Telescopic mesh basket
By using a retractable basket design and controlling the extension and retraction of the basket wires with a spindle, the problem of needing to replace baskets of different sizes in existing technologies is solved. This enables rapid adaptation to the size of foreign objects during surgery, improving capture efficiency and reducing tissue damage.
Patent Information
- Application Number
- CN202422610547.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-10-28
AI Technical Summary
Existing stone retrieval baskets require changing to different sizes depending on the size of the stone or foreign object, which is cumbersome and time-consuming, and makes it difficult to quickly adapt to foreign objects of different sizes during surgery.
Design a retractable basket that controls the extension and retraction of the first and second shaping sections of the basket wire via a spindle, thereby adjusting the diameter of the basket sleeve to accommodate foreign objects of different sizes.
It enables real-time adjustment of the basket size during surgery, improving capture success rate, reducing tissue damage, saving surgical time, reducing costs, and simplifying preparation procedures.
Smart Images
Figure CN223529498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stone retrieval basket technology, and in particular to a retractable basket. Background Technology
[0002] During the procedure to remove stones or foreign objects, different sizes of stone retrieval baskets may be required due to the varying sizes of the stones or foreign objects. Medical staff also need to select the appropriate size stone retrieval basket based on the size of the stone or foreign object, which is quite troublesome. Utility Model Content
[0003] The purpose of this utility model is to provide a retractable basket to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.
[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows: a retractable basket, comprising: an outer tube; a mandrel passing through the outer tube; and a basket sleeve, comprising at least two basket wires, one end of each of the two basket wires being fixed together to form an endpoint, and the other end being fixed to the end of the mandrel to form a convergence point. The basket wires include a first shaping section and a second shaping section connected to form a corner point. One end of the first shaping section is at the endpoint, and one end of the second shaping section is at the convergence point. The curvature of the first shaping section and the second shaping section at the corner point is discontinuous.
[0005] The technical solution has at least the following beneficial effects: when the foreign object being retrieved is small, pushing the mandrel only releases the first shaping section, that is, only the first shaping section extends out of the end of the outer tube, and the two first shaping sections form a basket sleeve with a smaller diameter to achieve the retrieval of smaller foreign objects; when the foreign object being retrieved is large, after releasing the first shaping section, the mandrel can be pushed to release part or all of the second shaping section, thereby adjusting the diameter of the basket sleeve to match the size of foreign objects of different sizes. The adjustable design allows surgeons to precisely adjust the basket opening based on the size and location of the stone or foreign object, thereby improving the success rate of capture. The ability to adjust the basket size during surgery means surgeons can react quickly to situations without changing tools, saving surgical time and increasing efficiency. A smaller initial opening reduces damage to surrounding tissues, especially when operating in narrow or sensitive areas, while the ability to expand to a larger basket size ensures a wider capture range for larger or irregularly shaped stones. Reduced tissue damage and more precise manipulation can decrease patient discomfort and recovery time. Furthermore, the same device can be used for stones of different sizes and types, reducing the need for surgical instruments, lowering costs, and simplifying surgical preparation.
[0006] As a further improvement to the above technical solution, both the first shaping section and the second shaping section are formed into an outwardly convex curved arc shape through a heat-setting process. This ensures that the basket sleeve formed by releasing only the first shaping section and by releasing both the first and second shaping sections has a better outer shape, guaranteeing the effectiveness of the basket sleeve in removing stones / foreign objects.
[0007] As a further improvement to the above technical solution, the curvature of the second shaping section is greater than that of the first shaping section. This allows for a larger internal space in the basket formed after the second shaping section is released, facilitating the removal of stones / foreign objects.
[0008] As a further improvement to the above technical solution, the first shaping section is formed into an outwardly expanding curved arc shape through a heat-setting process, and the second shaping section is formed into an inwardly convex curved arc shape through a heat-setting process. The inwardly convex curved arc shape of the second shaping section allows for a more uniform change in the diameter of the first shaping section during the release of the second shaping section, thereby facilitating the adjustment of the diameter of the basket sleeve.
[0009] As a further improvement to the above technical solution, the outer tube is a transparent tube, which facilitates observation of the release of the wire mesh.
[0010] As a further improvement to the above technical solution, the basket wire and the mandrel are made of nickel-titanium wire and stainless steel, respectively.
[0011] As a further improvement to the above technical solution, the outer wall of the outer tube is coated with a hydrophilic coating, thereby improving the passage performance of the outer tube.
[0012] As a further improvement to the above technical solution, the outer tube is equipped with an operating handle, and the operating handle is slidably fitted with a handle sleeve connected to the mandrel. This facilitates pushing the mandrel and adjusting the release degree of the wire mesh.
[0013] As a further improvement to the above technical solution, the operating handle is equipped with scale lines, which are used to indicate the size of the net basket cover. This makes it easy to know the size of the net basket cover.
[0014] As a further improvement to the above technical solution, a wear-resistant ring is installed on the inner side of the end of the outer tube from which the wire mesh extends. This prevents severe wear at the end of the outer tube from affecting the extension and retraction of the wire mesh. Attached Figure Description
[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;
[0017] Figure 2 This is a schematic diagram of the outer tube extending from the corner point in Embodiment 1 of this utility model;
[0018] Figure 3 This is a schematic diagram of the converging point extending out of the outer tube in Embodiment 1 of this utility model;
[0019] Figure 4 This is a schematic diagram of the outer tube extending from the corner point in Embodiment 2 of this utility model;
[0020] Figure 5 This is a schematic diagram of the collection point extending out of the outer tube in Embodiment 2 of this utility model.
[0021] 100. Outer tube; 110. Wear-resistant ring; 200. Mandrel; 300. Basket sleeve; 310. Basket wire; 311. First shaping section; 312. Second shaping section; 320. Convergence point; 330. Corner point; 340. End point; 400. Operating handle; 410. Handle sleeve; 500. Scale line. Detailed Implementation
[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0026] Example 1:
[0027] Reference Figure 1-3 The retractable basket includes an outer tube 100, a spindle 200, and a basket sleeve 300. The outer tube 100 is a transparent tube made of polypropylene (PP) or polytetrafluoroethylene (PTFE). A hydrophilic coating is formed on the outer wall of the outer tube 100 by a spraying process, making the surface of the outer tube 100 smoother when exposed to liquids. In other embodiments, if the outer tube 100 is made of polytetrafluoroethylene (PTFE), the hydrophilic coating may not be applied.
[0028] The mandrel 200 is made of stainless steel and passes through the outer tube 100. One end of the mandrel 200 is fixedly connected to the basket sleeve 300 via a stainless steel tube sleeve. The basket sleeve 300 includes at least two basket wires 310. In this embodiment, the basket sleeve 300 includes four basket wires 310. One end of each of the four basket wires 310 converges and is fixed together to form an endpoint 340. The other ends of the four basket wires 310 away from the endpoint 340 converge and are all fixed to one end of the mandrel 200. The position where the four basket wires 310 are connected to the mandrel 200 forms a convergence point 320. The four basket wires 310 are evenly distributed circumferentially around the center line of the mandrel 200. The basket wires 310 are made of nickel-titanium wire. In other embodiments, the basket sleeve 300 may also include two, three, five, or six basket wires 310.
[0029] An operating handle 400 is fixedly installed at one end of the outer tube 100. A handle sleeve 410 is slidably fitted on the middle of the operating handle 400. The handle sleeve 410 includes a ring fitted on the operating handle 400 and two finger rings fixed on the outer sides of the ring respectively. A sliding groove is opened in the middle of the operating handle 400. A slider is fixedly installed in the middle of the ring. The slider is slidably set in the sliding groove. By operating the two finger rings, the slider can be driven to slide relative to the operating handle 400.
[0030] The end of the spindle 200 away from the basket sleeve 300 is fixedly connected to the slider, and the end of the spindle 200 near the basket sleeve 300 is inserted into the outer tube 100. Thus, the spindle 200 can be pushed and pulled by operating the handle sleeve 410, thereby realizing the extension and retraction of the basket sleeve 300.
[0031] The basket wire 310 includes a first shaping section 311 and a second shaping section 312. One end of the first shaping section 311 is located at the endpoint 340, and the other end is connected to the second shaping section 312. The connection point of the first shaping section 311 and the second shaping section 312 forms a corner point 330. The end of the second shaping section 312 away from the corner point 330 is located at the convergence point 320. The curvature of the first shaping section 311 at the corner point 330 is discontinuous with the curvature of the second shaping section 312 at the corner point 330.
[0032] When the operating handle sleeve 410 pushes the mandrel 200, the first shaping section 311 of the basket wire 310 is first pushed out / released outside the outer tube 100, that is, when the corner point 330 just extends or is about to extend outside the outer tube 100, the first shaping section 311 of the four basket wires 310 at this time forms a smaller basket sleeve 300 structure, which can realize the retrieval of smaller foreign objects. When the mandrel 200 is pushed further until the convergence point 320 just extends or is about to extend outside the outer tube 100, the four sets of basket wires 310 can form a larger basket sleeve 300 structure, which can realize the retrieval of larger foreign objects.
[0033] Therefore, the embodiments of this application have the following advantages:
[0034] (1) Enhanced adaptability: The adjustable design allows doctors to precisely adjust the opening of the basket according to the size and location of the stone or foreign object, thereby improving the success rate of capture.
[0035] (2) Operational flexibility: The size of the basket can be adjusted in real time during the operation, which means that the doctor can make a quick response according to the actual situation without changing tools, saving operation time and improving efficiency.
[0036] (3) Reduced tissue damage: A smaller initial opening can reduce damage to surrounding tissues, especially when operating in narrow or sensitive areas. The first shaping section 311 can form a basket sleeve 300 with a diameter of about 10 mm, which can expand to a diameter of about 25 mm after the release of the second shaping section 312, thus ensuring a sufficiently large capture range to handle larger or irregularly shaped stones. It should be noted that the diameter of the basket sleeve 300 can be adjusted to different needs.
[0037] (4) Improved patient comfort: Reduced tissue damage and more precise operation can reduce patient discomfort and recovery time.
[0038] (5) Multifunctionality: The same device can be used for stones of different sizes and types, reducing the need for surgical instruments, lowering costs and simplifying the surgical preparation process.
[0039] Both the first shaping section 311 and the second shaping section 312 are heat-set to form an outwardly convex curved arc shape. In their natural state, both sections 311 and 312 bulge away from the center line of the mandrel 200, allowing the four basket wires 310 to form a basket sleeve 300 structure. During heat setting, the second shaping section 312 is more curved than the first shaping section 311. After the second shaping section 312 is released, it expands outward, resulting in a wider internal space within the basket sleeve, facilitating the removal of stones / foreign objects.
[0040] A wear-resistant ring 110 is fixedly installed on the inner side of the end of the outer tube 100 away from the operating handle 400 to improve the wear resistance of the outer tube 100 and reduce the wear on the port of the outer tube 100 caused by repeated adjustments of the size of the basket sleeve 300.
[0041] A scale line 500 is provided on the operating handle 400 near the edge of the slide groove. The scale value on the scale line 500 marks the diameter of the basket sleeve 300 formed when the slider slides to that position. This makes it easier to judge the real-time size of the basket sleeve 300 and improves the accuracy of the size adjustment of the basket sleeve 300.
[0042] Example 2:
[0043] Reference Figure 4-5 The difference between this embodiment and Embodiment 1 lies in the structure of the basket wire 310. In this embodiment, the first shaping section 311 is formed into an outwardly convex curved arc shape through a heat-setting process, while the second shaping section 312 is formed into an inwardly convex curved arc shape through a heat-setting process, that is, the second shaping section 312 convexes towards the center line of the mandrel 200. During the release of the second shaping section 312, since the outward expansion distance of the second shaping section 312 after extending out of the outer tube 100 is relatively uniform, the diameter of the first shaping section 311 can change more uniformly, thereby facilitating the adjustment of the diameter of the basket sleeve and making it easier to fit a suitable size basket sleeve 300, thus improving operational efficiency.
[0044] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A retractable wire basket, characterized in that, include: outer tube; The mandrel is inserted through the outer tube; A basket sleeve includes at least two basket wires, one end of each basket wire is fixed to form an endpoint, and the other end is fixed to the end of the mandrel to form a convergence point. The basket wires include a first shaping section and a second shaping section connected to form a corner point. One end of the first shaping section is at the endpoint, and one end of the second shaping section is at the convergence point. The curvature of the first shaping section and the second shaping section at the corner point is discontinuous.
2. The retractable wire basket according to claim 1, characterized in that: Both the first shaping section and the second shaping section are formed into an outwardly convex curved arc shape through a heat-setting process.
3. The retractable wire basket according to claim 2, characterized in that: The degree of curvature of the second shaping section is greater than that of the first shaping section.
4. The retractable wire basket according to claim 1, characterized in that: The first shaping section is formed into an outwardly expanding curved arc shape through a heat-setting process, and the second shaping section is formed into an inwardly convex curved arc shape through a heat-setting process.
5. The retractable wire basket according to claim 1, characterized in that: The outer tube is a transparent tube.
6. The retractable wire basket according to claim 1, characterized in that: The basket wire and the mandrel are made of nickel-titanium wire and stainless steel, respectively.
7. The retractable wire basket according to claim 1, characterized in that: The outer wall of the outer tube is coated with a hydrophilic coating.
8. The retractable wire basket according to claim 1, characterized in that: The outer tube is equipped with an operating handle, and the operating handle is slidably fitted with a handle sleeve that is connected to the spindle.
9. A retractable wire basket according to claim 8, characterized in that: The operating handle is equipped with scale lines, which are used to indicate the size of the basket cover.
10. A retractable wire basket according to claim 1, characterized in that: A wear-resistant ring is installed on the inner side of the end of the outer tube from which the basket wire extends.