• Andrew Y Powers, Mauricio B Pinto, Ashley M Aldridge, Oliver Y Tang, Jia-Shu Chen, Rebecca L Berube, Cody Doberstein, Jordan M Fox, Joseph A Carnevale, and Wael F Asaad.
• Warren Alpert Medical School of Brown University, Department of Neurosurgery, Providence, RI, 02903, USA. Electronic address: andrew_powers@brown.edu.
• J Crit Care. 2018 Dec 1; 48: 243-250.

PurposeTraumatic subdural hemorrhage (SDH) is associated with high mortality, yet many patients are not managed surgically. We sought to understand what factors might be associated with SDH enlargement to contribute to the triage of these conservatively managed patients.Materials And MethodsA consecutive series of 117 patients admitted to our institution's level 1 trauma center for SDH between January 1, 2010 and December 31, 2010 were evaluated. Volumetric measurement of SDHs was performed on initial and follow-up head computed tomography (CT) scans with recording of initial midline shift and classification by location. Multimodel analysis quantified associations with change in SDH volume.ResultsSystolic blood pressure, presence of subarachnoid hemorrhage, and initial SDH volume demonstrated positive associations with change in SDH volume, while initial midline shift and transfusion of platelets demonstrated negative associations. Initial convexity SDH volume demonstrated positive association with change in convexity SDH volume, while initial midline shift and transfusion of platelets demonstrated negative associations. Anticoagulant/antiplatelet use demonstrated positive association with change in tentorial SDH volume, while time between CT scans demonstrated negative association.ConclusionsPlatelet transfusion, anticoagulation, and hypertension have significant associations with expansion in non-surgical cases of SDH. Monitoring these factors may assist triaging these patients.Copyright © 2018 Elsevier Inc. All rights reserved.

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