Endoscopic retrograde implantation of Y-type biliary stent via duodenal papilla

Abstract

The present invention relates to the field of medical devices, and specifically to a Y-type biliary stent endoscopic transduodenal papilla retrograde implantation device, comprising: an endoscope tube, an outer sleeve, and various catheters and guide wires inside the outer sleeve. When in use, the braided wires of the two Y-type stent branches are respectively sleeved on the guide wire sleeve, so that the tightening soft sleeve can wrap and tighten the Y-type stent branch after being folded in half inward. When the main road of the Y-type stent is released, the double-lumen catheter pushes the double-lumen catheter to push the main road of the Y-type stent out of the outer sleeve. The outer sleeve and various catheters and guide wires inside the outer sleeve are sleeved inside the main cavity opening at the lower end of the endoscope tube, and the various catheters and guide wires are clamped and connected with their corresponding traction tubes respectively. Through the various ends on the endoscope tube, the traction tube is controlled to push and pull the various catheters at the lower end of the endoscope tube under the guiding action of the various catheter sliding sleeves, and the Y-type stent is transported to the left and right hepatic ducts of the liver in cooperation with the lateral extension hole, which is simple, convenient and practical.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a Y-shaped biliary stent endoscopically implanted retrogradely through the duodenal papilla. Background Art

[0002] Hilar cholangiocarcinoma refers to cancer that occurs in the left hepatic duct, right hepatic duct, bifurcation of the left and right hepatic ducts, and the upper part of the common hepatic duct. Klaskin described the clinical characteristics of this type of tumor in detail in 1965, so it is often called Klaskin tumor. It is reported that Klaskin tumor accounts for about 58% to 75% of extrahepatic bile duct cancer. Because the tumor grows in a hidden location, early diagnosis is extremely difficult and it is often misdiagnosed as infectious hepatitis. Most patients seek medical treatment with progressive jaundice and weight loss as the main clinical manifestations, and most patients are in the late stage when they seek medical treatment. At present, the treatment methods for malignant hilar biliary obstruction are limited. Surgical radical or extended resection is the only curative treatment method. However, due to factors such as deep tumor location, complex surrounding anatomy, and tumor infiltration, patients lose the opportunity for surgical radical resection. The overall surgical resection rate of the tumor is still low, and sometimes even palliative biliary-enteric anastomosis cannot be performed. Even with surgery, the chances of postoperative liver failure and tumor recurrence are still high, the long-term effect is not ideal, and the 5-year survival rate is less than 5%.

[0003] ERCP stands for endoscopic retrograde pancreatography. It is an imaging technique that uses contrast media to retrogradely display the pancreatic and bile ducts by cannulating the duodenal papilla under endoscopy. It is currently the gold standard for clinical diagnosis and treatment of pancreatic and bile duct diseases such as common bile duct stones and obstructive jaundice. On the basis of ERCP, interventional treatments such as duodenal papilla sphincterotomy, endoscopic nasobiliary drainage, and endoscopic bile internal drainage can be performed. ERCP treatment indications include: 1. Obstructive jaundice of unknown cause; 2. Patients suspected of having malignant tumors of the pancreas, gallbladder, and ampulla; 3. Biliary pancreatitis; 4. Primary pancreatitis of unknown cause; 5. Patients with recurrent right upper abdominal pain after cholecystectomy; 6. Patients with bile duct infection and bile duct obstruction who need nasobiliary drainage; 7. Patients with internal stent drainage to reduce jaundice in malignant tumors.

[0004] Endoscopic retrograde pancreatocholangiopancreatography is to insert a fiber duodenoscope into the descending part of the duodenum, find the duodenal papilla (hereinafter referred to as the papilla), insert a plastic catheter from the biopsy channel to the papilla opening, inject contrast agent and then take an X-ray to show the pancreatic and bile ducts. This method was first reported by McCunne in 1968, and later improved by Ooi et al. In the past decade, with the continuous advancement of instruments and intubation technology, the success rate of ERCP has increased year by year, and currently has reached about 90%, becoming an important means of diagnosing pancreatic and biliary diseases.

[0005] For patients with bile duct obstruction that cannot be surgically removed, biliary stent implantation is the first choice for non-surgical palliative treatment. After stent implantation, the patient's symptoms such as jaundice, pain, and itching can be quickly relieved, and cholangitis and cholestatic liver failure can be prevented and treated. Since the tumor invades the trifurcated structure of the bilateral bile duct and the common bile duct, in order to achieve the placement of the Y-shaped stent structure, the back-to-back technique (side by side) or stent in stent technique (stent in stent) is mainly used at home and abroad to achieve it. The back-to-back technique uses two tubular stents (8mm in diameter) to puncture the left and right bile ducts respectively, and the two are distributed in parallel in the common bile duct. Since the common bile duct is normally 8mm, the interaction between the two stents affects the expansion of the stent, which can easily lead to cholangitis and other conditions. The stent in stent technique is to puncture the bilateral bile ducts separately, and one stent passes through the mesh of the other stent, and overlaps in the common bile duct to form a Y-shaped structure, but due to the obstruction of the stent wire and other reasons, it is easy to cause restenosis of the stent, and once re-obstruction occurs, subsequent treatment is very difficult. Currently, there are integrated Y-shaped stents on the market, but there is no integrated Y-shaped stent release device. How to place a Y-shaped stent that conforms to the three-fork structure of the portal area into the portal bile duct is still a clinical problem. Summary of the invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a Y-shaped biliary stent endoscopic retrograde implantation device through the duodenal papilla, which is convenient for implanting the Y-shaped stent in the liver.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] The present invention provides a Y-shaped biliary stent endoscopic transduodenal papilla retrograde implantation device, comprising: an endoscope tube, an outer sleeve, an outer sleeve traction tube, an outer sleeve sliding sleeve, a double-lumen catheter, a double-lumen catheter traction tube, a double-lumen catheter sliding sleeve, a first guide wire sleeve, a second guide wire sleeve, a first guide wire sleeve traction tube, a second guide wire sleeve traction tube, a first guide wire sleeve sliding sleeve, a second guide wire sleeve sliding sleeve, a first guide wire, a second guide wire, a first guide wire traction tube, and a second guide wire traction tube;

[0009] The endoscope tube is divided into three sections, namely a solid section, a cavity section, and a solid section; a lateral extension hole is provided at the cavity section of the endoscope tube for facilitating the extension of each guide wire and each catheter; a main lumen and multiple traction lumens are provided on the endoscope tube; an outer sleeve is sleeved in the main lumen in the middle and lower sections of the endoscope tube; an outer sleeve sliding sleeve is sleeved in the main lumen in the upper section of the endoscope tube; the outer sleeve and the outer sleeve sliding sleeve are arranged without contact; an outer sleeve traction tube, a double-lumen catheter traction tube, a first guide wire traction tube, a second guide wire traction tube, a first guide wire traction tube The wire traction tube and the second guide wire traction tube are sleeved in the traction cavity; one end of the outer tube traction tube extends out of one end of the endoscope tube and is connected to the outer tube sliding sleeve, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the outer tube; one end of the outer tube is provided with an outer tube catheter head for clamping the main path of the Y-shaped stent, and the other end is sleeved with a double-lumen catheter; the double-lumen catheter sliding sleeve is sleeved in the outer tube sliding sleeve and extends out of the outer tube sliding sleeve; one end of the double-lumen catheter traction tube extends out of one end of the endoscope tube and is connected to the double-lumen catheter sliding sleeve, and the other end can extend The first guide wire sleeve and the second guide wire sleeve are arranged in the double-lumen catheter and extend out of the double-lumen catheter, and the first guide wire sleeve sliding sleeve and the second guide wire sleeve sliding sleeve are arranged in the double-lumen catheter sliding sleeve and extend out of the double-lumen catheter sliding sleeve; one end of the first guide wire sleeve traction tube extends out of one end of the endoscope tube and is connected to the first guide wire sleeve sliding sleeve, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the first guide wire sleeve; one end of the second guide wire sleeve traction tube extends out of one end of the endoscope tube and is connected to the second guide wire sleeve The first guide wire sleeve is arranged in the first guide wire sleeve and extends out of the first guide wire sleeve, and the second guide wire sleeve is arranged in the second guide wire sleeve and extends out of the second guide wire sleeve; one end of the first guide wire pulling tube extends out of one end of the endoscope tube, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the first guide wire; one end of the second guide wire pulling tube extends out of one end of the endoscope tube, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the second guide wire;

[0010] The ends of the first and second guide wire sleeves facing the upper region of the endoscope tube are provided with tightening soft sleeves which are always in a tightened state. The tightening soft sleeves can tighten the Y-shaped stent branch after the double layers are folded inwards in half.

[0011] Furthermore, a fixed tightening ring is sleeved on the first wire guide sleeve and the second wire guide sleeve, and one end of the tightening soft sleeve is clamped between the fixed tightening ring and the first wire guide sleeve and the second wire guide sleeve.

[0012] Furthermore, a guide wire sleeve catheter head is provided on the end of the first guide wire sleeve and the second guide wire sleeve facing the upper section of the endoscope tube, and a fixed tightening ring is connected to the end of the guide wire sleeve catheter head facing the tightening soft sleeve.

[0013] Furthermore, the guide wire sleeve catheter head is conical and the boundaries are chamfered.

[0014] Furthermore, the outer sleeve catheter head is composed of a plurality of conical pieces distributed circumferentially, and the conical pieces are arranged obliquely toward the axis of the outer sleeve.

[0015] Furthermore, the device also includes a first push-pull head, a second push-pull head, a third push-pull head, and a fourth push-pull head; the first guide wire extends out of the first guide wire sleeve and is connected to the first push-pull head, and the second guide wire extends out of the second guide wire sleeve and is connected to the second push-pull head; one end of the first guide wire traction tube extends out of one end of the endoscope tube and is connected to the third push-pull head, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the first push-pull head; one end of the second guide wire traction tube extends out of one end of the endoscope tube and is connected to the fourth push-pull head, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the second push-pull head.

[0016] Furthermore, the first push-pull head, the second push-pull head, the third push-pull head, and the fourth push-pull head are all in the shape of cylindrical rods.

[0017] Furthermore, the length of the outer sleeve traction tube is longer than the length of the endoscope tube.

[0018] Furthermore, an outer sleeve is provided with an outer sleeve traction end, and an outer sleeve sliding sleeve is provided with an outer sleeve sliding sleeve traction end; one end of the outer sleeve traction tube extends out of one end of the endoscope tube and is connected to the outer sleeve sliding sleeve traction end, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the outer sleeve traction end;

[0019] The double-lumen catheter is provided with a double-lumen catheter traction end, and the double-lumen catheter sliding sleeve is provided with a double-lumen catheter sliding sleeve traction end; one end of the double-lumen catheter traction tube extends out of one end of the endoscope tube and is connected to the double-lumen catheter sliding sleeve traction end, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the double-lumen catheter traction end;

[0020] The first guide wire sleeve is provided with a first guide wire sleeve traction end, the second guide wire sleeve is provided with a second guide wire sleeve traction end, the first guide wire sleeve sliding sleeve is provided with a first guide wire sleeve sliding sleeve traction end, and the second guide wire sleeve sliding sleeve is provided with a second guide wire sleeve sliding sleeve traction end; one end of the first guide wire sleeve traction tube extends out of one end of the endoscope tube and is connected to the first guide wire sleeve sliding sleeve traction end, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the first guide wire sleeve traction end; one end of the second guide wire sleeve traction tube extends out of one end of the endoscope tube and is connected to the second guide wire sleeve sliding sleeve traction end, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the second guide wire sleeve traction end.

[0021] Furthermore, the number of the traction lumens is six, and the six traction lumens are evenly arranged around the circumference of the endoscope tube.

[0022] The Y-type biliary stent endoscopic retrograde implantation device through the duodenal papilla of the present invention, when in use, the braided wires of the two Y-type stent branches are respectively put on the guide wire sleeves on the corresponding sides thereof, so that the tightening soft sleeve can wrap and tighten the Y-type stent branches on the corresponding sides of the entire Y-type stent after being folded in half inward, so that the braided wires of the Y-type stent branches are tightened by the tightening soft sleeve. The braided wires of the Y-type stent branches are put on the outer periphery of the two guide wire sleeves and the main road of the Y-type stent is inserted into the outer sleeve, the outer sleeve has a tightening effect on the braided wires of the main road of the Y-type stent, the front end face of the double-lumen catheter is pressed against the rear port of the main road of the Y-type stent, and when the main road of the Y-type stent needs to be released, the double-lumen catheter is pushed to push the main road of the Y-type stent out of the outer sleeve. An outer sleeve and various catheters and guide wires inside the outer sleeve are sleeved inside the main cavity opening at the lower end of the endoscope tube, and the rear ends of the above-mentioned various catheters and the guide wires are respectively clamped and connected with their corresponding traction tubes, so that the traction tubes can be controlled by various ends at the upper end of the endoscope tube to push and pull various catheters at the lower end of the endoscope tube under the guidance of various catheter sliding sleeves, and the Y-shaped stent can be delivered to the left and right hepatic ducts of the liver in conjunction with the lateral extension hole. It is simple, convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a structural diagram of the upper part of the device for retrograde endoscopic transduodenal papilla implantation of a Y-shaped biliary stent according to the present invention;

[0025] Figure 2 It is a structural diagram of the lower part of the device for retrograde endoscopic transduodenal papilla implantation of a Y-shaped biliary stent according to the present invention;

[0026] Figure 3 It is a structural diagram of a Y-shaped stent branch in a device for retrograde endoscopic transduodenal papilla implantation of a Y-shaped biliary stent according to the present invention when being tightened;

[0027] Figure 4 yes Figure 3 Partial structural diagram of

[0028] Figure 5 It is a structural diagram of a Y-shaped stent branch being released in a Y-shaped biliary stent endoscopically inserted through the duodenal papilla retrograde implantation device of the present invention;

[0029] Figure 6 It is a diagram of the initial state of human organs;

[0030] Figure 7 2 is a structural diagram of the Y-shaped biliary stent endoscopic transduodenal papilla retrograde implantation device during implantation step 2 of the present invention;

[0031] Figure 8 yes Figure 7 A partial structural diagram from one angle;

[0032] Fig. 9 yes Figure 7 Partial structural diagram from another angle;

[0033] Fig.10 yes Figure 8 Partial structural diagram of

[0034] Fig.11 3 is a structural diagram of the Y-shaped biliary stent endoscopic transduodenal papilla retrograde implantation device of the present invention during implantation step 3;

[0035] Fig.12 It is a structural diagram of the Y-shaped biliary stent endoscopic transduodenal papilla retrograde implantation device during implantation step 4 of the present invention;

[0036] Fig.13 4 is a diagram showing the internal structure of the outer sleeve in the device for retrograde endoscopic transduodenal papilla implantation of a Y-shaped biliary stent according to the present invention during implantation step 4;

[0037] Fig.14 1. is a structural diagram of the Y-shaped biliary stent endoscopically inserted through the duodenal papilla in the present invention in the implantation step 5;

[0038] Fig.15 It is a structural diagram of the outer sleeve in the device for retrograde endoscopic transduodenal papilla implantation of a Y-shaped biliary stent according to the present invention during implantation step 5;

[0039] Fig.16 2. It is a structural diagram of the Y-shaped biliary stent endoscopically inserted through the duodenal papilla in the present invention in the implantation step 6;

[0040] Fig.17 It is a structural diagram of a state of the Y-shaped biliary stent endoscopic transduodenal papilla retrograde implantation device in the implantation step 7 of the present invention;

[0041] Fig.18 It is a structural diagram of another state of the Y-shaped biliary stent endoscopic transduodenal papilla retrograde implantation device of the present invention during implantation step 7;

[0042] Fig.19 It is a structural diagram of the Y-shaped biliary stent endoscopic transduodenal papilla retrograde implantation device of the present invention during implantation step 8;

[0043] The accompanying drawings are marked as follows: 1. endoscope tube; 2. outer sleeve; 3. outer sleeve traction tube; 4. outer sleeve sliding sleeve; 5. double-lumen catheter; 6. double-lumen catheter traction tube; 7. double-lumen catheter sliding sleeve; 8. first guide wire sleeve; 9. second guide wire sleeve; 10. first guide wire sleeve traction tube; 11. second guide wire sleeve traction tube; 12. first guide wire sleeve sliding sleeve; 13. second guide wire sleeve sliding sleeve; 14. first guide wire; 15. second guide wire; 16. first guide wire traction tube; 17. second guide wire traction tube; 18. lateral extension hole; 19. tightening soft sleeve; 20. fixed tightening ring; 21. guide wire sleeve catheter head; 22. first push-pull head; 23. second push-pull head; 24. first The third push-pull head; 25, the fourth push-pull head; 26, the outer sleeve traction end; 27, the outer sleeve sliding traction end; 28, the double-lumen catheter traction end; 29, the double-lumen catheter sliding traction end; 30, the first guide wire sleeve traction end; 31, the second guide wire sleeve traction end; 32, the first guide wire sleeve sliding traction end; 33, the second guide wire sleeve sliding traction end; 34, the liver; 35, the left hepatic duct; 36, the right hepatic duct; 37, the common hepatic duct; 38, the gallbladder; 39, the cystic duct; 40, the common bile duct; 41, the pancreas; 42, the esophagus; 43, the stomach; 44, the duodenum; 45, the major duodenal papilla; 46, the Y-shaped stent; 47, the outer sleeve catheter head. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] like Figures 1 to 19 As shown, a Y-shaped biliary stent endoscopic transduodenal papilla retrograde implantation device according to an embodiment of the present invention comprises: an endoscope tube 1, an outer sleeve 2, an outer sleeve traction tube 3, an outer sleeve sliding sleeve 4, a double-lumen catheter 5, a double-lumen catheter traction tube 6, a double-lumen catheter sliding sleeve 7, a first guide wire sleeve 8, a second guide wire sleeve 9, a first guide wire sleeve traction tube 10, a second guide wire sleeve traction tube 11, a first guide wire sleeve sliding sleeve 12, a second guide wire sleeve sliding sleeve 13, a first guide wire 14, a second guide wire 15, a first guide wire traction tube 16, and a second guide wire traction tube 17;

[0046] The endoscope tube 1 is divided into three sections, namely a solid section, a cavity section, and a solid section; a lateral extension hole 18 is provided at the cavity section of the endoscope tube 1 for facilitating the extension of each guide wire and each catheter; a main cavity and multiple traction cavities are provided on the endoscope tube 1; an outer sleeve 2 is sleeved in the main cavity of the middle and lower sections of the endoscope tube 1; an outer sleeve sliding sleeve 4 is sleeved in the main cavity of the upper section of the endoscope tube 1; the outer sleeve 2 and the outer sleeve sliding sleeve 4 are not in contact; an outer sleeve traction tube 3, a double-lumen catheter traction tube 6, a first guide wire sleeve traction tube 10, a second guide wire sleeve traction tube 11, and a first guide wire traction tube 16, the second guide wire traction tube 17 is sleeved in the traction cavity; one end of the outer tube traction tube 3 extends out of one end of the endoscope tube 1 and is connected to the outer tube sliding sleeve 4, and the other end can extend out of the other end of the endoscope tube 1 and is detachably connected to the outer tube 2; one end of the outer tube 2 is provided with an outer tube catheter head 47 for clamping the main path of the Y-shaped bracket 46, and the other end is sleeved with a double-lumen catheter 5; the double-lumen catheter sliding sleeve 7 is sleeved in the outer tube sliding sleeve 4 and extends out of the outer tube sliding sleeve 4; one end of the double-lumen catheter traction tube 6 extends out of one end of the endoscope tube 1 and is connected to the double-lumen catheter sliding sleeve 7, and the other end can extend out of the endoscope The other end of the endoscope tube 1 is detachably connected to the double-lumen catheter 5; the first guide wire sleeve 8 and the second guide wire sleeve 9 are sleeved in the double-lumen catheter 5 and extend out of the double-lumen catheter 5, the first guide wire sleeve sliding sleeve 12 and the second guide wire sleeve sliding sleeve 13 are sleeved in the double-lumen catheter sliding sleeve 7 and extend out of the double-lumen catheter sliding sleeve 7; one end of the first guide wire sleeve traction tube 10 extends out of one end of the endoscope tube 1 and is connected to the first guide wire sleeve sliding sleeve 12, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the first guide wire sleeve 8; one end of the second guide wire sleeve traction tube 11 extends out of one end of the endoscope tube 1 and is connected to the second guide wire sleeve sliding sleeve 13 is connected, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the second guide wire sleeve 9; the first guide wire sleeve 8 is arranged in the first guide wire sleeve 8 and extends out of the first guide wire sleeve 8, and the second guide wire sleeve 9 is arranged in the second guide wire sleeve 9 and extends out of the second guide wire sleeve 9; one end of the first guide wire traction tube 16 extends out of one end of the endoscope tube 1, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the first guide wire 14; one end of the second guide wire traction tube 17 extends out of one end of the endoscope tube 1, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the second guide wire 15;

[0047] The ends of the first guide wire sleeve 8 and the second guide wire sleeve 9 facing the upper region of the endoscope tube 1 are provided with a tightening soft sleeve 19 which is always in a tightened state. The tightening soft sleeve 19 can tighten the branch of the Y-shaped bracket 46 after being folded in half inward.

[0048] The entire endoscope tube 1 is divided into three sections, namely the solid section, the cavity section, and the solid section from the upper end to the lower end. The solid section means that the inner wall of this section of the endoscope tube 1 is solid, and only the corresponding cavities are provided on the corresponding axial paths of the various catheters and traction tubes passing through the inside. The cavity section means that this section of the endoscope tube 1 is a cavity, and a lateral extension hole 18 is opened on the side wall of the cavity section in the middle position of the endoscope tube 1. The lateral extension hole 18 facilitates the guide wire and the outer sleeve 2 and other sleeves to extend laterally from the endoscope tube 1. The corresponding traction tube at the lower end of the endoscope tube 1 can extend from the traction cavity of the lower solid section. When the endoscope tube 1 is passed downward from the patient's esophagus 42, no traction tube extends from the solid section end at the lower end of the endoscope tube 1.

[0049] The Y-shaped biliary stent endoscopic retrograde implantation device through the duodenal papilla of the present invention is used to respectively put the braided wires of the two Y-shaped stent 46 branches on the guide wire sleeves on the corresponding sides thereof, so that the tightening soft sleeve 19 can wrap and tighten the Y-shaped stent 46 branches on the corresponding sides of the entire Y-shaped stent 46 after being folded in half inward, so that the braided wires of the Y-shaped stent 46 branches are tightened by the tightening soft sleeve 19. The braided wires of the Y-shaped stent 46 branches are put on the outer periphery of the two guide wire sleeves and the main road of the Y-shaped stent 46 is inserted into the outer sleeve 2. The outer sleeve 2 tightens the braided wires of the main road of the Y-shaped stent 46. The front end face of the double-lumen catheter 5 is pressed against the rear port of the main road of the Y-shaped stent 46. When the main road of the Y-shaped stent 46 needs to be released, the double-lumen catheter 5 is pushed to push the main road of the Y-shaped stent 46 out of the outer sleeve 2. An outer sleeve 2 and various catheters and guide wires inside the outer sleeve 2 are sleeved inside the main cavity opening at the lower end of the endoscope tube 1, and the rear ends of the above-mentioned various catheters and the rear ends of the guide wires are respectively clamped and connected with their corresponding traction tubes, so that the traction tubes can be controlled by various ends at the upper end of the endoscope tube 1 under the guidance of various catheter sliding sleeves to push and pull various catheters at the lower end of the endoscope tube 1, and the Y-shaped stent 46 can be transported to the left and right hepatic ducts 36 of the liver 34 in conjunction with the lateral extension hole 18. It is simple, convenient and practical.

[0050] As a preferred technical solution, a fixed tightening ring 20 is sleeved on the first guide wire sleeve 8 and the second guide wire sleeve 9, and one end of the tightening soft sleeve 19 is clamped between the fixed tightening ring 20 and the first guide wire sleeve 8 and the second guide wire sleeve 9.

[0051] The fixed tightening ring 20 is sleeved on the outer circumference of the guide wire sleeve. The fixed tightening ring 20 has a certain width and a certain gap with the outer circumference of the guide wire sleeve. One end of the tightening soft sleeve 19 is clamped between the fixed tightening ring 20 and the guide wire sleeve. One end of the tightening soft sleeve 19 is connected to the fixed tightening ring 20. The tightening soft sleeve 19 is always in a strongly tightened state.

[0052] As a preferred technical solution, a guide wire sleeve catheter head 21 is provided on the end of the first guide wire sleeve 8 and the second guide wire sleeve 9 facing the upper area of ​​the endoscope tube 1, and a fixed tightening ring 20 is connected to the end of the guide wire sleeve catheter head 21 facing the tightening soft sleeve 19.

[0053] A guide wire sleeve catheter head 21 is fixedly connected to the end of the first guide wire sleeve 8 and the second guide wire sleeve 9 inside the double-lumen catheter 5, and a fixed tightening ring 20 is fixed on the rear end surface of the guide wire sleeve catheter head 21, and the tightening soft sleeve 19 has a relatively long length, which will not be shorter than twice the length of the Y-shaped bracket 46 branch, so that the tightening soft sleeve 19 can wrap and tighten the Y-shaped bracket 46 branch on the corresponding side of the entire Y-shaped bracket 46 after the double layer is folded inwardly, and the port of the tightening soft sleeve 19 can be pulled back to the outer end of the port of the Y-shaped bracket 46 branch after being folded inwardly. This design can tighten the braided wire of the Y-type bracket 46 branch by the tightening soft sleeve 19, and when the guide wire sleeve is pushed forward so that the guide wire sleeve catheter head 21 and the fixed tightening ring 20 drive the tightening soft sleeve 19 to be pulled forward, the circular fold circle tightened by the tightening soft sleeve 19 on the outer periphery of the Y-type bracket 46 branch can be pulled forward by the tightening soft sleeve 19, and continuously rolls toward the front direction of the Y-type bracket 46 branch to be installed to form an effect of the circumferential fold circle moving forward, thereby achieving the effect of continuously releasing the braided wire of the Y-type bracket 46 branch from the root toward the front end port. And as the tightening sleeve 19 is continuously pulled forward, the Y-shaped bracket 46 branch is finally completely released. This design ensures that during the process of releasing the Y-shaped bracket 46 branch, the tightening fitting surface of the tightening sleeve 19 and the braided wire of the Y-shaped bracket 46 branch will not slip, but will be rubbed forward with the circumferential folding circle, and the tightening sleeve 19 will be continuously lifted up, thereby releasing the Y-shaped bracket 46 branch. If conventional release means are commonly used, the tightening structure will slip relative to the braided wire of the Y-shaped bracket 46 branch to produce friction, which will increase the pulling force required for release and increase the possibility of slipping of the Y-shaped bracket 46 during release, causing deviation in the implantation position, which invisibly produces uncontrollable risks in the operation.

[0054] As a preferred technical solution, the guidewire catheter head 21 is conical and has rounded chamfers at the edges. The guidewire catheter head 21 is conical and has rounded chamfers at the edges to facilitate advancement and prevent scratching inside the patient's bile duct to cause damage to the inner wall of the bile duct.

[0055] As a preferred technical solution, the outer sleeve catheter head 47 is composed of a plurality of conical pieces distributed around the circumference, and the conical pieces are inclined toward the axis of the outer sleeve 2.

[0056] An outer sleeve 2 is sleeved inside the main cavity, and the outer sleeve 2 is mainly located in the middle and lower sections of the main cavity. A plurality of circumferentially distributed conical pieces are fixed to the end face of the front end of the outer sleeve 2. The conical pieces are all inclined at a certain angle toward the axial direction. There are intervals between adjacent conical pieces. All the circumferentially distributed conical pieces are combined into an outer sleeve catheter head 47. The outer sleeve catheter head 47 adopts a circumferentially distributed conical piece design to enable it to have the characteristic of opening to all sides. The outer sleeve catheter head 47 has a taper toward the axial direction in the absence of external force, which can limit the Y-shaped bracket 46 section inside the outer sleeve 2 to prevent the structure sleeved inside the outer sleeve 2 from slipping.

[0057] As a preferred technical solution, the device also includes a first push-pull head 22, a second push-pull head 23, a third push-pull head 24, and a fourth push-pull head 25; the first guide wire 14 extends out of the first guide wire sleeve 8 and is connected to the first push-pull head 22, and the second guide wire 15 extends out of the second guide wire sleeve 9 and is connected to the second push-pull head 23; one end of the first guide wire traction tube 16 extends out of one end of the endoscope tube 1 and is connected to the third push-pull head 24, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the first push-pull head 22; one end of the second guide wire traction tube 17 extends out of one end of the endoscope tube 1 and is connected to the fourth push-pull head 25, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the second push-pull head 23.

[0058] The first guide wire 14 and the second guide wire 15 are respectively inserted into the two guide wire sleeves, and the lower ends of the two guide wires are respectively connected to the first push-pull head 22 and the second push-pull head 23 after extending out of the guide wire sleeve traction end, and the other sides of the end faces of the first push-pull head 22 and the second push-pull head 23 can be clamped and connected to the first guide wire traction tube 16 and the second guide wire traction tube 17, respectively. The two guide wire traction tubes are respectively passed into the traction cavity of the endoscope tube 1, and also extend from the upper end port of the endoscope tube 1, and the extension length is longer than the extension length of the guide wire sleeve sliding sleeve. The third push-pull head 24 and the fourth push-pull head 25 are respectively fixedly connected to the upper ends of the first guide wire traction tube 16 and the second guide wire traction tube 17.

[0059] As a preferred technical solution, the first push-pull head 22, the second push-pull head 23, the third push-pull head 24, and the fourth push-pull head 25 are all cylindrical rod-shaped. The push-pull head is designed to be cylindrical rod-shaped, which is convenient for doctors to hold with their fingers for push-pull operations during surgery.

[0060] As a preferred technical solution, the outer tube traction tube 3 is longer than the endoscope tube 1. The outer tube traction tube 3 can be pulled much longer than the endoscope tube 1, so that the outer tube 2 can be pulled and transported to the inside of the bile duct through the outer tube traction tube 3.

[0061] As a preferred technical solution, the number of traction lumens is six, and the six traction lumens are evenly arranged on the circumference of the endoscope tube 1. The six traction lumens are respectively covered with an outer sleeve traction tube 3, a double-lumen catheter traction tube 6, a first guide wire traction tube 10, a second guide wire traction tube 11, a first guide wire traction tube 16, and a second guide wire traction tube 17.

[0062] As a preferred technical solution, an outer sleeve traction terminal 26 is provided on the outer sleeve 2, and an outer sleeve traction terminal 27 is provided on the outer sleeve sliding sleeve 4; one end of the outer sleeve traction tube 3 extends out of one end of the endoscope tube 1 and is connected to the outer sleeve sliding sleeve traction terminal 27, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the outer sleeve traction terminal 26;

[0063] The double-lumen catheter 5 is provided with a double-lumen catheter traction terminal 28, and the double-lumen catheter sliding sleeve 7 is provided with a double-lumen catheter sliding sleeve traction terminal 29; one end of the double-lumen catheter traction tube 6 extends out of one end of the endoscope tube 1 and is connected to the double-lumen catheter sliding sleeve traction terminal 29, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the double-lumen catheter traction terminal 28;

[0064] The first guide wire sleeve 8 is provided with a first guide wire sleeve traction terminal 30, the second guide wire sleeve 9 is provided with a second guide wire sleeve traction terminal 31, the first guide wire sleeve slide sleeve 12 is provided with a first guide wire sleeve slide sleeve traction terminal 32, and the second guide wire sleeve slide sleeve traction terminal 33 is provided on the second guide wire sleeve slide sleeve 13; one end of the first guide wire sleeve traction tube 10 extends out of one end of the endoscope tube 1 and is connected to the first guide wire sleeve slide sleeve traction terminal 32, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the first guide wire sleeve traction terminal 30; one end of the second guide wire sleeve traction tube 11 extends out of one end of the endoscope tube 1 and is connected to the second guide wire sleeve slide sleeve traction terminal 33, and the other end can extend out of the other end of the endoscope tube 1 and be detachably connected to the second guide wire sleeve traction terminal 31.

[0065] This device is mainly used to implant a Y-shaped stent 46 into the bile duct inside the liver 34. The outermost periphery of this device is an endoscope tube 1. A main cavity with a circular cross section is opened in the central axis area of ​​the endoscope tube 1. At the same time, six traction cavities are axially penetrated in the endoscope tube 1 area around the main cavity. The inner diameter of the main cavity is much larger than the traction cavity. The rear end of the outer sleeve 2 extends a certain distance from the solid section at the lower end of the endoscope tube 1. A protruding outer sleeve traction terminal 26 is fixed on the rear end end of the outer sleeve 2. The outer sleeve traction terminal 26 can be clamped and connected with an outer sleeve traction tube 3. The outer sleeve traction tube 3 passes through one of the traction cavities inside the endoscope tube 1 and reaches the upper end of the endoscope tube 1 and extends a certain distance. The outer sleeve traction tube 3 has a certain strength and can push and support the traction outer sleeve 2 in the axial direction. An outer sleeve sliding sleeve 4 is sleeved inside the main cavity in the upper section of the endoscope tube 1. The outer diameter of the outer sleeve sliding sleeve 4 is the same as the outer diameter of the outer sleeve 2. An outer sleeve sliding sleeve traction end 27 is fixedly integrated with the tube wall at the upper end of the outer sleeve sliding sleeve 4. The protruding end of the outer sleeve sliding sleeve traction end 27 is connected to the upper end of the outer sleeve traction tube 3.

[0066] The outer sleeve 2 and the outer sleeve sleeve 4 are respectively sleeved on the lower section and the upper section of the main cavity inside the endoscope tube 1. The outer sleeve 2 and the outer sleeve sleeve 4 will never contact each other. The outer sleeve sleeve 4 plays the role of pushing and pulling the control end. The tube body and the end of the outer sleeve sleeve 4 adopt the same structure as the outer sleeve 2, so that the attending physician can accurately find the outer sleeve sleeve 4 that controls the traction of the outer sleeve 2 at the control end through visual identification during the operation, and control the outer sleeve traction tube 3 to pull the outer sleeve 2 through the outer sleeve sleeve traction end 27 on one side of the outer sleeve sleeve 4, so as to achieve the effect of conveying the outer sleeve 2 in the main cavity of the endoscope tube 1.

[0067] A double-lumen catheter 5 is sleeved inside the outer tube 2, and the two lumens inside the double-lumen catheter 5 have the same cross-sectional size and the inner diameters of the two lumens are slightly larger than the outer diameter of the guide wire sleeve. The double-lumen catheter 5 is in the inner cavity of the outer tube 2, and the front end is always placed inside the outer tube 2 and does not extend from the end formed by the conical sheet of the outer tube 2, and the rear end extends from the rear end port of the outer tube 2 and extends a certain distance. A fixed double-lumen catheter traction end 28 protrudes from the rear end side wall of the double-lumen catheter 5, and the protruding end of the two-way catheter traction end can be clamped and connected with a double-lumen catheter traction tube 6, which passes through a traction channel of the endoscope tube 1 and extends a certain distance from the other end port of the traction channel inside the endoscope tube 1, and the extension length of the double-lumen catheter traction tube 6 from the upper end port of the endoscope tube 1 is longer than the extension length of the outer tube traction tube 3. A double-lumen catheter sleeve 7 is sleeved inside the outer sleeve sleeve 4, and the upper end of the double-lumen catheter sleeve 7 extends out of the outer sleeve sleeve 4, and a protruding double-lumen catheter sleeve traction end 29 is fixed integrally on the side wall at the upper end port of the double-lumen catheter sleeve 7, so that the upper end of the double-lumen catheter traction tube 6 is fixedly connected to the double-lumen catheter sleeve traction end 29.

[0068] The first guide wire sleeve 8 and the second guide wire sleeve 9 are respectively sleeved in the two lumens inside the double-lumen catheter 5, and the rear ends of the first guide wire sleeve 8 and the second guide wire sleeve 9 extend a certain length from the port of the double-lumen catheter 5, and the first guide wire sleeve traction terminal 30 and the second guide wire sleeve traction terminal 31 are respectively fixed at the rear ends of the two guide wire sleeves. The structures of the two guide wire sleeve traction terminals are similar to the structure of the double-lumen catheter traction terminal 28, and the first guide wire sleeve traction tube 10 and the second guide wire sleeve traction tube 11 can be clamped and connected on the other side of the two guide wire sleeve traction terminals. The two guide wire sleeve traction tubes are also respectively passed into the two traction cavities of the endoscope tube 1 and penetrate to the upper end port of the endoscope tube 1 to extend and respectively connect the first guide wire sleeve sliding sleeve traction terminal 32 and the second guide wire sleeve sliding sleeve traction terminal 33, and the extension length of the two guide wire sleeve traction tubes is longer than the extension length of the double-lumen catheter sliding sleeve 7. A first guide wire sleeve slide 12 and a second guide wire sleeve slide 13 are respectively sleeved inside the two lumens of the double-lumen catheter sleeve 7, and a first guide wire sleeve slide traction end 32 and a second guide wire sleeve slide traction end 33 are respectively fixedly connected to the upper ends of the two guide wire sleeve slides, and the shapes of the two guide wire sleeve slide traction ends are the same as those of the two guide wire sleeve traction ends.

[0069] The outer tube traction end 26, double-lumen catheter traction end 28, guide wire sleeve traction end, and push-pull head at the rear end of the endoscope tube 1 are not connected to their corresponding traction tubes in the initial state. When the outer tube 2 and its internal catheter are passed into the main cavity of the endoscope tube 1, the above-mentioned various traction ends at the rear end of the endoscope are clamped and connected to their corresponding traction tubes. And various traction ends have a long lateral extension distance for easy manual clamping operation.

[0070] When the biliary Y-shaped stent 46 needs to be implanted and placed, the following steps are required:

[0071] Step 1: See Figure 6 , the left hepatic duct 35 and the right hepatic duct 36 converge into the common hepatic duct 37 in the liver 34 of the human body, and there is a gallbladder 38 connected to the cystic duct 39 next to it, the common hepatic duct 37 and the cystic duct 39 converge into the common bile duct 40, and the pancreas 41 is connected to the duodenum 44. The endoscope tube 1 passes through the patient's mouth into the esophagus 42, and the lower end of the endoscope tube 1 passes through the stomach 43 to the duodenum 44, so that the lateral extension hole 18 of the endoscope tube 1 faces the duodenal papilla 45 at the intersection of the duodenum 44 and the bile duct of the patient, and the duodenal papilla 45 protrudes toward the duodenum 44 like a papilla. At this time, various traction sleeves and various traction tubes are set inside the upper section of the endoscope tube 1, and the various traction tubes do not extend out of the traction cavity at the lower end of the endoscope tube 1.

[0072] Step 2, respectively put the braided wires of the two Y-shaped stent 46 branches on the guide wire sleeves at the rear end of the guide wire sleeve catheter head 21 on the corresponding side, so that the tightening soft sleeve 19 can wrap and tighten the Y-shaped stent 46 branches on the corresponding side of the entire Y-shaped stent 46 after being folded inwardly in half, and the port of the tightening soft sleeve 19 can be pulled back to the outer end of the port of the Y-shaped stent 46 branch after being folded inwardly, so that the braided wires of the Y-shaped stent 46 branch are tightened by the tightening soft sleeve 19. Put the braided wires of the Y-shaped stent 46 branches on the outer periphery of the two guide wire sleeves and insert the main road of the Y-shaped stent 46 into the outer sleeve 2, the outer sleeve 2 tightens the braided wires of the main road of the Y-shaped stent 46, the front end face of the double-lumen catheter 5 is pressed against the rear port of the main road of the Y-shaped stent 46, and when the main road of the Y-shaped stent 46 needs to be released, the double-lumen catheter 5 is pushed to push the main road of the Y-shaped stent 46 out of the outer sleeve 2. The outer tube 2 and various catheters and guide wires inside the outer tube 2 are sleeved inside the main cavity opening at the lower end of the endoscope tube 1, and the traction ends at the rear ends of the above-mentioned various catheters and the push-pull heads at the rear ends of the guide wires are respectively clamped and connected with the corresponding traction tubes, so that the traction tubes can be controlled by the various traction ends at the upper end of the endoscope tube 1 under the guidance of the various catheter sleeves to push and pull the various catheters at the lower end of the endoscope tube 1. First, the first push-pull head 22 and the second push-pull head 23 are controlled to pull the two guide wires out of the outer tube catheter head 47 of the outer tube 2, and the two guide wires are extended from the lateral extension hole 18 of the middle cavity section of the endoscope tube 1 and extend from the duodenal papilla 45 into the bile duct.

[0073] Step 3: Operate the first push-pull head 22 and the second push-pull head 23 at the lower end of the endoscope tube 1 to deliver the two guide wires to the left hepatic duct 35 and the right hepatic duct 36 of the liver 34 and continue to deliver them forward for a distance.

[0074] Step 4, the guidewire path leading to the left and right hepatic ducts 36 is completed, and the outer sheath 2, the double-lumen catheter 5, and the guidewire sleeve are manipulated by the various catheter traction ends at the lower end of the endoscope tube 1 to move the outer sheath 2 and the catheter sheathed inside it along the guidewire path from the lumen of the duodenum 44 through the duodenal major papilla 45 into the bile duct, and reach the intersection of the main bile duct and the left and right hepatic ducts 36.

[0075] Step 5, pull the outer tube traction end 26 backward to pull the outer tube 2 backward and keep other catheters inside it stationary, so that the entire area from the branch port to the root of the Y-shaped bracket 46 tightened by the tightening soft sleeve 19 is exposed from the front end of the outer tube 2.

[0076] Step 6: At the same time, the outer sleeve traction end 26, the double-lumen catheter traction end 28, the first guide wire sleeve traction end 30, and the second guide wire sleeve traction end 31 at the lower end of the endoscope tube 1 are pushed forward at the same time, so that the outer sleeve 2 and its internal catheter move forward at the same time in the bile duct so that the guide wire sleeve section extending out of the outer sleeve 2 and tightened with the Y-shaped stent 46 branch section can be pushed into the corresponding left and right hepatic ducts 36.

[0077] Step 7, push the first wire guide sleeve traction end 30 and the second wire guide sleeve traction end 31 forward to make the wire guide sleeve move forward relative to the outer sleeve 2. Because the outer sleeve 2 remains stationary, the Y-shaped bracket 46 remains stationary, so that the wire guide sleeve catheter head 21 drives the fixed tightening ring 20 to pull the tightening soft sleeve 19 forward, so that the circumferential folding circle of the tightening soft sleeve 19 tightening the outer periphery of the Y-shaped bracket 46 branch can be pulled forward by the tightening soft sleeve 19, and continuously rolls in the front direction of the Y-shaped bracket 46 branch to be installed to form the effect of moving the circumferential folding circle forward, so as to achieve the effect of continuously releasing the braided wire of the Y-shaped bracket 46 branch from the root to the front end port direction. And as the tightening soft sleeve 19 continues to be pulled forward, the Y-shaped bracket 46 branch is finally completely released.

[0078] Step 8: After the two branch braided wires of the Y-shaped stent 46 are completely released, the branch braided wires of the Y-shaped stent 46 support the walls of the left and right hepatic ducts 36 and fix the position of the Y-shaped stent 46. Pull the outer tube traction end 26 backward, so that the outer tube 2 moves backward to release the main path of the Y-shaped stent 46. Finally, when the outer tube 2 is completely separated from the Y-shaped stent 46, the Y-shaped stent 46 is completely released, thereby supporting the internal wall of the liver 34.

[0079] The innovative technical points and beneficial effects of the present invention are at least:

[0080] 1. Various catheters and catheter sleeves are respectively provided at the lower and upper sections inside the endoscope tube 1, and the corresponding upper and lower catheters are connected to the catheter sleeves through a traction tube. The catheter sleeve guides the traction tube during traction, and traction ends are provided at the ends of the catheter sleeve and the catheter, which can facilitate the delivery of the catheter in the patient's body by hand-held control. In addition, the design of introducing the catheter from the rear end of the endoscope tube 1 can accurately deliver the Y-shaped stent 46 to the designated cavity with the shortest delivery distance compared with the original stent delivery method.

[0081] 2. In the tightening mode of the Y-type stent 46 branch, a fixed tightening ring 20 fixed at the rear end of the guide wire sleeve catheter head 21 and the guide wire sleeve are used to perform inward folding double-layer tightening of the tightening sleeve 19, so that when released, the tightening sleeve 19 will be continuously lifted up as the circular folding circle rolls and rubs forward, thereby releasing the Y-type stent 46 branch. If conventional release methods are commonly used, the tightening structure will slip relative to the braided wire of the Y-type stent 46 branch to produce friction, which will increase the pulling force required for release and increase the possibility of slipping of the Y-type stent 46 during release, causing deviation in the implantation position, which invisibly creates uncontrollable risks in the operation.

[0082] 3. The conical outer tube catheter head 47 is formed as a whole by using the conical pieces with elastic deformation characteristics uniformly distributed around the circumference. This design can prevent the guide wire sleeve and the Y-shaped stent 46 set in the inner cavity of the outer tube 2 from slipping off the outer tube catheter head 47 when the outer tube 2 is in the state of pushing each catheter in the patient's body. When the Y-shaped stent 46 is released, the outer tube catheter head 47 can be pushed open in a divergent manner. This design is simple in structure, easy to operate, and has strong stability.

[0083] 4. The endoscope tube 1 is designed with solid sections at both ends and a hollow section in the middle, and a lateral extension hole 18 is opened on the lateral tube wall of the hollow section, so that the Y-shaped stent 46 delivery catheter can be extended laterally from the endoscope tube 1 and continue to be delivered. For some lumens that are difficult to insert a catheter or implant a stent, this method greatly simplifies the delivery path and provides more possibilities for stent implantation solutions.

[0084] 5. A double-lumen catheter 5 is sleeved inside the outer sleeve 2 to form guide channels for the two guide wire sleeves respectively, and when the main path of the Y-shaped stent 46 is tightened by the outer sleeve 2, the double-lumen catheter 5 can boost the main path port of the Y-shaped stent 46.

[0085] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A Y-shaped biliary stent endoscopic retrograde implantation device through the duodenal papilla, characterized in that: include: Endoscope tube, outer tube, outer tube traction tube, outer tube sliding sleeve, double-lumen catheter, double-lumen catheter traction tube, double-lumen catheter sliding sleeve, first guide wire sleeve, second guide wire sleeve, first guide wire sleeve traction tube, second guide wire sleeve traction tube, first guide wire sleeve sliding sleeve, second guide wire sleeve sliding sleeve, first guide wire, second guide wire, first guide wire traction tube, second guide wire traction tube; The endoscope tube is divided into three sections, namely a solid section, a cavity section, and a solid section in sequence; a lateral extension hole is provided at the cavity section of the endoscope tube for facilitating the extension of each guide wire and each catheter; a main lumen and multiple traction lumens are provided on the endoscope tube; the outer sleeve is sleeved in the main lumen in the middle and lower sections of the endoscope tube; the outer sleeve sliding sleeve is sleeved in the main lumen in the upper section of the endoscope tube; the outer sleeve and the outer sleeve sliding sleeve are arranged without contact; the outer sleeve traction tube, the double-lumen catheter traction tube, the first guide wire traction tube, the second guide wire traction tube, the first guide wire traction tube, the second guide wire traction tube The wire traction tube is sleeved in the traction cavity; one end of the outer sleeve traction tube extends out of one end of the endoscope tube and is connected to the outer sleeve sliding sleeve, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the outer sleeve; one end of the outer sleeve is provided with an outer sleeve catheter head for clamping the main path of the Y-shaped stent, and the other end is sleeved with the double-lumen catheter; the double-lumen catheter sliding sleeve is sleeved in the outer sleeve sliding sleeve and extends out of the outer sleeve sliding sleeve; one end of the double-lumen catheter traction tube extends out of one end of the endoscope tube and is connected to the double-lumen catheter sliding sleeve, and the other end can extend out of the other end of the endoscope tube One end of the first guide wire sleeve is detachably connected to the double-lumen catheter; the first guide wire sleeve and the second guide wire sleeve are sleeved in the double-lumen catheter and extend out of the double-lumen catheter, the first guide wire sleeve sliding sleeve and the second guide wire sleeve sliding sleeve are sleeved in the double-lumen catheter sliding sleeve and extend out of the double-lumen catheter sliding sleeve; one end of the first guide wire sleeve traction tube extends out of one end of the endoscope tube and is connected to the first guide wire sleeve sliding sleeve, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the first guide wire sleeve; one end of the second guide wire sleeve traction tube extends out of one end of the endoscope tube and is connected to the second guide wire sleeve sliding sleeve , and the other end can extend out of the other end of the endoscope tube and be detachably connected to the second guide wire sleeve; the first guide wire sleeve is arranged in the first guide wire sleeve and extends out of the first guide wire sleeve, and the second guide wire sleeve is arranged in the second guide wire sleeve and extends out of the second guide wire sleeve; one end of the first guide wire pulling tube extends out of one end of the endoscope tube, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the first guide wire; one end of the second guide wire pulling tube extends out of one end of the endoscope tube, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the second guide wire; The ends of the first and second guide wire sleeves facing the upper region of the endoscope tube are provided with tightening soft sleeves which are always in a tightened state, and the tightening soft sleeves can tighten the Y-shaped stent branch after the double layers are folded inwards in half; The outer sleeve catheter head is composed of a plurality of conical pieces distributed around the circumference, and the conical pieces are arranged obliquely toward the axis of the outer sleeve; The length of the outer sleeve traction tube is longer than the length of the endoscope tube.

2. The device according to claim 1, characterized in that The first wire guide sleeve and the second wire guide sleeve are sleeved with a fixed tightening ring, and one end of the tightening soft sleeve is clamped between the fixed tightening ring and the first wire guide sleeve and the second wire guide sleeve.

3. The device according to claim 2, characterized in that The ends of the first guide wire sleeve and the second guide wire sleeve facing the upper section of the endoscope tube are provided with guide wire sleeve catheter heads, and the ends of the guide wire sleeve catheter heads facing the tightening soft sleeve are connected with the fixed tightening ring.

4. The device according to claim 3, characterized in that The guide wire sleeve catheter head is conical and the edges thereof are all chamfered.

5. The device according to claim 1, characterized in that The device also includes a first push-pull head, a second push-pull head, a third push-pull head, and a fourth push-pull head; the first guide wire extends out of the first guide wire sleeve and is connected to the first push-pull head, and the second guide wire extends out of the second guide wire sleeve and is connected to the second push-pull head; one end of the first guide wire traction tube extends out of one end of the endoscope tube and is connected to the third push-pull head, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the first push-pull head; one end of the second guide wire traction tube extends out of one end of the endoscope tube and is connected to the fourth push-pull head, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the second push-pull head.

6. The device according to claim 5, characterized in that The first push-pull head, the second push-pull head, the third push-pull head and the fourth push-pull head are all in the shape of cylindrical rods.

7. The device according to claim 1, characterized in that The outer sleeve is provided with an outer sleeve traction end, and the outer sleeve is provided with an outer sleeve traction end; one end of the outer sleeve traction tube extends out of one end of the endoscope tube and is connected to the outer sleeve traction end, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the outer sleeve traction end; The double-lumen catheter is provided with a double-lumen catheter traction terminal, and the double-lumen catheter sliding sleeve is provided with a double-lumen catheter sliding sleeve traction terminal; one end of the double-lumen catheter traction tube extends out of one end of the endoscope tube and is connected to the double-lumen catheter sliding sleeve traction terminal, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the double-lumen catheter traction terminal; The first guide wire sleeve is provided with a first guide wire sleeve traction terminal, the second guide wire sleeve is provided with a second guide wire sleeve traction terminal, the first guide wire sleeve sliding sleeve is provided with a first guide wire sleeve sliding sleeve traction terminal, and the second guide wire sleeve sliding sleeve is provided with a second guide wire sleeve sliding sleeve traction terminal; one end of the first guide wire sleeve traction tube extends out of one end of the endoscope tube and is connected to the first guide wire sleeve sliding sleeve traction terminal, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the first guide wire sleeve traction terminal; one end of the second guide wire sleeve traction tube extends out of one end of the endoscope tube and is connected to the second guide wire sleeve sliding sleeve traction terminal, and the other end can extend out of the other end of the endoscope tube and be detachably connected to the second guide wire sleeve traction terminal.

8. The device according to claim 1, characterized in that The number of the traction cavities is six, and the six traction cavities are evenly arranged on the circumference of the endoscope tube.

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