Fig. 2From: Respiratory acidosis during bronchoscopy-guided percutaneous dilatational tracheostomy: impact of ventilator settings and endotracheal tube sizePaCO2 during dilatational tracheostomy. Tidal volume was set to 6 ml/kg PBW for the entire period. *p ≤ 0.05, **p ≤ 0.01 and ***p ≤ 0.001. (ET - endotracheal tube, I.D. - internal diameter). Data were analyzed according to the diameter of the tube (a: 7.5mm, b: 8.0mm and c: 8.5mm)Back to article page