Table 3

Microcirculation

Assist ratio 1:1

No assist

Difference

95% CI lower boundary

95% CI upper boundary

P-value

PVD vessels <20 μm (mm^-1)

5.47 (1.76)

6.63 (1.90)

-1,16

-1.89

-0.44

0.0039

PPV vessels <20 μm (mm^-1)

88.4 (14.1)

88.8 (16.4)

-0,43

-6.49

5.61

0.879

MFI vessels <20 μm

2.75 [2.0 to 3.0]

3.0 [2.58 to 3.0]

-0.25

NA

NA

0.422

HI-PVD vessels <20 μm

0.38 (0.23)

0.40 (0.37)

-0,02

-0.19

0.15

0.834

HI-MFI vessels <20 μm

0.68 (0.68)

0.57 (0.87)

0,11

-0.27

0.49

0.547

PVD vessels >20 μm (mm^-1)

1.34 (0.88)

1.64 (0.63)

-0,31

-0.83

0.21

0.222

PPV vessels >20 μm (mm^-1)

95.5 (9.6)

96.9 (7.7)

-1,38

-4.94

2.18

0.420

MFI vessels >20 μm

3.0 [2.5 to 3.0]

3.0 [2.78 to 3.0]

0

NA

NA

0.109

HI-PVD vessels >20 μm

0.59 (0.25)

0.50 (0.25)

0,08

-0.08

0.25

0.299

HI-MFI vessels >20 μm

0.44 (0.58)

0.18 (0.29)

0,26

-0.05

0.57

0.096

MFI is reported as median with interquartile ranges in square brackets. Other microcirculatory parameters are mean values ± standard deviation in parentheses. CI, confidence interval; HI, heterogeneity index; MFI, microvascular flow index; NA, not applicable; PPV, percentage of perfused vessels; PVD, perfused vessel density.

Munsterman et al. Critical Care 2010 14:R161   doi:10.1186/cc9242