A novel technique for safe blind percutaneous tracheotomy: retrospective case-series study on three hundred eighty-six patients

Ain-Shams Journal of Anesthesiology

Table 2 Novel technique time, total time, correlation with age, neck circumference and grades of bleeding and recorded complications of the procedure in studied patients

	NT time (sec)	TT time (sec)
Range	27–84	75–205
Mean ± S.D.	46.48±8.33	125.73±19.52
Correlation of NT, TT with age, neck CMF
Age	−0.139^** Pc=0.006	−0.092 Pc=0.072
Neck CMF	0.659^** Pc=0.000	0.671^** Pc=0.000
Bleeding
No (17) (4.40%)	46.06±1.25	124.41±11.40
Mild (331) (84.75%)	46.02±8.22	124.16±18.68
Moderate (38) (9.84%)	50.68±9.42	140.03±23.73
	p₁ = 1.000 p₂ = 0.156 p₃ = 0.003*	p₁ = 1.000 p₂ = 0.015* p₃ < 0.001*
Complications
Bleeding	Mild 331	Moderate 38
Desaturation	33 (8.55%)
Pneumothorax	3 (0.78%)
S.C emphysema	6 (1.55%)

Values are presented as number (n), percentage (%), range, and mean ± standard deviation (SD). Neck CMF (cm), neck circumference in centimeters; NT time, novel technique time in seconds; TT time, total technique time in seconds; S.C emphysema, subcutaneous emphysema; Pc are p values for Pearson correlation significance (two-tailed)
P values are for ANOVA test at degree of freedom (df) = 2. Sign. bet. groups: significance between groups done using Hochberg method. p1: comparing between no and mild bleeding. p2: No and moderate bleeding. p3: mild and moderate bleeding. Test of sign.: test of significance. *Significant at p ≤ 0.05. ** Positive correlation