Local Anaesthetics and Spinal Anaesthesia by Sophia Mwale - University of Zambia School of Medicine - Anesthesiology-unza

Description

This presentation provides a comprehensive overview of local anesthetics and spinal anesthesia, delivered by Sophia Mwale at the University of Zambia School of Medicine. It begins with the classification of local anesthetics into esters and amides, detailing their metabolism and common examples. The mechanism of action, involving sodium channel blockade to prevent action potential propagation, is clearly explained. The lecture covers various administration techniques, including topical application, infiltration, nerve blocks, and intravenous regional anesthesia, before focusing extensively on spinal and epidural methods. It details the anatomy for spinal needle insertion, patient positioning, and key landmarks like Tuffier's line. Indications for spinal anesthesia, such as lower limb orthopedic surgery, hernia repairs, and caesarean sections, are listed alongside absolute and relative contraindications. The presentation thoroughly addresses local anesthetic systemic toxicity, its clinical features, and emergency management, including the use of lipid emulsion. Complications of spinal anesthesia, such as hypotension, total spinal block, and post-dural puncture headache, are discussed with specific treatment protocols. This resource is designed for medical students and clinical officers seeking foundational and practical knowledge in regional anesthesia for exam preparation and clinical practice. Review this material to strengthen your understanding of safe anesthetic techniques.