MB leads little changes of hemodynamics due to inhibit cardiac sympathicotonia and pneumogastric nerve simultaneity, but TEB brings the evident changes due to only inhibit pneumogastric nerve.

纵隔与硬膜相比，硬膜神经，引起明显血流动力学变化，而纵隔同时心和心迷走神经，不引起明显血流动力学变化。