Emergence delirium is a common complication after sevoflurane anesthesia in preschool children.

Intravenous infusion of 0.2 μg/kg/min and 0.4 μg/kg/min alfentanil reduced emergence delirium following ambulatory dental procedures. The lower dose of alfentanil resulted in less discharge delay than the higher dose.

The smartphone WeChat applet can be used for follow-up, and it also reduces physical contact during the coronavirus disease 2019 (COVID-19) pandemic.

Sevoflurane-alfentanil anesthesia in pediatric dental procedures does not increase the incidence of adverse events.