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Manual de Emergencias enGastroenterología y HepatologíaTabla I. Factores predisponentes de megacolon tóxicoCoinfección por citomegalovirus o Clostridium difficileAnticolinérgicosAntidepresivosOpiáceosHipopotasemia, hipomagnesemiaSuspensión brusca de corticoidesColonoscopiaEnema opacoENFERMEDAD INFLAMATORIA INTESTINAL234Tabla II. Criterios diagnósticos del megacolon tóxico,propuestos por Jalan et al.1. Evidencia radiológica de dilatación del colon2. Como mínimo 3 ó más de los siguientes signos:a. Fiebre superior a 38,6º Cb. Frecuencia cardiaca superior a 120 latidos/minutoc. Leucocitosis con neutrofilia superior a 10,5x10 9 /ld. Anemia3. Además de lo anterior, como mínimo uno de los siguientes síntomas:a. Deshidrataciónb. Alteración del estado de conscienciac. Alteraciones electrolíticasd. HipotensiónBIBLIOGRAFÍA1. Grieco MB, Bordan DL, Geiss AC, Beil AR Jr. Toxic megacolon complicating Crohn's disease.Clin Gastroenterol 1980;9:389-407.2. Sutherland LLR. Clinical course and complications of ulcerative colitis and ulcerativeproctitis. En: Targan SR, Shanatan F, editors. Inflammatory bowel disease: from bench tobed-side. Baltimore: Williams & Wilkins;1993:279-295.3. Jalan KN, Sircus W, Card WI, Falconer CW, Bruce CB, Crean GP, et al. An experiencewith ulcerative colitis: toxic dilatation in 55 cases. Gastroenterology 1969;57:68-82.4. Trudel JL, Deschenes M, Mayrand S, Barkun AN. Toxic megacolon complicating pseudomembranousenterocolitis. Dis Colon rectum 1995;38:1033-1038.5. Beaugerie L, Ngo Y, Goujard F, Gharakhanian S, Carbonnel F, Luboinski J, et al. Etiologyand management of toxic megacolon in patients with human immunodeficiency virusinfection. Gastroenterology 1994;107:858-863.6. Gan SI, Beck PL. A new look at toxic megacolon: an update and review of incidence,etiology, pathogenesis and management. Am J Gastroenterol 2003;98:2363-2371.7. Sriram PV, Reddy KS, Rao GV, Santoshet D, Reddy DN. Infliximab in the treatment ofulcerative colitis with toxic megacolon. Indian J Gastroenterol 2004;23:22-23.8. Sawada K, Egashira A, Ohnishi K, Fukunaga K, Kusaka T, Shimoyama T. Leukocytapheresisfor management of fulminant ulcerative colitis with toxic megacolon. Dig Dis Sci2005;50:767-773.9. Leijonmarck CE, Persson PG, Hellers G. Factors affecting colectomy rate in ulcerativecolitis: An epidemiologic study. Gut 1990;31:329-333.10. Ausch C, Madoff RD, Gnant M, Rosen HR, García-Aguilar J, Holbling N, et al. Aetiologyand surgical management of toxic megacolon. Colorectal Dis 2006;8:195-201.

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