Abstract
Blood trauma was estimated in 68 consecutive adult patients who underwent open heart surgery without blood transfusion during CPB so as to clarify possible differences among three centrifugal pumps (BP-80: 20 patients; HPM-15: 18 patients; SP45: 24 patients) and roller pump (R, 6 patients). Serum hemoglobin (S-Hb) and platelet counts (PLT) were measured before (just after induction of anesthesia) and during CPB. Each value was corrected by hemodilution, and the amount of increase of S-Hb (ΔS-Hb) and the degree of PLT change from the value before CPB (%PLT) were calculated and compared. Although ΔS-Hb gradually increased during CPB, the values of the four groups did not show any significant deference. The %PLT, on the other hand, decreased during CPB, but we could not find any significant difference among the four groups. We conclude from these findings that the centrifugal pump and the roller pump may cause blood trauma in the same degree during short-term CPB in adult patients.
