Ultrasonic Tourniquet

An Ultrasonic Tourniquet to Stop Battlefield Bleeding
The Pentagon is committing $51 million to creating a tool for acoustic cauterization.

The U.S. military has begun developing an ultrasonic tourniquet in an effort to stop life-threatening bleeding during combat.

Called the Deep Bleeder Acoustic Coagulation (DBAC) program, it aims to create a cuff-like device that wraps around a wounded limb. Rather than applying pressure to the wound to stem the flow of blood, the device would use focused beams of ultrasound (sound waves above the audible frequencies) to non-invasively clot vessels no matter how deep they are.

http://www.techreview.com/read_article.aspx?id=17215&ch=biotech