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作者引入并定义了两种可反映心脏能量供求情况的能量函数。并用这两种能量函数对二级和三级序贯式反搏从能量角度加以研究,着重考察了各级反搏气囊充气时间差和保压时间长度对能量供求情况的影响。仿真实验结果表明,两种能量函数极大值的取得是在同一组反搏条件下,而且这组反搏条件恰是从血液动力学角度研究体外反搏时得到的最优反搏条件,即使综合指标Q_P(主动脉舒张压与收缩压之比)取得极大值的反搏条件。仿真结果还表明,从能量角度看三级序贯式反搏确实优于二级反搏。另外,经比较表明所报道的仿真结果与临床结果是一致的。
The authors introduced and defined two energy functions that reflect the supply and demand of cardiac energy. The two kinds of energy functions are used to study the secondary and tertiary sequential counterpulsation from the energy point of view. Emphasis is placed on the effects of inflation time and dwell time on the supply and demand of energy. The simulation results show that the maximum of two kinds of energy functions are obtained under the same group of counterpulsation conditions, and this group of counterpulsation conditions is exactly the optimal counterpulsation condition obtained from the hemodynamic study of extracorporeal counterpulsation. Even if The composite index Q_P (aortic diastolic blood pressure and systolic blood pressure ratio) to obtain the maximum value of the ESP conditions. Simulation results also show that from the energy point of view three-stage sequential counterpulsation is superior to the second-stage counterpulsation. In addition, comparison shows that the reported simulation results are consistent with the clinical results.