Figure 3
Left kidney, right kidney, and thigh near infra-red spectroscopy (NIRS) are compared to direct kidney tissue oxygen measurements over time for 4 animals undergoing the Hemodilution protocol. The red line marked “H” represents the start of each hemorrhage. The gray line marked “F” represents the end of each hemorrhage and the start of a bolus of balanced crystalloid. The orange line marked “BR” represents the time when shed blood was returned to the animal. For the resuscitative endovascular balloon aortic occlusion (REBOA) protocol, the red line marked “H” represents the start of the hemorrhage period. The gray line marked “AO” represents the start of aortic occlusion. The blue line marked “AR” represents the end of aortic occlusion when the aortic balloon was gradually released. For all graphs, the red solid and dashed lines indicate left and right kidney NIRS respectively and the blue solid line indicates thigh NIRS. The black solid line represents kidney tissue oxygen concentration. NIRS data were sampled every 2 s and kidney tissue oxygen was sampled every second.
