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.

纵隔阻滞与膜外阻滞，膜外阻滞制交感神，明显血流动力学变化，而纵隔阻滞同时制心交感和心迷走神，不明显血流动力学变化。