. Author manuscript; available in PMC: 2012 Jul 1.

Published in final edited form as: Arch Dis Child Fetal Neonatal Ed. 2010 Nov 20;96(4):F249–F253. doi: 10.1136/adc.2010.191023

Table 2. Laboratory and physiological measurements before and after transfusion.

	High Hematocrit Group			Low Hematocrit Group

	Pre-Transfusion	Post-Transfusion	P^*	Pre-Transfusion	Post-Transfusion	P^*
Hemoglobin, g/dl	13.6 (1.0)	16.3 (1.6)	<0.0001	9.1 (1.4) ^a	13.1 (1.4) ^b	<0.0001
Hematocrit, %	39 (7)	48 (5)	<0.0001	27 (4) ^a	38 (4) ^b	<0.0001
RBC count, × 10⁶/μl	4.1 (0.7)	5.4 (0.6)	<0.0001	2.9 (0.5) ^a	4.2 (0.6) ^b	<0.0001
Reticulocyte count, × 10³/μl	53 (20)	62 (19)	0.412	53 (16)	61 (21)	0.586
Blood lactic acid, mmol/l	1.1 (0.2)	0.7 (0.1)	<0.0001	1.1 (0.2)	0.9 (0.2)	0.032
Plasma erythropoietin, mU/ml	16 (6)	14 (6)	0.596	16 (7)	14 (5)	0.609
Cardiac output, ml/min per kg	291 (98)	277 (91)	0.402	301 (101)	253 (66)	0.048
Arterial oxygen content, ml/dl	16 (2)	20 (3)	<0.0001	12 (2) ^a	17 (2) ^b	<0.0001
Oxygen consumption, ml/min per kg	8.1 (1.5)	8.1 (1.1)	>0.99	10.0 (1.7)	9.0 (1.1)	0.279
Systemic oxygen transport, ml/min per kg	44 (7)	57 (12)	0.004	33 (4) ^a	41 (5) ^b	0.001
Fractional oxygen extraction	0.20 (0.08)	0.17 (0.08)	0.250	0.31 (0.11) ^a	0.24 (0.12) ^b	0.003
Mean F_iO₂	0.31 (0.09)	0.32 (0.10)	0.561	0.32 (0.11)	0.31 (0.12)	0.055
Mean oxygen saturation, %	96 (3)	96 (3)	0.563	96 (3)	95 (2)	0.333
Mixed venous O₂ content, ml/dl	13 (2)	17 (2)	<0.0001	8 (2) ^a	13 (3) ^b	<0.0001

Values are mean (SD)

Pre-Transfusion vs Post-Transfusion

P<0.05, Pre-Transfusion Low vs Pre-Transfusion High

P<0.05, Post-Transfusion Low vs Post-Transfusion High