Bincy V Thomas1,2, Isaac Babu1,3, Sachin George1, Anu Janardhanan1. 1. Department of Anaesthesiology and Perioperative Medicine, Rajagiri Hospital, Aluva, Kerala, India. 2. Department of Anaesthesiology, Government Medical College, Kottayam, Kerala, India. 3. Anaesthesiology Institute, Cleveland Clinic, Abu Dhabi, United Arab Emirates.