Algorithm for the management of subarachnoid hemorrhage–associated hydrocephalus. External ventricular drain (EVD) challenge is generally initiated within 1 week of EVD placement. Ventriculoperitoneal (VP) shunting is appropriate for patients with persistent hydrocephalus. ICP, intracranial pressure; SAH, subarachnoid hemorrhage. Source: External Ventricular Drain Management and Ventriculoperitoneal Shunt, The NeuroICU Book Citation: Lee K. The NeuroICU Book; 2012 Available at: https://neurology.mhmedical.com/DownloadImage.aspx?image=/data/books/1044/lee_ch22_f03.png&sec=59099917&BookID=1044&ChapterSecID=59098210&imagename= Accessed: November 06, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved