Effects of different mechanical ventilation modes on severe chest injury complicated with acute respiratory distress syndrome in elderly patients

Objective To investigate and analyze the effect of different mechanical ventilation modes in the treatment of severe chest injury complicated with acute respiratory distress syndrome in the elderly. Methods From July 2016 to July 2018, 92 elderly patients with severe chest injury complicated with acute respiratory distress syndrome who were treated in Shengzhou Hospital of Traditional Chinese Medicine were selected in the research.The patients were divided into control group and observation group by envelope-type grouping, with 46 cases in each group.The control group received synchronous intermittent command ventilation combined with positive end-expiratory pressure ventilation, and the observation group was given continuous positive airway pressure ventilation combined with pressure support ventilation.The clinical efficacy, respiratory pattern parameters and blood gas indicators of the two groups were compared. Results The total clinical improvement rate of the observation group was 97.83%, which of the control group was 93.48%, the difference was not statistically significant (χ2=0.426, P>0.05). The MV, SaO2 and PaO2 in the observation group were significantly higher than those in the control group, while PIP and PaCO2 in the observation group were significantly lower than those in the control group, the differences were statistically significant (t=13.022, 18.622, 10.605, 27.238, 11.746, all P<0.05). All the blood and gas indicators in the observation group were significantly better than those in the control group (t=6.166, 2.766, 6.905, all P<0.05). Conclusion Synchronous intermittent command ventilation combined with positive end-expiratory pressure ventilation and continuous positive airway pressure combined with pressure support ventilation in the treatment of elderly patients with severe chest injury combined with acute respiratory distress syndrome can achieve an ideal clinical effect. Key words: Ventilators, mechanical; Respiration, artificial; Respiratory distress syndrome, adult; Thoracic, injuries; Blood gas analysis; Aged