Door vena hepatica shunts self-expanding stent and implanted deviceTechnical field
Clinical medicine application field.
Background technique
1, Chinese hepatitis B and its caused cirrhosis and mortality of liver cancer account for world's half.China is global pathogenesis of cirrhosisThe highest country of rate, the death rate.
Even if 2, and non-alcoholic big province hepatopathy research institute, Fuzhou City, the investigation of more than 3000 patients is shown, alcoholLiver disease incidence accounts for about the 60% of new hair cirrhosis sum, wherein 80% patient was at 40 years old or so.
Above-mentioned epidemiology can determine, the disease incidence China of cirrhosis not only present highest, still can be very high in 20 years from now on.
And cirrhosis necessarily leads to portal hypertension, then leads to the big bleeding of stomach oesophagus vein, the portal vein counted both at home and abroadThe big bleeding immediate mortality of high pressure is 50% or so.
Traditional portal vein operation cutout and shunting, wound is big, and complication is more, and clinical implementation is less, and Chang great goes outAfter blood occurs.Intervention defensive medicine before big bleeding is clinical extremely rare both at home and abroad.Being shunted through conduit under DSAArt is because there are many complication, also using few.
The invention patent design can use non-operative treatment percutaneously through liver ultrasonic puncture portal vein and vena hepatica itBetween place a bracket so that portal vein blood shunts in controllable range to vena hepatica on a small quantity, to be effectively reducedPortal venous pressure, avoids big bleeding occurs, and has very big value for clinical application.
Summary of the invention
The principal functional structure of the invention patent design is placed in through Ultrasound-guided Biopsy self-expanding stent release (2)Between portal vein (8) and vena hepatica (9), releases and release through release lever (3) in the self-expanding stent (1) of bracket release pipe Inner Front EndDevice is put, through being fixed between portal vein (8) and vena hepatica (9) after self-expanding, a channel is formed, to reach in portal veinBlood to vena hepatica shunting function, can reduce pressure to portal vein, avoid the big bleeding of stomach oesophagus phleborrheixs.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of stenter to implant device
Front end in release (2) pipe is preset self-expanding stent (1), and the rear end in release (2) pipe is provided with self-expanding branchFrame release lever (3), the effect of release lever (3) are that self-expanding stent is released from release (2), are discharged into portal vein and liver is quietBetween arteries and veins.
Fig. 2 be self-expanding stent before releasing after different shape schematic diagram
Fig. 2-1 is planform of the self-expanding stent in release: the compressive state shape (4) of self-expanding stent is in sliceShape, and angle used in multiple fixed backing positions is accompanied on bracket all in compressive state (5).
Fig. 2-2 is the planform that expansion is generated after self-expanding stent is released: self-expanding stent state upon inflation(6) diameter is rendered as obviously to expand.Subsidiary angle has been rendered as unfolded state (7) on bracket.
Schematic diagram when Fig. 3 is self-expanding stent merging and after implantation
Schematic diagram when Fig. 3-1 is self-expanding stent merging: self-expanding stent release (2) is punctured through skin (11) into liver(10), enter vena hepatica (9) again through portal vein (8).
Fig. 3-2 is the schematic diagram after self-expanding stent merging: in portal vein (8), the other end exists for self-expanding stent one endInside vena hepatica (9), to achieve the effect that shunting portal vein enters vena hepatica (blood flow direction of shunting is as shown by arrows).
Specific embodiment
First self-expanding stent release (2) through skin (11) again through liver (10) puncture, eventually pass through portal vein (8) intoEnter vena hepatica (9).
After determining that puncture position is correct, self-expanding under the premise of pushing away self-expanding stent release lever (3) it being made not bounce backBracket release (2) exits liver and skin.
After self-expanding stent release, the self-expanding stent (1) of confined state was in just in release (2) pipe originallyCan by itself stress automatic expansion, become state (6) after self-expanding stent expansion, diameter diffuses into preset size automatically,At this point, self-expanding stent one end is in the portal vein (8), the other end is inside vena hepatica (9), and the fixed feet after being unfolded(7) it is fixed in liver organization, shunts the therapeutic effect that portal vein enters vena hepatica to reach.