alexa Early changes in organ function predict eventual survival in severe sepsis.
Medicine

Medicine

Emergency Medicine: Open Access

Author(s): Levy MM, Macias WL, Vincent JL, Russell JA, Silva E,

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Abstract OBJECTIVE: Early identification and treatment of severe sepsis can significantly reduce mortality rate. We hypothesized that a risk prediction model based on early (baseline to day 1 of study) response to standard care should be significantly related to 28-day survival. DESIGN: Analysis of organ dysfunction data from two placebo-controlled severe sepsis trials (PROWESS and secretory phospholipase A2 inhibitor trials). SETTING: Research laboratory. PATIENTS: The placebo arms of two randomized, double-blind sepsis trials were combined (n = 1036). These patients met criteria for severe sepsis and received supportive standard intensive care and fluid resuscitation. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Sequential Organ Failure Assessment (SOFA) scores were calculated daily using the most aberrant physiologic or laboratory variables. Baseline and post-baseline SOFA scores categorized as improved, unchanged, or worsened were used in regression analyses correlating organ dysfunction changes with 28-day mortality. Improvement in cardiovascular (p = .0010), renal (p < .0001), or respiratory (p = .0469) function from baseline to day 1 was significantly related to survival. Odds ratios (95\% confidence intervals) associated with improved vs. worsened respiratory, cardiovascular, or renal function before start of day 1 were 0.56 (0.35-0.91), 0.33 (0.18-0.59), and 0.30 (0.17-0.52), respectively. Continued improvement in cardiovascular function before start of day 2 and start of day 3 was associated with further improvement in survival (p <. 0001), with odds ratios of 0.15 (0.06-0.39) and 0.11 (0.04-0.31) for patients who improved compared with those who worsened. No other organ system was retained in the model, and improvement beyond day 1 in any other organ function did not add to the model's predictive power. CONCLUSIONS: These analyses suggest that outcomes for patients with severe sepsis are closely related to early (baseline to day 1 here) improvement, or lack thereof, in organ function. Also, clinical improvement on subsequent days may have little additional impact on the likelihood of survival.
This article was published in Crit Care Med and referenced in Emergency Medicine: Open Access

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