Efficiency of a mechanical device in controlling tracheal cuff pressure in intubated critically ill patients: a randomized controlled study

Annals of Intensive Care

Table 2 Impact of the mechanical device on tracheal cuff pressure

Variables	Continuous control of P _cuff	Routine care	p values
Variables	n = 18	n = 18	p values
Mean airway pressure, cmH₂O	14 (10–17)	14 (11–16)	0.679
Mean P _cuff, cmH₂O	25 (18, 28)	21 (18, 26)	0.17
Coefficient of variation of P _cuff, %	19 (11, 26)	20 (12, 25)	0.67
P _cuff 20–30 cmH₂O
Yes^a	18 (100)	18 (100)	NA
% of time^b	34 (17, 57)	50 (35, 64)	0.184
P _cuff <20, cmH₂O
Yes^a	17 (94)	18 (100)	>0.999
% of time^b	23 (5, 63)	43 (16, 60)	0.528
P _cuff >30, cmH₂O
Yes^a	18 (100)	16 (89)	0.500
% of time^b	26 (14, 40)	7 (1, 18)	0.002

Data are frequencies (%) or median (interquartile range)
P _cuff cuff pressure, NA not applicable
^aYes indicates the number of patients with at least one P _cuff 20–30, >20, or >30 cmH₂O
^b% of time indicates all the time spent with P _cuff 20–30, >20, or >30 cmH₂O reported to the total recording time during each study period