Fig. 4From: Respiratory acidosis during bronchoscopy-guided percutaneous dilatational tracheostomy: impact of ventilator settings and endotracheal tube sizeCorrelation of transcutaneous PCO2 (PtcCO2) and arterial PCO2 (PaCO2) (a). Corresponding Bland-Altman analysis are given in (b). (r - spearman’s correlation; LoA - Limits of Agreement). Please note that the bias line for the Bland-Altman analysis is not visible due to the observation that the bias was close to zeroBack to article page