Guide wire calculus removal mesh basket and application thereof

Abstract

The invention provides a guide wire calculus removing mesh basket and application thereof. The guide wire calculus removing net basket comprises a net basket body, a guide wire, a net basket cap, an outer sheath tube and a handle, the tail end of the guide wire is connected with the head end of the net basket cap, the net basket cap is arranged outside the head end of the outer sheath tube, the net basket body is inserted into the outer sheath tube through the tail end of the outer sheath tube, one end of the net basket body is connected with the tail end of the net basket cap, and the other end of the net basket body is connected with the handle. The handle is located outside the tail end of the outer sheath tube. The device can be inserted through various instrument channels such as a nipple incision knife, SpyGlass or a pancreatic and biliary duct imaging system forceps channel, and multi-scene calculus removal treatment is achieved; in the process of releasing the mesh basket, the head end of the soft guide wire crosses the calculus and enters the bile duct at the far end more easily, release of the mesh basket is facilitated, and the calculus can be extracted by pulling back the mesh basket.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a guide wire stone removal basket and applications thereof. Background Art

[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. Stones blocking the cystic duct or bile duct can induce complications such as acute cholecystitis, acute cholangitis, obstructive jaundice, acute biliary pancreatitis, and even lead to life-threatening septic shock. Long-term stimulation from stones carries the risk of gallbladder and bile duct cancer.

[0003] Endoscopic retrograde cholangiopancreatography (ERCP) is a commonly used duodenoscope-assisted treatment for common bile duct and cystic duct stones. It has also been used to treat intrahepatic bile duct stones, but this procedure is more challenging. Because the intrahepatic bile duct resembles a tree, with more branches as it becomes more distal, accurately placing a stone removal basket into the bile duct where the stone is located can be challenging under fluoroscopy. With the advancement of endoscopic technology, the SpyGlass or Insight Biliary Pancreatography system has been introduced into clinical practice. This system allows access to the common bile duct and intrahepatic bile ducts, allowing for direct visualization and precise stone removal. The most common ERCP stone removal method involves inserting a stone removal basket catheter through the duodenal papilla into the common bile duct or cystic duct under fluoroscopy. The tip of the basket catheter is passed through the gap between the stone and the wall of the common bile duct or cystic duct into the bile duct above the stone. The basket is then opened and released, and the basket catheter is retracted to remove the stone, directly pulling the stone from the common bile duct or cystic duct into the duodenal lumen. The method of stone removal using SpyGlass or Insight Biliary Pancreatography is the same as that of ERCP, the only difference being that stones are found, retrieved, and removed under direct vision.

[0004] The basket used for ERCP lithotripsy is similar in structure to the basket used in the pancreatic biliary imaging system, but they are different models. The diameter of the ERCP lithotripsy basket is generally between 2-3mm, and the outer sheath is a plastic tube; the diameter of the basket used in the pancreatic biliary imaging system is generally less than 1mm, and the outer tube is a metal tube. Because the diameter of the ERCP lithotripsy basket sheath exceeds 2mm, the following situations often occur during clinical lithotripsy: 1. When the diameter of the common bile duct stone is slightly smaller than the diameter of the common bile duct or the common bile duct stone is impacted, the stone retrieval basket sheath has difficulty passing through the gap between the stone and the common bile duct wall, resulting in stone retrieval failure or pushing the stone into the distal intrahepatic bile duct, increasing the difficulty of stone retrieval; 2. The normal cystic duct diameter is 2-3mm, and the gap between the cystic duct stone and the inner wall of the cystic duct is narrower. The 2-3mm diameter stone retrieval basket also has difficulty passing through the gap between the stone and the cystic duct wall, resulting in stone retrieval failure. The basket of a pancreaticobiliary imaging system has a diameter of less than 1 mm, which theoretically makes it easier to pass through the gap between the stone and the cystic duct or bile duct wall, increasing the success rate of retrieval of common bile duct stones, cystic duct stones, and intrahepatic bile duct stones. In practice, pancreaticobiliary imaging systems can indeed accurately detect, extract, and retrieve stones. However, the external tube of a stone retrieval basket with a diameter less than 1 mm is a metal tube, which is much stronger than the plastic sheath of a stone retrieval basket with a diameter of 2-3 mm. This results in poor bending of the metal sheath basket. This stone retrieval basket cannot be directly inserted into the common bile duct through the duodenoscope channel and cannot be used for the treatment of common bile duct stones under conventional X-ray fluoroscopy. Stone retrieval baskets with a diameter less than 1 mm can only be inserted through the channel of a pancreaticobiliary imaging system. The basket sheath is inserted through the gap between the stone and the bile duct wall under direct visualization, and the basket is then released to extract the stone. However, the pancreaticobiliary imaging system cannot observe the image of the basket sheath after it passes through the gap between the stone and the bile duct wall. If the bile duct is curved behind the stone, the inserted basket cap can easily press against the bile duct wall, preventing the basket from being released and stone removal failure. Forcibly inserting the basket sheath or opening the basket can cause the basket sheath or cap to penetrate the bile duct wall and enter the liver parenchyma, leading to complications such as bleeding and bile leakage. Although a basket sheath with a diameter less than 1 mm can easily pass through the gap between the cystic duct stone and the cystic duct wall, the cystic duct is tortuous and has multiple Heister valves, making it difficult for the basket sheath and cap to enter the cystic duct distal to the stone, resulting in the basket being unable to open and thus unsuitable for the treatment of cystic duct stones. Summary of the Invention

[0005] In response to the technical problems raised above, a guide wire stone removal basket and its application are provided.

[0006] The technical means adopted in the present invention are as follows:

[0007] A guidewire stone removal basket comprises a basket and a guidewire, a basket cap, an outer sheath and a handle arranged in sequence from head to tail, wherein the tail end of the guidewire is connected to the head end of the basket cap, the basket cap is placed outside the head end of the outer sheath, the basket is inserted into the interior of the outer sheath through the tail end of the outer sheath, one end of the basket is connected to the tail end of the basket cap, and the other end is connected to the handle; the handle is located outside the tail end of the outer sheath.

[0008] Furthermore, the guide wire is a soft guide wire, which is composed of a first metal wire and a soft wrapping material, wherein the first metal wire is arranged inside, and the soft wrapping material is wrapped around the outside of the first metal wire.

[0009] Furthermore, the basket includes multiple second metal wires and connecting rods arranged in parallel, the connecting rods are inserted into the interior of the outer sheath through the tail end of the outer sheath, the head ends of the multiple second metal wires are connected to the basket cap, the tail ends are connected to the head ends of the connecting rods, and the tail ends of the connecting rods are connected to the handle.

[0010] Furthermore, there are four second metal wires.

[0011] Furthermore, a groove is provided inside the tail end of the basket cap, and the head ends of the plurality of second metal wires are connected to the groove.

[0012] Furthermore, the outer sheath tube is a single-channel tube made of metal, with a single channel provided inside, and the mesh basket is placed in the single channel.

[0013] Furthermore, the basket cap is made of metal.

[0014] The present invention also provides an application of a guidewire lithotomy basket, which is used to assist in bile duct intubation and papillary sphincterotomy with a sphincterotomy, remove common bile duct stones under X-ray fluoroscopy, remove gallbladder duct stones under X-ray fluoroscopy, remove intrahepatic bile duct stones under X-ray fluoroscopy, remove stones under direct vision of a pancreaticobiliary imaging system, remove common bile duct stones through a percutaneous transhepatic approach, remove bronchial foreign bodies under an ultrafine bronchoscope, remove ureteral or renal pelvis stones under an ultrafine ureteroscope, remove gallbladder stones under an ultrafine choledochoscope, remove thrombi through a venous or arterial puncture catheter under X-ray fluoroscopy, and remove bronchial foreign bodies under X-ray fluoroscopy.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention provides a guide wire lithotripsy basket and its application. A soft guide wire is added to the basket cap. The lithotripsy basket can enter the intrahepatic bile duct, cystic duct, and even the pancreatic duct to remove stones, thereby increasing its indications.

[0017] 2. The present invention provides a guide wire lithotripsy basket and its application. A soft guide wire is added to the basket cap. The lithotripsy basket can not only be used for lithotripsy under direct vision of a pancreaticobiliary imaging system, but can also be inserted into the common bile duct through the channel of an instrument such as a papillary sphincterotomy knife, or can be placed percutaneously into the common bile duct through a hepatobiliary fistula to remove the stone under X-ray fluoroscopy, thereby increasing its operation method.

[0018] 3. The guidewire stone removal basket provided by the present invention and its application add a section of soft guidewire to the basket cap. After the basket passes through the gap between the stone and the tube wall, it is easier to enter the distal bile duct, reducing the secondary damage during the basket placement process.

[0019] 4. The present invention provides a guide wire stone removal basket and its application. A soft guide wire is added to the basket cap. After the basket passes through the gap between the stone and the tube wall, during the release of the basket, the basket cap and the guide wire at the head end of the basket can more easily enter the far twisted or angled bile duct. The completely released basket can more easily remove stones, thereby increasing the success rate of stone removal by the basket.

[0020] 5. The guide wire lithotripsy basket and its application provided by the present invention has a section of soft guide wire added to the basket cap, which has some functions of the guide wire, such as cannulation of the nipple sphincterotomy knife with the lithotripsy basket, and nipple sphincterotomy after successful cannulation.

[0021] Based on the above reasons, the present invention can be widely promoted in fields such as medical treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0025] Figure 3 Schematic diagram of the basket after being released.

[0026] In the figure: 1. guide wire; 2. basket cap; 3. outer sheath; 4. handle; 51. second metal wire; 52. connecting rod. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. 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.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0031] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0034] Example 1

[0035] The present invention provides a guidewire stone removal basket, comprising a guidewire 1, a basket cap 2, an outer sheath 3, a basket, and a handle 4. The guidewire 1, basket cap 2, outer sheath 3, and handle 4 are arranged sequentially from head to tail, with the tail end of the guidewire 1 connected to the head end of the basket cap 2, the basket cap 2 being positioned outside the head end of the outer sheath 3, the basket cap 2 being positioned between the guidewire 1 and the outer sheath 3, the basket being inserted into the interior of the outer sheath 3 through the tail end of the outer sheath 3, one end of the basket being connected to the tail end of the basket cap 2, and the other end being connected to the handle 4; the handle 4 being positioned outside the tail end of the outer sheath 3.

[0036] The guide wire 1 is a soft guide wire, which is composed of a first metal wire and a soft wrapping material, and is connected to a metal basket cap 2, wherein the first metal wire is arranged inside and the soft wrapping material is wrapped around the outside of the first metal wire. The outer sheath 3 is a single-channel tube made of metal, with a single channel inside, and a basket passing through the single channel. The basket is composed of four second metal wires 51 and a connecting rod 52 arranged in parallel, and the connecting rod 52 is inserted into the interior of the outer sheath 3 through the tail end of the outer sheath 3. The head ends of the four second metal wires 51 are connected to the basket cap 2, and the tail ends are connected to the head end of the connecting rod 52, and the tail end of the connecting rod 52 is connected to the handle 4. There is a groove in the basket cap 2, and the head ends of the four second metal wires 51 are connected to the groove.

[0037] The appearance of the present invention is similar to a zebra guidewire and can be inserted through various instrument channels such as the papillary cutter, SpyGlass or the Insight Pancreaticobiliary Imaging System forceps channel to achieve stone removal treatment in multiple scenarios; during the basket release process, the soft guidewire tip passes over the stone and enters the distal bile duct more easily, which is more conducive to the release of the basket. The stone can be removed by pulling back the basket.

[0038] Example 2

[0039] Application of the guide wire stone removal basket of the present invention:

[0040] 1. Assisted papillary sphincterotomy for bile duct cannulation and papillary sphincterotomy: Insert the papillary sphincterotomy through the duodenoscope's forceps channel. A guidewire lithotomy basket is placed through the papillary sphincterotomy channel. The placement, axis, and curvature of the papillary sphincterotomy and the duodenal papilla are adjusted. The guidewire lithotomy basket is then inserted, allowing the basket to pass through the papillary sphincter and into the common bile duct. Connect the papillary sphincterotomy to a high-frequency generator, adjust the direction and curvature of the sphincterotomy wire, and gradually incise the papillary sphincter.

[0041] 2. Removal of common bile duct stones under X-ray fluoroscopy: After successful common bile duct cannulation with a sphincterotomy tool and a guide wire, a guide wire stone removal basket is inserted through the sphincterotomy tool channel. The basket passes over the gap between the common bile duct stone and the common bile duct wall and enters the bile duct above the stone. The basket is opened, pulled back, and the stone is removed, and the stone is dragged through the common bile duct into the duodenal cavity.

[0042] 3. Removal of cystic duct stones under X-ray fluoroscopy: After successful cannulation of the common bile duct and cystic duct using a sphincterotomy with a guide wire, a guide wire stone removal basket is inserted through the sphincterotomy channel. The basket passes through the gap between the stone and the cystic duct wall and enters the cystic duct or gallbladder distal to the stone. The basket is opened, pulled back, and the stone is removed, and the stone is dragged into the duodenal cavity through the cystic duct.

[0043] 4. Removal of intrahepatic bile duct stones under X-ray fluoroscopy: After successful common bile duct removal with a sphincterotomy tool and a guide wire, the guide wire is superselectively inserted into the bile duct where the intrahepatic stone is located. A guide wire stone removal basket is inserted through the sphincterotomy tool channel. The basket passes through the gap between the stone and the bile duct wall and enters the bile duct distal to the stone. The basket is opened, pulled back, and the stone is removed, and the stone is dragged into the duodenal cavity through the intrahepatic bile duct.

[0044] 5. Stone removal under direct vision using a pancreaticobiliary imaging system: The pancreaticobiliary imaging system is placed into the common bile duct / intrahepatic bile duct / cystic duct to locate common bile duct stones / intrahepatic bile duct stones / cystic duct stones. The pancreaticobiliary imaging system is fixed and a guidewire stone removal basket is inserted through its forceps channel. The basket passes through the gap between the stone and the duct wall and enters the lumen distal to the stone. The basket is opened, pulled back, and the stone is removed. The stone and the pancreaticobiliary imaging system are then dragged into the duodenal cavity.

[0045] 6. Percutaneous transhepatic approach to remove common bile duct stones: After inserting a guide wire stone retrieval basket through the percutaneous transhepatic bile duct puncture drainage tube or removing the percutaneous transhepatic bile duct puncture drainage tube, directly insert the guide wire stone retrieval basket through the fistula tract. Under the guidance of the soft guide wire, the guide wire basket enters the common bile duct through the fistula tract and passes over the stone. The basket is released and the stone is collected, and the stone is removed from the fistula tract.

[0046] 7. Applications in other scenarios: Removal of bronchial foreign bodies under ultra-fine bronchoscope, removal of ureteral or renal pelvis stones under ultra-fine ureteroscope, removal of gallbladder stones under ultra-fine choledochoscope; removal of thrombus through venous or arterial puncture catheter under X-ray fluoroscopy, removal of bronchial foreign bodies under X-ray fluoroscopy, etc.

[0047] 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 cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guide wire stone removal basket, characterized in that: The invention comprises a mesh basket and a guide wire (1), a mesh basket cap (2), an outer sheath (3) and a handle (4) arranged in sequence from the beginning to the end. The tail end of the guide wire (1) is connected to the head end of the mesh basket cap (2). The mesh basket cap (2) is placed outside the head end of the outer sheath (3). The mesh basket is inserted into the interior of the outer sheath (3) through the tail end of the outer sheath (3). One end of the mesh basket is connected to the tail end of the mesh basket cap (2), and the other end is connected to the handle (4); the handle (4) is located outside the tail end of the outer sheath (3).

2. The guide wire stone removal basket according to claim 1, characterized in that: The guide wire (1) is a soft guide wire, consisting of a first metal wire and a soft wrapping material, wherein the first metal wire is arranged inside, and the soft wrapping material is wrapped around the outside of the first metal wire.

3. The guide wire stone removal basket according to claim 1, characterized in that: The basket comprises a plurality of second metal wires (51) and a connecting rod (52) arranged in parallel, wherein the connecting rod (52) is inserted into the interior of the outer sheath tube (3) through the tail end of the outer sheath tube (3), the head ends of the plurality of second metal wires (51) are connected to the basket cap (2), and the tail ends are connected to the head ends of the connecting rod (52), and the tail ends of the connecting rod (52) are connected to the handle (4).

4. The guide wire stone removal basket according to claim 3, characterized in that: Four second metal wires (51) are provided.

5. The guide wire stone removal basket according to claim 3, characterized in that: A groove is provided inside the tail end of the basket cap (2), and the head ends of the plurality of second metal wires (51) are connected to the groove.

6. The guide wire stone removal basket according to claim 1, characterized in that: The outer sheath tube (3) is a single-channel tube made of metal, with a single channel provided inside, and the mesh basket is placed in the single channel.

7. The guide wire stone removal basket according to claim 1, characterized in that: The basket cap (2) is made of metal.

8. An application of the guide wire stone removal basket according to any one of claims 1 to 7, characterized in that: The guide wire lithotomy basket is used to assist in bile duct cannulation and papillary sphincterotomy with a sphincterotomy, remove common bile duct stones under X-ray fluoroscopy, remove gallbladder duct stones under X-ray fluoroscopy, remove intrahepatic bile duct stones under X-ray fluoroscopy, remove stones under direct vision of the pancreaticobiliary imaging system, remove common bile duct stones through a percutaneous transhepatic approach, remove bronchial foreign bodies under an ultrafine bronchoscope, remove ureteral or renal pelvic stones under an ultrafine ureteroscope, remove gallbladder stones under an ultrafine choledochoscope, remove thrombi through a venous or arterial puncture catheter under X-ray fluoroscopy, and remove bronchial foreign bodies under X-ray fluoroscopy.

Images