Algorithm for treatment of colorectal hemorrhage Algorithm for treatment of colorectal hemorrhage. NG = nasogastric; 99mTc = technetium-99; RBC = red blood cell. (Reproduced with permission of Taylor & Francis, LLC from Gordon PH, Nivatvongs S, eds. Principles and Practice of Surgery for the Colon, Rectum, and Anus. 2nd ed. New York: Marcel Dekker, Inc.; 1999:1279. Permission conveyed through Copyright Clearance Center, Inc.) Source: Colon, Rectum, and Anus, Schwartz's Principles of Surgery, 10e Citation: Brunicardi F, Andersen DK, Billiar TR, Dunn DL, Hunter JG, Matthews JB, Pollock RE. Schwartz's Principles of Surgery, 10e; 2014 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/980/bru_ch29_f007.png&sec=100400215&BookID=980&ChapterSecID=59610871&imagename= Accessed: October 08, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved