Journal of Neuroanaesthesiology and Critical Care [Thieme Medical and Scientific Publishers Private Limited 19th Annual Conference of the Indian Society of Neuroanaesthesiology and Critical Care (ISNACC) - Mumbai, India (2018.01.19-2018.01.21)] 19th Annual Conference of the Indian Society of Neuroanaesthesiology and Critical Care (ISNACC) - Venous Air Embolism in Brain Tumor Surgery Presentation under Anesthesia and Its Association with Postoperative Venous Infarction of the Brain