In Cohort 2, 18 patients will be randomized 2:1 to receive either 2.0 mL/kg Oxycyte (1.2 g/kg; n=12) or NS (n=6). The DSMB will then review the safety data for all patients in Cohort 2 through Day 14 and either approve escalation to the highest dose or remain at the current dose. If remaining at the current dose level (Cohort 2) an additional 50 patients will be randomized 1:1 to Oxycyte (n=25) or NS (n=25) and treated.