Dr. Deepa G.S., Dr. Naveen Kumar C.P. and Dr. Smitha Y. (2026) “Pulse Oximeter Perfusion Index as an Early Predictor of Successful Ultrasound-Guided Axillary Brachial Plexus Block: A Prospective Observational Study”, International Journal of Pharmacy Research & Technology (IJPRT), 16(1), pp. 1767–1772. Available at: https://www.ijprt.org/index.php/pub/article/view/1773 (Accessed: 20 April 2026).