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.

纵隔阻与硬膜外阻，硬膜外阻制交感神经，显血流动力学变化，而纵隔阻同时制心交感和心迷走神经，不显血流动力学变化。