In order to evaluate the colloid oncotic pressure (COP) is useful index of hemodynamics and respiratory recovery after open heart surgery, cardiac index (CI), pulmonary capillary wedge pressure (PCWP), (A-a) Do2 and COP were measured in 34 patients during 48 hours after the cardiopulmonary bypass (CPB). The patients were divided into non-blood priming group: 11 patients and blood priming group (23 patients). In addition, blood priming group divided into two groups, one with dopamine (more than 15 micrograms/kg/min), epinephrine or intraaortic balloon pumping (severe blood subgroup, n = 6) and the other without these treatments after open heart surgery (slight blood subgroup n = 17). The COP levels in the non-blood priming group were significantly higher than those in the blood priming group from aortic cross-clamp to 10 minutes after aortic declamping (p < 0.01). From 1 to 48 hours after CPB, COP in the non-blood priming group and slight blood subgroups was significantly higher than severe blood subgroups (p < 0.05). CI and COP-PCWP levels were significantly higher in the non-blood priming group and slight blood subgroups than those in the severe blood group (p < 0.05). It is concluded that COP is useful index of hemodynamics and respiratory recovery after open heart surgery and our priming system without blood is effective in order to eliminate the blood transfusion.
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