Variable-diameter thrombus stripping device
The variable-diameter thrombectomy device, which uses push wires and traction wires in conjunction with a peeler woven from nickel-titanium alloy wires, solves the problem of poor versatility of existing vascular occlusion treatment devices, achieving efficient removal of thrombi and preventing the expulsion of debris, thus improving treatment outcomes.
Patent Information
- Application Number
- CN202422790764.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-15
AI Technical Summary
Existing vascular occlusion treatment devices cannot adapt to different blood vessel sizes, leading to increased treatment costs and time costs, and conventional thrombectomy stent designs have poor versatility.
A variable diameter thrombectomy device is designed, comprising a compressible and releasable dissector and a traction wire. The radial dimension of the dissector can be adjusted by the cooperation of pushing the wire and extending the guide wire. Combined with the dissector formed by braiding nickel-titanium alloy wire, it can change shape in blood vessels to adapt to different vessel sizes.
It achieves efficient removal and dissection of thrombi, avoids the expulsion of embolic debris, and improves the effectiveness and efficiency of treatment.
Smart Images
Figure CN223554923U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field, especially a variable diameter thrombus stripping device. BACKGROUND
[0002] The blood vessel appears narrow phenomenon due to embolus and other impurities deposition in the blood vessel, and even causes the blood vessel complete blockage or occlusion when especially serious, leads to the tissue and organ of the body to lose function and necrosis due to ischemia. Common symptoms are dyspnea and chest pain, the incidence is higher, can seriously endanger the life safety of patients.
[0003] Clinically, the commonly used treatment method of blood vessel blockage has: drug thrombolysis, intraluminal thrombus taking stent operation etc. Among them, the drug thrombolysis treatment cycle is long, and the cost is high, the thrombus taking stent thrombus taking mode, because the conventional thrombus taking stent all belongs to fixed type design, that is, the self-expanding size is fixed, cannot adapt to the design of different blood vessel sizes, the commonality is poor, and the medical staff needs to carry out relevant exploration to the blood vessel size of the patient before operation, whether it is time cost or treatment cost is improved.
[0004] Therefore, a variable diameter thrombus stripping device needs to be developed to overcome the above technical problems. UTILITY MODEL CONTENTS
[0005] The utility model solves the technical problem that a variable diameter thrombus stripping device is provided to effectively overcome the defects of the prior art.
[0006] The technical solution of the utility model to solve the above technical problem is as follows:
[0007] A variable diameter thrombus stripping device, comprising a hollow tubular push wire, a compressible and release stripper and a traction wire, one end of the push wire is provided with an extension guide wire, one end of the stripper is connected with one end of the push wire, the extension guide wire passes through the other end of the stripper from the inside, the traction wire is built in the push wire, one end of the traction wire is connected with the other end of the stripper, the stripper can be stretched into a strip along the extension guide wire under external restraint, or released into a gourd shape, the traction wire is used for pulling the other end of the stripper close to one end, so that the radial size of the stripper is increased, and the other end of the stripper is covered with a membrane capable of permeating blood.
[0008] On the basis of the above technical solution, the utility model can also be improved as follows.
[0009] Further, the stripper comprises a plurality of nickel-titanium alloy wires, the plurality of nickel-titanium alloy wires are woven into a cage shape, one end of the plurality of nickel-titanium alloy wires is gathered and riveted to each other to form a first riveted joint, the first riveted joint is connected and fixed with one end of the pushing wire, the other end of the plurality of nickel-titanium alloy wires is gathered and riveted to each other to form a second riveted joint, the extension guide wire passes through the second riveted joint, and one end of the traction wire is connected with the second riveted joint.
[0010] Further, the stripper is woven into a gourd-shaped ball cage.
[0011] Further, a wire inlet hole communicating with the inner cavity of the pushing wire is arranged at the connection position between the extension guide wire and one end of the pushing wire, and one end of the traction wire passes out of the wire inlet hole.
[0012] Further, the other end of the pushing wire is connected with a handle.
[0013] Further, the handle is tubular.
[0014] Further, a driving member is arranged on the handle, the other end of the traction wire is connected with the driving member, and the driving member is used for pulling the traction wire.
[0015] Further, the driving member is a knob in rotational connection with the handle, the other end of the traction wire passes through a hole in the handle and is connected with the driving member, and the driving member pulls the traction wire when rotating.
[0016] Further, a sliding groove is formed in the side wall of the handle, a sliding piece is slidingly encapsulated in the sliding groove, the other end of the traction wire is connected with the sliding piece in the handle, and the sliding piece pulls the traction wire when sliding.
[0017] Further, an anti-slip structure is arranged on the surface of the handle.
[0018] The utility model discloses the beneficial effect is: simple, reasonable, can effectively realize the stripping of thrombus, and the wrapping is strong, avoids the thrombus fragment collected to be squeezed off, and the cleaning effect is better. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the structure schematic diagram of the variable diameter thrombus stripping device of the utility model;
[0020] Figure 2 It is the structure schematic diagram of another embodiment of the variable diameter thrombus stripping device of the utility model;
[0021] Figure 3 It is the structure schematic diagram of another embodiment of the variable diameter thrombus stripping device of the utility model.
[0022] The attached diagram lists the components represented by each number as follows:
[0023] 1. Push wire; 2. Peeler; 3. Traction wire; 4. Handle; 5. Drive unit; 6. Membrane; 11. Extension guide wire; 21. First rivet joint; 22. Second rivet joint. Detailed Implementation
[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0025] Example
[0026] like Figure 1 As shown, the variable diameter thrombectomy device of this embodiment includes a hollow tubular push wire 1, a compressible and releaseable stripper 2, and a traction wire 3. One end of the push wire 1 is provided with an extension guide wire 11. One end of the stripper 2 is connected to one end of the push wire 1. The extension guide wire 11 passes through the other end of the stripper 2 from the inside. The traction wire 3 is built into the push wire 1, and one end of it is connected to the other end of the stripper 2. The stripper 2 can be stretched into a strip shape along the extension guide wire 11 under external restraint, or released into a gourd shape (or a cross-sectional profile shape of "8"). The traction wire 3 is used to pull the other end of the stripper 2 close to one end, thereby increasing the radial dimension of the stripper 2. The other end of the stripper 2 is covered with a membrane 6 that is permeable to blood.
[0027] The variable diameter thrombectomy device of this embodiment can, after release, pull the other end of the stripper 2 closer to one end by operating the traction wire 3, thereby changing the maximum cross-sectional area of the stripper 2. In other words, the stripper 2 is "compressed" and adjusted along the long axis of the push wire 1, causing its volume to expand. The specific usage process is as follows:
[0028] The whole variable diameter thrombus stripping device is delivered into the blood vessel together with the catheter with negative pressure suction to the target position near the thrombus, the device is built-in in the catheter, then the stripper 2 is made to pass through the thrombus by operating the push wire 1 to reach the distal end of the thrombus, after release, the whole stripper 2 is in the shape of a gourd or an 8, then the pulling wire 3 is operated to pull outwards, so that the other end of the stripper 2 is close to the one end, so that the “long axis” compresses the stripper 2, so that the stripper 2 expands, the cross-sectional area increases (increases to the position close to the blood vessel wall, then keeps the pulling state of the pulling wire 3 to the stripper 2), the whole push wire 1 is operated to pull to the catheter port, so that the thrombus is close to the catheter end, and under the action of negative pressure, the thrombus enters through the catheter, in the process of continuously pulling back the push wire 1, the thrombus is completely sucked out. The whole device has simple and reasonable structure, can effectively realize the stripping of the thrombus, has strong wrapping property, avoids that the collected embolus fragments are squeezed out, and has better cleaning effect.
[0029] It should be noted that: the variable diameter design of the stripper 2 can make the maximum edge contour of the outer periphery of the stripper 2 as close to the blood vessel wall as possible after the border, effectively intercepts the thrombus fragments during the operation, and makes the thrombus removal more complete.
[0030] In the embodiment, the stripper 2 includes a plurality of nickel-titanium alloy wires, the plurality of nickel-titanium alloy wires are woven into a cage shape, one end of the plurality of nickel-titanium alloy wires is gathered and riveted to form a first riveted joint 21, the first riveted joint 21 is connected and fixed with one end of the push wire 1, the other end of the plurality of nickel-titanium alloy wires is gathered and riveted to form a second riveted joint 22, the extension guide wire 11 passes through the second riveted joint 22, and one end of the pulling wire 3 is connected with the second riveted joint 22.
[0031] In the embodiment, the stripper 2 is woven into a gourd-shaped ball cage. The mesh size can be relatively sparse, and in the pulling process, the wire can cut and crush the thrombus to a certain extent, which is more conducive to the removal of the thrombus.
[0032] In the embodiment, the shape of the stripper 2 can also be designed as a dumbbell shape, a gourd string shape and the like.
[0033] In the embodiment, a wire inlet hole communicating with the inner cavity of the push wire 1 is arranged at the connection position of the extension guide wire 11 and one end of the push wire 1, and one end of the pulling wire 3 passes out of the wire inlet hole. The design facilitates the arrangement and direction of the pulling wire 3, and the end of the pulling wire 3 exposed outside the wire inlet hole is connected with the other end of the stripper 2 from the inside of the stripper 2.
[0034] In the embodiment, the other end of the push wire 1 is connected with a handle 4. The handle 4 is convenient for operation to achieve the purpose of pulling the push wire 1.
[0035] In this embodiment, the handle 4 is designed in a tubular shape for easy operation.
[0036] In a preferred embodiment, the handle 4 is provided with a drive member 5, and the other end of the traction wire 3 is connected to the drive member 5. The drive member 5 is used to pull the traction wire 3.
[0037] In the above implementation scheme, the effective pulling operation of the traction wire 3 is achieved through the driving component 5, which is very convenient.
[0038] In this embodiment, the design of the driving component 5 includes at least the following two methods:
[0039] 1) such as Figure 2 As shown, the driving component 5 is a knob that is rotatably connected to the handle 4. The other end of the traction wire 3 passes through the hole on the handle 4 and is connected to the driving component 5. When the driving component 5 rotates, it pulls the traction wire 3.
[0040] In the above scheme 2), the knob is connected to a short shaft, which is rotatably connected to the surface of the handle 4. The end of the traction wire 3 passes through the hole on the handle 4 and is connected and fixed to the short shaft. As the knob drives the short shaft to rotate, the end of the traction wire 3 is wound on the short shaft, thereby forming a pulling and moving purpose on the other end of the peeler 2, so that the peeler 2 can effectively compress and expand axially.
[0041] 2) such as Figure 3 As shown, a sliding groove is opened on the side wall of the handle 4, and a sliding plate is slidably enclosed in the sliding groove. The other end of the traction wire 3 is connected to the sliding plate in the handle 4. When the sliding plate slides, it pulls the traction wire 3.
[0042] In the above scheme 2), a strip-shaped groove is provided on the side wall of the handle 4 along its length direction. The slide plate is slidably mounted in the groove and can move along the groove. The inner side of the slide plate is connected to the other end of the traction wire 3. When the slide plate moves along the long axis of the handle 4, the traction wire 3 can be pulled, thereby driving the other end of the peeler 2 to move closer to one end, realizing the axial compression expansion of the peeler 2.
[0043] In this embodiment, an anti-slip structure is provided on the surface of the handle 4. This provides greater stability for medical personnel when holding the handle. The anti-slip structure can be a rubber sleeve, anti-slip particles, etc.
[0044] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0045] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0046] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0047] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0048] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.
[0049] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.
Claims
1. A variable gauge thrombus dislodging device, comprising: The application relates to a hollow tubular push wire (1), a compressible and releasable stripper (2) and a traction wire (3), one end of the push wire (1) is provided with an extension guide wire (11), one end of the stripper (2) is connected with one end of the push wire (1), the extension guide wire (11) passes through the other end of the stripper (2) from the inside, the traction wire (3) is arranged in the push wire (1), one end of the traction wire (3) is connected with the other end of the stripper (2), the stripper (2) can be elongated into a strip along the extension guide wire (11) under external constraint or released into a gourd shape, the traction wire (3) is used for pulling the other end of the stripper (2) close to one end, so that the radial size of the stripper (2) is increased, and the outer surface of the other end of the stripper (2) is covered with a membrane (6) capable of permeating blood.
2. The variable gauge thrombus dislodger of claim 1, wherein: The stripper (2) comprises a plurality of nickel-titanium alloy wires, the plurality of nickel-titanium alloy wires are woven into a cage shape, one end of the plurality of nickel-titanium alloy wires is gathered and riveted to form a first riveted joint (21), the first riveted joint (21) is connected and fixed with one end of the push wire (1), the other end of the plurality of nickel-titanium alloy wires is gathered and riveted to form a second riveted joint (22), the extension guide wire (11) passes through the second riveted joint (22), and one end of the traction wire (3) is connected with the second riveted joint (22).
3. The variable gauge thrombus dislodger of claim 2, wherein: The stripper (2) is woven into a gourd-shaped ball cage.
4. The variable gauge thrombus dislodger of claim 1, wherein: The connection position of the extension guide wire (11) and one end of the push wire (1) is provided with a wire inlet hole communicating with the inner cavity of the push wire (1), and one end of the traction wire (3) passes out of the wire inlet hole.
5. The variable gauge thrombus dislodger of any one of claims 1 to 4, wherein: The other end of the push wire (1) is connected with a handle (4).
6. The variable gauge thrombus dislodger of claim 5, wherein: The handle (4) is tubular.
7. The variable gauge thrombus dislodger of claim 6, wherein: A driving member (5) is arranged on the handle (4), the other end of the traction wire (3) is connected with the driving member (5), and the driving member (5) is used for pulling the traction wire (3).
8. The variable gauge thrombus dislodger of claim 7, wherein: The driving member (5) is a rotary knob which is rotationally connected with the handle (4), the other end of the traction wire (3) passes through a hole in the handle (4) and is connected with the driving member (5), and the driving member (5) pulls the traction wire (3) when rotating.
9. The variable gauge thrombus dislodger of claim 7, wherein: A sliding groove is formed in the side wall of the handle (4), a sliding piece is slidingly packaged in the sliding groove, the other end of the traction wire (3) is connected with the sliding piece in the handle (4), and the sliding piece pulls the traction wire (3) when sliding.
10. The variable gauge thrombus dislodger of claim 5, wherein: The surface of the handle (4) is provided with an anti-skid structure.