Fig. 3From: Efficacy and safety of subanesthetic doses of esketamine combined with propofol in painless gastrointestinal endoscopy: a prospective, double-blind, randomized controlled trialPropofol consumption per minute. Patients were treated with propofol alone or propofol with different doses of esketamine. Propofol consumption per minute was recorded at the end of the gastrointestinal endoscopy. N = 65, *P < 0.05Back to article page