Two-way anti-displacement pancreatic duct stent and implantation device

Abstract

The invention discloses a bidirectional anti-displacement pancreatic duct stent and an implantation device. The bidirectional anti-displacement pancreatic duct stent includes a head end, a first pipe section, a second pipe section, a third pipe section and a tail end in which the lumens are sequentially connected. ; The upper end of the head end is open; the first pipe section includes a plurality of arc-shaped pipe walls that are evenly distributed with the axis of the first pipe section as the axis and protrude away from the axis of the first pipe section. It is connected to the upper end of the second pipe section; the second pipe section is a straight pipe, and its side wall has a drainage hole communicating with the lumen of the second pipe section; the third pipe section is an elbow; the side of the second pipe section lower end opposite to the tail end has barbs and The barb hole corresponding to the barb; the wall of the tail pipe is provided with a ring metal wire. The first pipe segment of the present invention includes multiple arc-shaped pipe walls, and after natural release, the whole pipe is spherical in shape, and plays an anti-displacement effect by generating elastic tension on the inner wall of the pancreatic duct.

Description

technical field [0001] The invention relates to a pancreatic duct stent and an implanting device, in particular to a bidirectional anti-displacement pancreatic duct stent and an implanting device. Background technique [0002] Acute pancreatitis is a common and frequently-occurring disease in my country. Recurrent pancreatitis is prone to be complicated by pancreatic duct stenosis, pancreatic duct stones, pancreatic cysts and pancreatitis abscess. Current treatment options for acute pancreatitis and its complications include conservative drug treatment, endoscopic retrograde cholangiopancreatography (ERCP) pancreatic duct stenting, laparotomy for pancreatic duct stone removal, and pancreatectomy. [0003] Among them, endoscopic retrograde cholangiopancreatography (ERCP) pancreatic duct stenting is currently the main surgical plan for the treatment of acute pancreatitis and its complications. The pancreatic duct stents used in the operation include metal stents and resin sten...

AI Technical Summary

Problems solved by technology

Currently used pancreatic duct stents include straight barbed pancreatic duct stents, single pigtail pancreatic duct stents and double pigtail pancreatic duct stents, but the above-mentioned pancreatic duct stents have the following disadvantages: 1. The tail of the straight pancreatic duct stents with barbs The barb can be closed by itself, and under the action of intestinal peristalsis, it is easy to come out or enter the pancreatic duct, and then lose the role of draining pancreatic juice and supporting the narrow pancreatic duct; , its barbs can damage the pancreatic duct and duodenal papilla mucosa, induce pancreatitis, papillitis, papillary hemorrhage, and even cause acute cholangitis and obstructive jaundice due to papillary edema and damage the liver; 3. Single pigtail pancreatic duct stent It is mainly used for the prevention of pancreatitis after ERCP. There is no barb in the tail, and the drainage tube is placed deep and lacks positioning. It is easy to cause the single pigtail pancreatic duct stent to be placed too deep or too shallow. Located in the duodenum, the pancreatic duct stent is very easy to prolapse by itself; 4. The double pigtail pancreatic duct stent has an excellent anti-displacement effect, but the pigtail pancreatic duct in the pancreatic duct exerts tension on the bile duct wall through its own tension to prevent However, its head continuously compresses the pancreatic duct mucosa, which is prone to mucosal damage, and even breaks through the mucosa and enters the pancreatic parenchyma, causing acute fulminant pancreatitis, pancreatic abscess, or rupture of the splenic artery.

Images