【摘要】 为了观察国产久灵全热解碳双叶瓣的跨瓣压差 ,对久灵瓣作了实验室流体力学进行流体力学测试。通过自编数据处理程序对参数进行自动分析。 2、动物实验测定 :手术中对置换 2 1m m型号二尖瓣的 6只羊用双导管法测定血流动力学 ;对 2只术后存活 2 .5年的羊先用超声法 ,然后用导管法并在多巴酚丁胺负荷下作血流动力学测定。 3、临床病人测定 :对 14例主动脉瓣和 10例二尖瓣用导管法和超声法测定。结果 :1、实验室测定 :测试瓣的Δ P,均随心率增加而减低 ,Δ P在 10 mm Hg以下。 2、动物实验 :术中 6只羊的ΔP,导管法 :5 .2± 1.7mm Hg。 2只术后 2 .5年羊的Δ P,超声法 :6 .8mm Hg。3、临床病人 :14例主动脉瓣ΔP,导管法 :6 .2 4～ 4 .10 mm Hg;超声法 :9.4 2～7.4 8mm Hg。二尖瓣Δ P,导管法 :2 .1～ 1.9m m Hg;超声法 :5 .3～ 4 .1mm Hg。结论 :国产久灵全热解碳双叶瓣平均跨瓣压差较低 ,具有良好的血流动力学效果更多还原

【Abstract】 In order to assess the transvalvular gradient of a Chinese made Jiuling solid pyrolytic carbon bileaflet heart valve prosthesis, we determined its hydrodynamics in the laboratory and then measured the hemodynamic performance in the animals and patiens. The Jiuling prosthesis was tested in a pulsatile flow simulator in the aortic position. Six sheep subjected to mitral replacement with 21 mm Jiuling prosthesis were measured by open cardiac catheterization intraoperatively. Doppler echocardiography and open cardiac catheterization under dobutamine stress were performed in two sheep 60 months after implantation. Clinically, 14 cases of aortic valve and 10 cases of mitral valve in the patients who underwent valve replacement with Jiuling heart valve prosthesis were measured by open cardiac catheterization and Doppler echocardiopgraphy. The results showed that Juiling heart valve prosthesis had lower mean transvalvular gradient (below 10 mmHg) at any given tissue annulus diameter. In animal experiments, the transvalvular gradients of 6 sheep were 5.2±1.7 mmHg intraoperatively, and of 2 sheep 60 months after implantation were 6.1±0.3 mmHg by catheterization. In patients, the mean transvalvular gradients in the aortic position measured by means of catheterization and echocardiography were 6.26 4.10 mmHg and 9.42 7.48 mmHg;the gradients in the mitral position were 2.10 1.9 mmHg and 5.28 1 4.10 mmHg respectively. The above results demonstrate that Jiuling valve prosthesis has excellent hemodynamic performance.更多还原