Vena cava thrombus removing device

Abstract

The invention provides a vena cava thrombus removing device, and relates to the field of medical treatment. The vena cava thrombus removing device comprises a handle, an operating rod, a grabbing assembly, an opening assembly, a filtering assembly and a controller. One end of the operating rod is connected with the handle, and an operating channel is arranged in the middle of the operating rod. The grabbing assembly is hinged to the end, away from the handle, of the operating rod. The opening assembly is installed in the operation channel, and one end of the opening assembly extends out of the operation channel and is hinged to the grabbing assembly. The size of the opening assembly is larger than that of the operating rod after the opening assembly is opened, and the size of the opening assembly is smaller than that of the operating rod after the opening assembly is closed. The filtering assembly is installed on the grabbing assembly. The controller is electrically connected with the opening assembly. The thrombus in the vena cava is grabbed through the grabbing assembly, and the opening of the grabbing assembly is opposite to the blood flow direction in the grabbing process, so that the thrombus conveniently enters the filtering assembly.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and particularly to a device for removing vena cava thrombus. Background Art

[0002] The treatment methods for inferior vena cava thrombus mainly include: (1) drug anticoagulation therapy (unfractionated heparin, low molecular weight heparin, vitamin K antagonist, direct factor Xa inhibitor, direct factor IIa inhibitor); (2) thrombolytic therapy (peripheral vein thrombolysis and transcatheter thrombolysis); (3) mechanical thrombus removal; (4) interventional angioplasty. In order to prevent pulmonary embolism, it is necessary to routinely implant a filter in the vena cava. And some tumor patients spontaneously develop inferior vena cava thrombus, thrombus formation after vena cava filter implantation, or thrombus formation after central vein implantation. At present, there is no good method for the removal treatment of thrombus in the vena cava. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a device for removing vena cava thrombus, which grabs the thrombus in the vena cava through a grabbing component. During the grabbing process, the opening of the grabbing component is opposite to the direction of blood flow, facilitating the thrombus to enter the filtering component.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A device for removing vena cava thrombus, comprising:

[0006] A handle;

[0007] An operating rod, one end of which is connected to the handle, and an operating channel is provided in the middle of the operating rod;

[0008] A grabbing component, hinged to the end of the operating rod far from the handle;

[0009] An opening component, installed in the operating channel, one end of the opening component extends out of the operating channel and is hinged to the grabbing component. When the opening component is opened, its size is larger than that of the operating rod, and when the opening component is closed, its size is smaller than that of the operating rod;

[0010] A filtering component, installed on the grabbing component;

[0011] A controller, electrically connected to the opening component;

[0012] Wherein, the opening component includes:

[0013] A connecting rod, one end of which is hinged to the grabbing component;

[0014] An installation rod, installed in the operating channel, and the other end of the connecting rod is hinged to one end of the installation rod;

[0015] A driving member is installed inside the handle. The movable shaft of the driving member is connected to the other end of the mounting rod, and the controller is electrically connected to the driving member.

[0016] Optionally, an installation groove is provided at one end of the operating rod away from the handle, and the grasping assembly is hinged in the installation groove.

[0017] Optionally, the grasping assembly includes:

[0018] A plurality of opening rods are evenly distributed along the circumferential direction of the operating rod. One end of each opening rod is hinged to the operating rod, and an installation bayonet for installing the filtering assembly is provided at the other end of the opening rod.

[0019] A cutting knife is installed at the end of the other end of one of the opening rods.

[0020] Wherein, when the cutting knife is installed at the other end of the opening rod, the installation bayonet is completely covered.

[0021] Optionally, the filtering assembly includes:

[0022] A plurality of metal wires are woven into a net-shaped filter bag.

[0023] A mounting member is installed on the filter bag, and the mounting member is installed on the opening assembly.

[0024] Optionally, the filter holes of the filter bag are diamond-shaped.

[0025] Optionally, the cutting knife includes:

[0026] A blade body is provided with a slot matching the opening rod. The orthographic projection of the blade body is an isosceles triangle, and each corner of the blade body is an arc structure.

[0027] A blade edge is provided on the blade body, and an arc structure is formed when the blade edge is connected to the blade body.

[0028] Optionally, the blade body and the blade edge are of an integrally formed structure.

[0029] Optionally, the vena cava thrombus removal device further includes:

[0030] A sleeve rod, one end of the sleeve rod is connected to the handle, and the operating rod is rotatably installed inside the sleeve rod.

[0031] Optionally, one end of the sleeve rod away from the handle radially converges and fits against the outer side wall of the operating rod.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. The thrombus in the vena cava is grasped by the grasping component. During the grasping process, the opening of the grasping component is opposite to the direction of blood flow, facilitating the thrombus to enter the filtering component.

[0034] 2. A filter net woven with metal wires is used to grasp the thrombus, enabling blood flow to smoothly enter the heart through the filter net when grasping the thrombus. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a schematic diagram of the overall structure of the vena cava thrombus removal device.

[0037] Figure 2 It is a schematic diagram of the grasping component in the open state.

[0038] Figure 3 It is a schematic diagram of the grasping component in the retracted state.

[0039] Figure 4 It is a schematic diagram of the cutting knife.

[0040] Figure 5 It is a schematic diagram of the vena cava thrombus removal device with a sleeve rod.

[0041] Figure 6 It is a partial schematic diagram of the cooperation between the removal device and the sleeve rod.

[0042] Reference Numerals:

[0043] 1. Handle;

[0044] 2. Operating rod; 21. Operating channel; 22. Installation groove;

[0045] 3. Grasping component; 31. Opening rod; 32. Installation bayonet; 33. Cutting knife; 331. Knife body; 332. Card slot; 333. Blade;

[0046] 4. Opening component; 41. Connecting rod; 42. Installation rod; 43. Driving part;

[0047] 5. Filtering component; 51. Metal wire; 52. Installation part;

[0048] 6. Controller;

[0049] 7. Sleeve rod. Detailed implementation mode

[0050] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present invention is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0052] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0053] In the present invention, unless otherwise clearly specified and defined, the terms "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0055] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0056] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0057] As Figure 1 shown, an inferior vena cava thrombus removal device is provided in an embodiment of the present invention, including: a handle 1, an operating rod 2, a grasping assembly 3, an opening assembly 4, a filtering assembly 5 and a controller 6. One end of the operating rod 2 is connected to the handle 1, and an operating channel 21 is provided in the middle of the operating rod 2. The grasping assembly 3 is hinged to the end of the operating rod 2 away from the handle 1. The opening assembly 4 is installed in the operating channel 21, and one end of the opening assembly 4 extends out of the operating channel 21 and is hinged to the grasping assembly 3. When the opening assembly 4 is in the open state, its size is larger than that of the operating rod 2, and when the opening assembly 4 is in the closed state, its size is smaller than that of the operating rod 2. The filtering assembly 5 is installed on the grasping assembly 3. The controller 6 is electrically connected to the opening assembly 4.

[0058] During use, one end of the operating rod 2 is introduced into the patient's body and extended into the patient's inferior vena cava. When removing the thrombus, after the operating rod 2 reaches the in-place position, the controller 6 controls the opening assembly 4 to move within the operating rod 2, so that the grasping assembly 3 hinged to the opening assembly 4 is driven to open, and then the thrombus in the inferior vena cava is loaded into the filtering assembly 5 through the grasping assembly 3. Then, the controller 6 controls the opening assembly 4 to drive the grasping assembly 3 to close. After the grasping assembly 3 is closed, the operator takes out the operating rod 2, and then cleans the thrombus in the filtering assembly 5. During the operation, the operation can be repeated.

[0059] To facilitate the entry of the cleaning device into the vena cava, the size of the grasping assembly 3 needs to be smaller than that of the operating rod 2 after it is closed. To facilitate loading the thrombus into the filtering assembly 5, the controller 6 controls the movement of the opening assembly 4 to open the grasping assembly 3. The grasping assembly 3 fits against the inner diameter of the vena cava. After fitting, the operating rod 2 is moved so that the thrombus flows into the filtering assembly 5 under the action of blood flow.

[0060] More specifically, as Figure 1 、 Figure 2 and Figure 3 shown, the opening assembly 4 includes: a connecting rod 41, a mounting rod 42 and a driving member 43. One end of the connecting rod 41 is hinged to the grasping assembly 3. The mounting rod 42 is installed in the operating channel 21. The other end of the connecting rod 41 is hinged to one end of the mounting rod 42. The driving member 43 is installed in the handle 1. The movable shaft of the driving member 43 is connected to the other end of the mounting rod 42. The controller 6 is electrically connected to the driving member 43.

[0061] During use, the controller 6 controls the driving member 43 to drive the mounting rod 42 to move in the operating channel 21. The mounting rod 42 drives the connecting rod 41 to rotate around its hinge points with the mounting rod 42 and the grasping assembly 3 during the movement, and drives the grasping assembly 3 to open or close during the rotation.

[0062] Using the controller 6 to control the movement of the driving member 43 makes the control of the opening angle of the grasping assembly 3 more accurate. It avoids the grasping assembly 3 scratching the inner wall of the blood vessel due to excessive opening, or avoids the insufficient opening angle of the grasping assembly 3, resulting in the thrombus running out of the filtering assembly 5 during the thrombus removal process.

[0063] In one embodiment, as Figure 1 shown, to facilitate the installation of the grasping assembly 3, an installation groove 22 is provided at the end of the operating rod 2 away from the handle 1, and the grasping assembly 3 is hinged in the installation groove 22.

[0064] To avoid the grasping assembly 3 scratching the inner wall of the vena cava during the process of entering the vena cava, an installation groove 22 is provided at the end of the operating rod 2 away from the handle 1, so that the grasping assembly 3 can be completely accommodated in the installation groove 22 after installation.

[0065] In one embodiment, as Figure 1 、 Figure 2 and Figure 3As shown, the grasping component 3 includes: a plurality of opening rods 31 and a cutting knife 33. The plurality of opening rods 31 are evenly distributed along the circumferential direction of the operating rod 2, and one end of the opening rod 31 is hinged to the operating rod 2. The other end of the opening rod 31 is provided with a mounting bayonet 32 for mounting the filtering component 5. The cutting knife 33 is mounted at the end of the other end of the opening rod 31. Among them, when the cutting knife 33 is mounted at the other end of the opening rod 31, the mounting bayonet 32 is completely covered.

[0066] During use, the opening component 4 drives the plurality of opening rods 31 to open outward from the end away from the operating rod 2, so that the cutting knife 33 mounted on the opening rod 31 is close to the blood vessel wall. Then, the operating rod 2 is driven to move in the vena cava, so that the cutting knife 33 mounted on the operating rod 2 clears the thrombus attached to the blood vessel wall.

[0067] In one embodiment, as Figure 1 shown, the filtering component 5 includes: a plurality of metal wires 51 and a mounting member 52. The plurality of metal wires 51 are woven into a net-like filter bag. The mounting member 52 is mounted on the filter bag, and the mounting member 52 is mounted on the opening component 4.

[0068] During use, the mounting member 52 is mounted in the mounting bayonet 32 of the opening rod 31, and then the cutting knife 33 is mounted on the opening rod 31. At this time, the cutting knife 33 completely covers the mounting bayonet 32 to limit the mounting member 52 and prevent the mounting member 52 from falling off during the operation.

[0069] In one embodiment, the filter holes of the filter bag are diamond-shaped. The filter holes are set in a diamond structure to facilitate the flow of blood.

[0070] In one embodiment, as Figure 4 shown, the cutting knife 33 includes: a knife body 331 and a blade 333. The knife body 331 is provided with a slot 332 matching the opening rod 31. The front projection of the knife body 331 is an isosceles triangle, and each corner of the knife body 331 is an arc structure. The blade 333 is arranged on the knife body, and when the blade 333 is connected to the knife body 331, it forms an arc structure.

[0071] To facilitate the installation of the knife body 331, a slot 332 is provided on one side of the knife body 331, and it is connected to the opening rod 31 through the slot 332. When the knife body 331 is installed, the mounting member 52 on the filter bag is fixed on the opening rod 31 to prevent the filter bag from falling off during movement.

[0072] Each corner of the knife body 331 is set to be arc-shaped to further improve the use safety and prevent the sharp corners from damaging the blood vessel wall during use. The blade 333 forms an arc structure after being mounted on the knife body 331 to also prevent the cutting knife 33 from damaging the blood vessel wall.

[0073] In one embodiment, in order to make the structure of the resection knife 33 simpler, the knife body 331 and the blade 333 are an integrally formed structure.

[0074] In one embodiment, if Figure 5 As shown, the vena cava thrombus removal device further comprises: a sleeve rod 7. One end of the sleeve rod 7 is connected to the handle 1, and the operating rod 2 is rotatably installed in the sleeve rod 7. In order to facilitate the rotation of the operating rod 2 during the thrombus removal process, the operating rod 2 is arranged in the sleeve rod 7.

[0075] In one embodiment, if Figure 6 As shown, in order to make the sleeve rod 7 fit better with the operating rod 2 , the end of the sleeve rod 7 away from the handle 1 is radially retracted and fits with the outer side wall of the operating rod 2 .

[0076] The specific process of thrombectomy using the vena cava thrombus removal device is as follows:

[0077] If a huge thrombus occurs in the superior vena cava, the inferior vena cava is usually percutaneously punctured into a vascular sheath in the unilateral femoral vein to establish a channel, and the vena cava thrombus removal device is inserted into the inferior vena cava through the channel. Under the fluoroscopy of DSA and the guidance of the super-slip guide wire, the vena cava thrombus removal device is pushed into the lower end of the superior vena cava thrombus (enhanced CT determines the specific location of the thrombus). Open the filter component 5 of the vena cava thrombus removal device, push the operating rod 2 along the superior vena cava, and after the thrombus is captured, the installation rod 42 slides inside the operating rod 2, so that the filter bag is closed under the drive of the installation rod 42, and the vena cava thrombus removal device is taken out through the channel, and the thrombus in the vena cava thrombus removal device is removed in vitro.

[0078] If a huge thrombus occurs in the inferior vena cava, the superior vena cava is usually percutaneously punctured into the right internal jugular vein to insert a vascular sheath to establish a channel, and the vena cava thrombus removal device is inserted into the superior vena cava through the channel. Under the fluoroscopy of DSA and the guidance of the super-slip guide wire, the vena cava thrombus removal device is pushed into the upper end of the thrombus in the inferior vena cava (enhanced CT determines the specific location of the thrombus). Open the filter component 5 of the vena cava thrombus removal device, push the operating rod 2 along the inferior vena cava, and after the thrombus is captured, the installation rod 42 slides inside the operating rod 2, so that the filter bag is closed under the drive of the installation rod 42, and the vena cava thrombus removal device is taken out through the channel, and the thrombus in the vena cava thrombus removal device is removed in vitro.

[0079] The above process can be repeated until the thrombus is completely removed.

[0080] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vena cava thrombus removal device, characterized in that, Comprising: A handle; An operating rod, one end of which is connected to the handle, and an operating channel is provided in the middle of the operating rod; A grasping component, hinged to the end of the operating rod away from the handle; An opening component, installed in the operating channel, one end of the opening component extends out of the operating channel and is hinged to the grasping component. When the opening component is opened, its size is larger than the size of the operating rod, and when the opening component is closed, its size is smaller than the size of the operating rod; A filtering component, installed on the grasping component; A controller, electrically connected to the opening component; Wherein, the opening component includes: A connecting rod, one end of which is hinged to the grasping component; An installation rod, installed in the operating channel, and the other end of the connecting rod is hinged to one end of the installation rod; A driving member, installed in the handle, the movable shaft of the driving member is connected to the other end of the installation rod, and the controller is electrically connected to the driving member.

2. The vena cava thrombus removal device according to claim 1, wherein, An installation groove is provided at the end of the operating rod away from the handle, and the grasping component is hinged in the installation groove.

3. The vena cava thrombus removal device according to claim 1, wherein The grasping component includes: Multiple opening rods, the multiple opening rods are evenly distributed along the circumferential direction of the operating rod, one end of the opening rod is hinged to the operating rod, and the other end of the opening rod is provided with an installation bayonet for installing the filtering component; An excision knife, installed at the end of the other end of one of the opening rods; Wherein, when the excision knife is installed at the other end of the opening rod, the installation bayonet is completely covered.

4. The vena cava thrombus removal device according to claim 3, wherein, The filtering component includes: Multiple metal wires, the multiple metal wires are woven into a net-shaped filter bag; An installation member, installed on the filter bag, and the installation member is installed on the opening component.

5. The vena cava thrombus removal device according to claim 4, characterized in that, The filter holes of the filter bag are diamond-shaped.

6. The vena cava thrombus removal device according to claim 3, wherein, The excision knife includes: A knife body, a card slot matching the opening rod is provided on the knife body, the front projection of the knife body is an isosceles triangle, and each corner of the knife body is an arc structure; A blade, arranged on the knife body, and when the blade is connected to the knife body, it forms an arc structure.

7. The vena cava thrombus removal device according to claim 6, characterized in that, The knife body and the blade are of an integrally formed structure.

8. The vena cava thrombus removal device according to claim 1, wherein The vena cava thrombus removal device further includes: A sleeve rod, one end of the sleeve rod is connected to the handle, and the operating rod is rotatably installed in the sleeve rod.

9. The vena cava thrombus removal device according to claim 8, wherein, The end of the sleeve rod away from the handle radially converges and fits against the outer side wall of the operating rod.

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