Effect of Intravenous Lidocaine on the ED50 of Propofol Induction Dose in Elderly Patients Undergoing Painless Gastroscopy: a Prospective, Randomized, Double-Blinded, Controlled Study

Intravenous lidocaine could be a potential alternative adjuvant to propofol-based sedation for gastroscopy in elderly patients. This study aimed to evaluate the effect of intravenous lidocaine on the median effective dose (ED50) of propofol induction dose in elderly patients undergoing painless gastroscopy. The study included 70 patients aged ≥ 60 years undergoing painless gastroscopy with 64 randomly assigned to either group L (2