Calculus removing mesh basket assembly

Abstract

The utility model relates to the field of medical instruments, in particular to a calculus removing mesh basket assembly which comprises a mesh basket wire, a head end tube and an outer sheath tube, and the mesh basket wire is of an integral structure which is made of a nickel-titanium tube and provided with a tube portion and a wire portion. The head end of the mesh basket wire serves as the fixed end, the other end of the mesh basket wire serves as the stretching end, during assembly, the head end is larger in size, the three nickel-titanium wires and the head end are of an integrated structure, the head end can be directly fixed for use, the other end of the mesh basket wire penetrates through a pipe cavity of the head end of the mesh basket wire to be better combined with other assemblies for use, the assembly efficiency is high, and the cost is low. When the mesh basket wire is produced, laser cutting is carried out on the nickel-titanium plate, so that the yield of produced nickel-titanium wires is high, one group of processing is quicker and more convenient, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a stone removal basket component. Background Art

[0002] Urinary stones are a common disease in urology. Worldwide surveys and studies have found an incidence of approximately 2% to 20%, and the incidence increases with age. Urinary stones can occur in the kidneys, ureters, bladder, and urethra and are divided into upper and lower urinary tract stones, with kidney and ureteral stones being more common. Typical manifestations of kidney and ureteral stones are renal colic and hematuria, while bladder stones primarily present with dysuria and painful urination. Currently, percutaneous nephrolithotomy, flexible ureteroscopic retrograde lithotripsy, and extracorporeal shock wave lithotripsy are relatively mature and have become the mainstays of urinary stone treatment.

[0003] Disposable stone removal baskets are widely used in stone treatment surgeries in fields such as urology and gastroenterology. They are primarily used in conjunction with endoscopes to complete stone removal tasks and ensure the patient's normal urination function. Disposable stone removal baskets can be divided into three-wire baskets and four-wire baskets. The three-wire basket is more flexible and widely used. Currently, the basket head in the three-wire basket assembly structure is mostly fixed with nickel-titanium wire using heat shrink tubing. Due to its small size and precision components, assembly efficiency is low. Moreover, the overly precise components are subject to technical restrictions on imported materials, making manufacturing costs too high.

[0004] The current existing technical solution for the three-wire basket head assembly structure is mainly to pass three nickel-titanium drive wires through the head end tube and then drape them on the outer wall of the adjacent head end tube, and then use a heat shrink tube to tighten the head end tube and the draped nickel-titanium wires. In addition, CN219230031U mentions another solution, which is to pass the three nickel-titanium drive wires through the head end tube and then back into the adjacent head end tube. After passing through the adjacent head end tube, the three nickel-titanium wires are fixed to the inner wall of the outer sleeve, and the nickel-titanium wire at the other end is fixed in the limit tube. This technical solution requires pushing the limit tube in front of the outer sleeve forward to push out the basket wire. If a bend is encountered, the limit tube is likely to encounter resistance when pushing, and the basket wire is likely to fail to extend. Utility Model Content

[0005] The purpose of the utility model is to provide a stone removal basket assembly to solve the problems of small size of nickel-titanium wire in the stone removal basket component, low assembly efficiency and high manufacturing cost proposed in the above background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A stone retrieval basket component, a basket wire 11, the basket wire 11 is made of a nickel-titanium tube and has an integral structure of a tube part and a wire part.

[0008] It includes a head end tube, a basket wire 11 and an outer sheath tube 15.

[0009] There are no less than three head end tubes, one end of which is a free end and the other end is a fixed end, the fixed end extends into the outer sheath tube 15 for a distance and is fixedly connected to the outer sheath tube 15;

[0010] At least three head-end tubes form a basket claw 10;

[0011] The basket wire 11 has the same number of wire strands as the head tube. Each wire strand enters the fixed end of the head tube and exits the free end. It then sequentially enters the free end of the adjacent head tube, forming a 180° bend at the free end before exiting the fixed end. The three strands of wire that finally emerge converge within the outer sheath 15. These converged wire strands are connected to a handle slider via a drive component. Driven by the slider, the basket wire extends or retracts at the free end, pushing or pulling the free end of the head tube open or closed, causing the basket head to open or close.

[0012] The basket wire 11 includes a first nickel-titanium wire 111 , a second nickel-titanium wire 112 , a third nickel-titanium wire 113 and a head end 114 of the basket wire 11 , and the basket claw 10 includes a first head end tube 101 , a second head end tube 102 and a third head end tube 103 .

[0013] The position where the tail of the basket claw 10 meets the head end 114 of the basket wire 11 is tightened with a heat shrink tube 12; the three nickel-titanium wires passing through the lumen of the head end 114 of the basket wire 11 are fixedly connected to the stainless steel tube 13; the cable 14 is fixedly connected to the stainless steel tube 13; finally, the outer sheath 15 is put on the outside of the cable 14, and the fixed end of the basket claw 10 is fixed to one end of the outer sheath 15 by applying glue.

[0014] The head end 114 of the basket wire 11 is integrated with the three nickel-titanium wires.

[0015] The outer sheath 15 can be a composite braided tube, the material of which is a combination of PI, stainless steel, and PTFE, or a combination of PI, stainless steel, nylon, and Pebax; the outer sheath can also be a single-layer structure, the material of which is PI, PEEK, or nylon.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The utility model uses a basket wire in the stone removal basket assembly in the form of three nickel-titanium tubes integrated into one. The head end of the basket wire serves as a fixed end with a cavity, and the other end serves as a nickel-titanium wire end. During assembly, the fixed head end is larger in size, and the three nickel-titanium wires are all integrated with the fixed head end. The head end can be directly fixed and used for assembly. When the nickel-titanium wire passes through its own fixed head end tube cavity, it is better to operate and the assembly efficiency is high. When producing the basket wire, laser or process engraving and cutting are performed on a whole nickel-titanium plate, so that the finished product rate of the basket wire is high, a set of processing is faster and more convenient, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the basket head of the utility model;

[0019] Figure 2 This is a schematic diagram of the basket claw structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the basket wire structure of Example 1 of the present utility model;

[0021] Figure 4 This is a schematic diagram of the assembly structure of a nickel-titanium wire on a nickel-titanium tube of the utility model;

[0022] Figure 5 This is a schematic diagram of the assembly structure of the nickel-titanium tube and the basket claw of the utility model;

[0023] Figure 6 This is one of the assembly structure diagrams of the utility model;

[0024] Figure 7 This is the second schematic diagram of the assembly structure of the utility model;

[0025] Figure 8 This is a schematic diagram of the split structure of the utility model;

[0026] Figure 9 This is one of the schematic diagrams of the nickel-titanium wire structure in the second embodiment of the present utility model;

[0027] Figure 10 This is the second schematic diagram of the nickel-titanium wire structure in the second embodiment of the present utility model;

[0028] Figure 11 This is the third structural diagram of the nickel-titanium wire in the second embodiment of the present utility model;

[0029] Figure 12 This is a schematic diagram of the basket wire structure of the first embodiment of the utility model;

[0030] Figure 13 This is one of the schematic diagrams of the nickel-titanium wire structure in the fourth embodiment of the present utility model;

[0031] Figure 14 This is the second schematic diagram of the nickel-titanium wire structure in the fourth embodiment of the present utility model.

[0032] In the figure: 10, basket claw; 101, head end tube; 102, head end tube; 103, head end tube; 11, basket wire; 111, nickel titanium wire; 112, nickel titanium wire; 113, nickel titanium wire; 114, head end; 12, heat shrink tube; 13, stainless steel tube; 14, cable; 15, outer sheath. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] A stone retrieval basket assembly comprises a basket wire 11. The basket wire 11 is an integral structure made of a nickel-titanium tube and has a tube portion and a wire portion.

[0036] It includes a head end tube, a basket wire 11 and an outer sheath tube 15.

[0037] There are no less than three head end tubes, one end of which is a free end and the other end is a fixed end, the fixed end extends into the outer sheath tube 15 for a distance and is fixedly connected to the outer sheath tube 15;

[0038] At least three head-end tubes form a basket claw 10;

[0039] The basket wire 11 has the same number of wire strands as the head tube. Each wire strand enters the fixed end of the head tube and exits the free end. It then sequentially enters the free end of the adjacent head tube, forming a 180° bend at the free end before exiting the fixed end. The three strands of wire that finally emerge converge within the outer sheath 15. These converged wire strands are connected to a handle slider via a drive component. Driven by the slider, the basket wire extends or retracts at the free end, pushing or pulling the free end of the head tube open or closed, causing the basket head to open or close.

[0040] The basket wire 11 includes a first nickel-titanium wire 111 , a second nickel-titanium wire 112 , a third nickel-titanium wire 113 and a head end 114 of the basket wire 11 , and the basket claw 10 includes a first head end tube 101 , a second head end tube 102 and a third head end tube 103 .

[0041] The position where the tail of the basket claw 10 meets the head end 114 of the basket wire 11 is tightened with a heat shrink tube 12; the three nickel-titanium wires passing through the lumen of the head end 114 of the basket wire 11 are fixedly connected to the stainless steel tube 13; the cable 14 is fixedly connected to the stainless steel tube 13; finally, the outer sheath 15 is put on the outside of the cable, and the fixed end of the basket claw 10 is fixed to one end of the outer sheath 15 by applying glue.

[0042] The head end 114 of the basket wire 11 is integrated with the three nickel-titanium wires.

[0043] The outer sheath 15 can be a composite braided tube, the material of which is a combination of PI, stainless steel, and PTFE, or a combination of PI, stainless steel, nylon, and Pebax; the outer sheath can also be a single-layer structure, the material of which is PI, PEEK, or nylon.

[0044] like Figure 4 As shown, the nickel-titanium wires on the basket wire 11 are reversed into the end tube cavity. All nickel-titanium wires on the basket wire 11 are formed in this way and then used in combination with other components.

[0045] like Figure 3 As shown, the length of the fixed end of the nickel-titanium wire of the basket wire 11 can be a longer head-shaped end, or it can be as shown in FIG. Figure 12 As shown, the fixed end of the nickel-titanium wire on the basket wire 11 may also be a headless end with a length of 0.1-0.4 mm.

[0046] Example 2

[0047] A stone retrieval basket assembly comprises a basket wire 11. The basket wire 11 is an integral structure made of a nickel-titanium tube and has a tube portion and a wire portion.

[0048] It includes a head end tube, a basket wire 11 and an outer sheath tube 15.

[0049] There are no less than three head end tubes, one end of which is a free end and the other end is a fixed end, the fixed end extends into the outer sheath tube 15 for a distance and is fixedly connected to the outer sheath tube 15;

[0050] At least three head-end tubes form the basket claw 10 .

[0051] like Figure 9 As shown, the basket wire 11 and the nickel-titanium wire thereon are cut into three long nickel-titanium wires through a long nickel-titanium plate. The ends of the nickel-titanium plate are not cut, and are connected by rolling the ends to form a tubular rear wall. The cross-sectional shape of the formed nickel-titanium tube is circular (as shown in FIG. Figure 10 As shown), triangle (as Figure 11 As shown) or N-gon, N ≥ 4. When used, as Figure 4-5As shown, the nickel-titanium wires on the basket wire 11 are reversed into the end tube cavity. All nickel-titanium wires on the basket wire 11 are formed in this way and then used in combination with other components.

[0052] Example 3

[0053] A stone retrieval basket assembly comprises a basket wire 11. The basket wire 11 is an integral structure made of a nickel-titanium tube and has a tube portion and a wire portion.

[0054] It includes a head end tube, a basket wire 11 and an outer sheath tube 15.

[0055] There are no less than three head end tubes, one end of which is a free end and the other end is a fixed end, the fixed end extends into the outer sheath tube 15 for a distance and is fixedly connected to the outer sheath tube 15;

[0056] At least three head-end tubes form the basket claw 10 .

[0057] like Figure 13-14 The basket wire 11 and the nickel-titanium wire thereon are cut into the following shapes through a nickel-titanium plate: Figure 13 The shape shown is heat treated and formed, and the middle ring and the outer periphery are provided with three nickel-titanium wires. Figure 14 (As shown) Pass the other end of the nickel-titanium wire through the middle ring and assemble it with other components.

[0058] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A stone retrieval basket assembly, comprising a basket wire (11), characterized in that: The basket wire (11) is an integral structure made of a nickel-titanium tube and having a tube portion and a wire portion; it comprises a basket wire (11), a head end tube, and an outer sheath tube (15); There are no less than three head-end tubes, one end of which is a free end and the other end is a fixed end, the fixed end extends into the outer sheath tube (15) for a distance and is fixedly connected to the outer sheath tube (15); at least three head-end tubes form a basket claw (10); The number of wire strips on the basket wire (11) is the same as that of the head end tube, and each wire strip enters from the fixed end of the head end tube, exits from the free end of the head end tube, and then sequentially enters the free end of the adjacent head end tube, and forms a 180° shaping bend at the free end, and finally exits from the fixed end; the basket wire strips that finally pass through are gathered inside the outer sheath tube (15), and the three gathered basket wire strips can be connected to the handle slider through a driving component, and driven by the slider, the basket wire extends or retracts at the free end, pushing or pulling the free end of the head end tube, so that the basket head is in an open or closed state; The basket wire (11) comprises a first nickel-titanium wire (111), a second nickel-titanium wire (112), a third nickel-titanium wire (113) and a head end (114) of the basket wire (11); the basket claw (10) comprises a first head end tube (101), a second head end tube (102) and a third head end tube (103); the head end (114) of the basket wire (11) and the three nickel-titanium wires are an integrated structure.

2. The stone removal basket assembly according to claim 1, characterized in that: The position where the tail of the basket claw (10) is connected to the head end (114) of the nickel-titanium tube is shrunk with a heat shrink tube (12); the three nickel-titanium wires passing through the tube cavity of the head end (114) of the basket wire (11) are fixedly connected to the stainless steel tube (13); the cable (14) is fixedly connected to the stainless steel tube (13); finally, the outer sheath tube (15) is put on the outside of the cable (14), and the fixed end of the basket claw (10) is fixed to one end of the outer sheath tube (15) by applying glue.

3. The stone retrieval basket assembly according to claim 1, characterized in that: The outer sheath tube (15) can be a composite braided tube, the material of which is a combination of PI, stainless steel, and PTFE, or a combination of PI, stainless steel, nylon, and Pebax; the outer sheath tube can also be a single-layer structure, the material of which is PI, PEEK, or nylon.

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