Pirotesak, Samita, Somchai Amornyotin, Sithee Chumthong, and Wilaiporn Supan. “A comparison Between Propofol with and without Ephedrine on Hemodynamic Parameters in Propofol-Based Deep Sedation for Colonoscopy”. Thai Journal of Anesthesiology 51, no. 1 (January 7, 2025): 15–22. accessed September 20, 2026. https://he02.tci-thaijo.org/index.php/anesthai/article/view/273054.