The Yankauer-Gwathmey drop and vapor mask—similar to a kitchen strainer. (Reproduced from Flagg.34) Source: Anesthesia: Ketamine, Ether, and Halothane, Improvised Medicine: Providing Care in Extreme Environments, 2e Citation: Iserson KV. Improvised Medicine: Providing Care in Extreme Environments, 2e; 2016 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1728/ise_ch17_f003.png&sec=115695948&BookID=1728&ChapterSecID=115695831&imagename= Accessed: November 13, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved