METHOD OF AORTIC AND PULMONARY ARTERY HOMOGRAFT ISOLATION FROM DONOR HEART Russian patent published in 2009 - IPC A61B17/00 A61F2/24 A61F2/06 

FIELD: medicine; cardiosurgery.

SUBSTANCE: fragments aorta and pulmonary artery together with a valve unit are isolated from donor heart in sterile conditions. Then isolated homografts are estimated for adaptability. The fragments of aorta and pulmonary artery together with the valve unit are isolated in a sequence as follows: aorta and pulmonary artery are divided to fibrous rings of aortic and pulmonary valves; it is followed with excision of distal parts of pulmonary artery 2 cm away from artery mouths; left and right coronary arteries are isolated from epicardium and cut off 0.7-1 cm away from mouths; right ventricle of heart and interventricular septum are cut off 2-2.5 cm away from pulmonary valve in parallel to coronary transverse from heart edge to interventricular septum; then pulmonary homograft with muscular flange 2-2.5 cm of right ventricle of heart is isolated from fibrous ring, while aortic homograft with a flange 1.5-2 cm is isolated from fibrous ring of valve, herewith mitral valve anterior leaflet is left without chords to be cut off with shortening muscular flanges of transplants up to 0.5 cm in width and thickness. To test the valve unit for adequacy, homografts are turned inside out to make a visual inspection of valves, sinuses and vascular walls.

EFFECT: method allows standardising tissue preparation for transplantation, reducing number of damages of valve unit, isolated homografts, decreasing defect ratio and reduction cost price of commercial homografts, improving functional reliability of a transplant due to removal of models with border changes of valve tissues observed.