First rib fracture: A harbinger of severe trauma?

Prior to routine CT scanning, first rib fractures (FRFs) were considered a harbinger of great vessel injuries. We hypothesized FRFs identified on screening CXR have significant associated injuries, while those identified on CT alone do not.

We reviewed adult blunt thoracic trauma patients 2014-2015 to identify all FRFs and then tabulated demographics, injury characteristics, and outcomes.

Of 429 patients with chest trauma, 56 had a FRF. CXR diagnosed 20% and CT 80%. Those diagnosed on CXR were older (61 vs 48 p = 0.03), had more severe chest trauma (45% vs 13% chest AIS>3, p = 0.029), longer ICU stays (10 vs 4 days, p = 0.046), and risk for intubation (73% vs 27%, p = 0.011). There was only one major vascular injury in each group. Most FRF patients had associated injuries, including 82% with pelvic fractures.

Widespread use of CT scanning has resulted in a 5-fold increase in FRF diagnoses. While vascular injuries are not common, especially when identified on initial CXR, FRFs correlate with morbidity and associated injuries.