Dynamic Arterial Elastance: an Indirect Marker of the Critical Capillary Pressure at the Microcirculatory Level

Volume expansion when the patient has a dependent preload evaluated by a positive leg lever test (variation of more than 10% of the VES). It corresponds to the intravenous administration of 500 ml of Ringer lactate over 10 min.

Vasopressor agent when the patient has persistent arterial hypotension related to postoperative vasoplegia syndrome. Norepinephrine is administered during persistent hypotension (MAP \<60mmHg) despite volume expansion. It corresponds to continuous intravenous norepinephrine administration to obtain a MAP of more than 70 mmHg