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首页> 外文期刊>Perfusion >An investigational study of minimum rotational pump speed to avoid retrograde flow in three centrifugal blood pumps in a pediatric extracorporeal life support model.
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An investigational study of minimum rotational pump speed to avoid retrograde flow in three centrifugal blood pumps in a pediatric extracorporeal life support model.

机译：在儿科体外生命支持模型中为避免三台离心血泵逆流而进行的最小旋转泵转速的研究。

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During extracorporeal life support with centrifugal blood pumps, retrograde pump flow may occur when the pump revolutions decrease below a critical value determined by the circuit resistance and the characteristics of the pump. We created a laboratory model to evaluate the occurrence of retrograde flow in each of three centrifugal blood pumps: the Rotaflow, the CentriMag, and the Bio-Medicus BP-50. At simulated patient pressures of 60, 80, and 100 mmHg, each pump was evaluated at speeds from 1000 to 2200 rpm and flow rates were measured. Retrograde flow occurred at low revolution speeds in all three centrifugal pumps. The Bio-Medicus pump was the least likely to demonstrate retrograde flow at low speeds, followed by the Rotaflow pump. The CentriMag pump showed the earliest transition to retrograde flow, as well as the highest degree of retrograde flow. At every pump speed evaluated, the Bio-Medicus pump delivered the highest antegrade flow and the CentriMag pump delivered the least.
机译：在使用离心血泵进行体外生命维持期间，当泵的转速降低到由回路电阻和泵的特性决定的临界值以下时，可能会出现逆行的泵流量。我们创建了一个实验室模型，以评估三个离心式血泵（Rotaflow，CentriMag和Bio-Medicus BP-50）中每一个的逆行血流的发生。在模拟的患者压力分别为60、80和100 mmHg的情况下，以1000至2200 rpm的速度评估每个泵，并测量流速。在所有三个离心泵中，逆流都是在低转速下发生的。 Bio-Medicus泵最不可能表现出低速逆流，其次是Rotaflow泵。 CentriMag泵显示出最早的向逆流过渡，以及最高的逆向流向。在评估的每种泵速下，Bio-Medicus泵提供最高的顺向流量，而CentriMag泵提供的最少。

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