表 1.

临床结局及不良事件定义

Definitions of clinical outcomes and adverse events

Items	Definitions
Airway management change	Including airway tool change and/or ventilation mode change
Extubation time	Time between end of surgery to extubation
Difficult extubation	Extubation time >30 min
Desaturation	With SpO2 < 95%
Apnea	A pause in breathing >15 s and manual ventilation is required
Bradycardia	Heart rate < 100/min or 20% fall in heart rate
Length of stay	Time between end of surgery to discharge from hospital