COMPARISON OF THE PLETH VARIABILITY INDEX, PERFUSION INDEX, AND PULSE PRESSURE VARIABILITY FOR FORECASTING HYPOTENSION DURING LARGE ABDOMINAL OPERATIONS UNDER GENERAL ANAESTHESIA. International Research Journal of Pharmacy, [S. l.], v. 12, n. 2, p. 27–31, 2021. Disponível em: https://irjponline.org/index.php/irjp/article/view/3053. Acesso em: 25 may. 2026.