In post-test, rectal temperature was at the normal range in 22 (62.9%) and 17 (48.6%) cases in the intervention and control groups, respectively. Chi-square revealed that no significant difference was found between the groups regarding rectal temperature (P=0.23). While WBC count was within the normal range in 17 (48.6%) and 13 (37.1%) patients of the intervention and control groups, respectively, no statistically significant difference was observed between the groups according to the results of Chi-square (P=0.33).Furthermore, 20 (57.1%) and 17 (48.6%) patients had non-purulent endotracheal discharge in intervention and control groups, respectively, which indicated no significant difference in this regard (P=0.47). Pulmonary infiltration was not observed in 25 (71.4%) and 20 (57.1%) participants in intervention and control groups, respectively. According to the results of Chi-square test, no significant difference was found between the two groups in terms of observation of pulmonary infiltration in chest radiography (P=0.21) (Table 2). In total, 10 (28.6%) cases of intervention and 15 (42.9%) samples of control groups were diagnosed with VAP (based on clinical criteria of VAP); however, no significant difference was observed between the groups in this regard (Figure 2).