Fig. 2From: Hemodynamic effects of supplemental oxygen versus air in simulated blood loss in healthy volunteers: a randomized, controlled, double-blind, crossover trialLower body negative pressure (LBNP) protocol. After a 3-min baseline period and 5-min run-in time of the treatment (oxygen or air), LBNP was increased by 10 mmHg starting from 0 mmHg every 3 min to simulate progressive blood loss until completing LBNP 80 or stopping due to hemodynamic decompensationBack to article page