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We defined a difficult airway as the presence of any of the following parameters from previous studies: obesity [11], BMI ≥30 kg/m2; mouth opening [4], three fingerbreadths or less; modified Mallampati classification [4], class III or higher; or neck extension [12], < 35°.
Copyright and License information: ©2018 The Korean Society of Emergency Medicine
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/).
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