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Table 2 Baseline tissue oxygen saturation, deoxygenation and reoxygenation rates between sites and between probe sizes

From: Characterization of tissue oxygen saturation and the vascular occlusion test: influence of measurement sites, probe sizes and deflation thresholds

Probe

Thenar eminence

Coefficient of variability (%)

Forearm

Coefficient of variability (%)

P valuea

15 mm

   Absolute StO2 (%)

90.4 (85.2, 93.5), 76.6 to 95.3b

5.6

85.2 (80.7, 90.2), 65.8 to 93.6b

7.8

0.031

   DeO2 (%O2/minute)

-12.8 (-16.2, -11.3)

26.1

-8.5 (-10.3, -7.8)

42.7

0.011

ReO2

(%O2/minute)

297.2 (213.7, 328.6)

21.5

98.6 (53.7, 157.8)

68.4

< 0.0001

25 mm

   Absolute StO2 (%)

92.7 (89.4, 94.7), 81.9 to 95.9b

4.6

87.3 (81.7, 90.9), 76.0 to 95.2b

6.7

0.016

DeO2

(%O2/minute)

-18.0 (-24.1, -14.8)

36.5

-9.9 (-15.3, -6.5)

53.6

< 0.0001

   ReO2 (%O2/minute)

401.6 (331.7, 543.2)

28.2

160.5 (132.3, 366.9)

66.8

0.012

Comparison of 15 mm vs. 25 mm probe (P value)

   StO2

0.020

    

   DeO2

< 0.0001

    

   ReO2

< 0.0001

    
  1. Baseline tissue oxygen saturation (StO2), deoxygenation rate (DeO2) and reoxygenation rate (ReO2) between the thenar eminence versus forearm and between the 15 mm probe versus 25 mm probe. Data presented as the median (interquartile range). aThenar eminence versus forearm comparison. bAbsolute StO2 range.