Multifunctional stone basket

Abstract

The utility model provides a multifunctional calculus extraction net basket, including net basket cap, outer sheath, net basket, connecting pipe and handle, net basket cap sets up at the head end outside of outer sheath, net basket and connecting pipe are placed in the inside of outer sheath, the head end of net basket is connected with the tail end of net basket cap, and the tail end is connected with the head end of connecting pipe, connecting pipe is inserted to the inside of outer sheath through the tail end of outer sheath, and the tail end of connecting pipe is connected with handle, and handle is located at the tail end outside of outer sheath, the utility model has multiple functions, can be directly placed into to common bile duct and carries out calculus extraction, also can be placed into to common bile duct, intrahepatic bile duct and gallbladder duct under the guidance of guide wire and carries out positioning calculus extraction, when the huge calculus is taken out, can be placed into the guide wire and carries out lithotripsy through the guide wire channel, and then the broken stone is taken out.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a multifunctional stone retrieval basket. Background Technology

[0002] Bile duct stones are a common and frequently occurring disease in my country, including gallbladder stones, intrahepatic bile duct stones, and common bile duct stones. Obstruction of the cystic duct or bile duct by stones can induce complications such as acute cholecystitis, acute cholangitis, obstructive jaundice, and acute biliary pancreatitis, and may even lead to septic shock, endangering the patient's life. Long-term irritation from stones increases the risk of gallbladder cancer and bile duct cancer.

[0003] Endoscopic retrograde cholangiopancreatography (ERCP) is a minimally invasive and commonly used method for treating common bile duct stones using a duodenoscope. A stone retrieval basket is inserted into the common bile duct through the duodenoscope's forceps channel. After retrieving the stone, it is pulled back into the common bile duct through the duodenal papilla. Clinically, the following difficulties often arise during stone retrieval: 1. Large stones are difficult to remove through the duodenal papilla after being retrieved by the stone retrieval basket. The stone needs to be released first, followed by lithotripsy. Lithotripsy methods include mechanical lithotripsy and laser lithotripsy. A lithotripsy basket is used to retrieve the stone, and tightening the basket breaks the stone. However, the sheath of the lithotripsy basket is relatively rigid, making it difficult to insert into the common bile duct through the duodenal papilla, and even leading to serious complications such as duodenal papilla perforation. The latter method uses the SpyGlass or Insight pancreaticobiliary imaging system to enter the common bile duct, and then inserts a lithotripsy fiber optic or wire fragmentation device through the forceps channel. However, the pancreaticobiliary imaging system is expensive, limiting its clinical application. 2. Intrahepatic bile duct stones: Intrahepatic bile duct stones are generally treated with surgical procedures such as hepatectomy and choledochoscopy. ERCP can also be used to treat intrahepatic bile duct stones, but ordinary stone retrieval baskets are difficult to access the target bile duct. Generally, the guidewire is superselectively inserted into the bile duct where the stone is located, and then a guidewire-guided stone retrieval basket is placed under the guidewire guidance. Currently, the guidewire-guided stone retrieval baskets used clinically generally have the guidewire led out through the basket cap, and the guidewire does not pass through the outer sheath of the basket. The basket sheath is often at an angle to the guidewire, especially when the curvature of the intrahepatic bile duct is large. The basket sheath often slips into the contralateral bile duct, making it difficult to place into the large-curvature intrahepatic bile duct. SpyGlass or the Insight Pancreaticobiliary Imaging System is currently an effective method for treating intrahepatic bile duct stones, but its high price still limits its clinical application; 3. Difficult stone removal: (1) The stone retrieved by the basket is stuck in the sphincter of Oddi. This is one of the most dangerous situations in basket stone removal. At this time, the retrieved stone cannot be removed and is often difficult to push into the common bile duct to release the stone. Only surgical operation with the stone retrieval basket can be carried out. The stone is broken up under choledochoscopy and then the basket is removed; (2) The intrahepatic bile duct stone retrieved by the basket cannot pass through the narrow bile duct. This is a difficult situation in basket stone removal. One of the most dangerous situations in intrahepatic bile duct is that the stones retrieved cannot be removed through the narrow bile duct and there is often no space to release them. In most cases, the only option is to carry a stone retrieval basket for surgery, remove the liver where the stone is located, or use a choledochoscope to enter the bile duct to break the stone and finally remove the impacted basket. (3) The stone retrieved by the basket is impacted in the cystic duct. This is one of the most dangerous situations in basket stone retrieval. Forcibly pulling out the basket can easily damage the sphincter of the duodenal papilla or the cystic duct. If the basket cannot be pulled out, surgery is the only option. The cystic duct is cut open to break the stone and then the impacted basket is removed. Utility Model Content

[0004] To address the aforementioned technical problems, a multifunctional stone-collecting basket is provided.

[0005] The technical means adopted in this utility model are as follows:

[0006] A multifunctional stone-collecting basket includes: a basket cap, an outer sheath, a basket, a connecting tube, and a handle. The basket cap is located outside the head end of the outer sheath, and the basket and connecting tube are located inside the outer sheath. The head end of the basket is connected to the tail end of the basket cap, and the tail end is connected to the head end of the connecting tube. The connecting tube is inserted into the outer sheath through the tail end of the outer sheath, and the tail end of the connecting tube is connected to the handle. The handle is located outside the tail end of the outer sheath.

[0007] Furthermore, the basket cap is made of metal, and the head end of the basket cap has a conical structure, while the tail end has a cylindrical structure.

[0008] Furthermore, the basket is composed of multiple metal wires arranged in parallel, with one end of each wire connected to the tail end of the basket cap and the other end connected to the head end of the connecting pipe.

[0009] Furthermore, the metal wire is provided in four strands.

[0010] Furthermore, the multifunctional stone-collecting basket has a guide wire channel inside.

[0011] Furthermore, the guide wire channel includes a guide wire channel I inside the basket cap and a guide wire channel II inside the connecting tube. The guide wire channel II is used to insert a guide wire or a gravel wire. The guide wire is inserted sequentially into the guide wire channel II, between multiple metal wires, and into the guide wire channel I, and then passes through the guide wire channel I. The gravel wire is inserted between multiple metal wires through the guide wire channel II.

[0012] Furthermore, the outer sheath is a single-channel tube with a single channel inside, which is used to accommodate the basket and connecting tube.

[0013] Furthermore, the outer sheath is made of plastic.

[0014] Furthermore, the connecting pipe is made of metal.

[0015] This utility model also provides an application of a multifunctional stone retrieval basket, which is used for routine removal of common bile duct stones, stone retrieval under guidewire guidance, retrieval of stones embedded in the sphincter of Oddi, and treatment of stones embedded in the cystic duct or intrahepatic bile duct.

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

[0017] 1. The multifunctional stone retrieval basket provided by this utility model can be inserted into the common bile duct, intrahepatic bile duct and cystic duct under the guidance of a guidewire for stone retrieval in addition to conventional stone retrieval, thus having a wider range of indications.

[0018] 2. The multifunctional stone retrieval basket provided by this utility model has a guide wire led out through the basket cap and outer sheath, which makes it easy to insert the basket into the intrahepatic bile duct and cystic duct at a larger angle, resulting in a higher success rate of stone retrieval.

[0019] 3. The multifunctional stone retrieval basket provided by this utility model uses a connecting tube instead of a traditional connecting rod, which ensures the guide wire channel without increasing the outer diameter of the outer sheath tube of the basket.

[0020] 4. The multifunctional stone retrieval basket provided by this utility model can be used for the treatment of large stones. It can be used for laser lithotripsy by inserting lithotripsy fiber or wire through the guide wire channel, thus expanding its application scope.

[0021] 5. The multifunctional stone retrieval basket provided by this utility model can be used to remove stones if stone entrapment occurs during the stone retrieval process. The stone fragments can be removed by inserting a stone fragmentation fiber or wire through the guide wire channel and then removing the fragments. This not only reduces the incidence of complications in stone retrieval baskets, but also expands their application scope.

[0022] Based on the above reasons, this utility model can be widely promoted in fields such as medicine. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0026] Figure 3 This is a schematic diagram of the basket after it has been released.

[0027] Figure 4 This is a schematic diagram of the insertion of the guide wire according to this utility model.

[0028] Figure 5 This is a schematic diagram of how the basket of this utility model is released to retrieve the stones.

[0029] Figure 6 This is a schematic diagram of the present invention, showing the removal of stones and placement of stone-breaking wires after the basket is released.

[0030] Figure 7 This is a schematic diagram of the crushed stone conductor of this utility model after crushing stone.

[0031] In the picture: 1. Net basket cap; 2. Outer sheath tube; 3. Net basket; 4. Connecting tube; 5. Handle. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] Example 1

[0034] This utility model provides a multifunctional stone retrieval basket, including a basket cap 1, an outer sheath tube 2, a basket 3, a connecting tube 4, and a handle 5. The basket cap 1 is located outside the head end of the outer sheath tube 2, and the basket 3 and the connecting tube 4 are located inside the outer sheath tube 2. The head end of the basket 3 is connected to the tail end of the basket cap 1, and the tail end is connected to the head end of the connecting tube 4. The connecting tube 4 is inserted into the interior of the outer sheath tube 2 through the tail end of the outer sheath tube 2, and the tail end of the connecting tube 4 is connected to the handle 5, which is located outside the tail end of the outer sheath tube 2.

[0035] The net cap 1 is made of metal, with a tapered head and a cylindrical tail. The net cap 1 has a guide wire channel I inside.

[0036] The outer sheath tube 2 is a single-channel tube made of plastic, with a single channel inside for accommodating the basket 3 and the connecting tube 4.

[0037] The net basket 3 is composed of four metal wires arranged in parallel. The head end of the four metal wires is connected to the tail end of the net basket cap 1, and the tail end is connected to the head end of the connecting tube 4.

[0038] The connecting tube 4 is made of metal, with its tail end fixed to the handle 5, and has a guide wire channel II inside.

[0039] The multi-functional stone-collecting basket has an internal guide wire channel, which consists of guide wire channel I and guide wire channel II. Guide wire channel II is used to insert guide wires or stone-crushing wires. The guide wire is inserted sequentially into guide wire channel II, between multiple metal wires, and into guide wire channel I, and then exits through guide wire channel I. The stone-crushing wire is inserted between multiple metal wires via guide wire channel II.

[0040] This invention has multiple functions. It can be directly inserted into the common bile duct for stone removal, or it can be inserted into the common bile duct, intrahepatic bile duct, and cystic duct under the guidance of a guidewire for targeted stone removal. When large stones cannot be removed smoothly, a lithotripsy wire can be inserted through the guidewire channel to break up the stones before removing the fragments.

[0041] Example 2

[0042] Applications of this multifunctional stone-retrieving basket:

[0043] 1. Routine removal of common bile duct stones: A multi-functional stone retrieval basket is inserted through the duodenoscope channel and directly inserted into the common bile duct through the duodenal papilla. The basket is then released to retrieve the common bile duct stone, and finally the stone is pulled into the duodenal lumen through the common bile duct.

[0044] 2. Guidewire-guided stone removal: The incision knife with guidewire is used to select the intrahepatic bile duct or cystic duct. The guidewire is placed in the intrahepatic bile duct or cystic duct. Under the guidance of the guidewire, a multi-functional stone retrieval basket is placed. The basket is released to retrieve the stone, and then the stone is pulled into the duodenal lumen. After the multi-functional basket passes the stone, the guidewire is withdrawn, the basket is released to retrieve the stone, and then the stone is removed.

[0045] 3. Retrieving stones lodged in the sphincter of the duodenal papilla using a basket: If the stone is large, it may become lodged in the sphincter of the duodenal papilla during the stone retrieval process. A stone fragmentation wire is inserted through the guidewire channel to break up the stone, and then the fragments are removed.

[0046] 4. Treatment of impacted stones in the cystic duct or intrahepatic bile duct: A multi-functional basket is used to retrieve stones from the cystic duct or intrahepatic bile duct. Due to the presence of the Heister valve in the cystic duct and stenosis of the intrahepatic bile duct, the stones cannot be completely removed; only release is possible. If the stones cannot be released, open or laparoscopic surgery is required. In such cases, a lithotripsy lead is inserted through the guidewire channel of the multi-functional basket for laser or electrohydraulic lithotripsy, followed by stone removal.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multifunctional stone retrieval basket, characterized in that, include: The basket consists of a basket cap (1), an outer sheath (2), a basket (3), a connecting tube (4), and a handle (5). The basket cap (1) is located outside the head end of the outer sheath (2). The basket (3) and the connecting tube (4) are located inside the outer sheath (2). The head end of the basket (3) is connected to the tail end of the basket cap (1), and the tail end is connected to the head end of the connecting tube (4). The connecting tube (4) is inserted into the interior of the outer sheath (2) through the tail end of the outer sheath (2). The tail end of the connecting tube (4) is connected to the handle (5), and the handle (5) is located outside the tail end of the outer sheath (2).

2. The multifunction stone retrieval basket according to claim 1, wherein, The basket cap (1) is made of metal, and the head end of the basket cap (1) has a conical structure, while the tail end has a cylindrical structure.

3. The multifunction stone retrieval basket according to claim 1, wherein, The basket (3) is composed of multiple metal wires arranged in parallel. One end of each metal wire is connected to the tail end of the basket cap (1), and the other end is connected to the head end of the connecting pipe (4).

4. The multifunction stone retrieval basket of claim 3, wherein, The metal wire has four strands.

5. The multifunction stone retrieval basket according to claim 3, wherein, The multifunctional stone-collecting basket has a guide wire channel inside.

6. The multifunction stone retrieval basket of claim 5, wherein, The guide wire channel includes a guide wire channel I inside the basket cap (1) and a guide wire channel II inside the connecting tube (4). The guide wire channel II is used to insert a guide wire or a gravel wire. The guide wire is inserted into the guide wire channel II, between multiple metal wires, and into the guide wire channel I in sequence, and then passes out of the guide wire channel I. The gravel wire is inserted between multiple metal wires through the guide wire channel II.

7. The multifunction stone retrieval basket according to claim 1, wherein, The outer sheath tube (2) is a single-channel tube with a single channel inside, which is used to accommodate the basket (3) and the connecting tube (4).

8. The multifunction stone retrieval basket of claim 1, wherein, The outer sheath (2) is made of plastic.

9. The multifunction stone retrieval basket according to claim 1, wherein, The connecting pipe (4) is made of metal.

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