Gallbladder duct puncture dilator

Abstract

The invention discloses a gallbladder tube puncture dilator, and belongs to the technical field of medical instruments. The dilator comprises a sleeve and a needle core, the sleeve comprises a first pipe section, a plurality of second pipe sections and a third pipe section from the front end to the tail end of the sleeve, the outer diameters of the first pipe section, the second pipe sections and the third pipe section are sequentially increased, and the needle core penetrates through and is fixed in the sleeve. The dilator is applied to a laparoscope common bile duct exploration operation through a gall bladder duct and used for opening the gall bladder duct, and the specific process is as follows: after the dilator punctures the gall bladder duct to form a pre-incision, the pre-incision is flared step by step based on the first tube section, the second tube sections and the third tube sections in the dilator, and then the incision is completed according to the target size. The cholecystic duct is opened according to the mode, it is guaranteed that the cut opening is enough for the choledochoscope to be placed, the situation that the common bile duct or the common hepatic duct is damaged and even the cholecystic duct is cut off due to the fact that the cut opening is too large is avoided, and the operation safety and the application range are improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a cystic duct puncture dilator. Background Art

[0002] Laparoscopic Transcystic Common Bile Duct Exploration (LTCBDE) is a minimally invasive surgical procedure that combines laparoscopic technology with bile duct exploration technology. The operation mainly utilizes the natural bile duct of the human cystic duct. With the assistance of laparoscope, part of the laparoscopic cholecystectomy must be completed first, that is, separating the adhesions between the gallbladder and the surrounding tissues, and freeing the cystic duct and cystic artery. Then, instead of directly cutting open the common bile duct for exploration as in traditional open surgery, a choledochoscope is inserted through the relatively small channel of the cystic duct, allowing the choledochoscope to enter the common bile duct and observe the inside of the common bile duct.

[0003] The main purpose of this operation is to explore whether there are lesions in the common bile duct. The most common purpose is to check and remove stones in the common bile duct. Through the choledochoscope, the doctor can clearly see the situation in the common bile duct, including the size, number, location and other information of the stones. If stones are found, special instruments such as stone removal baskets can be used to remove the stones through the cystic duct. In addition, this operation can also be used to check whether there are other lesions such as inflammation, stenosis, tumors, etc. in the common bile duct. From a technical point of view, this operation fully utilizes the characteristics of laparoscopic surgery with low trauma. Compared with traditional open common bile duct exploration, laparoscopic common bile duct exploration through the cystic duct avoids making a large incision on the common bile duct and reduces the damage of the operation to the biliary system and surrounding tissues. Moreover, the use of the cystic duct as a channel maintains the integrity of the common bile duct to a certain extent, reducing the risk of complications such as postoperative bile leakage and common bile duct stenosis.

[0004] When trying to open the cystic duct for common bile duct exploration, the current mainstream method is to use an electric knife to cut a small hole in the cystic duct. The specific size of the hole is determined by the surgeon's experience. This operation may cut the cystic duct, or the hole may be too large, damaging the common bile duct or common hepatic duct. At the same time, this operation also limits the scope of application of the operation. For patients with a cystic duct smaller than 4mm, it is difficult to perform this procedure. Summary of the invention

[0005] The purpose of the present invention is to provide a cystic duct puncture dilator for use in laparoscopic transcystic duct common bile duct exploration to open the cystic duct, thereby ensuring that the opening is large enough to insert a choledochoscope, while avoiding damage to the common bile duct or common hepatic duct or even severing the cystic duct due to the opening being too large, thereby improving the safety and scope of application of the operation.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A gallbladder duct puncture dilator, comprising a cannula and a needle core;

[0008] The sleeve includes a first pipe section, a plurality of second pipe sections and a third pipe section from its front end to its rear end, and the outer diameters of the first pipe section, the plurality of second pipe sections and the third pipe section increase in sequence;

[0009] The needle core penetrates through and is fixed in the sleeve.

[0010] Furthermore, the second pipe segment is divided into three segments, the outer diameters of the three segments of the second pipe segment are 2 mm, 3 mm, and 4 mm respectively, and the outer diameter of the third pipe segment is 5 mm.

[0011] Furthermore, the three second pipe sections are of equal length.

[0012] Furthermore, the length of the second tube segment is 1 cm.

[0013] Furthermore, arc chamfers are provided on the outer circumferences of the front ends of the second pipe segment and the third pipe segment.

[0014] Furthermore, the outer diameter of the first tube section is 1.65 mm.

[0015] Furthermore, the length of the first tube segment is 2 cm.

[0016] Furthermore, the length of the sleeve is 50 cm.

[0017] Furthermore, the end of the needle core is provided with a tail cap fixedly connected thereto, and the tail cap is detachably connected to the end of the sleeve.

[0018] Furthermore, the tail cap is threadedly connected to the end of the sleeve.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a cystic duct puncture dilator, which is used in laparoscopic transcystic duct common bile duct exploration and is used to open the cystic duct. The specific process is as follows: the cystic duct is punctured by the dilator to form a pre-incision, and the pre-incision is gradually expanded based on the first tube segment, several second tube segments and the third tube segment in the dilator, and then the incision is completed according to the target size. Opening the cystic duct in the above manner not only ensures that the incision is large enough to insert a choledochoscope, but also avoids the incision being too large to damage the common bile duct or the common hepatic duct, or even cut off the cystic duct, thereby improving the safety and scope of application of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a structural schematic diagram of a cystic duct puncture dilator of the present invention;

[0022] Figure 2 The present invention is a schematic structural diagram of a sleeve in a gallbladder duct puncture dilator.

[0023] Marking instructions: 1. Sleeve, 101. First tube section, 102. Second tube section, 103. Third tube section, 2. Needle core, 3. Tail cap. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] See also Figures 1-2 As shown, a cystic duct puncture dilator includes sleeves 1 and 2, wherein the sleeve 1 is made of polyurethane or silicone, and the needle core 2 is made of metal.

[0026] The sleeve 1 includes a first pipe section 101 , a plurality of second pipe sections 102 and a third pipe section 103 from its front end to its rear end, and the outer diameters of the first pipe section 101 , the plurality of second pipe sections 102 and the third pipe section 103 increase sequentially.

[0027] In this embodiment, illustratively, the dimensions of the sleeve 1 are designed as follows:

[0028] The outer diameter of the first tube section 101 is 1.65 mm, and the length of the first tube section 101 is 2 cm;

[0029] The second pipe section 102 is divided into three sections, from the front end to the end of the sleeve 1, the outer diameters of the three sections of the second pipe section 102 are 2 mm, 3 mm, and 4 mm respectively, the three sections of the second pipe section 102 are of equal length, and the length of the second pipe section 102 is 1 cm;

[0030] The outer diameter of the third pipe section 103 is 5 mm;

[0031] The length of the sleeve 1 is 50 cm, that is, the length of the third pipe section 103 is 45 cm.

[0032] In the above technical solution, preferably, arc chamfers are provided on the outer circumferences of the front ends of the second tube segment 102 and the third tube segment 103. According to the above design, it is more convenient for the front ends of the second tube segment 102 and the third tube segment 103 to be inserted into the gallbladder duct.

[0033] The needle core 2 penetrates through and is fixed in the sleeve 1 to play a puncture role.

[0034] In order to prevent the needle core 2 from withdrawing from the sleeve 1 during puncture, a tail cap 3 fixedly connected to the end of the needle core 2 is provided, and the tail cap 3 is detachably connected to the end of the sleeve 1.

[0035] In this embodiment, illustratively, the tail cap 3 is threadedly connected to the end of the sleeve 1 .

[0036] In addition, the tail cap 3 and the end of the sleeve 1 can also be connected by clamping.

[0037] The present invention is applied in laparoscopic transcystic duct common bile duct exploration to open the cystic duct, and the specific process is as follows: after puncturing the cystic duct with the dilator to form a pre-incision, the pre-incision is gradually expanded based on the first tube segment 101, several second tube segments 102 and the third tube segment 103 in the dilator, and then the incision is completed according to the target size.

[0038] More specifically, when the target size of the incision is 5 mm, the process of opening the cystic duct is as follows:

[0039] S1, puncturing the first tube section 101 of the dilator into the cystic duct to form a pre-incision, and then withdrawing the needle core 2;

[0040] S2, expanding the pre-incision, and inserting the second tube segment 102 with an outer diameter of 2 mm into the gallbladder duct;

[0041] S3, expanding the pre-incision, and inserting the second tube segment 102 with an outer diameter of 3 mm into the gallbladder duct;

[0042] S4, expanding the pre-incision, and inserting the second tube segment 102 with an outer diameter of 4 mm into the gallbladder duct;

[0043] S5, expanding the pre-incision, inserting the third tube segment 103 into the gallbladder duct, and then pulling out the cannula 1 to complete the incision;

[0044] S6. Insert the choledochoscopic endoscope into the common bile duct through the incision to observe the interior of the common bile duct.

[0045] Opening the cystic duct in the above manner ensures that the opening is large enough to insert a choledochoscope, while avoiding the opening being too large to damage the common bile duct or common hepatic duct, or even severing the cystic duct, thereby improving the safety and applicability of the operation.

[0046] It should be noted that the structural design and size design of the sleeve 1 can be changed according to surgical requirements, such as the number of second tube segments 102, the outer diameter of each second tube segment 102, the outer diameter of the third tube segment 103, and so on.

[0047] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art can implement the present invention in various other specific implementation modes based on the contents disclosed in the present invention. Therefore, any design that adopts the design structure and concept of the present invention and makes some simple changes or modifications shall fall within the scope of protection of the present invention.

Claims

1. A cystic duct puncture dilator, characterized in that: Including a cannula and a needle core; The sleeve includes a first pipe section, a plurality of second pipe sections and a third pipe section from its front end to its rear end, and the outer diameters of the first pipe section, the plurality of second pipe sections and the third pipe section increase in sequence; The needle core penetrates through and is fixed in the sleeve.

2. A cystic duct puncture dilator according to claim 1, characterized in that: The second pipe segment is divided into three sections, and the outer diameters of the three sections of the second pipe segment are 2 mm, 3 mm, and 4 mm respectively. The outer diameter of the third pipe segment is 5 mm.

3. A cystic duct puncture dilator according to claim 2, characterized in that: The three second pipe sections are of equal length.

4. A cystic duct puncture dilator according to claim 3, characterized in that: The length of the second tube section is 1 cm.

5. A cystic duct puncture dilator according to any one of claims 1 to 4, characterized in that: The outer circumferences of the front ends of the second pipe section and the third pipe section are both provided with arc chamfers.

6. A cystic duct puncture dilator according to claim 1, characterized in that: The outer diameter of the first tube section is 1.65 mm.

7. A cystic duct puncture dilator according to claim 6, characterized in that: The length of the first tube section is 2 cm.

8. The cystic duct puncture dilator according to claim 7, characterized in that: The length of the sleeve is 50 cm.

9. The cystic duct puncture dilator according to claim 1, characterized in that: The end of the needle core is provided with a tail cap fixedly connected thereto, and the tail cap is detachably connected to the end of the sleeve.

10. A cystic duct puncture dilator according to claim 9, characterized in that: The tail cap is threadedly connected to the end of the sleeve.

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