The use of a novel cleaning closed suction system reduces the volume of secretions within the endotracheal tube as assessed by micro-computed tomography: a randomized clinical trial

Annals of Intensive Care

Table 2 ETT analysis after extubation

	All patients, n = 40	Control group, n = 20	Treatment group, n = 20	P value
Study ETT in place, days	5 (3–8)	5 (3–7)	5 (3–10)	0.512
ETT secretions, volume (mL)	0.274 (0.046–0.576)	0.568 (0.162–0.756)	0.081 (0.021–0.306)	0.001
Average CSA reduction (%)	3 (1–6)	6 (2–10)	1 (0–3)	0.001
Tracheal aspirate cultures, log (CFU)	0 (0–5)	0 (0–3)	0 (0–5)	0.234
ETT colonization, log (CFU)	2 (0–4)	2 (0–4)	1 (0–4)	0.568
Leukocytes in ETT lavage, n. pos. (%)	6 (15)	6 (30)	0 (0)	0.019

ETT endotracheal tube, CSA cross-sectional area, CFU colony forming units, n. pos. number of ETT lavage samples positive for leukocytes presence