Impact of a Low-Pressure Polyurethane Adult Endotracheal Tube on the Incidence of Ventilator-Associated Pneumonia: A before and after Concurrence Study

Table 3

Ventilator-associated pneumonia per intensive care unit before and after PUC-ETT.

ICU (beds)	July 2006–June 2007 PVC-ETT			July 2007–June 2008 PUC-ETT
	No. of VAPs	No. of vent days	VAP rate (per 1000 ventilator days)*	No. of VAPs	No. of vent days	VAP rate (per 1000 ventilator days)*
Surgical (18)	11	3166	3.47	5	3328	1.5
Neurosurgical (25)	24	2742	8.75	13	3878	3.35
Burn (6)	13	1178	11.04	4	908	4.41
Cardiothoracic (20)	9	2835	3.17	8	2960	2.7
Coronary care (18)	7	1762	3.97	1	1480	0.68
Medical (10)	4	1556	2.57	1	1565	0.64
Total	68	13239	5.14	32	14119	2.27

∗: (numberofVAPs/numberofventilatordays)×1000.
VAP: ventilator-associated pneumonia.
PVC-ETT: polyvinyl-cuffed endotracheal tube.
PUC-ETT: polyurethane-cuffed endotracheal tube.