Real-time ultrasound-guided laryngeal mask assisted percutaneous dilatational tracheostomy versus bronchoscopy-guided percutaneous dilatational tracheostomy in critically ill patients: a randomized controlled trial

Table 2 Procedure-related characteristics of the studied groups (N = 60)

Variables	Bronchoscopy-guided (n = 30)	Ultrasound-guided LMA-assisted (n = 30)	P-value
Tracheal ring position, n (%)			0.189
Between 1st and 2nd	7 (24.1)	3 (10.0)
Between 2nd and 3rd	21 (72.4)	27 (90)
Between 3rd and 4th	1 (3.4)	0 (0.0)
Procedure time, min	35 [28–39]	17 [15–20]	< 0.001
Equipment damage, n (%)	6 (20.0)	0 (0.0)	0.024

LMA, laryngeal mask airway. Data are expressed as mean ± SD, median [25–75 interquartile], or count (%)

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