Journal of Neuroanaesthesiology and Critical Care [Thieme Medical and Scientific Publishers Private Ltd. Abstracts of 21st Annual Conference of the Indian Society of Neuroanaesthesiology and Critical Care (ISNACC 2020) - Mahabalipuram, Chennai, India (2020.01.31-2020.02.02)] Abstracts of 21st Annual Conference of the Indian Society of Neuroanaesthesiology and Critical Care (ISNACC 2020) - Preanesthetic Ultrasonographic Gastric Volume Assessment in Patients Undergoing Elective Intracranial Surgery