Vena cava-atrium dextrum covered stent of tricuspid insufficiency functional correction

Abstract

Cava-Right Atrium Stent Graft for Functional Correction of Tricuspid Regurgitation. A vena cava-right atrium covered stent that connects the superior and inferior vena cava and the right atrium as a whole and is inserted through a percutaneous catheter. Both ends are adapted to the superior and inferior vena cava to form an inflow channel; the middle part is enlarged to adapt to the right atrium to form a blood storage pool. There is a filter screen to prevent pulmonary embolism in the blood discharge port of the stent, and a one-way diversion valve on the outside. During diastole, the negative pressure in the right atrium and the room pushes the blood away from the one-way guide valve of the blood outlet to enter the right atrium and right ventricle; during systole, the positive pressure of the right atrium and the room makes the one-way guide valve of the blood outlet close , to prevent backflow of blood into the stent graft. In the accompanying drawings, 1. The opening of the superior vena cava of the stent, 2. The crown of the covered stent, 3. The body of the superior vena cava of the covered stent, 4. The memory alloy wire of the covered stent, 5. The right atrium body of the covered stent (blood pool ), 6. Covered stent blood outlet and anti-embolism filter, 7. One-way diversion valve, 8. Covered stent inferior vena cava body, 9. Stent inferior vena cava opening.

Description

technical field [0001] The invention relates to a covered stent for minimally invasive treatment of cardiovascular diseases, in particular to a vena cava-right atrium covered stent capable of solving the problem of right heart dysfunction caused by tricuspid regurgitation. Background technique [0002] The pathophysiological changes of the tricuspid valve insufficiency are mainly manifested in two aspects: one is that the tricuspid valve regurgitation causes the right ventricular load to increase, and then the right ventricle expands, the right heart is insufficient, the tricuspid valve ring expands, and the tricuspid valve The reflux further increases, forming a vicious circle; the second is that the blood reflux causes high pressure in the right atrium, the resistance of the vena cava to the heart increases, and the high pressure in the venous system leads to blood stasis and dysfunction of important organs, such as chronic liver and renal insufficiency, Digestive disorder...

AI Technical Summary

Problems solved by technology

Aiming at the main pathophysiological changes of tricuspid regurgitation and avoiding the above-mentioned difficult problems of anatomical correction, the present invention provides a covered stent, which can not only be implanted in a minimally invasive way, but also can solve the problems caused by the three Functional problems of venous system hypertension, vital organ stasis, and central hypoxemia caused by cusp regurgitation

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