Table 4.
Sublingual microvascular flow for small vessels (< 20 μm) during eight hour study period
| Hour 0 | Hour 2 | Hour 4 | Hour 6 | Hour 8 | ||
|---|---|---|---|---|---|---|
| Microvascular Flow Index | CVP | 2.5 (0.3) | 2.5 (0.7) | 2.6 (0.4) | 2.6 (0.4) | 2.5 (0.5) |
| SV | 2.5 (0.4) | 2.5 (0.5) | 2.6 (0.4) | 2.7 (0.3) | 2.6 (0.4) | |
| † SV & DPX | 2.5 (0.4) | 2.4 (0.5) | 2.5 (0.4) | 2.7 (0.3) | 2.5 (0.4) | |
|
Perfused vessel density (mm-1) |
‡ CVP | 6.1 (2.4) | 6.1 (1.7) | 5.8 (2.0) | 5.8 (1.9) | 5.3 (1.8) |
| SV | 5.8 (2.5) | 5.7 (2.6) | 5.7 (1.9) | 5.7 (1.9) | 6.2 (3.0) | |
| † SV & DPX | 5.8 (2.4) | 5.5 (2.4) | 5.9 (2.8) | 6.2 (1.8) | 6.3 (3.0) | |
| Proportion of perfused vessels | CVP | 0.83 (0.14) | 0.83 (0.12) | 0.81 (0.14) | 0.82 (0.18) | 0.81 (0.18) |
| SV | 0.80 (0.15) | 0.80 (0.21) | 0.82 (0.17) | 0.84 (0.13) | 0.80 (0.19) | |
| SV & DPX | 0.81 (0.16) | 0.77 (0.14) | 0.81 (0.15) | 0.85 (0.12) | 0.87 (0.17) | |
| Heterogeneity index | CVP | 0.39 (0.23-0.51) |
0.23 (0.12-0.41) |
0.25 (0.17-0.48) |
0.28 (0.16-0.38) |
0.25 (0.10-0.54) |
| SV | 0.23 (0.10-0.43) |
0.20 (0.07-0.31) |
0.22 (0.04-0.41) |
0.19 (0.06-0.31) |
0.22 (0.08-0.46) |
|
| † SV & DPX | 0.27 (0.18-0.40) |
0.20 (0.14-0.44) |
0.18 (0-0.27) |
0.13 (0.08-0.27) |
0.17 (0-0.38) |
Data presented as mean (standard deviation) or median (interquartile range). Significant changes over time signified by † (P < 0.05), ‡ (P < 0.01). CVP, central venous pressure; DPX, dopexamine; SV, stroke volume.