Abstract:Objective To study the clinical efficacy of Sufentanil combined with Dexmedetomidine in the treatment of type II respiratory failure in the patients with mechanical ventilation. Methods Ninety patients with type II respiratory failure in Sichuan Mianyang 404 Hospital from July 2015 to June 2017 were randomly divided into a control group (Sufentanil combined with Midazolam routine analgesia regimen) and an observation group (Sufentanil combined with Dexmedetomidine sedation regimen), with 45 cases in each group. The analgesic goal was CPOT (Critical-care Pain Observation Tool) ≤ 2, and the sedation target was RASS (Richmond Agitation-Sedation Scale) ranging from -2 to 1. The two groups were compared in terms of time, blood pressure, respiratory depression, occurrence of delirium, wake-up time, ICU hospitalization time, and inflammatory factors. Results There was no significant difference in the time required to reach the goal of sedation between the two groups (P > 0.05), while the time required to reach the target of analgesia had a significant difference between the two groups (P < 0.05). There was a significant difference in the wake-up time between the observation group and the control group (P < 0.05), the patients in the observation group were more likely to wake up. The mechanical ventilation time in the observation group was shorter than that in the control group (P < 0.05), the incidences of delirium and respiratory depression in the observation group were lower than those in the control group, the differences were significant (P < 0.05). The incidence of blood pressure lowering in the observation group was lower than that in the control group (P < 0.05). There was no significant difference in plasma TNF-α level between the two groups at the 24th h of sedation (P > 0.05). The level of plasma IL-1 in the observation group was lower than that of the control group at the 24th h of sedation (P < 0.05). Conclusions Early goal-directed sedation is feasible in the patients with type II respiratory failure, and the sedative effect is satisfactory. It can shorten the time of ICU hospitalization and mechanical ventilation, and only has a little effect on respiration and circulation, and low occurrence of delirium.