An auxiliary device for removing gallstones from the cystic duct

Abstract

The application provides an auxiliary device for removing gallbladder stones from a cystic duct, which comprises a longitudinal extension body with a proximal end and a distal end, and a dilating body connected to the distal end of the longitudinal extension body, the cross section of the dilating body increases along a first longitudinal direction, and the dilating body is provided with an open slot, wherein the first longitudinal direction is opposite to the direction of the auxiliary device entering a target subject. Based on the auxiliary device for removing gallbladder stones from a cystic duct, the application uses a cystic duct incision method to replace a bile duct incision method, specifically, after gallbladder removal, the auxiliary device is placed along the cystic duct, and a knife placed in the open slot is used to incise the cystic duct, so that the dilating body of the auxiliary device is used to dilate the cystic duct with a small diameter, and the operation purpose is achieved. Since the bile duct is not damaged, the patient does not need to be placed with a T-shaped drainage tube after the operation, and the postoperative pain of the patient is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to an auxiliary device for removing bile duct stones from the cystic duct. Background Technology

[0002] Cholangioscopy has become increasingly important in the diagnosis and treatment of biliary stones. For example, it allows for endoscopic observation of the internal structure of the hepatobiliary system, helping surgeons to comprehensively understand the size of the stones, bile duct strictures, and other clinical symptoms, providing a reliable basis for surgical decisions. Techniques such as endoscopic stone removal and fragmentation can effectively improve stone clearance rates and reduce residual stone rates, significantly enhancing surgical efficacy. However, most current surgeries involve open bile duct stone removal. After suturing the bile duct, strictures can occur, requiring the placement of a T-tube for 3-6 months. This placement causes significant pain and disrupts the patient's daily life. Summary of the Invention

[0003] One of the objectives of this invention is to provide an auxiliary device for removing bile duct stones from the cystic duct, so as to eliminate the need for a drainage tube in the patient's bile duct after stone surgery, thereby greatly reducing the patient's postoperative pain.

[0004] To achieve the above objectives, according to an embodiment of this application, the present invention provides the following technical solution: an auxiliary device for removing bile duct stones from the cystic duct, the auxiliary device comprising a longitudinal extension having a proximal end and a distal end, and an expansion body connected to the distal end of the longitudinal extension, wherein the cross-sectional dimensions of the longitudinal extension are consistent, the cross-section of the expansion body gradually increases along a first longitudinal direction and the maximum value of the cross-section of the expansion body exceeds the cross-sectional dimensions of the longitudinal extension, and the expansion body is provided with an opening groove, wherein the first longitudinal direction is opposite to the direction in which the auxiliary device enters the target receptor.

[0005] Preferably, the auxiliary device is further provided with a front end, which is connected to the proximal end of the longitudinal extension body. The diameter of the front end gradually decreases along a second longitudinal direction, wherein the second longitudinal direction is consistent with the direction in which the auxiliary device enters the target receptor.

[0006] Preferably, the front end is frustum-shaped.

[0007] Preferably, the expansion body partially or completely wraps around the distal end of the longitudinal extension on both sides.

[0008] Preferably, the expansion body is provided with a scale, and the diameter of the expansion body is in the range of 2mm to 10mm.

[0009] Preferably, the opening groove extends through the middle of the expansion body and the width of the opening groove remains constant.

[0010] Preferably, the width of the opening groove is 0.5mm to 2mm.

[0011] Preferably, the auxiliary equipment further includes a plate-shaped component, one end of which is connected to the expansion body and the other end of which is connected to an anti-fall-off component.

[0012] Preferably, the anti-detachment component includes an anti-detachment ring, an anti-detachment connector, or an anti-detachment clip.

[0013] Preferably, the maximum width of the anti-detachment ring is in the range of 8mm to 20mm.

[0014] Compared with the prior art, the beneficial effects of the present invention include: This application is based on an auxiliary device for removing bile duct stones from the cystic duct, which uses the method of cystic duct incision instead of bile duct incision. Specifically, after cholecystectomy, the auxiliary device is placed along the cystic duct, and the cystic duct is incised by a knife placed in the opening groove. Then, the expansion body of the auxiliary device is used to expand the small-diameter cystic duct to achieve the purpose of the surgical operation. Since the bile duct is not damaged, the patient does not need to leave a T-shaped drainage tube after the operation, which greatly reduces the patient's pain after the operation.

[0015] In addition, the auxiliary device of this application is also provided with a front end. Since the diameter of the front end decreases along the longitudinal direction, it is convenient for the auxiliary device to smoothly enter the cystic duct for operation.

[0016] In addition, to ensure the smooth entry of the auxiliary equipment into the cystic duct and avoid puncturing the cystic duct, the front end is a frustum with a gradually decreasing diameter rather than a cone, which further improves the safety of the operation and minimizes damage to the bile tissue.

[0017] In addition, the expansion body of this application is semi-enclosed, which on the one hand helps the operator to expand smoothly based on the extension of the longitudinal extension body to the expansion body, and on the other hand facilitates other surgical tools such as knives to be placed in the opening groove of the expansion body in a way such as insertion or embedding to achieve the purpose of cutting the gallbladder duct.

[0018] In addition, the expansion body of this application is also provided with graduations, which can effectively solve the problem of not being able to determine the expansion size during the expansion process of gallbladder ducts with small diameters.

[0019] In addition, to prevent the auxiliary equipment from accidentally slipping or falling during operation, the auxiliary equipment of this application is also equipped with a plate-like component. After the operator cuts open the cystic duct, he or she can use a long-handled scalpel or other tools to clamp the plate-like component and press down the auxiliary equipment to dilate the cystic duct. Once the bile flows out, it is confirmed that the cystic duct has been successfully cut open.

[0020] In addition, to further improve the safety of surgical procedures, this application also includes an anti-detachment component, which can effectively prevent the auxiliary equipment of this application from slipping from the cystic duct into the bile duct during surgery, and also reduces the operational difficulty and risk of the auxiliary equipment of this application.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0022] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 A simplified structural diagram of an auxiliary device for removing bile duct stones from the cystic duct, provided as an embodiment of this application;

[0024] Figure 2 The example shows images of common kidney stones found in patients.

[0025] Figure 3 The example is a schematic diagram of the tissues related to the bile duct;

[0026] The same or similar reference numerals in the accompanying drawings represent the same or similar structures. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0029] To better understand the device described in this application, please refer to [the relevant documentation / reference]. Figure 2 and Figure 3 , Figure 2 The example shows images of common kidney stones found in patients. Figure 3The example diagram illustrates the tissues related to the bile duct. Common gallstones encountered by patients in daily life include gallbladder stones22, intrahepatic bile duct stones21, and common bile duct stones23; the human bile duct tissue includes the gallbladder31, cystic duct32, hepatobiliary duct33, common bile duct34, and spiral valve-like structures35. Currently, most gallstone surgeries involve bile duct incision and stone removal. However, suturing after the incision can lead to bile duct stenosis, requiring the placement of a T-tube drainage system for 3-6 months post-suturing, causing significant patient discomfort and disrupting their daily lives.

[0030] To address the issue of T-tube placement, the inventors of this application, based on years of medical surgical practice, have ingeniously designed an auxiliary device for removing bile duct stones from the cystic duct through numerous detailed adjustments. Although the device appears small, it solves the long-standing problem of placement in gallstone surgery. Compared to existing technologies, the device of this application achieves outstanding medical and technical results.

[0031] Please refer to Figure 1 , Figure 1 This is a schematic diagram of an auxiliary device for removing bile duct stones from the cystic duct, provided as an embodiment of this application. Figure 1 The auxiliary device provided in this application includes a longitudinal extension 11 having a proximal end 111 and a distal end 112, and an expansion body 12 connected to the distal end 112 of the longitudinal extension 11. The longitudinal extension 11 has a consistent cross-sectional size, and the cross-section of the expansion body 12 gradually increases along a first longitudinal direction, with the maximum value of the cross-section of the expansion body 12 exceeding the cross-sectional size of the longitudinal extension 11. The expansion body 12 is provided with an opening groove 13, wherein the first longitudinal direction is opposite to the direction in which the auxiliary device enters the target receptor.

[0032] This application is based on an auxiliary device for removing bile duct stones from the cystic duct. It uses the method of cystic duct incision instead of bile duct incision. Specifically, after cholecystectomy, the auxiliary device is placed along the cystic duct, and the cystic duct is incised by a blade placed in the opening groove. Then, the dilator of the auxiliary device is used to dilate the small-diameter cystic duct to achieve the purpose of the surgical operation. Since the bile duct is not damaged, the patient does not need to leave a T-shaped drainage tube after the operation, which greatly reduces the patient's postoperative pain.

[0033] Specifically, in order to improve the smoothness of operation, all or most of the longitudinal extension 11 may have a consistent or substantially consistent thickness and / or cross-section.

[0034] Preferably, to further facilitate the smooth entry of the auxiliary device into the cystic duct for operation, the auxiliary device is further provided with a front end 16, which is connected to the proximal end 111 of the longitudinal extension 11. The diameter of the front end 16 gradually decreases along a second longitudinal direction, wherein the second longitudinal direction is consistent with the direction in which the auxiliary device enters the target receptor. Preferably, the front end 16 is a frustum-shaped section with a gradually decreasing diameter, to ensure smooth entry of the auxiliary device into the cystic duct while avoiding injury to the cystic duct. The front end is frustum-shaped rather than conical, further improving the safety of the surgery and minimizing damage to the bile tissue. That is, as... Figure 1 As shown, the cross-section of the front end 16 gradually decreases. The front end 16 can be extended from the longitudinal extension body 11, that is, the front end 16 and the longitudinal extension body 11 can be an integral structure to improve the load-bearing capacity of the entire auxiliary equipment in the longitudinal direction and ensure that the overall structural strength of the entire auxiliary equipment reaches the optimal level.

[0035] The dilator 12 can partially or completely wrap around the distal end 112 of the longitudinal extension 11 on both sides. Preferably, the dilator 12 partially wraps around the distal end 112 of the longitudinal extension 11 on both sides. The advantage of partial wrapping is that, on the one hand, it helps the operator to smoothly expand based on the extension of the longitudinal extension towards the dilator; on the other hand, it also facilitates the placement of other surgical tools such as scalpels into the opening groove of the dilator wrapping by means of insertion or embedding to achieve the purpose of cutting the cystic duct.

[0036] Preferably, the dilator body 12 is provided with a scale 121, which can effectively solve the problem of not being able to determine the dilation size during the dilation process of a small-diameter gallbladder duct. Based on the inventors' many years of practical experience, in order to achieve the best or better dilation effect, the diameter range of the dilator body 12 is 2mm to 10mm to avoid over-dilation of the gallbladder duct and damage. To further facilitate the auxiliary equipment in entering the operating depth each time, the minimum span of the scale is preferably 0.5mm or 1mm, so that the operator can better grasp the operating range.

[0037] Preferably, to better accommodate the dimensions of different auxiliary tools such as curved forceps during surgery, and to facilitate surgical operations, the width of the opening groove 13 is preferably 0.5mm to 2mm. More preferably, to ensure the stability of the operation, the opening groove 13 extends through the middle of the expansion body 12, and the width of the opening groove 13 remains constant.

[0038] Preferably, to prevent the auxiliary equipment from accidentally slipping or falling during operation, the auxiliary equipment of this application is also equipped with a plate-shaped component 14 (or "removal plate"). After the operator cuts the cystic duct, they can use a long-handled lance or other tool to clamp the plate-shaped component and press down the auxiliary equipment to dilate the cystic duct. Once bile flows out, it is confirmed that the cystic duct has been successfully cut. One end of the plate-shaped component 14 is connected to the dilation body 12, and the other end is connected to the anti-fall-off component 15.

[0039] Preferably, in addition to further improving the safety of the surgical procedure, this application also includes an anti-dislodgement component, which can effectively prevent the auxiliary equipment of this application from slipping from the cystic duct into the bile duct during surgery, and also reduces the operational difficulty and risk of the auxiliary equipment of this application. The anti-dislodgement component 15 includes an anti-dislodgement ring, an anti-dislodgement connector, or an anti-dislodgement clip. The structure of the anti-dislodgement ring, anti-dislodgement connector, or anti-dislodgement clip can refer to the prior art, and other anti-dislodgement components in the prior art that are compatible with this application are all included within the protection scope of this application.

[0040] Preferably, based on the inventor's operational experience and taking into account both safety and ease of operation, the maximum width range of the anti-detachment ring is 8mm to 20mm.

[0041] In addition, the auxiliary equipment of this application can be made of a relatively strong, durable, and relatively hard polyester structure, including but not limited to polymethyl acrylate or polymethyl methacrylate.

[0042] It should be noted that, Figure 1 These are merely preferred embodiments of the present invention. All equivalent alternatives or obvious modifications of the embodiments given in the specification that can be reasonably predicted by those skilled in the art to achieve the purpose of the present invention are also included within the scope of protection of the present invention.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0044] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An auxiliary device for removing bile duct stones from the cystic duct, characterized in that, The auxiliary device includes a longitudinal extension having a proximal end and a distal end, and an expansion body connected to the distal end of the longitudinal extension. The longitudinal extension has a consistent cross-sectional dimension, and the expansion body has a cross-section that gradually and smoothly increases along a first longitudinal direction, with the maximum value of the expansion body's cross-section exceeding that of the longitudinal extension. The expansion body has an opening groove, wherein the first longitudinal direction is opposite to the direction in which the auxiliary device enters the target receptor. The expansion body partially encloses the distal end of the longitudinal extension on both sides. The opening groove is capable of accommodating a tool for cutting the cystic duct. The partially enclosed structure of the expansion body forms supports on both sides of the opening groove to guide the tool, housed in the opening groove, to stably cut the cystic duct wall in a predetermined direction within the curved cavity of the cystic duct. Subsequently, the cystic duct is progressively dilated by the gradually increasing expansion body, thereby establishing an instrument channel through the cystic duct into the common bile duct.

2. The auxiliary equipment according to claim 1, characterized in that, The auxiliary device is further provided with a front end, which is connected to the proximal end of the longitudinal extension body. The diameter of the front end gradually decreases along a second longitudinal direction, wherein the second longitudinal direction is consistent with the direction in which the auxiliary device enters the target receptor.

3. The auxiliary equipment according to claim 2, characterized in that, The front end is shaped like a frustum.

4. The auxiliary equipment according to claim 1, characterized in that, The expansion body is provided with a scale, and the diameter of the expansion body ranges from 2mm to 10mm.

5. The auxiliary equipment according to claim 1, characterized in that, The opening groove extends through the middle of the expansion body and its width remains constant.

6. The auxiliary equipment according to claim 5, characterized in that, The width of the opening groove is 0.5mm to 2mm.

7. The auxiliary equipment according to claim 1, characterized in that, The auxiliary equipment also includes a plate-shaped component, one end of which is connected to the expansion body and the other end of which is connected to the anti-fall-off component.

8. The auxiliary equipment according to claim 7, characterized in that, The anti-detachment component includes an anti-detachment ring, an anti-detachment connector, or an anti-detachment clip.

9. The auxiliary equipment according to claim 8, characterized in that, The maximum width of the anti-detachment ring is 8mm to 20mm.

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