The effect of subglottic secretion drainage on the incidence of ventilator associated pneumonia.

BACKGROUND

Ventilator-Associated Pneumonia (VAP) is an undesired side effect of mechanical ventilation in intensive care units (ICUs).

AIM

We evaluated whether endotracheal tubes with subglottic secretion drainage (SSD) would reduce the incidence of VAP among patients undergoing mechanical ventilation in an ICU.

METHODS

The analysis of medical records of patients undergoing mechanical ventilation exceeding 48 h who were hospitalised in ICUs between 2007 and 2014 led to separating two groups of patients: those in whom no subglottic drainage was applied (NSSD) (records dating from 2007-2010) and those whose treatment involved endotracheal tubes with subglottic secretion drainage (SSD) (records dating from 2011-2014).

RESULTS

Analysis of 1807 patients hospitalised in ICUs (804 NSSD patients and 1003 SSD patients). A difference was found in the frequency of VAP incidence between the groups (P<0.001). In the NSSD group as many as 84 cases were reported (incidence: 10.7%), and in the SSD group - 43 cases (incidence: 5.2%). The odds ratio (OR) and relative risk (RR) was 2.5. The probability of VAP was significantly higher in the NSSD group. The risk factors of VAP incidence (P<0.001) included the correlation between reintubation (R=0.271), tracheostomy (R=0.309) and bronchoscopy (R=0.316).

CONCLUSION

Use of endotracheal tubes with subglottic secretion drainage in patients in the ICU on mechanical ventilation significantly reduced the incidence of VAP.