• Marcus Gates, Grant Mallory, Ryan Planchard, Georgia Nothdurft, Christopher Graffeo, and John Atkinson.
• Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA. Electronic address: Gates.marcus@mayo.edu.
• World Neurosurg. 2017 Apr 1; 100: 417-423.

ObjectiveIsolated traumatic subarachnoid hemorrhage (iTSAH) in mild head injuries has more evidence that triage to a tertiary care facility, intensive care unit admission, and repeat imaging is not warranted. Certain factors were identified that predict radiographic and clinical progression in hopes of preventing avoidable cost, which occur with transfer and subsequent management.MethodsA retrospective analysis identified 67 patients transferred between January 2010 and December 2014 who met inclusion criteria. Primary outcomes assessing neurosurgical intervention, radiographic, and clinical progression were documented. Secondary outcomes included any operative intervention, length of stay, standardized hospital costs, disposition at discharge, and 30-day mortality.ResultsThe mean age of the cohort was 67.7 ± 16.4 years, with most patients (82.1%) having a Glasgow coma score of 15. Warfarin was used in 10 patients (14.9%), although 55.2% were on an antiplatelet or anticoagulation agent. No patient required neurosurgical intervention. One patient, on clopidogrel (Plavix) and warfarin, neurologically declined with radiographic progression. Older age seem to correlate with radiographic progression (P = 0.05). Dementia (P = 0.05) as well as warfarin use (P = 0.06) correlated with clinical progression. Cost in patients without other injuries was associated with warfarin use (P = 0.0002), injury severity scores (P = 0.01), and initial Glasgow coma score (P = 0.0003) on multivariate analysis.ConclusionsIn this series of patients with mild traumatic brain injury, the rate of neurological deterioration due to expansion of iTSAH in patients is low, regardless of the use of antiplatelets/anticoagulants. Triage to a tertiary care facility generally is not warranted and can prove costly to patients with iTSAH without other injures.Copyright © 2017 Elsevier Inc. All rights reserved.

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