Figure 4. The percentage water content (mean +/- SD; wet-dry method) of the percussed (right) hemisphere and in the contralateral (left) hemisphere in animals that underwent isovolemic exchange with whole blood, hetastarch, normal saline, or half-normal saline. Within each group, the water content of the percussed hemisphere was greater than the water content of the contralateral hemisphere. *P < 0.05 versus the corresponding hemisphere in the whole blood and hetastarch groups.