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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