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. 2015 Mar 31;15:43. doi: 10.1186/s12871-015-0025-9

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© Chin et al.; licensee BioMed Central. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Change in optic nerve sheath diameter (ONSD) between the supine and the steep Trendelenburg position. A significant increase was found in the ONSD 3 min after the patient position was changed from supine to steep Trendelenburg. T_SUP: in the supine position after induction of anesthesia; T_TREN: 3 min after the steep Trendelenburg position (35° incline).