82 results about "Pancreatic duct" patented technology

The invention provides application of lactic acid modified histone H3 in preparation of drugs and / or diagnostic kits for preventing and / or treating pancreatic ductal adenocarcinoma, and belongs to the technical field of disease diagnosis and / or treatment. The invention provides application of a lactic acid modified histone H3 as a target spot in preparation of a pancreatic ductal adenocarcinoma diagnostic kit or a medicine for preventing and / or treating pancreatic ductal adenocarcinoma. The site of lactic acid modification is 23-site lysine. The expression of H3K23la detected in clinical sample tissues in pancreatic ductal adenocarcinoma tumor tissues is obviously higher than that in para-carcinoma normal tissues, overexpression and non-expression of H3K23la in cells are regulated and controlled through in-vitro experiments in combination with overexpression and knock-down technologies, and results show that proliferation, invasion and migration capacities of pancreatic ductal adenocarcinoma cells are remarkably inhibited, so that the pancreatic ductal adenocarcinoma cells are remarkably inhibited. Therefore, the H3K23la can be used as a target spot for diagnosis and treatment of the pancreatic duct adenocarcinoma, and has wide application in diagnosis or treatment of the pancreatic duct adenocarcinoma.

The invention discloses a self-breaking outer drainage tube, and relates to the technical field of medical instruments, the self-breaking outer drainage tube comprises a tube body, and the tube body comprises a drainage part, a breaking part, a leading-out part and a puncture part; the drainage part and the fracture part are both made of degradable materials; the hole wall thickness of the circulation hole at the fracture part is smaller than the hole wall thickness of the circulation hole at the drainage part; during surgical operation, the degradable inner drainage part is placed in the pancreatic duct, the fracture part crosses the anastomotic stoma by 7-8 cm and crosses the biliary-intestinal anastomotic stoma, and the leading-out part walks in the enteric cavity to a proper position, penetrates out of the intestinal wall and is led out of the body through the abdominal wall. Cutting the puncture part to expose the outlet of the circulation hole, and discharging the body fluid through the circulation hole; after a certain period of time after the operation, the fracture part is automatically fractured under the action of pancreatic juice, the leading-out part is pulled out, the degradable drainage part continues to be degraded in the body and maintains the drainage function, and finally the drainage part is absorbed by the body or discharged out of the body without being taken out through the operation.

The utility model discloses a pancreatic duct support drainage tube for pancreatic surgery, and relates to the technical field of drainage tubes, the pancreatic duct support drainage tube comprises a drainage tube body and an insertion port, two rollers are arranged outside the drainage tube body, one of the rollers is rotatably connected with a handrail, the other roller is rotatably connected with a U-shaped column, and the U-shaped column is connected with the insertion port. The rolling wheels are attached to the outer wall of the drainage tube body, two connecting columns are fixedly connected to the sides, close to the rolling wheels, of the handrails, and extrusion pieces are arranged between the U-shaped columns and the ends of the connecting columns. The rolling wheels, the handrail, the U-shaped column, the connecting column and the like are arranged outside the drainage tube body, and the extrusion part is arranged between the U-shaped column and the connecting column, so that when blockage occurs in the drainage tube body, blockages in the drainage tube body can be quickly extruded out, the operation is convenient, the efficiency is higher, and the risk that the infection of a patient is increased due to the fact that drainage liquid is smooth and inconvenient is avoided.

The utility model discloses a pancreaticobiliary internal drainage tube with selectable indwelling periods, and belongs to the technical field of medical drainage tubes. The drainage tube comprises a drainage tube section and a drainage section which are connected into a whole, drainage holes are formed in the drainage tube section and the drainage section, and the drainage tube is characterized in that one end of the drainage tube section is a catheter section, the other end of the drainage tube section is a spiral or pigtail-shaped or D-shaped first fixing ring, and the drainage holes are formed in the first fixing ring; the drainage section is connected with the catheter section of the drainage tube section and is integrally S-shaped, and at least two S-shaped bent parts are arranged; a plurality of first inner supporting strips which are arranged in the length direction of the drainage tube section and protrude towards the inner side of the tube are arranged on the inner wall of the drainage tube section, and a plurality of first outer supporting strips which are arranged in the length direction of the drainage tube section and protrude towards the outer side of the tube are arranged on the outer wall of the drainage tube section. The guide wire can be prevented from entering the common bile duct / main pancreatic duct by mistake, the indwelling time is flexible and controllable, and catheter indwelling and automatic falling are facilitated.

The invention discloses a small anastomat based on an electromagnetic system. The small anastomat comprises an anastomat main body, an electromagnetic adjusting device, a fixed sleeve and a magnetic ball, the anastomat body comprises a bearing tube and a handle, the handle is fixedly installed at the lower end of the bearing tube, the fixed sleeve is fixedly installed at the front end of the bearing tube, and the electromagnetic adjusting device is installed in the rear end of the bearing tube; the magnetic ball is fixedly and detachably mounted in the fixed sleeve; through the interaction of the magnetic ball and the hard metal sleeve (the metal sleeve is electrified), the pancreatic duct (or bile duct) after broken end ligation can be smoothly sucked in, and then the thermal electrode and the cutting knife which are arranged in the fixed sleeve are used for cutting and anastomosing the intestinal wall and the pancreatic duct (or bile duct), so that the anastomosing effect is achieved; according to the anastomat, anastomosis can be carried out through mutual cooperation of the small magnetic ball and the hard metal sleeve, and after the small metal ball is attracted in a magnetic mode, corresponding tissue is cut off in a mechanical or electric heating cutting mode and then anastomosis is carried out.

The utility model discloses a culture device for inducing differentiation of pancreatic duct stem cells, and relates to the technical field of culture devices. The culture device for inducing pancreatic duct stem cell differentiation comprises a culture box main body, the culture box main body is internally provided with a culture device, the culture device comprises a culture solution adding unit and an observation unit, the culture solution adding unit comprises a placing disc, a culture dish is arranged on the placing disc, and a movable track is arranged on the placing disc; embedded seats are symmetrically arranged in the movable track, a communicating plate is arranged at the embedded groove in each embedded seat, and a U-shaped pipe is arranged on each communicating plate. According to the utility model, on the basis that the placing disc does not rotate, the embedding seat in the movable track does circular motion to finish adding, so that the placing disc is not subjected to direct driving force, the culture dishes on the placing disc are not subjected to centrifugal force and the like, and the culture solution in the culture dishes is promoted to be stable; and the limiting grooves formed in the placement disc further ensure stable placement of the culture dishes.

A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain a medical image related to the pancreas. The processing circuitry is configured to extract a pancreas region included in the medical image. The processing circuitry is configured to extract at least one tubular structure region from the inside of the pancreas region. The processing circuitry is configured to identify a first end part and a second end part related to the pancreas on the basis of the pancreas region. The processing circuitry is configured to estimate a primary pancreatic duct centerline of the pancreas on the basis of the tubular structure region, the first end part, and the second end part.

The present invention discloses an insertion component and an endoscope, and relates to the technical field of medical devices. The insertion component includes: an outer catheter and an inner catheter. The outer catheter includes a connecting portion and a toggle portion that are connected to each other, and the inner diameter of the toggle portion is smaller than the inner diameter of the connecting portion. The inner catheter is slidably embedded in the interior of the outer catheter, and can selectively extend out of the toggle portion. The distal diameter of the inner catheter is larger than the inner diameter of the toggle portion, so that the inner diameter and / or outer diameter of the toggle portion can be enlarged when the inner catheter extends out of the toggle portion. Since the toggle portion of the insertion component will abut against the duodenal papilla during use, the inner diameter and / or outer diameter of the toggle portion can drive the duodenal papilla to expand after the inner diameter and / or outer diameter of the toggle portion is enlarged, and the insertion component can be quickly and accurately extended into the common bile duct or the common pancreatic duct. The endoscope using the above-mentioned insertion component can enable the doctor to accurately or quickly extend the endoscope into the common bile duct or the common pancreatic duct.

Medical devices and systems for treating a stricture, for example along the biliary and / or pancreatic tract, are disclosed. An example system may include a guidewire having a distal end and defining a lumen. A stiffening rod may be slidably disposed within the lumen. The stiffening rod may have a distal end and a distal end region disposed adjacent to the distal end. The stiffening rod may be configured to shift between a first position where the distal end of the stiffening rod is disposed proximally of the distal end of the guidewire and a second position where the distal end of the stiffening rod is disposed distally of the distal end of the guidewire.

The invention provides a double-guide-wire nipple sphincter incision knife which comprises an outer sheath tube, a handle, a first guide wire, a second guide wire and a metal wire, and the first guide wire is inserted into the outer sheath tube through the tube wall of the outer sheath tube and penetrates out of the tube wall of the outer sheath tube; the handle is connected with the tail end of the outer sheath tube, and the second guide wire is inserted into the outer sheath tube through the handle and penetrates out of the head end of the outer sheath tube. One end of the metal wire is fixedly connected to the tube wall of the outer sheath tube, and the other end of the metal wire is inserted into the outer sheath tube and connected with the handle. During use, an assistant can implement the guide wire to assist the nipple sphincter incision knife in intubation into the pancreatic duct, an operator can operate the second guide wire to enter the common bile duct through intubation on the side wall of the duct wall on the basis that the duct diameter of the nipple incision knife is not increased, double-person multi-angle intubation is achieved, and the bile duct intubation success rate is increased.

The invention relates to a preparation for promoting in-vitro proliferation of pancreatic stem cells and application of the preparation. A nucleotide sequence of a miR-802 inhibitor comprises a sequence as shown in SEQ ID No. 1. According to the composition containing the miR-802 inhibitor, the in-vitro proliferation capacity of pancreatic stem cells is remarkably improved, and the capacity of pancreatic duct cells for forming pancreatic stem cell colonies is remarkably improved. Experiments prove that the miR-802 inhibitor has the functions of promoting dry gene expression and inhibiting endocrine differentiation gene expression in pancreatic stem cells cultured in vitro.

To provide a device for an endoscope improved in insertability when inserting a treatment instrument into a biliopancreatic duct.SOLUTION: An endoscopic device includes a sheath extending in a longitudinal direction, a treatment tool opening portion communicating with a treatment tool lumen through which the sheath is inserted in the longitudinal direction and configured to allow a treatment tool inserted through the treatment tool lumen to protrude and retract to and from a distal end side of the sheath in the longitudinal direction, and a suction opening portion communicating with a suction lumen through which the sheath is inserted in the longitudinal direction.SELECTED DRAWING: Figure 3

The utility model belongs to the technical field of drainage tubes, and particularly relates to a pancreatic duct supporting drainage tube for pancreatic surgery, which comprises a drainage main tube and a sleeve, one end of the drainage main tube is detachably connected with the sleeve through a first connecting component, a supporting component is arranged in the drainage main tube, a fixing component is arranged on the sleeve, and the fixing component is detachably connected with the sleeve through a second connecting component. The fixing assembly and the supporting assembly are detachably connected together through the second connecting assembly. The first connecting assembly comprises a first annular plate, the first annular plate is fixedly installed at one end of the drainage main pipe, and a first annular groove is formed in the left side of the sleeve. The supporting assembly is arranged in the drainage main pipe, and the fixing assembly is arranged on the sleeve, so that when the pancreas surgery is carried out, the drainage main pipe can be prevented from being flattened, the position of the sleeve can be fixed, and the situation that the drainage main pipe is blocked due to extrusion can be avoided.

The invention belongs to the field of biomedical materials, and particularly relates to an inner drainage end-by-end reducer tube based on the electrostatic spinning technology and a preparation method thereof.The inner drainage end-by-end reducer tube comprises an end-by-end reducing drainage tube, the whole drainage tube is of a hollow conical tubular structure, and the surface of the drainage tube is provided with regularly-arranged thread structures; the invention further provides a preparation method of the inner drainage end-by-end reducer pipe. The defects of existing internal drainage are overcome, and the natural anatomical form of the pancreatic duct is complied with by means of the drainage tube with the diameter changed end by end; the drainage tube is provided with a surface thread structure, and by matching with the swelling characteristic of a biodegradable material, the friction force between the drainage tube and the pancreatic duct wall is increased, and the probability of displacement of the drainage tube due to intestinal tract movement or pancreatic juice scouring is reduced.

This invention provides a single-operated duodenal sphincter cutter, comprising: an outer sheath, a guidewire, a metal wire, and a handle. The guidewire is inserted into the interior of the outer sheath through its wall and exits from its tip. The handle is connected to the tail of the outer sheath. One end of the metal wire is fixedly connected to the front of the outer sheath, and the other end is inserted into the interior of the outer sheath and connected to the handle. This invention features a dual-channel tube, with the guidewire entering the guidewire channel through the side wall. Its outer diameter is thinner than that of a conventional three-channel tube. The guidewire is led out through the side wall of the tube. With the outer sheath fixed in place, the operator can insert the guidewire into the common bile duct or pancreatic duct without the assistance of an assistant, increasing the success rate of cannulation.

Biomarkers, systems, and methods for predicting a prognostic outcome of pancreatic duct adenocarcinoma (PDAC) and responsiveness of a cancer patient to a PARP inhibitor are provided. The metabolites biomarkers are used to predicting a prognostic outcome of PDAC, and includes one or more of LysoPC (14: 0), LysoPC (18: 2), LysoPC (18: 1), Androsterone sulfate, alpha-CEHC, Glycodeoxycholic acid sulfate, LysoPC (20: 5), LysoPE (22: 5), and LysoPE (16: 1). The gene biomarkers are used to identify cancer patients responsive to a PARP inhibitor, and includes one or more of CTNND1, THRAP3, BRAF, STAT5B, and EXT2.

The invention discloses a conical endoscope, and belongs to the technical field of medical instruments. Comprising an endoscope body, an incision knife assembly, a guide wire assembly and an expandable assembly, the endoscope body is of a conical design, the endoscope body is made of a polyurethane material, the length of the endoscope body is 2200 mm, and the diameter of the endoscope body is 8 mm; according to the conical endoscope, by means of the targeted structural design, the adaptability and operation convenience of clinical operations are remarkably improved. The endoscope has the core advantages that the combined design of the conical endoscope body and the inclined axis is adopted, and the frustum-shaped structure at the front end of the endoscope is matched with the 45-degree or 60-degree adjustable central axis, so that the endoscope can accurately adapt to the anatomical trend of narrow cavities such as human biliopancreatic ducts and the like, and compared with a traditional straight-tube endoscope, the endoscope can enter a target part more easily and smoothly, and mechanical damage to mucous membranes of the cavities is reduced. The adaptive capacity is further enhanced through the modular design of the expandable assembly, and the diameter adjustment of the four or more evenly-distributed annular protrusions is achieved through the expansion control device.

[Problem] To provide: a cannula that can be easily inserted into a common bile duct or a pancreatic duct via a major duodenal papilla; and an endoscopic system provided with such a cannula. [Solution] A second camera 30 of a cannula 12 captures an image of the entrance of a common bile duct or a pancreatic duct in a state where the second camera 30 is inserted from the opening of a major duodenal papilla. A transparent shield 124 provides a cavity around the second camera 30 and ensures a field of view Vf of the second camera 30 in a state where the transparent shield 124 is inserted from the opening. The shield 124 has a convex surface 124c around the central axis CA of the field of view Vf of the second camera 30. The portion having the convex surface 124c has a uniform thickness. A guide wire 15 is configured to advance within the field of view Vf of the second camera 30.

The utility model provides a double-channel biliopancreatic pressure measuring catheter which comprises a catheter section I, a catheter section II, a catheter section III and a catheter section IV, a first guide wire channel is arranged in the catheter section I, the catheter section I is connected with the catheter section II, and a second guide wire channel and a first data transmission line channel are arranged in the catheter section II; the front end of the catheter section II is wrapped with a metal tube, the metal tube is provided with an open groove, and a pressure sensor is arranged in the open groove; the catheter section III and the catheter section IV are connected with the catheter section II, and a second data transmission line channel and a third guide wire channel are arranged in the catheter section III and the catheter section IV respectively; the tail of the catheter section III is provided with a pressure sensor connector, and the tail of the catheter section IV is provided with a guide wire connector. The pressure measuring device can be placed into duodenal papilla sphincter, common bile duct and pancreatic duct through a duodenoscope and a gastroscope forceps channel under the guide of a guide wire to measure the pressure in the duodenal papilla sphincter, the common bile duct and the pancreatic duct.

The invention discloses a covered stent for pancreatic-intestinal anastomosis and a manufacturing method of the covered stent. The covered stent comprises a self-expanding stent body which is columnar after being expanded, one end of the self-expanding stent body is a stent pancreas end, a stent jejunum end which protrudes outwards after being expanded is arranged at the position, close to the end, of the other end of the self-expanding stent body, and a membranous material layer for preventing pancreatic juice from leaking is arranged on the surface of the self-expanding stent body; the side, close to the pancreatic end of the stent, of the self-expansion stent body is provided with an annular piece. By adopting the covered stent, the contact stability of the self-expansion stent body and the inner wall of the pancreatic duct can be improved, the use stability of the covered stent is improved, and the pancreatic fistula risk is reduced.

The present invention relates to a visualization catheter for minimally invasive interventional surgery of the pancreatic and bile ducts, comprising a catheter body and a traction wire as an incision knife, wherein the distal end of the catheter body can be bent, turned and rotated under the action of the traction wire to change the insertion direction and angle, and the catheter body is provided with a visual lumen and a working lumen, wherein the visual lumen is provided with a micro video image sensor and an illumination element at the distal end of the catheter body, and the distal end of the catheter body is also provided with a transparent cap for ensuring the field of view and increasing the field of view angle of the camera module. The present invention, through the support of the micro video image sensor and the transparent cap, is helpful for finding the lumen and determining its running direction, accurately guiding intubation and related diagnosis and treatment, can perform intubation under direct vision, can distinguish the pancreatic duct and the bile duct by observing the image, reduces or avoids the time of exposure of the operating physician and the patient to radiation, can improve the success rate of selective intubation, and reduces the occurrence of complications.

The invention belongs to the field of pancreatic duct adenocarcinoma prediction, and provides a pancreatic duct adenocarcinoma prediction method and system based on oral flora. The pancreatic ductal adenocarcinoma prediction method based on oral flora comprises the following steps: acquiring relative abundance information of each biomarker in a potential biomarker set for diagnosing pancreatic ductal adenocarcinoma of a to-be-detected person; using the relative abundance information of each biomarker in the biomarker set and a pre-trained multivariate statistical model to obtain a probability value of suffering from pancreatic ductal adenocarcinoma; the method comprises the following steps: performing microbiome difference analysis on saliva, duodenal juice and pancreatic tissue samples of a pancreatic ductal adenocarcinoma patient group and a pancreatic benign disease patient group, and taking an intersection of differential bacteria in the samples to obtain a potential biomarker set for diagnosing the pancreatic ductal adenocarcinoma.

The utility model belongs to the field of lithotripsy devices, and particularly relates to a device for removing bile and pancreatic duct lithotripsy under an endoscope, which comprises a catheter and a handle, a support tube is fixedly connected inside the catheter, and a capillary tube is fixedly connected at one end of the support tube outside the catheter. A driving ring is fixedly connected to the end, away from the supporting tube, of the capillary tube, a guide wire is slidably connected to the interior of the supporting tube, an ultrasonic vibration head is fixedly connected to the end, away from the driving ring, of the guide wire, and a frame is fixedly connected to the upper end of the handle. The guide wire, the ultrasonic vibration head, the capillary tube and other structures are additionally arranged on the catheter, when calculus in the bile duct needs to be removed, the calculus in the bile duct can be shattered and refined through the ultrasonic vibration head, then the capillary tube is inserted into the rear portion of the calculus, and the calculus in the bile duct can be removed. And then the calculus is taken out from the interior of the bile duct through the deformed and expanded capillary tube, so that the calculus can be taken out more conveniently.

Medical devices and method for making and using the same are disclosed. An example medical device may include implantable medical device for use along the biliary and / or pancreatic tract. The implantable medical device may include a tubular member having a first end configured to be disposed within the duodenum of a patient and a second end configured to be disposed adjacent to a pancreatic duct and / or bile duct. The tubular member may have a body including one or more wire filaments that are woven together. The tubular member may also have an outer surface with a longitudinal channel formed therein.

The invention discloses an application of miR-100 sponge in preparation of a medicine for treating type 2 diabetes mellitus. The miR-100 sponge can inhibit miR-100 in a targeted manner and close the expression of miR-100 in beta cells. The nucleic acid construct is further prepared from the nucleic acid construct, AAV8-mmu-miR-100 Sponge (AAV-Sponge) is injected into pancreatic ducts of obese diabetes mellitus mice, after treatment is conducted for 4 weeks, it is found that the sugar tolerance of the mice in a treatment group is improved, the GSIS function of beta cells is improved, and the nucleic acid construct is expected to be further applied to preparation of the medicine for treating the type 2 diabetes mellitus. The problems that current treatment methods for type 2 diabetes mellitus are deficient and the treatment cost is high are solved.

To provide a device for removing stones or calculi from a biliary tract and a pancreatic duct with an endoscope.SOLUTION: A device for endoscopically removing stones or calculi from a biliary tract and a pancreatic duct includes: a control wire being guided in a tube; a control element for axially moving the control wire in the tube, fixed to a proximal end of the control wire; and a catch basket composed of basket wires, fixed to a distal end of the control wire. The catch basket expands or contracts into a loop by axial movement of the control wire by the control element. The purpose thereof is to create advantageous possibilities for handling such a device, when lithotripsy is required. The control wire is separable from the control element and can be coupled to an actuating element for the lithotripsy of a stone contained by the catch basket, where the actuating element can be used to generate sufficient force on the catch basket.SELECTED DRAWING: Figure 6

Systems and methods for treating, for example, strictures along a biliary tract and / or pancreatic duct are disclosed. An example system can include a handle (14) having a base, a first carriage (26) translatable relative to the base, and a second carriage (24) translatable relative to the base. A sheath (16) can be coupled to the first carriage. The system can also include a catheter shaft (12) having a proximal region and a steerable distal region. The proximal region can be coupled to the second carriage. A needle can be releasably coupled to the handle. The needle can be configured to pass through tissue to a location along a biliary tract and / or pancreatic duct. The system can also include a steering member (44) having a first end coupled to the steerable distal region of the catheter shaft and a second end disposed adjacent the handle.

The invention relates to the technical field of medical instruments, in particular to a liver, gall, pancreas and spleen catheter fixing device which comprises a base, a plurality of containing cavities are formed in the side portion of the base, a plurality of external flaring openings corresponding to the containing cavities are fixed to the top of the base, a clamp is arranged on the upper side of the base, and the base and the clamp are connected through a telescopic rod. An interlayer is arranged between each containing cavity and the outer flaring, a set of fixing mechanism and a self-locking mechanism are arranged in each interlayer, the fixing mechanisms are used for fixing the tail ends of the catheters, and a guide mechanism is arranged on the telescopic rod; movement and compression of the drainage tube in the body of a patient are reduced, discomfort of the patient is reduced, orderly connection of the catheters is ensured, mutual interference of the catheters is reduced, blockage caused by excessive bending of the catheters is prevented, smooth flowing of liquid in the catheters is ensured, and the treatment effect is guaranteed.

The utility model relates to the technical field of medical instruments, and discloses a duodenal papilla incision knife tube structure and an incision knife, the knife tube structure comprises a sheath tube assembly and a head assembly which are fixedly connected; the sheathing canal assembly comprises a sheathing canal body, an injection cavity, a shredding cavity and at least two guide wire cavities which axially penetrate through the sheathing canal body are formed in the sheathing canal body, and an injection inlet communicated with the injection cavity and a guide wire inlet communicated with each guide wire cavity are formed in the sheathing canal body; the head assembly comprises a bendable head tube, and the head tube is provided with an injection outlet communicated with the injection cavity, a shredding outlet communicated with the shredding cavity and a wire guide outlet communicated with each wire guide cavity. According to the utility model, while the injection function and the cutting function are realized, the simultaneous intubation of the bile duct and the pancreatic duct can be realized during the first intubation, or the simultaneous guide wire guiding of the right hepatic duct and the left hepatic duct can be realized, so that the operation time is shortened, and the occurrence rate of ERCP complications is reduced.

The utility model relates to medical instrument technical field especially, and it is a kind of covered stent and implantation system.This covered stent includes support framework and film, wherein: support framework is the hollowed out cylinder structure of peripheral surface, it can be radially compressed and expand;Film is coated on part support framework, and drainage mesh is formed at the region of support framework not being coated by film.Due to film being coated on part support framework, drainage mesh is formed at the region of support framework not being coated by film, bile of gallbladder, bile in common hepatic duct and pancreatic juice in pancreatic duct can enter the inside of covered stent through drainage mesh and reach duodenal papilla, thereby avoiding the phenomenon that bile and pancreatic juice cannot flow out from common bile duct and reach duodenal papilla due to common bile duct being pressed by stent, and simultaneously, a plastic stent does not need to be additionally implanted in common bile duct to help common bile duct drainage, to achieve the purpose of reducing operation cost and operation complexity.