Use of Pulse Oximeter Perfusion Index During Ultrasound Guided Supraclavicular Brachial Plexus Block with or Without epinephrine in Upper Extremity Surgery. A Randomized Comparative Study

Abstract

Background: Ultrasound (US) guided supraclavicular block (SCB) has the benefit of the widest sensory blocking of all of the brachial plexus techniques, including the single puncture method, due to the concentration of the plexus components at this site. Objectives: to assess the use of pulse oximeter perfusion index (PI) changes in assessment of success SCB in upper extremity surgery and to evaluate impact of adrenaline on pulse oximeter perfusion index changes. Patients and methods: A prospective, randomized, double-blind, comparative research was done on 90 cases between June 2022 to January 2023, at Al- Faculty of Medicine , Al-Al-Azhar University.