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Table 3 Sidestream Dark Field-derived microcirculatory variables before and 1 hr after red blood cell transfusion

From: The effect of red blood cell transfusion on tissue oxygenation and microcirculation in severe septic patients

Subgroup Baseline    After transfusion  
Measurement Vessel size n Mean (SD) Mean (SD) p
Total vessel density (mm/mm2) Small 11 22.4 (5.9) 21.5 (5.5) 0.36
Total vessel density (mm/mm2) Large 11 3.4 (1.3) 3.9 (1) 0.2
Total vessel density (mm/mm2) All 11 25.7 (6.4) 25.4 (6) 0.73
Perfused vessel density (mm/mm2) Small 11 9.5 (4.8) 9.4 (4.8) 0.91
Perfused vessel density (mm/mm2) Large 11 3 (1.5) 3.7 (1.2) 0.09
Perfused vessel density (mm/mm2) All 11 12.5 (5.4) 13.3 (4.7) 0.53
Proportion of perfused vessels (%) Small 11 37.6 (21.5) 38.2 (21.8) 0.85
Proportion of perfused vessels (%) Large 11 100 100 1
Proportion of perfused vessels (%) All 11 51.6 (23.8) 53.9 (20.9) 0.45
De Backer score (n/mm)   11 14.7 (3.8) 14.8 (3.5) 0.91
Microvascular Flow Index Small 11 1.6 (0.7) 1.6 (0.7) 0.76
Microvascular flow index All 11 2.3 (0.4) 2.4 (0.3) 0.3
Heterogeneity index (%)   11 0.3 (0.2) 0.4 (0.3) 0.19