Table 1 Mean signal intensities (measured in decibels) pre- and post-circuit for the combined speed data (with and without an oxygenator in the circuit)
Pre-circuit (dB) | Post-circuit (dB) | Difference | p value | |
|---|---|---|---|---|
Oxygenator 150 ml/h | 24.6 ± 1.7 | 18.9 ± 2.4 | 5.7 ± 3.0 | p < 0.0001 |
Oxygenator 300 ml/h | 25.9 ± 1.9 | 20.8 ± 2.6 | 5.1 ± 2.1 | p < 0.0001 |
Oxygenator combined | 25.3 ± 1.9 | 19.9 ± 2.6 | 5.4 ± 2.6 | p < 0.0001 |
No oxygenator 150 ml/h | 30.9 ± 1.3 | 29.6 ± 1.4 | 1.3 ± 1.5 | p < 0.0001 |
No oxygenator 300 ml/h | 30.6 ± 3.1 | 28.8 ± 2.5 | 1.8 ± 1.8 | p < 0.0001 |
No oxygenator combined | 30.8 ± 2.4 | 29.2 ± 2.0 | 1.6 ± 1.7 | p < 0.0001 |