[Predictive Factors of Intracranial Pressure Elevation in Patients with Severe Acute Subdural Hematoma].

Introduction: Elevated intracranial pressure(ICP)can cause secondary brain injury after severe traumatic brain injury(TBI), and ICP is the key factor that determines the outcome. Therefore, prediction of elevation of ICP during the course of the injury would allow for more effective care of patients with severe TBI. In this study, we investigated predictive factors for elevation of ICP in patients with severe acute subdural hematoma(ASDH).
Methods: Twenty patients with severe isolated ASDH were admitted to our hospital between January 2009 and April 2016. The patients were divided into two groups with a maximum ICP of ≥20mmHg(elevated ICP group)and <20mmHg(normal ICP group). Age, mechanism of injury, Glasgow Coma Scale score on admission, initial head computed tomography findings, vital signs, serological and blood gas examinations, initial ICP, and clinical outcome were evaluated.
Results: The elevated ICP group had significantly higher initial ICP(5.0±3.1 vs. 30±22.4mmHg, p<0.01), arterial oxygen pressure(151.2±68.3 vs. 314.2±197.1mmHg, p<0.05), and activated partial thromboplastin time(APTT;28.17±3.1 vs. 35.96±8.0, p<0.05)at admission, and significantly lower fibrinogen level(273.3±65.1 vs. 188.1±82.4mg/dL, p<0.05)and favorable outcome rate(p<0.01).
Conclusions: Our results show that high initial ICP, APTT, and arterial oxygen and low fibrinogen levels are associated with ICP elevation in patients with severe ASDH. These factors might be useful for the indication of therapeutic methods such as decompressive craniectomy.