Table 1

Example of microvascular flow index calculation for a (sublingual) microvascular network
Flow
 Quadrant A
 Quadrant B
 Quadrant C
 Quadrant D
 MFI
Small
 2
 3
 3
 2
 10/4 = 2.5
Medium
 1
 3
 3
 3
 10/4 = 2.5
Large
 -
 3
 3
 -
 6/2 = 3

MFI, microvascular flow index.

Boerma et al. Critical Care 2005 9:R601   doi:10.1186/cc3809