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. 2014 Oct 27;67(4):240–245. doi: 10.4097/kjae.2014.67.4.240

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Copyright © the Korean Society of Anesthesiologists, 2014

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1 — The sequential ultrasound images at four time-points. (A) ONSD measured at 1 minute after ETCO₂ reached 40 mmHg (time-point 1), (B) ONSD measured at 5 minutes after ETCO₂ reached 40 mmHg (time-point 2), (C) ONSD measured at 1 minute after ETCO₂ reached 30 mmHg (time-point 3), (D) ONSD measured at 5 minutes after ETCO₂ reached 30 mmHg (time-point 4). ONSD: optic nerve sheath diameter, ETCO₂ : end-tidal carbon dioxide concentration.