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Before patient arrival, test participants with the 44th Medical Brigade studied patient information on the Medical Hands-free Unified Broadcast device. ( Ashley Force, U.S. Army) Testing of the device has been taking place at the U.S. Army Aeromedical Research Laboratory( USAARL) in Fort Rucker, Ala. The test, which examined how field hospital staff used the device, involved mass casualty simulations with mannequinsmocked up to look like combat victims with gunshot wounds, burns and amputations. The so-called golden hour for battlefield medical treatment is a cornerstone of U.S. military medicine. The term refers to the all-important 60 minutes following a battlefield wound and the critical importance of swift, effective medical care. MARINES 3D-PRINT CONCRETE BARRACKS IN JUST 40 HOURS Anything that helps speed up treatment could prove key to saving lives. For some patients, the Golden Hour is ultimately too long, these patients need to be treated within minutes.