Varun Suresh1, Saurabh Sharma2. 1. Department of Anaesthesiology, Government Medical College, Thiruvananthapuram, Kerala, 695011, India. varunsureshpgi@gmail.com. 2. Department of Neuro-Anesthesia and Neuro-Critical Care, Kalinga Institute of Medical Sciences, Bhubaneswar, Odisha, 751024, India.