Computational Modeling of Bridging Vein Rupture and Acute Subdural Hematoma Growth

Area of Science:

• Biomechanics
• Computational modeling
• Traumatic Brain Injury (TBI) research

Background:

• Traumatic brain injury (TBI) can cause bridging vein (BV) rupture, leading to acute subdural hematoma (ASDH).
• ASDH exacerbates secondary brain injuries like edema and ischemia, contributing to poor clinical outcomes and mortality.
• Existing models lack precise prediction of BV rupture and subsequent hematoma growth.

Purpose of the Study:

• To develop and validate a computational schema for predicting bridging vein (BV) rupture during traumatic brain injury (TBI).
• To model the growth of acute subdural hematoma (ASDH) based on predicted BV rupture and patient-specific intracranial pressure (ICP).
• To provide a foundation for improving mortality prediction and safety system design for TBI patients.

Main Methods:

• Utilized the Global Human Body Models Consortium (GHBMC) finite element head model to analyze cerebrospinal fluid (CSF) layer deformation.
• Introduced a novel BV rupture prediction method based on statistical measures of CSF element strain, accounting for geometric variability.
• Modeled ASDH growth driven by simulated patient-specific ICP, with hematoma expansion ceasing upon pressure equilibration.

Main Results:

• The computational schema demonstrated good predictive performance when validated against real-world crash data.
• Simulations showed significant ASDH expansion, correlating with increased intracranial pressure (ICP) elevation.
• The model successfully simulated hematoma growth cessation when local cavity pressure matched ICP.

Conclusions:

• The developed computational schema effectively predicts bridging vein rupture and models acute subdural hematoma growth.
• The study highlights the link between ICP elevation and hematoma expansion, a critical factor in TBI mortality.
• This approach lays the groundwork for enhanced prediction of mortality rates and improved safety system design in TBI cases.