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The US military plans a portable device that uses focused sound waves to treat troops bleeding internally from wounds sustained on the battlefield. Ultrasound can seal ruptured blood vessels deep within the body without the need for risky surgery. The lightweight device has to be designed so that soldiers can operate it with minimal training. Blood loss from wounds to the extremities is regarded as a major, preventable cause of battlefield death. It's a grand challenge but we're keen to have a go at it Lawrence Crum, University of Washington The ability to treat soldiers with internal bleeding on the battlefield could prevent combat deaths and amputations, according to a US military presentation on the project. These occur, it says, due to the delay involved in evacuating soldiers from the ...