Self-expanding stent for pancreaticojejunostomy

Abstract

The invention relates to the technical field of medical instruments, in particular to a self-expanding stent for pancreaticojejunostomy. The self-expanding stent for pancreaticojejunostomy comprises aself-expanding stent body which is columnar after being expanded; one end of the self-expanding stent body is provided with a stent pancreas end, and the position, close to the end, of the other endof the self-expanding stent body is provided with a stent jejunum end protruding outwards after being expanded. The surface of the self-expanding stent body is coated with a membranous material layerfor preventing pancreatic juice from leaking. The self-expanding stent has the advantages that the risk of pancreatic fistula is greatly reduced, meanwhile, the operation time is shortened, and the operation risk is reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a self-expanding stent for pancreaticojejunostomy. Background technique [0002] Pancreatic fistula is the most serious complication after pancreatectomy. Pancreatic surgeons have been trying to reduce the risk of pancreatic fistula through technical improvement or drug treatment. However, even in large pancreatic surgery centers, the occurrence of pancreatic fistula after pancreatic surgery The rate is still as high as 3-45%. Pancreatic fistula, especially in patients with pancreaticojejunostomy, is the most important risk factor for poor prognosis. Pancreatic fistula can cause intra-abdominal fluid accumulation, delayed gastric emptying, intra-abdominal infection, bleeding, reoperation and even patient death. Because of the presence of pancreatic fistula, perioperative mortality can still be as high as 3–5% in patients undergoing pancreatectomy with pancreaticojejunos...

AI Technical Summary

Problems solved by technology

However, due to the special nature of the pancreatic structure, the pancreatic duct is located inside the pancreas, the diameter of the pancreatic duct is small, the wall of the pancreatic duct is thin, and the secretion of pancreatic juice is corrosive. This may be the fundamental reason why pancreatic fistula cannot be completely avoided by various anastomosis methods. Traditional surgery has the following defects:

[0005] 1) Plastic stents are mainly used clinically. The thickness of the pancreatic duct varies greatly in patients. It is difficult for the plastic stent to completely match the pancreatic duct, resulting in leakage of pancreatic juice.

[0006] 2) Even a fully matched stent may cause stent mismatch due to edema and regression of pancreas and jejunum tissue during the postoperative period

[0007] 3) The existing technology needs to open a hole in the jejunum, place the stent into the jejunum, and then suture the pancreatic duct and the jejunum, which is difficult to suture and cannot guarantee complete closure of the gap between the pancreatic duct and the jejunum

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