Anti-backflow biliary tract drainage support

An anti-reflux and bile duct technology, applied in the field of medical devices, can solve the problems of difficult to remove stents, unable to contract the sphincter, blockage of stents and other problems, and achieve the effect of preventing reflux.

Inactive Publication Date: 2017-01-11
XIN HUA HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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  • Abstract
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Problems solved by technology

[0006] However, in the existing biliary tract stents, the position of the stent can be located at the upper end of the duodenal opening of the bile duct and pass through the Oddis sphincter. Although such a stent is fixed in place, the sphincter cannot be contracted, making it easy for biliary bacteria to follow the sphincter. There is almost no barrier to prevent duodenal reflux, which results in stent blockage and aggravated infection
Some stents are located in the common bile duct. Although the anti-reflux function of the Oddis sphincte

Method used

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  • Anti-backflow biliary tract drainage support

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Embodiment Construction

[0050]After extensive and in-depth research, the inventor first developed a biliary drainage stent that does not cause duodenal reflux. The biliary drainage stent of the present invention adopts the diversion section and a plurality of drainage openings in the shape of petal parts, so that when the stent is subjected to high pressure in the bile duct, the openings of the diversion section are scattered, which is conducive to the rapid discharge of bile. When the diversion section of the support is impacted by the contents of the duodenum, the diversion section is closed tightly after being pressed, so that the contents of the duodenum will not flow back into the drainage bracket. In addition, the channel formed between the plurality of petal-shaped parts communicates the inside of the tube of the drainage stent with the outside world, so that the drainage speed of bile is accelerated, which is beneficial to the discharge of bile. On this basis, the present invention has been a...

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Abstract

The invention provides an anti-backflow biliary tract drainage support. The biliary tract drainage support includes (a) a support section (10) of a hollow tube-shaped structure; and (b) a drainage section (20), wherein the drainage section (20) includes a base (21) connected to the support section (20), petaloid members (23) (22) which extend from the base to a far end, and block-like structures (25) positioned at a near side. The biliary tract drainage support can ensure drainage of the biliary tract, can effectively prevent backflow of content of duodenums, and then can reduce the opportunities of support blocking and biliary tract infections.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a reflux-preventing biliary stent. Background technique [0002] Biliary obstruction is a disease with a high mortality rate in surgical acute abdomen, which can be divided into malignant biliary obstruction and benign obstruction. Among them, malignant biliary obstruction is mostly secondary to gallbladder cancer, cholangiocarcinoma, pancreatic cancer and other hepatobiliary malignancies, while benign obstruction is mostly secondary to biliary stones, gallbladder surgery, or chronic pancreatitis. [0003] Under normal conditions, the biliary tract remains sterile due to the tone of the sphincter of Oddis, continuous bile flushing, and the natural biological barrier within the biliary tract. However, when the biliary tract is obstructed, the biological barrier is disrupted, the bile duct is obstructed, cholestasis, and secondary bacterial infection develops. Pathogenic bacteria a...

Claims

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Application Information

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IPC IPC(8): A61F2/89
Inventor 汪保灿王雪峰张文杰汪余勤顾钧赵铭宁吴文广
Owner XIN HUA HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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