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Table 3 Course of Study Intervention

From: Evaluation of two SpO2 alarm strategies during automated FiO2 control in the NICU: a randomized crossover study

 

Loose Alarm Strategy

Tight Alarm Strategy

P

Number of subjects

21

21

Automated FiO2 Settings

 High Target-Range (SpO2%)

95.1 (0.8)

95.0 (0.7)

ns

 Low Target-Range (SpO2%)

88.4 (1.0)

88.5 (1.0)

ns

 High SpO2 Alarm (SpO2%)

98.0 (0.9)

96.3 (0.8)

< 0.001

 Low SpO2 Alarm (SpO2%)

85.6 (1.1)

87.4 (1.0)

< 0.001

 SpO2 alarm delay (sec)

90.0 (2.9)

30.4 (1.7)

< 0.001

Median FiO2 (%)

28.1 (6.2)

30.7 (8.6)

ns

Median SpO2 (%)

92.5 (1.1)

92.1 (1.0)

0.039

SpO2 86–96%* (%time)

89.7(6.8)

91.5 (8.9)

ns

Normoxemia** (%time)

95.2 (3.9)

94.9 (4.6)

ns

Manual FiO2 adjustments (/day)

2 (1–5)

2 (2–3)

ns

  1. * during periods when FiO2 > 0.21, **Normoxemia is defined as SpO2 between 86 and 96% or > 96% if FiO2 = 0.21. P for paired comparison of the mean (SD) or median (25th–75th percentile) with paired t test or Wilcoxon signed-rank test