Calculus removing mesh basket for choledochoscope

Abstract

The utility model provides a choledochoscope calculus removing net basket which comprises a metal net basket, an outer sheath tube and a handle, and the outer sheath tube is connected with the handle. The metal mesh basket comprises four mesh basket wires and a connecting rod, the head ends of the four mesh basket wires are fixedly connected together and are in an inverted omega shape, and the head end of the connecting rod is fixedly connected with the tail ends of the four mesh basket wires; the outer sheath tube comprises a drainage tube section I, a drainage tube section II and a drainage tube section III, and the head end of the metal net basket is contained in the drainage tube section I; the drainage tube section II is a four-channel tube, four channels I are formed in the drainage tube section II, and a mesh basket wire is accommodated in each channel I; the connecting rod is arranged in the drainage tube section III; the lower end of one side of the handle is biconcave, the upper end of the other side of the handle is provided with a push rod moving button, and a push rod is arranged in the handle and connected with the connecting rod and the push rod moving button. The calculi in the gall bladder or the bile duct can be extracted through the choledochoscope, the mesh basket wires form the spherical mesh basket from small to large when being led out through the four channels, the spherical mesh basket is stable in shape, and the calculi of different sizes can be extracted conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a choledochoscope lithotripsy basket. Background Art

[0002] Gallstones are a common and frequently occurring disease in my country, including gallbladder stones, intrahepatic bile duct stones, and common bile duct stones. Stones blocking the cystic duct or bile duct can induce complications such as acute cholecystitis, acute cholangitis, obstructive jaundice, and acute biliary pancreatitis, and can even lead to life-threatening septic shock. Long-term irritation from stones carries the risk of gallbladder and bile duct cancer.

[0003] Choledochoscopic lithotripsy is one of the commonly used surgical options for hepatobiliary surgery to treat gallbladder and intrahepatic and extrahepatic bile duct stones. A stone removal basket is an essential device for choledochoscopic lithotripsy. Various types of stone removal baskets currently in use are composed of an outer sheath, a basket, and a handle. The basket is usually composed of four basket wires, forming various shapes such as spherical, diamond, and raindrop shapes. The four basket wires are intertwined at the head ends and connected to a metal connecting rod after converging at the tail ends. The four basket wires can be retracted into the outer sheath to facilitate the basket's entry into the choledochoscope's forceps; the four basket wires are pushed out of the outer sheath to form balloons of different diameters, making it easier to remove stones of different diameters.

[0004] The following problems exist in clinical practice: 1. The basket cavity formed after the four basket wires are completely pushed out of the outer sheath is the largest, the distance between the four basket wires is consistent, and the basket shape is stable. It is mainly used to remove larger stones, but smaller stones can easily be dislodged through the gaps between the basket wires. 2. To remove smaller stones, the basket connecting rod can be pulled back, and the basket wires can enter the outer sheath. The basket cavity at the tip of the outer sheath becomes smaller, which can prevent small stones from being dislodged through the gaps between the basket wires. It is also possible to push out some of the basket wires to form a basket cavity of appropriate size, which is convenient for removing smaller stones. However, some of the basket wires are located in the outer sheath cavity, and some of the basket wires are located at the tip of the outer sheath. The spacing between the four basket wires is difficult to maintain consistent, resulting in an unstable basket shape, making it difficult to remove smaller stones. Removal of stones is also prone to being dislodged between adjacent basket wires with the largest spacing. Utility Model Content

[0005] In response to the above technical problems, a choledochoscope lithotripsy basket is provided. The technical means adopted by the utility model are as follows:

[0006] A choledochoscope lithotripsy basket comprises a metal basket, an outer sheath and a handle, wherein the tail end of the outer sheath is connected to the head end of the handle;

[0007] The metal basket comprises four basket wires and a connecting rod, the head ends of the four basket wires are fixedly connected together and form an inverted Ω shape, and the head end of the connecting rod is fixedly connected to the tail ends of the four basket wires;

[0008] The outer sheath includes a drainage tube segment I, a drainage tube segment II, and a drainage tube segment III. The head end of the metal mesh basket is accommodated in the drainage tube segment I. The drainage tube segment II is a four-channel tube having four spaced-apart channels I therein. The channels I are connected to the interiors of the drainage tube segments I and III, and each channel I accommodates a mesh basket wire. The connecting rod is placed in the drainage tube segment III.

[0009] The lower end of one side of the handle is double-concave, and the upper end of the other side of the handle is provided with a concave push rod moving button. A push rod is provided inside the handle, one end of the push rod is connected to the tail end of the connecting rod, and the other end is connected to the push rod moving button.

[0010] Furthermore, the four channels are evenly distributed along the circumferential direction, the four basket wires are arranged at equal intervals along the circumferential direction, and the four basket wires form spherical baskets from small to large when they are led out through the four channels.

[0011] Furthermore, the drainage tube section I is a single-channel tube having a first single channel inside, and the first single channel is connected to the four channels and is used to accommodate the head end of the metal mesh basket.

[0012] Furthermore, the drainage tube section III is a single-channel tube having a second single channel inside, the second single channel is connected to one of the four channels, and the connecting rod is placed in the second single channel.

[0013] Furthermore, the handle is a single-channel tube having a third single channel inside, the third single channel is connected to the second single channel, and the push rod is placed in the third single channel.

[0014] Furthermore, a connecting cap is provided at the head end of the handle, and the outer sheath is fixed to the handle through the connecting cap.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The outer sheath tube head end of the utility model is provided with a separate channel for four basket wires to pass through. Pushing and pulling the basket wires can form basket cavities of different sizes. The spacing between the four basket wires remains constant, forming a stable basket cavity structure, which can be used to sheath stones of different sizes, and the sheathed stones are difficult to fall off.

[0017] 2. The outer sheath tube head end of the utility model is provided with separate channels for four basket wires to pass through, which can limit the transition of the basket wires out of the outer sheath tube.

[0018] 3. The outer sheath tube head end of the utility model is a single-channel tube for accommodating the interwoven basket wire heads.

[0019] Based on the above reasons, the present invention can be widely promoted in the fields of medical treatment and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a schematic structural diagram of the present invention, wherein the basket wire is moved out of the outer sheath.

[0022] Figure 2 This is a structural diagram of the utility model in which the basket wire is accommodated in the outer sheath tube.

[0023] Figure 3 This is a structural diagram of the head ends of four basket wires of the present invention.

[0024] Figure 4 This is a schematic structural diagram of the outer sheath tube of the present utility model.

[0025] Figure 5 This is a schematic diagram of the local structure of the metal mesh basket of the utility model being moved out of the outer sheath tube.

[0026] Figure 6 This is a schematic diagram of the partial structure of the metal mesh basket of the utility model being accommodated in the outer sheath tube.

[0027] In the figure: 1. Metal mesh basket; 11. Mesh basket wire; 12. Connecting rod; 2. Outer sheath; 21. Drainage tube segment I; 22. Drainage tube segment II; 23. Drainage tube segment III; 24. Channel 1; 3. Handle; 31. Push rod movement button; 32. Connecting cap. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The utility model provides a choledochoscope lithotripsy basket, comprising a metal basket 1, an outer sheath tube 2 and a handle 3. The tail end of the outer sheath tube 2 is connected to the head end of the handle 3.

[0030] The metal mesh basket 1 consists of four mesh basket wires 11 and a connecting rod 12 , wherein the head ends of the four mesh basket wires 11 are fixedly connected together and form an inverted Ω shape, and the head end of the connecting rod 12 is fixedly connected to the tail ends of the four mesh basket wires 11 .

[0031] The outer sheath 2 comprises drainage tube segment I 21, drainage tube segment II 22, and drainage tube segment III 23. Drainage tube segment I 21 is a single-channel tube, housing the head end of the metal mesh basket 1. Drainage tube segment II 22 is a four-channel tube, internally provided with four spaced-apart channels I 24. Channels I 24 communicate with the interiors of drainage tube segment I 21 and drainage tube segment III 23, each channel I 24 housing a mesh basket wire 11. Drainage tube segment III 23 is a single-channel tube with an internal connecting rod 12. The four channels I 24 are evenly spaced along the circumference, with the four mesh basket wires 11 spaced evenly apart. When the four mesh basket wires 11 are drawn through the four channels I 24, they form a spherical mesh basket from small to large. Drainage tube segment I 21 has a first single channel internally, which communicates with the four channels I 24. Drainage tube segment III 23 has a second single channel internally, which communicates with the four channels I 24.

[0032] The handle 3 is a single-channel tube with a push rod inside. The handle 3 has a third single channel inside, which is connected to the second single channel. The push rod is placed inside the third single channel. A connecting cap 31 is provided at the head end of the handle 3 to secure the outer sheath 2 to the handle 3. The lower end of one side of the handle 3 is biconcave, and the upper end of the other side of the handle 3 is equipped with a concave push rod movement button 32. One end of the push rod is connected to the tail end of the connecting rod 12, and the other end is connected to the push rod movement button 31.

[0033] The utility model can be used to remove stones in the gallbladder or bile duct through a choledochoscope. When the basket wires are led out through four channels, spherical baskets from small to large are formed. The basket wires are evenly spaced, and the spherical basket shape is stable, which is convenient for removing stones of different sizes.

[0034] The choledochoscope is inserted into the gallbladder, common bile duct, or intrahepatic bile duct to locate the stone. A stone retrieval basket with a basket wire retracted into the outer sheath is inserted through the choledochoscope's forceps. The outer sheath of the basket is exposed in the choledochoscope's field of view and passes over the stone into the distal bile duct. By pushing the push rod button, the basket wires are moved out of the outer sheath, creating a basket cavity sized to the stone. The basket is then retracted to enclose the stone. By pulling back on the push rod button, the basket wires enter the outer sheath, narrowing the basket cavity and enclosing the stone. The choledochoscope is withdrawn and the stone is removed. By pushing the push rod button, the basket wires are moved out of the outer sheath, widening the basket cavity, and the stone can fall out through the gaps between the basket wires. By pulling back on the push rod button, the basket wires are fully reentered into the outer sheath, allowing the choledochoscope's forceps to be re-entered for stone removal.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A choledochoscope stone removal basket, characterized in that: include: A metal mesh basket (1), an outer sheath tube (2) and a handle (3), wherein the tail end of the outer sheath tube (2) is connected to the head end of the handle (3); The metal mesh basket (1) comprises four mesh basket wires (11) and a connecting rod (12), the head ends of the four mesh basket wires (11) are fixedly connected together and form an inverted Ω shape, and the head end of the connecting rod (12) is fixedly connected to the tail ends of the four mesh basket wires (11); The outer sheath tube (2) includes a drainage tube section I (21), a drainage tube section II (22) and a drainage tube section III (23), and the head end of the metal mesh basket (1) is accommodated in the drainage tube section I (21); the drainage tube section II (22) is a four-channel tube, and four channel I (24) are arranged at intervals inside, and the channel I (24) is connected to the interior of the drainage tube section I (21) and the drainage tube section III (23), and each channel I (24) accommodates a mesh basket wire (11); the connecting rod (12) is placed in the drainage tube section III (23); The lower end of one side of the handle (3) is double-concave, and the upper end of the other side of the handle (3) is provided with a concave push rod moving button (31). A push rod is provided inside the handle (3), one end of the push rod is connected to the tail end of the connecting rod (12), and the other end is connected to the push rod moving button (31).

2. The choledochoscope stone removal basket according to claim 1, characterized in that: The four channels (24) are evenly distributed along the circumference, the four basket wires (11) are arranged at equal intervals along the circumference, and the four basket wires (11) form spherical baskets from small to large when they are led out through the four channels (24).

3. The choledochoscope stone removal basket according to claim 1, characterized in that: The drainage pipe section I (21) is a single-channel pipe having a first single channel inside. The first single channel is connected to the four channels (24) and is used to accommodate the head end of the metal mesh basket (1).

4. The choledochoscope stone removal basket according to claim 1, characterized in that: The drainage tube section III (23) is a single-channel tube having a second single channel inside. The second single channel is connected to the four channels one (24). The connecting rod (12) is placed in the second single channel.

5. The choledochoscope stone removal basket according to claim 1, characterized in that: The handle (3) is a single-channel tube having a third single channel inside, the third single channel being connected to the second single channel, and the push rod is placed in the third single channel.

6. The choledochoscope stone removal basket according to claim 1, characterized in that: The head end of the handle (3) is provided with a connecting cap (32), and the outer sheath tube (2) is fixed to the handle (3) via the connecting cap (32).

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