4Find JB, Krause SA, Barrett L. Extending ventilator circuit change interral beyond 2 days reduces the like- lihood of ventilatorassociated pneumonia. Chest, 2000, 113 (4): 405-411.
5Martins DE, Araujo MT, Vieira SB, et al. Heated humidification or face mask to prevent upper airway dryness during continuous positive airway pressure therapy. Chest, 2000, 117:142.