Calculus removing mesh basket with directional barrier

Abstract

The utility model relates to a calculus removing mesh basket with a directional barrier. The calculus removing mesh basket comprises an outer tube, an inhaul cable and a handle assembly. The inhaul cable penetrates through the outer pipe, and the rear end of the inhaul cable is connected with the handle assembly. The rear end of the calculus removing net is fixedly connected with the front end of the inhaul cable, a calculus removing opening is formed in the calculus removing net, and the calculus removing opening is formed in the side direction; when the pull rope retracts the calculus removing net into the outer pipe, the calculus removing net retracts in the radial direction until the calculus removing opening is closed; and when the pull rope pushes the calculus removing net out of the outer tube, the calculus removing net is bounced off until the calculus removing opening is opened. When the calculus is extracted, the basket wire is provided with the net bag, the calculus can be extracted at the opening of the net basket, the net bag shields the pancreatic duct opening when the duodenum and the nipples are finally withdrawn, and after the calculus is taken out, the handle is pushed and pulled to take out the calculus, so that the occurrence of pancreatitis caused by broken stone or broken slag passing through the pancreatic duct is avoided.

Description

Technical Field

[0001] The utility model relates to medical equipment, in particular to a stone-taking net basket with a directional barrier. Background Art

[0002] Through endoscopic retrograde cholangiopancreatography (ERCP) + endoscopic sphincterotomy (EST), common bile duct stone removal surgery is performed under endoscopy. Stone removal basket products will be used during the operation.

[0003] The current problems with most stone retrieval baskets on the market are: During ERCP+EST surgery, most stone retrieval baskets are single-lumen (single basket lumen) or double-lumen with a quick exchange port (an additional guidewire lumen on the basket lumen). When the choledochoscope passes through the duodenal papilla and reaches the upper part of the common bile duct, it will pass through the pancreatic duct. Bile duct stones vary in size. If large stones are encountered, laser lithotripsy is also required, which will produce more stone fragments or fine debris. If no protective measures are taken, the stone fragments or debris will pass through the pancreatic duct and cause pancreatitis. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, to provide a stone removal basket with a directional barrier, and to solve the problem that the current stone removal basket, during the process of treating common bile duct stones, may easily cause an impact on the pancreatic duct due to broken stones or debris.

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

[0006] A stone extraction basket with a directional barrier is provided, comprising:

[0007] Outer tube, cable and handle assembly;

[0008] The pull cable is inserted into the outer tube, and its rear end is connected to the handle assembly;

[0009] A stone taking net, the rear end of which is fixedly connected to the front end of the cable, and a stone taking opening is provided on the stone taking net, and the stone taking opening is provided laterally;

[0010] When the cable draws the stone-collecting net into the outer tube, the stone-collecting net contracts radially until the stone-collecting opening is closed;

[0011] When the pull cable pushes the stone taking net out of the outer tube, the stone taking net pops open until the stone taking opening is opened.

[0012] Further, the stone extraction network includes

[0013] A plurality of longitudinal mesh wires, a mesh bag and a guide head;

[0014] Each longitudinal mesh is distributed in the longitudinal direction of the net bag and is fixedly connected to the net bag. The net bag and the front end guide of each longitudinal mesh are fixedly connected. The net bag and the rear end of each longitudinal mesh are fixedly connected to the cable.

[0015] The stone taking opening is formed between two longitudinal mesh wires at the edges of both sides of the net bag.

[0016] Furthermore, a butt joint is provided at the rear end of the net bag and each longitudinal mesh wire, and the rear end of the butt joint is fixedly connected to the cable.

[0017] Furthermore, the outer tube is a double-lumen tube, including a cable lumen and an injection lumen;

[0018] The handle assembly includes a three-way pipe and a push-pull handle;

[0019] The cable is located in the cable cavity, and the rear end of the cable is connected to the push-pull handle.

[0020] Furthermore, the longitudinal mesh wire is made of nickel-titanium alloy, and the net bag is made of nylon.

[0021] Furthermore, the number of the longitudinal mesh wires is 5.

[0022] Furthermore, when the stone taking net is opened, the angle of the stone taking opening is 120°.

[0023] Furthermore, the seeker includes

[0024] An outer guide head and an inner tube, wherein the front end of the inner tube is fixedly connected to the outer guide head, and the rear end of the inner tube is crimped together with the net bag and each longitudinal mesh wire.

[0025] The beneficial effects of the utility model are:

[0026] The utility model provides a stone removal net basket with a directional barrier, and the stone removal opening is opened laterally. When the stone is removed, the basket wire is provided with a net bag, so the stone can be removed at the opening of the net basket. When the duodenal papilla is finally withdrawn, the net bag blocks the pancreatic duct opening. After the stone is removed, the handle is pushed and pulled to remove the stone, thereby preventing the stone or debris from passing through the pancreatic duct and causing pancreatitis. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of a stone-taking net basket with a directional barrier of the utility model;

[0029] Figure 2 It is a structural diagram between the stone extraction net and the outer tube;

[0030] Figure 3 It is a longitudinal view of the stone extraction network;

[0031] Among them, 1, outer tube, 2, handle assembly, 21, tee tube, 22, push-pull handle;

[0032] 3. Cable, 31. Butt-joint pipe;

[0033] 4. Stone-collecting net, 41. Longitudinal mesh wire, 42. Net bag, 43. Guide head, 44. Stone-collecting opening. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] The present application provides a stone-removing basket with a directional barrier, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0036] In order to solve the technical problem that the stone removal basket in the prior art may easily affect the pancreatic duct when crushing stones or debris during the process of treating common bile duct stones, an embodiment of the present application provides a stone removal basket with a directional barrier, which is described in detail below.

[0037] like Figures 1 to 3 As shown, a stone extraction basket with a directional barrier comprises

[0038] An outer tube 1, a cable 3 and a handle assembly 2;

[0039] The pull cable 3 is inserted into the outer tube 1, and its rear end is connected to the handle assembly 2;

[0040] A stone taking net 4, the rear end of which is fixedly connected to the front end of the cable 3, and a stone taking opening 44 is provided on the stone taking net 4, and the stone taking opening 44 is provided laterally;

[0041] When the cable 3 receives the stone-collecting net 4 into the outer tube 1, the stone-collecting net 4 contracts radially until the stone-collecting opening 44 is closed;

[0042] When the pull cable 3 pushes the stone taking net 4 out of the outer tube 1, the stone taking net 4 pops open until the stone taking port 44 is opened.

[0043] Specifically, as an optional implementation in this embodiment, Figures 1 to 3 As shown, the stone taking network 4 includes

[0044] A plurality of longitudinal mesh wires 41, a net bag 42 and a guide head 43;

[0045] Each longitudinal mesh wire 41 is distributed in the longitudinal direction of the net bag 42 and is fixedly connected to the net bag 42. The net bag 42 and the front end guide head 43 of each longitudinal mesh wire 41 are fixedly connected. The rear end of the net bag 42 and each longitudinal mesh wire 41 is fixedly connected to the cable 3.

[0046] The stone taking opening 44 is formed between two longitudinal mesh wires 41 at the two side edges of the net bag 42 .

[0047] When the stone-removing net 4 is received in the outer tube 1 , the guide head 43 moves to the front end of the outer tube 1 .

[0048] Specifically, as an optional implementation in this embodiment, Figure 2 Figure 3 As shown, a butt-joint pipe 31 is provided at the rear end of the net bag 42 and each longitudinal mesh wire 41 , and the rear end of the butt-joint pipe 31 is fixedly connected to the cable 3 .

[0049] The butt-joint pipe 31 is a stainless steel pipe, and both the front and rear ends are connected by riveting.

[0050] Specifically, as an optional implementation in this embodiment, Figure 1 As shown, the outer tube 1 is a double-lumen tube, including a drawstring 3 lumen and a liquid injection lumen;

[0051] The handle assembly 2 includes a three-way pipe 21 and a push-pull handle 22;

[0052] The cable 3 is located in the cable 3 cavity, and the rear end of the cable 3 is connected to the push-pull handle 22 .

[0053] The three-way pipe 21 is provided with a liquid injection port, which is communicated with the liquid injection cavity in the outer tube 1 .

[0054] The push-pull handle 22 can also be changed into a rotating handle.

[0055] Specifically, as an optional implementation in this embodiment, the longitudinal mesh wire 41 is made of nickel-titanium alloy, and the net bag 42 is made of nylon.

[0056] Nickel-titanium alloy is a memory alloy. When it enters the human body and reaches a predetermined temperature, the longitudinal mesh wires 41 begin to expand, thereby turning the stone removal net 4 into a lantern-shaped structure.

[0057] In this embodiment, Figure 3 As shown, the number of the longitudinal mesh wires 41 is 5.

[0058] When the stone taking net 4 is opened, the angle of the stone taking opening 44 is 120°.

[0059] The angle of the stone-taking net 4 should be controlled to be less than 180°.

[0060] Specifically, as an optional implementation in this embodiment, Figure 2 and Figure 3 As shown, the guide head 43 includes

[0061] The outer guide head and the inner guide head, the front end of the inner guide head is fixedly connected to the outer guide head, and the rear end of the inner guide head is crimped together with the net bag 42 and each longitudinal mesh wire 41.

[0062] The outer guide head and the inner pipe are welded together, the rear end of the inner pipe extends out of the outer guide head, and the inner pipe and the stone taking net 4 are riveted.

[0063] In this embodiment, the outer guide head is a hat-shaped structure.

[0064] The use method of the stone-taking net basket with directional barrier of the utility model:

[0065] 1. Retract the stone removal net 4 into the outer tube 1, and then insert it to the stone position through the choledochoscopic endoscope;

[0066] 2. Push and pull the handle 22 to extend the stone removal net 4 out of the outer tube 1, and place the opening on one side of the stone removal net 4 to remove the stone;

[0067] 3. Slowly withdraw the stone removal net 4 and the stone, adjust the direction of the stone removal opening 44 of the stone removal net 4 (towards the direction away from the pancreatic duct), and withdraw the duodenal papilla.

[0068] The advantages of the stone-taking net basket with directional barrier of the utility model are:

[0069] When the stones are collected, the longitudinal mesh 41 is provided with a net bag 42, so the stones can be collected at the opening of the net basket. The net bag 42 shields the pancreatic duct opening, thereby preventing the stones or debris from passing through the pancreatic duct and causing pancreatitis.

[0070] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0071] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0073] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0074] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0075] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0076] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A stone-taking basket with a directional barrier, characterized in that: include Outer tube, cable and handle assembly; The pull cable is inserted into the outer tube, and its rear end is connected to the handle assembly; A stone taking net, the rear end of which is fixedly connected to the front end of the cable, and a stone taking opening is provided on the stone taking net, and the stone taking opening is provided laterally; When the cable draws the stone-collecting net into the outer tube, the stone-collecting net contracts radially until the stone-collecting opening is closed; When the pull cable pushes the stone taking net out of the outer tube, the stone taking net pops open until the stone taking opening is opened.

2. The stone-removing basket with directional barrier according to claim 1 is characterized in that: The stone extraction network comprises A plurality of longitudinal mesh wires, a mesh bag and a guide head; Each longitudinal mesh wire is distributed in the longitudinal direction of the net bag and is fixedly connected to the net bag. The net bag and the front end guide head of each longitudinal mesh wire are fixedly connected. The net bag and the rear end of each longitudinal mesh wire are fixedly connected to the cable. The stone taking opening is formed between two longitudinal mesh wires at the edges of both sides of the net bag.

3. The stone-removing basket with directional barrier according to claim 2 is characterized in that: The net bag and the rear ends of each longitudinal mesh wire are provided with a butt-joint pipe, and the rear ends of the butt-joint pipe are fixedly connected with the cable.

4. The stone-removing basket with directional barrier according to claim 1 is characterized in that: The outer tube is a double-lumen tube, including a cable lumen and a liquid injection lumen; The handle assembly includes a three-way pipe and a push-pull handle; The cable is located in the cable cavity, and the rear end of the cable is connected to the push-pull handle.

5. The stone-removing basket with directional barrier according to claim 2 is characterized in that: The longitudinal mesh wire is made of nickel-titanium alloy, and the net bag is made of nylon.

6. The stone-removing basket with directional barrier according to claim 2, characterized in that: The number of the longitudinal mesh wires is 5.

7. The stone-removing basket with directional barrier according to claim 2 is characterized in that: When the stone taking net is opened, the angle of the stone taking opening is 120°.

8. The stone-removing basket with directional barrier according to claim 2, characterized in that: The seeker includes An outer guide head and an inner tube, wherein the front end of the inner tube is fixedly connected to the outer guide head, and the rear end of the inner tube is crimped together with the net bag and each longitudinal mesh wire.

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