Background Most triage guidelines for blunt chest wall trauma focus on advanced age and multiple fractured ribs to indicate a high-risk patient population that should be admitted to an intensive care unit (ICU). Overly sensitive ICU admission criteria, however, may result in overutilization of resources. We revised our rib fracture triage guideline to de-emphasize age and number of rib fractures, hypothesizing that we could lower ICU admission rates without compromising outcomes. Methods Patients admitted to our level 1 trauma center over 9 months after the institution of the revised guideline (N = 248) were compared with those admitted over 6 months following the original guideline (N = 207) using Fisher’s exact and Wilcoxon-Mann-Whitney tests, as appropriate. Univariate followed by multivariate analyses were performed to determine risk factors for complications. Results The ICU admission rate significantly decreased from 73% to 63% ( P = .02) after the institution of the revised guideline, despite an increase in the patient’s age and injury acuity of the cohort. There was no significant difference in respiratory complications, unplanned ICU admission rates, and overall mortality. Poor incentive spirometer effort (750 mL or less) and dyspnea in the trauma bay were the strongest predictors of an adverse composite outcome and prolonged hospital length of stay. Discussion A revised rib fracture triage guideline with less emphasis on the patient’s age and the number of fractured ribs safely lowered ICU admission rates. Poor functional status rather than age and anatomy was the strongest predictor of complications and prolonged hospital stay.

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