Endoscope calculus removing mesh basket structure

Abstract

In order to solve the problems that in the prior art, an endoscopic calculus removing mesh basket structure is poor in development in an operation and cannot be bent along with an endoscope at multiple angles, the endoscopic calculus removing mesh basket structure comprises a mandrel and a mesh basket assembly, the mandrel comprises a trunk section and a guide section, the guide section comprises a development spring tube, and the development spring tube is connected with the mesh basket assembly. The mesh basket assembly comprises mesh basket wires and a mesh basket structure, the mesh basket wires are connected with the mesh basket structure, the mesh basket structure is located at the end of the mandrel, the developing spring tube is arranged on the periphery of the mesh basket wires in a sleeving mode, and the mesh basket wires are memory metal wires. According to the endoscopic calculus removing mesh basket structure, the developing spring tube is connected with the mesh basket wire in the sleeved mode, so that the guiding section has the good memory metal function and twisting resistance performance, multi-angle smooth opening, closing and bending of the calculus removing mesh basket are achieved, the developing spring tube of the guiding section plays a developing role, and compared with an existing calculus removing mesh basket product, the endoscopic calculus removing mesh basket structure has the advantages of being simple in structure and convenient to use. And the effects of multi-angle bending in the calculus removing process of the calculus removing net basket and improvement of the calculus removing view definition can be taken into consideration at the same time.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices, and particularly relates to an endoscopic stone extraction basket structure. Background Art

[0002] Human body stones are solid lumps formed in the cavities of the human body or in the cavities of cavity organs (such as the kidney, ureter, gallbladder or bladder, etc.). Stones can cause obstruction of the cavity, affect the discharge of fluids from the corresponding organs, and cause symptoms such as pain, bleeding or secondary infection. The stone extraction basket structure is widely used in the treatment of stone diseases in different surgical fields such as urology and biliary tract. Effectively grasping and removing stones is an important issue in the treatment of stones.

[0003] In the existing stone extraction basket structure / products, the basket mandrel generally only has the functions of pushing and pulling, and it is difficult to bend arbitrarily with the flexible endoscope, which affects the original bending angle of the flexible endoscope, making it impossible for the operator to extract stones in real time using the endoscope during the operation, and is not conducive to the progress of the operation. In addition, clearly identifying the position of the stone and accurately positioning it during the operation are the keys to successful stone extraction. The smooth surface of the existing stone extraction basket structure will produce specular reflection on the incident sound wave of the ultrasound under ultrasound imaging, affecting the clarity of the field of view at the interface between the stone extraction basket structure and the biological tissue during the operation, and further affecting the accuracy and safety of the clinical endoscopic stone extraction operation. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an endoscopic stone extraction basket structure aiming at the problems of poor imaging during the operation of the existing endoscopic stone extraction basket structure and the inability to bend at multiple angles with the flexible endoscope.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] Provide an endoscopic stone extraction basket structure, including a mandrel and a basket assembly. The mandrel includes a main trunk section and a guiding section. One end of the guiding section is connected to the main trunk section. The guiding section includes a developing spring tube. The basket assembly includes basket wires and a basket structure. The basket wires are connected to the basket structure. The basket structure is located at the end of the mandrel. The developing spring tube is sleeved on the outer periphery of the basket wires. The basket wires are memory metal wires.

[0007] Optionally, the material of the basket wires includes nitinol, copper-zinc alloy, copper-nickel alloy or copper-aluminum alloy; the material of the developing spring tube includes platinum, tungsten or platinum-tungsten alloy; the main trunk section is a steel-like metal, and the material of the main trunk section includes nickel-iron alloy or stainless steel.

[0008] Optionally, the surface of the developing spring tube is provided with a pressed ring pattern, a pressed spiral pattern, a cross pattern, a hollow structure or a sandblasted surface.

[0009] Optionally, the guiding section further includes a first metal tube and a second metal tube. The first metal tube is disposed at the position where the main trunk section is connected to the developing spring tube, and the second metal tube is disposed at the end of the developing spring tube away from the main trunk section.

[0010] Optionally, the basket structure includes a plurality of metal wires. The plurality of metal wires are led out from the end of the mandrel and connected to the basket wires. The plurality of metal wires are woven with each other to form a three-dimensional net structure with a hollow interior.

[0011] Optionally, the mandrel further includes a first liner tube and a second liner tube. The inner diameter of the first liner tube is larger than the outer diameter of the main trunk section, and the first liner tube is sleeved on one end of the main trunk section away from the guiding section.

[0012] Optionally, the mandrel further includes a second liner tube. The inner diameter of the second liner tube is larger than the outer diameter of the first liner tube, and the second liner tube is sleeved on one end of the first liner tube away from the main trunk section.

[0013] Optionally, it further includes a sheath tube. The sheath tube is sleeved on the outer periphery of the mandrel and can axially displace along the mandrel. When the sheath tube displaces in the direction away from the basket structure, the basket structure is exposed at the end of the sheath tube; when the sheath tube displaces in the direction towards the basket structure, the basket structure is received in the sheath tube.

[0014] Optionally, it further includes a hand-held bracket. The sheath tube is slidably disposed on the hand-held bracket.

[0015] Optionally, it further includes an endoscope. The endoscope is a flexible hollow tubular structure. The mandrel is located in the endoscope. When the mandrel displaces in the direction away from the basket structure, the basket structure is received in the endoscope; when the mandrel displaces in the direction towards the basket structure, the basket structure is exposed at the end of the endoscope.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The endoscopic lithotripsy basket structure provided by the present utility model includes a mandrel and a basket assembly. The mandrel includes a main trunk section and a guiding section. One end of the guiding section is connected to the main trunk section. The guiding section includes a developing spring tube. The basket assembly includes basket wires and a basket structure. The basket wires are connected to the basket structure. The basket structure is located at the end of the mandrel. The developing spring tube is sleeved on the outer periphery of the basket wires. The basket wires are made of shape memory metal wires. Through the arrangement of sleeving and connecting the developing spring tube and the basket wires, the guiding section has good shape memory metal function and better anti-kinking performance. In specific applications, it can realize smooth opening and closing and bending of the lithotripsy basket at multiple angles without affecting the original bending angle of the flexible endoscope. Additionally, it can be developed under ultrasound / X-ray, and the developing spring tube of the guiding section plays a developing role, which is beneficial to improving the field of view clarity at the interface between the lithotripsy basket and biological tissues, and further improving the accuracy and safety of clinical endoscopic lithotripsy operations. In summary, the endoscopic lithotripsy basket structure provided by the present utility model can, compared with existing lithotripsy basket products, simultaneously take into account the multi-angle bending during the stone extraction process of the lithotripsy basket and the function of improving the clarity of the stone extraction field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an overall assembly schematic diagram of the mandrel and the basket assembly provided by the present utility model;

[0019] Figure 2 is a schematic diagram of the structure of the developing spring tube provided by the present utility model;

[0020] Figure 3 is the endoscopic lithotripsy basket structure provided by an embodiment of the present utility model;

[0021] Figure 4 is the endoscopic lithotripsy basket structure provided by another embodiment of the present utility model;

[0022] Figure 5 is the endoscopic lithotripsy basket structure provided by another embodiment of the present utility model;

[0023] Figure 6 is the endoscopic lithotripsy basket structure provided by another embodiment of the present utility model;

[0024] Figure 7 is the endoscopic lithotripsy basket structure provided by another embodiment of the present utility model.

[0025] The reference numerals in the accompanying drawings of the specification are as follows:

[0026] 1. Mandrel; 11 Main trunk section; 12 Guide section; 121 Developing spring tube; 122 First metal tube; 123 Second metal tube; 13 First liner tube; 14 Second liner tube; 2 Sheath tube; 3 Basket assembly; 31 Basket wires; 32 Basket structure; 4 Handheld bracket. Detailed implementation manners

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or a welded bonding connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] Referring to Figure 1 , an endoscopic stone extraction basket structure 32 according to an embodiment of the present utility model includes a mandrel 1 and a basket assembly 3. The mandrel 1 includes a main trunk section 11 and a guide section 12. One end of the guide section 12 is connected to the main trunk section 11. The guide section 12 includes a developing spring tube 121. The basket assembly 3 includes basket wires 31 and a basket structure 32. The basket wires 31 are connected to the basket structure 32. The basket structure 32 is located at the end of the mandrel 1. The developing spring tube 121 is sleeved on the outer periphery of the basket wires 31. The basket wires 31 are memory metal wires.

[0031] The utility model provides an endoscopic stone removal basket structure 32, including a core shaft 1 and a basket assembly 3, wherein the core shaft 1 includes a trunk section 11 and a guide section 12, one end of the guide section 12 is connected to the trunk section 11, the guide section 12 includes a developing spring tube 121, the basket assembly 3 includes a basket wire 31 and a basket structure 32, the basket wire 31 is connected to the basket structure 32, the basket structure 32 is located at the end of the core shaft 1, the developing spring tube 121 is sleeved on the outer periphery of the basket wire 31, the basket wire 31 is a memory metal wire, and the developing spring tube 121 is sleeved and connected with the basket wire 31, so that the guide Segment 12 has good metal memory function and better anti-kink performance. In specific applications, it can realize multi-angle smooth opening and closing and bending of the stone removal basket without affecting the original bending angle of the soft mirror. In addition, during development under ultrasound / X-ray, the development spring tube 121 of the guide segment 12 plays a development role, which is beneficial to improve the clarity of the field of view at the interface between the stone removal basket and the biological tissue, and further improve the accuracy and safety of clinical endoscopic stone removal operations. In summary, the endoscopic stone removal basket structure 32 provided by the utility model, compared with existing stone removal basket products, can simultaneously take into account the multi-angle bending of the stone removal basket during the stone removal process and improve the clarity of the field of view for stone removal.

[0032] Specifically, the connection method between the trunk section 11 and the guide section 12 includes but is not limited to welding, crimping or bonding.

[0033] Specifically, refer to Figures 3 to 7 The basket structure 32 can be a three-wire basket structure, a four-wire basket structure, a spiral basket structure, or a diamond basket structure; specifically, the three-wire basket structure is generally composed of three nickel-titanium wires, is in a triangular cone shape, and has an open bottom surface, which can collect large and small stone fragments at the same time. The four-wire basket structure is easier to get close to the stone, which is conducive to successfully capturing the stone in the renal calyx. The diamond basket structure has a tough structure with an enlarged front end and a reduced tail end, which makes it easier to trap the stone and can be smoothly removed after being released. The semicircular basket structure is used to accurately capture stones of specific shapes or positions, and has strong flexibility and adaptability.

[0034] In one embodiment, the material of the basket wire 31 includes nickel-titanium alloy, copper-zinc alloy, copper-nickel alloy or copper-aluminum alloy; the material of the developing spring tube 121 includes platinum, tungsten or a platinum-tungsten alloy; the trunk section 11 is a steel metal, and the material of the trunk section 11 includes nickel-iron alloy or stainless steel.

[0035] Specifically, the basket wires 31 are made of shape memory metal. After sleeving and connecting the development spring tube 121 with the basket wires 31, the guiding section 12 has good shape memory metal function and better anti-kinking performance. Compared with the existing stone extraction basket products, the stone extraction basket prepared with shape memory metal in this application has an improved bending freedom degree for stone extraction. The material of the basket wires 31 includes but is not limited to nitinol, copper-zinc alloy, copper-nickel alloy or copper-aluminum alloy. In specific implementation, the material of the basket wires 31 is preferably nitinol, and nitinol has strong anti-folding performance;

[0036] The main trunk section 11 is made of steel-like metal. In specific implementation, the material of the main trunk section 11 is preferably stainless steel, which has the characteristics of high strength and good support. Using stainless steel to prepare the main trunk section 11 can meet the requirements of providing strong support and pushing force during the stone extraction process for the main trunk section 11;

[0037] The material of the development spring tube 121 can be tungsten or an alloy of platinum and tungsten. Since metallic tungsten has a strong imaging effect under X-ray, it enhances the visibility during the stone extraction operation, makes the ultrasonic signal clearer at the interface between the stone extraction basket and biological tissue, and can further improve the accuracy and safety of clinical intervention operations.

[0038] Refer to Figure 2 , in an embodiment, the surface of the development spring tube 121 is provided with a pressed ring pattern, a pressed spiral pattern, a cross pattern, a hollow structure or a sandblasted surface.

[0039] It should be noted that in endoscopic stone extraction, clearly identifying the location of the stone and accurately positioning it are the keys to successful stone extraction. However, the surface of the existing stone extraction basket is relatively smooth, and its smooth surface will produce specular reflection on the incident sound wave under ultrasonic imaging. Specular reflection will cause part of the sound wave energy to propagate in the direction opposite to the incident wave, resulting in image artifacts and thus affecting the accuracy of diagnosis.

[0040] Specifically, after the surface of the development spring tube 121 is provided with a pressed ring pattern, a pressed spiral pattern, a cross pattern, a hollow structure or a sandblasted surface, the surface of the development spring tube 121 has corresponding roughness. After the development spring tube 121 is roughened, a high echo reflection surface will be formed under ultrasonic guidance, making the brightness of the basket have a large contrast with the surrounding tissues, enhancing the ultrasonic imaging effect, and further enhancing the visual effect under ultrasonic guidance, making the ultrasonic signal clearer and distinguishable at the interface between the basket structure 32 and biological tissue, and can further improve the accuracy and safety of clinical intervention operations.

[0041] In one embodiment, the guiding section 12 further includes a first metal tube 122 and a second metal tube 123. The first metal tube 122 is disposed at the position where the main trunk section 11 is connected to the developing spring tube 121, and the second metal tube 123 is disposed at the end of the developing spring tube 121 away from the main trunk section 11.

[0042] Specifically, the first metal tube 122 is disposed at the position where the main trunk section 11 is connected to the developing spring tube 121, and the second metal tube 123 is disposed at the end of the developing spring tube 121 away from the main trunk section 11, that is, the developing spring tube 121 is located between the two metal tubes. Further, the first metal tube 122 and the second metal tube 123 play a role of limiting and blocking the developing spring tube 121. In addition, the basket wire 31 passes through the first metal tube 122 and is connected to the main trunk section 11, and the first metal tube 122 can provide rigid support for this section of the basket wire 31 passing through.

[0043] In one embodiment, the materials of the first metal tube 122 and the second metal tube 123 include nickel-iron alloy or stainless steel.

[0044] In one embodiment, the basket structure 32 includes a plurality of metal wires. The plurality of metal wires are led out from the end of the mandrel 1 and connected to the basket wire 31, and the plurality of metal wires are woven with each other to form a three-dimensional net structure with a hollow interior.

[0045] The materials of the plurality of metal wires of the basket structure 32 are shape memory metals, which meet the requirements for the elasticity and flexibility of the head of the basket structure 32 during the stone extraction operation. Further, when the stone extraction basket enters the body tissue, it can reduce the damage to the body tissue and reduce unnecessary injuries.

[0046] In one embodiment, the mandrel 1 further includes a first liner 13. The inner diameter of the first liner 13 is larger than the outer diameter of the main trunk section 11, and the first liner 13 is sleeved on one end of the main trunk section 11 away from the guiding section 12.

[0047] Specifically, the purpose of setting the inner diameter of the first liner 13 to be larger than the outer diameter of the main trunk section 11 is to sleeve the main trunk section 11 in the first liner 13.

[0048] In one embodiment, the mandrel 1 further includes a second liner 14. The inner diameter of the second liner 14 is larger than the outer diameter of the first liner 13, and the second liner 14 is sleeved on one end of the first liner 13 away from the main trunk section 11.

[0049] The setting that the inner diameter of the second liner 14 is larger than the outer diameter of the first liner 13 facilitates sleeving the first liner 13 in the second liner 14.

[0050] In one embodiment, it further includes a sheath tube 2, and the sheath tube 2 is sleeved on the outer periphery of the mandrel 1 in an axially displaceable manner. When the sheath tube 2 is displaced in a direction away from the basket structure 32, the basket structure 32 is exposed at the end of the sheath tube 2; when the sheath tube 2 is displaced in a direction towards the basket structure 32, the basket structure 32 is received in the sheath tube 2.

[0051] In one embodiment, it further includes a hand-held bracket 4, and the sheath tube 2 is slidably arranged on the hand-held bracket 4.

[0052] Specifically, under the action of an external force, the axial movement of the mandrel 1 driven by the sheath tube 2 is controlled by controlling the movement state of the hand-held bracket 4.

[0053] In one embodiment, it further includes an endoscope. The endoscope is a bendable hollow tubular structure, and the mandrel 1 is located in the endoscope. When the mandrel 1 is displaced in a direction away from the basket structure 32, the basket structure 32 is received in the endoscope; when the mandrel 1 is displaced in a direction towards the basket structure 32, the basket structure 32 is exposed at the end of the endoscope.

[0054] Specifically, the endoscope has an instrument channel capable of accommodating the mandrel. After the mandrel is sleeved with the sheath tube, it is placed in the instrument channel of the endoscope. During the stone extraction operation, the mandrel 1 is manipulated by an external force. When the mandrel 1 moves axially as a whole, it will drive the axial movement of the basket assembly 3, so that one end of the basket assembly 3 extends out of the instrument channel of the endoscope and expands away from one end of the mandrel 1, or when it moves in a direction towards one end of the mandrel 1, one end of the basket assembly 3 retracts into the mandrel 1 and is received in the instrument channel of the endoscope. The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An endoscopic stone removal basket structure, characterized in that: It includes a core shaft and a basket assembly, the core shaft includes a main section and a guide section, one end of the guide section is connected to the main section, the guide section includes a developing spring tube, the basket assembly includes a basket wire and a basket structure, the basket wire is connected to the basket structure, the basket structure is located at the end of the core shaft, the developing spring tube is sleeved on the outer periphery of the basket wire, and the basket wire is a memory metal wire.

2. The endoscopic stone removal basket structure according to claim 1, characterized in that: The material of the basket wire includes nickel-titanium alloy, copper-zinc alloy, copper-nickel alloy or copper-aluminum alloy; the material of the developing spring tube includes platinum, tungsten or platinum-tungsten alloy; the trunk section is steel metal, and the material of the trunk section includes nickel-iron alloy or stainless steel.

3. The endoscopic stone removal basket structure according to claim 1, characterized in that: The surface of the developing spring tube is provided with pressed ring patterns, pressed spiral patterns, cross patterns, hollow structures or sandblasted surfaces.

4. The endoscopic stone removal basket structure according to claim 1, characterized in that: The guide section also includes a first metal tube and a second metal tube. The first metal tube is arranged at the position where the main section is connected to the developing spring tube, and the second metal tube is arranged on the end of the developing spring tube away from the main section.

5. The endoscopic stone removal basket structure according to claim 1, characterized in that: The basket structure includes a plurality of metal wires, which are led out from the end of the core shaft and connected to the basket wires. The plurality of metal wires are woven together to form a three-dimensional mesh structure with a hollow interior.

6. The endoscopic stone removal basket structure according to claim 1, characterized in that: The core shaft also includes a first liner, the inner diameter of the first liner is larger than the outer diameter of the trunk section, and the first liner is sleeved on one end of the trunk section away from the guide section.

7. The endoscopic stone removal basket structure according to claim 6, characterized in that: The core shaft also includes a second liner, the inner diameter of the second liner is larger than the outer diameter of the first liner, and the second liner is sleeved on an end of the first liner away from the main trunk section.

8. The endoscopic stone removal basket structure according to claim 1, characterized in that: It also includes a sheath tube, which can be axially displaced along the core shaft and sleeved on the outer periphery of the core shaft. When the sheath tube is displaced in a direction away from the basket structure, the basket structure is exposed at the end of the sheath tube; when the sheath tube is displaced in a direction toward the basket structure, the basket structure is accommodated in the sheath tube.

9. The endoscopic stone removal basket structure according to claim 8, characterized in that: It also includes a handheld bracket, on which the sheath tube is slidably arranged.

10. The endoscopic stone removal basket structure according to claim 1, characterized in that: It also includes an endoscope, which is a bendable hollow tubular structure. The core shaft is located in the endoscope. When the core shaft is displaced in a direction away from the basket structure, the basket structure is accommodated in the endoscope. When the core shaft is displaced in a direction toward the basket structure, the basket structure is exposed at the end of the endoscope.

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