6Dewitt J1, McGreevy K, Sherman S, et al. Nurse - administered propofol sedation compared with midazolam and meperidine for EUS: a prospective, randomized trial[J]. Gastrointest Endosc. 2005; 68(3):499-509.
7Rizzo J1, Bernstein D, Gress F.A randomized double- blind placebo-controlled trial evaluating the cost-effectiveness of droperidol as a sedative premedication for EUS[J]. Gastrointest Endosc. 1999;50(2):178-82.