EFFECTIVE VOLUME OF LOCALANAESTHETICS IN ULTRASOUND GUIDED SUPRACLAVICULAR BRACHIAL PLEXUS BLOCK.

Abstract

Background: In modern practice of Anaesthesia, Regional Anesthesia by peripheral nerve block is one of the most common methods to achieve Anaesthesia alone or in conjunction with general anaesthesia. It is a successful method, as famously quoted by Denny M and Harrop-Grifths in their study, “Regional anaesthesia always works —provided you put the right dose of the right drug in the right place”. We aim to determine effective volume of local anaesthetic using 0.5% Bupivacaine and 2% Lignocaine with Adrenaline 1: 200000 in equal proportion by ultrasound guided Supraclavicular Brachial Plexus Block (SBPB). Methods: This study was conducted in Department of Anaesthesiology, Tomo Riba Institute of Health and Medical Sciences (TRIHMS), Naharlagun, Arunachal Pradesh. 52 patients of age 18 – 60years of age, both male and female who had undergone Orthopaedic surgeries of arm and forearm were included in this study. We aim to nd out the Effective volume of Local Anaesthetics used to achieve Ultrasound guided Supraclavicular Brachial Plexus Block by injecting 0.5% Bupivacaine with 2% Lignocaine with Adrenaline 1:200000 using in plane (lateral to medial) approach. Result: We found success rate of 92.3% in our study. The mean effective volume of local anaesthetic was 15ml (SD = ±4.711). From our study, we conclude that peripheral nerve block by Ultrasound guided SBPB can be achieved with low volume of local anaesthetics and thereby increasing the safety of the procedure. Statistical analysis was done using SPSS 27.