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    • 9. 发明授权
    • Method and apparatus for testing of circumferentially compliant
bioprosthetic valve
    • US5546820A
    • 1996-08-20
    • US339364
    • 1994-11-14
    • Carol E. EberhardtMark J. CappsLuis Salazar
    • Carol E. EberhardtMark J. CappsLuis Salazar
    • A61F2/24G01M10/00F16K37/00
    • A61F2/2412A61F2/2472
    • A fixture for testing a circumferentially compliant bioprosthetic valve. The fixture comprises a silicone rubber simulated aorta which approximates the geometry of a healthy human aorta and a cradle for the aorta. The compliance characteristics of the aorta can be selected by varying the proportions of ingredients in the silicone rubber, so that simulated aortas of different compliance but identical geometries can be provided. The compliant valve is disposed inside the aorta and held in place by suturing or the like. In one embodiment, the aorta and valve are supported by means of a cylindrical cradle, with the inflow and outflow ends of the aorta being folded over cylindrical rims on the respective inflow and outflow ends of the cradle. End caps are then fitted in place over the folded-over ends of the aorta, the end caps having holes therein to allow flow through the aorta and valve. The end caps are provided with O-rings on their outer surfaces, so that the assembled fixture can be inserted into a testing apparatus, with the aorta and valve held in place in the sealed flow loop of the apparatus. In another embodiment, adapter rings are provided for the inflow and outflow ends of the aorta, with the ends of the aorta being folded over cylindrical rims disposed around the inner circumference of each of the adapter rings. The adapter rings are also provided with O-rings, allowing the ends of the aorta to be received in a testing apparatus so that the aorta and valve are disposed along the sealed flow loop of the apparatus.
    • 10. 发明授权
    • Method and apparatus for testing of circumferentially compliant
bioprosthetic valve
    • 用于测量周向顺应生物假体瓣膜的方法和装置
    • US5406857A
    • 1995-04-18
    • US910933
    • 1992-07-09
    • Carol E. EberhardtMark J. CappsLuis Salazar
    • Carol E. EberhardtMark J. CappsLuis Salazar
    • A61F2/24G01M19/00
    • A61F2/2412A61F2/2472
    • A fixture for testing a circumferentially compliant bioprosthetic valve. The fixture comprises a silicone rubber simulated aorta which approximates the geometry of a healthy human aorta and a cradle for the aorta. The compliance characteristics of the aorta can be selected by varying the proportions of ingredients in the silicone rubber, so that simulated aortas of different compliance but identical geometries can be provided. The compliant valve is disposed inside the aorta and held in place by suturing or the like. In one embodiment, the aorta and valve are supported by means of a cylindrical cradle, with the inflow and outflow ends of the aorta being folded over cylindrical rims on the respective inflow and outflow ends of the cradle. End caps are then fitted in place over the folded-over ends of the aorta, the end caps having holes therein to allow flow through the aorta and valve. The end caps are provided with O-rings on their outer surfaces, so that the assembled fixture can be inserted into a testing apparatus, with the aorta and valve held in place in the sealed flow loop of the apparatus. In another embodiment, adapter rings are provided for the inflow and outflow ends of the aorta, with the ends of the aorta being folded over cylindrical rims disposed around the inner circumference of each of the adapter rings. The adapter rings are also provided with O-rings, allowing the ends of the aorta to be received in a testing apparatus so that the aorta and valve are disposed along the sealed flow loop of the apparatus.
    • 用于测试周向顺应性生物假体瓣膜的夹具。 该固定装置包括模拟主动脉的硅橡胶,其近似于健康人主动脉的几何形状和用于主动脉的支架。 可以通过改变硅橡胶中成分的比例来选择主动脉的顺应特性,从而可以提供不同顺应性但相同几何形状的模拟主动脉。 顺应性阀设置在主动脉内部并通过缝合等保持在适当的位置。 在一个实施例中,主动脉和瓣膜通过圆柱形支架支撑,主动脉的流入和流出端折叠在支架的相应流入和流出端上的圆柱形边缘上。 然后将端盖安装在主动脉的折叠端上的适当位置,端盖在其中具有孔以允许流过主动脉和瓣膜。 端盖在其外表面上设置有O形环,使得组装的夹具可以插入到测试装置中,其中主动脉和瓣膜保持在装置的密封流动回路中的适当位置。 在另一个实施例中,为主动脉的流入端和流出端设置适配环,其中主动脉的端部折叠在围绕每个适配环的内圆周设置的圆柱形轮缘上。 接头环还设置有O形环,允许主动脉的端部被接收在测试装置中,使得主动脉和瓣膜沿着装置的密封流动环路设置。