"How I Do It: Epidural Electrical Stimulation (Tsui Test) for Thoracic Epidural Catheter Confirmation," by Kwesi Kwofie, MD, FRCPC, Associate Professor, Department of Anesthesia, Perioperative Medicine and Pain Management, Dalhousie University, Halifax, Nova Scotia, Canada; and Ban Tsui, MD, MSc, FRCPC, Professor, Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, California. From ASRA News, May 2021. See original article at www.asra.com/asra-news for figures and references. This material is copyrighted.