Blast exposure disrupts the nanostructure of the "Blast Badge," resulting in clear changes in color (Image: Douglas H. Smith, UPenn School of Medicine)
Blast-induced traumatic brain injury from improvised explosive devices (IEDs) is the "signature wound" of the current wars in Iraq and Afghanistan. With the damage to the brain often not immediately obvious and no objective information of relative blast exposure, soldiers may not receive appropriate medical care and are at risk of being returned to the battlefield too soon. To overcome this inadequacy, researchers have developed a color-changing patch that could be worn on soldiers’ helmets and uniforms to indicate the strength of exposure to blasts from explosives in the field.
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