Figure 3From: In vitro norepinephrine significantly activates isolated platelets from healthy volunteers and critically ill patients following severe traumatic brain injuryChanges in expression of surface P-selectin in platelets isolated from severe traumatic brain injury patients compared with healthy controls. The relative number of P-selectin-positive arterial and jugular venous platelets was significantly decreased during the second week. * P <0.05 versus controls and first week; analysis of variance on ranks.Back to article page