CN116269649A - Vascular thrombus clearing device - Google Patents
Vascular thrombus clearing device Download PDFInfo
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- CN116269649A CN116269649A CN202310326642.XA CN202310326642A CN116269649A CN 116269649 A CN116269649 A CN 116269649A CN 202310326642 A CN202310326642 A CN 202310326642A CN 116269649 A CN116269649 A CN 116269649A
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- 208000007536 Thrombosis Diseases 0.000 title claims abstract description 186
- 230000002792 vascular Effects 0.000 title claims abstract description 26
- 230000002537 thrombolytic effect Effects 0.000 claims description 12
- 241001589086 Bellapiscis medius Species 0.000 claims description 8
- 239000003146 anticoagulant agent Substances 0.000 claims description 5
- 230000008030 elimination Effects 0.000 claims 3
- 238000003379 elimination reaction Methods 0.000 claims 3
- 208000010378 Pulmonary Embolism Diseases 0.000 abstract description 16
- 206010024796 Logorrhoea Diseases 0.000 abstract description 13
- 238000004140 cleaning Methods 0.000 abstract description 13
- 230000017531 blood circulation Effects 0.000 abstract description 8
- 239000008280 blood Substances 0.000 abstract description 5
- 210000004369 blood Anatomy 0.000 abstract description 5
- 210000004204 blood vessel Anatomy 0.000 description 31
- 239000010410 layer Substances 0.000 description 21
- 210000001147 pulmonary artery Anatomy 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 210000003462 vein Anatomy 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 210000003141 lower extremity Anatomy 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000002560 therapeutic procedure Methods 0.000 description 4
- 230000000004 hemodynamic effect Effects 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 206010014522 Embolism venous Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000010100 anticoagulation Effects 0.000 description 1
- 230000005794 circulatory dysfunction Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 208000004043 venous thromboembolism Diseases 0.000 description 1
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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
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
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- Life Sciences & Earth Sciences (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
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Abstract
The invention relates to the technical field of thrombus removal, in particular to a vascular thrombus removal device, which comprises: the inner cavity of the thrombus cleaning catheter is provided with a conveying guide wire which extends along the axial direction of the thrombus cleaning catheter; the broken bolt assembly is fixedly arranged on the conveying guide wire, a plurality of broken bolt edges are arranged on the outer wall of the broken bolt assembly, and the broken bolt edges extend along the axial direction of the conveying guide wire; the thrombus taking assembly is arranged on the conveying guide wire and is arranged between the thrombus breaking assembly and the head of the conveying guide wire. The conveying guide wire is rotated to drive the thrombus breaking assembly to rotate, thrombus breaking edges on the thrombus breaking assembly cut thrombus, and blank areas between the thrombus cleaning edges can be used for supplying blood and flowing, so that the influence of the thrombus cleaning device on blood flow during thrombus cleaning is reduced. Through set up garrulous bolt edge on garrulous bolt subassembly, the increase is to loose, the cutting force of viscous thrombus, can break up the thrombus fast, can promote the operation efficiency of pulmonary embolism treatment, shortens operation time.
Description
Technical Field
The invention relates to the technical field of thrombus removal, in particular to a vascular thrombus removal device.
Background
Acute pulmonary embolism is the most severe manifestation of venous thromboembolism, the third leading cause of cardiovascular death next to coronary heart disease and stroke. Recent epidemiological data show that the mortality rate of high-risk pulmonary embolism in 30 days can reach 22%, the mortality rate of medium-risk pulmonary embolism is 5-8 times that of low-risk pulmonary embolism, and the best treatment should be given as early as possible, thereby being expected to improve the prognosis of patients.
The interventional therapy is an effective treatment method for rapidly improving circulatory dysfunction of patients with acute pulmonary embolism above medium risk, and along with the development of foreign interventional instruments and technologies, the interventional therapy is possible, and has the characteristics of high safety, small technical difficulty, small damage and high curative effect, and particularly has become the first choice for critical pulmonary embolism after operation, and emergency interventional therapy when thrombolysis and anticoagulation therapy are difficult to be implemented clinically. The interventional thrombus taking device has the advantages of small trauma, short postoperative recovery time, few complications after treatment, good operation effect and the like.
The products for treating venous embolism in the prior art are mostly aimed at blood vessels with small blood vessel diameters and linear blood vessel shapes, such as lower limb veins. The pulmonary embolism treatment faces the problems that the diameter of a blood vessel is relatively large, the wall of the blood vessel is thin, the morphology is irregular, the thrombus amount is more than that of other veins, and the thrombus is a loose and sticky structure mainly comprising red thrombus, so that an intravascular thrombus taking product in the prior art cannot be suitable for treating pulmonary embolism or has extremely low thrombus taking efficiency, and is difficult to effectively and rapidly remove a large amount of thrombus in the blood vessel.
Disclosure of Invention
Therefore, the invention aims to overcome the defect of low thrombus removing efficiency of the thrombus removing device in the prior art when the thrombus is removed from the blood vessel, thereby providing the blood vessel thrombus removing device.
In order to solve the above technical problems, the present invention provides a vascular thrombus removal device, comprising:
the inner cavity of the thrombus cleaning catheter is provided with a conveying guide wire which extends along the axial direction of the thrombus cleaning catheter;
the broken bolt assembly is arranged on the conveying guide wire, the outer wall of the broken bolt assembly is provided with a plurality of broken bolt edges, and the broken bolt edges extend along the axial direction of the conveying guide wire;
the thrombus taking assembly is arranged on the conveying guide wire and is arranged between the thrombus breaking assembly and the head of the conveying guide wire.
Optionally, the broken bolt component is of a net shell structure, and the outer side wall of the broken bolt component is of a spindle type.
Optionally, the cross-sectional shape of the bolt breaking assembly perpendicular to the axial direction thereof is a hexagonal star shape.
Optionally, the outer side wall of the thrombus taking assembly along the axial direction is arc-shaped.
Optionally, the thrombolysis assembly is rotatably mounted on the delivery guidewire.
Optionally, the head of the delivery guidewire is fixedly mounted with a fixed bullet.
Optionally, a guidewire twister is mounted on the tail of the delivery guidewire.
Optionally, the thrombus taking assembly is provided with at least two layers of basket bodies sleeved, and an accommodating space for accommodating thrombus is reserved between the adjacent basket bodies.
Optionally, the thrombus taking assembly is provided with two layers of sleeved basket bodies, and the depth of the outer layer basket body is not less than twice the depth of the inner layer basket body.
Optionally, the basket body is an elastic structural member, and a limiting member is arranged on the conveying guide wire between the adjacent basket bodies.
The technical scheme of the invention has the following advantages:
1. the present invention provides a vascular thrombus removal device comprising: the inner cavity of the thrombus cleaning catheter is provided with a conveying guide wire which extends along the axial direction of the thrombus cleaning catheter; the broken bolt assembly is arranged on the conveying guide wire, the outer wall of the broken bolt assembly is provided with a plurality of broken bolt edges, and the broken bolt edges extend along the axial direction of the conveying guide wire; the thrombus taking assembly is arranged on the conveying guide wire and is arranged between the thrombus breaking assembly and the head of the conveying guide wire.
When utilizing vascular thrombus clearing device to clear away the thrombus in the blood vessel, carry the guide wire head portion and stretch into in the blood vessel, drive garrulous bolt subassembly and enter into the thrombus position, make the downstream that the thrombus position is located to get the bolt subassembly, rotate and carry the guide wire and drive garrulous bolt subassembly and rotate, garrulous bolt edge on the garrulous bolt subassembly cuts the thrombus, make thrombus clearing device exert great rotatory radial cutting force to the thrombus, clear blank area between the bolt edge can flow through, clear the influence of bolt device to the blood flow when reducing clear the thrombus. The thrombus is driven by the blood flow to enter the thrombus taking component after falling off from the inner wall of the blood vessel. After the thrombus on the inner wall of the blood vessel is cleaned, the conveying guide wire is taken out, and the thrombus taking assembly can be driven to take the thrombus out of the human body, so that thrombus cleaning operation is completed. The thrombus of the pulmonary embolism comes from the vein of the lower limb, is a loose and sticky structure taking the red thrombus as a main part, is difficult to clear, and can be quickly broken by increasing the cutting force to the thrombus by arranging the thrombus breaking edge on the thrombus breaking assembly, so that the operation efficiency of the pulmonary embolism treatment can be improved, and the operation time is shortened.
2. The invention provides a vascular thrombus removing device, wherein a broken bolt component is of a net shell structure, and the outer side wall of the broken bolt component is in a spindle shape. The broken bolt component is arranged to be bulged in the middle, and two ends of the broken bolt component are of conical spindle type structures, so that resistance when the broken bolt component advances and retreats in a blood vessel can be reduced, and the broken bolt component can conveniently enter and exit in the blood vessel.
3. The invention provides a vascular thrombus removing device, wherein a thrombus removing assembly is rotatably arranged on a conveying guide wire. When carrying out the thrombus and clear away the operation, rotate and carry the seal wire, carry the seal wire and drive garrulous bolt subassembly and rotate, get and rotate the cooperation between bolt subassembly and the seal wire, get the bolt subassembly and can not rotate along with carrying the seal wire, can reduce the damage to the blood vessel inner wall, promote the safety of thrombus and clear away the operation, help patient's postoperative quick recovery.
4. The thrombus removing assembly comprises at least two layers of basket bodies sleeved with each other, and an accommodating space for accommodating thrombus is reserved between the adjacent basket bodies. The thrombus of the pulmonary embolism comes from the vein of the lower limb, is a loose and sticky structure mainly comprising red thrombus, is extremely easy to break and drop the far end in the thrombus pulling process, blocks the suction catheter during back suction, and further causes the problems of unstable hemodynamics and low suction efficiency in the treatment process. Through setting up the net basket body that at least two-layer cover was established with the thrombus subassembly, can solve in the past thrombus clearance inefficiency, thrombus slippage scheduling problem.
5. According to the vascular thrombus removing device provided by the invention, the basket bodies are elastic structural members, and the limiting members are arranged on the conveying guide wires between the adjacent basket bodies. When carrying out thrombus and clear away the operation, the thrombus subassembly stretches into human blood vessel, and the low reaches of thrombus position, the open end of basket body closely laminates on the blood vessel inner wall under the elasticity effect, and basket body bottom is spacing on carrying the seal wire. After the thrombus is crushed, the crushed thrombus flows downstream along with blood to the blood vessel, the thrombus is collected by the basket body, and the blood flows through the holes of the basket body. Carry out spacingly through the locating part to the basket body for every basket body only can slide in predetermined space, avoids the multilayer basket body to take place to pile up under the extrusion effect of blood and thrombus and causes the accommodation space that is used for splendid attire thrombus to diminish. The elasticity that utilizes the basket body makes basket body open end closely laminate the vascular inner wall, can avoid finely garrulous thrombus to leak away from the basket body outside, utilizes the locating part to restrict the position of every basket body in order to keep accommodation space's volume simultaneously, can improve the clearance degree of thrombus.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a vascular thrombus removal device provided in an embodiment of the present invention.
Fig. 2 is a schematic structural view of a bolt breaking assembly according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a bolt breaker assembly provided in an embodiment of the invention.
Fig. 4 is a schematic structural view of a thrombus removal assembly according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a thrombus removal assembly according to another embodiment of the present invention.
Reference numerals illustrate: 1. a thrombus cleaning catheter; 2. delivering a guidewire; 3. a bolt breaking assembly; 4. breaking the edge of the bolt; 5. a bullet fixing device; 6. a guidewire twister; 7. a thrombus extraction assembly; 8. and a limiting piece.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
Fig. 1 to 5 show a vascular thrombus removal device according to the present embodiment, comprising: a thrombus cleaning catheter 1, a thrombus breaking assembly 3 and a thrombus taking assembly 7.
The inner cavity of the thrombolytic catheter 1 is provided with a conveying guide wire 2, and the conveying guide wire 2 extends along the axis direction of the thrombolytic catheter 1. The broken bolt assembly 3 is arranged on the conveying guide wire 2, a plurality of broken bolt edges 4 are arranged on the outer wall of the broken bolt assembly 3, and the broken bolt edges 4 extend along the axial direction of the conveying guide wire 2. The thrombus taking assembly 7 is arranged on the conveying guide wire 2, and the thrombus taking assembly 7 is arranged between the thrombus breaking assembly 3 and the head of the conveying guide wire 2.
In order to facilitate the advancing and retreating of the thrombus breaking assembly 3 in the blood vessel and the thrombus cleaning catheter 1, the thrombus breaking assembly 3 is of a net shell structure, and the outer side wall of the thrombus breaking assembly 3 is in a spindle shape. The outer side wall of the thrombus taking assembly 7 along the axial direction is arc-shaped. If the broken bolt assembly 3 encounters an obstacle to be blocked when moving in the blood vessel or the clear bolt guide pipe 1, the broken bolt assembly 3 with the net shell structure can be easily deformed to pass over the obstacle. The spindle-shaped appearance makes both ends all be the toper around the garrulous bolt subassembly 3, and the lateral wall of taking the bolt subassembly 7 is arc in following the axis direction moreover, can reduce the resistance that garrulous bolt subassembly 3 moved in blood vessel and clear bolt pipe 1 greatly for garrulous bolt subassembly 3 can have the blood vessel of thrombus at the inner wall and advance smoothly. In order to ensure the thrombus breaking efficiency of the thrombus breaking assembly 3 and ensure that blood can smoothly pass through the region between the thrombus breaking edges 4, the influence of the thrombus breaking assembly 3 on the blood flow is reduced, and as shown in fig. 3, the cross section of the thrombus breaking assembly 3 perpendicular to the axial direction of the thrombus breaking assembly is hexagonal star-shaped, so that six thrombus breaking edges 4 are arranged on the outer side wall of the thrombus breaking assembly 3.
When the vascular thrombus clearing device provided by the embodiment is utilized to break thrombus, the conveying guide wire 2 is rotated to drive the thrombus breaking assembly 3 to rotate, and the thrombus breaking edge 4 breaks thrombus, so that the thrombus falls off from the inner wall of the blood vessel. In order to avoid damage to the inner wall of the blood vessel caused by the thrombus taking-out assembly 7 when the conveying guide wire 2 is rotated. The thrombolysis unit 7 in this embodiment is rotatably mounted on the delivery guidewire 2. The head of the conveying guide wire 2 is fixedly provided with a fixed bullet 5. The bullet 5 of the stator wraps the end of the conveying guide wire to prevent the conveying guide wire from scratching the blood vessel. A guide wire twister 6 is arranged at the tail part of the conveying guide wire 2.
In order to improve the collection capacity of the thrombus taking assembly 7 on the tiny thrombus, the thrombus taking assembly 7 is provided with at least two layers of basket bodies sleeved with each other, and an accommodating space for accommodating the thrombus is reserved between every two adjacent basket bodies. The thrombus taking assembly 7 in the embodiment is provided with two layers of sleeved basket bodies, and the depth of the outer layer basket body is not smaller than twice the depth of the inner layer basket body, so that enough accommodating space can be reserved in the outer layer basket body to store thrombus passing over the inner layer basket. Meanwhile, the basket bodies are elastic structural members, and limit stops serving as limit pieces 8 are arranged on the conveying guide wires 2 between the adjacent basket bodies. The elasticity of the basket body is utilized to enable the opening end of the basket body to be closely attached to the inner wall of a blood vessel, so that fine thrombus can be prevented from leaking from the outer side of the basket body, and the removal degree of the thrombus can be improved. In other embodiments, the thrombus taking assembly 7 may be provided with three, four or more layers of basket bodies, and the specific number of layers may be adjusted according to actual requirements, and the mesh size of the basket body close to the head of the conveying guide wire 2 is smaller than that of the basket body far away from the head of the conveying guide wire 2.
The existing mechanical thrombus removing device is a thrombus pulling structure consisting of three nickel plates, the diameters of the three nickel plates are consistent, and the device mainly aims at the main pulmonary artery and the left and right main pulmonary arteries, and achieves the aim of rapidly removing massive thrombus in the processes of stent release, pulling and recovery. However, in clinical application, after a great deal of imaging analysis on pulmonary embolism cases of Chinese people, most of the dangerous pulmonary artery thrombi in Chinese people are mostly in the level of pulmonary lobes and segments, the blood vessels are uneven in thickness and different in length, and the critical pulmonary artery thrombi and the pulmonary artery trunks form an angle of 60-70 degrees. The diameter and the length of a nickel disc of the mechanical thrombus removing device in the prior art are not in accordance with the thrombus position and the arterial structural characteristics of the pulmonary artery of the national people, so that the thrombus removing stent is difficult to release, the removing efficiency is reduced and the vascular wall is damaged. In addition, the thrombus of the pulmonary embolism comes from a vein of a lower limb, is a loose and sticky structure mainly comprising red thrombus, is extremely easy to break and fall off a far end in the thrombus pulling process, blocks a suction catheter during back suction, and further causes the problems of unstable hemodynamics and low suction efficiency in the treatment process.
The thrombus breaking assembly and the thrombus taking assembly matched with each other can play a role in rapidly breaking thrombus to cause pulmonary embolism, and on the other hand, the thrombus breaking device can achieve the effects of fully intercepting, rapidly recovering and removing thrombus. The vascular thrombus clearing device provided in the embodiment is based on national pulmonary artery anatomical big data, designs various thrombus breaking and thrombus taking basket diameters, radians and lengths, meets the requirements of national pulmonary artery structures, and can achieve an accurate pulmonary embolism clearing effect. Specifically, the bolt breaking assembly is shown in fig. 2. D of bolt breaking device 2 Is the diameter of the highest point of the arc (the diameter is 8-23 mm), D 1 Is of low point diameter (diameter is 5-20 mm), L is the length (length is 10-30 mm) of the whole bolt breaking assembly. A side view of the cock assembly is shown in fig. 3.
The thrombus removing assembly is shown in fig. 4, and the thrombus removing assembly L 1 The position is the length (length is 5-20 mm) of the inner layer basket body, L 2 Is the length (length is 10-30 mm) of the outer layer basket body, L 3 For supporting the position of the blood vessel (length is 5-28 mm), D is the diameter of the thrombus taking basket (diameter is 12-30 mm). In another embodiment, the thrombus removing assembly can also be in the shape of a single-layer basket as shown in fig. 5, steel caps at two ends of the single-layer basket are hollow, the basket is not influenced by the rotation of the conveying guide wire, a limit stop is arranged on the guide wire in the middle of the steel caps, and the basket can move left and right along the conveying guide wire within the limit range between the limit stop and a fixed bullet at the head end of the conveying guide wire.
Two ends of the broken bolt component are arranged on the conveying guide wire through two steel caps, as shown in fig. 1, the steel caps on the left side of the broken bolt component are fixedly connected with the conveying guide wire, the steel caps on the right side of the broken bolt component are movably connected with the conveying guide wire, and the broken bolt component is conveniently compressed and then is input into the clear bolt guide pipe. The bolt breaking assembly can be lengthened after being compressed, and the steel cap on the right side of the bolt breaking assembly moves rightwards, so that the bolt breaking assembly can be compressed smoothly. The steel caps at the bottoms of the two layers of basket bodies of the bolt taking assembly are hollow, so that the basket bodies can move left and right on the conveying guide wires, and a limit stop is arranged between the two layers of basket bodies to limit the displacement amplitude of the two basket bodies. Both the breaking and the taking bolt components are made of elastic threads with shape memory function, and the diameter of the elastic threads is 0.001mm to 1mm. The breaking and taking-out components have high elastic memory property, can be compressed and then enter the clear-bolt guide tube, and can be automatically unfolded into a shape before folding and compression when released from the clear-bolt guide tube.
The operation schematic diagram of the breaking bolt assembly and the taking bolt assembly when being matched is shown in figure 1. The bolt taking assembly is installed near the head of the conveying guide wire, the bolt breaking assembly is installed on one side, deviating from the head of the conveying guide wire, of the bolt taking assembly, the head of the conveying guide wire is a fixed bullet, and the tail of the conveying guide wire is a guide wire twister. Wherein garrulous bolt subassembly is fixed with the conveying guide wire, and rotatory guide wire twister can drive garrulous bolt subassembly through the conveying guide wire and rotate, and the bolt basket of getting is fixed with the direct position of conveying guide wire, and normal running fit, the bolt basket of getting when the guide wire is rotatory promptly does not rotate, owing to the existence of the stopper of stator warhead, can restrict the position of getting the bolt basket. During normal operation, the thrombus taking assembly is conveyed to the corresponding position, the conveying guide wire is rotated in vitro, the thrombus crushing assembly is driven to cut thrombus, and the thrombus is driven to the thrombus taking assembly through blood flow. The double-layer basket body increases the density of the basket and can improve the blocking effect of the thrombus taking assembly. And when the thrombus is removed, the suction catheter can be inserted to the vicinity of the thrombus taking assembly to suck, so that the finely crushed thrombus is sucked away, and the thrombus is removed.
The thrombus removal device provided by the embodiment has the advantages of simple structure, convenience in operation and easiness in use of operators. Firstly, the bolt breaking assembly adopts a hexagonal prismatic design, and the structure accords with the physiological characteristics of thick internal diameter of pulmonary artery, thin tube wall and easy deformation, has the advantage of large rotary radial cutting force, can reduce the damage to the wall of a blood vessel, and improves the bolt breaking efficiency; the non-corner blank part can provide more blood flow passing space, so that the influence on blood flow dynamics is reduced; the hexagonal prismatic sagittal plane of the thrombus breaking component is in a spindle shape, so that the thrombus breaking component can conveniently enter and exit the catheter and the blood vessel, the passing rate is increased, and the operation time is shortened. The thrombus taking assembly is designed into a structure with an elastic double-layer basket, so that the radial supporting force of the thrombus taking assembly can be increased, and broken thrombus is prevented from escaping. The blocking efficiency of the double-layer net basket body to the finely crushed thrombus can be further improved. When in thrombus removal operation, the thrombus breaking component and the thrombus taking component are matched for use. The broken bolt assembly and the conveying guide wire are fixed in position, namely, the broken bolt assembly rotates when the conveying guide wire rotates, and the bolt taking basket is limited and does not rotate due to the existence of the bullet limit stopper of the stator. When the thrombus removing device works, the guide wire is firstly rotated and conveyed to drive the thrombus crushing device to crush thrombus, then the suction catheter is used for sucking, and the thrombus removing assembly is pulled in a matching manner, so that the thrombus removing effect is finally achieved. The combined application of the thrombus taking assembly and the thrombus breaking assembly can play a role in rapidly breaking thrombus and preventing the suction catheter from blocking the tube, and can also utilize the thrombus breaking assembly to rapidly intercept, recover and clear the thrombus. Comprehensively solves the technical problems of unstable hemodynamics caused by the existing products such as viscous thrombus blocking catheter, low recovery efficiency and thrombus shedding.
In an alternative embodiment, the delivery guidewire includes a rotationally coupled fixed segment and a twisted segment, the thrombolytic assembly is mounted to the twisted segment, and the thrombolytic assembly is mounted to the fixed segment. The head of the fixed section is provided with a fixed bullet. A guide wire twister is arranged at the tail part of the twisting section. The guide wire twister is rotated to drive the twisting section of the conveying guide wire to rotate, and the bolt breaking assembly arranged on the twisting section rotates together with the twisting section to break bolts. Because the torsion section is in rotary fit with the fixed section, the fixed section cannot rotate together with the torsion section under the resistance action between the bullet of the stator and the thrombus taking assembly and the inner wall of the blood vessel and between the fixed section and the blood.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. A vascular thrombi removal device, comprising:
a thrombolysis catheter (1) with a conveying guide wire (2) arranged in the inner cavity, wherein the conveying guide wire (2) extends along the axial direction of the thrombolysis catheter (1);
the bolt breaking assembly (3) is arranged on the conveying guide wire (2), a plurality of bolt breaking edges (4) are arranged on the outer wall of the bolt breaking assembly (3), and the bolt breaking edges (4) extend along the axial direction of the conveying guide wire (2);
the thrombus taking assembly (7) is arranged on the conveying guide wire (2), and the thrombus taking assembly (7) is arranged between the thrombus breaking assembly (3) and the head of the conveying guide wire (2).
2. The vascular thrombi removal device of claim 1, wherein said pin breaking assembly (3) is of a reticulated shell structure, and an outer side wall of said pin breaking assembly (3) is of a spindle type.
3. Vascular thrombi elimination device according to claim 2, wherein said thrombolytic device (3) has a hexagonal star shape in cross section perpendicular to its axial direction.
4. A vascular thrombi removal device according to any of claims 1-3, wherein the outer side wall of said thrombolysis unit (7) in the axial direction is arcuate.
5. A vascular thrombi removal device according to any of claims 1-3, wherein said thrombi removal assembly (7) is rotatably mounted on said delivery guidewire (2).
6. Vascular thrombi elimination device according to claim 5, wherein the head of said delivery guidewire (2) is fixedly mounted with a fixed bullet (5).
7. Vascular thrombi elimination device according to claim 5, wherein the tail of said delivery guidewire (2) is fitted with a guidewire twister (6).
8. A vascular thrombi removal device according to any of claims 1-3, wherein said thrombi removal assembly (7) has at least two layers of nested basket bodies, and a receiving space for receiving thrombi is reserved between adjacent basket bodies.
9. The vascular thrombi removal device of claim 8, wherein said thrombolysis unit (7) has a two-layered nested basket body, the depth of the outer layer of said basket body being no less than twice the depth of the inner layer of said basket body.
10. The vascular thrombi removal device of claim 8, wherein said basket bodies are elastic members and wherein said delivery guidewires (2) between adjacent basket bodies are provided with stop members.
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