RT Book, Section A1 Nicks, Bret A. A1 Gaillard, John A2 Tintinalli, Judith E. A2 Stapczynski, J. Stephan A2 Ma, O. John A2 Yealy, Donald M. A2 Meckler, Garth D. A2 Cline, David M. SR Print(0) ID 1142381844 T1 Approach to Shock T2 Tintinalli’s Emergency Medicine: A Comprehensive Study Guide, 8e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071794763 LK accessmedicine.mhmedical.com/content.aspx?aid=1142381844 RD 2024/04/19 AB The exact number of cases of shock that present to the ED in the United States is difficult to ascertain due to the insensitivity of clinical parameters, current definitions, and lack of a central database repository. Previous estimates propose that more than 1 million cases of shock are seen in the ED each year in the United States.1 These estimates are largely based on the assumption that hypotension, defined as a systolic blood pressure <90 mm Hg, is consistent with shock in adults. Using this definition, the incidence of patients with hypotension that present to American EDs is approximately 5.6 million cases per year.2