Comparison of lighted stylet and intubating laryngeal mask airway in assisted intratracheal intubation

Abstract

Objective To compare the efficacy of lighted stylet and intubating laryngeal mask airway (LMA) in blind tracheal intubation.Methods A total of 80 patients undergoing selective general anesthesia,aged 48～72,with the Anesthesiologist Society of America (ASA) grading of ] ～ Ⅱ and Mallampatis grading of Ⅰ ～ Ⅱ were randomly assigned to lighted stylet group (group G,n=40) and intubating LMA group (group H,n=40).Identical medications of anesthesia induction were applied in both groups.The time of intubation and extubation was recorded,and the changes in mean arterial blood pressure(MAP) and heart rate(HR) 3 minutes prior to induction (T0),and 1 minute (T1),3 minutes (T2) and 5 minutes (T3) after intubation as well as the adverse events after extubation were also recorded.Results The initial success rate of intubation was 80％ and 85％ in group G and group H,with second success rate of 15％,and 12％,respectively(P＞0.05).The time of intubation in group G [ (40.2 ± 14) s] was significantly shorter than (P＜0.05) that in group H [ (72.4 ± 12) s].An increase in mean arterial blood pressure and heart rate was found 1 minute and 3 minutes after intubation in 2 groups [group G:(93±18)/(86±13)mm Hg and (70±15)bpm,group H:(90-±-15)/(88±12)mm Hg and (72±9)bpm,1 mm Hg=0.133 kPa,P＜0.05].No statistical difference (P＞0.05) was revealed in the adverse events after extubation (coughing,laryngodynia,etc.) between groups.Conclusion Both lighted stylet and intubating LMA are effective and safe due to their high success rate,low complications as well as minor impact on hemodynamics in blind tracheal intubation. Key words: Laryngeal masks; Intubation,endotracheal; Hemodynamics; Lighted stylet