【摘要】 【目的】评价可变频率模式运行下的推板式左心血泵的体外模拟试验。【方法】在模拟台上 ,分别以可变频率模式和固定频率模式运行推板血泵 ,先后改变充盈压和主动脉压 ,记录泵输出量和搏动频率 ,比较两种模式的血泵性能。【结果】可变频率模式下的推板血泵能根据回心血流压力大小来控制搏动频率和泵输出量 ,比较符合生理特性。【结论】可变频率模式结构简单实用 ,运行可靠 ,性能优越 ,比固定频率模式和心电模式更先进。更多还原

【Abstract】 Objective To evaluate the in vitro mock test of push-plate left ventricular assist device operated in variable rate mode. Methods The push-plate pump in mock loop was run in variable rate mode or fixed rate mode. The filling pressure and aorta pressure were adjusted respectively, and the pump output and rate were recorded. Pump performances of the two modes were compared. Results The push-plate pump run in variable rate mode could control its rate and output based on the filling pressure back to ventricle of heart, and better agree with physiological parameters. Conclusion The variable rate mode is simple in structure, reliable in running, perfect in performance, and is a more excellent mode than the fixed rate mode and the ECG mode.更多还原