| 摘要 |
A bioprosthetic heart valve comprising a biological transplant on a frame consisting of a supporting ring with struts extending therefrom over a toroidal surface and connected with said ring by arcuate portions of an additional ring, a covering made from a biologically inert material with an isolation spacer, which form a toroidal envelope, the biological transplant secured to the covered-up frame having envelopes shaped like aortic sinuses, joining smoothly the cusps whose number corresponds to the number of envelopes; a method of preparing the biological transplant from the aortic valve of an animal or human being comprising the dissection of the aortic root with aortic valve and cutting out a transplant with cusps, fibrous ring and aortic sinuses from a flap of biological tissue with the aid of a device comprising a punch and two matrix plates, said punch being made in the form of a plate with projections and bulges thereon, entering the cutouts on the matrix plates, and a method for preparing the biological transplant from a flap of biological tissue with the aid of said device comprising simultaneous forming of cusps and envelopes smoothly mating therewith and suturing them up along the conjugate line through a reinforcing spacer. A method of preparing the bioprosthetic heart valve comprising the suturing of the biological transplant to the supporting and additional frame rings through the upper and lower edges of envelopes shaped like aortic sinuses. |
