INSTRUMENT FOR CAPTURING TISSUE PIECE TO BE USED IN AORTIC VALVE REPLACEMENT SURGERY AND METHOD OF CAPTURING TISSUE PIECE IN AORTIC VALVE REPLACEMENT SURGERY

摘要

Disclosed is an instrument for capturing a tissue piece to be used in aortic valve replacement surgery which can close the aortic valve before removing the valve cusps. An instrument for capturing a tissue piece to be used in aortic valve replacement surgery which can prevent the invasion of the residue of a tissue piece, which is formed in association with the removal of the aortic valve in a surgery for replacing the heart aortic valve, into the left ventricle. This instrument for capturing a tissue piece can be in a contracted state with a shape and size allowing the passage of the same through the space among the aortic valve cusps from the aortic side to the left ventricle side as well as in a dilated state with a shape and size allowing the placement of the same in the vicinity of the aortic valve rings in the left ventricle so as to close the aortic valve. Prior to the surgery for replacing the heart aortic valve, the instrument in the contracted state is passed through the space among the aortic valve cusps from the aortic side to the left ventricle side. After introducing into the left ventricle, the instrument is made into the dilated state so as to close the aortic valve in the vicinity of the aortic valve rings in the left ventricle. Thus, it becomes possible to prevent the invasion of the residue of a tissue piece into the left ventricle.