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Table 2 Breathing pattern and gas exchange in different experimental conditions

From: High-flow oxygen therapy in tracheostomized patients at high risk of weaning failure

  HF-T 1 Conventional O2 HF-T 2 p
RR (breaths/min) 19.4 ± 3.9 20.1 ± 4.3 20.4 ± 5.4 0.94
TiNEUR (s) 1.07 ± 0.21 1.03 ± 0.2 1.02 ± 0.24 0.88
pH 7.51 ± 0.04 7.51 ± 0.04 7.52 ± 0.04 0.76
PaCO2 (mm Hg) 44 ± 9 44 ± 8 43 ± 8 0.93
HCO3 (mEq/L) 33 ± 4.5 33 ± 4 33 ± 4 0.99
PaO2 (mm Hg) 109 ± 27 92 ± 17 111 ± 28 0.09
PaO2/FiO2 219 ± 59 187 ± 50 223 ± 45 0.13
  1. Data are expressed as mean ± standard deviation
  2. HF-T, high-flow tracheotomy cannula oxygen therapy; conventional O2, conventional low-flow oxygen therapy through a T-piece; RR, respiratory rate; TiNEUR, neural inspiratory time; PaCO2, arterial partial carbon dioxide pressure; PaO2, arterial partial oxygen pressure; FiO2, inspiratory oxygen fraction