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Table 4 Changes in microvascular variables as mean arterial pressure was increased from 65 mmHg to 85 mmHg with norepinephrine

From: Increasing arterial blood pressure with norepinephrine does not improve microcirculatory blood flow: a prospective study

  Mean arterial blood pressure ANOVA Linear trend
  65 mmHg 75 mmHg 85 mmHg P P
Vascular density (vessels/mm2)      
   Large diameter vessels 11 ± 1 10 ± 3 10 ± 3 0.81 0.61
   Medium diameter vessels 15 ± 3 16 ± 4 16 ± 4 0.82 0.53
   Small diameter vessels 24 ± 8 23 ± 8 22 ± 1 0.09 0.03
Microvascular flow index      
   Large diameter vessels 2.3 ± 0.6 2.3 ± 0.8 2.2 ± 0.8 0.34 0.16
   Medium diameter vessels 2.2 ± 0.7 2.2 ± 0.7 2.1 ± 0.9 0.79 0.52
   Small diameter vessels 2.1 ± 0.7 2.2 ± 0.7 2.0 ± 0.8 0.69 0.47
Perfused vessels (%)      
   Large diameter vessels 82 ± 21 80 ± 28 87 ± 6 0.46 0.40
   Medium diameter vessels 77 ± 27 77 ± 29 77 ± 6 0.98 1.00
   Small diameter vessels 72 ± 26 71 ± 27 67 ± 32 0.55 0.38
   Total vessels 75 ± 25 75 ± 27 76 ± 4 0.92 0.73
Heterogeneity flow index      
   Large diameter vessels 1.0 ± 0.5 1.3 ± 1.2 1.5 ± 1.4 0.07 0.02
   Medium diameter vessels 1.6 ± 1.6 1.5 ± 1.4 1.7 ± 1.2 0.86 0.78
   Small diameter vessels 1.8 ± 1.3 1.8 ± 1.2 1.7 ± 1.1 0.97 0.80
  1. ANOVA = analysis of variance.