Endovascular stent special for TIPS operations

An internal stent and blood vessel technology, applied in the field of endovascular stent, can solve the problems of high risk of portal vein puncture point bleeding, inability to seal the breach, and high cost, and achieves improved long-term patency rate, excellent positioning effect, and reduced impact. Effect

Pending Publication Date: 2019-04-23
李卫校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventors of the present application found that: 1. When a bare stent is used to establish an intrahepatic portosystemic shunt channel, body tissues can proliferate into the lumen of the stent through the mesh of the stent, and the incidence of postoperative restenosis is high; 2. The bare stent cannot seal If the breach at the portal vein puncture point is blocked, the risk of bleeding at the portal vein puncture

Method used

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  • Endovascular stent special for TIPS operations
  • Endovascular stent special for TIPS operations
  • Endovascular stent special for TIPS operations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: a kind of intravascular stent, see Figure 2-3 , including a straight cylindrical elastic skeleton 21 and a tubular coating 22 .

[0023] The straight cylindrical elastic skeleton 21 adopts a tubular bracket with meshes manufactured by laser etching on tubular metal.

[0024] The tubular covering film 22 can be a film suitable for medical stents, which has good toughness, such as PTFE material, polytetrafluoroethylene material and the like.

[0025] The tubular covering film 22 can be fixedly arranged in the middle of the straight cylindrical elastic skeleton 21 by means of wrapping, interweaving, etc., and the fixing method can be bonding, tissue pedicle connection (tissue pedicle connection means that one substance is combined with another substance Partially or fully wrapped), so that the two ends of the straight cylindrical elastic skeleton 21 form a bare front-end anchoring portion 211 and a rear-end anchoring portion 212, both of which are bare sten...

Embodiment 2

[0029] Embodiment 2: a kind of intravascular stent, see Figure 2-4 , including a straight cylindrical elastic skeleton 21 and a tubular coating 22 .

[0030] The straight cylindrical elastic skeleton 21 is a braided fabric made of filaments, which may be metal wires for intravascular stents, for example, nickel-titanium wires.

[0031] see Figure 4-6 , a bulky transition section (corresponding to L24) is formed at the front end of the wire braided skeleton, and a tubular coating is arranged on the bulky transition section, and one end of the tubular coating 22 is preferably arranged at the largest outer portion of the bulky transition section. path.

[0032] see Figure 4 , at the boundary between the front end of the straight cylindrical elastic framework 21 and the tubular coating 22, it is preferable to set a developing marking point 3 on the front end anchoring portion 211.

[0033] Taking intrahepatic portosystemic shunt (TIPS) surgery as an example, the rear anchor...

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PUM

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Abstract

The invention relates to an endovascular stent special for TIPS operations. The endovascular stent aims at solving the problem that blood flow of portal veins and hepatic veins is seriously influencedwhen a straight cylindrical covered stent is applied to the TIPS operations, and simultaneously solving the problem that traditional bare stents are likely to cause stent occlusion resulted from tissue proliferation into stent lumens. The endovascular stent comprises a straight cylindrical framework and a tubular covering film. The tubular covering film is fixedly arranged in the middle of the straight cylindrical framework to enable the two ends of the straight cylindrical framework to form exposed anchoring parts. Both ends of the endovascular stent can form anchoring parts with through holes, the positioning effect is excellent, blood flow can pass through the through holes, and the influence on the blood flow in blood vessels at the anchoring parts can be reduced when the endovascularstent is applied.

Description

technical field [0001] The invention relates to the technical field of medical stents, in particular to a special intravascular stent for TIPS (transjugular intrahepatic portosystemic shunt) surgery. Background technique [0002] Globally, liver cirrhosis is the fourth leading cause of death (non-communicable diseases) after tumors, cardiovascular diseases, and chronic lung diseases. In the past 20 years, the mortality rate caused by liver cirrhosis and liver cancer has increased by about 50000000. The reason is that liver disease has a strong compensatory function, and the onset of liver disease is hidden and asymptomatic. Patients with liver cirrhosis will show various decompensation symptoms only after they have developed to the decompensation stage. In decompensated cirrhosis, patients will develop esophageal and gastric varices. Once the varicose esophageal and gastric fundus veins rupture and bleed, severe gastrointestinal bleeding will occur. Gastrointestinal blee...

Claims

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Application Information

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IPC IPC(8): A61F2/07A61F2/91
CPCA61F2/07A61F2/91A61F2002/075A61F2002/077A61F2250/0098
Inventor 李卫校翟水亭
Owner 李卫校
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