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Table 3 Changes in microvascular flow index and proportion of perfused vessels before and after RBC transfusion

From: Sublingual microcirculation does not reflect red blood cell transfusion thresholds in the intensive care unit—a prospective observational study in the intensive care unit

 MFI, median (IQR)p valuePPV, median (IQR)p valueTVD, median (IQR)p valuePVD, median (IQR)p value
Before RBCTAfter RBCTBefore RBCTAfter RBCTBefore RBCTAfter RBCTBefore RBCTAfter RBCT
All2.75 (2.33–2.91)2.83 (2.60–2.91)0.00283.3 (70.5–89.7)85.3 (78.4–90.0)0.00110.38 (9.51–11.62)11.27 (10.23–12.45)0.0058.68 (6.95–9.74)9.60 (8.35–10.46)< 0.001
Septic2.41 (2.00–2.77)2.91 (2.91–3.00)0.00871.7 (66.3–85.3)89.2 (86.4–92.6)0.001      
TTH 75 g/l2.70 (2.33–2.91)2.83 (2.64–2.91)< 0.00182.8 (67.9–89.6)85.3 (79–89.5)< 0.001      
TTH 90 g/l2.75 (2.41–2.62)2.75 (2.5–2.91)0.66582.7 (71.6–88.4)86.3 (74.5–91.3)0.308      
  1. RBCT red blood cell transfusion, MFI microvascular flow index, IQR interquartile range, PPV proportion of perfused vessels, TVD total vessel density, PVD perfused vessel density, TTH transfusion threshold