Comparison the effect of supralaryngeal airway and endotracheal catheter on the eye during induction of general anesthesia

Abstract

Objective To compare the effect of supralaryngeal airway (Slipa) and endotracheal catheter on the eye during induction of general anesthesia.Methods Fifty patients aged 20 ～50 years old with weight 45 ～70 kg and intraocular pressure (IOP) 12 ～18 mmⅡg received elective benign breast neoplasm resection surgery and were randomly divided into 2 groups:S group (Slipa) and C group (endotracheal catheter).Anesthesia was induced with intravenous propofol and remifentanil until loss of the eyelash reflex.Cisatracurium was then administered.When the jaw was flabby,Slipa was inserted to trachea and the intubation was performed with mechanical ventilation.The IOP,mean arterial pressure (MAP),and heart rate (HR) were measured and recorded before anesthesia induction(T0),before intubation(T1),after intubation immediately(T2),at 1 min(T3),2 min(T4),5 min(T5) after intubation.Results Compared with TO,the IOP,MAP and HR were significantly lower than those at T1.Compared with T1 in group S,the IOP,MAP and HR in T2 ～ T5 were more stable.In group C,the IOP,MAP and HR significantly increased at T2,T3,T4.Compared with group S,the IOP,MAP and HR in group C were significantly higher at T2,T3,T4.The MAP was positively correlated with the IOP in group S and group C (r =0.832 and 0.829,respectively).Conclusion Supralaryngeal airway is better than endotracheal catheter in preventing the increase of IOP and keeping stable hemodynamic responses during induction of general anesthesia. Key words: Airway, supralaryngeal ; Intubation, intratracheal ; Pressure, intraocular