Perfusion Index as a Parameter for Effectiveness ofUltrasound-guided Supraclavicular Brachial Plexus Block. j Bangladesh Soc Anaesthesiologists [Internet]. 2026 Jul. 16 [cited 2026 Jul. 16];36(2):5-13. Available from: https://banglajol.info/index.php/JBSA/article/view/91697