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.

纵隔与硬膜外相比，硬膜外感神经，引起明显血流动力学变化，而纵隔同时心感和心迷走神经，不引起明显血流动力学变化。