Influence of laryngeal mask and tracheal intubation between BIS40-60 on hemodynamics of patients undergoing general anesthesia

Objective: To compare the influence of laryngeal mask and tracheal intubation on hemodynamics of patients undergoing general anesthesia.Methods: A total of 89 cases categorized as ASAⅠ-Ⅱ that were scheduled for surgery under general anesthesia were divided into group A(laryngeal mask group,43 cases) and group B(tracheal intubation group,46 cases).Both groups were given routine intravenous anesthesia,and BIS were maintained between 40-60.blood pressure,heart rate,oxygen saturation and bispectral index(BIS) of each patient in two groups were recorded at following time points: before anesthesia(T0),after induction(T1),3 min after laryngeal mask or endotracheal tube insertion(T2),30 min after the start of the surgery(T3),after surgery was finished(T4),before removing laryngeal mask or endotracheal tube(T5) and 3min after removing artificial airway(T6).Recovery time and recovery quality,as well as incidence of airway complications of each patient in two groups were also recorded.Results:At T1 blood pressure,heart rate,BIS in two groups were fewer than that at T0 showing statistical significance;at T2,blood pressure and heart rate in group B were restored to the level before the anesthesia,and there was a statistical significance comparing with that in group A;blood pressure and heart rate in group A were higher than that of group B at T3 and T4;BIS in group A was higher than that in group B at T5 and T6,but blood pressure and heart rate were higher in group B than that of group A.Recovery time of group B was longer than that of group A,but recovery quality was poorer in group B than that in group A,the degree of satisfaction of group A was higher than that in group B,airway complications in group A was less than that in group B,there was a statistical significance.Conclusions: The influence of laryngeal mask on hemodynamics is less than that of tracheal intubation in general anesthesia,also laryngeal mask airway has higher recovery quality and less airway complications than tracheal intubation.