Skip to main content

Table 2 Comparison of peripheral oxygen saturation (SpO2) and oxygen reserve index (ORI) in patients with and without SpO2  <  97% during endotracheal intubation (ETI)

From: Oxygen reserve index for non-invasive early hypoxemia detection during endotracheal intubation in intensive care: the prospective observational NESOI study

 

Total n  =  51

SpO2  ≥  97% n  =  31

SpO2  <  97% n  =  20

P value

SpO2 at the start of preoxygenation, median [IQR]

97.00 [95.00–99.00]

98.00 [95.00–100.00]

97.00 [95.00–97.00]

0.0951

SpO2 at the end of preoxygenation, median [IQR]

100.00 [99.00–100.00]

100.00 [99.00–100.00]

100.00 [99.00–100.00]

0.5931

SpO2 at ETI, median [IQR]

99.00 [95.00–100.00]

100.00 [99.00–100.00]

93.00 [85.50–97.00]

< 0.0001

ORI at the start of preoxygenation, median [IQR]

0.04 [0.01–0.13]

0.05 [0.02–0.20]

0.04 [0.01–0.12]

0.2891

ORI at the end of preoxygenation, median [IQR]

0.62 [0.26–0.83]

0.71 [0.54–0.94]

0.39 [0.15–0.65]

0.0082

Change in ORI from start to end of preoxygenation, median [IQR]

0.46 [0.15–0.64]

0.52 [0.23–0.82]

0.17 [0.10–0.50]

0.0191

Highest ORI during preoxygenation, median [IQR]

0.67 [0.31–0.94]

0.77 [0.59–1.00]

0.49 [0.22–0.77]

0.0212

Changes in SpO2 from start to end of preoxygenation, median [IQR]

3.00 [1.00–4.00]

2.00 [0.00–4.00]

3.00 [2.00–5.00]

0.1181

  1. SpO2 oxygen saturation by pulse oximeter; IQR interquartile range; ETI endotracheal intubation; ORI oxygen reserve index