Pancreaticobiliary stent
By designing a pancreatic bile pancreatic stent with an adjunct tube and ancillary structure, the pancreatic bile duct is directly inserted under the guidance of a guide wire, and the extubation process is simplified through an easy-to-grab design, the existing pancreatic bile pancreatic stent has a long time and low efficiency. The poor safety problem has achieved more efficient and safe operation of the bile pancreatic duct stent.
Patent Information
- Application Number
- CN202411567187.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2024-12-20
AI Technical Summary
The existing bile pancreatic stent structure leads to long surgery time, low efficiency, poor safety, and complicated stent use steps and inconvenient removal.
A pancreatic bile stent is designed, including a first stent and a second stent for being arranged on the first guide wire, and is directly pushed by the secondary tube on the first support under the guidance of the first guide wire and the second guide wire The second stent is inserted into the pancreatic duct and the first stent is inserted into the bile duct using the guiding effect of the first guide wire to simplify the operation steps; at the same time, the attachment structure of the second stent makes it easy to be grasped by foreign body forceps on the endoscope, simplifying the operation steps. The tube is extracted and the connection between the brackets is achieved through leads or loop wires for easy extraction.
Save surgical time, improve surgical efficiency and safety, simplify operating steps, shorten the time for extubation, reduce costs, and improve practicality.
Smart Images
Figure CN119157667A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of medical devices, and in particular relates to a pancreaticobiliary stent. Background Art
[0002] Endoscopic retrograde cholangiopancreatography (ERCP) refers to the technique of inserting a duodenoscope into the descending duodenum, finding the duodenal papilla, inserting a contrast catheter through the biopsy channel to the papilla opening, injecting contrast agent, and then taking X-rays to display the pancreaticobiliary duct.
[0003] Selective intubation is the basis for smooth ERCP diagnosis and treatment. Insert the catheter through the biopsy hole, adjust the catheter angle and the lifting forceps, make the catheter perpendicular to the nipple opening, and insert the catheter into the nipple. Because the beginning of the duodenal papilla is very narrow, it is very difficult to insert the catheter directly into the nipple, and there is a high risk of pancreatic and bile duct bleeding and perforation, which will endanger the patient's life once it occurs. At present, a guide wire is generally inserted in clinical practice. The diameter of the guide wire is generally 0.025 inches or 0.035 inches, made of metal, with a soft head at the front end and the head will be visualized under X-rays. After the doctor inserts the guide wire into the duodenal papilla and enters the correct direction (pancreatic duct or bile duct), the catheter is inserted.
[0004] In some ERCP surgeries, catheters need to be placed in both the pancreatic duct and the bile duct. Due to the limitations of existing equipment, the placement of the catheters in the pancreatic duct and the bile duct is independent of each other during the operation and needs to be placed separately. Depending on the patient's condition, the pancreatic duct and bile duct stents need to be left in place for different periods of time, and there are special circumstances such as stent displacement and deformation.
[0005] In summary, current technologies and equipment have practical problems such as long operation time, low efficiency, complicated steps for using stents, low safety and inconvenient removal, which need to be urgently addressed. Summary of the invention
[0006] The purpose of the present invention is to provide a pancreaticobiliary stent to solve the problems of long operation time, low efficiency and poor safety caused by structural defects of existing pancreaticobiliary stents.
[0007] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows: A pancreaticobiliary stent comprises a first stent for sleeved on a first guide wire; The first stent is used to be inserted into the bile duct under the guidance of a first guide wire; An auxiliary tube sleeved on the second guide wire is fixedly provided on the outer side of the distal end of the first stent, and the auxiliary tube is used to push the second stent sleeved on the second guide wire to be inserted into the pancreatic duct.
[0008] With this structural design, the second stent can be directly pushed into the pancreatic duct through the auxiliary tube on the first stent under the guidance of the first guide wire and the second guide wire. After the second guide wire is pulled out, the first stent can be inserted into the bile duct using the guiding effect of the first guide wire. There is no need to pull out the pushing mechanism for the second stent and then reinsert the first stent, which saves operation time and improves operation efficiency.
[0009] A pancreaticobiliary stent comprises a second stent, wherein the second stent is used for inserting into a pancreatic duct under the guidance of a second guide wire; The proximal end of the second stent is provided with an accessory structure for being grasped, and the tail of the accessory structure is located outside the major duodenal papilla.
[0010] Such a structural design, through the setting of the auxiliary structure, makes it easier for the second stent to be grasped by the foreign body forceps on the endoscope, thereby making the operation more convenient when removing the second stent inserted in the pancreatic duct, shortening the removal time, improving the operation efficiency, and being more practical.
[0011] It is further defined that the auxiliary structure is a ring-shaped wire, a radial hole is opened at the proximal end of the second stent, and the ring-shaped wire is inserted into the radial hole.
[0012] This structural design uses a looped silk thread as an auxiliary structure for the foreign body forceps on the endoscope to grasp. It has a simple structure, is easy to grasp, has low cost, and is highly practical.
[0013] A pancreaticobiliary stent, comprising: a first stent, which is sleeved on a first guide wire and is used to be inserted into the bile duct under the guidance of the first guide wire; a second stent, the second stent being sleeved on the second guide wire and used for being inserted into the pancreatic duct under the guidance of the second guide wire; An auxiliary tube sleeved on the second guide wire is fixedly provided on the outer side of the distal end of the first stent, and the auxiliary tube is used to push the second stent into the pancreatic duct.
[0014] With this structural design, the second stent can be directly pushed into the pancreatic duct through the auxiliary tube on the first stent under the guidance of the first guide wire and the second guide wire. After the second guide wire is pulled out, the first stent can be inserted into the bile duct using the guiding effect of the first guide wire. There is no need to pull out the pushing mechanism for the second stent and then reinsert the first stent, which saves operation time and improves operation efficiency.
[0015] It is further defined that a lead is connected between the distal end of the first stent and the proximal end of the second stent.
[0016] This structural design completes the connection between the first stent and the second stent through a lead wire. When the first stent and the second stent need to be completely removed, the first stent can be directly pulled to drive the second stent out of the pancreatic duct through the lead wire, thus saving operation time and being highly practical.
[0017] It is further defined that the distal end of the first stent and the proximal end of the second stent are both provided with an auxiliary structure; The two auxiliary structures are looped wires that can be connected to each other.
[0018] With such a structural design, the looped wire is used as an auxiliary structure. When the second stent is used alone, the looped wire on the second stent can be used as a component for the foreign body forceps on the endoscope to grasp when the second stent is pulled out, so as to facilitate the pulling out of the second stent. At the same time, when the first stent and the second stent are used together and need to be removed together during the subsequent removal process, the annular wire on the first stent and the annular wire on the second stent can be connected together before the first stent and the second stent are placed into the human body to achieve the connection between the first stent and the second stent. Then, when it is necessary to remove the first stent and the second stent completely, the first stent can be directly pulled to drive the second stent out of the pancreatic duct through the connection of the two annular wires, thereby saving operation time and being highly practical.
[0019] It is further defined that the second bracket is in the shape of a straight tube, and outer walls at both ends of the second bracket are provided with side wings.
[0020] Such a structural design forms support for the second stent in the form of a straight tube in the pancreatic duct through the side wings at both ends, thereby reducing the possibility of the second stent falling off from the pancreatic duct and having strong practicality.
[0021] It is further defined that the proximal end of the second bracket is arc-shaped, and the distal outer wall of the second bracket is provided with side wings.
[0022] This structural design forms support for the distal end of the second stent in the pancreatic duct through the flanks, and supports the proximal end of the second stent through the arc-shaped proximal end, thereby reducing the possibility of the second stent falling off from the pancreatic duct. It has a simple structure and strong practicality.
[0023] It is further defined that the distal end of the first bracket is arc-shaped.
[0024] Such a structural design forms support for the first stent in the bile duct through the arc-shaped distal end, thereby reducing the possibility of the first stent falling off from the bile duct. The structure is simple and practical.
[0025] The invention adopting the above technical solution has the following advantages: 1. Through the auxiliary tube on the first stent, under the guidance of the first guide wire and the second guide wire, the second stent is directly pushed into the pancreatic duct, and then after the second guide wire is pulled out, the first stent is inserted into the bile duct by using the guiding effect of the first guide wire, without pulling out the pushing mechanism for the second stent and then reinserting the first stent, thus saving operation time and improving operation efficiency, thereby improving operation safety by reducing operation steps and improving operation efficiency; 2. The auxiliary structure makes it easier for the second stent to be grasped by the foreign body forceps on the endoscope, thereby making it more convenient to remove the second stent inserted in the pancreatic duct, shortening the extubation time, improving the surgical efficiency, and having strong practicality; 3. The looped silk thread is used as an auxiliary structure for the foreign body forceps on the endoscope to grasp, which has a simple structure, convenient grasping, low cost and strong practicality; 4. The connection between the first stent and the second stent is completed by the guide wire. When the first stent and the second stent need to be completely pulled out, the first stent can be directly pulled to drive the second stent out of the pancreatic duct through the guide wire, which saves operation time and is highly practical. 5. By using the looped wire as an auxiliary structure, when the second stent is used alone, the looped wire on the second stent can be used as a component for the foreign body forceps on the endoscope to grasp when the second stent is pulled out, so as to facilitate the pulling out of the second stent; At the same time, when the first stent and the second stent are used together and need to be removed together during the subsequent removal process, the annular wire on the first stent and the annular wire on the second stent can be connected together before the first stent and the second stent are placed into the human body to achieve the connection between the first stent and the second stent. Then, when it is necessary to remove the first stent and the second stent completely, the first stent can be directly pulled to drive the second stent out of the pancreatic duct through the connection of the two annular wires, thereby saving operation time and being highly practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings; Figure 1 This is a schematic structural diagram of the first stent portion in an embodiment of a pancreatic and biliary stent of the present invention; Figure 2 The structure of the second stent part of a pancreatic and biliary stent embodiment of the present invention is schematically shown. Figure 1 ; Figure 3 The structure of the second stent part of a pancreatic and biliary stent embodiment of the present invention is schematically shown. Figure 2 ; Figure 4 It is a schematic structural diagram of a pancreatic and biliary stent embodiment of the present invention; The main component symbols are described as follows: The first bracket 1, the auxiliary pipe 10, The second bracket 2, the auxiliary structure 20, the side wing 21, Lead 3. DETAILED DESCRIPTION
[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions of the specification, similar or identical parts use the same figure numbers, and the implementation methods not shown or described in the drawings are forms known to ordinary technicians in the relevant technical field. In addition, the directional terms mentioned in the embodiments, such as "upper", "lower", "top", "bottom", "left", "right", "front", "back", etc., are only referenced to the directions of the drawings and are not used to limit the scope of protection of the present invention. Embodiment 1:
[0028] like Figure 1 As shown, a pancreatic and biliary stent of the present invention comprises a first stent 1 for sleeved on a first guide wire; The first stent 1 is used to be inserted into the bile duct under the guidance of a first guide wire; An auxiliary tube 10 sleeved on the second guide wire is fixedly provided on the outer side of the distal end of the first stent 1 , and the auxiliary tube 10 is used to push the second stent 2 sleeved on the second guide wire to be inserted into the pancreatic duct.
[0029] Through the auxiliary tube 10 on the first stent 1, under the guidance of the first guide wire and the second guide wire, the second stent 2 is directly pushed into the pancreatic duct, and then after the second guide wire is pulled out, the first stent 1 is inserted into the bile duct using the guiding effect of the first guide wire. There is no need to pull out the pushing mechanism for the second stent 2 and then reinsert the first stent 1, which saves operation time and improves operation efficiency.
[0030] In this embodiment, when inserting the first bracket 1 and the second bracket 2, the following steps are included: 1. Insert the endoscope through the human mouth until the endoscope sees the major duodenal papilla (the opening of the common bile duct); 2. Insert the second guide wire along the endoscope. Under the observation of the endoscope, insert the second guide wire into the major papilla of the duodenum and insert it into the pancreatic duct through the common bile duct under X-ray. 3. Insert the first guide wire along the endoscope, and insert it into the major papilla of the duodenum under the observation of the endoscope, and then insert it into the common bile duct under X-ray; 4. Place a second stent 2 on the second guide wire inserted into the pancreatic duct; 5. The first stent 1 is sheathed on the first guide wire inserted into the bile duct, and the auxiliary tube 10 of the first stent 1 is sheathed on the second guide wire; 6. Under endoscope observation, use the auxiliary tube 10 of the first stent 1 to push the second stent 2, so as to drive the second stent 2 into the common bile duct through the major papilla of the duodenum; 7. Under X-ray observation, use the auxiliary tube 10 of the first stent 1 to push the second stent 2, so that the second stent 2 enters the pancreatic duct along the second guide wire; 8. Pull out the second guide wire inserted into the second stent 2; 9. Under X-ray observation, continue to push the first stent 1 so that the first stent 1 continues to extend into the common bile duct along the first guide wire. Embodiment 2:
[0031] like Figure 2 and Figure 3 As shown, a pancreatic and biliary stent of the present invention comprises a second stent 2, and the second stent 2 is used to be inserted into the pancreatic duct under the guidance of a second guide wire; The proximal end of the second stent 2 is provided with an accessory structure 20 for being grasped, and the tail of the accessory structure 20 is located outside the major duodenal papilla.
[0032] By setting the auxiliary structure 20, the second stent 2 is more easily grasped by the foreign body forceps on the endoscope, so that when removing the second stent 2 inserted in the pancreatic duct, the operation is more convenient, the removal time is shortened, the operation efficiency is improved, and the practicality is strong.
[0033] The auxiliary structure 20 is a ring-shaped wire. A radial hole is opened at the proximal end of the second stent 2, and the ring-shaped wire is passed through the radial hole.
[0034] In fact, according to actual conditions, it is also possible to choose to directly open a radial slot at the proximal end of the second bracket 2 and use the radial slot as the accessory structure 20 to be grasped. In this embodiment, a ring-shaped silk thread is used as the accessory structure 20 for the foreign body forceps on the endoscope to grasp. It has a simple structure, is easy to grasp, is low in cost, and is highly practical.
[0035] In this embodiment, when it is necessary to remove the second stent 2 inserted in the pancreatic duct, an endoscope is inserted into the human oral cavity until the endoscope sees the circular silk thread, and then the circular silk thread is grasped with the foreign body forceps on the endoscope, and the endoscope is pulled out, which can drive the second stent 2 out of the pancreatic duct and into the duodenum, and the endoscope is continued to be pulled out until the second stent 2 is pulled out from the human oral cavity. Embodiment three:
[0036] like Figure 1 and Figure 4 As shown, a pancreatic and biliary stent of the present invention comprises: A first stent 1, which is sleeved on a first guide wire and is used for being inserted into the bile duct under the guidance of the first guide wire; A second stent 2, which is sleeved on the second guide wire and is used for being inserted into the pancreatic duct under the guidance of the second guide wire; An auxiliary tube 10 sleeved on the second guide wire is fixedly provided on the outer side of the distal end of the first stent 1 , and the auxiliary tube 10 is used to push the second stent 2 into the pancreatic duct.
[0037] Through the auxiliary tube 10 on the first stent 1, under the guidance of the first guide wire and the second guide wire, the second stent 2 is directly pushed into the pancreatic duct, and then after the second guide wire is pulled out, the first stent 1 is inserted into the bile duct using the guiding effect of the first guide wire. There is no need to pull out the pushing mechanism for the second stent 2 and then reinsert the first stent 1, which saves operation time and improves operation efficiency.
[0038] A lead wire 3 is connected between the distal end of the first stent 1 and the proximal end of the second stent 2 .
[0039] The connection between the first stent 1 and the second stent 2 is completed by the lead wire 3. When the first stent 1 and the second stent 2 need to be completely pulled out, the first stent 1 can be directly pulled to drive the second stent 2 out of the pancreatic duct through the lead wire 3, thereby saving operation time and having strong practicality.
[0040] In this embodiment, when inserting the first bracket 1 and the second bracket 2, the following steps are included: 1. Insert the endoscope through the human mouth until the endoscope sees the major duodenal papilla (the opening of the common bile duct); 2. Insert the second guide wire along the endoscope. Under the observation of the endoscope, insert the second guide wire into the major papilla of the duodenum and insert it into the pancreatic duct through the common bile duct under X-ray. 3. Insert the first guide wire along the endoscope, and insert it into the major papilla of the duodenum under the observation of the endoscope, and then insert it into the common bile duct under X-ray; 4. Place a second stent 2 on the second guide wire inserted into the pancreatic duct; 5. The first stent 1 is sheathed on the first guide wire inserted into the bile duct, and the auxiliary tube 10 of the first stent 1 is sheathed on the second guide wire; 6. Under endoscope observation, use the auxiliary tube 10 of the first stent 1 to push the second stent 2, so as to drive the second stent 2 into the common bile duct through the major papilla of the duodenum; 7. Under X-ray observation, use the auxiliary tube 10 of the first stent 1 to push the second stent 2, so that the second stent 2 enters the pancreatic duct along the second guide wire; 8. Pull out the second guide wire inserted into the second stent 2; 9. Under X-ray observation, continue to push the first stent 1 so that the first stent 1 continues to extend into the common bile duct along the first guide wire.
[0041] When the first bracket 1 and the second bracket 2 need to be removed, the end of the first bracket 1 outside the human body is directly pulled, and the lead wire 3 can be used to drive the second bracket 2 to leave the human body together. Embodiment 4:
[0042] like Figure 1-3 As shown, the difference between this embodiment and the third embodiment is that: The distal end of the first stent 1 and the proximal end of the second stent 2 are both provided with an auxiliary structure 20; The two attachment structures 20 are looped wires that can be connected to each other.
[0043] Apart from this, the remaining features are the same as those of the third embodiment.
[0044] By using the looped wire as the auxiliary structure 20, when the second stent 2 is used alone, the looped wire on the second stent 2 can be used as a component for the foreign body forceps on the endoscope to grasp when the second stent 2 is pulled out, so as to facilitate the pulling out of the second stent 2; At the same time, when the first stent 1 and the second stent 2 are used together and need to be pulled out together during the subsequent removal process, the annular silk thread on the first stent 1 and the annular silk thread on the second stent 2 can be connected together before the first stent 1 and the second stent 2 are placed into the human body to achieve the connection between the first stent 1 and the second stent 2. Then, when it is necessary to pull out the first stent 1 and the second stent 2 completely, the first stent 1 can be directly pulled to drive the second stent 2 out of the pancreatic duct through the connection of the two annular silk threads, thereby saving operation time and having strong practicality. Embodiment five:
[0045] like Figure 2 As shown, the difference between this embodiment and the third embodiment is that: The second bracket 2 is in the shape of a straight tube, and outer walls at both ends of the second bracket 2 are provided with side wings 21 .
[0046] Apart from this, the remaining features are the same as those of the third embodiment.
[0047] The side wings 21 at both ends form support for the second stent 2 in a straight tube shape in the pancreatic duct, thereby reducing the possibility of the second stent 2 falling off from the pancreatic duct, and having strong practicality. Embodiment six:
[0048] like Figure 3 As shown, the difference between this embodiment and the third embodiment is that: The proximal end of the second bracket 2 is arc-shaped, and the outer wall of the distal end of the second bracket 2 is provided with a side wing 21 .
[0049] Apart from this, the remaining features are the same as those of the third embodiment.
[0050] The side wings 21 support the distal end of the second stent 2 in the pancreatic duct, and the arc-shaped proximal end supports the proximal end of the second stent 2, thereby reducing the possibility of the second stent 2 falling off from the pancreatic duct. The structure is simple and practical. Embodiment seven:
[0051] like Figure 1 and Figure 4 As shown, the difference between this embodiment and the first embodiment is that: The distal end of the first bracket 1 is arc-shaped.
[0052] Apart from this, the remaining features are the same as those of the first embodiment.
[0053] In fact, according to actual conditions, the distal end of the first stent 1 can be set as a straight tube, and a side wing 21 can be provided at the distal end to form a support between the first stent 1 and the bile duct. In this embodiment, the arc-shaped distal end supports the first stent 1 in the bile duct, thereby reducing the possibility of the first stent 1 falling off from the bile duct. The structure is simple and the practicability is strong.
[0054] The above is a detailed introduction to a pancreatic and biliary stent provided by the present invention. The description of the specific embodiment is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims
1. A pancreaticobiliary stent, characterized in that: It comprises a first stent (1) for being sleeved on a first guide wire; The first stent (1) is used to be inserted into the bile duct under the guidance of a first guide wire; An auxiliary tube (10) sleeved on the second guide wire is fixedly provided on the outer side of the distal end of the first stent (1), and the auxiliary tube (10) is used to push the second stent (2) sleeved on the second guide wire to be inserted into the pancreatic duct.
2. A pancreaticobiliary stent, characterized in that: It comprises a second stent (2), wherein the second stent (2) is used for inserting into the pancreatic duct under the guidance of a second guide wire; The proximal end of the second stent (2) is provided with an accessory structure (20) for being grasped, and the tail of the accessory structure (20) is located outside the major duodenal papilla.
3. A pancreaticobiliary stent according to claim 2, characterized in that: The auxiliary structure (20) is a ring-shaped thread, and a radial hole is opened at the proximal end of the second stent (2), and the ring-shaped thread is inserted into the radial hole.
4. A pancreaticobiliary stent, characterized in that: include: A first stent (1), the first stent (1) being sleeved on a first guide wire and used for being inserted into the bile duct under the guidance of the first guide wire; A second stent (2), the second stent (2) being sleeved on the second guide wire and used for being inserted into the pancreatic duct under the guidance of the second guide wire; An auxiliary tube (10) sleeved on the second guide wire is fixedly provided on the outer side of the distal end of the first stent (1), and the auxiliary tube (10) is used to push the second stent (2) into the pancreatic duct.
5. A pancreaticobiliary stent according to claim 4, characterized in that: A lead wire (3) is connected between the distal end of the first stent (1) and the proximal end of the second stent (2).
6. A pancreaticobiliary stent according to claim 4, characterized in that: The distal end of the first stent (1) and the proximal end of the second stent (2) are both provided with an auxiliary structure (20); The two auxiliary structures (20) are looped threads that can be connected to each other.
7. A pancreaticobiliary stent according to any one of claims 2 to 6, characterized in that: The second bracket (2) is in the shape of a straight tube, and the outer walls at both ends of the second bracket (2) are provided with side wings (21).
8. A pancreaticobiliary stent according to any one of claims 2 to 6, characterized in that: The proximal end of the second bracket (2) is arc-shaped, and the distal outer wall of the second bracket (2) is provided with a side wing (21).
9. A pancreaticobiliary stent according to any one of claims 1 and 4-6, characterized in that: The distal end of the first bracket (1) is arc-shaped.