Blunt cerebrovascular injuries: redefining screening criteria in the era of noninvasive diagnosis.

BACKGROUND

Screening for blunt cerebrovascular injuries (BCVIs) and early treatment has virtually eliminated injury-related strokes. Screening protocols developed in the 1990s captured ∼80% of ultimately identified BCVI. With the availability of noninvasive diagnosis with computed tomographic angiography, broader indications for screening seem warranted. The purpose of this study was to identify injury patterns of patients with BCVI that are not currently recommended screening criteria.

METHODS

Our prospective BCVI database, initiated in 1997, was queried through December 2010. Indications for screening, injury mechanism, and outcomes were analyzed. Patients younger than 18 years were excluded.

RESULTS

During the 14-year study period, 585 BCVIs were identified in 418 patients (66% men; age, 40 years ± 0.7 years). Eighty-three (20%) patients with BCVI did not have standard screening criteria; 66% were asymptomatic at diagnosis. Injury patterns in these patients included mandible fracture (27 patients), complex skull fractures (21 patients), traumatic brain injury with thoracic trauma (6 patients), scalp degloving (6 patients), and great vessel or cardiac injuries (4 patients). Other injuries (11 patients) and no injuries (8 patients) were identified in the remainder. Of the 307 asymptomatic patients who received antithrombotic treatment, one patient suffered stroke (0.3%) and one patient a transient ischemic attack (0.3%).

CONCLUSIONS

A significant number of patients suffering BCVI are not captured by current screening guidelines. Screening for BCVI should be considered in patients with mandible fractures, complex skull fractures, traumatic brain injury with thoracic injuries, scalp degloving, and thoracic vascular injuries.

LEVEL OF EVIDENCE: II, prognostic study.