 4. a helical body; 5. a combined conical spiral body; 6. the total length of the spiral body; 7. a proximal end; 8. a distal end; 9. a central point I; 10. and a second central point.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:
as shown in fig. 1, the invention provides a three-dimensional spiral intracranial thrombus extraction support, which comprises a spiral body 4, a delivery guide wire 1, a developing ring 2, a first central point 9 and a second central point 10; the thrombus taking support is provided with filamentous spiral bodies 4 with different diameters which are sleeved in sequence according to the diameters, and the central axes of the spiral bodies 4 are overlapped; one end of the filamentous spiral body 4 is connected with a first central point 9 arranged on the central axis of the spiral body and is connected with the conveying guide wire 1 through the first central point 9, and the other end of the filamentous spiral body 4 is connected with a second central point 10 arranged on the central axis of the spiral body; the central point is provided with a display ring 2. The thread pitch of the filiform spiral body 4 close to the central point II 10 is smaller than the thread pitch of the filiform spiral body 4 arranged in the middle of the thrombus taking support. The maximum stretching length of the spiral threads of the filamentous spiral bodies 4 with different diameters is the same or different between the first central point 9 and the second central point 10. The rotating directions of the spiral threads of the filamentous spiral bodies 4 with different diameters are the same or different between the first central point 9 and the second central point 10. And the first central point 9 and the second central point 10 are respectively provided with a developing ring or a developing wire. The number of the filamentous spirochetes 4 arranged on the thrombus taking support is more than or equal to 2. The spiral body wire is made of nickel-titanium wire or stainless steel wire. The maximum diameter of the filamentous spirochetes 4 with different diameters sequentially sleeved according to the diameter is set to be 2-7mm, and the minimum diameter of the filamentous spirochetes 4 is set to be 0.2-6 mm. The diameter of the spiral body is set to be 0.01-0.2 mm. The length 6 of the spiral body between the first central point and the second central point is set to be 20-60 mm.
As shown in figure 1, the three-dimensional spiral intracranial thrombus removal support mainly comprises four parts:
1. and (3) spiral body 4: the spiral support is composed of three spiral structures with different diameters, is made of nickel-titanium materials, has the same length in a release state and the same length in an ultimate stretching state, and has different diameters of spiral wires so that the elastic coefficients are different respectively. The three spiral structures are divided into an inner layer, a middle layer and an outer layer.
2. Combined type conical spiral body 5: the combined conical spiral body 5 is naturally extended from the three spiral bodies 4, the structure of the combined conical spiral body is a scattered structure, the density is larger than that of the spiral bodies 4, and the elastic coefficient is also large;
3. first developing ring 2 and second developing ring 3: the developing rings are respectively arranged at the two extreme ends of the spiral body, the near end 7 and the far end 8;
4. the conveying guide wire 1: the delivery guide wire 1 is connected with one end of three spiral bodies 4 at one point and is made of nickel-titanium material.
The three spiral bodies of the three-dimensional spiral intracranial thrombus taking bracket are coaxial, the density and the wire diameter of the spiral body at the outermost layer are relatively small, the density and the wire diameter of the spiral bodies at the middle layer and the inner layer are relatively large, different thrombi are more easily embedded into the spiral body at the outer layer due to the spiral body structure, and the elastic coefficients of the middle layer and the inner layer are large, so that the shape of the bracket is kept in a stretching state; meanwhile, the three spirochetes with different elastic coefficients move relatively in the stretching process, so that the thrombus-grasping fastness of the spirochetes is stronger. The design of the combined conical spiral body 5 makes thrombus more difficult to escape in the stretching process; multi-point visualization makes it easier to view stent position during stretching.
Example one
1.3 spiral bodies adopt nickel-titanium wires, and the maximum stretching lengths of the spiral bodies are the same;
2. the number of the spiral body structures is 3, the outer diameters of all the spiral bodies are different, the diameter of the spiral body at the outermost layer is 7mm, and the diameter of the spiral body at the innermost layer is 3 mm;
3. the rotating directions of the spiral bodies are the same;
4. the diameter of the spiral body is 0.1mm, and the diameter of each spiral body can be the same;
5. two ends of each spiral body are welded on a coaxial central point;
6. the length of the entire helix L50 mm;
7. the most far end 8 of the whole spiral body has a conical structure, and the thread pitch is smaller and the density is higher;
8. the two ends of the whole spiral body are respectively provided with a developing ring or a developing wire;
9. the near end 7 of the spiral body is connected with a delivery guide wire;
example two
1.4 spiral bodies adopt nickel-titanium wires, and the maximum stretching lengths of the spiral bodies are the same;
2. the number of the spiral body structures is 4, the outer diameters of all the spiral bodies are different, the diameter of the spiral body at the outermost layer is 6mm, and the diameter of the spiral body at the innermost layer is 2 mm;
3. the rotation direction of the spiral body at the innermost layer is opposite to that of other spiral bodies;
4. the diameter of the spiral body is 0.05mm, and the diameter of each spiral body is the same;
5. two ends of each spiral body are welded on a coaxial central point;
6. the length of the entire helix L40 mm;
7. the most far end 8 of the whole spiral body has a conical structure, and the thread pitch is smaller and the density is higher;
8. the two ends of the whole spiral body are respectively provided with a developing ring or a developing wire;
9. the proximal end 7 of the spiral body is connected with a delivery guide wire.
EXAMPLE III
1.3 spiral bodies adopt nickel-titanium wires;
2. the number of the spiral body structures is 3, the outer diameters of all the spiral bodies are different, the diameter of the spiral body at the outermost layer is 5mm, and the diameter of the spiral body at the innermost layer is 0.5 mm;
3. the rotating directions of the spiral bodies are the same;
4. the maximum stretching length of the spiral body at the innermost layer is longer than that of other spiral bodies;
4. the diameter of the spiral body is 0.01mm, and the diameter of each spiral body is the same;
5. two ends of each spiral body are welded on a coaxial central point;
6. the length of the entire helix L60 mm;
7. the most far end 8 of the whole spiral body has a conical structure, and the thread pitch is smaller and the density is higher;
8. the two ends of the whole spiral body are respectively provided with a developing ring or a developing wire;
9. the proximal end 7 of the spiral body is connected with a delivery guide wire.
Example four
1.3 spiral bodies adopt nickel-titanium wires, and the maximum stretching lengths of the spiral bodies are the same;
2. the number of the spiral body structures is 3, the outer diameters of all the spiral bodies are different, the diameter of the spiral body at the outermost layer is 5mm, and the diameter of the spiral body at the innermost layer is 3 mm;
3. the rotation direction of the spiral body at the innermost layer is the same as that of other spiral bodies;
4. the diameter of the spiral body at the outermost layer is 0.02mm, and the diameter of the spiral body at the innermost layer is 0.1 mm;
5. two ends of each spiral body are welded on a coaxial central point;
6. the length of the entire helix L40 mm;
7. the most far end 8 of the whole spiral body has a conical structure, and the thread pitch is smaller and the density is higher;
8. the two ends of the whole spiral body are respectively provided with a developing ring or a developing wire;
9. the proximal end 7 of the spiral body is connected with a delivery guide wire.
EXAMPLE five
1.3 spiral bodies, wherein 2 spiral bodies adopt nickel-titanium wires, 1 spiral body adopts stainless steel wires, and the maximum stretching length of each spiral body is the same;
2. the number of the spiral body structures is 3, the outer diameters of all the spiral bodies are different, the diameter of the spiral body at the outermost layer is 5mm, and the diameter of the spiral body at the innermost layer is 3 mm;
3. the rotation direction of the spiral body at the innermost layer is the same as that of other spiral bodies;
4. the diameter of the spiral body at the outermost layer is 0.2mm, and the diameter of the spiral body at the innermost layer is 0.02 mm;
5. two ends of each spiral body are welded on a coaxial central point;
7. the length of the entire helix L60 mm;
8. the most far end 8 of the whole spiral body has a conical structure, and the thread pitch is smaller and the density is higher;
9. the two ends of the whole spiral body are respectively provided with a developing ring or a developing wire;
10. the proximal end 7 of the spiral body is connected with a delivery guide wire.
The invention provides a three-dimensional spiral intracranial thrombus removal support, which comprises the following specific technical parameter lists:
while the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to those of the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which can be made by utilizing the technical content disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (9)
1. A three-dimensional spiral intracranial thrombus extraction support is characterized in that: comprises a spiral body, a conveying guide wire, a developing ring, a first central point and a second central point; the thrombus taking support is provided with filamentous spiral bodies with different diameters, which are sequentially sleeved according to the diameters, the number of the filamentous spiral bodies arranged on the thrombus taking support is set to be more than 2, and the central axes of the spiral bodies are overlapped; one end of the filamentous spiral body is connected with a first central point arranged on the central axis of the spiral body and is connected with the conveying guide wire through the first central point, and the other end of the filamentous spiral body is connected with a second central point arranged on the central axis of the spiral body; and the central point I and/or the central point II are/is provided with a developing ring.
2. A three-dimensional helical intracranial thrombectomy stent as defined in claim 1, wherein: the thread pitch of the filamentous spiral body close to the central point II is smaller than the thread pitch of the filamentous spiral body arranged in the middle of the thrombus taking support.
3. A three-dimensional helical intracranial thrombectomy stent as defined in claim 1, wherein: the maximum stretching lengths of the spiral threads of the filamentous spiral bodies with different diameters are the same or different, and the maximum stretching lengths of the spiral threads are arranged between the first central point and the second central point.
4. A three-dimensional helical intracranial thrombectomy stent as defined in claim 1, wherein: the rotary directions of the spiral threads of the filamentous spiral bodies with different diameters between the first central point and the second central point are the same or different.
5. A three-dimensional helical intracranial thrombectomy stent as defined in claim 1, wherein: and the central point I and the central point II are respectively provided with a developing ring or a developing wire.
6. A three-dimensional helical intracranial thrombectomy stent as defined in claim 1, wherein: the spiral body is made of nickel-titanium wires or stainless steel wires.
7. A three-dimensional helical intracranial thrombectomy stent as defined in claim 1, wherein: the maximum diameter of the filamentous spirochetes in the filamentous spirochetes with different diameters sequentially sleeved according to the diameter is set to be 2-7mm, and the minimum diameter of the filamentous spirochetes is set to be 0.2-6 mm.
8. A three-dimensional helical intracranial thrombectomy stent as defined in claim 1, wherein: the diameter of the spiral body is set to be 0.01-0.2 mm.
9. A three-dimensional helical intracranial thrombectomy stent as defined in claim 1, wherein: the length of the spiral body between the first central point and the second central point is set to be 20-60 mm.
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| CN202010716545.8A CN111820990B (en) | 2020-07-23 | 2020-07-23 | Three-dimensional spiral intracranial thrombus removal support |
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| CN202010716545.8A CN111820990B (en) | 2020-07-23 | 2020-07-23 | Three-dimensional spiral intracranial thrombus removal support |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316809A (en) * | 2009-02-20 | 2012-01-11 | 维尔返有限公司 | Instrument for capturing thrombus in blood vessel |
| US20120143231A1 (en) * | 2007-01-18 | 2012-06-07 | Ron French | Systems, methods and devices for removing obstructions from a blood vessel |
| US20140257245A1 (en) * | 1998-05-01 | 2014-09-11 | Microvention, Inc. | Embolectomy Catheters And Methods For Treating Stroke And Other Small Vessel Thromboembolic Disorders |
| CN104840235A (en) * | 2015-06-02 | 2015-08-19 | 湖南瑞康通科技发展有限公司 | Thrombectomy system and controllable thrombectomy apparatus thereof |
| CN106491181A (en) * | 2017-01-16 | 2017-03-15 | 郑州大学第附属医院 | A kind of thrombosis with many helical structures take pin device |
-
2020
- 2020-07-23 CN CN202010716545.8A patent/CN111820990B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140257245A1 (en) * | 1998-05-01 | 2014-09-11 | Microvention, Inc. | Embolectomy Catheters And Methods For Treating Stroke And Other Small Vessel Thromboembolic Disorders |
| US20120143231A1 (en) * | 2007-01-18 | 2012-06-07 | Ron French | Systems, methods and devices for removing obstructions from a blood vessel |
| CN102316809A (en) * | 2009-02-20 | 2012-01-11 | 维尔返有限公司 | Instrument for capturing thrombus in blood vessel |
| CN104840235A (en) * | 2015-06-02 | 2015-08-19 | 湖南瑞康通科技发展有限公司 | Thrombectomy system and controllable thrombectomy apparatus thereof |
| CN106491181A (en) * | 2017-01-16 | 2017-03-15 | 郑州大学第附属医院 | A kind of thrombosis with many helical structures take pin device |
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