jkma Journal of the Korean Medical Association J Korean Med Assoc 1975-8456 2093-5951 Korean Medical Association 10.5124/jkma.2020.63.3.151 jkma-63-151 Focused Issue of this Month Preparative fasting before contrast-enhanced computed tomography YongHwan Seok MD Department of Radiology, Korea University Guro Hospital, Seoul, Korea Corresponding author: Hwan Seok Yong E-mail: yongtoki@korea.ac.kr 32020 1732020 633 151154 4012020 22022020 Copyright © 2020 Korean Medical Association 2020 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. Abstract

Many hospitals have patients perform preparative fasting prior to contrast-enhanced computed tomography to prevent nausea, vomiting, and accompanying aspiration pneumonia. This policy has been regarded as reasonable because there are many side effects such as vomiting when ionic high-osmolar contrast media are used. Recent advancements in contrast media development, side effects such as nausea and vomiting have markedly decreased. However, fasting prior to the contrast-enhanced computed tomography examination is still customary. While debatable, it is not clear that fasting prior to the use of contrast media has a beneficial effect on the prevention of vomiting. On the contrary, excessive fasting can cause patient dissatisfaction, dehydration, and exhaustion. Therefore, before using contrast media, the duration of fasting should be determined based on consideration of the risks, benefits, and patient's comfort. In particular, to prevent dehydration, limitation of liquid intake during fasting is not recommended.

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