Passiveleg raising(PLR) is a new method for predicting volume responsiveness.
被动抬腿试验（PLR）是预测容量反应性的一种新方法。
2
In contrast, performing a passiveleg-raising test has been proved as valuable for this purpose.
相比之下，被动抬腿试验则更好地实现了这一目的。
3
The research work of this dissertation establishes theoretical basis for the further research of the 3-DOF parallel manipulator with one passiveleg practically.