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Table 3 Changes in microcirculatory parameters monitored by near-infrared spectroscopy and use of a vascular occlusion test in the two neuromuscular electrical stimulation (NMES) protocols

From: Acute microcirculatory effects of medium frequency versus high frequency neuromuscular electrical stimulation in critically ill patients - a pilot study

  HF protocol (n = 17) MF protocol (n = 14)
Microcirculatory parameter Before After P Before After P
Tissue oxygenation (StO2) 79 ± 10 77 ± 11 0.06 76 ± 10 75 ± 11 0.6
StO2 downslope (%/minute) 8.6 ± 2.2 9.9 ± 5.1 0.08 8.8 ± 3.8 9.9 ± 3.6 0.07
StO2 upslope (%/second) 2.7 ± 1.4 3.2 ± 1.7 0.04 2.5 ± 1.4 3.1 ± 1.7 0.03
Time to baseline (seconds) 160 ± 55 145 ± 49 0.03 163 ± 37 144 ± 33 0.001
  1. Legend: HF, high frequency; MF, medium frequency: StO2, tissue oxygen saturation.