“…Since it has been shown that 1131 H.S.A. remains intravascular during this period (Lilienfield et al, 1956;Tuckman et al, 1959), we conclude that this is also true for the dye. These findings are consistent with the work of Taylor and Shillingford (1959) who found that the cardiac output measured by both Coomassie Blue (indicator dilution method) and the direct Fick method were not significantly different.…”