Biliary-tract carriage carrying about medicine and preparing method therefor

An inner stent and biliary technology, which is applied in the field of biliary stent, can solve the problem of not being able to carry different drugs and the like, and achieve the effect of improving the treatment effect.

Inactive Publication Date: 2007-11-14
THE FIRST AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIVERSITY OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot solve the problem of choosing different stents due to different drug release rates when the stent contains different drug combinations, or when different stents are required for different points in the biliary tract; And it is convenient to carry different drugs in the biliary stent of appropriate specifications

Method used

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  • Biliary-tract carriage carrying about medicine and preparing method therefor
  • Biliary-tract carriage carrying about medicine and preparing method therefor
  • Biliary-tract carriage carrying about medicine and preparing method therefor

Examples

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Embodiment Construction

[0025] A drug-carrying stent in the biliary tract (refer to Figures 1, 2, 4, 6, and 7). The biliary stent includes a tubular support tube 2 capable of expanding the lumen of the bile duct and having several drug release holes 21 . In the present invention, on the inner wall of the tubular support tube 2, there is a drug storage layer 3 mixed with drugs and excipients, and the core of the drug storage layer 3 has a drainage hole 10 for conducting the bile duct; the tubular support tube The two ends of the 2 are respectively provided with matching connectors which allow more than two biliary inner stents to be connected in series.

[0026] Obviously, the matching of the connectors can have various structural forms, for example, the connectors at both ends are respectively a section of internal thread 23 and a section of external thread 13 (refer to Fig. 6 and Fig. 8 ), or the connectors at both ends are respectively It is a circle of annular inner buckle 23' and a circle of ann...

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Abstract

The present invention relates to a biliary tract interior support frame containing medicine and its preparation method. Said biliary tract interior support frame includes tubular supporting tube which can open cavitary tract of biliary duct and is equipped with several medicine-releasing holes. The inner wall of the invented tubular supporting tube has a layer of medicine-stored layer made up by mixing medicine and excipient. Several biliary tract interior suppert frames can be series-connected together. Said invention also provides the concrete steps of its preparation method.

Description

technical field [0001] The invention relates to a stent that can be implanted in the biliary tract of a human body, in particular to a biliary stent capable of carrying medicine and a method for carrying the medicine in the stent. Background technique [0002] Malignant obstruction of the biliary tract is mostly caused by compression of the hepatic and bile ducts by primary cholangiocarcinoma, liver cancer, pancreatic head cancer, ampulla cancer, gallbladder cancer and other metastatic cancers. Biliary stents relieve symptoms caused by strictures or blockages by dilating narrowed bile ducts or clearing blocked ones. However, stent implantation also has some shortcomings, such as restenosis after implantation is still a clinical problem, the restenosis rate is 13.8%, and a series of symptoms of obstructive jaundice appear after stenosis. Studies on the etiology of stent restenosis have shown that the causes of stent restenosis include tumor growth, tissue reaction hyperplasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/82A61L29/00A61M31/00A61M29/00A61K45/00
Inventor 刘耀刘松青
Owner THE FIRST AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIVERSITY OF PLA
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