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Intrahepatic portosystemic shunt stent

A venous shunt and inner covering technology, applied in the medical field, can solve the problem that the covered stent is not suitable for the precise shunt of the intrahepatic portal-systemic vein, and achieve the effect of reducing the influence of blood flow, preventing stent occlusion, and simple and convenient operation.

Pending Publication Date: 2019-01-04
SUZHOU MUNICIPAL HOSPITAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an intrahepatic portosystemic vein shunt stent to solve the problem that the covered stent proposed in the above background technology is not suitable for the precise intrahepatic portosystemic vein shunt

Method used

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  • Intrahepatic portosystemic shunt stent
  • Intrahepatic portosystemic shunt stent
  • Intrahepatic portosystemic shunt stent

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describin...

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Abstract

The invention relates to the field of medical technology, in particular to an intrahepatic portal-systemic venous shunt stent, comprising a tubular inner membrane, one end of the inner film expands outwardly to form an inner film flare. An outer metal mesh is tightly adhered to the outer wall of the inner film, one end of the outer metal mesh expands outwardly to form a metal mesh flared bare area. At the junction of the bare area of the metal mesh flare and the end of the inner film flare, a plurality of metal balls are arranged. By enlarging the opening of one end of the membrane-covered stent in the shape of a "trumpet", four metal marker points are used as the boundary between the enlarged part and the metal mesh part. As that stent and the blood vessel wall of the portal vein are tightly fit, the blood flow influence on the distal end of the portal vein shunt is minimized, tissue regeneration in the stent is reduced, the phenomenon of stent occlusion and "cap" are prevented, and the stent can be accurately positioned under DSA, so that the stent is suitable for precise intrahepatic portosystemic shunt, especially the precise intrahepatic portosystemic shunt through the left branch of the portal vein.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to an intrahepatic portosystemic vein shunt stent. Background technique [0002] Currently, the stents used in TIPS are divided into bare stents and covered stents. Bare stents cause pseudointima formation due to postoperative high-speed blood flow stimulation, which can easily cause shunt restenosis; covered stents can greatly prolong the patency of the shunt, but the portal vein blood flow is easily affected after the stent enters the portal vein; and both ends of the stent Prone to "blocking" phenomenon. The existing covered stents are not suitable for the precise intrahepatic portosystemic shunt. Moreover, the internal diameter of the covered stent graft in the prior art is fixed, which is difficult to satisfy the situation that the intrahepatic portosystemic vein needs to frequently adjust the venous flow velocity. In view of this, we propose an intrahepatic portosystemic ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07
CPCA61F2/07A61F2002/072
Inventor 沈利明周大勇
Owner SUZHOU MUNICIPAL HOSPITAL
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