A duodenoscopic bile and pancreatic calculus extractor

Abstract

The present invention discloses a duodenoscope-assisted gallbladder and pancreatic stone swallowing device, comprising an operating part and a stone removal part, the operating part comprising a handle, a guide sheath being slidably provided in the handle, the stone removal part comprising a first hose, a second hose being slidably provided in the first hose, a nickel-titanium metal bracket being provided on one side of the second hose, a front end shell being connected to one side of the handle, a rear end shell being connected to the other side of the handle, a first clip for connection being installed between the front end shell and the handle, and a second clip for connection being installed between the rear end shells; the present invention integrates the functions of gallbladder stone swallowing, lithotripsy and collection, and when using this device for stone removal operation, the operation is smooth and efficient, without the need for repeated operation, and the damage to the gallbladder mucosa is small. The application of this device reduces the steps and time of stone removal, thereby reducing the pain and harm to the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a duodenoscope-assisted gallbladder and pancreatic stone extractor. Background Art

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) is an interventional medical procedure that uses a duodenoscope, inserted orally into the lower duodenum, to access the bile duct and pancreatic ducts through the duodenal papilla for imaging and other diagnostic and therapeutic procedures. ERCP is primarily used to treat isolated common bile duct stones, while laparoscopic cholecystectomy is currently the primary method for gallbladder stones. The gallbladder is a pouch-like structure, unlike the bile duct. During duodenoscopy, traditional common bile duct stone removal devices are not suitable for gallbladder stone removal. This is because the bile duct is a long, narrow passageway, allowing stone removal devices to accurately locate and remove stones along its length. However, the gallbladder's interior is relatively spacious, and the transition from the bile duct to the gallbladder is equivalent to a transition from two-dimensional to three-dimensional space. Therefore, current bile duct stone removal devices struggle to accurately locate stones within the gallbladder, significantly reducing stone removal efficiency. This is particularly true for small, muddy stones, for which no effective stone removal device is currently available. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a duodenoscope-assisted gallbladder and pancreatic stone swallowing device, which solves the problem of difficulty in removing stones during duodenoscope-assisted gallbladder preservation and stone removal, as well as the difficulty in removing debris or muddy stones produced by lithotripsy.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a duodenoscope-assisted gallbladder and pancreatic stone extractor, comprising an operating part and a stone extracting part. The stone extracting part is installed at one end of the operating part. The operating part comprises a handle, in which a guide sheath is slidably provided. The stone extracting part comprises a first hose, in which a second hose is slidably provided. A nickel-titanium metal bracket is provided on one side of the second hose, and the guide sheath is connected to the second hose.

[0006] Furthermore, one side of the handle is connected to a front end shell, the other side of the handle is connected to a rear end shell, a first buckle for connection is installed between the front end shell and the handle, and a second buckle for connection is installed between the rear end shell and the handle.

[0007] Furthermore, the handle is provided with a pushing component for controlling the guide sheath, the pushing component is composed of a movable slider and a slide groove where the movable slider is located, and the guide sheath is fixedly matched with the movable slider.

[0008] Furthermore, the guide sheath is a hard tube.

[0009] Furthermore, a silicone hose is provided on the same side of the second hose and the nickel-titanium metal bracket, and a metal fixing ring for connection is provided between the silicone hose and the second hose.

[0010] Furthermore, the silicone hose wraps the nickel-titanium metal stent, and the silicone hose is used to control the contraction and expansion of the nickel-titanium metal stent.

[0011] Furthermore, the titanium metal stent is composed of a nickel-titanium metal monomer and a monomer connector.

[0012] Furthermore, a lithotripter is provided in the second hose.

[0013] Furthermore, a balloon dilator is provided in the second flexible tube, and the balloon dilator is composed of a balloon body, a developing ring, and a double-lumen catheter.

[0014] Furthermore, the outer layer of the nickel-titanium metal stent is provided with a layer of silicone film in addition to the silicone hose.

[0015] The beneficial effects of the present invention are as follows: The present invention integrates the functions of gallstone swallowing, lithotripsy, and collection, effectively improving the collection rate of stones larger than 5 mm. At the same time, the metal stent with a silicone film attached improves the removal rate of debris-like stones. This device can overcome the difficulties in collecting stones during duodenoscope-assisted gallbladder lithotripsy and the difficulty in removing debris or mud-like stones produced by lithotripsy. When using this device for stone removal, the operation is smooth and efficient, without the need for repeated operations, and with minimal damage to the gallbladder mucosa. The use of this device reduces the steps and time required for stone removal, thereby reducing the pain and harm to the patient.

[0016] During the process of swallowing stones, the nickel-titanium metal stent is used to contract and expand back and forth to act on the stones. The inner wall of the nickel-titanium metal stent is provided with grooves, which have a certain restraining effect on the stones during the process of swallowing stones, thereby achieving the purpose of swallowing stones.

[0017] This device is equipped with a lithotripsy channel, which can be used to crush stones using lithotripsy of the same specifications in different ways. When encountering larger stones, a balloon expander can be passed through the lithotripsy channel to further expand the nickel-titanium metal stent and then crush it.

[0018] This invention works in conjunction with a lithotripter, and its simple structure can adapt to use in different environments; it can also be used in conjunction with a stone removal basket. For stones that are difficult to operate, the stone removal basket can be used to control the stones first and then crush them. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the 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 only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a cross-sectional view of the operating portion of an embodiment of the present invention;

[0021] Figure 2 is a cross-sectional view of the stone removal structure of an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of the nickel-titanium metal stent 7 according to an embodiment of the present invention;

[0023] Figure 4 This is a diagram illustrating the expansion of the stone removal portion of an embodiment of the present invention;

[0024] Figure 5 This is a diagram illustrating the contraction of the stone removal portion of an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the composition structure of the nickel-titanium metal stent 7 according to an embodiment of the present invention;

[0026] Figure 7 is a schematic diagram of a balloon dilator 122 according to an embodiment of the present invention;

[0027] Figure 8 is a cross-sectional view of the structure of a balloon dilator 122 according to an embodiment of the present invention;

[0028] Figure 9 Schematic diagram of the cooperation between the nickel-titanium metal stent 7 and the balloon dilator 122 according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following combination Figure 1-9 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are the same as Figure 1 The up, down, left, right, front and back directions of the projection relationship itself are consistent.

[0030] Combined with attachment Figure 1-9The duodenoscope-assisted bile and pancreatic stone swallowing device includes an operating part and a stone removal part. The operating part includes a handle 1, in which a guide sheath 40 is slidably provided. The guide sheath 40 is a hard tube. One side of the handle 1 is connected to a front end shell 11, and the other side of the handle 1 is connected to a rear end shell 10. A first buckle 3 for connection is installed between the front end shell 11 and the handle 1, and a second buckle 30 for connection is installed between the rear end shell 10 and the handle 1.

[0031] The handle 1 is provided with a pushing component 20 for controlling the guide sheath 40. The pushing component 20 consists of a moving slider 2 and a slide groove where the moving slider 2 is located. The guide sheath 40 is fixedly matched with the moving slider 2, and the moving slider 2 is fixedly matched with the guide sheath 40.

[0032] The medical staff holds the handle 1 and controls the movable slider 2 to move the guide sheath 40. The guide sheath 40 in the handle 1 extends to both sides to the outside of the handle 1. The handle 1 fixes the internal parts. The shape is designed according to the hand shape and conforms to the principles of ergonomics.

[0033] The stone removal part includes a first hose 5 , in which a second hose 6 is slidably arranged. The first hose 5 is an external hose, and the second hose 6 is an internal hose that moves inside the first hose 5 .

[0034] The guide sheath 40 and the second hose 6 are hollow inside, and the guide sheath 40 and the second hose 6 are used to set a lithotripter 8. The lithotripter 8 extends into the nickel-titanium metal bracket 7 through the guide sheath 40 and the second hose 6.

[0035] The guide sheath 40 and the interior of the second flexible tube 6 can also be used to dispose a balloon dilator 122 .

[0036] Both the lithotripter 8 and the balloon dilator 122 can be inserted into the nickel-titanium metal stent 7 .

[0037] One side of the second hose 6 is fixedly connected to the guide sheath 40 , and the guide sheath 40 drives the second hose 6 to move left and right.

[0038] A silicone hose 61 is provided on the other side of the second hose 6 , and a metal fixing ring 60 for connection is provided between the silicone hose 61 and the second hose 6 .

[0039] The nickel-titanium metal stent 7 is wrapped in the silicone hose 61, and the silicone hose 61 is used to control the contraction and expansion of the nickel-titanium metal stent 7;

[0040] The nickel-titanium metal stent 7 can be contracted and expanded through the movement of the silicone hose 61. When expanding, large stones can be wrapped inside the silicone hose 61 and the nickel-titanium metal stent 7, so that the lithotripter 8 can process the stones. When expanding, the front end of the nickel-titanium metal stent 7 will be tilted outward to swallow larger stones; when contracting, the large stones wrapped inside the nickel-titanium metal stent 7 will be further wrapped, and the front end will be contracted inward to prevent the inner wall from being injured when the lithotripter 8 is working to crush the stones.

[0041] The nickel-titanium metal stent 7 is composed of a stent monomer 70 and a monomer connector 71. The stent monomer 70 is the main element constituting the nickel-titanium metal stent 7. Different usage effects of the nickel-titanium metal stent 7 are formed by different arrangements of the stent monomers 70. The monomer connector 71 connecting the stent monomers 70 is wavy, and its inner wall has a serrated groove, which is biased to one side. The main purpose is to firmly fix the swallowed stones in the nickel-titanium metal stent 7 so that the lithotripter can smoothly crush the stones. The second hose 6 drives the movement of the silicone hose 61 to achieve different degrees of contraction and expansion of the nickel-titanium metal stent 7.

[0042] The single connector 71 is inwardly wavy and concave, with tooth-like grooves on its inner wall. Its main function is to firmly lock the stone in the nickel-titanium metal stent 7 and prevent it from falling out during the stone removal process. In addition, the single connector 71 cooperates with the nickel-titanium metal single body to lock the stone, allowing the lithotripter 8 to crush the stone.

[0043] The nickel-titanium metal stent 7 is slowly opened by moving the slider 2 to facilitate the swallowing of stones. During the swallowing and contraction process, larger stones are crushed by the lithotripter, and the nickel-titanium metal stent 7 continues to shrink. As a result, the front end of the nickel-titanium metal stent 7 shrinks inward to prevent the crushed stones from entering the bile duct; the nickel-titanium metal stent 7 shrinks until it can pass through the first hose 5, at which time the stone swallowing is completed.

[0044] During the contraction process, the nickel-titanium metal stent 7 continuously squeezes the stones, and cooperates with the lithotripter to break up the larger stones, and then swallow them; the squeezing, stone crushing, swallowing and contraction actions are repeated until the stones are removed.

[0045] In addition to the silicone hose 61, the outer layer of the nickel-titanium stent 7 is also covered with a silicone film. The use of the lithotripter 8 generates mechanical forces that could damage the inner mucosa. Therefore, the silicone hose 61 is attached to the outside of the nickel-titanium stent 7 to prevent the leakage of small stones and sediment. To prevent accidental leaks in the silicone hose 61, a silicone film is added to the outer layer of the nickel-titanium stent 7, providing a double layer of protection to minimize damage to the inner mucosa. Both the silicone hose 61 and the silicone film prevent the leakage of small stones.

[0046] The balloon dilator 122 is composed of a balloon body 12 , a developing ring 120 , and a double-lumen catheter 121 .

[0047] In operation, the balloon can be inflated to expand. Different balloon sizes allow for different expansion degrees, supporting different sizes of the nickel-titanium stent 7. Different balloons 12 can be used to treat stones of varying sizes. A developing ring 120 secures the balloon 12, ensuring proper operation. A dual-lumen catheter 121 is used to inflate the balloon 12.

[0048] The balloon dilator 122 is mainly used in conjunction with the nickel-titanium metal stent 7 for expansion. The maximum diameter of the nickel-titanium metal stent 7 is 5 mm under normal conditions, so it can swallow 5 mm stones under normal conditions. The balloon dilator can assist the nickel-titanium metal stent 7 to swallow stones larger than 5 mm.

[0049] The balloon expander 122 extends the balloon into the interior of the nickel-titanium metal stent 7. As the balloon expander is inflated, the nickel-titanium metal stent 7 begins to expand, wrapping stones larger than 5 mm into the nickel-titanium metal stent 7, thereby achieving the next step of lithotripsy.

[0050] The nickel-titanium metal bracket 7 is in an open state under normal conditions, and the front end of the nickel-titanium metal bracket 7 is tilted upwards.

[0051] When the nickel-titanium metal stent 7 is in operation, the front end stent enters the catheter. As the inner wall of the catheter continuously squeezes the nickel-titanium metal stent 7 to deform, the metal stent unit and the connector undergo memory deformation to achieve swallowing action.

[0052] Since the nickel-titanium metal stent 7 has good expansion ability, when it is difficult to swallow larger stones under normal conditions, the nickel-titanium metal stent 7 can be expanded using a balloon expander. After the stone is wrapped, the balloon expander can be removed and then a lithotripter can be used to crush the stone.

[0053] The movable slider 2 of the handle part moves back and forth to allow the nickel-titanium metal stent 7 to enter the catheter, thereby controlling the contraction and expansion of the nickel-titanium metal stent 7.

[0054] The front end shell 11 and the rear end shell 10 are connected to the guide sheath 40 to form a channel. The channel is mainly used for the lithotripter 8, the balloon dilator 122 and the removal of stones.

[0055] Principle: Applying the bionic design principle, the swallowing device is designed to imitate the eating action of a bionic snake. During the swallowing process, the head keeps wriggling to swallow the stones into the abdominal cavity. For larger stones, lithotripsy is performed in the abdominal cavity.

[0056] Nickel-titanium alloy is a shape-memory alloy, a specialized alloy that can automatically return to its original shape at a specific temperature. This characteristic of nickel-titanium alloy is exploited to create a wavy-shaped swallower. At a certain temperature, its shape changes, allowing the catheter to apply pressure to the front nickel-titanium wire, thereby achieving the swallowing action.

[0057] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand and implement the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A duodenoscope-assisted gallbladder and pancreatic stone removal device, comprising an operating portion and a stone removal portion, characterized in that: The stone removal part is installed at one end of the operating part, the operating part includes a handle (1), a guide sheath (40) is slidably provided in the handle (1), the stone removal part includes a first hose (5), a second hose (6) is slidably provided in the first hose (5), a nickel-titanium metal bracket (7) is provided on one side of the second hose (6), and the guide sheath (40) is connected to the second hose (6); A silicone hose (61) is provided on the same side of the second hose (6) and the nickel-titanium metal bracket (7), and a metal fixing ring (60) for connection is provided between the silicone hose (61) and the second hose (6); The silicone hose (61) wraps the nickel-titanium metal stent (7), and the silicone hose (61) is used to control the contraction and expansion of the nickel-titanium metal stent (7); The nickel-titanium metal stent (7) is composed of a nickel-titanium metal monomer (70) and a monomer connector (71), wherein the monomer connector (71) is in an inward-contracted wave-shaped concave shape and has a tooth-shaped groove on the inner wall; The outer layer of the nickel-titanium metal stent (7) is provided with a layer of silicone film in addition to the silicone hose (61).

2. The duodenoscope-assisted gallbladder and pancreatic stone removal device according to claim 1, characterized in that: One side of the handle (1) is connected to a front housing (11), and the other side of the handle (1) is connected to a rear housing (10); a first buckle (3) for connection is installed between the front housing (11) and the handle (1), and a second buckle (30) for connection is installed between the rear housing (10) and the handle (1).

3. The duodenoscope-assisted gallbladder and pancreatic stone removal device according to claim 1, characterized in that: The handle (1) is provided with a pushing component (20) for controlling the guide sheath (40), and the pushing component (20) is composed of a movable slider (2) and a slide groove in which the movable slider (2) is located. The guide sheath (40) and the movable slider (2) are fixedly matched.

4. The duodenoscope-assisted gallbladder and pancreatic stone removal device according to claim 1, characterized in that: The guide sheath (40) is a hard tube.

5. The duodenoscope-assisted gallbladder and pancreatic stone removal device according to claim 1, characterized in that: A lithotripter (8) is provided in the second hose (6).

6. The duodenoscope-assisted gallbladder and pancreatic stone removal device according to claim 1, characterized in that: A balloon dilator is provided in the second flexible tube (6), and the balloon dilator is composed of a balloon body (12), a developing ring (120), and a double-lumen catheter (121).

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