CN109480958B - Multi-adaptability multi-tube-diameter thrombus taking device capable of preventing excessive cutting - Google Patents
Multi-adaptability multi-tube-diameter thrombus taking device capable of preventing excessive cutting Download PDFInfo
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- CN109480958B CN109480958B CN201811462303.XA CN201811462303A CN109480958B CN 109480958 B CN109480958 B CN 109480958B CN 201811462303 A CN201811462303 A CN 201811462303A CN 109480958 B CN109480958 B CN 109480958B
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Classifications
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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
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
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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
- A61B17/22004—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 using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—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 using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
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- Health & Medical Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
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- Biomedical Technology (AREA)
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Abstract
The multi-adaptability multi-diameter thrombus taking device capable of preventing excessive cutting comprises a thrombus taking unit tube, wherein the thrombus taking unit tube is provided with a shrinkage form and an expansion form, at least two sections of the thrombus taking unit tube are arranged and sequentially connected into a whole, and at least two sections of the thrombus taking unit tube are respectively provided with different expansion form diameters. The invention has simple structure and convenient use, is designed for the Chinese cerebral apoplexy patients suffering from vascular stenosis, and has the advantages of small operation wound, good flexibility, good radial support, convenient development and positioning, easy assembly and use and good thrombus taking effect as a whole.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a multi-adaptability multi-tube-diameter thrombus remover capable of preventing excessive cutting.
Background
Cerebral stroke (cerebral stroke) is a group of diseases which take cerebral ischemia and hemorrhagic injury symptoms as main clinical manifestations, and according to one result on Circulation in 2017, the prevalence of cerebral stroke in China is 1114.8/10 ten thousand people and 1494 ten thousand people in China. The death rate is 114.8/10 ten thousand people/year, and the death rate is 154 ten thousand people. In addition, the number of patients suffering from cerebral apoplexy in China is continuously increased to 8.7 percent. Cerebral apoplexy has high morbidity, high growth rate and high mortality, and also has high disability rate and high recurrence rate. Cerebral stroke (cerebral stroke) is the first killer to kill the people in China at present, about 60% -80% of surviving cerebral stroke patients suffer from different degrees of disability, serious patients influence normal life, and patients with cerebral stroke medical history have the possibility of relapse within 2-5 years at 1/4~3/4.
Cerebral stroke is classified into hemorrhagic cerebral stroke and ischemic cerebral stroke (ischemic stroke). Ischemic stroke accounts for about 70% of stroke, and due to cerebral ischemia, hemorrhagic stroke causes brain tissue dysfunction and necrosis. In general, thrombosis (brain formation of an occlusive blood clot), embolism (embolism formation from elsewhere), systemic blood supply insufficiency (general systemic blood supply insufficiency, such as shock) and venous thrombosis are the main causes of ischemic stroke.
The key for treating ischemic cerebral apoplexy is to dredge focal blood vessel and maintain normal blood vessel flux. Currently, common therapies are arterial and venous drug thrombolysis and mechanical thrombolysis. The arterial and venous drug therapy generally adopts thrombolytic agents such as tissue plasminogen activator (tissue plasminogen activator, tPA) or urokinase and the like injected at a focus, and although the drug thrombolysis method is widely accepted by international organizations, the application range and effectiveness of the drug thrombolysis are greatly limited by the requirement of time window (intravenous drug thrombolysis needs to be carried out within 3 hours after the onset of the disease and arterial thrombolysis needs to be carried out within 6 hours after the onset of the disease) and the requirement of thrombus and focal vessel outer diameter (the vessel outer diameter is generally more than 8mm and is not suitable for practical drug thrombolysis). However, mechanical thrombolysis has the advantage of breaking these limitations and achieving good therapeutic results. The laser thrombus breaking method in the mechanical thrombus taking method is complex in operation, the mechanical thrombus cutting has great harm to blood vessels, the thrombus catching net thrombus taking method is simple in operation, and the relative trauma to focal blood vessels is small. Although the thrombus capturing net has excellent thrombus capturing effect, the mechanical thrombus capturing device which can be purchased in the market has higher requirements on the design structure and processing production of the device, and to a certain extent, the mechanical thrombus capturing device is difficult to meet the requirements of doctors and patients, especially for the condition of the vascular stenosis accompanied by most Chinese cerebral strokes, the device on the market is difficult to achieve good treatment and the result of smaller wound, and the defects of poor vascular adaptability, thrombus escape, structure flexibility, strength and toughness, and the like are often caused, so that the capturing effect is poor.
Disclosure of Invention
The invention aims to provide a multi-adaptability multi-path thrombus taking device capable of preventing excessive cutting, which solves the problem of poor thrombus capturing effect of the traditional thrombus taking device.
The specific technical scheme of the invention is as follows: the multi-adaptability multi-diameter thrombus taking device capable of preventing excessive cutting comprises a thrombus taking unit tube, wherein the thrombus taking unit tube is provided with a shrinkage form and an expansion form, at least two sections of the thrombus taking unit tube are arranged and sequentially connected into a whole, and at least two sections of the thrombus taking unit tube are respectively provided with different expansion form diameters.
Preferably, the expansion form diameter has a value ranging from 0.5 to 6mm.
Preferably, the thrombus taking unit tube is provided with three sections and is sequentially connected into a whole, so that the distal thrombus taking unit tube, the middle thrombus taking unit tube and the proximal thrombus taking unit tube are mutually distinguished, and the expansion form diameter of the distal thrombus taking unit tube and the proximal thrombus taking unit tube is larger than that of the middle thrombus taking unit tube.
Preferably, the expansion form diameter of the distal thrombolysis unit tube is 0.5-6 mm, the expansion form diameter of the proximal thrombolysis unit tube is 0.5-6 mm, and the expansion form diameter of the intermediate thrombolysis unit tube is 0.4-5 mm.
Preferably, the thrombus removing unit tube comprises a plurality of tendons and a plurality of thrombus removing grids surrounded by the tendons, the tendons are in a continuous or intermittent sine waveform in the axial direction of the thrombus removing unit tube, a plurality of circles of circumferential grid annular bands are arranged on the thrombus removing unit tube along the axial direction of the thrombus removing unit tube, and the circumferential grid annular bands are formed by circumferentially arranging the thrombus removing grids.
Preferably, the mesh areas of the thrombus removal meshes in the same circumferential mesh belt are all the same.
Preferably, at least two circles of circumferential grid endless belts with different grid areas of the thrombolysis grids are arranged on the thrombolysis unit tube.
Preferably, there are two distinct circumferential mesh zones comprising mesh areas of the thrombolytic mesh differing by a factor of two.
Preferably, the two different circumferential mesh bands are staggered along the axial direction of the thrombolysis unit tube.
Preferably, the area of the thrombus removing grid is 2-100 mm 2 。
Preferably, the distal end of the thrombus taking unit tube serving as the initial section of the thrombus taking device is further provided with a special-shaped guide connecting section, and the special-shaped guide connecting section and the thrombus taking unit tube are integrally formed; the special-shaped guide connecting section comprises an initial reinforcement line and a plurality of initial thrombus taking grids surrounded by the initial reinforcement line, and the initial reinforcement line and the initial thrombus taking grids are identical to the reinforcement line and the thrombus taking grids of the thrombus taking unit pipe in structural arrangement; the special-shaped guide connecting section is in an irregular tubular shape with a beveled cross section.
Preferably, a traction wire is connected to the distal end of the special-shaped guide connecting section.
Preferably, a developing section is connected to the starting thread of the special-shaped guide connecting section, the thread of the thrombolysis unit tube, the traction wire, or one or two of the three.
Preferably, one or more initial tendons of the special-shaped guide connecting section, one or more tendons of the thrombus removing unit tube serving as an initial section of the thrombus removing device, and one or two of the traction wire are connected with a head end region developing section.
Preferably, one or more of the tendons of at least one section of the thrombolysis unit tube is connected with a main body region developing section except for the thrombolysis unit tube which is the initial section of the thrombolysis device and the thrombolysis unit tube which is the final section of the thrombolysis device.
Preferably, one or more of the tendons of the thrombolysis unit tube as a final section of the thrombolysis device is connected with a final end region developing section.
Preferably, the adjacent thrombolysis unit tubes are integrally formed.
Preferably, the adjacent thrombus taking unit pipes are respectively and independently segmented, the end part of each thrombus taking unit pipe is provided with a detachable connecting assembly, and the detachable connecting assembly comprises a plurality of groups of first assembly units and second assembly units which are matched with each other;
when two sections of the bolt taking unit pipes are arranged, the first assembly unit is connected to one end of one section of the bolt taking unit pipe, the second assembly unit is connected to one end of the other section of the bolt taking unit pipe, and the adjacent bolt taking unit pipes are mutually matched and connected through the first assembly unit and the second assembly unit;
when the number of the thrombus taking unit pipes exceeds two, the proximal end of the thrombus taking unit pipe serving as the initial section of the thrombus taking device is connected with the first assembly unit or the second assembly unit, the distal end of the thrombus taking unit pipe serving as the final section of the thrombus taking device is connected with the first assembly unit or the second assembly unit, the two ends of each of the rest sections of thrombus taking unit pipes are respectively connected with the first assembly unit and the second assembly unit, and the adjacent thrombus taking unit pipes are mutually matched and connected through the first assembly unit and the second assembly unit.
Preferably, the first assembly unit comprises at least two sections of struts connected to the end of the thrombus taking unit tube and a circular ring part connected to each section of struts, and the second assembly unit comprises at least one connecting section connected to the tendon of the end of the thrombus taking unit tube, wherein the connecting section comprises a first section extending from the tendon, a second section extending from the first section and penetrating around all the circular ring parts, and a third section extending from the second section and spirally winding to be fixed back to the first section.
Preferably, one of the elastic connection sections is connected between the annular portions belonging to the same first assembly unit.
Preferably, two elastic connection sections are connected between the annular portions of the adjacent first component units.
The multi-adaptability multi-tube-diameter thrombus remover for preventing excessive cutting has the technical advantages of simple structure and convenient use, is designed for a Chinese cerebral apoplexy patient suffering from vascular stenosis, and has the advantages of small surgical trauma, good flexibility, good radial support, convenient development and positioning and easy assembly and use as a whole; aiming at a narrow blood vessel at a focus, a plurality of sections are designed, and the pipe sections with different expansion form diameters are aimed at the blood vessel sections with different narrow conditions, so that the adaptability to the blood vessel and the capturing capability to different thrombus taking objects are improved, a plurality of target blood vessel sections are reasonably and effectively cut into and capture thrombus, and thrombus escape caused by complete cutting and blocking of the thrombus is prevented; the design of the thrombus taking grids with various sizes is more beneficial to capturing thrombus with various volumes while ensuring good radial supporting force.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a partial structure of an embodiment of the present invention;
FIG. 3 is a schematic view of a partial structure of an embodiment of the present invention;
FIG. 4 is a schematic view of a partial structure of an embodiment of the present invention;
FIG. 5 is a schematic view of a partial structure of an embodiment of the present invention;
the names of the parts corresponding to the numbers in the figure are respectively as follows: 1-thrombus taking unit tube, 11-fascia, 12-thrombus taking grid, 13-pillar, 14-circular ring part, 141-first elastic connecting section, 142-second elastic connecting section, 15-connecting section, 2-special-shaped guiding connecting section, 21-initial fascia, 22-initial thrombus taking grid, 3-traction wire, a-head end area developing section, b-main body area developing section and c-tail end area developing section.
Detailed Description
The invention will be further illustrated by the following examples, taken in conjunction with the accompanying drawings:
referring to fig. 1, the multi-adaptability multi-tube thrombus removing device capable of preventing excessive cutting comprises a thrombus removing unit tube 1, wherein the thrombus removing unit tube 1 is provided with a shrinking shape and an expansion shape, the thrombus removing unit tube 1 is provided with three sections and sequentially connected into a whole, the distal thrombus removing unit tube, the middle thrombus removing unit tube and the proximal thrombus removing unit tube are mutually distinguished, and the expansion shape diameters of the distal thrombus removing unit tube and the proximal thrombus removing unit tube are larger than the expansion shape diameter of the middle thrombus removing unit tube. The value of the expansion form diameter of the distal thrombus taking unit tube is 5mm, the value of the expansion form diameter of the proximal thrombus taking unit tube is 5mm, and the value of the expansion form diameter of the middle thrombus taking unit tube is 3mm. The three-section thrombus taking unit tube 1 arranged in the way belongs to a thrombus taking device which is basic and complete in function, and the number of the thrombus taking unit tubes 1 is set to be within 20 conventionally, so that the thrombus taking unit tube belongs to more conventionally. The thrombus accumulation amount in the focus blood vessel often has big or small, can put into the blood vessel of different sections with the thrombus unit pipe 1 pertinence in this embodiment and carry out thrombus location and catch, because the ideal thrombus unit pipe 1 pipe diameter just needs to be less than focus department blood vessel pipe diameter relatively, this can reduce metal area of contact in order to reduce the vasospasm phenomenon to a certain extent, prevent simultaneously that thrombus that the thrombus unit pipe 1 pipe diameter is too big and the condition that causes is cut up from appearing, make the main part of thrombus unit pipe 1 inlay comparatively steadily in whole thrombus piece and drive whole thrombus piece, thereby avoid the emergence of the thrombus escape phenomenon that follows. The existing thrombus remover is poor in vascular adaptability to different stenosis conditions, thrombus can not be removed safely and pertinently, the uniform tube diameter of the thrombus remover after expansion often causes certain areas, the vessel wall of the thrombus remover is pressed by different degrees, harmful contact reaction is caused, thrombus on the thrombus remover is easily and completely cut up, and the thrombus remover is difficult to be taken out by fixation and remains in the blood vessel. The technical scheme of the invention aims at different focuses, can flexibly and pointedly set and use the corresponding thrombus taking device, effectively reduces harmful contact reaction, ensures the thrombus taking range, improves the thrombus taking effect and improves the compliance to blood vessels.
Referring to fig. 2, 3 and 4 again, the thrombus removing unit tube 1 includes a plurality of ribs 11 and a plurality of thrombus removing grids 12 surrounded by the ribs 11, the ribs 11 are in a continuous or intermittent sine waveform in the axial direction of the thrombus removing unit tube 1, a plurality of circumferential grid endless belts are arranged on the thrombus removing unit tube 1 along the axial direction thereof, and the circumferential grid endless belts are formed by circumferentially arranging the thrombus removing grids 12. The thrombus extractor can be formed into a tubular structure with meshes by laser engraving a metal base (such as nickel-iron alloy, tungsten, tantalum, stainless steel, gold, cobalt-chromium or other alloys, and the like), or is woven into a tubular structure with meshes by metal wires (such as nickel-iron alloy, tantalum wire, stainless steel wire, gold alloy wire, and the like), and the structures of the reinforcement wire 11 and the thrombus extraction grid 12 are realized by the two methods.
The mesh areas of the thrombus removing meshes 12 in the same circumferential mesh belt are the same, and two different circumferential mesh belt exist, wherein the mesh areas of the thrombus removing meshes 12 contained in the two different circumferential mesh belt differ by one time. The two different circumferential mesh bands are staggered along the axial direction of the embolectomy unit tube 1. The smaller, i.e. basic, embolectomy mesh 12 is shown in approximately a diamond shape; the larger, i.e. one more grid area of the thrombus removing grid 12 can be actually designed into two diamond-shaped basic thrombus removing grids 12, which structurally corresponds to the removal of a section of the reinforcement line 11, so that the two diamonds are combined into a larger parallelogram, and the differential design and staggered arrangement of the grid areas can be clearly understood from the illustration. In addition, the mesh areas of the two thrombolytic meshes 12 are 10mm2 and 20mm2. The structure and the size design are a preferable scheme, and can give consideration to the flexibility and the radial supporting performance of the tube body under the condition of simple structure and easy realization, so that the whole tube body is easy to form and stably use, and the binding force of thrombus and the thrombus remover can be maximally improved. Of course, on the basis of the above, similar larger or smaller changes can be made on the aspect of the grid area difference of the thrombus taking grid 12, the differences of the grid area difference and the grid area difference can be integer or non-integer multiple, the arrangement mode and the grid size can be arranged irregularly, and the supporting performance and the thrombus taking effect are relatively better under the condition of not unnecessarily increasing the structural complexity and the process manufacturing difficulty. Different mesh areas can capture thrombus of different sizes, the capability of capturing thrombus is enhanced, and simultaneously, different thrombus stabilizing meshes can be provided on the three-dimensional space by meshes of different sizes, so that stability in transportation after thrombus capture is effectively provided, and thrombus separation is prevented.
With reference to fig. 1 and 2, the distal end of the thrombolysis unit tube 1 serving as the initial section of the thrombolysis device is also provided with a special-shaped guide connecting section 2, and the special-shaped guide connecting section 2 and the thrombolysis unit tube 1 are integrally formed; the special-shaped guide connecting section 2 comprises a starting reinforcement line 21 and a plurality of starting thrombus taking grids 22 surrounded by the starting reinforcement line 21, wherein the starting reinforcement line 21 and the starting thrombus taking grids 22 are identical to the reinforcement line of the thrombus taking unit tube 1 and the thrombus taking grids 12 in structural arrangement; the profiled guiding connection section 2 is irregularly tubular with a beveled cross section. That is, the structural composition and unit design of the actual special-shaped guide connecting section 2 are the same as those of the thrombus taking unit tube 1, except that the shape and arrangement are different. The connection part of the special-shaped guide connection section 2 and the thrombus removing unit tube 1 can be a connection rib section which is formed by connecting an initial rib line 21 and a rib line 11 together and forms a common thrombus removing grid which is the same as the initial thrombus removing grid 22 and the thrombus removing grid 12, and can be just a connection rib section which is connected into a whole. The irregular tubular shape is understood herein to correspond to a tubular body left after a cylindrical tube is cut off a part obliquely from the side. The shape of the shaped guide connecting section 2 is preferably selected in the embodiment, and the shape is understood to be that the shape is inclined from the upper bottom surface to the lower bottom surface of a circular tube at the maximum inclination angle until the circular tube is divided into two symmetrical halves, and the triangular-like shaped guide connecting section 2 is connected with the traction wire 3 at the distal end of the shaped guide connecting section 2, namely the tip of the triangular-like shaped guide connecting section, so that the phenomenon that the stressed distal end forms a cone shape due to the fact that the thrombus extractor bends along with the blood vessel is avoided under the condition that the thrombus extractor runs in a bent blood vessel and is in a normal tubular shape.
With reference to fig. 2, 3 and 4, one or more initial tendons 21 of the special-shaped guiding connection section 2, one or more tendons 11 of the thrombolytic unit tube 1 serving as an initial section of the thrombolytic device, and one or two of the traction wires 3 are connected with a head end region developing section a. In addition to the thrombolytic unit tube 1 as the initial section of the thrombolytic device and the thrombolytic unit tube 1 as the final section of the thrombolytic device, one or more tendons 11 of at least one of the thrombolytic unit tubes 1 are connected with the main body region development section b. One or more tendons 11 of the thrombolysis unit tube 1 as a final section of the thrombolysis device are connected with a tail end region developing section c. In this embodiment, the head end region developing section a is connected to the traction wire 3 and between the special-shaped guiding connecting section 2 and the bolt taking unit tube 1 of the initial section, the main body region developing section b is connected to the rib line 11 of the bolt taking unit tube with a larger bolt taking grid 12, the tail end region developing section c is connected to the proximal end of the bolt taking unit tube 1 of the tail end, the multiple sections all have developing structures, the whole body is developed, the developing structures are arranged at reasonable and effective positions, the optimal arrangement in the structure is ensured while the developing and positioning in the operation are facilitated, the number and the specific position are reasonable, and the structural strength of the bolt taking device is not affected. The development structure is evenly distributed on one circle of the circumference of the thrombus remover to achieve the maximum development effect, and the development structure can be connected and fixed with the thrombus remover by welding development substances (such as platinum, gold, tantalum and the like) or winding development wires (such as platinum, gold, tantalum and the like).
The thrombus remover can be integrally formed or independently segmented. When the integrated forming is carried out, although the thrombus remover has a multi-section structure, the thrombus remover can be formed by cutting a pipe by laser, and can be matched with a die for post-treatment shaping for the design of different pipe diameters; or weaving metal, alloy or polymer wires, and then performing post-treatment shaping by matching with a die in the later period; the printing ink can be formed by 3D printing and surface treatment is carried out at a later stage, and the modes can be realized by utilizing the existing mature technology. When the separate segments are used, the manufacturing method is suitable for each separate segment, and the adjacent bolt taking unit pipes 1 can be connected into a whole through welding, riveting, pressing holding, braiding and other connecting modes existing in the field.
In this embodiment, a connection mode corresponding to the independent segment form is specifically designed, see fig. 5. Namely, the adjacent thrombus taking unit pipes 1 are detachably connected, the end parts of the thrombus taking unit pipes 1 are provided with detachable connecting components, and the detachable connecting components comprise a plurality of groups of first component units and second component units which are matched with each other; when two sections of the bolt taking unit pipes 1 are arranged, the first assembly unit is connected to one end of one section of the bolt taking unit pipe 1, the second assembly unit is connected to one end of the other section of the bolt taking unit pipe 1, and the adjacent bolt taking unit pipes 1 are mutually matched and connected through the respective first assembly units and the second assembly units; when more than two sections of the thrombus taking unit pipes 1 are arranged, the proximal end of the thrombus taking unit pipe 1 serving as the initial section of the thrombus taking device is connected with a first component unit or a second component unit, the distal end of the thrombus taking unit pipe 1 serving as the final section of the thrombus taking device is connected with the first component unit or the second component unit, the two ends of each of the rest of the thrombus taking unit pipes 1 are respectively connected with the first component unit and the second component unit, and the adjacent thrombus taking unit pipes 1 are mutually matched and connected through the respective first component unit and second component unit, and in the embodiment, 3 sections of thrombus taking unit pipes are arranged, so that the concrete setting of the later is selected.
The first assembly unit comprises at least two sections of struts 13 connected to the reinforcement wire 11 at the end of the thrombus taking unit tube 1 and a circular ring part 14 connected to each section of struts 13, the second assembly unit comprises at least one connecting section 15 connected to the reinforcement wire 11 at the end of the thrombus taking unit tube 1, and the connecting section 15 comprises a first section extending from the reinforcement wire 11, a second section extending from the first section and bypassing all the circular ring parts 14, and a third section extending from the second section and spirally winding to be fixed back to the first section. It will also be more clearly understood from the illustration that the struts 13 of the first module unit are bifurcated, and have a common end connected to the tendons 11 at the end of the thrombolytic unit tube 1 (which is also the common connection point for the tendons 11 that form some of the thrombolytic grids 12), and that the presence of the two annular portions 14 and the connection with the one-segment engagement segment 15 ensure, under a reasonable number of settings and cost control, that the connection is sufficiently stable to accommodate the action of the thrombolytic unit tube 1 during pushing. The linking section 15 itself is thicker relative to the rib 11, sets up the spiral line on the first section, and the third section is twined back to match with the spiral line, and the first section can further carry out welded fastening with the third section, and pillar 13 and linking section 15 itself can with rib 11 integrated into one piece, also can later stage be through the mould processing design, for example conventional mode such as welding. The detachable connecting assembly not only can realize the connection between each independent segment, but also can realize flexible segment arrangement aiming at different narrow blood vessels, and can also meet the flexibility and stability required by the conditions of bending, torsion and the like of the thrombus extractor in the intravascular pushing process. Further, one of the elastic connection sections 141 is connected between the annular portions 14 belonging to the same first assembly unit, and the other two of the elastic connection sections 142 are connected between the annular portions 14 belonging to adjacent first assembly units, so that flexibility and stability can be effectively improved, and the elastic connection sections can follow the actions such as bending and twisting of the thrombus taking unit tube 1, so that stable and firm connection states and smooth actions can be ensured.
Claims (8)
1. The utility model provides a prevent excessive cutting's multi-adaptability multitube footpath thrombus extraction ware, includes bolt extraction unit pipe (1), bolt extraction unit pipe (1) have shrink form and inflation form, its characterized in that: the thrombus taking unit tube (1) is provided with at least two sections and is sequentially connected into a whole, wherein the at least two sections of the thrombus taking unit tube (1) respectively have different expansion form diameters;
the thrombus taking unit tube (1) comprises a plurality of rib lines (11) and a plurality of thrombus taking grids (12) surrounded by the rib lines (11), wherein the rib lines (11) are in a continuous or intermittent sine waveform in the axial direction of the thrombus taking unit tube (1), a plurality of circles of circumferential grid endless belts are arranged on the thrombus taking unit tube (1) along the axial direction of the thrombus taking unit tube, and the circumferential grid endless belts are formed by circumferentially arranging the thrombus taking grids (12);
the adjacent bolt taking unit pipes (1) are respectively in independent sections, a detachable connecting assembly is arranged at the end part of each bolt taking unit pipe (1), and comprises a plurality of groups of matched first assembly units and second assembly units, specifically, when the bolt taking unit pipes (1) are provided with two sections, the first assembly units are connected to one end of one section of the bolt taking unit pipe (1), the second assembly units are connected to one end of the other section of the bolt taking unit pipe (1), and the adjacent bolt taking unit pipes (1) are mutually matched and connected through the respective first assembly units and the second assembly units; when more than two sections of the thrombus removing unit pipes (1) are arranged, the proximal ends of the thrombus removing unit pipes (1) serving as the initial section of the thrombus removing device are connected with the first assembly units or the second assembly units, the distal ends of the thrombus removing unit pipes (1) serving as the final section of the thrombus removing device are connected with the first assembly units or the second assembly units, the two ends of each of the rest sections of the thrombus removing unit pipes (1) are respectively connected with the first assembly units and the second assembly units, and the adjacent thrombus removing unit pipes (1) are mutually matched and connected through the respective first assembly units and second assembly units;
the first assembly unit comprises at least two sections of struts (13) connected to the reinforcement wire (11) at the end of the thrombus removal unit tube (1) and a circular ring part (14) connected to each section of struts (13), the second assembly unit comprises at least one connecting section (15) connected to the reinforcement wire (11) at the end of the thrombus removal unit tube (1), and the connecting section (15) comprises a first section extending from the reinforcement wire (11), a second section extending from the first section and penetrating all the circular ring parts (14) and a third section extending from the second section and spirally winding to be fixed back to the first section;
the value range of the diameter of the expansion form is 0.5-6 mm;
one elastic connecting section (141) is connected between the annular parts (14) belonging to the same first assembly unit; or/and a second elastic connecting section (142) is connected between the annular parts (14) belonging to the adjacent first assembly units.
2. The over-cut prevention multi-adaptive multi-diameter thrombolytic device of claim 1, wherein: the thrombus taking unit tube (1) is provided with three sections and is sequentially connected into a whole, the distal thrombus taking unit tube, the middle thrombus taking unit tube and the proximal thrombus taking unit tube are distinguished from each other, and the expansion form diameter of the distal thrombus taking unit tube and the expansion form diameter of the proximal thrombus taking unit tube are larger than those of the middle thrombus taking unit tube.
3. The over-cut prevention multi-adaptive multi-diameter thrombolytic device of claim 2, wherein: the expansion form diameter of the distal thrombus taking unit tube is 0.5-6 mm in value, the expansion form diameter of the proximal thrombus taking unit tube is 0.5-6 mm in value, and the expansion form diameter of the middle thrombus taking unit tube is 0.4-5 mm in value.
4. The over-cut prevention multi-adaptive multi-diameter thrombolytic device of claim 1, wherein: the mesh areas of the thrombus removal meshes (12) in the same circumferential mesh belt are the same; at least two circles of circumferential grid endless belts with different grid areas of the thrombus removing grids (12) are arranged on the thrombus removing unit tube (1).
5. A multi-adaptive multi-diameter thrombolytic device as claimed in claim 3 wherein: -there are two distinct circumferential mesh zones comprising mesh areas of the thrombolytic mesh (12) differing by a factor of two; the two different circumferential mesh belts are staggered along the axial direction of the thrombus taking unit tube (1).
6. The over-cut resistant multi-adaptive multi-diameter thrombolytic device according to claim 4 or 5 wherein: the area range of the thrombus taking grid (12) is 2-100 mm 2 。
7. The over-cut prevention multi-adaptive multi-diameter thrombolytic device of claim 1, wherein: the distal end of the thrombus taking unit tube (1) serving as the initial section of the thrombus taking device is also provided with a special-shaped guide connecting section (2), and the special-shaped guide connecting section (2) and the thrombus taking unit tube (1) are integrally formed; the special-shaped guide connecting section (2) comprises an initial reinforcement line (21) and a plurality of initial thrombus taking grids (22) surrounded by the initial reinforcement line (21), and the initial reinforcement line (21) and the initial thrombus taking grids (22) are identical to the reinforcement line and the thrombus taking grids (12) of the thrombus taking unit pipe (1) in structural arrangement; the special-shaped guide connecting section (2) is in an irregular tubular shape with a beveled cross section; the far end of the special-shaped guide connecting section (2) is connected with a traction wire (3).
8. The over-cut resistant multi-adaptive multi-diameter thrombolytic device of claim 7 wherein: the developing section is connected to the initial reinforcement line (21) of the special-shaped guide connecting section (2), the reinforcement line (11) of the thrombus removing unit tube (1) and the traction wire (3) or one or two of the three.
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| CN201811462303.XA CN109480958B (en) | 2018-12-03 | 2018-12-03 | Multi-adaptability multi-tube-diameter thrombus taking device capable of preventing excessive cutting |
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| CN201811462303.XA CN109480958B (en) | 2018-12-03 | 2018-12-03 | Multi-adaptability multi-tube-diameter thrombus taking device capable of preventing excessive cutting |
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| CN109480958B true CN109480958B (en) | 2023-12-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021136380A1 (en) * | 2019-12-30 | 2021-07-08 | 杭州德诺脑神经医疗科技有限公司 | Thrombus retrieving device and thrombus retrieving system |
| CN113116455B (en) * | 2019-12-31 | 2023-10-24 | 辽宁垠艺生物科技股份有限公司 | High-support Gao Roushun network management structure |
| CN111513811B (en) * | 2020-04-28 | 2021-05-11 | 上海心玮医疗科技股份有限公司 | Asymmetric three-dimensional spiral embolectomy support |
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