Background: Postoperative pulmonary complications (PPCs) are common and significant problems for oral and maxillofacial surgery patients. Dexmedetomidine (DEX), an α2-adrenoreceptor agonist, has been proven having lung protection effects. However, since now, there has not been final conclusion about whether DEX can reduce the incidence of PPCs. We hypothesize that, in oral and maxillofacial surgery with fibular free flap reconstruction patients, DEX may decrease the incidence of PPCs.Methods: This was a prospective, double-blind, randomized, placebo-controlled, single-centered trial with two parallel arms. A total of 160 patients at intermediate-to-high risk of PPCs undergoing oral and maxillofacial surgery with fibular free flap reconstruction and tracheotomy were enrolled and randomized to receive continuous infusion of either DEX or placebo (normal saline). 0.4ug/kg dose of DEX was given over 10mins as an initial dose followed by a maintaining dose of 0.4ug/kg/h till the second day morning after surgery. At the same time, the normal saline was administered a similar quantity. The primary outcome was the incidence of PPCs according to Clavien-Dindo score within 7 days after surgery.Results: The two groups had similar characteristics at baseline. 18(22.5%) of 80 patients administered DEX, and 32(40.0%) of 80 patient administered placebo experienced PPCs within the first 7 days after surgery (relative ratio [RR] 0.563,95% confidence interval [CI] 0.346-0.916; P=0.017). In the first 7 days after surgery, the DEX group had a lower incidence of PPCs and a better postoperative survival probability (Log-rank test, P=0.019), and was less prone to occur PPCs (Cox regression, P=0.025, HR=0.516). When the total dose of DEX was more than 328μg, the patients were unlikely to have PPCs (ROC curve, AUC=0.614, P=0.009).Conclusions: Continuous infusion of DEX marks a huge decrease in the appearance of PPCs within the first 7days after surgery, for patients undergoing oral and maxillofacial surgery with fibular free flap reconstruction and tracheotomy.Trial registration: Chinese Clinical Trial Registry, www.chictr.org.cn, number: ChiCTR1800016153; Registered on May 15, 2018.
Background: The effects of intravenous and inhalation anesthesia on intraoperative and postoperative pulmonary inflammatory responses have been reported in many studies. The differences in clinical postoperative pulmonary complications (PPCs) have been also studied in cardiac and lung resection surgery. However, there are few relevant reports and the findings remain controversial. Clinical evidence for the effects of these two anesthetics on PPCs in other types of surgery is still missing. The main goal of the current study was to assess the impact of sevoflurane and propofol on the incidence of PPCs in patients undergoing oral and maxillofacial surgery. Methods: In this double-blind, randomized, controlled trial, we randomly assigned 220 adults at intermediate-to-high risk of pulmonary complications after oral and maxillofacial cancer surgery with radial forearm or fibular flap reconstruction to either propofol or sevoflurane as a general anesthetic. The occurrence of pulmonary complications according to the Clavien-Dindo score was defined as the primary (within 7 days after surgery) outcome. Results: The two intervention groups had similar characteristics at baseline. The PPCs incidence during 7 days after surgery was 32.4% and 18.2% in the propofol and sevoflurane groups, respectively (adjusted relative risk, 0.44; 95% confidence interval [CI], 0.22 to 0.91; P = 0.027). The corresponding incidence of PPCs in patients who underwent tracheotomy at the end of surgery in the two groups was 44.8% and 24.5% (adjusted relative risk, 0.39; 95% CI, 0.17 to 0.91; P = 0.030). In addition, the Clavien-Dindo classification showed significant differences between groups in minor complications (grade I and II) but not in major complications (grade III to V). Intergroup difference in the time to occurrence of the first PPC after surgery was significant (P = 0.021). There was no difference in postoperative hospital stay between the two groups. Conclusions: Compared with intravenous anesthesia, the administration of sevoflurane reduces the incidence of minor PPCs (grade I to II) in moderate- and high-risk patients who have undergone tracheotomy after oral and maxillofacial cancer surgery with radial forearm or fibular flap reconstruction.
Background: The effects of intravenous and inhalation anesthesia on intraoperative and postoperative pulmonary inflammatory responses have been reported in many studies. However, the differences in clinical postoperative pulmonary complications (PPCs) have rarely been studied, except in cases of lung resection. The main goal of the current study was to assess the impact of sevoflurane and propofol on the incidence of PPCs in patients undergoing oral and maxillofacial surgery. Methods: In this double-blind, randomized, controlled trial, we randomly assigned 220 adults at intermediate-to-high risk of pulmonary complications after oral and maxillofacial surgery to either propofol or sevoflurane as a general anesthetic. The occurrence of pulmonary complications according to the Clavien-Dindo score was defined as the primary (within 7 days after surgery) outcome. Results: The two intervention groups had similar characteristics at baseline. The PPCs incidence during 7 days after surgery was 32.4% and 18.2% in the propofol and sevoflurane groups, respectively (adjusted relative risk, 0.44; 95% confidence interval [CI], 0.22 to 0.91; P = 0.027). The corresponding incidence of PPCs in patients who underwent tracheotomy after surgery was 44.8% and 24.5% (adjusted relative risk, 0.39; 95% CI, 0.17 to 0.91; P = 0.030). Intergroup difference in the time to occurrence of the first PPC after surgery was significant (P = 0.021). There was no difference in postoperative hospital stay between the two groups. Conclusions: Compared with intravenous anesthesia, the administration of sevoflurane reduces the frequency of PPCs in intermediate-risk and high-risk patients undergoing oral and maxillofacial surgery with microvascular reconstruction. Trial registration: Clinical Trail Registration: ChiCTR1800015347; Registered March 25, 2018.
Background: Postoperative pulmonary complications (PPCs) are common and significant problems for oral and maxillofacial surgery patients. Dexmedetomidine (DEX), an α2-adrenoreceptor agonist, has been proven having lung protection effects. However, since now, there has not been final conclusion about whether DEX can reduce the incidence of PPCs. We hypothesize that, in oral and maxillofacial surgery with fibular free flap reconstruction patients, DEX may decrease the incidence of PPCs.Methods: This was a prospective, double-blind, randomized, placebo-controlled, single-centered trial with two parallel arms. A total of 160 patients at intermediate-to-high risk of PPCs undergoing oral and maxillofacial surgery with fibular free flap reconstruction and tracheotomy were enrolled and randomized to receive continuous infusion of either DEX or placebo (normal saline). 0.4 ug/kg of DEX was given over 10mins as an initial dose followed by a maintaining dose of 0.4 ug/kg/h till the second day morning after surgery. At the same time, the normal saline was administered a similar quantity. The primary outcome was the incidence of PPCs according to Clavien-Dindo score within 7 days after surgery. Results: The two groups had similar characteristics at baseline. 18(22.5%) of 80 patients administered DEX, and 32(40.0%) of 80 patient administered placebo experienced PPCs within the first 7 days after surgery (relative risk [RR] 0.563,95% confidence interval [CI] 0.346-0.916; P=0.017). In the first 7 days after surgery, the DEX group had a lower incidence of PPCs and a better postoperative survival probability (Log-rank test, P=0.019), and was less prone to occur PPCs (Cox regression, P=0.025, HR=0.516). When the total dose of DEX was more than 328μg, the patients were unlikely to have PPCs (ROC curve, AUC=0.614, P=0.009).Conclusions: For patients undergoing oral and maxillofacial surgery with fibular free flap reconstruction and tracheotomy who were at intermediate or high risk of developing PPCs, continuous infusion of DEX could decrease the occurrence of PPCs during the first 7 days after surgery and shorten the length of hospital stay after surgery, but did not increase the prevalence of bradycardia or hypotension. Trial registration: Chinese Clinical Trial Registry, www.chictr.org.cn, number: ChiCTR1800016153; Registered on May 15, 2018.
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