Abstract
We measured the serum ionized calcium concentration (Ca++) in 27 patients who received ACD blood transfusion ranged from 400ml to 4200ml during general anesthesia. Ca++ was measured prior to transfusion, at various intervals and at the end of transfusion.
Ca++ decreased immediately after the transfusion, from 2.13±0.14mEq/l at the baseline to 1.92±0.20 mEq/l (p<0.05) following the 200ml of transfusion and tended to decrease with additional transfusion up to 600ml of blood. The lowest value of Ca++ was 1.78±0.28mEq/l at the 2400-4200ml of transfusion. All values were significant (p<0.05) to baseline, but not significant between each other. We observed no correlation between the rate of transfusion and the decline of Ca++.
8 patients who received 1350ml of transfusion on the average, were administered 5ml of 8.5% calcium gluconate after the termination of trantfusion. Ca++ increased from 1.72±0.16mEq/l to 2.06±0.21mEq/l (p<0.05) 5min after the administration, and returned to the normal value.
