Abstract
This study determines whether mortality after major trauma is predicted by the strong ion gap (SIG) and whether recent refinements in the calculation of SIG improve its predictive value. The design was an observational, retrospective review of trauma patients admitted on a single service at a level 1 facility. The setting was an urban level 1 trauma facility. An unselected cohort of patients sustaining blunt and/or penetrating injury requiring intensive care unit care was chosen. There were no interventions. Age, injury mechanism, survival, arterial blood gases, hemoglobin, albumin, electrolytes, lactate, standard base deficit, strong ion difference (SID), buffer base, and SIG were analyzed. Patients were grouped into survivors and nonsurvivors according to in-hospital survival truncated to 28 days. Multivariate logistic regression was used for further analysis of univariate predictors of mortality, and receiver-operator characteristic curves were generated for mortality. Both nonsurvivors (n = 26) and survivors (n = 52) were similar with respect to age (31.9 +/- 11.5 vs. 33.5 +/- 11.6 years) and injury mechanism (blunt 61% vs. 58%) Nonsurvivors were more likely to have multicavity injury (54% vs. 26%; P < 0.01) than survivors....Continue Reading
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