1 Additional complications include bradycardia, laryngospasm, bronchospasm, and apnea owing to pharyngeal stimulation.

2 Induction time, recovery time and the incidences of laryngospasm, vomiting, movement, change of circulation and respiration during operation and agitation were recorded.

3 Results All the patients underwent successful gastroscopy except one who stopped being examined due to laryngospasm.

4 We believe that this patient's airway obstruction was likely secondary to laryngospasm rather than laryngeal edema.

5 Water in the lungs blocks gas exchange in delicate tissues, while inhaling water also triggers the airway to seal shut - a reflex called a laryngospasm .

6 MAP and HR of three groups in different period were observed. The recovery time, the incidence of laryngospasm, cough, nausea and vomiting of patients were recorded and observed.