Blast-induced neurotrauma: surrogate use, loading mechanisms, and cellular responses

Area of Science:

• Neuroscience
• Biomedical Engineering
• Trauma Research

Background:

• Blast-induced neurotrauma is a signature wound in modern conflicts.
• Current understanding of injury mechanisms and mitigation strategies is limited.
• Improved protective equipment has increased focus on blast-related brain injuries.

Purpose of the Study:

• To elucidate the mechanism of blast-induced neurotrauma.
• To identify novel strategies for mitigating blast-induced brain injury.
• To establish a physiological basis for injury tolerance levels.

Main Methods:

• Utilized blast physics, energy-tissue coupling, shock tube experiments, and crash test dummy data.
• Employed Conventional Weapons effects software for modeling.
• Conducted an exhaustive literature review of Medline and government databases.

Main Results:

• Supported a specific hypothesis on the mechanism of blast-induced neurotrauma.
• Identified two key areas for mitigation: defining injury tolerance levels and developing pharmacological treatments for secondary neurodegeneration.
• Proposed using animal testing and biofidelic surrogates to establish injury thresholds.

Conclusions:

• Physiological or biofidelic-based blast tolerance curves could replace current acceleration-based curves for tertiary blast injury assessment.
• Further research on pharmaceutical candidates will clarify pathways of secondary neurodegeneration and aid in developing prophylactic treatments.