Figure 2. The relation between the concentration of propofol and platelet aggregation. Data are expressed as means +/- SD. Inhibition: Platelet aggregation was inhibited in samples containing propofol when the same concentration of adenosine diphosphate as when the respective control sample was added, n = 14 (open circles). No inhibition: Platelet aggregation was not inhibited compared with the respective control sample, n = 10 (closed circles).