Singh, Manu, Dheer Singh, Atit, Deepa Ekka, and P. S. Indhumathi. “To Evaluate the Quality of Successful Ultrasound Guided Supraclavicular Brachial Plexus Block and Its Correlation With Perfusion Index Ratio”. International journal of health sciences 5, no. S2 (December 27, 2021): 1093–1100. Accessed April 28, 2026. https://sciencescholar.us/journal/index.php/ijhs/article/view/14151.