Magnetic device for establishing intrahepatic portacaval shunt under intervention

Abstract

The invention discloses a magnetic device for establishing intrahepatic portacaval shunt under intervention. The magnetic device comprises a pair of permanent magnet groups, wherein each permanent magnet group consists of a first permanent magnet and a second permanent magnet; the first permanent magnets and the second permanent magnets attract each other end to end; each first permanent magnet is provided with a catheter matched with the first permanent magnet; one end of the catheter passes through the central hole of each first permanent magnet for fixing; and each second permanent magnet is provided with a central hole of which the diameter is larger than the outer diameter of the catheter. Shunt from a portal vein branch to a hepatic vein is completed by using two permanent magnets of corresponding sizes and shapes, so that the defect of gradual narrowing even blockage of an inner support tube for shunting is overcome; moreover, an established sub-channel is smooth on the surface, and can be kept smooth for a long time; and after the formation of a sub-channel between the portal vein branch and the hepatic vein, two magnets can be taken out through the catheter left in the operation, and the retention of foreign matters in vivo is prevented.

Description

technical field [0001] The invention relates to the technical field of a portocavity shunt device for medical equipment, in particular to a magnetic device for establishing an intrahepatic portocavity shunt under intervention. Background technique [0002] At present, the devices that intervene in the inferior portal cavity shunt mainly use the internal support tube device to establish a channel between the portal vein and the inferior vena cava, and insert the internal support tube to realize the portal cavity shunt. However, due to its poor long-term curative effect, the main reason is that the internal support tube used for shunt will gradually narrow or even occlude, which is caused by the excessive hyperplasia of pseudointimal in the support frame. It is reported that the stenosis rate is 40.5% in one year , up to 50.8% in 2 years, these shortcomings have seriously affected the long-term efficacy of the inner support tube device. Contents of the invention [0003] In...

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Problems solved by technology

However, due to its poor long-term curative effect, the main reason is that the internal support tube used for shunt will gradually narrow or even occlude, which is caused by the excessive hyperplasia of pseudointimal in the support frame. It is reported that the stenosis rate is 40.5% in one year , up to 50.8% in 2 years, these shortcomings have seriously affected the long-term efficacy of the inner support tube device

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