A 2×2 Factorial Randomized Controlled Trial for ERCP
To investigate the effects of propofol vs. cyclopropofol and sufentanil vs. esketamine on intraoperative hypoxemia and hypotension in elderly patients undergoing ERCP, as well as the interaction between these two factors.
Age ≥ 60 years old. [+4]
Previous anatomical changes in the gastrointestinal tract, delayed gastric empty... [+13]