Figure 2: Cell viability measured by MTT assay. (A): Cell viability measured after HP, there was no statistic difference among all groups. (B): Cell viability measured after I/R injury, Y axis value=OD value(570-630 nm)(HP groups)/OD value(570-630 nm)(normal group)%, *p<0.01, vs. normal group , #p<0.01, vs. I/R group, *p<0.01, vs. 8 h HP group.