Negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery

Abstract

This invention relates to the field of medical device manufacturing technology and discloses a negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery. The device includes a stone-removing forceps body, which can be functionally divided into a handle section, a parallel section, and a curved rod section from tail to tip. A diverter is installed inside the parallel section, which is configured to connect to the negative pressure pump tubing and the saline tubing respectively, and to input gas / liquid into the curved rod section. A closing mechanism is provided at the tail end of the curved rod section. A crank is movably mounted on the parallel section, which is configured to switch the gas / liquid output of the diverter and simultaneously drive the closing mechanism to open and close the tail end of the curved rod section. The negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery provided by this invention reduces the difficulty of surgical operations, enhances continuity, shortens the required surgical time, reduces the workload of physicians to a certain extent, and avoids damage to gallbladder tissue during surgery.

Description

Technical Field

[0001] This invention relates to the field of medical device manufacturing technology, specifically to a negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery. Background Technology

[0002] Gallstones are one of the most common diseases in biliary surgery, with common symptoms including biliary colic, upper abdominal pain, and gallbladder effusion. With an aging population, changes in dietary structure, and the promotion of intravenous nutrition, the incidence of gallstones is increasing year by year. Epidemiological surveys show that the incidence rate in developed Western countries is 10%-15%, while in my country it is 4.42%-8.20%, and has been gradually increasing in recent years.

[0003] For a long time, due to an incomplete understanding of gallbladder function, it was believed that the gallbladder, apart from its functions of concentrating and contracting, was merely a bile storage organ. For patients with symptomatic and complication-related gallstones, cholecystectomy was considered the "gold standard" of treatment and was highly regarded. In recent years, with continuous technological advancements and a deeper understanding of gallbladder function, it has been discovered that the gallbladder is an indispensable and replaceable important digestive organ, playing a role in concentrating, contracting, and expelling bile, participating in digestion, and regulating and buffering bile duct pressure. Furthermore, the gallbladder mucosa can secrete IgA antibodies, which play a vital role in the immune defense function of the biliary and intestinal systems. As awareness of the importance of gallbladder function and the numerous adverse effects and complications of gallbladder removal has increased, preserving gallbladder function has gained increasing acceptance. This has led to the development of minimally invasive surgery, negative pressure suction stone removal, for patients with gallstones, to preserve the gallbladder during stone removal.

[0004] The working principle of negative pressure suction gallstone removal mainly consists of a one-way negative pressure balloon, a suction tube, and a drain tube. The suction tube can be inserted into the gallbladder in parallel with the cholangioscope to locate and remove stones under direct vision. Water is introduced through the cholangioscope's water inlet channel to keep the gallbladder full, which is beneficial for observation. The negative pressure is manually controlled, making operation convenient and easy to adjust. Under direct vision, the balloon is aimed at the stone. Due to the presence of a one-way valve, squeezing the balloon to create negative pressure will not impact the stone and cause it to shift, achieving accurate positioning. Releasing the negative pressure to remove the stone eliminates the need for repeated insertion and removal of the cholangioscope, saving time. The clinical application of this technique makes the thorough removal of small and sand-like stones in the gallbladder convenient and easy, achieving the goal of complete stone removal and further reducing stone recurrence. This treatment method mainly uses the flushing power of water to carry away the stones. Because the liquid needs to enter the gallbladder for flushing, it will inevitably cause the gallbladder to expand, thus damaging the gallbladder tissue. Summary of the Invention

[0005] Technical problems to be solved

[0006] The present invention provides a negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery, which aims to solve the problems of high complexity of operation and damage to gallbladder tissue during the operation when changing the original negative pressure suction stone removal.

[0007] Technical solution

[0008] To address the aforementioned technical problems in the existing technology, a negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery is provided, comprising a stone-removing forceps body. The stone-removing forceps body can be functionally divided into a handle section, a parallel section, and a crank section from tail to top. A diverter is installed inside the parallel section, which is configured to connect to the negative pressure pump tubing and the saline tubing respectively, and to input gas / liquid into the crank section. A closing mechanism is provided at the tail end of the crank section. A crank is movably mounted on the parallel section, which is configured to switch the gas / liquid output of the diverter and simultaneously drive the closing mechanism to open and close the tail end of the crank section.

[0009] Preferably, the diverter includes a first tube body I and a second tube body II. A curved block is movably provided on the diverter. The curved block is assembled to drive piston blocks respectively provided in the first tube body I and the second tube body II to move along the pipe diameter direction. When the piston blocks cause the first tube body I to be in a closed state, the second tube body II is in an open state.

[0010] Preferably, the diverter further includes a base plate, and the first tube I and the second tube II are both installed on the outer wall of one side of the base plate. A core rod is provided at the center of the outer wall of the base plate opposite to the first tube I and the second tube II. The center of the curved block is rotatably connected to the top of the core rod. One end of each of the two piston blocks is respectively equipped with a connecting handle protruding to the outside of the base plate. The two connecting handles are symmetrically rotatably connected to the left and right ends of the curved block relative to one end of the piston block.

[0011] Preferably, the parallel part has a placement cavity that extends through the top and bottom ends respectively. The diverter is inserted into the port of one end of the placement cavity. A guide is inserted into the end of the placement cavity opposite to the diverter. The guide is assembled to connect with the pipe inside the handle part. The tube at the tail end of the guide is fixedly connected to the outer wall of the first tube I opposite to the base plate.

[0012] The outer wall of the parallel section is provided with a connecting pipe that communicates with the saline tube body. The connecting pipe is fixedly connected to the outer wall of the second tube body II at one end opposite to the base plate.

[0013] Preferably, the top end of the crank section is fixedly installed in the placement cavity, and a double-pass pipe is provided inside one end of the parallel section, with the input end of the double-pass pipe connected to the first pipe body I and the second pipe body II respectively.

[0014] Preferably, the placement cavity is provided with a drive gear set, which is assembled to drive the crank block to swing, causing the two piston blocks to move and driving the closing mechanism to operate.

[0015] Preferably, the drive gear set includes a main gear, a shaft disk I, and a shaft disk II; a track gear is provided at the center of the shaft on both sides of the main gear; a driven gear that meshes with the track gear is provided at the center of the outer wall of the adjacent side of the shaft disk I and the shaft disk II; the main gear, the shaft disk I, and the shaft disk II are respectively movably disposed inside the placement cavity.

[0016] Preferably, the tail end of the crank is rotatably connected to a notch on one side of the outer wall of the parallel part, and one end located in the notch is an irregularly shaped gear in the shape of an arc, which meshes with the main gear.

[0017] Preferably, a first connecting line is wound inside the shaft disk I, and the tail end of the first connecting line is fixed to the protrusion at the center of the outer wall of the curved block on the side opposite to the core rod; a second connecting line is wound inside the shaft disk I, and the second connecting line cooperates with the sealing mechanism along the dark cavity opened in the parallel part and the curved rod part.

[0018] Preferably, the closing mechanism includes a closing cover and a shaft. The closing cover is rotatably connected to the tail end of the crank section via the shaft, and a torque spring is provided on the shaft. The torque spring is configured to drive the closing cover to maintain a maximum opening angle of 90° with the tail end of the crank section.

[0019] Compared with the prior art, the negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery provided by the embodiments of the present invention utilizes airflow suction. With the assistance of a choledochoscope, it approaches the stone site and uses airflow to suction the stone into the curved rod section. Then, a sealed space is formed by sealing the curved rod section, and physiological saline is injected into the sealed curved rod section to flush away the stone. This avoids damage to the gallbladder tissue during the operation, simplifies the operation, reduces the complexity of the operation, further reduces the surgical incision required, further reduces the wound healing time, and shortens the patient's recovery period.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0021] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the split-drive gear set structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the flow divider drive structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the flow divider drive structure of the present invention;

[0026] Figure 5 This is a partially enlarged schematic diagram of the parallel connection section and crank of the present invention;

[0027] Figure 6 This is a partially enlarged structural diagram of the location of the drainage component of the present invention;

[0028] Figure 7 This is a partially enlarged structural diagram of the location of the drive gear set of the present invention;

[0029] Figure 8 This is a schematic diagram of the closed mechanism structure of the present invention.

[0030] In the diagram: 1. Stone tongs body; 2. Handle; 3. Parallel connection; 31. Placement cavity; 32. Drainage component; 33. Connecting pipe; 34. Elastic component; 4. Crank rod; 41. Double-pass pipe; 5. Diverter; 51. First pipe body I; 52. Second pipe body II; 53. Base plate; 54. Core rod; 55. Connecting handle; 56. Elastic component; 57. Limiting plate; 6. Sealing mechanism; 61. Sealing cover; 62. Shaft body; 63. Torque spring; 7. Crank; 8. Crank block; 9. Piston block; 100. Drive gear set; 101. Main gear; 102. Shaft disc I; 1021. First connecting line; 103. Shaft disc II; 1031. Second connecting line; 104. Track gear disc; 105. Driven gear. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0033] like Figures 1 to 8 As shown, the present invention provides a negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery, which adopts the appearance design of conventional stone forceps and improves upon it. Figure 1 It can be seen that the main body 1 of the lithotripsy forceps can be divided into a handle section 2, a parallel section 3, and a crank section 4 from the tail end to the top end according to their functions. The air pipe of the negative pressure machine on the handle section 2 is connected, while the drainage component 32 on the parallel section 3 is connected to the saline supply equipment. Figure 4 It is known that the parallel section 3 is internally equipped with a diverter 5, which is connected to the negative pressure tube and the saline tube respectively, and inputs gas / liquid into the crank section 4. The tail end of the crank section 4 is equipped with a sealing mechanism 6. A crank 7 is movably mounted on the parallel section 3. The crank 7 is equipped to switch the gas / liquid output of the diverter 5 and simultaneously drive the sealing mechanism 6 to open and close the tail end of the crank section 4. Using airflow suction, with the assistance of a cholangioscope, the approaching stone site is addressed. The stone is sucked into the crank section 4 by airflow, and then the crank section 4 is sealed while saline is injected into the sealed crank section 4 to flush away the stone. This avoids damage to the gallbladder tissue during the operation. Compared with the traditional negative pressure surgery method consisting of a one-way negative pressure balloon, suction tube and drain tube, the suction tube can be combined with a cholangioscope to reduce the size of the incision during the operation, further reduce the wound healing time, and shorten the patient's recovery period.

[0034] As a further technical solution provided by the present invention, according to Figure 3 and Figure 4 It is known that the flow divider 5 includes a first tube body I51 and a second tube body II52. A curved block 8 is movably mounted on the flow divider 5. The curved block 8 is assembled to drive the piston blocks 9, which are respectively installed in the first tube body I51 and the second tube body II52, to move along the pipe diameter direction. That is, when the piston block 9 closes the first tube body I51, it opens the second tube body II52. This allows for the free switching between gas and liquid.

[0035] Furthermore, the first tube I51 and the second tube II52 are both installed on the outer wall of one side of the base plate 53. The base plate 53 has a core rod 54 at the center of the outer wall of the first tube I51 and the second tube II52. The center of the curved block 8 is rotatably connected to the top of the core rod 54. One end of each of the two piston blocks 9 is equipped with a connecting handle 55 that protrudes to the outside of the base plate 53. The two connecting handles 55 are symmetrically rotatably connected to the left and right ends of the curved block 8 relative to one end of the piston block 9.

[0036] Meanwhile, the parallel section 3 has placement cavities 31 that pass through the top and bottom ends respectively. The diverter 5 is inserted into the port of one end of the placement cavity 31. A drainer 32 is inserted into the end of the placement cavity 31 opposite to the diverter 5. The drainer 32 is assembled to connect with the pipe inside the handle section 2. The tube body at the tail end of the drainer 32 is fixedly connected to the outer wall of the first tube body I51 opposite to the base plate 53. The outer wall of the parallel section 3 is provided with a connecting pipe 33 that connects to the saline tube body. The connecting pipe 33 is fixedly connected to the outer wall of the second tube body II52 opposite to the base plate 53.

[0037] In the specific implementation process, according to Figure 4 It can be seen that, since the second tube body II52 is provided with an elastic element 56 and a limiting plate 57, and the limiting plate 57 is installed on the connecting handle 55 inside the second tube body II52, when the crank 7 moves to the handle part 2, the drive gear set 100 is driven by force. First, the shaft disk I102 is rotated by force to wind the first connecting line 1021 into the interior, thereby pulling the crank block 8 to deflect ( Figure 4 (as shown in the diagram), that is, when the piston block 9 opens the first tube I51, it closes the second tube II52, which is the saline flushing stage.

[0038] In the specific implementation process, according to Figure 4 It is known that the top end of the crank section 4 is fixedly installed in the placement cavity 31, and a double-pass pipe 41 is provided inside one end opposite to the parallel section 3. The input end of the double-pass pipe 41 is connected to the first pipe body I51 and the second pipe body II52 respectively. This allows the gas or liquid input from the first pipe body I51 and the second pipe body II52 to be incorporated into the crank section 4.

[0039] Furthermore, according to Figure 2 , Figure 4 as well as Figure 7 It is known that a drive gear set 100 is provided in the placement cavity 31. The drive gear set 100 is assembled to drive the crank block 8 to swing, causing the two piston blocks 9 to move and drive the closing mechanism 6 to operate.

[0040] The drive gear set 100 includes a main gear 101, a shaft disk I 102, and a shaft disk II 103.

[0041] according to Figure 7 It can be seen that the main gear 101 has a track gear 104 at the center of the shaft on both sides, and the driven gear 105 that meshes with the track gear 104 is respectively provided at the center of the outer wall of the adjacent side of the shaft disk I102 and shaft disk II103. The main gear 101, shaft disk I102 and shaft disk II103 are respectively movably arranged inside the placement cavity 31.

[0042] Meanwhile, the tail end of the crank 7 is rotatably connected to a notch on one side of the outer wall of the parallel part 3, and one end located in the notch is an irregularly shaped gear in the shape of an arc, which meshes with the main gear 101.

[0043] In the specific implementation process, since the first connecting wire 1021 is wound inside the shaft disk I102, and the tail end of the first connecting wire 1021 is fixed to the protrusion at the center of the outer wall of the crank block 8 on the side opposite to the core rod 54, and the second connecting wire 1031 is wound inside the shaft disk I103, the second connecting wire 1031 cooperates with the sealing mechanism 6 along the dark cavity opened in the parallel part 3 and the crank part 4. Therefore, when the crank 7 moves towards the handle part 2, the drive gear set 100 is driven by force. First, the shaft disk I102 is rotated by force, which winds the first connecting wire 1021 into the inside, thereby pulling the crank block 8 to deflect ( Figure 4 (as shown in the diagram) At the same time, the shaft disk II103 rotates under force to wind up the second connecting line 1031, thereby causing the sealing mechanism 6 to seal the curved rod part 4. When the first tube body I51 is in the open state, the second tube body II52 is in the closed state, and physiological saline is injected from the first tube body I51 into the curved rod part 4 to rinse the stones.

[0044] It should be noted that this invention requires at least two water pipes to achieve saline flushing: an inlet pipe and a drain pipe. The inlet pipe has a concealed groove along the parallel section 3 and the curved rod section 4 to supply water to the tail end of the curved rod section 4. Figure 1 Based on the reference, one end of the curved rod portion 4 relative to the parallel portion 3 is a tail single. The drainage component 32 is connected to a water pumping pipe. The device used in this invention to provide physiological saline is a well-known technical means in the art, and therefore does not need to be described in detail in this invention.

[0045] Furthermore, according to Figure 8It is known that the sealing mechanism 6 includes a sealing cover 61 and a shaft 62. The sealing cover 61 is rotatably connected to the tail end of the crank 4 via the shaft 62, and a torque spring 63 is provided on the shaft 62. The torque spring 63 is assembled to drive the sealing cover 61 to maintain a maximum opening degree of 90° with the tail end of the crank 4. When the crank 7 is released, the piston block 9 is reset under the action of the elastic elements, so that when the first tube I51 is in the closed state, the second tube II52 is in the open state, and the sealing cover 61 is in the open state. At this time, the device can once again use the airflow suction to draw out the stones.

[0046] It should be noted that when performing aspiration of the stones into the curved section 4, the stones need to be located beforehand using a cholangioscope, and then the number of stones in the extracted saline solution is observed. This enhances the continuity of the surgical procedure, shortens the time required for the operation, and reduces the workload of the physician to some extent.

[0047] In addition, according to Figure 4 and Figure 5 It is known that a return spring 34 is provided between the parallel part 3 and the crank 7. The function of the return spring 34 is to enable the crank 7 to automatically return when it loses grip, thereby driving the drive gear set 100 to feed and release the connecting wire.

[0048] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery, comprising a stone removal forceps body (1), characterized in that, The main body (1) of the stone tongs can be divided into a handle part (2), a parallel part (3) and a curved rod part (4) from the tail end to the top end according to function. The parallel part (3) is equipped with a diverter (5). The diverter (5) is assembled to connect with the negative pressure machine tube and the saline tube respectively, and to input gas / liquid into the curved rod part (4) respectively. The tail end of the crank section (4) is provided with a sealing mechanism (6), and a crank (7) is movably provided on the parallel section (3). The crank (7) is assembled to switch the gas / liquid output of the flow divider (5) and simultaneously drive the sealing mechanism (6) to open and close the tail end of the crank section (4). The parallel part (3) has a placement cavity (31) that passes through the top and bottom respectively. The diverter (5) is inserted into the port of one end of the placement cavity (31). A guide (32) is inserted into one end of the placement cavity (31) relative to the diverter (5). The guide (32) is assembled to connect with the pipe inside the handle part (2). The tube at the tail end of the guide (32) is fixedly connected to the outer wall of the first tube I (51) relative to the base plate (53). The outer wall of the parallel part (3) is provided with a connecting pipe (33) that communicates with the saline tube body. The connecting pipe (33) is fixedly connected to the outer wall of the second tube body II (52) at one end relative to the base plate (53). The placement cavity (31) is provided with a split drive gear set (100), which is assembled to drive the crank block (8) to swing, causing the two piston blocks (9) to move and drive the closing mechanism (6) to operate. The drive gear set (100) includes a main gear (101), a shaft disk I (102) and a shaft disk II (103). The main gear (101) has a track gear disk (104) at the center of the shaft on both sides. The outer wall of the adjacent side of the shaft disk I (102) and the shaft disk II (103) are respectively provided with driven gears (105) that mesh with the track gear disk (104). The main gear (101), the shaft disk I (102) and the shaft disk II (103) are respectively movably disposed inside the placement cavity (31); The shaft disk I (102) is wound with a first connecting line (1021), and the tail end of the first connecting line (1021) is fixed to the protrusion at the center of the outer wall of the curved block (8) on the side opposite to the core rod (54); The shaft disk II (103) is wound with a second connecting line (1031), and the second connecting line (1031) cooperates with the sealing mechanism (6) through the dark cavity opened along the parallel part (3) and the crank part (4).

2. The negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery according to claim 1, characterized in that: The diverter (5) includes a first tube I (51) and a second tube II (52). A curved block (8) is movably provided on the diverter (5). The curved block (8) is assembled to drive the piston blocks (9) respectively provided in the first tube I (51) and the second tube II (52) to move along the pipe diameter direction. When the piston block (9) makes the first tube I (51) closed, the second tube II (52) is open.

3. The negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery according to claim 2, characterized in that: The diverter (5) also includes a base plate (53), and the first tube I (51) and the second tube II (52) are both installed on the outer wall of one side of the base plate (53). The base plate (53) has a core rod (54) at the center of the outer wall of the first tube I (51) and the second tube II (52), and the center of the curved block (8) is rotatably connected to the top of the core rod (54). One end of each of the two piston blocks (9) is respectively equipped with a connecting handle (55) protruding to the outside of the base plate (53), and the two connecting handles (55) are symmetrically rotated relative to one end of the piston block (9) and connected to the left and right ends of the curved block (8).

4. The negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery according to claim 1, characterized in that: The top end of the crank section (4) is fixedly installed in the placement cavity (31), and a double-pass pipe (41) is provided inside one end of the parallel section (3). The input end of the double-pass pipe (41) is connected to the first pipe body I (51) and the second pipe body II (52) respectively.

5. The negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery according to claim 1, characterized in that: The tail end of the crank (7) is rotatably connected to a notch on one side of the outer wall of the parallel part (3), and one end located in the notch is an irregularly shaped gear in the shape of an arc, which meshes with the main gear (101).

6. The negative pressure suction bile duct stone removal auxiliary device for hepatobiliary surgery according to claim 1, characterized in that: The closing mechanism (6) includes a closing cover (61) and a shaft (62). The closing cover (61) is rotatably connected to the tail end of the crank part (4) via the shaft (62). A torque spring (63) is provided on the shaft (62). The torque spring (63) is assembled to drive the closing cover (61) to maintain a maximum opening degree of 90° with the tail end of the crank part (4).

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