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.
纵隔阻滞与外阻滞相
,
外阻滞
制交感
,
起明显血流动力学变化,而纵隔阻滞同时
制心交感和心迷走
,不
起明显血流动力学变化。