Damage control laparotomy utilization rates are highly variable among Level I trauma centers: PROPPR findings.

Background: Damage control laparotomy (DCL) is intended to limit deleterious effects from trauma induced coagulopathy. DCL has been associated with mortality reduction, but may increase complications including sepsis, abscess, respiratory failure, hernia, and gastrointestinal fistula. We hypothesized that (1) DCL incidence would vary between institutions; (2) mortality rates would vary with DCL rates; (3) standard DCL criteria of pH, INR, temperature and major intra-abdominal vascular injury (MVI) would not adequately capture all patients. Methods: Trauma patients at 12 level 1 North American trauma centers were randomized based on transfusion ratios as described in the PROPPR trial. We analyzed outcomes following emergent laparotomy using a mixed-effects logistic model comparing DCL versus definitive surgical management (DSM) with random effect for study site. Primary outcomes were 24-hour and 30-day mortality. Results: 329 patients underwent emergent laparotomy: 213 DCL (65%) and 116 DSM (35%). DCL rates varied between institutions (33%-83%), (p=0.002). Median ISS was higher in the DCL group, 29 (IQR: 13,34) versus 21 (IQR: 22,41) (p

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