**Author details**

Geisi Saito1 and Rodrigo Zapata<sup>2</sup> \*

1 Department of Anaesthesiology, Asenjo Neurosurgery Institute, Santiago, Chile

2 Neurosurgery Service, Regional Hospital of Rancagua, Hospital Regional Libertador Bernardo O'Higgins, Rancagua, Chile

\*Address all correspondence to: rzapata.barra@gmail.com

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
