METHOD OF PERFORMING NORWOOD OPERATION, VASCULAR HOMOGRAFT AND METHOD FOR PRODUCING VASCULAR HOMOGRAFT Russian patent published in 2019 - IPC A61B17/00 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine, namely to cardiosurgery. Median sternomia is performed. Pericardium is opened. Aorta, arch and its branches, open arterial duct and pulmonary trunk are mobilized. Pulmonary trunk is injected with an aortic cannula and a right atrium with a venous cannula. Blood circulation is stopped. Right atrium is opened. Interatrial septum is excised. Pulmonary trunk is bifurcated below the bifurcation. Holes in the pulmonary artery are sutured from the arterial duct. Aorta is reconstructed using a flap cut from a pulmonary artery flap so that a bend in the area of the pulmonary artery transition into the pulmonary artery branch is the lower aortic arch wall. Vascular homograft created from a pulmonary artery flap in the form of a tube with a valve located in the middle one-third of the tube is implanted between the hole in the bifurcation of the pulmonary artery and the opening in the wall of the right ventricle. Above operation is performed by means of a vascular homograft represented in the form of a tube, which is created from a flap of the pulmonary artery and contains a bivalve semilunar valve made of the native flap of the pulmonary artery located in the middle one-third of the tube. Vascular homograft is produced as follows. Pulmonary artery flap is cut along. Flap is cut out of it in the form of a strip with expansion on one of the ends and a leaf of the native semilunar valve. Then, the leaf fragment of the native semilunar valve in the lower one-third of the strip is fixed to the edges and the middle of the flap between the fixation points with a suture, which describes two arcs connecting the end points and the fixation point in the middle so that two pockets are connected. Thereafter, flap ends are sutured together to form a tube with a two-wing valve diverging on an upper end.

EFFECT: group of inventions enables to prevent haemorrhage from the jabs when creating an anastomosis, sweating plasma through the wall of the prosthesis, provide unidirectional blood movement, lower risk of such complications as false aneurysm, thrombosis, neointimal proliferation, to select an optimal size of homograft, and also to create a proximal anastomosis between a homograft and a right ventricle, with complete or almost complete excision of a muscular board, which will prevent the development of calcinosis in this area and thereby increase the service life of the homograft.

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