Abstract:Objective To explore the efficacy of intravenous lidocaine in propofol-based sedation for ultrasonic gastroscopy.Methods 62 patients scheduled for ultrasonic gastroscopy from March 2020 to July 2020 were divided into 2 groups by using a random number table method, the propofol+lidocaine group (group L) and the propofol + normal saline group (group P), with 31 patients in each group. Patients in group L received a bolus of 1.0 mg/kg lidocaine intravenously before sedation, followed by continuous infusion of 1.0 mg/(kg·h). Whereas the group P received the equal volumes of normal saline in the same way. Patients in 2 groups received propofol 1.5 mg/kg and sufentanil 0.1 μg/kg. Patients with modified observer's assessment of alertness/sedation scale (MOAA/S) > 3 or failed to try endoscopy, propofol 0.5 mg/kg was added per time. The heart rate (HR), mean arterial pressure (MAP) and percutaneous arterial oxygen saturation (SpO2), propofol induction dose, additional dose, total dose, complete recovery time, the incidence of complications and endoscopist satisfaction were recorded before induction (T1), after induction (T2), gastroscopy insertion (T3) and withdrawal (T4).Results Compared with T1, HR, MAP in T2, T3 and T4 both decreased in 2 groups (P < 0.05) . Compared with group P, there were no significant difference in HR, MAP and SpO2 at each time point in group L (P > 0.05). The induction dose [(100.08±14.69) and (118.07±27.35) mg], additional dose [(73.54 ± 36.34) and (127.52 ± 92.24) mg], total dose of propofol [(166.04 ± 27.17) and (244.30 ± 95.05) mg] and average propofol consumption [(5.86 ± 2.67) and (7.44 ± 1.80) mg/(kg·h)] in group L were significantly lower than those in group P (P < 0.05). The complete recovery time in group L was significantly shorter than that in group P [(3.24 ± 1.04) and (4.76 ± 0.99) min] (P < 0.05). In group L, the incidence of hypotension, hypoxemia, propofol injection pain, choking cough were significantly lower than those in group P, and the endoscopist satisfaction was higher (P < 0.05). There were no significant difference in the incidence of bradycardia, sore throat and abdominal pain in two groups (P > 0.05). No nausea and vomiting occurred in 2 groups.Conclusion Intravenous lidocaine can decrease propofol requirements and adverse effect during ultrasonic gastroscopy with faster recovery and higher endoscopist satisfaction.