• Joanna C Dionne and Lawrence Mbuagbaw.
• Department of Medicine, Division of Critical Care Medicine, Division of Gastroenterology, McMaster University, Hamilton, Ontario, Canada.
• Curr Opin Crit Care. 2023 Apr 1; 29 (2): 138144138-144.

Purpose Of ReviewIn this paper, we review the current evidence with respect to definitions, risk factors, and outcomes of diarrhea in the critically ill and highlight research gaps in the literature.Recent FindingsDefinitions of diarrhea in the intensive care unit (ICU) include the World Health Organization quantified as >3 liquid bowel movements per day and the Bristol Stool Chart score of 7. Diarrhea incidence is 37.7-73.8% and varies based on definition applied. Clostridioides difficile associated diarrhea (CDAD) is uncommon with an incidence of 2.2%. Risk factors for diarrhea include total number of antibiotics, enteral nutrition, and suppository use. The composition of enteral nutrition including high osmolarity and high fiber feeds contributed to diarrhea occurrence. Opiates decrease diarrhea incidence whereas probiotics have no effect on the incidence or duration of diarrhea. Outcomes of diarrhea include increased length of stay in the ICU and hospital, however its impact on mortality is unclear.SummaryDiarrhea remains a common problem in clinical practice and attention must be paid to modifiable risk factors. Further research is needed on interventions to decrease its burden.Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.

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