What factors affect the prognosis of systemic inflammatory response syndrome (SIRS)?

Updated: May 07, 2018
  • Author: Lewis J Kaplan, MD, FACS, FCCM, FCCP; Chief Editor: Michael R Pinsky, MD, CM, Dr(HC), FCCP, FAPS, MCCM  more...
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Prognosis depends on the etiologic source of SIRS, as well as on associated comorbidities. The mortality rates in the previously mentioned Rangel-Fausto et al study were 7% (SIRS), 16% (sepsis), 20% (severe sepsis), and 46% (septic shock). [7] The median time interval from SIRS to sepsis was inversely related to the number of SIRS criteria met. Morbidity is related to the causes of SIRS, complications of organ failure, and the potential for prolonged hospitalization.

However, the large retrospective study of all of Australia and New Zealand ICU care from 2000-2012 demonstrated a clear progressive decline in severe sepsis and septic shock mortality from 35% to 18% over this period, with equal trends across all age groups and treatment settings. [12] These data suggest that attention to detail, using best practices and overall quality care, has nearly halved mortality from severe sepsis independent of any specific treatment. Thus, attention to overall patient status and use of proven risk reduction approaches (eg, stress ulcer prophylaxis, DVT prophylaxis, daily awakening, and weaning trials in ventilator-dependent patients) are central to improving outcome from severe sepsis.

Pittet et al showed that control patients had the shortest hospital stay, while patients with SIRS, sepsis, and severe sepsis, respectively, required progressively longer hospital stays. [8]

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