'J' type biliary stent for drainage of high biliary obstruction

A technology of biliary obstruction and high position, which is applied in the field of medical devices, can solve problems such as obstruction, stent displacement, slippage and drainage, and achieve the effects of improving practicability, simple and easy production, and stable and reliable drainage effect

Pending Publication Date: 2018-08-28
THE FIFTH MEDICAL CENT OF CHINESE PLA GENERAL HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a "J"-shaped biliary stent for drainage of high biliary obstruction, which is used to solve the problems existing in the prior art that easily lead to stent displacement, slippage, or poor drainage.

Method used

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  • 'J' type biliary stent for drainage of high biliary obstruction
  • 'J' type biliary stent for drainage of high biliary obstruction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a "J" type biliary stent 1 for high biliary obstruction drainage provided by the present invention is composed of a bile duct part 2 and an intestinal tract part 3, the length of the bile duct part 2 is between 11-17 cm, and the inner diameter of the bile duct part is 7 or 8.5 Fr, the diameter of the bile duct decreases gradually along the direction away from the intestinal tract, and the number of drainage side holes 4 with a diameter of 2mm are distributed in the head of the bile duct in a staggered arrangement on the tube wall. An X-ray-opaque mark 6 is provided about 5 mm away from the opening of the head end of the bile duct for marking the position of the stent in the hepatic duct. Intestinal part 3 The intestinal part is connected to the end of the bile duct part 2 and is a 3 / 4 circular ring structure with an inner diameter of about 2 cm, and the length of the intestinal part is between 4.7 cm and 5 cm, so that the intestinal part can b...

Embodiment 2

[0030] Compared with Embodiment 1, the bile duct 2 enters the right hepatic duct 11 through the common bile duct 9, and the rest is the same as Embodiment 1.

Embodiment 3

[0032] Compared with Example 1 in this example, the bile duct part 2 of the second "J"-shaped biliary stent implanted later enters the right hepatic duct 11 through the common bile duct 9, and the intestinal tract parts of the two stents are all in the descending duodenum. Part forms a "C" ring, and the rest are the same as in Example 1.

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Abstract

The invention provides a 'J' type biliary stent for drainage of high biliary obstruction, which comprises: a bile duct part arranged in a common bile duct and an intestinal part arranged in a duodenum. The intestinal part is integrally connected with the bile duct part. A large 'C' type structure is formed in the intestinal part. By arranging the bile duct part and the intestinal part and settingthe intestinal part as a large 'C' type structure, the intestinal part can form a 'C' type ring at the descending part of duodenum, which effectively avoids the situations of movement of the long frame for drainage of high-level biliary obstruction to the bile duct and slip of the duodenum. As a result, the drainage effect is more stable and reliable, and the practicability of the 'J' type biliary stent for drainage of high biliary obstruction is improved. The manufacture is simple, which facilitates the popularization and application in the market.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a biliary tract stent. Background technique [0002] The application of endoscopic retrograde cholangiopancreatography (ERCP) to implant biliary plastic stents has been widely used to relieve biliary obstruction. High biliary tract obstruction refers to obstruction of the hepatic bile ducts located at and above the hilum. Common causes include benign strictures caused by biliary surgery and liver transplantation, and malignant strictures caused by malignant tumor compression. Due to the size of the biliary metal stent and the obstruction of the confluence of the left and right hepatic ducts, it is difficult to overcome. At present, high biliary obstruction is mainly solved by implanting biliary plastic stents. [0003] The commonly used plastic stents for the biliary tract are usually straight-line catheter-like devices with openings at both ends. Hollows are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/82A61M25/00
CPCA61M25/007A61F2/82A61F2230/0041A61F2230/0013A61F2250/0098A61M2205/32A61M2025/0008
Inventor 沈伟毕义亮刘岩刘鑫谢聪颖
Owner THE FIFTH MEDICAL CENT OF CHINESE PLA GENERAL HOSPITAL
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