near-significantp = 0.0625
WOB measurements (Joules/min and Joules/L) were possible in 5 patients, indicating near-significant higher values when stopping the sweep gas flow for a 1 h. period- 11.7[7.5 ± 15.0] versus 22.6[13.9 ± 34.7] J/min, p = 0.0625 and 1.1[0.8 ± 1.4] versus 1.5[0.9 ± 2.8] J/L, p = 0.0625.