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Table 1 Patient characteristics

From: Lung aeration and ventilation after percutaneous tracheotomy measured by electrical impedance tomography in non-hypoxemic critically ill patients: a prospective observational study

  BMI (kg/ m2) Age (years) SAPS II TISS-28 Horovitz index (mm Hg) Compliance (ml/mbar) Duration of MV (h)
Mean 26 62 43 17 296 35 272
SD ± 6 ± 11 ± 13 ± 6 ± 97 ± 8 ± 131
  1. BMI body mass index; SAPS II simplified acute physiology score II [36]; TISS-28 therapeutic intervention scoring system [37]; Horovitz index ratio of arterial partial pressure of oxygen and inspiratory fraction of oxygen; SD standard deviation; MV mechanical ventilation