Figure 2
From: Supporting hemodynamics: what should we target? What treatments should we use?
Sodium excretion and mean arterial pressure during controlled hemorrhage and reinfusion. The amount of sodium excreted (computed as the product of sodium concentration and urine amount) in 30 minutes (black circles) and the mean arterial pressure (MAP; grey triangles) during controlled hemorrhage and reinfusion (grey area plot) in an experimental swine model. Vertical grey dashed lines indicate the end of baseline/beginning of hemorrhage, end of hemorrhage/beginning of reinfusion and end of reinfusion. As shown, the kidney reacts to the blood volume decrease by retaining sodium and reducing urine volume earlier than significant changes in MAP may be detected. Courtesy of Dr A Protti.