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  • Title: Tracheal Tube Design and Ventilator-Associated Pneumonia.
    Author: Rouzé A, Jaillette E, Poissy J, Préau S, Nseir S.
    Journal: Respir Care; 2017 Oct; 62(10):1316-1323. PubMed ID: 28720674.
    Abstract:
    Microaspiration of contaminated oropharyngeal and gastric secretions is the main mechanism for ventilator-associated pneumonia (VAP) in critically ill patients. Improving the performance of tracheal tubes in reducing microaspiration is one potential means to prevent VAP. The aim of this narrative review is to discuss recent findings on the impact of tracheal tube design on VAP prevention. Several randomized controlled studies have reported that subglottic secretion drainage (SSD) is efficient in VAP prevention. Meta-analyses have reported conflicting results regarding the impact of SSD on duration of mechanical ventilation, and one animal study raised concern about SSD-related tracheal lesions. However, this measure appears to be cost-effective. Therefore, SSD should probably be used in all patients with expected duration of mechanical ventilation > 48 h. Three randomized controlled trials have shown that tapered-cuff tracheal tubes are not useful to prevent VAP and should probably not be used in critically ill patients. Further studies are required to confirm the promising effects of continuous control of cuff pressure, polyurethane-cuffed, silver-coated, and low-volume low-pressure tracheal tubes. There is moderate evidence for the use of SSD and strong evidence against the use of tapered-cuff tracheal tubes in critically ill patients for VAP prevention. However, more data on the safety and cost-effectiveness of these measures are needed. Other tracheal tube-related preventive measures require further investigation.
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