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Table 1 NIRS variables and systolic blood pressure before each vascular occlusion test.

From: 500 ml of blood loss does not decrease non-invasive tissue oxygen saturation (StO2) as measured by near infrared spectroscopy - A hypothesis generating pilot study in healthy adult women

Blood donors Before blood donation After blood donation  
  median IQR median IQR two-tailed p-value
StO2 79.0 74.5 - 83.5 78.5 75.0 - 83.0 0.34
O2Hb 10.7 9.3 - 11.9 10.8 8.9 - 11.7 0.43
deoxy Hb 2.62 2.39 - 3.24 2.70 2.34 - 4.39 0.30
SBP 118 118 - 123 110 106 - 115 <0.001*
Control Before rest period After rest period (19 minutes)  
  median IQR median IQR two-tailed p-value
StO2 82.0 79.5 - 85.0 80.5 76.8 - 83.8 <0.05*
O2Hb 10.9 9.6 - 12.4 10.2 9.4 - 11.8 <0.05*
deoxy Hb 2.35 2.08 - 2.56 2.45 2.20 - 2.92 <0.01*
SBP 112 103 - 118 106 100 - 111 <0.05*
  1. IQR: interquartile range, *: p < 0.05